JP4562600B2 - Document display device, document display program, and computer-readable recording medium on which document display program is recorded - Google Patents

Description

  The present invention relates to a document display device, a document display program, and a computer-readable recording medium on which the document display program is recorded, and in particular, a document display device, a document display program, and a computer on which the document display program is recorded. The present invention relates to a readable recording medium.

  In a display device, the layout is not fixed in advance, and a document whose layout dynamically changes depending on the screen of the display device or the size of characters may be displayed.

  Such document data is structured electronic data for executing predetermined processing in accordance with the definition of the document description language, and is a data format for recording a structured document having a hierarchical structure. Extensible Markup Language) is well known.

  As a method of displaying such electronic data input in the display device, there is a method as shown in FIG. That is, referring to FIG. 8, first, the data structure of input electronic data 601 is analyzed, and an analysis result 602 is obtained. Next, layout information 603 indicating where to place the parts of the electronic data 601 such as characters is created based on the analysis results and screen attributes such as screen size, margin, line spacing, and character spacing. Next, actual display image data 604 is created from the layout information and displayed on the display unit.

  In the following patent document 1 filed and filed by the applicant of the present application, layout information of only a necessary portion of display image data is created and displayed for a long document, and the screen is scrolled. A data processing method for displaying the whole is disclosed.

  Many recent document display devices that display such electronic data have high-speed processing, and display switching such as page feed can be performed at very high speed. In addition, when the user wants to display a desired portion, the user often performs a visual search while continuously performing page feed. When page turning is performed at high speed, the afterimage phenomenon of the human eye causes an illusion that the information on the previous page is also displayed on the current page, so the content of the page is longer than the actual page switching time. Confirmation is possible.

  In Patent Document 2, such a residual image phenomenon is performed by the display device itself, thereby realizing a page display method in which the content of the page can be confirmed using a longer time without changing the page switching speed.

  FIG. 9 shows an example of display using the afterimage phenomenon and its effect. Referring to FIG. 9, display screens 701 to 703 are each a display screen that displays the first page of certain document data, a display screen that displays the second page when the next page is forwarded, and a next page forward. The display screen which displays the 3rd page at the time of performing is shown.

The display screen 704 is a screen that displays the second page shown on the display screen 702, and displays the last page of the first page (display screen 701) as an afterimage on the second page. It is an example of a screen. The display screen 705 is a screen for displaying the third page shown on the display screen 703, and the display on the second page (display screen 702) immediately before the display on the third page is combined as an afterimage. It is an example of a screen to display.
International Publication No. 02/103554 Japanese Patent No. 3000978

  However, as shown in the display screens 704 and 705 in FIG. 9, the afterimage phenomenon and the page display method using the effect disclosed in Patent Document 2 increase the afterimage confirmation amount per page. As a result, the display of the previous page overlaps the current page, making it difficult to read.

  The present invention has been made to solve the above-described problems, and a purpose of the present invention is to provide a document display device and a document display program that can be viewed while grasping the contents of document data even during high-speed page feeding. And a computer-readable recording medium on which a document display program is recorded.

  In order to achieve the above object, according to one aspect of the present invention, a document display device is a document display device that displays electronic data, a page movement number storage unit that stores a page movement number, and a page movement number. Display start position determining means for determining the display start position based on the screen, layout calculation means for calculating the layout of the electronic data based on the screen attribute and the display start position, and obtaining layout information, based on the layout information Display means for displaying electronic data.

  Furthermore, the document display device preferably includes a page moving speed adjusting unit that adjusts a time interval for displaying the next page from a page with electronic data in the display unit.

  Further, it is more preferable that the page movement speed adjustment means includes means for acquiring the processing capability of the document display device, and the time interval is automatically determined based on the acquired processing capability of the document display device. .

  In addition, the display position determination unit is configured to start the predetermined page so that the object included in the predetermined page of the electronic data is laid out at a position where there is less overlap with the object included in the page displayed before the predetermined page. Is preferably determined.

