JPH0560117B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for controlling a cursor on a display screen in Japanese word processors, electronic typewriters, etc., and particularly to a method for controlling a cursor on a display screen by placing the cursor at an easily visible position on the display screen. The present invention relates to a display control device capable of scrolling.

[Conventional technology]

When displaying the inputted document on the display screen again using a Japanese word processor, etc., 1.
Because it is difficult to display pages of a document (for example, one A4 sheet) on the display screen at once due to hardware limitations, we display a portion of each page on a portion of the display screen. By displaying the layout of a wider area than the displayed portion (this is called a layout screen), it is possible to know the layout of the entire document on this layout screen. At this time, on the layout screen, each line of the document is scrolled up or down to reveal other parts of the same page.

When performing the scrolling, conventionally, the cursor position indicating the position of document correction is moved to the top or bottom edge of the layout screen using the cursor keys, and then scrolling is performed by continuously operating the cursor keys. I'm going. That is, for example, if you operate the down cursor key to move the cursor position to the bottom edge of the layout screen, and then operate the down cursor key, the document part in the line further below the currently displayed part will be moved to the bottom edge of the layout screen. It will scroll and appear. The same applies when the upward cursor key is operated.

[Problem to be solved by the invention]

When correcting a document on the display screen used in a Japanese word processor such as the one mentioned above, corrections are often made while looking at the context of the displayed document. Corrections are often made by scrolling to the middle part of the image and then moving the cursor to the position of interest. However, in the case of the conventional cursor control method, the cursor is first moved to the top or bottom of the layout screen using the cursor keys, and then the document line of interest is moved within the screen by operating the cursor keys. After scrolling the document, it is necessary to move the cursor back to the document position and make corrections, which poses a problem in that the overall operation is difficult.

An object of the present invention is to enable the screen to be scrolled by operating the cursor keys while keeping the cursor at an easy-to-see position in the middle of the display screen.

[Means to solve the problem]

The means of the present invention are as follows.

Information storage means for sequentially storing each information of characters, symbols, or numbers in the input order; a display means for displaying on a screen the information stored in an arbitrary storage area on the information storage means; and on the screen of the display means. a cursor moving means for moving a cursor; and when the cursor moving means issues a cursor movement instruction to a cursor at a predetermined position on the screen of the display means, the display means performs a display. storage area detection means for detecting whether or not a storage area to be displayed in the cursor movement direction according to the cursor movement instruction exists on the information storage means with reference to the storage area on the information storage means; When the area detection means detects a storage area to be displayed in the moving direction of the cursor, the information storage means should display the cursor in accordance with the cursor movement instruction without changing the position of the cursor on the screen. Shifting the storage area upward and scrolling on the screen of the display means, and when the storage area detecting means does not detect a storage area to be displayed in the moving direction of the cursor, the information storage to be displayed. The control means moves the cursor on the screen of the display means in response to the cursor movement instruction without changing the storage area on the means.

[Effect]

The operation of the means of this invention is as follows.

It is assumed that the contents of a partial storage area of the information storage means that stores document information such as characters, symbols, or numbers are displayed on the screen of the display means. Assume that the cursor is placed at a predetermined position on the screen, for example, halfway vertically. In this state, if the cursor moving means instructs the cursor to move, for example, in an upward or downward direction,
The control means scrolls the screen without changing the position of the cursor. That is, for example, when a downward cursor movement instruction is given, the cursor remains at the center of the screen and the document portion in the line further below the currently displayed portion is read out from the corresponding storage area of the information storage means. It appears by scrolling from the bottom of the screen. In this case, the storage area detection means detects whether there is a storage area corresponding to the information storage means, and if the storage area is detected, the scrolling is performed so that the displayed document is moved to the end of the page, etc. When the cursor is moved when the storage area is not detected, the cursor position moves from the center of the screen to the bottom or top of the screen for the first time.

Therefore, unless the document to be displayed is at the end or the beginning of a page, the cursor is always placed at the center of the screen and the screen is scrolled.

