JP5201025B2 - Document display device, document display method and program, and storage medium - Google Patents

Description

  The present invention relates to a document display device that detects a page position of a document image, a document display method, a program thereof, and a storage medium.

  There is software that can provide explanations and supplementary explanations by overwriting on a document displayed by a document display program. This is just drawing on the document image, and if there is no association with the document position and only the overwrite data is saved, it is always meaningful to redraw if it is not displayed at the same document position as when overwriting. On the contrary, it is misleading. Therefore, it is necessary to accurately detect the display position of the original document and the overwritten one.

  Conventionally, a technique for detecting a display position of a document in an application having a drag scroll function has been proposed. For example, Patent Document 1 proposes a technique for adding page information to a document for printing, automatically detecting the page information, and matching the overwritten portion with the page. Patent Document 2 proposes a method of directly overwriting data on an image memory. Patent Document 3 proposes a technique for separately storing a PC image and handwritten information at the time of overwriting, and displaying them in a superimposed manner at the time of display. In this technique, the positional relationship between the image and the overwrite is unknown, and it is necessary to manage the display position of the image and the overwrite in association with each other.

  However, the technique of Patent Document 1 requires a special device that additionally prints page information once and further identifies the page information. In the technique of Patent Document 2, the overwrite position information is held and displayed at the time of enlargement / reduction display and scroll display, but this information disappears once the display is changed by the APL. Further, since the same image is re-displayed by APL, and information such as a display position and a display magnification is not possessed, the overwritten data cannot be aligned and displayed. In the technique of Patent Document 3, the positional relationship between an image and overwriting is unknown, and it is necessary to manage the display position of the image and overwriting in association with each other. As described above, various techniques have been proposed but have the above-mentioned problems.

  By the way, as a method in which another annotation (overwrite) program scrolls and displays a document displayed by a document program operating on a general-purpose OS (MS Windows (registered trademark), MAC OS, Linux (registered trademark), etc.) It is common to send a scroll message (for example, SendMessage (WM_VSCROLL, SB_LINEUP, (LPARAM) hScroll) in a Windows (registered trademark) environment) to the program by an API (application program interface) provided by the OS. . However, an API for acquiring the scroll length is not generally provided, and in order to know the document display position, it is necessary to use a special method to acquire the scroll length when the document is scroll-displayed.

  Generally, the portion that remains displayed after scrolling is not redrawn, and the image that remains in the scroll direction is moved. At this time, the straight line moves together. For this reason, when a transparent window is displayed on the document, a straight line is drawn on the transparent window and scrolled, the straight line moves by the same amount as the document. Therefore, in this method, the scroll length can be acquired by detecting the position of the straight line after the movement.

  However, some of them redraw the entire display area unlike the above. In this case, the straight line is deleted and the scroll length cannot be obtained. In this case, it is possible to acquire the scroll length by detecting a specific document image in the image and detecting the movement amount of the specific document image after executing the scroll.

  However, in general documents, there is a document configuration in which nothing is drawn on the display portion. If such a blank page exists and the entire display area is redrawn at the time of scrolling, the scroll length cannot be detected. Therefore, there has been a need for a method for accurately displaying a document display position for an arbitrary application. In addition, there is a problem that if the screen display greatly flows when scrolling, it will be harmful to the viewer.

  The present invention has been made in view of the above, and makes it possible to accurately detect the document position of a document displayed by an arbitrary application program having a drag scroll function, and to change the display state of a screen that greatly flows during scrolling. The goal is to improve.

  In order to solve the above-described problems and achieve the object, the document display apparatus of the present invention can display a document displayed by an arbitrary document application program operating on a general-purpose OS by emulating a drag scroll operation on the document. A document display device that performs scroll display, an image acquisition unit that acquires a document image excluding a partial region of the original document image, and a first that displays the acquired document image on the display unit so as to overlap the original document image. Display control means, position detection means for detecting the display document position of the original document image at the time of scrolling based on the amount of movement by dragging the scroll bar displayed on the display means, and erasing the displayed document image And a second display control means for displaying the original document at the detected display document position on the display means.