  Further, the display position determining means treats a predetermined number of pages of electronic data as one set, and an object included in the first page and an object included in the first page overlap with an object included in the second page. It is preferable to determine the start position of the first page so that it is laid out in a small number of positions. It should be noted that the specific position where there is little overlap is preferably between the lines of the page immediately before the first page.

  According to another aspect of the present invention, the document display program is a program that causes a computer to display the electronic data in a document display device that displays electronic data, and stores the number of page movement times. A display start position determination step for determining a display start position based on the number of page movements, a layout calculation step for calculating layout of electronic data and obtaining layout information based on the screen attribute and the display start position, A display step of performing display based on the layout information.

  Further, it is preferable that the document display program further executes a page moving speed adjustment step of adjusting a time interval for displaying the next page from a page with electronic data in the display step.

  Further, in the display position determining step, the start of the predetermined page is performed so that the object included in the predetermined page of the electronic data is laid out at a position where there is less overlap with the object included in the page displayed before the predetermined page. Preferably the position is determined.

  Further, in the display position determination step, a predetermined number of pages of electronic data are treated as one set, and an object included in the first page and an object included in the first page overlap with an object included in the second page. It is preferable to determine the start position of the first page so that there is less layout. It should be noted that the specific position where there is little overlap is preferably between the lines of the page immediately before the first page.

  According to still another aspect of the present invention, the recording medium is a computer-readable recording medium, and records the document display program.

  The document display device, the document display method, the document display program, and the computer-readable recording medium on which the document display program is recorded according to the present invention enable the user to easily grasp the contents while switching the display at high speed. .

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a diagram showing a specific example of the configuration of the display device 1 according to the present embodiment as a specific example of the document display device according to the present invention. With reference to FIG. 1, a display device 1 according to the present embodiment specifically includes a display unit 10 that displays the content of data that is an object included in electronic data, and an operation input unit 20 that receives a user operation. It is assumed that electronic data can be received via the recording medium 30. However, the electronic data may be stored in a ROM (Read Only Memory) of a display device (not shown) or may be received via a network.

  Specifically, the document display device according to the present invention is realized by a personal computer, a game machine, an electronic book viewer, an electronic dictionary, and a PDA (Personal Digital Assistants) having a plurality of display units. It may be realized with.

  FIG. 2 is a block diagram illustrating a specific example of a functional configuration of the display device 1 according to the present embodiment. The function shown in FIG. 2 is that a CPU (Central Processing Unit) of the display device 1 (not shown) reads and executes a program stored in a storage device such as a ROM, a RAM (Random Access Memory), or an HD (Hard Disc). It is a function that is demonstrated in

  Referring to FIG. 2, display device 1 has a data input unit 102 that reads electronic data 101 recorded from a recording medium such as an external flash memory and inputs data as a functional configuration before processing the data. The data structure analyzing unit 103 that analyzes the data structure of the electronic data 101 and the operation input unit 108 that receives a user operation are configured. In the present embodiment, the electronic data 101 is assumed to be data in XML (Extensible Markup Language) format.

  Further, as a functional configuration for processing data, a layout calculation unit 104, a display image data creation unit 105, a display memory 106, a display unit 107, a user instruction processing unit 109, a display control unit 110, The display start position specifying unit 111 and the page movement number storage unit 112 are included.

  The data input unit 102 corresponds to an external flash memory slot or the like. The electronic data 101 recorded from a recording medium such as an external flash memory is read and input to the data structure analysis unit 103. The data structure analysis unit 103 analyzes the data structure of the electronic data input from the data input unit 102 and inputs the analysis result to the layout calculation unit 104.

  The operation input unit 108 corresponds to a button, a mouse, or the like, and inputs an operation signal to the user instruction processing unit 109 according to a user operation. The user instruction processing unit 109 analyzes the operation signal input from the operation input unit 108 and inputs the instruction signal to the display control unit 110 as necessary.

  The display control unit 110 acquires information on the display start position from the display start position determination unit 111 based on the instruction signal input from the user instruction processing unit 109, and sends the display calculation unit 104 the screen display area size and the like. Passes along with the attributes to request layout calculation. Further, when it is necessary to adjust the speed of continuous page movement, the movement to the next page is temporarily stopped for the page movement speed adjustment time.

