JP4413952B2 - Method, apparatus, program, and program medium for display control - Google Patents

Description

  The present invention relates to a method for displaying a scroll bar or operating a scroll bar to control a display range, an apparatus for implementing the method, a program, and a recording medium.

  As a method of handling content such as documents, pictures, and drawings that do not fit within the display range of displays and windows, scroll bars and scroll boxes use various applications such as word processors, e-book readers, WWW browsers, and editors. Widely used in equipment.

  For example, the size (length) of the scroll box displayed on the scroll bar represents the proportion of the portion displayed in the entire content. The display position of the scroll box on the scroll bar represents the relative position of the displayed part with respect to the entire content.

  In the above-described application or apparatus, the position and size of the scroll box displayed on the scroll bar are usually calculated using the layout size or the number of pages of the display content. Here, the “layout size” refers to the size of the display range in which attention is paid when content such as a sentence or a picture is displayed, and is represented by, for example, the number of dots. Here, the “number of pages” refers to the total number of pages when display is performed in units of pages.

For example, in the calculation using the layout size, the ratio of the size of the scroll box in the displayed part is
(Layout size of display range) / (All layout sizes),
The percentage of the scroll box position in the displayed part is
(Layout size from the top of the content to the top of the display range) / (All layout sizes). “Total layout size” is the layout size of the entire content including the content portion that is not displayed.

For example, when calculating using the number of pages, the ratio of the size of the scroll box in the displayed part is
(Number of pages in the display range) / (Total number of pages)
The percentage of the scroll box position in the displayed part is
(Number of pages from top to display range) / (total number of pages)
It becomes. The “total number of pages” is the number of pages including a content portion that is not displayed.

  There are two types of content display methods, such as PDF (portable document format) in which the layout and page size such as character size and position are fixed (fixed layout), and WWW (World Wide Web). Some browsers do not have a fixed character size or page size and can be freely changed by the user (variable layout).

In the case of a fixed layout, the layout size, the number of pages, and the total layout size are determined in advance by the content. In the case of a variable layout, the layout size depends on the character size and page size (number of lines, number of characters in a line, etc.). The number of pages and total layout size will change.
JP-A-5-282255 JP-A-8-314906

  However, in the case of the variable layout, since the setting of the character size and the page size changes from time to time, the layout size and the number of pages of the entire content cannot be calculated in advance. For this reason, in order to avoid laying out the entire content according to the character size and page size settings when actually displaying, the layout size and number of pages can be used to set the scroll box position and size ratio. It cannot be calculated.

  However, when the entire content is laid out, the larger the content data amount, the longer the time required for the layout process. Another problem is that a large amount of memory is required to store the layout results. Even if the memory problem is avoided by discarding the layout that is not used for display, there is a problem in that wasteful processing is performed if the layout created is discarded.

  These problems are not only caused by “displaying the scroll bar” (displaying the position and size of the scroll box corresponding to the display range), but also “control by scroll bar” (specified scroll box This also occurs when a display range corresponding to the position and size of the image is displayed. If you try to find the corresponding display range from the specified scroll box position and size ratio, if you do not know the layout of the entire content, where should you display the layout of the entire content? It is because it is not found.

  In response to such problems, the present invention provides a scroll bar display and display control using a scroll bar as quickly and accurately as possible in a variable layout document in which settings such as character size and page size can be freely changed. The main purpose is to perform processing without waste even in a small memory environment.

  In order to solve the above-described problem, the display control method according to the present invention obtains divided data size to obtain each data size of a divided document obtained by dividing a document into a plurality of parts in a place where display documents and layout are well-defined. According to the step and the position in the scroll bar of the scroll box displayed in the scroll bar for designating the display range, the reference range on the scroll box serving as a reference representing the position occupied in the document by the display range is set. A specified range data size for specifying a divided document including a specified range specified for the document so as to include a corresponding specified position data position and obtaining a data size of the specified range based on the specified divided document The acquisition step, the sum of the data sizes of the divided documents obtained from the divided data size acquisition step, and the specified range data size acquisition. From the data size of the specified range obtained from the step, a ratio acquisition step for obtaining a ratio occupied by the specified range in the document, the specified range as the display range, and according to the ratio obtained from the ratio acquisition step A scroll bar display control step for displaying a scroll bar and controlling the display content of the display range in accordance with a user's scroll bar operation, and for specifying the display range in the scroll bar display control step If the scroll box displayed in the scroll bar specifies a range including the start or end of the scroll bar, the scroll box is displayed from the beginning to the end of the document.

  In the above configuration, “display” generally means that information is output on a display medium in a form in which information can be visually perceived. The present invention is not limited to “display” for a layout display medium, but can be applied to “output” such as “print” for a layout print recording medium and “file output” for a layout data recording medium. In order to make the explanation easier to understand, in the following explanation, the word “display” is often used, but the meaning of “output” is also included.

  The “layout” means that display elements are arranged on the two-dimensional or three-dimensional space coordinates with attributes of position, size, and outer shape, or arranged. The position and size are usually expressed as values using some unit. For example, when displaying on a display composed of a collection of pixels, it is generally expressed in units of (pixel) dots. As a result of the layout of one or more display elements, the position on the spatial coordinates determined for the display element is “layout position”, and as a result of the layout of one or more display elements, the space determined for the display element The size on the coordinates may be referred to as “layout size” hereinafter.

  “Document” refers to data in which one or a plurality of display elements are laid out, or data having an amount of information that can be laid out or displayed based on the layout. The document data may include display element data, may have only layout information, and may include a part of display element data, or may not include at all. In any case, the document data can be used for display and output according to the layout.

  In the case of a scroll bar, the “specified range” of a document refers to a range to be displayed in the document. Normally, it is specified by the position, size, and outline in the laid out document. The outer shape is generally rectangular. The “designated range” is not limited to the range to be displayed but may be a range to be printed, or may be a range to be recorded on the main memory or the external memory in a data format format such as PDF.

  In general, the scroll bar indicates the position in the document where the portion of the document displayed in the display range of the display medium is located, and the ratio of the layout size of the display range to the layout size of the entire document. It is displayed or controlled based on. At this time, the ratio can be obtained if the layout size of the display range and the layout size of the entire document are known.

  In order to obtain the layout size at a high speed, a method such as calculating in advance can be considered, but in the case of a variable layout in which the user can freely change the size of the display range, font size, etc., the layout can be set according to the layout setting at the time of display. Since the size changes, even if it is calculated in advance, the result cannot be used if the layout setting changes.

  Although it is difficult to determine the layout ratio truly accurately, it can be estimated with a certain degree of accuracy. As a means of estimation, the data size is constant for both fixed and variable layouts, and the amount of information is determined independently of the layout process, so it can be easily calculated using the data size instead of the layout size. The inventor of the present application paid attention to the fact that the data size can be easily determined by processing only necessary divided documents as long as the document is configured.

  That is, according to the above configuration, the designation in the document is performed from the sum of the data sizes of the divided documents obtained from the divided data size obtaining step and the data size of the designated range obtained from the designated range data size obtaining step. The proportion of the range can be estimated.

  More specifically, each data size of the divided document can be obtained from the divided data size acquisition step regardless of the layout setting. Furthermore, the data size of the entire document can be obtained as the sum of the data sizes of the divided documents.

  Note that the designated range in a document can usually be determined by the position designated by the user for the document and the size of the display range set for the display medium. Therefore, in the designated range data size acquisition step, a divided document including the designated range can be specified by using the data position in the document associated with the designated range as a reference.

  The data size of the specified range can be obtained if a divided document is specified. For example, as a simple method, the data sizes of the specified divided documents may be added up. In this case, a divided document having a portion that is not displayed outside the specified range may be included, but in short, it results in a problem of accuracy of a ratio to be finally obtained. In the method of obtaining the data size of the specified range by adding the data sizes of the divided documents, if the accuracy is to be increased, the number of divided documents may be increased to reduce the data size of one divided document.

  This method can estimate the proportion of the specified range in the document without any layout of the document, so the processing is extremely simple and the resources required for the processing can be greatly reduced. it can.

  As another method, the specified divided document may be laid out according to the current setting of the variable layout, and the data size of the displayed portion may be obtained. This method lays out only the divided documents including the specified range, so there is no need to lay out the entire document, the processing is simple, the resources required for processing are less, and the accuracy is improved over the above method. Can be made.

  As a result, even for a document consisting of a collection of variable layouts, the ratio of the specified range can be obtained at high speed. In addition, since it is not necessary to hold the layout at all or only a part of the layout to calculate the ratio, an effect that processing can be performed with a small processing resource (CPU processing capacity, memory environment, etc.) is obtained.

  In addition, as described above, the display control method of the present invention uses the specified range as the display range, displays a scroll bar corresponding to the ratio obtained from the ratio acquisition step, and allows the user to operate the scroll bar. Accordingly, there is provided a scroll bar display control step for controlling the display contents of the display range.

  According to the above configuration, the portion of the document corresponding to the specified range is displayed, and the scroll bar corresponding to the ratio obtained from the ratio acquisition step is displayed at high speed, so that the specified range can be displayed in the scroll bar. It can be displayed with it.

  In addition, by using the position specified by the user by operating the scroll bar as a reference, even in a variable layout display system, it is possible to perform control so that the range desired by the user can be displayed at high speed. .

  As a result, even with a variable layout display system, the display and control using the scroll bar can be performed at high speed.

  Note that this method can be appropriately combined with any of the methods of the present invention already described.

  In the display control method according to the present invention, as described above, in the scroll bar display control step, the scroll box displayed in the scroll bar for designating the display range has a start or end of the scroll bar. When a range to be included is specified, the document is displayed from the beginning or the end.

  In the above configuration, when the scroll box specifies a range including the start or end of the scroll bar, if the scroll box has a fixed length, the scroll box attempts to be positioned at the center of the scroll bar. Regardless of whether it is positioned at the end, the specified range matches the display result without any deviation. However, when the length of the scroll box is an estimated value as in the present invention and can change depending on the position, it is conceivable that the designated range does not match the display result.

  Due to this discrepancy, depending on the value of the estimated value, it may not be possible to specify to display the first or last part of the document, or it may be displayed with an extra blank.

  Also, if you specify a range that includes the beginning or end of the document, it is interpreted that you want to display the range from the beginning to the end of the document rather than displaying the range of the document corresponding to the center position of the scroll box. Is more natural.

  Therefore, if the scroll box specifies a range that includes the start or end of the scroll bar, it is interpreted as a specified range that includes the beginning or end of the document, and is displayed. As a result, it is possible to avoid the above problems due to the estimation error and to perform processing according to the user's intention.

  In addition, the display control method according to the present invention is characterized by using an encoded data size such as the number of bytes or the number of bits as the data size of the divided document and the specified range in order to solve the above-described problem. .

  According to the above configuration, since bytes and bits are units of data size to be handled on the main memory or external memory, when handling document data on a computer, an encoded data size is used as an index indicating the data size. It is easy to obtain and easy to handle. As a result, it is possible to obtain an effect of simplifying the processing such as obtaining the ratio.

  In addition, you may combine this method arbitrarily with each said method of this invention already demonstrated as needed.

  The display control method according to the present invention is characterized in that a number based on a semantic unit of a divided document is used as a data size of the divided document in order to solve the above-described problem.

  According to the above configuration, when the display ratio is estimated using the data size or the like, the document data may include data that is not so much related to the layout size, for example, the character color. Therefore, in order to increase the accuracy, it is preferable to exclude data that is not significantly related to the layout size.

  The above “number based on semantic units” means the number of processing units when processing units that can be perceived by humans are considered as semantic units. In the case of documents, the number of characters (elements) and lines Number, number of line breaks, etc.

  By using the number based on such a semantic unit as the data size, there is an effect that the influence of the data not so much related to the layout size can be reduced.

  In addition, since the number based on these semantic units does not change depending on the layout processing, it can be counted in advance, and the above-described effect of enabling processing with minimal layout processing is achieved. It can be obtained without change.

  In addition, you may combine this method arbitrarily with each said method of this invention already demonstrated as needed.

  The display control method according to the present invention is characterized in that the number of characters or the number of words is used as the number based on the semantic unit in order to solve the above-described problem.

  According to the above configuration, when the number based on the above-described semantic unit is used as the data size, the accuracy of the data size increases as the semantic unit decreases, so that the calculation accuracy of the display ratio can be increased. Then, as a semantic unit, the number of words is a unit smaller than the number of line breaks or lines, and the number of characters is a unit smaller than the number of words. Therefore, among the semantic units, if the number of words is used, the calculation accuracy of the display ratio can be relatively increased, and if the number of characters is particularly used, the calculation accuracy can be further increased.

  Further, in order to solve the above problem, the display control method according to the present invention has a display element whose actual display size does not correlate with the data size in the document when obtaining the data size of the divided document or the specified range. If included, a value obtained by converting the display size of the display element into a data size is used.

  In the above configuration, the display element whose actual display size does not correlate with the data size is, for example, an image in which only data relating to the display form and data of the file name are described in the document data. In such a case, even if the display format or the file name data size is acquired in terms of the number of bytes, the number of bits, etc., the actual display size does not match and it is usually small.