  The document display method of the present invention is a document display method for scrolling and displaying a document displayed by an arbitrary document application program operating on a general-purpose OS by emulating a drag scroll operation on the document. An image acquisition step of acquiring a document image excluding a partial area of the document image, a first display control step of displaying the acquired document image on the display unit so as to overlap the original document image, and the display unit A position detecting step for detecting the display document position of the original document image at the time of scrolling based on the amount of movement by dragging the scroll bar; and erasing the document image displayed in an overlapping manner, and detecting the original of the detected display document position And a second display control step for displaying the document on the display means.

  According to the present invention, since the display document position is detected based on the amount of movement by dragging the scroll bar, it is possible to accurately detect the document position of the document displayed by any application program having a drag scroll function. In addition, since the document image excluding a part of the original document image is displayed so as to overlap the original image, it is possible to improve the display state of the screen that flows greatly during scrolling.

FIG. 1 is a block diagram showing a configuration of a document display apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a usage form of the document display device. FIG. 3 is a diagram for explaining an application example of document display in which the document position detection method according to the present embodiment is effective. FIG. 4 is a diagram for explaining a drag scroll emulation method. FIG. 5 is a diagram for explaining the scroll bar information. FIG. 6 is a diagram for explaining the document position acquisition procedure. FIG. 7 is a flowchart showing a document position detection control flow. FIG. 8 is a diagram illustrating an example of the position detection control table. FIG. 9 is a flowchart showing an initialization control flow at the time of document position detection. FIG. 10 is a flowchart showing a document vertical position detection control flow. FIG. 11 is a flowchart showing a document horizontal position detection control flow.

  Embodiments of a document display device according to the present invention will be described below in detail with reference to the accompanying drawings.

(Embodiment)
FIG. 1 is a block diagram showing a configuration of a document display device 100 according to an embodiment of the present invention. As shown in the figure, the hardware configuration of the document display device 100 includes a control unit 110 having a CPU and a memory (not shown), a memory for storing various data, and an HDD (Hard Disk Drive). The storage unit 120 includes an input unit 130 that receives an operation input by a user, and a display unit 140 as a display unit that displays a document or the like on the screen.

  The application 111 is software for displaying a document on the display unit 140 or creating a document while displaying the document on the display unit 140. For example, Word (R) of Microsoft Corporation (R), Adobe, or the like is used. (R) Acrobat Reader (R) and the like are applicable. Here, the document image includes document data such as a document image in which characters and the like are represented as an image and an electronic document created by a document creation application. A document image generally includes one or more pages.

  The document display program that is the core of this embodiment includes an image acquisition unit 112, a display control unit 1 113, a position detection unit 114, and a display control unit 2 115. The image acquisition unit 112 has a function of acquiring a document image obtained by excluding a partial area (any end, particularly, the right end or the lower end) from the document image displayed by the application 111. The display control unit 1 113 displays the document image acquired by the image acquisition unit 112 on the document image (original document image) displayed on the display unit 140 by the application 111 so that the original document image is hidden. Take control. The position detection unit 114 detects the document display position when the drag scroll is performed. At that time, a position detection control table is created and stored in the storage unit 120. Details of processing for detecting a document display position by the position detection unit 114 will be described later. After the drag scroll is finished, the display control unit 2 115 deletes the document image displayed by the display control unit 1 113 and displays the original document image by the application 111 after the drag scroll on the display unit 140. .

  As a usage form of the document display device 100 configured as described above, a form as shown in FIG. 2 can be exemplified.

  FIG. 1A shows a form using a general PC (personal computer) including a mouse / tablet, a keyboard, and a display. In this embodiment, the correction contents are drawn on a document created by a general document creation application such as Office software, and the correction contents are stored in association with the document position. The document correction is performed by displaying and referring to the setting / correction contents in the document display state at the time of document correction or drawing.