  In response to a layout calculation request from the display control unit 110, the layout calculation unit 104 performs layout calculation based on the analysis result input from the data structure analysis unit 103 and the screen attributes input from the display control unit 110. Then, layout information is generated. The layout calculation refers to the position and shape of parts for creating display data for displaying the display screen 604 on the display unit 10 in accordance with the structure of the electronic data 601 as previously described with reference to FIG. Is obtained.

In the layout calculation unit 104, as a specific layout calculation method using an engine for drawing one screen,
(1) Page feed layout calculation: a layout calculation method employed in page feed processing, which calculates a layout that displays the next character after the last character of the current layout information on the screen as the first line;
(2) Layout calculation for page return: a layout calculation method employed in page return processing, a method for calculating a layout in which the character before the first character of the current layout information is displayed on the last line of the screen, and 3) Re-layout calculation: A method to calculate the layout according to the screen settings such as the size of the display destination screen without changing the display head character.
The layout calculation unit 104 calculates a layout using a necessary calculation method according to a control signal input from the display control unit 110, and generates layout information. At that time, the display position in the sub-scanning direction of the first row is adjusted using the start position adjustment value which is one of the attributes received from the display control unit 110. The layout information generation method other than the adjustment of the display start position of the first row is the same as a general generation method disclosed in, for example, Patent Document 1 described above.

  The display image data creation unit 105 creates display image data to be displayed on the display unit 107 from the layout information calculated by the layout calculation unit 104 and develops it in the display memory 106. The display image data developed in the display memory 106 is displayed on the display unit 107.

  The display start position determination unit 111 obtains a display start position adjustment value based on the number of page movements obtained from the page movement number storage unit 112 and inputs it to the display control unit 110.

The page movement number storage unit 112 stores the number of page movements.
FIG. 3 is a flowchart showing the continuous page feed process in the display device 1 according to the present embodiment. The processing shown in the flowchart of FIG. 3 is realized by the CPU of the display device 1 (not shown) reading out and executing a program stored in the storage device and controlling each unit shown in FIG.

  Referring to FIG. 3, when the process of continuously performing page turning is started, continuous page movement that is the number of times of continuous page movement stored in page movement number storage unit 112 in step S401. The number of times is initialized to 0, and the process proceeds to step S402.

  In step S402, the display start position determination unit 111 determines a start position adjustment value based on the number of continuous page movements, and the process proceeds to step S403. A specific start position adjustment value will be described later.

  In step S403, the layout calculation unit 104 performs page feed layout calculation based on the start position adjustment value obtained in step S402 and the screen attribute to obtain layout information, and the process advances to step S404. Details of the layout calculation will be described later.

In step S404, if the page movement speed adjustment time is instructed in the display control unit 110, the designated time processing is temporarily stopped here, and the process proceeds to step S405. In the case of a display device having a CPU with a high processing speed, there are cases where continuous page feed is too fast and difficult to check visually, and page movement speed adjustment time is required. The page moving speed adjustment time may be set in advance, may be instructed by the user, may be obtained from a preset page turning interval time, or may be instructed by the user. It may be determined from the turning interval time. In the case of obtaining from the page turning time interval, it is preferable that the page moving speed adjustment time is determined as follows.
(Page moving speed adjustment time) = (Interval time set for turning pages) − (Time required for S405, S406, S407, S402, S403)
The time required for S405, S406, S407, S402, and S403 is set to 0, for example, at the first page turning (when the number of continuous page movements is 0), and thereafter, the time required for the immediately preceding S405, S406, S407, S402, and S403. Time should be used.

  However, when the page movement speed adjustment time is negative in the above formula, that is, when the capability of the device is low, the page movement speed adjustment time is set to zero.

  In addition, when it is known in advance that the processing speed of the CPU mounted on the display device is slow, the process of step S404 may be skipped.

  In step S405, the display image data creation unit 105 creates display image data from the layout information obtained in step S403, develops it in the display memory 106, and displays it on the display unit 107.