  Although the size of characters and images may not be completely determined unless they are actually laid out, a certain degree of tendency appears even if the layout is made with some assumptions such as temporarily determining the reference character size. Therefore, by estimating the layout size of the display element whose actual display size does not correlate with the data size under some assumptions, and converting it to the data size, the estimation accuracy is higher than the estimation based on the data size alone. The effect that the possibility of increasing becomes large comes out.

  In addition, you may combine this method arbitrarily with each said method of this invention already demonstrated as needed.

  Further, in order to solve the above-described problem, the display control method according to the present invention has a center position of a scroll box displayed in the scroll bar for designating the display range in the scroll bar display control step. The display ratio of the center position of the display range is indicated.

  In the above configuration, the ratio of the designated range is usually constant unless the display magnification is changed. However, in the present invention, since the ratio of the designated range is estimated based on the data size, it is not always constant. Therefore, the length of the scroll box may change depending on the position of the specified range. This change in length corresponds to an estimation error.

  According to the above configuration, the center position of the scroll box that specifies the display range indicates the display ratio of the center position of the display range, so that the error is distributed to both ends of the scroll box and the length changes. There is an effect that can reduce the visual discomfort to the.

  In addition, when the user operates the scroll bar, the user can easily visually grasp the display ratio and the position of the display portion.

  In addition, in order to solve the above-described problem, the display control method according to the present invention changes the reference position on the scroll box and corresponds to the reference position on the scroll box in the scroll bar display control step. The designated position data position is changed in accordance with the designated position data position.

  According to the method explained earlier, the scroll box can be processed well even if the range including the start or end of the scroll bar is specified, but if the range that does not include the start or end slightly is specified However, if the display method using the center position of the scroll box is executed, there is a problem that the display result may be greatly skipped although the difference between whether or not the edge is included is small.

  Therefore, according to the above configuration, the specified range is interpreted so that the reference position associated with the scroll box and the display range is changed according to the position in the scroll bar of the scroll box specifying the display range.

  For example, when the scroll box is located near the center of the scroll bar, the reference position on the scroll box, which is a reference indicating the position and ratio of the display range in the document, and the reference position on the display range (specified position data) And (position) are matched in the vicinity of the center.

  Then, as the scroll box moves away from the center of the scroll bar (for example, in proportion), both reference positions are shifted together.

  In addition, when a range that includes the beginning or end of the document is specified, the start or end of the scroll box is used as the reference position, and the display range is also used as the reference position for the scroll box and display range. Match the position to the start or end.

  As a result, an effect of preventing the display from being largely shifted due to a slight difference in the position of the scroll box near the end of the scroll bar can be obtained.

  Further, in order to solve the above-described problem, the display control apparatus according to the present invention provides divided data that obtains each data size of a divided document obtained by dividing a document into a plurality of portions where the display element or layout is well-defined. A reference on the scroll box serving as a reference representing the position occupied by the display range in the document according to the size acquisition means and the position in the scroll bar of the scroll box displayed in the scroll bar to specify the display range A specified range for specifying a divided document including a specified range specified for the document so as to include a specified position data position corresponding to the position, and obtaining a data size of the specified range based on the specified divided document A data size acquisition unit, a sum of data sizes of the divided documents obtained from the divided data size acquisition unit, and the specified range data size acquisition unit From the data size of the specified range obtained from the ratio acquisition means for obtaining the proportion of the specified range in the document, and the scroll according to the ratio obtained from the ratio acquisition means, the specified range as the display range A scroll bar display control means for displaying a bar and controlling the display content of the display range in accordance with a user's scroll bar operation, the scroll bar display control means for designating the display range. If the scroll box displayed in the scroll bar specifies a range that includes the start or end of the scroll bar, make sure that the scroll box is displayed from the beginning or end of the document. Features.

  The operation and effect by this are the same as the method described above, but the explanation of the operation will be supplemented.

  The divided data size acquisition means can obtain each data size of the divided document regardless of the layout setting. For example, how to divide a document is determined in advance when creating document data, and information on how the document is divided is recorded as data on a server memory that distributes the document or as a separate file on the recording medium that records the document data. Keep it. Alternatively, it is included as part of the document data in the form of header information, etc., and when the document data is read via a recording medium or transmission medium, each piece of data size information of the divided document is stored in main memory or external storage. It may be stored.

  As a result, the divided data size acquisition unit can obtain the data size by accessing the memory, the recording medium, the main memory, or the external storage when it becomes necessary to obtain each data size of the divided document. .

  In addition, the designated range in the document is usually determined by, for example, the position designated by the user with respect to the document and the size of the display range set for the display medium. Therefore, the designated range data size acquisition unit determines the designated position. By using the reference, the divided document including the specified range can be specified, and the data size of the specified range can be obtained by the method already described based on the specified divided document.

  Finally, the ratio acquisition unit may calculate the ratio of the data size of the specified range obtained from the specified range data size acquisition unit by adding the data sizes of the divided documents obtained from the divided data size acquisition unit. it can.

  A display control program according to the present invention causes a computer to execute each step included in the scroll bar display control method in order to solve the above-described problem.

  As a result, the general-purpose computer can execute the scroll bar display control method of the present invention, and the above-described operations and effects can be obtained.

  In addition, a display control program according to the present invention causes a computer to function as each means included in the display control device in order to solve the above-described problems.

  The recording medium according to the present invention is characterized in that the display control program is recorded in order to solve the above-described problems.

  Thus, by installing the display control program from the recording medium to a general-purpose computer, the display control method of the present invention can be executed, and the above-described operations and effects can be obtained.

  As described above, the display control method according to the present invention includes a divided data size acquisition step for obtaining each data size of a divided document obtained by dividing a document into a plurality of portions at a place where display documents and layout are well-defined. According to the position in the scroll bar of the scroll box displayed in the scroll bar for designating the display range, the display range corresponds to the reference position on the scroll box that is a reference representing the position in the document. A specified range data size acquisition step for specifying a divided document including a specified range specified for the document so as to include a specified position data position and obtaining a data size of the specified range based on the specified divided document And the sum of the data sizes of the divided documents obtained from the divided data size acquisition step, and the specified range data size acquisition step From the data size of the specified range obtained from the step, a ratio acquisition step for obtaining a ratio of the specified range in the document, and using the specified range as the display range, according to the ratio obtained from the ratio acquisition step And a scroll bar display control step for controlling the display contents of the display range in accordance with a user's scroll bar operation. In the scroll bar display control step, the display range is designated. Therefore, when the scroll box displayed in the scroll bar designates a range including the start or end of the scroll bar, the scroll box is displayed from the beginning to the end of the document.

  Further, as described above, the display control apparatus according to the present invention is a divided data size acquisition unit that obtains each data size of a divided document obtained by dividing a document into a plurality of portions at a place where display documents and layout are well-defined. A designation corresponding to a reference position on the scroll box which is a reference representing the position occupied by the display range in the document according to the position in the scroll bar of the scroll box displayed in the scroll bar for specifying the display range. A specified range data size acquisition unit that specifies a divided document including a specified range specified for the document so as to include a position data position, and obtains a data size of the specified range based on the specified divided document; , The sum of each data size of the divided document obtained from the divided data size acquisition unit, and the designation obtained from the designated range data size acquisition unit From the data size of the enclosure, a ratio acquisition means for obtaining a ratio occupied by the specified range in the document, the display range as the specified range, and a scroll bar corresponding to the ratio obtained from the ratio acquisition means, Scroll bar display control means for controlling the display contents of the display range in accordance with a user's scroll bar operation, the scroll bar display control means displaying in the scroll bar to designate the display range When the scroll box specifies the range including the start or end of the scroll bar, the scroll box is configured to display from the beginning of the document to the end.

  Therefore, the present invention processes display of a scroll bar and display control using the scroll bar as quickly and as accurately as possible in a variable layout document in which settings such as character size and page size can be freely changed. There is an effect that it is possible to provide a display control method and a display control apparatus capable of performing processing without waste even in a small memory environment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, terms and concepts will be explained.

  “Display” generally means that information is output on a display medium in a form that can be visually perceived. The present invention can be applied not only to “display” of a layout for a display medium but also to “output” in general such as “print” of a layout for a print recording medium and “file output” of a layout for a data recording medium. In order to make the explanation easier to understand, in the following explanation, the word “display” is often used, but the meaning of “output” is also included.

  A “display element” refers to a data element that can be displayed, such as a character, a picture, a photograph, a figure, or a moving image. In order to display, in addition to the display position and display size, it is usually necessary for the display element to have attributes such as the outer shape and the display expression form, and the display device must have means for acquiring them. is there.

  However, the display element does not indicate only the data element in the displayed state, but also includes a data element recorded / stored for display / output on main memory, external storage, or other devices. In terms of output in some form of replacement, it may be paraphrased as “output element”, but as described above, it will be expressed as “display element” for the sake of simplicity. The display includes not only two-dimensional display but also three-dimensional display.

  For example, if the “display expression form” is a character, the contour and the inside of the character are calculated as pixel positions on the display device, and the pixels are filled with the set character color. In the case of printing instead of displaying, the act of painting with pixels is equivalent to printing dots on paper and can be output in the same manner. When outputting display element data to a PDF or the like, it can be expanded into pixel information and output as contour data before that, or the PDF data can be interpreted later by an application for PDF. In this case, the data can be output as data having a sufficient amount of information (for example, font name and character code, position, character size, character color, etc.) that can be developed into pixel information.

  The “layout” means that display elements are arranged on the two-dimensional or three-dimensional space coordinates with attributes of position, size, and outer shape, or arranged. The position and size are usually expressed as values using some unit. For example, when displaying on a display composed of a collection of pixels, it is expressed in units of (pixel) dots. As a result of the layout of one or a plurality of display elements, a position on a space coordinate determined for the display element is “layout position”. As a result of the layout of one or a plurality of display elements, a space determined for the display element The size on the coordinates may be referred to as “layout size” hereinafter.

  “Document” refers to data in which one or a plurality of display elements are laid out, or data having an amount of information that can be laid out or displayed based on the layout. The document data may include display element data, may have only layout information, and may include a part of display element data, or may not include at all. In any case, the document data can be used for display and output according to the layout.

  FIG. 1 shows an example in which a certain document is laid out. 110 in FIG. 1 indicates the entire layout, and each character or image in the layout corresponds to a layout display element. When actually displayed, the layout of the display range is cut out from here and displayed.

  In the case of a scroll bar, the “specified range” of a document refers to a range to be displayed in the document. Normally, it is specified by the position, size, and outline in the laid out document. The outer shape is generally rectangular. The “designated range” is not limited to the range to be displayed but may be a range to be printed, or may be a range to be recorded on the main memory or the external memory in a data format format such as PDF.

  When the specified range is specified by the scroll bar, the size of the scroll box becomes the size of the specified range, and the position of the scroll box becomes the position of the specified range. The size of the scroll box cannot usually be changed by direct manipulation of the scroll bar, so only the position is changed. In order to change the size of the scroll box, it is necessary to separately perform operations such as changing the display magnification.

  The operation of changing the position of the scroll box is usually performed using a mouse or a keyboard. For example, move the mouse cursor over the scroll box and press the left mouse button. While holding down the button, move the mouse to the position where you want to move the scroll box, and release the button at the position where you want to move it. The scroll box is called “drag and drop”.

  In addition, when there is a scroll button for moving the scroll box on the scroll bar (an arrow is often displayed), the scroll box is moved by a predetermined amount in a predetermined direction by pressing the scroll button. . The same operation as the scroll button may be performed by pressing a direction key or a space key on the keyboard.

  When the specified range is obtained from the scroll bar, if the size of the range in which the scroll box can be placed in the scroll bar, the position of the scroll box in the range, and the size of the scroll box are obtained, the range specified by the scroll box is known. .

  The position and size of the scroll bar and scroll box are usually represented by the number of dots displayed on the screen. For example, the range in which the scroll box can be arranged in the scroll bar is 250 dots, the scroll box is located 100 dots from the head of the arrangeable range, and occupies the size of 50 dots from there. Which end of the scroll bar is the top may be determined according to the purpose.

  When the specified range is obtained using the scroll bar, or when the currently displayed range is displayed with the scroll bar, the number of dots on the screen will eventually be the unit, but the overall size of the scroll bar may also change. Therefore, in the following, in order to make the description general, the position and size of the scroll box will be mainly described by using the ratio, not the number of dots. The ratio is a value of 0.0 to 1.0.

  For example, in the previous example, the ratio of the position of the scroll box is (100/250) = 0.4, and the ratio of the size of the scroll box is (50/250) = 0.2.

  The specification range may be specified by specifying a rectangle by dragging the mouse on the entire reduced display of the document. In this case, the position and size can be specified at the same time.

  The position and size of the specified range may be expressed in any unit system, but when specified with a scroll bar or the like, it is often obtained as a ratio in the entire document.