  In addition, what is shown in FIG. 5B is a form in which the screen of a notebook PC or tablet PC can be displayed on a projector. In this form, the voice of the speaker at the time of projector display and the memo drawing on the document are stored in association with the document position in time series. Then, for the purpose of confirmation by a non-conference participant or reconfirmation by a party, the same document display state is reproduced on an arbitrary PC.

  Also, what is shown in FIG. 5C is a form in which a plurality of PCs are connected via a network. In this mode, by making the display states of other PCs the same, the document contents are shared on the screen and a meeting is held.

  Here, with reference to FIG. 3, an application example of document display in which the document position detection method described later is effective will be described. FIG. 3 is a diagram for explaining an application example of document display in which the document position detection method according to the present embodiment is effective.

  A full-screen transparent window with a transparent background is displayed on a document displayed by an arbitrary application.

  Then, drawing is performed at an arbitrary position on the document (FIG. 3: (2) portion). At this time, the document position (DY: first page top origin, DX: page left origin) of the displayed document is detected, and the drawing position (DX + X-WX, DY + Y-WY) is stored as associated annotation data (overwrite data). To do. Note that the upper left corner coordinates (WX, WY), the document area width (WW), and the document area height (WH) are acquired by an API provided by the OS. The drawing position is acquired from the mouse by coordinates (X, Y).

  Next, a sticky note window associated with the drawing area is displayed, and a supplementary explanation or the like is input.

  The display position of the annotation-executed document is automatically detected, and if there is an annotation (portion (4) in FIG. 3) on the display document, it is redrawn at the drawn document position.

  By double-clicking on the drawing, a sticky note window (FIG. 3: (5) portion) is displayed, and a supplementary explanation document is displayed.

  Through the above procedure, it becomes possible to artificially write a supplementary explanation or the like to a document such as a correction instruction of a created document or a manual without changing the original document. When drag scrolling is performed for such a document display, the following is performed.

(Drag scroll emulation)
Hereinafter, a drag scroll emulation method executed at the time of document position detection will be described with reference to FIG. 4 using an example using an API of MS Windows (registered trademark). Here, a case will be described in which the rightmost 1 line and the lowermost 1 line are implemented as a scroll area (an area for actual scroll display).

(1) When a drag scroll operation (that is, an operation to turn the left mouse button ON → scroll bar drag → left button OFF) is continuously executed, if a large screen display flows, the viewer's mood may be harmed. Become. In order to avoid this, before executing the drag scroll, a document image in an area excluding one line in the vertical direction at the right end of the document area is acquired and displayed in the same position (FIG. 4A: part (1)). As a result, only the rightmost line is scrolled during drag scroll emulation.

(2) Next, the mouse cursor is moved to one line on the right end (X0, Y0), and the mouse left button ON operation is emulated (FIG. 4A: (2)). At this time, the following API is used.
:: SetCursor (X0, Y0); (Moving API)
:: mouse_event (MOUSEEVENT_LEFTDOWN, 0,0,0,0); (Left button ON API)

(3) Next, the left button ON drag operation from (X0, Y0) to (X1, Y1) is emulated (FIG. 4 (A): (3)). At this time, the following API is used.
:: mouse_event (MOUSEEVENT_MOVE, 0, X1-X0,0,0); (Drag API)
:: mouse_event (MOUSEEVENT_LEFTUP, 0,0,0,0); (Left button OFF API)

(4) After completion of the drag scroll emulation, if the display image superimposed in (1) is deleted, the moved document image is displayed (part (4) in FIG. 4B). The vertical scroll length at this time is (Y0-Y1).

(5) Similarly, a document image in an area excluding the one line at the lower end of the document display area is acquired and displayed in an overlapping manner at the same position. Then, in the same manner as described above, the left button ON drag operation from (X2, Y2) to (X3, Y3) is emulated, and scroll display is performed in the horizontal direction (FIG. 4C: (5)). . The horizontal scroll length at this time is (X3−X2).

(Scroll bar information)
Here, the scroll bar information will be described with reference to FIG. FIG. 5 is a diagram for explaining the scroll bar information.