  In step S406, if the instruction from the user instruction processing unit 109 is to continue the continuous page feed process, the process proceeds to step S407, and if the end instruction is received, the process proceeds to step S408.

  In step 407, 1 is added to the number of continuous page movements stored in the page movement number storage unit 112, and the process proceeds to step S402.

  In step S408, the layout calculation unit 104 performs a re-layout calculation based on the screen attributes with the start position adjustment value set to 0, and acquires layout information. The process then proceeds to step S409.

  In step S409, the display image data creation unit 105 creates display image data from the layout information obtained in step S408, develops it in the display memory 106, and displays it on the display unit 107. The process ends here.

  Since the start position is adjusted in steps S402 and S403, the display differs from the conventional display in which the start position is not adjusted. Therefore, in step S408 and step S409, processing for returning to the conventional display is performed. If it is not necessary to return to the conventional display, Steps 408 and 409 are unnecessary.

  Here, an example of continuous page feed processing has been shown, but in the case of continuous page return processing, it can be similarly realized by performing page return layout calculation instead of page feed layout calculation in step S402.

  Here, the number of page movements is the number of page feeds after the continuous page feed process is performed. However, if it is not necessary to return the start position adjusted as described above, the page after opening the electronic data is used. It may be the number of feeds.

  4 and 5 are diagrams showing specific examples of the start position adjustment value required in step S402.

  FIG. 4 is a diagram illustrating an example of the start position adjustment value when adjusting the display start position with two pages as one set, that is, when the immediately preceding page is displayed as an afterimage. In this case, in step S402, when the number of continuous page movements is a multiple of 2, the start position adjustment value is 0, and when the number of continuous page movements is (a multiple of 2 + 1), ((character size + line spacing size) / 2. ).

  By determining such a display start position in step S402, the center between the lines of the page where the number of continuous page movements is a multiple of 2 matches the center of the character of the page of (multiple of 2 + 1). Therefore, even if the previous page is displayed with the current page as an afterimage when the page is turned, the display of the previous page is located between the lines of the current display, and display that does not interfere with the display of each other's page is possible It becomes. Depending on the overlap of characters due to the character size and the size between lines, this makes it possible to identify characters even when page feed is performed at a speed about twice that of the conventional method.

  FIG. 5 shows an example of the start position adjustment value when the display start position is adjusted with 3 pages as one set, that is, when the previous 2 pages are displayed as afterimages. In this case, the characters can be identified even if page feed is performed at a speed about three times that of the conventional method.

  In this way, when the display start position is adjusted with N pages as one set, that is, when the previous (N-1) pages are displayed as afterimages, (N × x + y) pages (where x is a non-negative integer, y Is preferably a non-negative integer less than N) (y × (character size + line spacing size) ÷ N). Here, it is possible to increase N, but the line spacing size is often smaller than the font size. Therefore, increasing N increases the overlap of characters and reduces the effect of the present invention.

  As shown in FIGS. 4 and 5, a table that prescribes the correspondence between the number of continuous page movements and the start position adjustment value as a set for each page number for adjusting the display start position is a storage device such as a ROM. In step S402, the display start value determination unit 111 refers to the table to obtain the correspondence between the number of continuous page movements and the start position adjustment value, and the display start position may be determined. The display start value determination unit 111 may calculate the start position adjustment value by using an expression for calculating the start position adjustment value (y × (character size + line spacing size) ÷ N).

  FIG. 6 is a diagram for explaining the layout calculation in consideration of the start position adjustment value, which is executed in step S403. Here, the character size is 12, the line spacing size is 8, and horizontal writing is assumed.

  A display screen 501 is a display screen when the start position adjustment value is zero. The drawing start position coordinate of “A”, which is the first display start character, is (0,0), and the drawing start position coordinate of “I” of the next character is (12,0) due to the character size 12. Further, the drawing start position coordinate of “sa” as the first character in the second line is (0, 20) due to the character size 12 and the line spacing size 8.