  Next, “division” of a document can be considered in two ways: layout division and data division. In the present invention, data division is targeted.

  The layout division is to divide the display element as a range on the coordinate space in a state where the display element is laid out. For example, it is like cutting printed paper with a scissors.

  On the other hand, the data division is to divide document data expressed as digital quantities such as bytes and bits into a data string. This cannot be perceived directly by humans, but when a data string is divided at a place where display elements and layout are well-defined (for example, before and after line breaks and paragraphs), the display and output of the divided data is in terms of layout. Since it is expressed as divided, it can be perceived indirectly. In addition, it is easier to perform subsequent processing if the data string is divided at a place where display elements and layout are well-defined.

  In either case, when a document is divided at a place where display elements and layout are well-defined, it can often be expressed as a divided state in either form of layout division or data division.

  FIG. 2 is an example in which the document data of the document layout of FIG. 1 (described in HTML) is divided. Like the divided document data 50 to 55, the original document data is divided in units of characters of the HTML source. In addition, it is divided as much as possible before and after a line feed (“<BR/>”) so that the layout is good. It is assumed that this division processing is performed when content data is created, and information on how the data has been divided can be obtained at the stage of reading the content data.

  The “data size” of a document is a value indicating the scale of the data, and is generally a size when document data is expressed and recorded as an encoded amount (digital amount) such as bytes or bits. It is assumed that the “number based on the semantic unit” and the like are included in the data size as indicating the scale of the data.

  The “number based on semantic units” of a document means the number of processing units when processing units that can be perceived by humans are considered as semantic units. In the case of documents, the number of characters (elements) and lines Numbers, line breaks, etc.

  FIG. 26 is a configuration diagram illustrating a scroll bar display control apparatus that performs the above-described scroll bar display control method according to an embodiment of the present invention.

  That is, the main parts of the scroll bar display control device are divided data size acquisition means 1, specified range data size acquisition means 2, ratio acquisition means 3, scroll bar display means 4, specified range acquisition means 5, and specified range layout acquisition means 6. The layout display means 7 and the divided document layout acquisition means 8 can be expanded and shown.

  FIG. 27 is a configuration example of a device that specifically realizes each of the means 1 to 8 in FIG.

  The CPU (central processing unit) 20 includes the divided data size acquisition unit 1, the specified range data size acquisition unit 2, the ratio acquisition unit 3, the scroll bar display unit 4, the specified range acquisition unit 5, the specified range layout acquisition unit 6, and the layout. It functions as the display means 7 and the divided document layout acquisition means 8 and obtains a program in which processing procedures by these means 1 to 8 are described from the main memory 25, the external memory 26, the network destination via the communication device 29, and the like.

  Further, the CPU 20 exchanges data with the graphic device 21, the printer 23, the speaker 24, the main memory 25, the external storage 26, the mouse 27, the keyboard 28, and the communication device 29 that are mutually connected through the bus 30 including the CPU 20. However, the processes described above are performed.

  Note that data exchange is not limited to being performed via the bus 30, but may be via a communication cable or a wireless communication device as long as data can be transmitted and received. In addition, the means for realizing each of the means 1 to 8 is not limited to the CPU, and a DSP (digital signal processor) or a logic circuit in which a processing procedure is incorporated as a circuit may be used.

  The main memory 25 is usually composed of a memory device such as a DRAM (dynamic random access memory) or a flash memory. The external storage 26 is a storage means such as an HDD (hard disk drive) or a PC (personal computer) card that can be attached and detached. Alternatively, a memory device or the like attached to another network device that is wired or wirelessly connected to the CPU 20 via the communication device 29 can be used as the external storage 26.

  As means for inputting user operations, there are a mouse 27, a keyboard 28, a microphone 31, and the like. In addition, various means such as buttons and a touch panel can be used.

  The graphic device 21 is usually realized by a graphic card or the like, has a VRAM (video random access memory), converts data on the VRAM into a display signal, and sends the display signal to a monitor 22 connected to the graphic device 21. 22 displays the display signal as an image.

  The printer 23 prints the print data obtained via the bus 30 on a sheet. The speaker 24 outputs sound data obtained via the bus 30 as sound. The mouse 27, keyboard 28, and microphone 31 transmit user input to other means via the bus 30.

  The communication device 29 is realized by a network card or the like, and exchanges data with other network devices connected via a network by wireless or wired communication.

  The means for realizing each means 1 to 8 in FIG. 26 will be described, including the viewpoint of data exchange between the means.

  The CPU 20 as the divided data size acquisition unit 1 in FIG. 26 obtains the data size of each divided document from the main memory 25, the external storage 26, the communication device 29, and the like. The data size of each divided document is assumed to be already described in the document data or obtained by interpreting the document data. The format of the data size of each divided document will be described later. For example, a structure as shown in FIG. 6 can be considered.

  The processing by the CPU 20 as the designated range data size acquisition unit 2 in FIG. 26 includes reading the processing program from the main memory 25, the external storage 26, the communication device 29, etc., and including the data position and size information from the designated range layout acquisition unit 6. This is done by obtaining the layout data of the specified range, processing according to the processing program, and outputting the data size of the specified range to the ratio acquisition means 3. The contents of the output processing program will be described later based on a flowchart and the like.

  The CPU and DSP read the processing procedure as a program. However, when the processing procedure is incorporated as a circuit such as a logic circuit, it is not necessary to read the program.

  The processing by the CPU 20 as the ratio acquisition unit 3 in FIG. 26 reads the processing program from the main memory 25, the external storage 26, the communication device 29, etc., obtains the data size of the specified range from the specified range data size acquisition unit 2, and divides the processing program. This is done by obtaining the data size of each divided document from the data size acquisition means 1, processing according to the processing program, and passing the ratio to the scroll bar display means 4. The contents of the output processing program will be described later based on a flowchart and the like.

  The processing by the CPU 20 as the designated range layout acquisition unit 6 in FIG. 26 reads a processing program from the main memory 25, the external storage 26, the communication device 29, etc., obtains the designated range from the designated range acquisition unit 5, and acquires the divided data size. The data size of each divided document is obtained from the means 1, the layout of the divided document is obtained from the divided document layout obtaining means 8, and is processed according to the processing program, and the designated range layout, data position, size, etc. are obtained. This is done by passing to the means 2 and the layout display means 7. The contents of the output processing program will be described later based on a flowchart and the like.

  The CPU 20 as the layout display means 7 in FIG. 26 outputs the output expression format of the display elements in the specified range to the output destination (graphic device 21 and monitor 22, printer 23, etc.). As described in the explanation of terms, the output expression format is written as pixel data on the VRAM of the graphic device 21 and displayed on the monitor 22 when displayed on the monitor 22, for example. On the other hand, in the case of printing, for example, it is sent to the printer 24 as print data, and the printer 24 interprets the print data and prints it on paper. In the case of PDF, data for arranging characters at corresponding positions is written as PDF data and recorded through the main memory 25, the external memory 26, the communication device 29, and the like.

  The CPU 20 as the designated range acquisition means 5 in FIG. 26 obtains data of the designated range from a program that is read from the main memory 25, the external storage 26, the communication device 29, or the like, or by a user operation, the mouse 27, the keyboard 28, and the microphone 31. Or as data input from the graphic device 21, the main storage 25, the external storage 26, the printer 23, or the communication device 29.

  For example, if the size of the window displayed on the monitor 22 is set to the size of the specified range, the CPU 20 refers to the window size data on the main memory 25 or calls the window size acquisition API, etc. Get the size data. For printing, the CPU 20 refers to paper setting data on the printer 23 or the main memory 25 or the external storage 26 in which paper settings are recorded, or calls the paper size acquisition API to obtain the paper size. Good.

  For example, if the position of the scroll box on the scroll bar displayed on the monitor 22 is set as the position of the specified range, the CPU 20 refers to the position of the scroll box on the main memory 25 or the scroll bar information acquisition API. The data of the position of the specified range is obtained by calling.

  The CPU 20 as the scroll bar display unit 4 in FIG. 26 outputs the scroll bar to the output destination (graphic device 21 and monitor 22, printer 23, etc.) according to the ratio of the specified range obtained from the ratio acquisition unit 3. The output implementation method is the same as that of the layout display means 7, but the output content is a scroll bar.

  The CPU 20 as the divided document layout acquisition unit 8 in FIG. 26 obtains divided document layout data from the main memory 25, the external storage 26, the communication device 29, and the like. It is assumed that the layout data has already been created by other programs such as the layout processing of the WWW browser, and can be obtained by calling these other programs and processing routines. Inside these routines, if there is a layout that has already been created, it will be used, and if it has not been created or the display settings have changed, it will be recreated. Although the format of the layout data will be described later, a structure as shown in FIG. 8 can be considered.

  FIG. 28 shows an example of the appearance of the apparatus. The display unit 122 is provided on the main body 123, which also serves as a tablet function and can be operated by the pen 124. In the display means 122, the layout of the specified range is displayed, and a scroll bar 120 is displayed beside it. There is a scroll box 121 in the scroll bar 120.

  The specified range can be specified by touching the scroll bar 120 or dragging the scroll box 121 with the pen 124 and operating the tablet. In FIG. 27, the display unit 122 corresponds to an input operation unit such as a mouse or a keyboard.

  FIG. 3 is a flowchart showing a scroll bar display control method according to an embodiment of the present invention.

In this flowchart, as a typical operation of the user using the scroll bar,
(1) Use the scroll box to specify the range that the user wants to display,
(2) Display the specified range,
(3) The entire series of processing until the scroll box corresponding to the displayed range is displayed again on the scroll bar is described. (1) and (2) mainly correspond to “control by scroll bar”, and (3) mainly corresponds to “display of scroll bar”.

  First, an overview of these processes will be described. Details of each process will be described later.

  First, in step S10 (hereinafter, “step S” is abbreviated as “S”), the designated range acquisition unit 5 obtains the designated range as described above, and connects the connection point P10 (hereinafter, “connection point P”). The process proceeds to S11.

  The “specified range” is as described above in the explanation of words. For example, it is assumed that the designated range is instructed by the user using a scroll bar or a range designation operation in the entire reduced display. The range specifying operation using the scroll bar is as described above in connection with the definition of “specified range”.

  The range obtained from the scroll bar is assumed to be obtained as a percentage of the entire document.

  As for the size of the specified range, the ratio of the size specified in the scroll box may be used, but when the present invention is used with the scroll bar, it seems natural for the user to use the dot size of the display screen of the display means. So let's use that value. In this case, the dot size of the display screen of the display means is always the same as the layout size of the displayed content portion.

  In general, the scroll box corresponds to “layout of the displayed content portion”, and its position and size are determined by the position and size on the entire layout of “layout of the displayed content portion”. The size of the “layout of the displayed content” and the size of all layouts are determined by laying out the entire content, so the scroll box size can be moved no matter how much the scroll box is moved on the scroll bar. (And the percentage of size on the scroll bar) is usually fixed.

  Although details will be described later, in this embodiment, the position and size of the “layout of the displayed content portion” on the entire layout are estimated from various data sizes without obtaining the total layout size. As a guess, the size of the scroll box (and its percentage) may vary slightly depending on the display range. Therefore, if an attempt is made to display a part of the content corresponding to the previous scroll box size (and the ratio of the size), the layout size may not match the dot size of the display screen of the display means. In that case, the display may be missing or a part that cannot be displayed may appear. This results in an unnatural display result for the user.

  Therefore, it is preferable that the designation range is designated not by the size of the scroll box but by the dot size of the display screen of the display unit, because it is less uncomfortable for the user.

  Although the outer shape of the designated range is a rectangle, a method similar to that described here can be applied in principle even if it is not a rectangle.

  S10 corresponds to “(1) The user designates a display range using a scroll box” described above.

  In S11, the designated range layout obtaining unit 6 obtains the layout of the designated range obtained in S10 according to the characteristic method of the present invention, and proceeds to S12 via P20. Details of the processing here will be described later with reference to FIG.

  In S12, the layout display means 7 displays the layout of the designated range obtained in S11, and proceeds to S13 via P30.

  Regarding the acquisition of the layout of the designated range, which will be described later with reference to FIG. 11 and the like, the display elements at the upper and lower limits of the layout are obtained, and the display elements between them are the display elements of the layout of the designated range.

  Although the display method is not the gist of the present invention and will not be described in detail, the display expression form of each display element is displayed in accordance with the position and size of each display element in the layout document, the external shape, the display magnification, and the like. . Since the position of the display element is a value in the layout coordinate system, when displaying, the display element is usually converted into the display coordinate system from the display means origin and displayed.

  FIG. 4 shows an example in which the display elements of the display range (designated range) 111 are extracted from the layout 110 of the entire document shown in FIG. The display elements in the layout 110 are represented by a coordinate system in which the upper left corner of the layout 110 is the origin, the right direction is the + X direction, and the lower direction is the + Y direction. By subtracting the coordinate value of the start position of the display range 111 from the coordinate value of the position of each display element, it is converted into a display coordinate system with the upper left of the display means 122 as the origin, and is within the range of the display means 122 Only is displayed.

