JPS61204686A - Display controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for controlling a cursor on a display screen in Japanese word processors, electronic typewriters, etc., and in particular, a method for positioning the cursor on the display screen so that it can be easily seen and scrolling the screen. The present invention relates to a display control device that can perform

[Conventional technology]

When displaying an inputted document on the display screen again in a Japanese word processor, etc., it is difficult for the hardware to display one page of the document (for example, one A4 sheet) on the display screen at once. Because it is difficult due to the limitations of
Each page is displayed by displaying a portion of each page on a portion of the display screen (this is called a reduced layout display screen) and changing the display portion on the layout screen. At this time, 1. On the layout screen, as each line of the document is scrolled up or down, other parts of the same page appear.

When performing the scrolling, conventionally, the cursor position indicating the position of one document correction is moved to the top or bottom end of the layout screen using the cursor keys, and then the scrolling is performed by continuously operating the cursor keys. Namely.

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 below the currently displayed part will scroll from the bottom edge of the layout screen. Then it appears.

The same applies when the upward cursor key is operated.

[Problem that the invention seeks to solve]

When correcting a document on the display screen used in a Japanese word processor such as the one mentioned above, 1. Corrections are often made while looking at the context of the displayed document, so the document line of interest is placed in the middle of the layout screen. It's annoying to scroll to a section and then move the cursor to the position of interest to make corrections. 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.

Then, use the cursor keys to scroll the document line of interest anywhere on the screen.

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.

[Purpose of the invention]

In order to solve the above problems, the present invention scrolls the screen by operating the cursor keys while placing the cursor at any convenient position on the display screen, thereby scrolling the document line of interest to the center of the display screen. After that,
It is an object of the present invention to provide a display control device that can immediately correct the document line.

[Structure of the invention]

The present invention uses two characters to solve the above problems.

Information storage means for sequentially distributing (,1) each symbol or numerical information in the order of input; and a display means for displaying information stored in an arbitrary storage area on the information storage means on a screen.

cursor moving means for moving a cursor on the screen of the display means; 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 displays storage area detection means for detecting whether or not a storage area to be displayed in the direction of cursor movement according to the cursor movement instruction exists on the information storage means with reference to the storage area on the information storage means in which the cursor movement is being performed; , when the storage area detecting means detects a storage area to be displayed in the moving direction of the cursor, the information to be displayed according to the cursor movement instruction without changing a predetermined position of the cursor on the screen; Shifting the storage area on the storage means and scrolling on the screen of the display means 1. If 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 present invention provides a display control device characterized in that it has 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 means.

[For production]

In the above means, it is assumed that the contents of a part of the storage area of the information storage means, which stores document information such as nine characters, symbols, or numbers, are displayed on the screen of the display means. Assume that the cursor is placed at a predetermined position 1 on the screen, for example, in the middle of a vertically bisected area. In this state, when the cursor moving means moves the cursor upward or downward, for example, the control means scrolls the screen without changing the position of the cursor. That is, 1. For example, when a downward cursor movement instruction is given,
While the cursor is placed in the center of the screen, the document part on the line further below the currently displayed part is read out from the corresponding storage area of the information storage means and scrolled from the bottom edge of the screen and appears ( In this case, the storage area detection means detects whether or not there is a storage area corresponding to the information storage means, and if the 11g area is detected, the scrolling is performed so that the 2 displayed document is at the end of the page. If the above storage area is not detected and the cursor is moved, the cursor position will move from the center of the screen to the bottom or top of the screen.In other words, if the document to be displayed is on the page Unless it is at the end or beginning, the cursor is always placed at the center of the screen and the screen is scrolled.

〔Example〕

Two embodiments of the present invention will be described in detail below.

FIG. 1 is an overall configuration diagram of an embodiment of the present invention. Right cursor key 11. Left cursor key 12. Downward cursor key 13. Up cursor key 14. A key manual unit 1 (cursor moving means) including a layout display key 15 and a layout display key 15 is connected to a CPU 2 (controlling means, storage area detecting means, information detecting means). CPU2 has document memory 8
(information storage means), register group 9. ROM memory 10
゜Timer 100 (This is not directly related to the operation of this embodiment) 1 Display memory 3. and the print control section 6 are connected. The display memory 3 is connected to the display section 5 (
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, the register group 9 includes an X-direction cursor register X, a Y-direction cursor register Y2, a display first row storage register SLR, a work register W1, a document memory address storage register TXADR, and a save register SAV.