〔Example〕

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

FIG. 1 is an overall configuration diagram of the embodiment. Right cursor key 11, left cursor key 12,
Down cursor key 13, up cursor key 1
4 and a key input section 1 including a layout display key 15 are connected to the CPU 2. A document memory 8, a register group 9, a ROM memory 10, a timer 100 (this is not directly related to the operation of this embodiment), a display memory 3, and a print control unit 6 are connected to the CPU 2. A display section 5 is connected to the display memory 3 via a driver 4, and the display section 5 can display a reduced layout screen 51. Further, a printing section 7 is connected to the printing control section 6 . On the other hand, register group 9 includes an X-direction cursor register X, a Y-direction cursor register Y, a display first row storage register SLR,
It consists of a work register W, a document memory address storage register TXADR, and a save register SAV.

In the embodiment configured as described above, first, the display section 5 can display a reduced layout screen 51 using a part of its screen, and can display the contents of the document memory 8. In this embodiment, the layout display capability at this time is determined by the document memory 8 in the horizontal direction as shown in the reduced layout screen 51 in FIG.
It is assumed that all 44 horizontal digits can be displayed, and in the vertical direction, 30 lines out of 60 vertical lines in the document memory 8 are displayed at a time, and other parts can be displayed by scrolling. In this display, the current position of interest (the position to be corrected, etc.) is displayed by a blinking cursor as shown in FIG.

First, when the layout display key 15 is input from the input section 1, the CPU 2 instructs the display section 5 to display the reduced layout screen 51. After that, each key input from the input section 1 is sent to the CPU 2.
It is determined whether the keys are the cursor keys 11 to 14 (FIG. 1) or the character keys (not shown) constituting a document. And cursor key 11~
14 is input, the CPU 2 operates the register group 9 to read the contents of the document memory 8 and moves the cursor or scrolls the screen on the reduced layout screen 51 (details will be described later). On the other hand, when a character key is input, the CPU 2 uses the ROM memory 10 based on the input character code.
While referring to , kana-kanji conversion and the like are performed and stored in the corresponding location on the document memory 8, and the reduced layout screen 51 is displayed and the cursor position is updated (details will be described later).

Next, the document memory 8 is a RAM memory that can store sentences of up to 44 horizontal columns x 60 vertical lines.
Like the document memory 8 in FIG. 1, addresses from 0 to 2639 are assigned. From the figure, for example, the address in the second digit of the second line is 45. The X-direction cursor register X is a register indicating the horizontal digit position of the cursor, and takes values from 1 to 44. The Y-direction cursor register Y is a register indicating the currently focused document line (vertical line position of the cursor), and takes values from 1 to 60. The display first line storage register SLR is a register indicating which line on the document memory 8 is to be displayed as the first line of the reduced layout screen 51, and takes a value from 1 to 31. Work register W is a register used when moving the cursor or scrolling the screen (described later)
It is. Document memory address storage register
TXADR is a register that specifies an address when reading document information from the document memory 8 to the reduced layout screen 51. Save register SAV is CPU2
This is a save register for each variable when performing each operation. Using the register group 9 as described above,
The CPU 2 creates a layout display image, transfers display data to the display memory 3, and causes the display unit 5 to display a reduced layout screen 51 via the driver 4.

This display operation will be explained below. first,
The display operation of the reduced layout screen 51 when the cursor keys 11 to 14 are input will be explained using the operation flowchart in FIG. 2 and the state diagrams in FIG. 3. In this embodiment, as a general rule, the cursor position on the reduced layout screen 51 is placed at the 16th line (center) in the vertical direction of the screen to make it easier to grasp the context of the displayed document.