  S11 and S12 correspond to the “(2) display the specified range” described above.

  In S13, the ratio acquisition unit 3 calculates the position and ratio of the display range in the entire document based on the specified range according to the characteristic method of the present invention, and proceeds to S14 via P40. Details of the processing here will be described later with reference to FIGS.

  As described in the description of S10, the position of the designated range is designated by the ratio in the entire document, but the size is designated by the display size (for example, dot size). If the size is specified as a ratio in all documents, it is not necessary to calculate in S13, and the position and size specified in the ratio may be used as they are.

  In S14, the scroll bar display unit 4 obtains the positions and sizes in all the documents obtained in S13, displays the scroll bar 120, and ends the process.

  In FIG. 4, a scroll box 121 indicating the position and size of the display range 111 is shown in black on the scroll bar 120.

  S13 and S14 correspond to the above-described process “(3) display on the scroll bar a scroll box corresponding to the displayed range”.

  According to the above-described processing, in accordance with the numbers described above, (1) for the designated range designated by the user operating the scroll bar or the like, (2) the layout corresponding to the designated range is displayed, Further, (3) a scroll bar corresponding to the designated range is displayed.

  Generally, when trying to view content, operations (1) to (3) are repeated to view various places. In some cases, instead of the scroll bar of (1), a range to be displayed next is specified using a keyboard, a mouse, or the like. For example, when the space key is pressed in the WWW browser, the display for the next page is designated. Note that this repetitive processing is not limited to viewing content, and operations such as editing and processing may be sandwiched between them.

  FIG. 5 is a flowchart showing details of the processing of S11 of FIG. 3 which is a feature of the display control method of the present invention.

  In order to describe the processing specifically, the position of the designated range obtained in S10 of FIG. 3 is set to 0.5, and the size is set to 100 dots at the top and bottom (200 dots in total) centering on the designated position.

  First, the process proceeds to S20 via P10, and the designated range layout obtaining unit 6 obtains the data size of each divided document from the divided data size obtaining unit 1, and then proceeds to S21.

  Each divided document is created in advance. That is, how the content is divided is determined in advance, and information on how the content is divided is recorded as data. For example, it may be recorded as an array of values of the term “data size” in FIG. This may be recorded on a recording medium as a file separately from the content data, or may be recorded in the form of header information as part of the content data.

  The data size of each divided document is obtained from the “information on how to divide” described above. The layout size of each divided document changes depending on the character size setting in the case of a variable layout, but the data size of each divided document does not change even in the variable layout. One of the reasons why the control and display by the scroll bar can be performed at high speed in the present invention is because the data size can be obtained in advance.

  FIG. 6 is an example of the data size of each obtained divided document. It is assumed that the data size 70 to 75 of each divided document is obtained as an array of values. Below that, the sum “604” of data sizes 70 to 75 is also shown. The data size ratio 80 to 85 is a ratio when the sum of the data sizes 70 to 75 is 1.00. Since the sum of the data sizes 70 to 75 is 604, for example, the data size ratio 80 can be obtained by 126/604 = 0.21 (hereinafter, the third decimal place is rounded off for explanation). The cumulative data size ratio 90 to 96 is a cumulative value of the data size ratio 80 to 85 (in order to reduce the cumulative error, the value in FIG. 6 is not the sum of rounded 80 to 85 but the data size The ratio is calculated from the sum, so there are some parts that do not match the sum of the data size ratios). The first 0.00 and the last 1.00 are also included. Data sizes 70 to 75, data size ratios 80 to 85, and cumulative data size ratios 90 to 96 can be accessed by index numbers starting from 0.

  A method of dividing each divided document will be briefly described. There is no rule on how to divide, but it is generally better to divide in semantic units with good separation for display. A well-separated semantic unit is a larger semantic unit such as “line feed” or “paragraph” as a matter of course, such as a character unit.

  For example, in the example of FIG. 2, there are many places where the line is divided after “<BR/>” or “<P />” as a line feed. This is because, as will be described later, when the layout is performed in units of divided documents, if the layout of each divided document is grouped in units with good delimiters such as line breaks, the layout of each divided document is independent. This is because there is an advantage that can be achieved.

  For example, as can be seen from the layout result of FIG. 1, the layout result of the divided document data 50 of FIG. 2 ends with the line “Narrow view” because “<BR/>” is the last, and the divided document data 51 The layout result of starts with "Human vision" from the beginning of the next line. Since the lines are separated, it is only necessary to display each line side by side. Therefore, there is no problem even if the layout is created in the order of the divided document data 51 and the divided document data 50.

  If you divide in a poorly divided part, you must lay out on the same line so that the part is continuous. For example, the layout result of the divided document data 54 in FIG. 2 ends with “function is”, but does not end with “<BR/>” or “<P />”, so no line break is made here. Accordingly, the layout result of the subsequent divided document data 55 becomes “with human vision” following the “function is” line. As a result, the divided document data 54 and the divided document data 55 have the same layout result line.

  For this reason, it is only necessary to lay out the divided document data 54 and the divided document data 55 in this order. However, if the divided document data 55 and the divided document data 54 are laid out independently in this order, the “function” part is the end of the line. Not necessarily laid out, but if it is laid out in the middle of a line, a strange white space will follow. And the beginning of the next line becomes “with human vision”. This breaks the connection as a sentence.

  In order to avoid this, for example, it is necessary to temporarily discard the layout of the divided document data 55 and recreate the divided document data 54 and the divided document data 55 in this order. This is a very wasteful process.

  Therefore, it is better to divide the document at a portion having a good delimiter such as a line feed like the divided document data 50 to 53.

  Further, the data size and layout size of each divided document may not be too large or too small. If a unit for creating a layout is a divided document, a very large divided document takes a long time for layout. On the other hand, if it is too small, there will be many portions for recording the data size of the divided document, and the calculation of the ratio will be somewhat increased (although it is usually not much compared with the time required for layout).

  Also, even if you try to make it too fine, it is not always possible to divide it at a place where a line break is good. One criterion for the amount of division is the amount of content displayed on one screen with standard display settings. For example, it may be set to be within a range of about 0.5 to 2 times this.

  In addition, it is generally better to divide each divided document so that there is no significant difference in the data size or layout size of each divided document. This also has the meaning of preventing a large difference in layout time.

  Note that when content data is compressed or encrypted, if it can be expanded and decrypted in units of divided documents, there is an advantage that the time required for layout in units of divided documents can be reduced. Come.

  In S21, the designated range layout acquisition unit 6 identifies the divided document at the designated position, and proceeds to S22.

  By comparing the designated position with the accumulated data size ratios 90 to 96 in FIG. 6 and checking which section the designated position falls in, it is possible to obtain which divided document the designated position is located in. In the example, since the designated position is 0.5, it can be seen that it is located between the value 0.34 of the cumulative data size ratio 92 and the value 0.53 of 93. Since this section corresponds to the data size ratio 82 and the data size 72, it can be seen that the divided document in the designated range includes at least the third divided document data 52.

  FIG. 7 shows this state, and the divided document data 50 to 55 are expressed by a height that is approximately proportional to the data size 70 to 75. The designated center position is 0.5, which indicates that it is included in the third divided document data 52.

  In S22, the divided document layout acquisition unit 8 obtains the layout of the divided document including the designated position, and proceeds to S23 via P11. The divided document including the designated position is designated by the designated range layout acquisition unit 6.

  In this example, the divided document layout acquisition unit 8 obtains the layout of the divided document data 52. If the layout data of the divided document data 52 is stored as cache data or the like in the main memory 25, the external memory 26, or another device, it can be used as it is. If it is not stored, the divided document data 52 may be read to create a layout.

FIG. 8 shows an example of the data structure of the laid out display element data. Here, the document data is in HTML format,
“<HTML> that <BR/><IMG SRC =“ img. png "/><BR/> e </ HTML>"
Is shown as an example of layout data obtained as a result of layout by a WWW browser or the like. Since the layout method itself is not the gist of the present invention, the details are omitted. Even if it is not a WWW browser, a word processor may be used as long as the data as shown in FIG. 8 can be obtained by layout processing.

  As shown in FIG. 8, each row of the display elements 40 to 44 has data start position, data size, layout X position, layout Y position, layout width, layout height, and display data information.

  The data start position means the first data position where this display element is described in the document data. The first display element 40 corresponds to the first “A” character of the HTML data, and since it is the seventh byte, the data start position is set to “6” since it starts from 0. If the full-width character is expressed by 2 bytes, the data size is “2”, the layout X and Y positions are “0” when the origin is the origin, the size is “14”, the character size is 14 dots, and the display data Is the character code of the character “A”. Actually, it is necessary to indicate that this display data is “character” by some kind of identifier. However, since the display element display method itself is not the gist of the present invention, it can be omitted and only the character “A” can be displayed. It is assumed that the information is represented.

  Similarly, the display elements 41 to 44 are as shown in FIG. The display element 43 is an example of an image element represented by “<IMG...>”, The image size (layout size) is 50 dots × 100 dots, and the display data is the image file name “img.png”. ing.

  In S23, the designated range layout acquisition unit 6 determines whether a layout having a size specified in the specified range has been secured, and acquires the layout of surrounding divided document data from the divided document layout acquisition unit 8 if necessary. After P15, the process proceeds to S24. Details of the processing here will be described later with reference to FIG.

  In S24, the designated range layout acquisition means 6 acquires the display element of the designated range, and goes to P20. Details of the processing here will be described later with reference to FIG.

  Through the above processing, the processing of S11 in FIG. 3 is performed, and the layout of the specified range is obtained.

  FIG. 9 is a flowchart showing details of the process in S23 of FIG.

  In this example, it is assumed that the scroll bar is in the vertical direction, and the lower the layout, the earlier the document content. For this reason, in the following description, the expression “down” is used for the layout of the previous contents, and the specified range and layout are mainly described in the vertical direction (layout Y position in FIG. 8).

  Proceeding from P11 to S30, the designated range layout acquisition unit 6 determines whether or not the layout in the upper part of the layout already acquired from the divided document layout acquisition unit 8 is insufficient compared to the specified range. If so, the process proceeds to S31 via P12, and if sufficient, the process proceeds to S32 via P13.

  FIG. 10 shows an example of data used to make this determination, which is stored in the main memory 25, the external memory 26, or another device. The starting divided document index 100 is the first index number of divided document data for which a layout has already been acquired. Similarly, the end divided document index 101 is the last index number of the divided document data whose layout has already been acquired. Here, only the third divided document data is laid out, and the index number of the first divided document data is set to 0 as described above, so both are “2”.

  The designated position data position 102 indicates which position the designated position indicates in the data size of the document. This is calculated by multiplying the total data size by the specified position (ratio). You can use the calculated value as is, or search for the data start position (or plus (display element data size / 2)) of the display element that contains that value or has the closest data range, and use that value. Also good.

In the example of FIG. 6, the center position (designated position) 0.5 is
(Sum of all divided document data sizes) x (specified position ratio)
= 604 * 0.5 = 302
Therefore, it becomes the 302nd byte. In the divided document data 52 of FIG. 2, it corresponds to “di” of “range”. In the display range 111 of FIG. 1, this designated position is represented by a circle mark at the center.

The upper layout size 103 and the lower layout size 104 mean how much size is laid out above and below the specified position data position 102 (including the center of the row). Here, since the start divided document index and the end divided document index in FIG. 10 are 2, only the divided document 52 in FIG. 2 is laid out. From FIG. 1 showing the entire document layout, the layout of the divided document 52 is five lines from “Human is” (starting with a full-width space) to “Low”. Assuming that the height of one line is 16 dots (characters 14 dots + line spacing 2 dots) and is divided at the center of the line “di”, the top (layout of 4.5 lines) = 16 × 4.5 = 72 Below the dots (0.5 line layout) = 16 × 0.5 = 8 dots. Note that “4.5” and “0.5” are because processing is performed at “the center of the row including the designated position data position 102”, and the row is divided into 0.5 rows at the top and bottom. .

  Each value in FIG. 10 is updated every time a layout of each divided document is obtained.

  In this example, since the size of the designated range is 100 dots up and down centered on the designated position, it is not sufficient as compared with 72 dots of the upper layout size 103, so the designated range layout acquisition means 6 determines that the upper layout is insufficient.

  In S31, the designated range layout obtaining unit 6 obtains the layout of the divided document data 51 from the divided document layout obtaining unit 8, and proceeds to S32 through P13. Details of the processing here will be described later with reference to FIG.

  In S32, the designated range layout acquisition means 6 determines whether or not the layout below the specified range is insufficient with respect to the currently acquired layout. If not, the process proceeds to S33. Break through. Since the process here is the same as the process related to the upper layout in S30, a description thereof will be omitted.

  In S33, the designated range layout acquisition unit 6 acquires the layout of the lower divided document data from the divided document layout acquisition unit 8, and the process goes to P15. Since the process here is also the same as the process related to the upper layout in S31, the description thereof is omitted.

  Through the above processing, the processing of S23 in FIG. 5 is performed, and a layout of the designated range is obtained.