In the embodiment with the above configuration, the first display section 5 can display the reduced layout screen 51 using a part of its screen, and can display the contents of the one document memory 8. In the case of this embodiment, the layout display capability at this time is that all 44 horizontal digits in the document memory 8 can be displayed in the horizontal direction as shown in FIG. It is assumed that 30 lines are displayed each and other parts are 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.

Are the keys input from the input unit 1 used as cursor keys 11 to 14 (FIG. 1) by the CPU 2?

It is determined whether the key is a character key (not specifically shown) that constitutes a document. When the cursor keys 11 to 14 are 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, if a single character key is entered,
The CPU 2 refers to the ROM memory 10 based on the input character code, performs kana-kanji conversion, etc., stores it in the corresponding location on the one-document memory 8, displays the reduced layout screen 51, and updates the cursor position. I do(
(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.

As shown in FIG. 1, addresses from O to 2639 are assigned. From the same figure, 1. For example, the 2nd digit of the 2nd line,
The address 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 that indicates 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. The work register W is a register (described later) used when moving the cursor or scrolling the screen. The 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. The save register SAV is a save register for each variable when each calculation is performed in the CPU 2.

Since it is not directly related to the operation of this embodiment, its operation will be omitted. Using the register group 9 as described above; C
The PU 2 creates a layout display image, transfers display data to the display memory 3, and causes the display section 5 to display a reduced layout screen 51 via the driver 4.

This display operation will be explained in detail 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 of FIG. 2 and each state diagram of FIG. 3. In this embodiment, as a general rule, the cursor position on the reduced layout screen 51 is the 16th line (center) in the vertical direction of the screen.
1 to make it easier to understand the context of the displayed document.

Now, as shown in FIG. 3(a), the reduced layout screen 51
The 10th to 39th lines of document memory 8 are displayed, and the 15th line on the 9th screen, that is, the 2nd line of document memory 8, is displayed.
Assume that the cursor is positioned above the fifth line. Note that among the values indicating the number of lines in FIG. 3, the values inside parentheses indicate the lines on the reduced layout screen 51, and the values outside the parentheses indicate the lines on the document memory 8. In the state of FIG. 3 (al), the value of the Y-direction cursor register Y is 25, and the value of the 1-display first row storage register SLR is 10.

In this state, from the key manual section 1 to the down cursor key 13
When inputted, the CPU 2 moves to the process of (2) in FIG.

Since the content of the Y-direction cursor register Y is 60 or less, the process moves from process (2) to process (2), and the content of the Y-direction cursor register Y is increased by +I to 26. This means that the cursor position has moved from the 25th line to the 26th line on the document memory 8. As a result, the process moves to process 1-2-2, and the contents of the 9 display first row storage register SLH are set to 11, which is the value obtained by subtracting 15 from the contents of the Y-direction cursor register Y. This is the cursor position.

In other words, when the cursor line (26th line) on the document memory 8 is set to the 16th line on the reduced layout screen 51, the process of calculating which line on the document memory 8 falls on the 1st line on the same screen. In this case, the first line on one screen corresponds to the 11th line on the document memory 8. Next, C
PU2 executes processes ① to ＠. This process is a process for displaying a document on the reduced layout screen 51. first,
Add 30 to the work register W seven times (processing ■). Next, by process ①, the document memory address storage register TX is
440, which is the address of the first digit of the 11th line on the document memory 8, is set in ADR. Following this, the CPU 2 registers the document memory address storage register TXADR in process ①.
11 on the document memory 8 as the read address.
Layout information for 44 columns of the row is read out and transferred to the 1 display memory 3. Next, in process [phase], 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, processing ■-@
- Returning to ■, the CPU 2 reads out the layout information of the next 12th line on the document memory 8.

Transfer to display memory 3. The above operation is repeated until the value of the work register W becomes O. As a result, layout information for 30 lines from the 11th line to the 30th line on the 1-document memory 8 is read out from the 1-document memory 8 to the display memory 3. After the above operations, 1 display memory 3 to driver 4
The contents are displayed on the reduced layout screen 51 via. As a result, the one-screen display changes to FIG. The cursor is displayed on the 16th line, which is the value minus the content 11 + 1.

The horizontal position of the cursor at this time is the content of the X-direction cursor register X. Do as above.