(1) In FIG. 5A, vertical scroll bar information (vMax, vBox, vPage) of a vertical scroll bar (FIG. 5A: (1)) in an arbitrary application program is acquired by an API provided by the OS. The

(2) In FIG. 5A, the horizontal scroll bar information (hMax, hBox, hPage) of the horizontal scroll bar (FIG. 5A: (2)) in an arbitrary application program is acquired by the API provided by the OS. The

  FIG. 5B shows the relationship between the values indicated by the scroll bar information. Specifically, it is as shown in the following table.

(Document position information acquisition procedure)
Next, the document position acquisition procedure will be described with reference to FIG. FIG. 6 is a diagram for explaining the document position acquisition procedure.

  In order to detect the document position of the display document, it is necessary to move to the upper end of the first page and repeat drag scroll emulation to the display position. However, if this is executed each time the document is scrolled, it takes time for detection and lacks practicality. In order to avoid this, the document position at the start of annotation is detected, a vertical position information table is created, and the document position is calculated based on this. The horizontal position of the document depends on the page width, and is detected when the page width changes, and a horizontal position information table is created.

(1) Move to the position of “vBox = 0” by the API provided by the OS (FIG. 6A: (1)). As a result, the top end (P1) of the first page is displayed at the top end of the document area.

(2) The downward drag scroll emulation is repeated with the document start position as the document vertical position “0”, and the mouse movement amount (Y1-Y0) (FIG. 6A: (2)) by dragging is added to the document vertical position. . Then, the vertical scroll bar information “vertical scroll box position (vBox)” at this time is acquired, and the following vertical position information table is created.

(3) Then, when (vBox + vPage)> vMax (at this time, the document moves to the last page and there is no document in the downward direction) (FIG. 6B: (3)), the above processing is terminated.

(4) Similarly, in order to detect the horizontal position of the document, it is moved to the position “hBox = 0” by the API provided by the OS. As a result, the left edge of the page is displayed.

(5) The right drag scroll emulation is repeated with the left end position of the document as the document horizontal position “0”, and the mouse movement amount by dragging is added to the document horizontal position. Then, the horizontal scroll bar information “horizontal scroll box position (hBox)” at this time is acquired, and the following horizontal position information table is created.

(6) Then, when (hBox + hPage)> hMax, the above process is terminated.

(7) The vertical document position at the upper end of the display area when “24” is acquired as the vertical scroll box position is calculated as follows.

  Document vertical position = (256-128) * (24-16) ÷ (32-16)

(Document position detection control flow)
Next, document position detection control will be described with reference to FIGS. FIG. 7 is a flowchart showing a document position detection control flow. FIG. 8 is a diagram illustrating an example of the position detection control table.

  The document position detection control is executed as a function of an application program in which the document position detection is effective. Here, the document in the upper left corner of the document display area having the upper end of the first page as the origin of the vertical position of the document and the left end of the page as the origin of the horizontal position of the document Detect position. The position detection control table (FIG. 8) created below is created at a location accessible from all modules.

  "Initialization control" is executed once at the start of document position detection (in this case, it is determined Yes in the initialization determination in step S701), and the initialized vertical position information table and horizontal position information table are created (step S1). S702). At the start of the second and subsequent document position detection (in this case, it is determined No in the initialization determination in step S701), the “initialization control” is skipped and the process proceeds to the next “horizontal scroll bar information acquisition”.

  Horizontal scroll bar information (hBox, hPage, hMax) is acquired by an API provided by the OS by “horizontal scroll bar identification” (window handle in the case of MS Windows (registered trademark)) (step S703).

  If the “horizontal scroll width” of the position detection control table and the acquired value “hMax” are different (Yes in step S704), “document horizontal position detection control” is executed assuming that the page size has changed, and the horizontal position information table is updated. Create (step S705). On the other hand, if the “horizontal scroll width” and the acquired value “hMax” are the same (No in step S704), the “document horizontal position detection control” is skipped, and the process proceeds to the next “document horizontal position calculation”.