  FIG. 12 is a flowchart showing details of the process of S31 of FIG.

  Proceeding from P12 to S40, the designated range layout obtaining unit 6 obtains a layout amount that is insufficient on the upper side, and proceeds to S41.

  This can be done by subtracting the upper layout size 103 of FIG. 10 from the upper size of the specified range. In the case of FIG. 10, a value of 100−72 = 28 dots is obtained.

  In S41, the designated range layout acquisition means 6 determines whether or not the upper insufficient layout amount obtained in S40 is 0. If it is 0, the process goes to P13, and if it is not 0, the process goes to S42.

  In S42, the designated range layout obtaining unit 6 determines whether or not there is an upper divided document. If there is, the process proceeds to S43, and if not, the process exits to P13.

  Whether there is an upper divided document can be determined by checking whether the starting divided document index 100 in FIG. In the description of S33, the process is the same as the process related to the upper layout. However, only in the process of S42, whether or not the lower divided document exists is determined by the end divided document index 101 (number of divided documents− 1) Depending on whether or not.

  In S43, the designated range layout acquisition unit 6 acquires the layout of the upper divided document from the divided document layout acquisition unit 8, updates the data in FIG. 10, and proceeds to S40.

  The process of S31 of FIG. 9 is performed by the above process.

In this example, by further reading the divided document data 51, from FIG.
(3 lines of layout) = 16 × 3 = 48 dots are added above,
Since (upper layout size 103) = 72 + 48 = 120 dots> specified 100 dots, this is sufficient for reading the upper layout. In this case, the start divided document index 100 is updated to 1, and the upper layout size 103 is updated from 72 to the upper limit of 100.

The bottom is that by reading the divided document data 53 (8 lines of layout) = 16 × 8 = 128 dots are added below.
(Lower layout size 104) = 8 + 128 = 136 dots> Specified 100 dots, so it is sufficient to read the lower layout. In this case, the end divided document index 101 is updated to 3, and the lower layout size 104 is updated from 8 to 100, which is the lower limit.

  FIG. 11 is a flowchart showing details of the process in S24 of FIG.

  Proceeding from P15 to S70, the designated range layout obtaining means 6 obtains an upper limit display element, and proceeds to S71 via P16. Details of the processing here will be described later with reference to FIG.

  In S71, the means 6 obtains the lower limit display element and goes to P20. Since the process here is the same as the process of S70, description is abbreviate | omitted.

  The process of S24 of FIG. 5 is performed by the above process.

  FIG. 13 is a flowchart showing details of the process in S70 of FIG.

  Proceeding from P15 to S80, the designated range layout acquisition means 6 sets the display element at the designated position as the current element, and proceeds to S81. The display element of the designated position may be searched for a display element including the designated position data position 102 in FIG. 10 or having the closest data range. To search, it is sufficient to look at the layout data of the divided document including the designated position in order.

  In S81, the means 6 obtains a display element before the current element, and proceeds to S82.

  In S82, the means 6 determines whether or not the layout size from the display element at the designated position to the display element obtained in S81 exceeds the upper layout size 103 in FIG. If not, the process proceeds to S84. To obtain the layout size from the display element at the designated position to the display element obtained in S81, the difference between the layout Y position of the current element (FIG. 8) and the layout Y position of the display element before the current element obtained in S81. Just take it.

  In S83, the means 6 exits to P16 using the current element as the upper limit display element.

  In S84, the means 6 sets the upper display element as the current element and returns to S81.

  The process of S70 of FIG. 11 is performed by the above process.

  FIG. 14 is a flowchart showing details of the process of S13 of FIG. 3 which is a feature of the display control method of the present invention.

  Proceeding from P30 to S50, the designated range data size obtaining unit 2 obtains the data size SD of the designated range, gives it to the ratio obtaining unit 3, and proceeds to S51.

  Although the display element of the designated range is acquired in S11 of FIG. 3, the data size of the designated range can be obtained at the same time. As described with reference to FIGS. 5, 11, and 13, the first and last display elements of the designated range can be obtained. Since the display element has the data start position and data size attributes as shown in FIG. 8, if the data start position of the first display element is subtracted from (data start position + data size) of the last display element, the specified range Data size can be obtained.

  As an example, here, the position of the designated range is 100 dots up and down centering on the 12th row from the top of FIG. = 100/16) The data size in the specified range is obtained. 6.25 lines above the center of the designated line where “di is low” is the center of the 6th line from the top of FIG. ) Further up to 0.25 lines up to 0.75 lines below the same “reaching more than” line is included in the designated range. The lower 0.75 lines are 12 dots (= 16 × 0.75).

  Similarly, the lower side of the designated line is from the top of the 18th line of “Human is essentially in parallel” to the 0.25th line below from the center of the line (so far, 6 lines from the center of the designated line). Since the range is included, it is up to 0.75 lines (= 12 dots) on the upper side of the same “human beings in parallel” line.

  The determination depends on whether or not to include a line that is cut off in the middle depending on the upper and lower limits of the display range, but here it is considered to be included in the display. Accordingly, it is assumed that the range from the top of the sixth line to the end of the 18th line is the range for obtaining the data size.

Then, the first display element is the first character “degree” on the sixth line from the top, and corresponds to the eleventh character “degree” in the divided document data 51, so the data start position is determined from the data structure as shown in FIG. Just get it. Originally, you should be able to get the data start position at the same time when creating the layout, but for the sake of explanation here, when you calculate the data start position of the first display element,
(Start byte position in the divided document data) = (Number of bytes for 11 characters) = 11 × 2 = 22 bytes From the data start position,
(Previous divided document data size) + (start byte position in the divided document data) = 126 + 22 = 148 bytes.

When the data start position of the last display element is similarly calculated, the last display element is included in the fourth divided document data 53, and here corresponds to “ni” of “in parallel”. Therefore, if the start byte position in the divided document data 53 is obtained by subtracting 18 characters after “ni”, etc.,
(Divided document data size) − ((number of bytes for 18 characters) + (number of bytes of “<BR/>”) + (number of bytes of “<P />”) + (number of bytes of line feed code)) = 161- (18 × 2 + 5 + 4 + 1) = 115
It becomes. As a result, the data start position of the last display element is
(Previous division document data size) + (start byte position in division document data) = (126 + 77 + 117) + 115 = 435 bytes.

Then, the data size SD of the specified range is obtained by the calculation of ((data start position of the last display element) + (data size of the last display element)) − (data start position of the first display element).
435 + 2-148 = 289
It becomes.

  In S51, the ratio acquisition unit 3 acquires the data size AD of all documents from the divided data size acquisition unit 1, and the process proceeds to S52.

  Since the data size of all documents is the sum of the data sizes of the divided documents, AD is 604 as shown in FIG. Alternatively, if the data size of all documents is recorded somewhere or obtained from recording means such as a file system, it may be used.

  In S52, the ratio acquisition unit 3 calculates the ratio of the designated range from the data size SD of the designated range obtained in S50 and the data size AD of all the documents obtained in S51, and the process goes to P40.

  For example, if the data size SD of the specified range is simply divided by the data size AD of all documents, the ratio of the size of the specified range can be obtained. Here, 289/604 = 0.48.

  7 indicates that the specified range data size SD in FIG. 7 is 48% of the total document data size AD. In FIG. 4, the scroll box 121 is 48% of the scroll bar 120 and the center position 50. It is displayed in%.

  The process of S13 of FIG. 3 is performed by the above process.

  As described above, the ratio of the position and the data size occupied by the specified range in the document can be obtained from the data size when the document is divided into a plurality of parts and the position and data size of the specified range. it can.

  In addition, by displaying the layout of the specified range and displaying the scroll bar at the obtained position and ratio, it is possible to display the scroll bar corresponding to the specified range.

  Furthermore, by designating the position of the designated range on the scroll bar, the display range can be controlled according to the user's scroll bar operation.

  Generally, the scroll bar is displayed or controlled based on the ratio of the display range and layout size to the layout size of all documents. In order to obtain the ratio, the layout size related to the display range and the entire document is originally required. In order to obtain the layout size at high speed, a method such as calculating in advance can be considered, but in the case of variable layout, the layout size changes depending on the display size of the display means and the layout setting at the time of display. I can't keep it.

  Although it is difficult to truly accurately determine the layout ratio of the display range without determining the layout size of the entire document, it can be “estimated” (the meaning of this term will be explained later) with a certain degree of accuracy. Therefore, in this embodiment, in order to obtain the display layout and data size of the specified range, only the minimum necessary divided document is laid out (S11 in FIG. 3), and the layout of other divided documents is not obtained. Then, the layout ratio is estimated from the data size of the designated range (S13 in FIG. 3, particularly S50 to 52 in FIG. 14).

  As a result, even for a document composed of a collection of variable layouts, it is possible to obtain the ratio of the designated range at a higher speed than when all the documents are laid out. In addition, since it is not necessary to hold all layouts in order to calculate the ratio, there is an effect that processing can be performed even in a small memory environment.

  Note that the term “estimation” does not mean that the ratio calculated using the data size is incorrect. For example, both the ratio of the position obtained using the data size and the ratio of the position obtained using only the layout size both increase and decrease the required ratio when the position of the specified range increases or decreases. Therefore, the basic function as a scroll bar is satisfied regardless of which method of obtaining the position ratio.

  However, the ratio calculated using only the layout size is a constant ratio between the change in the position of the specified range and the change in the ratio, but if the ratio is calculated using the data size, the ratio is constant. The ratio varies somewhat depending on the position of the specified range.

  In an easy-to-understand example of whether the ratio is constant or not, in the case of the ratio obtained using only the layout size, if the user scrolls the display range at a constant speed, the position of the display range in the document The position of the scroll box indicating gradually changes accordingly, and the moving speed of the scroll box at that time is also constant. However, in the case of the ratio obtained using the data size, if the user scrolls the display range at a constant speed, the scroll box indicating the display range gradually changes accordingly, but the moving speed of the scroll box is constant. Don't let it go faster or slower depending on the location.

  In addition, the size of the scroll box is a constant size when the ratio is obtained using only the layout size, but the size is slightly changed depending on the position of the scroll box when the ratio is obtained using the data size. A slight change in the moving speed and size of the scroll box is not a big problem to use as a scroll bar, but you may feel a little uncomfortable.

  In an application that displays a document or the like, the scroll bar is usually required only by using the layout size, and the user is used to that. Therefore, if you do not want the user to feel uncomfortable, the ratio calculated using only the layout size is “ideal”, and the ratio calculated using the data size should be as close as possible to the ideal value. . In the sense that we want to find a value that is as close as possible to the ideal value, finding the ratio using the data size is called "estimation". The term “error” that appears later also refers to the difference between the ideal value and the value obtained using the data size as “error”, “estimation error”, and the like based on the same concept.

  For the sake of explanation, the case where the ratio is obtained using only the layout size is sometimes referred to as “layout size base”, and the case where the ratio is obtained using the data size is sometimes referred to as “data size base”.

By the way, when “error” is calculated, in the example of FIG. 4, the size of the specified range is 200 dots, and the size of the dot unit of the entire layout is (height for 27 lines) = 16 × 27 = 432 dots. Therefore, the ratio of the ideal display range size in dot units when layouts are obtained for all divided documents is 200/432 = 0.46, and the designated range by the actual layout is 46%. . In the estimation based on the data size in byte units, the estimation error is 2% because the size is 48% as described above.

In addition, the position on the layout of the estimated center position (the position of 11.5 lines since the center of the 12th line) is
(Height for 11.5 rows) / 432 = (16 * 11.5) /432=0.43
The position is 43%. On the basis of the layout size, since the center position of the designated range is 50%, the estimation error is 7%. This is represented by the display range 111 (data size base) and the display range 113 (layout size base) in FIG. The display range 113 is an ideal designated position on the layout, and deviates from the designated position of the display range 111 obtained by estimation here.

  In the description of S50 in FIG. 14, the layout of the specified range is used to explain the case where the specified range is specified by the specified position and the display size. However, the size of the specified range is not a display size but data. If the size is specified, it is not necessary to obtain the data size from the layout, and it is simpler to use the specified data size as it is. Furthermore, if it is sufficient to simply obtain the ratio, such as displaying only the scroll bar instead of displaying the layout of the specified range, the process becomes simpler, and the layout need not be obtained.

  In FIG. 6, the number of bytes is used as the data size of the divided document, but a method using other units is also conceivable. For example, a semantic unit.

  For example, a method using the number of characters as a semantic unit will be described. The data may include information that is not necessarily directly related to the layout position and size, such as designation of character color and comments. By counting the number of characters actually laid out in advance, there is an effect that a value closer to the layout size than the number of bytes can be obtained.

  There are various ways to count the number of characters, for example, how to handle a control character string that does not appear directly in the display of HTML tags, etc., or whether to use two half-width characters as two half-width characters. FIG. 15 shows a data size example in which the divided document data of FIG. 2 is counted by the number of characters. The data sizes 170 to 175 are obtained by ignoring all control characters such as HTML tags, and counting by the number of half-width characters with two full-width characters.

