JP2860384B2 - Text display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Regarding a text display device that scrolls in units of screens, a first line number / last line number of text displayed on a screen is displayed as a last line number / first line number of a screen, and a plurality of screens are displayed. Screen buffer that stores text with line numbers, and the first line number / last line number of text with line numbers stored in this screen buffer. For executing the screen unit scrolling in response to the pressing of the screen up key / screen down key in the screen buffer as the last line number / top line number of the screen in the screen buffer. The means replaces the first line number / last line number of the text having the line number with the last line number /
The first line number is stored in the screen buffer so as to be scrolled and displayed on a screen basis.

[Industrial applications]

The present invention relates to a text display device that scrolls in screen units.

[Problems to be solved by conventional technology and invention]

Conventionally, when a program described in association with a line number is displayed on a screen, and the user wants to see the first (or last) line, the user sees one line at a time by upward (or downward) line-by-line scrolling. Moved to the desired line and displayed. It is also conceivable to switch to the previous page or the next page in units of screens, move to the line to be viewed, and display.

However, moving the former one line at a time to the desired line and displaying it on the screen has a problem that the operation is troublesome. Also, switching to the screen unit of the latter is displayed in the middle of the program described in association with the line number at the screen break, which makes it difficult to see and associate the original screen with the current screen. There is a problem that can not be.

According to the present invention, the first line number /
The purpose is to display the last line number as the last line number / first line number of the screen, and to easily display text over a plurality of screens by a simple operation.

[Means to solve the problem]

 Means for solving the problem will be described with reference to FIG.

In FIG. 1, a screen buffer 1 is a buffer for storing text having a line number.

The screen unit scroll execution means 3 stores the first line number / last line number of the text having the line number stored in the screen buffer 1 in the screen buffer 1 as the last line number / first line number of the screen. Is what you do.

[Action]

As shown in FIG. 1, according to the present invention, in response to the pressing of the screen up key / screen down key, the screen unit scroll execution means 3 transmits the text having the line number stored in the screen buffer 1 to the screen buffer. The first line number / last line number is stored in the screen buffer 1 so as to be the last line number / first line number, and is displayed by scrolling on a screen basis.

Therefore, by displaying the first line number / last line number of the text displayed on the screen as the last line number / first line number of the screen, it is possible to easily display the text over a plurality of screens by a simple operation. .

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be sequentially described in detail with reference to FIGS.

In FIG. 1, a screen buffer 1 is a buffer for storing text having a line number. The text having the line number stored in the screen buffer 1 (eg, a program described in association with the line number) is displayed on the display 4.

The temporary buffers 2-1 and 2-2 are buffers for storing three lines of text above and below the screen buffer 1, respectively.

The screen unit scroll execution means 3 scrolls a text having a line number stored in the screen buffer 1 on a screen basis, and changes the first line number / last line number in the screen buffer 1 to the last line number of the screen. This is stored in the screen buffer 1 as a line number / head line number.

The program 5 is a program for storing the corresponding text in the screen buffer 1 and the temporary buffers 2-1 and 2-2 in response to the notification from the screen unit scroll execution means 3.

The screen scrolling when one logical row is one physical row will be described with reference to FIG. In this case, since one logical line is one physical line, the scroll start line in the figure = the first line number (the line number assigned to the program), and the scroll last line = the last line number.

FIG. 2A shows the current display state. In the state of FIG. 2 (a), when the on-screen movement key is pressed once, FIG. 2 (b)
The screen is scrolled as shown in FIG. In addition, in the state shown in FIG.
The screen is scrolled as shown in FIG. This will be specifically described below.

FIG. 2 (b) shows a display state after the screen move key is pressed once under the state of FIG. 2 (a). This is the second
Figure (a) Scroll start line "10" of screen buffer 1
In FIG. 2 (b), the last line of the scroll of the screen buffer 1 is set to “100”, and before this, “23” lines of text with the line numbers are stored as shown in FIG. It is.

FIG. 2 (C) shows a display state after the screen down key is pressed once under the state of FIG. 2 (A). This is the second
Figure (a) Scroll last line “12” of screen buffer 1
2 "(= last line number) is the scroll start line" 122 "of the screen buffer 1 in FIG. 2 (c), and after this, a total of 23 lines of text with line numbers as shown are stored. is there.