When the down cursor key 13 is input in the state shown in FIG. 3(a), the reduced layout screen 51 displays the
-(The document displayed without changing the cursor position as shown in bl scrolls up one line, and the 40th line on the document memory 8 newly appears from the bottom. The change is at the cursor position (16) on the reduced layout screen 51.
This may occur if there are lines 16 to 45 on the document memory 8 in the line (line 1).

On the other hand, when the upward cursor key 14 is input in the state shown in FIG.
-■, the contents of the Y-direction cursor register Y are subtracted by 1, and the same operation is performed. Namely.

On the reduced screen 51, the displayed document is scrolled down by one line without changing the cursor position.

Next, on the reduced layout screen 51, as shown in FIG. Assume that the cursor is positioned on the 46th line of . If the downward cursor key 13 is input in this state, the 61st line does not exist on the 9-document memory 8, so the screen cannot be scrolled upward. Therefore, C.P.
In FIG. 2, U2 moves to the process ■-■-■-■-■-■. As a result, the second display screen is the display first row storage register S.
Since the content of LR remains 31 and does not change, scrolling is not performed. Then, since the contents of the Y-direction cursor register Y are incremented by 1 in process 2, when the cursor is displayed in process 0, the cursor position moves down one line as shown in Figure 3 (dl). If the down cursor key 13 is pressed in state (C), the cursor position moves downward without scrolling one screen.From now on, each time the down cursor key 13 is pressed, the cursor moves in the same way.

The cursor position is on the 60th line, and the processing is done by Ai and CPU2.■-■
The cursor remains at the 60th line because the process (■) is not performed.

Moreover, contrary to the above, if the upward cursor key 14 is input in the state shown in FIG. 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, it is assumed that the first line to the 30th line on the document memory 8 is displayed on the reduced layout screen 51 as shown in FIG. When the upward cursor key 14 is input in this state.

Since there are no lines before the first line on the document memory 8, the screen cannot be scrolled down.

Therefore, the CPU 2 executes the process [phase]-〇-[
Phase】-〇-[Phase]-■. As a result, the content of the display first row storage register SLR remains 1 and does not change on the 2nd display screen, so scrolling is not performed. Since the contents of the Y-direction cursor register Y are incremented by 1 in the process [phase], when the cursor is displayed in process 0, the cursor position moves up one line as shown in FIG. 3(f). That is, the third
If the upward cursor key 14 is pressed in the state shown in Figure (e), the screen will not scroll and the cursor will move upward. Thereafter, each time the upward cursor key 14 is input, the cursor moves in the same way, and when the cursor position is on the first line, the CPU 2 enters the process O-■ and does not perform the process [phase].

The cursor remains on the first line.

Further, contrary to the above, if the down cursor key I3 is input in the state shown in FIG. 3(f), the CPU 2
■-■-■-■-[Phase]-■ 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. Due to this.

For example, when the document line you want to correct is scrolled to the center, you can immediately make the correction using the cursor. Furthermore, when one display screen is at the end of the document memory 8, the cursor position is moved without scrolling nine screens.

Next, when the right cursor key 11 is input, C
PU2 moves to the process O-[phase]=[phase]-0 in FIG. 2, and one screen does not scroll in the horizontal direction.

By incrementing the contents of the X-direction cursor register X by 1, only the cursor position moves one digit to the right.

Furthermore, when the cursor position is at the 44th digit and the right cursor key 11 is input, the CPU 2 moves to the process O-[phase]=[phase]-■, and the cursor position returns to the 1st digit, and Scroll up to the first line.

On the other hand, when the left cursor key 12 is input, C
The PU2 moves to the process ``----[phase]----'' and the contents of the X-direction cursor register X are decremented by 1, thereby moving the cursor position one digit to the left. Also.

When the cursor position is on the 1st digit, left cursor key 12
If you input , CPU2 performs processing 0-
○, and the cursor position returns to the 44th digit,
Scroll down one line.

Next, FIG. 4 shows the processing when a character key is input from the key input unit 1, and the CPU 2 refers to the ROM memory 10 and performs post-processing such as kana-kanji conversion @-■-[phase]
Then, the character code corresponding to the address in the document memory 8 indicated by the cursor position on the reduced layout screen 51 is stored.

Thereafter, the process automatically moves from 2 to the process [stock] 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, and is limited to the cursor as a means of indicating the position of interest. zu other characters,
It may be a symbol, number, etc. Furthermore, 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, when performing two-screen scrolling, the cursor position is set to the center of one screen of the reduced layerer 1, but 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 even if there is a storage area to be displayed, there is no data to actually display. to stop screen scrolling and
It is preferable to move the cursor. CPU for that purpose
An example of operation No. 2 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 key 13 is input, the CPU 2
The process moves from the process ■-■-■-■-■ in the figure to the process [stock] in FIG. At this time, the down cursor key 13 is pressed manually.
Since the operation flag of is set in the register of the CPU 2, the processing moves to step .