  Compared with FIG. 6, it can be seen that the data size ratios 180 to 185 and the cumulative data size ratio 190 to 196 have changed as the data sizes 170 to 175 have changed. In FIG. 15, since the center position 0.5 of the designated range is at the boundary between the cumulative data size ratio 192 and the cumulative data size ratio 193, the display element serving as the display center is processed based on the data of FIG. And slightly back and forth.

  The detailed calculation process is omitted because the original data is the same as that of FIG. 6 except that the original data is that of FIG. 15, but the center position of the designated range comes to the boundary between the cumulative data size ratio 192 and the cumulative data size ratio 193. Therefore, the first character “” (double-byte space) of the divided document data 53 is used. In FIG. 1, this is the first character on the 13th line from the top, and the center position is the position on the 12.5th line.

Since the calculation of the position and size on the layout is the same as in the case of the byte unit described above, the detailed description is omitted and only the formula is shown, but the ratio of the center position is
(Height for 12.5 rows) / 432 = (16 * 12.5) /432=0.46
Thus, 46% and the error is 4%. In the case of byte unit, the error was 7%, so the accuracy of the center position is a little better.

  Since the designated range is 6.25 lines up and down from this center position, the range is from “(2)” on the seventh line from the top to “ability to do” on the 19th line. Since “(2)” is the 19th character in the divided document data 51, the data position is (62 + 19 × 2 = 100), and “force” is the 59th character in the divided document data 53, so the data position is (62 + 54 + 94 + 59 × 2). = 328), and the data size SD of the specified range is 230 obtained by adding the data size of the end character to the difference.

  Since SD / AD = 230 / (62 + 54 + 94 + 132 + 22 + 60) = 0.54, the size is 54% and the error is 8%. In this case, the error is larger than the error of 2% calculated in bytes based on FIG. That is, the error varies depending on the contents of the document data, and the estimation accuracy is not improved in all cases.

  As the data size of the divided document, for example, a method of using the number of words or the number of lines in addition to the number of bytes and the number of characters can be considered. The number of words is easy to use as a semantic unit when the word division is clear, such as English. In the case of a line break, the line break code in the data description is not necessarily the line break in the layout, so it is generally better to use the number of line breaks in the layout. If the number of line breaks alone is different, the accuracy is not good if the length of one line varies, so it is better to combine it with the number of characters.

  The error in FIG. 15 is greatly affected by ignoring the processing relating to the image portion. In FIG. 6, the “<IMG>” tag representing the image is counted in terms of the number of bytes, but it does not directly represent the size of the image, so it is still inaccurate. In order to correct this, a method of using a value obtained by converting a display size of a display element such as a character or an image included in a sentence into a data size can be considered.

  For example, if the character size changes in the middle, (number of characters) = (data size), that is, just counting the number of characters will reduce the accuracy of the data size, but depending on the change in character size, ) × (character size ratio) = (data size), etc., the accuracy can be improved. Similarly, the image can be improved in accuracy by converting the display size and area of the image into the data size.

For example, the image eye.designated by the IMG appearing in the divided document data 54 of FIG. Assume that the size of png is 70 dots × 35 dots. When a 14-dot × 14-dot full-width character (1 dot between characters, 2 dots between lines) is used as a unit, this image is
(Character width size) = (Character width) + (Between characters) = 14 + 1 = 15
(Data horizontal size) = ((image width) + (character size) -1)) / (character size))
= (70 + 14-1) /14=5.9
(Character vertical size) = (character height) + (line spacing) = 14 + 2 = 16
(Data vertical size) = ((image height) + (character vertical size) -1) / (character vertical size)
= (35 + 16-1) × 16 = 3.2
(Data size) = (data horizontal size) × (data vertical size) = 5 × 3 = 15 characters (full-width) = 30 characters (half-width)
Convert to the data size of minutes. Here, since the vertical and horizontal characters are integers, (data horizontal size) and (data vertical size) are both rounded down to the nearest decimal point.

  FIG. 16 is obtained by adding this converted value to FIG. Compared with FIG. 15, the conversion value 30 is added to the data size 174 of FIG. 15, and the data size ratio 280 to 285 and the cumulative data size ratio 290 to 296 are also associated with the redefinition of the data size 270 to 275. You can see that it has changed.

Since the original data is the same as the processing of FIG. 15 except that it is FIG. 16, the detailed description is omitted, but the center position of the designated range is the character “B” of “60 dB” in the fourth divided document. . Since this is the 14th line from the top, the center position is at the 13.5th line (height for 13.5 lines) / 432 = (16 * 13.5) /432=0.50
Thus, the center position is 50%, and the error is 0%. A result overlapping the ideal display range 113 in FIG. 1 was obtained.

  Since the designated range is 6.25 lines up and down from this center position, the range is from "Human" on the 8th line to "Hold" on the 20th line. Since the space “” of “Human is” is the first character in the divided document data 52, the data start position is (62 + 54). Since the end character “.” Of “has” is the last character in the divided document data 53, the data position is (62 + 54 + 94 + 132), and the data size SD of the designated range is 226 of the difference.

  Since SD / AD = 226 / (62 + 54 + 94 + 132 + 52 + 60) = 0.50, the size is 50%, and the error from the layout size base is 4%.

  Compared to the byte unit of FIG. 6 and the character unit of FIG. 15, when compared comprehensively by the sum of the error of the center position and the error of the size, the byte unit of FIG. The error when the size of the designated range is calculated in units of 15 characters is 8%, compared to 4% when the number of characters conversion method of FIG. 16 is used, and the error is compared with the method of FIG. It is getting smaller. Similarly, the error 2% can be further reduced by adding a value obtained by converting the display element of the image into bytes in the method of FIG.

  Of course, depending on the content of the document, the error may increase, but by adding a conversion value that considers the layout size factor in the data size calculation, there is a possibility that a value close to the layout base value can be obtained. It can be said that it will increase.

  In this way, there is an effect of increasing the possibility of increasing the estimation accuracy by using a value obtained by converting the display size of display elements such as characters and images included in the document into the data size.

  By the way, in the method described so far, for example, as shown in FIG. 4, the position of the specified range (the center position of the scroll box 121) is made to coincide with the center of the display range.

  FIG. 17 explains this situation in detail. For easy understanding, the range displayed in the entire layout is surrounded by a frame, and a scroll bar is added next to it. Only the layout inside the frame and the scroll bar are actually displayed.

  The size (length) of the entire scroll bar is SA, the size of the scroll box is SD, the size from the start position of the scroll bar to a reference point SP (described later) is SM, and the upper side of the reference point SP in the scroll box. Is SPD and the lower size is SFD.

  Similarly, the size of the entire layout is LA, the size of the layout in the specified range is LD, the size from the top to a reference point LP (described later) is LM, the size above the reference point LP is LPD, and the lower side is LPD. The size is LFD. The explanation symbols are written separately on the right scroll bar side and the left layout side, but symbols having similar meanings have the same character (column) at the end of the symbol name.

  The “reference point” means where in the specified range (display range) on the scroll bar or layout the “position” of the specified range (where the reference is based). The layout reference point LP displays the layout by the size of the upper and lower LPD and LFD of that point. The scroll bar reference point SP displays the scroll box by the size of the upper and lower SPD and SFD of the point.

  The scroll bar reference point SP and the layout reference point LP represent the same position proportionally in the entire document. Therefore, SM / SA = LM / LA. In FIG. 17, SP and LP happen to be aligned on a straight line, but depending on how to set the reference point and the position of the scroll bar, they may not be aligned on a straight line as shown in FIG.

  The scroll bar reference point SP means the position (specified position) of the specified range, if it is easy to understand. In FIG. 17, the scroll box is located at the center of the scroll bar, and SM = SA / 2 and SPD = SFD.

  On the other hand, the layout reference point LP is a position on the layout corresponding to the scroll bar reference point SP. In the example of FIG. 17, the position designation is indicated by the ratio (LM / LA). In FIG. 17, since the scroll bar reference point SP points to the middle of the scroll bar, the layout reference point LP is also located at the center of the row of the center layout “human light receiving ability is 60”. At this time, LM = LA / 2 and LPD = LFD.

  The scroll bar reference point SP is usually set at the center of the scroll box. That is, when the display range is designated by the scroll box, the layout is displayed so that the position on the layout corresponding to the center position of the scroll box becomes the center of the display. Conversely, when displaying a scroll bar of a certain display range, the scroll bar is displayed so that the position on the scroll bar corresponding to the center of the layout of the display range is the center of the scroll box.

  In a scroll bar based on the layout, the size of the scroll box corresponds to the size of the display range, and the size of the scroll box does not change unless the size of the display range or the display magnification is changed.

  However, in the present invention, the size of the scroll box is speculative, and is sequentially obtained according to the position of the designated range and the data size included in the designated range, and thus changes depending on the movement of the scroll box, for example. Since the display range is specified by the layout size, if 200 dots, 200 dots are always displayed, and the display magnification does not change, but the size of the scroll box changes. With a normal scroll bar, the size of the scroll box does not change unless the display magnification is changed, so the user may feel a little uncomfortable.

  However, if the center position is used as the position of the specified range, the expansion and contraction of the scroll box is distributed at both ends, so that there may be an effect that the feeling of strangeness is somewhat relieved.

  However, if the position of the scroll box is specified near the position touching the first or last end of the scroll bar, taking the center position of the scroll box as a reference point may not work.

  In FIG. 18, when the scroll box 121 is moved to the upper end of the scroll bar 120 and the display range is specified, the scroll box 121 is positioned at the upper end, the display is displayed without a gap from the first line, and is specified by the normal scroll bar. This is a non-problematic example displayed in the same way. However, depending on the contents and the state of the scroll box, it may not be displayed as shown in FIG. 18 and may be displayed differently from the user's intention.

  For example, in FIG. 19, when the scroll box 121 is moved to the upper end and the display range is specified, the first line is not displayed and the display is displayed halfway though the scroll box 121 is positioned at the upper end. This is an example. FIG. 19 is actually a state in the middle of processing.

  If it demonstrates with the process along the flowchart figure of FIG. 3, moving the scroll box 121 to an upper end will correspond to S10, and the process which displays a designated range is equivalent to S12. As a result of displaying the designated range in S12, it is displayed from the middle of the document as shown in FIG. The process of displaying the scroll bar 120 in accordance with the display range in FIG. 19 corresponds to S14. FIG. 20 shows the result of displaying the scroll bar 120 in accordance with the display range of FIG. 19 in S14. When the scroll bar display is aligned with the display range, there should be a little space above the scroll box 121 as shown in FIG. The user finally sees the state of FIG.

  FIG. 21 is an example in which when the scroll box 121 is similarly moved to the upper end and a display range is designated, a blank is displayed before the first line. As in FIG. 19, the process of the flowchart of FIG. 3 is performed all the time. However, unlike FIG. 19, FIG. 21 is almost in the state that the user finally sees. May be smaller).

  If the scroll bar display is forcibly adjusted to the display range, such a display is not actually possible. However, as shown in FIG. 22, the scroll box 121 penetrates the scroll bar 120 upward, and this originally has no layout. It shows that even the place has been displayed. (For convenience of explanation, the same content is used. However, when the display range is specified by moving the scroll box to the upper end, FIG. 19 and FIG. 21 do not occur at the same time, depending on the content and the state of the scroll bar. It is just an example in the sense that both can happen).

  Such a problem occurs because the size of the scroll box changes depending on the position (the reason why the size changes is explained when the meaning of the word “guess” is described). The size of the scroll box changes when, for example, the size of the scroll box 121 is displayed from the top position of the content as shown in FIG. 18 and when the scroll box is displayed from the middle position of the content as shown in FIG. That is, the size of the scroll box 121 is not necessarily the same.

  When a new display range is specified using a layout size-based scroll box, the scroll box is usually moved by using a mouse or the like. At that time, the size of the scroll box does not usually change. However, there is a problem if the data size based scroll box is used to specify the display range in the same way.

  For example, assume that the scroll box 121 having the size shown in FIG. 4 is moved to the upper end position of the scroll bar 120 with a mouse or the like. The size of the scroll box 121 remains as shown in FIG. The user's intention is to display as shown in FIG. 18, but in some cases, the display may be as shown in FIG. 20 or FIG. The direct cause is that the display range specified by the scroll box 121 at this time cannot be specified as the range from the top of the content.

  The reason why the range from the beginning of the content cannot be specified is that the designation of the center position of the scroll box 121 at this time is the position of the scroll box 121 when the display range is from the beginning of the content. This is because it is deviated from the center position. Since the designated range is specified by how many dots above and below the center position of the scroll box, if the center position of the scroll box is the same, it should be the same designated range. However, as described above, since the size of the scroll box 121 in FIG. 18 and the size of the scroll box 121 in FIG. 4 are not necessarily the same, the center position of the scroll box when the scroll box is moved to the upper end. Will no longer be the same. This is the reason why the display is as shown in FIGS.