  A display screen 502 is a display screen for the second page when the display start position is adjusted with two pages as one set. In this case, the start position adjustment value is determined to be 10 in step S402 by the calculation formula shown in FIG. As a result, the drawing start position coordinates of “a”, which is the first character of the display start, are (0, 10) for adjusting the start position in the sub-scanning direction (here, the horizontal writing is the Y-axis direction). Similarly, the drawing start position of “i” of the next character is (12, 10) due to the character size 12. Similarly, the drawing start position coordinate of “sa” as the first character in the second line is (0, 30) by the start position adjustment value 10, the character size 12, and the line spacing size 8.

  FIG. 7 is a diagram showing a specific example of a display screen that displays document data when the continuous page feed process is executed in the display device 1 according to the present embodiment. The display screen shown in FIG. 7 shows a specific example in which the character size is 12 and the line spacing size is 8, and the display start position is adjusted with 2 pages as one set.

  Referring to FIG. 7, display screen 301 represents a display screen that displays the first page of document data. In step S402, the start position adjustment value is determined to be 0, and the drawing start position coordinate of “a”, which is the first character of the display start, is (0, 0).

  The display screen 302 is a display screen that displays the second page by feeding the next page. In step S402, the start position adjustment value is determined to be 10, and the drawing start position coordinates of “a”, which is the first character of the display start, are (0, 10).

  The display screen 303 is a display screen that displays the third page by further feeding the next page. In step S402, the start position adjustment value is determined to be 0, and the drawing start position coordinates of “A”, which is the first display start character, are (0, 0).

  The display screen 304 is a screen that displays the second page shown in the display screen 302, and the display of the screen (display screen 301) of the immediately preceding first page is displayed with an afterimage effect between the display lines of the second page. This is an example screen. In addition, the display screen 305 is a screen that displays the third page shown on the display screen 303, and the display of the immediately preceding second page (display screen 302) is an afterimage effect between the display lines of the third page. It is an example of a displayed screen.

  By determining the start position adjustment value in the display device 1 according to the present embodiment, even if the immediately preceding page is displayed with the afterimage effect, the immediately preceding page is displayed with the afterimage effect between the rows of the current page. The For this reason, confirmation of information on the current page is not hindered by the afterimage, and information on the previous page can be confirmed together with information on the current page.

  Although an example of horizontal writing is shown here, in the case of vertical writing, the display start position is adjusted in the sub-scanning direction, and thus is performed in the X-axis direction.

  So far, the example in the case where the electronic data is structured data has been shown, but even when the character size and the line spacing size are determined, or when displaying plain text on a display device that can be specified by the user, This can be realized by setting a different display start position for each page.

  Further, when displaying a plurality of image data having the same pattern, it can be realized by setting different display start positions for each page.

  Furthermore, a continuous page feed processing method or a continuous page return processing method executed by the above-described display device can be provided as a program. Such a program is recorded on a computer-readable recording medium such as a flexible disk attached to the computer, a CD-ROM (Compact Disc-Read Only Memory), a ROM, a RAM, and a memory card, and provided as a program product. You can also. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built in the computer. A program can also be provided by downloading via a network.

  The provided program product is installed in a program storage unit such as a hard disk and executed. The program product includes the program itself and a recording medium on which the program is recorded.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the specific example of a structure of the display apparatus 1 concerning this Embodiment. It is a block diagram which shows the specific example of a function structure of the display apparatus 1 concerning this Embodiment. 5 is a flowchart showing a continuous page feed process in the display device 1 according to the present embodiment. It is a figure which shows the specific example of the starting position adjustment value for every page at the time of making 2 pages into 1 set. It is a figure which shows the specific example of the starting position adjustment value for every page at the time of making 3 pages into 1 set. It is a figure explaining the layout calculation for every page at the time of making 2 pages into 1 set. It is a figure which shows the specific example of the display with the display apparatus 1 concerning this Embodiment. FIG. 10 is a diagram illustrating processing for displaying a document whose layout dynamically changes in a display device of a conventional example. It is a figure explaining the afterimage effect in the page feed process in the display apparatus of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Display apparatus, 10 Display part, 20 Operation input part, 30 Recording medium, 101,601 Electronic data, 102 Data input part, 103 Data structure analysis part, 104 Layout calculation part, 105 Display image data creation part, 106 Display memory , 107 Display unit, 108 Operation input unit, 109 User instruction processing unit, 110 Display control unit, 111 Display start position designation unit, 112 Page movement number storage unit, 301 to 305, 701 to 705 Display screen, 602 Analysis result, 603 Layout information, 604 display image data.