  In the “document horizontal position calculation”, the horizontal position information table is searched from the acquired “hBox” and the document horizontal position is calculated (using the same method as the calculation of the vertical document position in the document position information acquisition procedure (7)) ( Step S706).

  Next, vertical scroll bar information (vBox, vPage, vMax) is acquired by API provided by the OS by “vertical scroll bar identification” (window handle in the case of Windows (registered trademark) environment) (step S707).

  Then, the vertical position information table is searched from the acquired “vBox”, and the document vertical position is calculated (by the method of calculating the vertical document position in the document position information acquisition procedure (7)) (step S708).

  The caller is notified of the vertical document position and horizontal document position acquired as described above.

(Initialization control flow)

  Here, initialization control at the time of document position detection in the document position detection control flow of FIG. 9 will be described with reference to FIGS.

  The window of the application program that displays the document is searched by the API provided by the OS, the window upper left coordinates (WX, WY), the window width (WW), the window height (WH) are searched, and the area (WW × WH). The window having the largest value is set as the document area window (see the part (1) in FIG. 3) (step S901).

  The detected document area window identification (in the case of MS Windows (registered trademark): window handle) is stored in the position detection control table (step S902).

  Next, the vertical scroll bar is searched by the API provided by the OS, and the one closest to the document area is set as the vertical scroll bar of the document (step S903).

  Then, the detected vertical scroll bar identification (window handle in the case of MS Windows (registered trademark)) is stored in the position detection control table (step S904).

  Next, the horizontal scroll bar is searched by the API provided by the OS, and the one closest to the document area is set as the horizontal scroll bar of the document (step S905).

  Then, the detected horizontal scroll bar identification (window handle in the case of MS Windows (registered trademark)) is stored in the position detection control table (step S906).

  Next, horizontal scroll bar information (hBox, hPage, hMax) is acquired (step S907).

  Then, the horizontal scroll width (hMax) of the display page is stored in the position information control table (step S908).

  Next, the following “document vertical position detection control” is executed, and a vertical position information table (Table 2) is created by associating the document vertical position with the vertical scroll box position (step S909).

  Further, “document horizontal position detection control” described later is executed to create a horizontal position information table (Table 3) by associating the document horizontal position with the horizontal scroll box position (step S910).

(Document vertical position detection control)
Next, document vertical position detection control will be described with reference to FIG. FIG. 10 is a flowchart showing a document vertical position detection control flow. Here, the scroll area is described as the right end of the document area.

  First, the upper left end (WX, WY), width (WW), and height (WH) of the document area are acquired from the document area identification, and an image of the area excluding one line at the right end of the document area is acquired (see FIG. 3B). (Step S1001).

  Then, the acquired image is displayed over the original document (step S1002).

  Next, vertical scroll bar information (vBox, vPage, vMax) is acquired from the vertical scroll bar identification (window handle in the case of Windows (registered trademark) environment) (step S1003).

  Then, the vertical scroll box position (vBox) indicating the current vertical display position is stored (step S1004).

  Next, the top page of the document is displayed by moving to the position of the vertical scroll box position “0” by the API provided by the OS (step S1005).

  Then, the vertical position number “0”, the vertical scroll box position “0”, and the vertical document position “0” are set in the vertical position information table (steps S1006 to S1008), and are stored as the vertical position information (step S1009).

  Then, 1 is added to the number of vertical positions (step S1010).

  Next, vertical scroll bar information (vBox, vPage, vMax) is acquired from the vertical scroll bar identification (window handle in the case of Windows (registered trademark) environment) (step S1011).

  At this time, when there is no downward document (that is, vBox + vPage> vMax) (No in step S1012), the process proceeds to step S1021.

  On the other hand, if there is a downward document, the cursor is moved to the drag scroll start position (X, Y) by the following API provided by the OS (step S1013).