  The size of the scroll box 121 at the time of FIG. 18 is difficult to obtain in advance because it cannot be obtained unless layout is performed. In addition, during the operation of the scroll box 121, since the size of the scroll box 121 does not normally change, even if it can be known in advance, it is difficult to reflect it in the operation of the scroll bar 120. Even if it can be reflected, in order to change the size of the scroll box 121 only when the user wants to move to the end, it is necessary to know the intention of the user, but this is more difficult.

  In order to prevent these problems, when the user designates a position that touches the end as the designated range, the scroll bar reference point SP may be taken without taking the center position of the scroll box. Similarly, the layout reference point LP also takes the end of the display range.

  In other words, the size of the designated range has been set to 200 dots including the upper and lower portions of LPD = LFD = 100 dots in the previous examples. For example, when the upper end is designated, LPD = 0 dots on the upper side and LFD = 200 dots on the lower side. In total, 200 dots may be used. The opposite is true for the lower end.

  FIG. 23 shows a state in which the scroll bar reference point SP is taken at the upper end of the scroll box and the layout reference point LP is taken at the upper end of the display range. In FIG. 24, the reference points SP and LP are not located at the ends, but are located at the ends in FIG.

  Specifically, these processes may be performed by determining whether or not the scroll box is positioned at the upper end or the lower end of the scroll bar when obtaining the designated range in S10 of FIG.

  In this way, if the scroll box is specified as a range that includes the beginning or end of the scroll bar, display control is performed so that the document is displayed from the beginning to the end of the document. There is an effect that can be performed.

  However, if it is limited to cases that include edges, there may be a large shift in the displayed range when the edges are included and when the edges are not included slightly, and the continuity of scroll bar operation is lost. It may be broken.

  This is because the reference point is suddenly changed only when the scroll bar reaches the end, so the reference point is smoothed or stepped according to the position of the scroll box or the range where the scroll box is located. By changing to, discontinuity can be suppressed.

  There are various ways to change the reference point, but the simplest method is to use the center of the scroll box when the scroll box is at the center, the end of the scroll box when it is at the end, and linear between them. There is a way to change. Similarly, the layout reference point is changed accordingly.

  Specifically, FIG. 17 shows when the scroll bar is in the center, FIG. 23 shows when the scroll bar reaches the end, and FIG. 25 shows an intermediate state. In the following, for general description, description will be made based on FIG.

In FIG. 25, when designated by the scroll bar, the size SM from the start position of the scroll bar to the reference point SP is determined by where the reference point is taken in the scroll box. Let ST be the size of the empty space above the scroll box in the scroll bar. ST is when the scroll box is in the center
SM / SA = 0.5, ST = (SA-SD) / 2
And if the scroll box is at the top,
SM / SA = 0.0, ST = 0.0
So,
SM = 0.5 × ST / ((SA-SD) / 2)
Then, SM can be obtained linearly. That is, instead of directly obtaining the SM from the position of the scroll box, the SM is obtained by paying attention to the size of the remaining part other than the scroll box.

If SM is found, LM / LA = SM / SA,
LM = LA × (SM / SA)
LM can be obtained.

Next, although LPD and LFD, since LPD / LD = LM / LA,
LPD = LD × (LM / LA)
The LPD can be obtained with LFD is also obtained by LFD = LD-LPD. Thereby, the layout range to be displayed is obtained.

When the layout range is obtained, scroll bar drawing is performed, but since SM is obtained, SPD, SFD, and SD may be obtained. SD can be obtained because the ratio of the scroll box can be obtained if SM, LPD, and LFD are determined by the method of the present invention described above. For SPD and SFD, SPD / SD = LPD / LD may be used.
SPD is obtained by SPD = SD × (LPD / LD). SFD is also obtained from SFD = SD-SPD. As a result, information, SM, SPD, SFD sufficient to display the scroll bar can be obtained.

  It should be noted that when the scroll bar is redisplayed with these calculation results, SD and ST may slightly change from those when the operation is performed with the scroll bar, but there is little discomfort because it is not a significant change.

  With the above processing, the layout range corresponding to the designation by the scroll bar is displayed and the scroll bar corresponding to the layout range is displayed while preventing the display and the scroll bar from changing discontinuously at the end of the scroll bar. Will be able to.

  In addition, by changing the reference position in accordance with the ratio representing the position of the scroll box, the display range can be changed continuously, so that the designation by the scroll bar can be performed continuously. Come out.

  By the way, when displayed by this method, the height direction of the reference points should almost coincide as shown in FIG.

  By the way, in the methods described so far, the data size of the display range is obtained from layout, user designation, etc. However, if the accuracy may be rough, a method of using divided documents including the display range as a unit may be considered. That is, when the data size of the designated range is acquired in S50 of FIG. 14, the sum of the data sizes of the divided documents including the designated range is used as the data size of the display range. As a result, the process of obtaining the data size of the display range can be omitted, and the process can be simplified.

  Similarly, regarding the position of the designated range, if the accuracy may be coarse, a method of calculating in units of divided documents can be considered. It is only necessary to obtain only which divided document is indicated and to display from the head or middle of the divided document. This has the effect of simplifying the processing.

  In addition, although the example using the data size of the divided document as the data size has been described, for example, if the divided document is divided with substantially the same data size or layout size, the data size of the divided document including the specified range as the data size is described. Even if the number is used, the ratio can be almost estimated. The process of obtaining the data size and calculating the sum of each divided document also takes a certain amount of processing time if the number is large, but if it can be estimated only by the number of divided documents, these processes can be further omitted. There is.

  In the above-described method using divided documents as a unit, the accuracy can be improved as the division method is made finer.

  As described above, when the divided data size obtaining unit 1 obtains the data size of the divided document obtained by dividing the document into a plurality of parts, and the designated range obtaining unit 5 obtains the range designated by the user, the designated range layout is obtained. The means 6 specifies a divided document including the specified range, and the specified range data size acquisition means 2 obtains the data size of the specified range based on the data size of the specified divided document. Thereby, the ratio acquisition unit 3 can calculate the position and ratio of the scroll box in the specified range from the sum of the data sizes of the divided documents and the data size of the specified range.

  As a result, according to the present invention, it is possible to realize high-speed and high-precision scroll bar display control with less processing time and resources even in a display system whose layout changes depending on the size setting of characters and display windows.

  In Patent Document 1 (Japanese Patent Application Laid-Open No. 5-282255), when there are a plurality of items consisting of a plurality of pages, the division of each item is displayed on a scroll bar, and the display is performed in units of pages. The displayed page range is displayed as a scroll box.

  At first glance, each item and each page seems to correspond to the divided document of the present invention, but it is a completely different invention.

  In the first place, the problems of the invention are different. The problem with this publication is that “the location desired by the user can be displayed easily and reliably, and when the notebook information has a plurality of items, the amount of each item can be grasped”. An object of the present invention is to process scroll bar display and control as fast and as accurately as possible in a variable layout document, and to perform processing without waste even in a small memory environment.

  Since the problems are different, the means for solving the problems are also different. In this publication, information on the number of pages of each item is used to display and control the scroll bar so that the user can easily understand. In other words, there is a point of the invention in the way of displaying the information on the number of pages, and there is no point of the invention in the method for obtaining the information on the number of pages.

  Therefore, a method for calculating the information on the number of pages with a variable layout at a high speed with a small amount of memory is not described in the claims, and is not described in the embodiments. It is described as being prepared in advance.

  The present invention uses a step / means (ratio acquisition step) for obtaining the position and size of a scroll box from a divided document or a “data size” of a specified range, so that a scroll bar can be formed with a small amount of memory at high speed even in a variable layout. It shows that it can be displayed / controlled. In other words, the point of the invention is that the calculation for performing the display / control of the scroll bar with the variable layout is performed at high speed and in the memory saving, and the point of the invention is in the display method after the calculation is obtained. Not.

  Therefore, as a method for displaying / controlling the scroll bar with a small memory at high speed even in a variable layout, a method using a divided document or a data size of a specified range is described in the claims.

  Thus, both are different inventions having different problems and using different means.

  In Patent Document 2 (Japanese Patent Laid-Open No. 8-314906), a page break width corresponding to the document amount is calculated, and a scroll bar to which a page number is assigned is displayed / controlled by the page break width. The page break width is calculated from the layout size.

  At first glance, this seems to be equivalent to the scroll box size obtained from the data size of the divided document according to the present invention, but this is a completely different invention.

  In the first place, the problems of the invention are different. The problem of this publication is that “the pages with different document volumes are displayed on the scroll bar with equal width, so that the approximate document volume of each page cannot be grasped”. As described above, an object of the present invention is to process scroll bar display and control at high speed and as accurately as possible in a variable layout document, and to perform processing without waste even in a small memory environment.

  Since the problem is different, the means for solving the problem is also different. In this publication, the document amount of each page is used to display and control the scroll bar so that the user can know the document amount of each page. That is, there is an invention point in how to display the document amount of each page, and there is no invention point in the way of acquiring the document amount of each page.

  Although it is stated in the claims that the document size of each page uses the layout size, there is no description of a method for obtaining the layout size with high speed and memory saving. It is only described that all layout sizes are obtained.

  In the present invention, as described above, as a method for displaying / controlling a scroll bar with a small amount of memory at high speed even in a variable layout, a method using a divided document or a data size of a specified range is described in the claims. ing.

  Thus, both have different problems and are different inventions using different means.

  An object of the present invention is to supply a storage medium (such as the main storage 25 or the external storage 26) on which a program code of software for realizing the functions of the above-described embodiments is recorded to the system or apparatus, and to Needless to say, this can also be achieved by a computer (or CPU or MPU) reading and executing the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

  As a storage medium for supplying the program code, for example, a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a magnetic tape, a nonvolatile memory card, or the like can be used.

  The program code may be downloaded from another computer system to the main memory 25 or the external memory 26 via a transmission medium such as a communication network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. It goes without saying that the CPU of the expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

  When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the flowcharts described above.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims.

  The display control method of the present invention specifies a divided data size acquisition step for obtaining each data size of a divided document obtained by dividing the document into a plurality of parts, and specifies a divided document including a designated range specified for the document. The specified range data size acquisition step for obtaining the data size of the specified range by laying out at least a part of the specified divided document according to the setting at that time, and each data size of the divided document obtained from the divided data size acquisition step And a ratio acquisition step of obtaining a ratio of the specified range in the document from the sum of the data and the data size of the specified range obtained from the specified range data size acquisition step.

  In the above configuration, “layout” means that display elements are arranged with the attributes of position, size, and outer shape on two-dimensional or three-dimensional spatial coordinates, or are arranged. The position and size are usually expressed as values using some unit. For example, when displaying on a display composed of a collection of pixels, it is expressed in units of (pixel) dots.

  According to the above configuration, at least a part of the specified divided document is laid out according to the setting of the variable layout at that time, and the data size of the displayed part is obtained. In addition, fewer resources are required for processing, and the accuracy can be improved.

  The reason for laying out at least a part of the specified divided document is that it is not necessary to lay out the divided document that is completely included in the specified range because the data size can be used as it is for the ratio calculation. That is, the data size of the specified range can be obtained by laying out only the divided documents partially protruding from the specified range according to the settings at that time.

  Further, the display control apparatus of the present invention includes a divided data size acquisition unit that obtains each data size of a divided document obtained by dividing the document into a plurality of parts, and a specified range based on a position specified for the document. A specified range data size acquisition unit that specifies a divided document and obtains a data size of the specified range based on the specified divided document, a sum of each data size of the divided document obtained from the divided data size acquisition unit, and a specified range You may have a ratio acquisition means which calculates | requires the ratio which the said specified range occupies in a document from the data size of the said specified range obtained from the data size acquisition means.

  The operation and effect by this are the same as the method described above, but the explanation of the operation will be supplemented.

  The divided data size acquisition means can obtain each data size of the divided document regardless of the layout setting. For example, how to divide a document is determined in advance when creating document data, and information on how the document is divided is recorded as data on a server memory that distributes the document or as a separate file on the recording medium that records the document data. Keep it. Alternatively, it is included as part of the document data in the form of header information, etc., and when the document data is read via a recording medium or transmission medium, each piece of data size information of the divided document is stored in main memory or external storage. It may be stored.

  As a result, the divided data size acquisition unit can obtain the data size by accessing the memory, the recording medium, the main memory, or the external storage when it becomes necessary to obtain each data size of the divided document. .

  In addition, the designated range in the document is usually determined by, for example, the position designated by the user with respect to the document and the size of the display range set for the display medium. Therefore, the designated range data size acquisition unit determines the designated position. By using the reference, the divided document including the specified range can be specified, and the data size of the specified range can be obtained by the method already described based on the specified divided document.

  Finally, the ratio acquisition unit may calculate the ratio of the data size of the specified range obtained from the specified range data size acquisition unit by adding the data sizes of the divided documents obtained from the divided data size acquisition unit. it can.