Claims (10)

A document display device for displaying electronic data,
A page movement frequency storage means for storing the page movement frequency;
Based on the number of page movements, the amount of deviation of the display start position, which is the start position of the page to be displayed on the display screen, in the direction orthogonal to the line direction on the display screen from the display start position on the display screen , Display start position determining means for determining an adjustment value that is a deviation amount within a unit width in a direction orthogonal to the direction of the row of the display screen defined in advance on the display screen;
Layout calculation means for calculating layout of the electronic data and acquiring layout information based on the attribute of the display screen and the adjustment value;
Display means for performing processing for displaying the electronic data on the display screen based on the layout information;
The display position determining means determines the adjustment value for the second page when the page displayed by the electronic data moves from the first page to a second page adjacent to the first page. A document display device that determines a value different from the adjustment value for the first page. The adjustment value determined by the display start position determination unit is an integral multiple of a value obtained by dividing a unit width in a direction orthogonal to the direction of the row of the display screen by the number of pages having an adjustment unit. Item 2. The document display device according to Item 1. The adjustment value determined by the display start position determination means is obtained by dividing the unit width in the direction orthogonal to the direction of the row of the display screen by the number of pages having the adjustment unit as the number of page movements. The document display device according to claim 2, wherein the document display device is a value obtained by multiplying the remainder by dividing the number by the number of pages having the adjustment unit.   The document display device according to claim 1, wherein the page movement number storage unit stores a continuous page movement number. From the preset page turning interval time, which is a time for the display screen to change from the first page to the second page, the display start position determining means, the layout calculating means, and the display means When the adjustment time obtained by subtracting the processing time at the time and the processing time for saving in the page movement number storage means is a positive value, the second page is displayed on the display screen based on the adjustment time. The document display device according to claim 1, further comprising a page moving speed adjusting unit for adjusting a display timing. A program for causing a computer to display electronic data,
The computer includes storage means for storing the number of page movements;
Receiving an instruction to move a page to be displayed on the display screen from the first page of the electronic data to a second page adjacent to the first page;
Updating the page movement count stored in the storage means;
Based on the number of page movements, the amount of deviation of the display start position, which is the start position of the second page on the display screen, in the direction orthogonal to the line direction on the display screen from the display start position of the display screen. A display start position determining step for determining an adjustment value that is a deviation amount within a unit width in a direction orthogonal to the direction of the row of the display screen defined in advance on the display screen;
A layout calculation step of calculating layout of the second page of the electronic data and obtaining layout information based on the attribute of the display screen and the adjustment value;
A display step of displaying the second page on the display screen based on the layout information;
The document display program, wherein the display position determining step determines the adjustment value for the second page as a value different from the adjustment value for the first page. The adjustment value determined in the display start position determination step is an integer multiple of a value obtained by dividing the unit width in the direction orthogonal to the direction of the row of the display screen by the number of pages with the adjustment unit. The document display program according to claim 6. The adjustment value determined in the display start position determination step is a value obtained by dividing the unit width in the direction orthogonal to the direction of the row of the display screen by the number of pages having the adjustment unit. The document display program according to claim 7, wherein the document display program is a value obtained by multiplying a remainder when dividing the number of times by the number of pages as the adjustment unit.   Updating the page movement count from a preset page turning interval time, which is a time required for the display on the display screen to change from the first page to the second page, and the display start position determining step. When the adjustment time obtained by reducing the processing time in the layout calculation step and the display step is a positive value, the timing for displaying the second page on the display screen is adjusted based on the adjustment time. The document display program according to claim 6, further causing a page moving speed adjustment step to be executed.   A computer-readable recording medium for recording the document display program according to claim 6.

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