Now, as shown in FIG. 3A, the 10th to 39th lines of the document memory 8 are displayed on the reduced layout screen 51, and the 16th line on the screen, that is, the top of the 25th line of the document memory 8 is displayed. Suppose the cursor is located at . It should be noted that among the values indicating the number of lines in FIG. 3, the values inside brackets indicate lines on the reduced layout screen 51, and the values outside these indicate lines on the document memory 8. In the state shown in FIG. 3a, the value of the Y-direction cursor register Y is 25, and the value of the display first row storage register SLR is 10. In this state, from the key input section 1 to the down cursor key 13
When is input, the CPU 2 moves to the process shown in FIG. Then, since the contents of the Y direction cursor register Y is 60 or less, the process moves from one process to another.
Add 1 to the contents of the Y-direction cursor register Y to 26. This means that the cursor position is on document memory 8.
This means that the line has moved from the 25th line to the 26th line. As a result, the process moves to →→, and the contents of the display first row storage register SLR are set to 11, which is the value obtained by subtracting 15 from the contents of the Y-direction cursor register Y. The cursor position, that is, the cursor line (26th line) on the document memory 8, is reduced to the layout screen 51.
This is the process of calculating which line in the document memory 8 will be the first line on the same screen when the 16th line above is selected.In this case, the first line on the screen will be the line in the document memory 8 This means that the 11th line of continue,
The CPU 2 executes processing. This process is
This is a process of displaying a document on the reduced layout screen 51. First, 30 is set in the work register W (processing). Next, through processing, 440, which is the address of the first digit of the 11th line on the document memory 8, is set in the document memory address storage register TXADR. Following this, in processing, the CPU 2 reads the contents of the document memory address storage register TXADR and uses it as the read address for the 11th line on the document memory 8.
The layout information for 44 digits is read out and transferred to the display memory 3. Next, in the process, 44 is added to the contents of the document memory address storage register TXADR, and the address value is advanced by one line. As a result, the processing returns to →→, and the CPU 2 uses the document memory 8.
The layout information of the next 12th line above is read and transferred to the display memory 3. The above operation is repeated until the value of the work register W becomes 0. As a result, layout information for 30 lines from the 11th line to the 40th line on the document memory 8 is read from the document memory 8 to the display memory 3. After the above operations, the contents are displayed on the reduced layout screen 51 from the display memory 3 via the driver 4. the result,
The screen display changes from a to b in Fig. 3. Then, through the subsequent processing (Figure 2), the value obtained by subtracting the content 11 of the display first row storage register SLR from the content 26 of the Y-direction cursor register Y on the display screen + 1.
Display the cursor on line 16.

The horizontal position of the cursor at this time is the content of the X-direction cursor register X. As described above, when the downward cursor key 13 is input in the state shown in FIG. 3a, the document is displayed on the reduced layout screen 51 without changing the cursor position as shown in FIG. Scroll up one line and a new 40th line on the document memory 8 will appear from the bottom. The change from a to b in FIG. 3 can occur when the cursor position (line 16) on the reduced layout screen 51 is located at lines 16 to 45 on the document memory 8.

On the other hand, in the state shown in Figure 3a, press the up cursor key 1.
If you input 4, CPU2 will process→→
→, the contents of the Y-direction cursor register Y are subtracted by 1, and the same operation is performed. That is, on the reduced layout screen 51, the document displayed without changing the cursor position is scrolled down by one line.

Next, on the reduced layout screen 51, the image shown in FIG.
From the last 31st line on document memory 8 as shown in
It is assumed that up to the 60th line is displayed and the cursor is positioned above the 16th line on the screen, that is, the 46th line on the document memory 8. If you press the down cursor key 13 in this state, the data on the document memory 8 will be
Line 61 does not exist, so the screen cannot be scrolled up. Therefore, the CPU 2 moves to the process →→→→→ in FIG. As a result, the display screen is stored in the display first row storage register.
Scrolling is not performed because the contents of SLR remain 31 and do not change. Then, since the contents of the Y-direction cursor register Y are incremented by 1 in the process, when the cursor is displayed in the process, the cursor position is set to 3.
Move down one line as shown in Figure d. That is, the third
If the down cursor key 13 is pressed in the state shown in Figure c, the screen will not be scrolled and the cursor will move downward. Below, down cursor key 13
The cursor moves in the same way every time you input , and when the cursor position reaches the 60th line, the CPU 2 changes from processing to no processing, so the cursor remains at the 60th line.

Also, contrary to the above, if the upward cursor key 14 is input in the state shown in FIG. 3d,
CPU2 moves through processing→→→→→
The cursor position moves until it returns to the 16th line on the screen, and then the screen scrolls as described above.