X = WX + WW-1
Y = WY + WH-1
:: SetCursorPos (X, Y);

Next, the left mouse button ON is notified to the document application by the following API provided by the OS (step S1014).
:: mouse_event (MOUSEEVENT_LEFTDOWN, 0,0,0,0);

Then, the document application is notified of the left button ON drag by the following API provided by the OS (step S1015). The drag length is set to about “256” (+ value: upward scroll, −value: upward scroll).
:: mouse_event (MOUSEEVENT_MOVE, 0, -drag length, 0,0);

Further, the left button OFF is notified to the document application by the following API provided by the OS (step S1016).
:: mouse_event (MOUSEEVENT_LEFTUP, 0,0,0,0);

  Then, the drag length is added to the vertical document position (step S1017).

  Next, vertical scroll bar information (vBox, vPage, vMax) after drag scrolling is acquired (step S1018).

  Then, the vertical scroll box position is set to “vBox” (step S1019).

  The document vertical position and the vertical scroll box position are stored as vertical position information in an area corresponding to the number of vertical positions in the vertical position information table (step S1020). Then, the processing from steps S1010 to S1020 is repeated until there are no more downward documents.

  When there is no lower document (Yes in step S1012), the vertical scroll box position is moved to the position acquired in step S1004 by the API provided by the OS, and the document is returned to the original position (step S1021).

  Finally, the document image superimposed and displayed in step S1002 is deleted, and the original document at the vertical scroll box position is displayed (step S1022).

(Document horizontal position detection control)
Next, document horizontal position detection control will be described with reference to FIG. FIG. 11 is a flowchart showing a document horizontal position detection control flow. Here, the scroll area is described as the lower end of the document area.

  First, from the document area identification, the upper left end (WX, WY), width (WW), and height (WH) of the document area are acquired, and an image of the area excluding the lower line of the document area is acquired (step S1101).

  Then, the acquired image is displayed over the document (step S1102).

  Next, horizontal scroll bar information (hBox, hPage, hMax) is acquired from the horizontal scroll bar identification (window handle in the case of Windows (registered trademark) environment) (step S1103).

  Then, the horizontal scroll box position (hBox) indicating the current horizontal display position is stored (step S1104).

  Next, the left edge of the page is displayed by moving to the horizontal scroll box position “0” using the API provided by the OS (step S1105).

  Then, the horizontal position number “0”, the horizontal scroll box position “0”, and the horizontal document position “0” are set in the horizontal position information table (steps S1106 to S1108) and stored as horizontal position information (step S1109).

  Then, 1 is added to the number of flat positions (step S1110).

  Next, horizontal scroll bar information (hBox, hPage, hMax) is acquired from the horizontal scroll bar identification (window handle in the case of Windows (registered trademark) environment) (step S1111).

  At this time, if there is no document in the right direction (that is, hBox + hPage> hMax), the process proceeds to step S1121.

  On the other hand, if there is a document in the right direction, the cursor is moved to the drag scroll start position (X, Y) by the following API provided by the OS (step S1113).

X = WX + WW-1
Y = WY + WH-1
:: SetCursorPos (X, Y);

Next, the left mouse button ON is notified to the document application by the API provided by the OS (step S1114).
:: mouse_event (MOUSEEVENT_LEFTDOWN, 0,0,0,0);

Next, the left button ON drag is notified to the document application by the following API provided by the OS (step S1115). Note that the drag length is about “256” (+ value: leftward scroll, −value: rightward scroll).
:: mouse_event (MOUSEEVENT_MOVE,-drag length, 0, 0, 0);

Further, the left button OFF is notified to the document application by the following API provided by the OS (step S1116).
:: mouse_event (MOUSEEVENT_LEFTUP, 0,0,0,0);

  Then, the drag length is added to the horizontal document position (step S1117).

  Next, horizontal scroll bar information (hBox, hPage, hMax) after drag scrolling is acquired (step S1118).

  Then, the horizontal scroll box position is set to “hBox” (step S1119).

  Next, the horizontal position of the document and the horizontal scroll box position are stored as horizontal position information in an area corresponding to the “number of horizontal positions” in the horizontal position information table (step S1120). Then, the processing from steps S1110 to S1120 is repeated until there are no rightward documents.