The screen scrolling when one logical row is a plurality of physical rows will be described with reference to FIG. In this case, since one logical line is a plurality of physical lines, the scroll start line in the figure is not always at the position of the first line number. At that time, the first line number is found and this is set as the first line number. I do. Similarly, when the last line of the scroll is not at the position of the last line number, the last line number is found and set as the last line number (see FIG. 4 described later).

FIG. 3 (a) shows the current display state. In the state of FIG. 3 (a), when the movement key on the screen is pressed once, FIG. 3 (b)
The screen is scrolled as shown in FIG. In addition, in the state shown in FIG.
The screen is scrolled as shown in FIG. This will be specifically described below.

FIG. 3 (b) shows a display state after the screen move key is pressed once under the state of FIG. 3 (a). This is the third
FIG. 3 (b) Since there is no line number in the scroll start line of the screen buffer 1, the first appearing line number "200" is found and this is set as the first line number "200". The last line is "200", and before this, texts with line numbers are stored for 23 lines as a whole as shown in the figure.

FIG. 3 (C) shows a display state after the screen down key is pressed once under the state of FIG. 3 (A). This is the third
Since there is no line number in the last line of the scroll of the screen buffer 1 (a), the line number "210" which appears first is found and is set as the last line number "210". The start line is "210", and after this, texts with line numbers are stored for 23 lines as a whole as shown in the figure.

Next, in the order shown in the flowchart of FIG.
The operation of the diagram configuration will be described in detail.

In FIG. 4, a program is displayed. In this case, the program is displayed on the display 4 in association with the line numbers, for example, as shown in FIGS. 2 (A) and 3 (A).

Determines the pressed screen key. In the case of the up key (the key to move on the screen), is executed. In the case of the down key (movement key down the screen), the processing in parentheses thereafter is applied as described in.

Determines whether there is a line number in the first line (last line). In the case of YES, the text is set in the screen buffer 1 for 23 lines upward (downward) from the line number. This corresponds to the pressing of the screen up key (screen down key) in the state of FIG. 2 (a), and the display state of FIG. 2 (b) (the display of FIG. 2 (c)). (State) means that text is set in the screen buffer 1 for 23 lines. In the case of NO, find the first line number of the lower line (upper line) (for example, find the first line number “200” or “210” in FIG. 3 (a)), and move upward from that line number. (Downward) 23 lines of text are set in the screen buffer 1. This corresponds to the pressing of the screen up key (screen down key) in the state of FIG. 3 (a), and the display state of FIG. 3 (b) (the display of FIG. 3 (c)). (State) means that text is set in the screen buffer 1 for 23 lines.

Sets three lines of text above and below the temporary buffer, respectively.

 Is displayed on the display.

With the above processing, it is possible to scroll on a screen basis based on the top line number / last line number on the screen.

〔The invention's effect〕

As described above, according to the present invention, on the screen (bottom)
In response to the pressing of the movement key, a predetermined line is displayed from the last line number / first line number based on the first line number / last line number of the text displayed on the screen. Text such as a program with a line number across the screen can be displayed in a legible manner by a simple operation.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of a specific example of the present invention, and FIG. 4 is a flowchart for explaining the operation of the present invention. In the figure, 1 is a screen buffer, 2-1 and 2-2 are temporary buffers, 3 is screen unit scroll execution means, 4
Represents a display.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G09G 5/34 G06F 3/14 360 G06F 3/00 656

Claims (2)

(57) [Claims] 1. A text display device for displaying a text in which a line with a line number and a line without a line number are mixed, an instruction means for receiving a scroll instruction for a currently displayed text, and a downward scroll instruction. And a scroll execution means for scrolling the line having the last line number on the screen currently displayed on the screen so as to be the first line of the next display screen. apparatus. 2. A text display device for displaying text in which a line with a line number and a line without a line number are mixed, an instruction means for receiving a scroll instruction for a currently displayed text, and an upward scroll instruction. And a scroll execution means for scrolling the line having the first line number on the screen currently displayed on the screen so as to be the last line of the next display screen. apparatus.