On the other hand, on the reduced layout screen 51, the screen shown in FIG.
From the first line on the document memory 8 as shown in
It is assumed that up to the 30th line is displayed. If the upward cursor key 14 is input in this state, the screen cannot be scrolled down because there are no lines before the first line on the document memory 8.
Therefore, CPU2 processes →→ in Figure 2.
→→→ As a result, the display screen is not scrolled because the content of the display first row storage register SLR remains 1 and does not change. Since the contents of the Y-direction cursor register Y are incremented by -1 in the process, when the cursor is displayed in the process, the cursor position moves up one line as shown in FIG. 3f. That is, when the upward cursor key 14 is input in the state shown in FIG. 3e, the screen does not scroll and the cursor position moves upward. From now on, each time you press the up cursor key 14, the cursor moves in the same way, and when the cursor position is on the first line.
CPU2 changes from processing to processing and does not perform any processing, so the cursor remains at the first line.

Also, contrary to the above, if the down cursor key 13 is input in the state shown in Figure 3 f,
CPU2 moves through processing→→→→→
The cursor position moves until it returns to the 16th line on the screen, and then the screen scrolls as described above.

As described above, when the up and down cursor keys are input, the screen scrolls down or up while the cursor remains at the center of the screen. This results in
For example, as soon as the document line to be corrected is scrolled to the center, corrections can be made using the cursor. Furthermore, when the display screen is at the edge of the document memory 8, the cursor position is moved without scrolling the screen.

Next, when the right cursor key 11 is input, the CPU 2 moves to the position →→→ in FIG.
, the screen does not scroll horizontally, and the screen changes to
By incrementing the contents of the direction cursor register X by 1, only the cursor position moves one digit to the right. Further, when the cursor position is at the 44th column and the right cursor key 11 is input, the CPU 2 moves from the process →→→, and the cursor position returns to the 1st column and scrolls up one line.

On the other hand, when the left cursor key 12 is input, the CPU 2 moves from processing → →
By decrementing the contents of the direction cursor register X by 1, the cursor position moves one digit to the left. Also,
If the cursor position is in the first digit and you press the left cursor key 12, the CPU 2 will process →
→ → The cursor position returns to column 44 and scrolls down one line.

Next, FIG. 4 shows the processing when a character key is input from the key input unit 1, and the UPU 2 refers to the ROM memory 10 and performs post-processing such as kana-kanji conversion. , and the reduced layout screen 51
The character code corresponding to the address on the document memory 8 indicated by the upper cursor position is stored. Thereafter, the process automatically moves from 〓〓 to the process shown in FIG. 2, and the cursor position is moved one digit to the right.

Based on the embodiments described above, the screen can be scrolled with the cursor positioned at the center of the screen, and the context of the document centered around the cursor position can be very easily seen.

The above embodiment is an example in which the present invention is applied to a reduced layout screen display of a Japanese word processor, etc., but it is of course applicable to a normal screen display. It is not limited to , but other characters, symbols, numbers, etc. may be used. Further, in the case of this embodiment, all digits of the document memory can be displayed in the horizontal direction, but it may be possible to scroll in the horizontal direction as a partial display, similar to the vertical direction. Furthermore, although the cursor position when scrolling the screen is set to the center of the reduced layout screen, the cursor position is not limited to this and may be set to any position that is easy to see. In addition, if left and right or top and bottom margins are set in this embodiment, the cursor can be moved or the screen scrolled within the range of the margins.

Next, in the above embodiment, the screen is scrolled if there is a storage area in the document memory in the direction of movement of the cursor, but if there is a storage area to be displayed but there is no data to actually display, the screen is scrolled. It is desirable to stop screen scrolling and move the cursor. An example of the operation of the CPU 2 for this purpose is shown in FIG. The part surrounded by a broken line * is
The parts with the same symbols in Fig. 2 are replaced as they are.

First, when the down cursor key 13 is input, the CPU 2 performs the processing shown in Fig. 2 →→→→
Then, the process moves to the process shown in FIG. At this time, the operation flag of the down cursor key 13 is set by the key input.
Since it is set in the register of CPU2, processing moves to 〓〓. In the process 〓〓, the document memory 8 displayed on the 30th line of the reduced layout screen 51
(FIG. 1) The CPU 2 determines whether or not document information is stored before the corresponding line above, and if it is stored, the process directly moves to 〓〓 and normal screen scrolling is performed. On the other hand, if the document information is not stored, the process moves from 〓〓〓→〓〓, and if the cursor position is not at the bottom of the screen, the process continues. As a result, the contents of the display first row storage register SLR do not change, and only the contents of the Y-direction cursor register Y are incremented by 1 (processing in Figure 2), so the screen does not scroll and only the cursor position moves down one line. . Also, even if the document information is not stored, if the cursor position reaches the bottom of the screen as a result of repeating the above operation, the process moves to 〓〓→〓〓, and the screen scrolls, and the document screen disappears line by line. .