  When there is no right document, the horizontal scroll box position is moved to the position acquired in step S1104 by the API provided by the OS, and the document is returned to the original position (step S1121).

  Finally, the overly displayed document image is deleted, and the original document at the horizontal scroll box position is displayed (step S1122).

  In the document display device 100 of the present embodiment, it is possible to accurately detect the document position of a document displayed by an arbitrary application, and thus it is possible to effectively use document position detection when displaying a document accompanied by drag scrolling or the like. Become. In addition, during continuous document scrolling, the screen display is fixed except for a scroll area that is a part (edge) of the document image, so that the discomfort of the viewer can be eliminated. Further, even if the document position is changed by scroll display, the document position can be detected without delay.

  The document display device according to the present embodiment includes a control device such as a CPU shown in FIG. 1, a control unit including a storage device such as a ROM (Read Only Memory) and a RAM, and an external device such as an HDD and a CD drive device. The apparatus includes a storage device, a display device such as a display device, and an input device such as a keyboard and a mouse, and has a hardware configuration using a normal computer.

  The document display program executed in the document table device of the present embodiment is a file in an installable format or an executable format, such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), or the like. The program is provided by being recorded on a computer-readable recording medium.

  Further, the document display program executed by the document display apparatus according to the present embodiment may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. Further, the document display program executed by the document table device of the present embodiment may be provided or distributed via a network such as the Internet.

  The document display program executed by the document display apparatus according to the present embodiment has a module configuration including the above-described units (image acquisition unit, display control units 1 and 2 and position detection unit). When the CPU (processor) reads out and executes the document display program from the storage medium, each unit is loaded onto the main storage device, and the image acquisition unit, the display control units 1 and 2 and the position detection unit are installed on the main storage device. It is to be generated.

DESCRIPTION OF SYMBOLS 100 Document display apparatus 110 Control part 111 Application 112 Image acquisition part 113 Display control part 1
114 Position detection unit 115 Display control unit 2
DESCRIPTION OF SYMBOLS 120 Memory | storage part 121 Position detection control table 130 Input part 140 Display part

JP 2000-215000 A JP 2001-31264 A JP 2001-016384 A

Claims (7)

A document display device that scrolls and displays a document displayed by an arbitrary document application program operating on a general-purpose OS by emulating a drag scroll operation on a document,
Image acquisition means for acquiring a document image excluding a partial area of the original document image;
First display control means for displaying the acquired document image on the display means so as to overlap the original document image;
Position detecting means for detecting the display document position of the original document image at the time of scrolling based on the amount of movement by dragging the scroll bar displayed on the display means;
A document display apparatus comprising: a second display control unit that deletes the document image displayed in an overlapping manner and displays the original document at the detected display document position on the display unit.   2. The position detection unit associates a document vertical position with the top edge of the document first page as an origin and a vertical scroll box position, and acquires the document vertical position of the display document based on the information. Document display device.   3. The position detection unit associates a horizontal position of a document with the left end of the page as an origin and a horizontal scroll box position, and acquires the horizontal position of the display document based on the information. The document display device described.   4. The partial region of the original document image to be excluded when the image acquisition unit acquires the document image is any one end portion of the original document image. The document display device according to any one of the above. A document display method for scrolling and displaying a document displayed by an arbitrary document application program operating on a general-purpose OS by emulating a drag scroll operation on a document,
An image acquisition step of acquiring a document image excluding a partial area of the original document image;
A first display control step of displaying the acquired document image on the display unit so as to overlap the original document image;
A position detection step of detecting the display document position of the original document image at the time of scrolling based on the amount of movement by dragging the scroll bar displayed on the display means;
A document display method comprising: a second display control step of deleting the document image displayed in an overlapping manner and displaying the original document at the detected display document position on the display means.   A program for causing a computer to execute the document display method according to claim 5.   A computer-readable storage medium storing the program according to claim 6.

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