In the process @, the CPU 2 determines whether document information is stored before the corresponding line on the document memory 8 (FIG. 1) displayed on the 30th line of the reduced layout screen 51, and determines whether the document information is stored or not. In this case, the process directly goes to process 0 and 1 normal screen scrolling is performed.

On the other hand, if the document information is not stored.

The process moves to process O-■, and if the cursor position is not at the bottom edge of the screen, the process directly moves to process -2. As a result, the contents of the display first row storage register SLR remain unchanged.

Since only the contents of the Y-direction cursor register Y are incremented by 1 (process 2 in FIG. 2), one screen scroll is not performed and only the cursor position is moved down one line. Also.

Even if the document information is not stored, if the cursor position is at the bottom of the screen as a result of repeating the above operation.

The process moves to [phase]-0, and the screen is scrolled as it is, and the document screen disappears line by line.

On the other hand, when the up direction key 14 is input, the CPU 2
The process moves from the process [phase]-〇-[phase]-■-■ in the figure to the process ■ in FIG.

Then, because the down cursor key manual flag is not set due to the up cursor key manual power, the CPU 2 processes
-Move to @. In the process @, the reduced layout screen 51
If the document information is stored before the corresponding line on the document memory 8 displayed in the first line of , the CPU 2 performs the process -
Proceed directly to step 1. Perform normal screen scrolling. On the other hand, if the document information is not stored, process ◎-[F
], and if the cursor position is not at the top of the screen, the process moves directly to process ■. As a result, the contents of the 2-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 @l), so one screen scrolling is not performed, and only the cursor position is changed to 11r. Move up. Also, one document information is not memorized (but,
As a result of repeating the above operations, when the cursor position reaches the top of the screen, the process moves to process @-■, where the screen scrolls and the document screen disappears line by line.

According to the above two embodiments of the present invention, it is possible to scroll the screen in consideration of the cursor position.

〔effect〕

According to the present invention, the screen is scrolled while the cursor position is placed at an easily visible position on the display screen, so after scrolling the first document line of interest to an easily visible position on the display screen, the document is immediately corrected from the cursor position. It becomes possible to do the following.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention. 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. FIG. 5 is an operation flowchart of another embodiment of the present invention. 1...Key human resources department. 2...CPU. 5...Display section. 8...Document memory. 9...Regisov group. 11...Right cursor key. 12...Left cursor key. 13...Downward cursor. 14...Upward cursor key. X...X direction cursor register. Y...Y direction cursor register. SLR: Display first row storage register. W...Work register. Patent Applicant Casio Computer Co., Ltd. Figure 2

Claims (3)

[Claims] (1) Information storage means for sequentially storing character, symbol, or numerical information in the order of input; display means for displaying information stored in any storage area on the information storage means; cursor moving means for moving a cursor on a screen; and when the cursor moving means issues a cursor movement instruction to a cursor located at a predetermined position on the screen of the display means, the display means displays. Storage area detection means for detecting whether or not a storage area to be displayed in a 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 detection means detects a storage area to be displayed in the moving direction of the cursor, the information storage area on the information storage means to be displayed in accordance with the cursor movement instruction without changing the predetermined position of the cursor on the screen. When scrolling is performed on the screen of the display means by shifting the storage area, and the storage area detecting means does not detect a storage area to be displayed in the moving direction of the cursor, the storage on the information storage means to be displayed; 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 the area. (2) the predetermined position of the cursor on the screen of the display means is an arbitrary position on a line that vertically divides the screen into two;
When the control means scrolls on the screen of the display means, the direction of the cursor movement instruction by the cursor movement means and the direction of scrolling based on the instruction are the up and down directions of the screen of the display means. A display control device according to claim 1. (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 above information is stored, and when the information detecting means detects each of the above information, the predetermined position of the cursor on the screen is not changed and the cursor is moved according to the cursor movement instruction. Shifting the storage area on the information storage means to be displayed and scrolling on the screen of the display means, and when each piece of information is not detected by the information detection means, the storage area on the information storage means to be displayed is scrolled. 2. The display control device according to claim 1, further comprising 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.