On the other hand, when the upward cursor key 14 is input, the CPU 2 performs the processing shown in FIG.
Then, the process moves to the process shown in FIG.

Then, since the down cursor key input flag is not set by the up cursor key input,
CPU2 moves to processing 〓〓→〓〓. In the process,
If the document information is stored before the corresponding line on the document memory 8 displayed in the first line of the reduced layout screen 51, the CPU 2 directly moves to the process 〓〓→〓〓 and performs normal screen scrolling. . On the other hand, if the document information is not listed, process it.〓〓→〓〓
If the cursor position is not at the top of the screen, the process continues. As a result, the contents of the display first row storage register SLR do not change, and only the contents of the Y-direction cursor register Y are decremented by 1 (processing in Figure 2), so screen scrolling is not performed.
Only the cursor position moves up one line. Furthermore, even if no document information is written, if the cursor position reaches the top of the screen as a result of repeating the above operations, the process moves to 〓〓→〓〓, and the screen is scrolled as it is, and the document screen disappears line by line.

As described above, according to the embodiments of the present invention, screen scrolling can be performed in consideration of the cursor position.

〔Effect of the invention〕

According to the present invention, since the screen is scrolled while keeping the cursor position at an easily visible position on the display screen, it is possible to easily make corrections to the document.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the embodiment, FIGS. 2 and 4 are operational flowcharts of the embodiment of FIG. 1,
FIG. 3 is a state explanatory diagram of the embodiment of FIG. 1, and FIG. 5 is an operation flowchart of another embodiment. DESCRIPTION OF SYMBOLS 1...Key input section, 2...CPU, 5...Display section, 8...Document memory, 9...Register group, 11
...Right cursor key, 12...Left cursor key, 13...Down cursor key, 14...
Up direction cursor key, X...X direction cursor register, Y...Y direction cursor register, SLR...
...Display first row storage register, W...Work register.

Claims (1)

[Scope of Claims] 1. Information storage means for sequentially storing character, symbol, or numerical information in the order of input, and display means for displaying information stored in any storage area on the information storage means on a screen; a cursor moving means for moving a cursor on the screen of the display means; and a cursor moving means for moving the cursor at a predetermined position on the screen of the display means when the cursor moving means gives a cursor movement instruction to the cursor at a predetermined position on the screen of the display means; A memory for detecting whether or not a storage area to be displayed exists on the information storage means in the direction of movement of the cursor according to the cursor movement instruction based on the storage area on the information storage means where the display is being performed. area detection means; and when the storage area detection means detects a storage area to be displayed in the moving direction of the cursor, the cursor is displayed in response to the cursor movement instruction without changing the position of the cursor on the screen. When scrolling is performed on the screen of the display means by shifting the storage area on the information storage means to be displayed, and the storage area to be displayed in the moving direction of the cursor is not detected by the storage area detection means. A display control device comprising a control means for moving the cursor on the screen of the display means in response to the cursor movement instruction without changing a storage area on the information storage means to perform display. 2. The predetermined position of the cursor on the screen of the display means is an arbitrary position on a line vertically dividing the screen into two, and the cursor moving means when the control means scrolls on the screen of the display means. 2. The display control device according to claim 1, wherein the direction of the cursor movement instruction and the direction of scrolling based on the instruction are the vertical direction of the screen of the display means. 3 In the display control device, when the storage area detecting means detects a storage area to be displayed in the direction of movement of the cursor according to the cursor movement instruction, each information of the characters, symbols, or numbers is stored in the storage area. information detecting means for detecting whether or not the information is stored, and when the information detecting means detects each piece of information, the cursor movement instruction is provided without changing the predetermined position of the cursor on the screen. The storage area on the information storage means to be displayed is shifted according to the information storage means, and scrolling is performed on the screen of the display means, and if each piece of information is not detected by the information detection means, the storage area on the information storage means to be displayed is Claim 1, further comprising a control means for moving the cursor on the screen of the display means in response to the cursor movement instruction without changing the storage area on the information storage means. Display control device.