  Further, the display control method according to the present invention includes a divided data size acquisition step for obtaining each data size of a divided document obtained by dividing the document into a plurality of parts, and a designated range based on a position designated for the document. A specified range data size acquisition step for identifying a divided document and obtaining a data size of the specified range based on the specified divided document, a sum of each data size of the divided document obtained from the divided data size acquisition step, and a specified range A ratio acquisition step of obtaining a ratio of the specified range in the document from the data size of the specified range obtained from the data size acquisition step.

  The data size is constant for both fixed and variable layouts, and can be obtained immediately without performing layout processing. Even if a part of the layout is necessary for display or the like, it is not necessary to obtain the entire layout, and accordingly, the processing amount and the resources necessary for the processing can be reduced.

  As a result, even for a document consisting of a collection of variable layouts, the ratio of the specified range can be obtained at high speed. In addition, since it is not necessary to hold the layout at all or only a part of the layout to calculate the ratio, an effect that processing can be performed with a small processing resource (CPU processing capacity, memory environment, etc.) is obtained.

  In addition, as described above, the display control method according to the present invention includes a divided data size acquisition step for obtaining each data size of a divided document obtained by dividing the document into a plurality of parts, and a position specified for the document as a reference. A specified range data size acquisition step for determining a data size of the specified range by laying out at least a part of the specified divided document according to the setting at that time, A ratio acquisition step for obtaining a ratio of the designated range in the document from the sum of the data sizes of the divided documents obtained from the obtaining step and the data size of the designated range obtained from the designated range data size obtaining step. You may have.

  As a result, at least a part of the specified divided document is laid out according to the setting of the variable layout at that time, and the data size of the displayed part is obtained, so there is no need to lay out the entire document, the processing is simple, It is possible to reduce the amount of resources required for the process and to improve the accuracy.

  In addition, as described above, the display control method according to the present invention uses the specified range as a display range, displays a scroll bar corresponding to the ratio obtained from the ratio acquisition step, and responds to the user's scroll bar operation. A scroll bar display control step for controlling the display content of the display range may be provided.

  As a result, even with a variable layout display system, the display and control using the scroll bar can be performed at high speed.

  Further, as described above, the display control method according to the present invention uses an encoded data size such as the number of bytes or the number of bits as the data size of the divided document and the specified range.

  As a result, when document data or the like is handled on a computer, the data size can be easily obtained and handled. As a result, there is an effect that processing such as obtaining a ratio is also simplified.

  Further, as described above, the display control method according to the present invention may use a number based on the semantic unit of the divided document as the data size of the divided document.

  As a result, by using the number based on the semantic unit as the data size, there is an effect that the influence of the data not so much related to the layout size can be reduced in the document data.

  In addition, the number based on these semantic units is not changed by layout processing, so it can be counted in advance, and the effect of enabling processing with minimal layout processing is unchanged. Obtainable.

  In addition, as described above, the display control method according to the present invention may use the number of characters or the number of words as the number based on the semantic unit.

  As a result, if the number of words is used in the semantic unit, the calculation accuracy of the display ratio can be relatively increased. In particular, if the number of characters is used, the calculation accuracy can be further increased.

  In the display control method according to the present invention, as described above, when obtaining the data size of the divided document or the specified range, the document includes a display element whose actual display size does not correlate with the data size. In this case, a value obtained by converting the display size of the display element into a data size may be used.

  As a result, the size of characters and images may not be completely determined unless they are actually laid out. However, even if layout is performed with some assumptions, such as tentatively determining the reference character size, there will be some tendency. Come. Therefore, by estimating the display element size where the actual display size does not correlate with the data size based on some assumptions and converting it to the data size, there is a possibility that the estimation accuracy will be higher than when estimating only by the data size The effect will be larger.

  In the display control method according to the present invention, as described above, in the scroll bar display control step, the center position of the scroll box displayed in the scroll bar for designating the display range is the center position of the display range. May be displayed.

  As a result, an error in estimating the ratio of the designated range based on the data size can be distributed to both ends of the scroll box, and the visual discomfort with respect to the change in length can be reduced.

  In addition, when the user operates the scroll bar, the user can also intuitively grasp the display ratio and the position of the display portion visually.

  In the display control method according to the present invention, as described above, in the scroll bar display control step, the scroll box displayed in the scroll bar for designating the display range includes the start or end of the scroll bar. If a range is specified, the document may be displayed from the beginning to the end.

  As a result, if the scroll box specifies a range that includes the start or end of the scroll bar, it is interpreted as a specified range that includes the beginning or end of the document, and the display is displayed. By doing so, it is possible to avoid problems due to estimation errors and to perform processing according to the user's intention.

  Further, the display control method according to the present invention, as described above, in the scroll bar display control step, according to the position in the scroll bar of the scroll box displayed in the scroll bar for designating the display range, The reference position on the scroll box serving as a reference indicating the position and ratio of the display range in the document may be changed, and the reference position on the display range associated with the reference position may be changed.

  As a result, an effect of preventing the display from being largely shifted due to a slight difference in the position of the scroll box near the end of the scroll bar can be obtained.

  In addition, as described above, the display control apparatus according to the present invention provides a divided data size acquisition unit that obtains each data size of a divided document obtained by dividing a document into a plurality of parts, and a position specified for the document as a reference. A specified range data size acquisition means for determining a data size of the specified range based on the specified divided document, and each data size of the divided document obtained from the divided data size acquisition means And a ratio acquisition means for obtaining a ratio of the specified range in the document from the sum of the above and the data size of the specified range obtained from the specified range data size acquisition means.

  The effect of this is similar to the method described above.

  The display control program according to the present invention may cause a computer to execute each step included in the scroll bar display control method in order to solve the above-described problem.

  As a result, it is possible to cause a general-purpose computer to execute the display control method of the present invention and obtain the above-described effects.

  In addition, the recording medium according to the present invention may record the display control program in order to solve the above problems.

  Thus, by installing the display control program from the recording medium to a general-purpose computer, the display control method of the present invention can be executed, and the above effects can be obtained.

In the scroll bar display control method of this invention, it is explanatory drawing which shows the difference in the interpretation of the designated range by the difference in the method of calculating | requiring the data size of a division | segmentation document. It is explanatory drawing which shows the division | segmentation document data which comprises the document layout of FIG. It is a flowchart figure which shows schematically the procedure of the scroll bar display of the scroll bar display control method of this invention, and a control process. It is explanatory drawing which shows the example which displayed the display element of the display range 111 in the whole document of FIG. 1 with the scroll bar. It is a flowchart figure which shows the procedure of the designated range layout acquisition process of FIG. It is explanatory drawing which shows the example of the data size of each division | segmentation document. It is explanatory drawing which shows the relationship between the designated range and the data size of the division | segmentation document containing a designated range. It is explanatory drawing which shows the data structural example of the display element data laid out. FIG. 6 is a flowchart showing a procedure of a divided document layout acquisition process around FIG. 5. It is explanatory drawing which shows the example of a data structure used when judging the lack of layout. FIG. 6 is a flowchart showing a processing procedure for acquiring a layout of a designated range in FIG. 5. It is a flowchart figure which shows the procedure of the upper side layout acquisition process of FIG. It is a flowchart figure which shows the procedure of the process which acquires the upper limit layout display element of FIG. FIG. 4 is a flowchart showing a procedure of processing for calculating a ratio in all documents in FIG. 3. It is explanatory drawing which shows the example which obtained the data size of the divided document by the number of characters. It is explanatory drawing which shows the example which obtained the data size of the divided document by the number of characters, and the value which converted the image into the number of characters. FIG. 10 is an explanatory diagram showing a state in which a reference position that is a reference for obtaining a position and a ratio of a display range in the entire layout near the center of a document is set at the center in both the display range and the scroll bar. It is explanatory drawing which shows the example displayed without a problem, when the first part of a document is designated with the scroll box. It is explanatory drawing which shows the example displayed when the upper part was missing when the first part of the document was designated with the scroll box. It is explanatory drawing which shows the original layout of the whole layout in the case of FIG. 19, a display range, and a scroll bar. It is explanatory drawing which shows the example which displayed the upper part vacant when the first part of the document was designated with the scroll box. It is explanatory drawing which shows virtually the original layout of the whole layout in the case of FIG. 21, a display range, and a scroll bar. It is explanatory drawing which shows the state which the reference position used as the reference | standard which calculates | requires the position and ratio of the display range which occupies for the whole layout in the head of a document is set to the start end by both the display range and the scroll bar. FIG. 5 is an explanatory diagram showing a state where a reference position that is a reference for obtaining the position and ratio of the display range in the entire layout at the head of a document is set near the center in both the display range and the scroll bar. It is explanatory drawing which shows the state which changes the reference position used as the reference | standard which calculates | requires the position and ratio of the display range which occupies for the whole layout according to the position of a scroll box with a display range and a scroll bar. It is a block diagram which shows the functional structure of the scroll bar display control apparatus of this invention mainly using data size. It is a block diagram which shows the structural example in one Embodiment of the said scroll bar display control apparatus. It is a typical perspective view which shows the example of an external appearance of the said scroll bar display control apparatus.

Explanation of symbols

1 divided data size acquisition means 2 specified range data size acquisition means 3 ratio acquisition means 25 main storage (recording medium)
26 External storage (recording medium)
50 divided document data 51 divided document data 52 divided document data 53 divided document data 54 divided document data 55 divided document data 110 entire layout 111 display range 113 display range 120 scroll bar 121 scroll box

Claims (13)

From the information indicating how the document was divided, including an array of data size terms corresponding to the divided document divided into a plurality of parts in a place where the document is clearly displayed and in terms of layout, each of the divided documents A divided data size acquisition step for obtaining a data size; and
A designation corresponding to a reference position on the scroll box, which is a reference representing the position of the display range in the document, according to the position in the scroll bar of the scroll box displayed in the scroll bar for specifying the display range. A specified range data size acquisition step for specifying a divided document including a specified range specified for the document so as to include a position data position, and obtaining a data size of the specified range based on the specified divided document; ,
A ratio for obtaining a ratio of the designated range in the document from the sum of the data sizes of the divided documents obtained from the divided data size obtaining step and the data size of the designated range obtained from the designated range data size obtaining step. An acquisition step;
Scroll bar display control that uses the specified range as the display range, displays a scroll bar according to the ratio obtained from the ratio acquisition step, and controls the display content of the display range according to a user's scroll bar operation A display control method comprising: steps. The display according to claim 1 , wherein the information indicating how the document is divided includes a data size ratio that is a ratio of a data size of the divided document to a total data size of the document. Control method. The display control method according to claim 2 , wherein the information indicating how the document is divided includes a cumulative data size ratio obtained by accumulating the data size ratio . A specified range layout acquisition step of specifying a divided document including the specified position data position and acquiring a layout of the specified range based on the specified divided document;
In the specified range layout acquisition step, it is determined whether the layout of the upper and lower parts is insufficient compared to the specified range, and the layout of the specified range is acquired based on the determination result,
The display control method according to claim 1 , wherein in the scroll bar display control step, the layout of the specified range acquired in the specified range layout acquisition step is displayed as the display range . In the scroll bar display control step, when the scroll box displayed in the scroll bar for designating the display range designates a range including the start or end of the scroll bar, from the beginning of the document, The display control method according to claim 1, wherein the display is performed until the end . The display control method according to claim 1, wherein an encoded data size such as the number of bytes or the number of bits is used as the data size of the divided document and the specified range . The display control method according to claim 1, wherein a number based on a semantic unit of the divided document is used as a data size of the divided document . The display control method according to claim 7, wherein the number of characters or the number of words is used as the number based on the semantic unit . When obtaining the data size of the divided document or the specified range, if a display element whose actual display size does not correlate with the data size is included in the document, a value obtained by converting the display size of the display element to the data size is The display control method according to claim 1, wherein the display control method is used. In the scroll bar display control step, a center position of a scroll box displayed in a scroll bar for designating the display range indicates a display ratio of the center position of the display range. Item 4. The display control method according to Item 1. 2. The scroll bar display control step of changing the reference position on the scroll box and changing the designated position data position corresponding to the reference position on the scroll box together. Display control method. From the information indicating how the document is divided, including an array of data size terms corresponding to the divided document that is divided into a plurality of parts at a location that is well-defined in terms of display elements and layout, each of the divided documents A divided data size obtaining means for obtaining a data size;
  A designation corresponding to a reference position on the scroll box, which is a reference representing the position of the display range in the document, according to the position in the scroll bar of the scroll box displayed in the scroll bar for specifying the display range. A specified range data size acquisition unit that specifies a divided document including a specified range specified for the document so as to include a position data position, and obtains a data size of the specified range based on the specified divided document; ,
  A ratio for obtaining a ratio of the designated range in the document from the sum of the data sizes of the divided documents obtained from the divided data size obtaining unit and the data size of the designated range obtained from the designated range data size obtaining unit Acquisition means;
  Scroll bar display control that displays the specified range as the display range, displays a scroll bar according to the ratio obtained from the ratio acquisition means, and controls the display content of the display range according to the user's scroll bar operation A display control device. The display control program for making a computer perform each step with which the display control method as described in any one of Claims 1-11 is provided.

Images