JPH0440731B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document device such as a word processor, and is particularly intended to improve processing that involves line movement on a display screen.

This type of device includes a main storage section that can store document contents, and a CRT-configured screen display section that displays the contents of the storage section. The screen display section has a display storage section, and retrieves necessary documents from among the documents in the main storage section to the display storage section and displays them.

As shown in FIG. 1, the main memory contains the first, second,
Assume that third documents 1a, 1b, and 1c are included, and a copy of these documents is taken out to the display storage section and displayed as shown in FIG. Then, in such screen display, the first to third documents 1
The display portions corresponding to a to 1c are respectively referred to as first to third display areas 2a to 2c, and when only the second display area 2b is scrolled one line downward, the second display area is displayed as shown in FIG. The bottom line of 2b is pushed out and disappears, and new line contents are fetched from the main memory and displayed on the first line.

Conventionally, to scroll a specific area like this, first scroll the entire display memory, move one line down in the entire screen area, and add a space to the first line, as shown in Figure 4. 3, and then display the corresponding new line contents retrieved from the main memory in the first line space of the second display area 2b, and at the same time display the entire contents of the other areas 2a and 2c from the main memory. The final display state as shown in FIG. 3 is obtained by taking out the data into the display storage unit again.

However, in such conventional scroll processing, for other areas that do not require scrolling, all data must be fetched from the main memory and rewritten to the display memory, which reduces processing time. This is undesirable because it takes a long time and, on devices with slow processing speeds, momentary flickering may appear in the display of other areas that do not require scrolling.

The present invention has been made in view of the above points, and will be described below with reference to Examples.

The configuration of the apparatus of this embodiment is shown in FIG. In this device, a control unit 11 creates a document in a main storage unit 12 based on document data input from a keyboard 10, and displays the document creation status on a screen display unit (for example, a CRT device) 13. urge As mentioned above, the screen display section 13 has a display storage section, and retrieves necessary documents from the main storage section 12 to the display storage section and displays them.

As shown in FIG. 6, the normal screen display state of this device is such that the bottom two lines of the screen are fixed display areas 14,
The area above this is a document display area 15. In the fixed display area 14, a scale 14a indicating display digits is displayed.
, the document editing message 14b is displayed.

The control unit 11 stores a program for performing specific screen processing, and FIG. 7 shows such a program. The specific screen process is defined as a process that involves moving lines on the screen, and includes the above-mentioned scrolling and other processes such as line insertion and line deletion.

The above specific screen processing will be explained below along with the program shown in FIG. As one of the initialization processes performed when power is turned on to the apparatus, the coordinates of points P _I and P _L are set in advance in a first coordinate register and a second coordinate register, respectively.
Each of these points is a fixed point on the screen, and the sixth
As shown in the figure, P _I corresponds to the position of the first character column of the first line on the screen, and P _L corresponds to the position of the last character column of the bottom line of the document display area 15, respectively.

Now, on the screen display unit 13, as shown in FIG. 8, each document is displayed in the first to third display areas 16a to 16c.
Consider a case where the above-mentioned specific screen processing is applied only to 6b.

First, the cursor movement key is operated on the keyboard 10 to position the cursor at the left shoulder point Pi of the second display area 16b as shown in FIG. All key operations on the keyboard 10 are processed in a key processing step 20, and when a key is input indicating processing other than specific screen processing, corresponding processing is performed using a well-known method as other processing. The cursor movement process using the cursor key movement key is treated as the other process.

Next, operate the downward scroll key on the keyboard 10. At this time, in key processing step 20, it is determined that this is the first key operation, and then the current cursor position, that is, the coordinates of point Pi, is written in the first coordinate register, and then the process returns to key processing step 20. .

Then, move the cursor again to the second
Position yourself at the lower right corner point P of the display area 16b, and then operate the downward scroll key. At this stage, in key processing step 20, it is determined that this is the second downward scroll key operation, and then the coordinates of the current cursor position, ie, point P, are written into the second coordinate register.

Then, when the execution key on the keyboard 10 is operated, the coordinates are calculated based on the contents of the first and second coordinate registers, and the point is calculated as shown in FIG.
Other diagonal vertices of a rectangle whose diagonal vertices are Pi and P
Calculate the coordinates of Pm and Pn. Here, each point Pi, Pm,
The area surrounded by Pn corresponds to the second display area 16b. Next, processing in a movement processing step 21 is performed. That is, in the case of downward scrolling as described above, as shown in FIG. 9, only within the second display area 16b, the content in the area is moved down by one line, and then the content in the second display area 16b is moved downward. The new line content retrieved from the second document in the main memory is displayed in the space 17 created in the first line, and the intended scrolling process is completed. At this time, the first and third
It should be noted that the display areas 16a, 16c and the fixed display area 14 have not changed at all. still,
If the execution key is then operated repeatedly, the same downward scrolling will be performed by the number of times the execution key is operated.

In the above example, the scroll process is performed in the second display area 16.
In order to limit the area to b, the cursor was placed at points Pi and P and the respective coordinates were set, but if such area limitation is not required, area limitation is done based on each coordinate set at the time of initialization. . That is, by operating the downward scroll key and then the execution key, it is seen that no cursor movement processing has been performed in advance, and the movement processing step 21 is immediately executed, and the document display area 15 is moved as shown in FIG. Scroll processing is performed only within. At this time, the fixed display area 14 does not change at all.

Also, the above example deals with downward scrolling, but other scrolling processes (upward, leftward,
The same applies to rightward scrolling, etc.). When inserting or deleting a line, which is another example of specific screen processing, specify the line insertion position or line deletion position with the cursor in advance, and then operate the line insertion position key or line deletion position key on the keyboard. Next, the area can be limited by moving the cursor and operating the line insertion or line deletion key in the same way as during scroll processing, and finally, the execution key can be operated. At this time, in the case of row insertion, only within the limited area, the row below the pre-specified row insertion position is moved down by one line, creating a space at the row insertion position. Therefore, if characters are then input using a keyboard or the like, the input characters will be displayed in the above space. In addition, in the case of line deletion, the line content at a pre-designated line deletion position is deleted only within the limited area, and the line content below it is moved up by one line. It goes without saying that the contents of the corresponding document area in the main storage section 12 also change during the line insertion and line deletion processes.

In addition, in the above embodiment, area limitation is limited to keyboard 1.
The cursor specified coordinates by 0 operation or P _I or
This is done using fixed coordinates as shown by P _L , but
It can also be determined using the line frame on the screen. That is, as shown in FIG. 10, when a frame is displayed by lines 30, 30, . It can also be limited.

As is clear from the above description, according to the present invention, when performing processing that involves moving lines on the screen, the processing can be executed only within the required screen area, thereby reducing processing time and increasing processing speed. Even on slow devices, display flickering on the screen will almost never occur.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the contents stored in the main memory section. FIG. 2, FIG. 3, and FIG. 4 are diagrams showing display screens. FIG. 5 is a block circuit diagram of an embodiment of the present invention. FIG. 6 is a diagram showing the display screen. FIG. 7 is a diagram showing the flow of the program. Figures 8 and 9
10 are diagrams showing the display screen. 10...keyboard, 11...control unit, 12...
...Main storage section, 13...Screen display section.

Claims (1)

[Claims] 1. A storage unit 12 that stores the contents of a plurality of documents;
Screen display section 13 that displays the contents of this storage section 12
and to display one of the plurality of documents,
In a scrolling method of a document device including a rectangular area 16b that is set on the screen display section 13 by dividing the screen display section 13 in the row direction and displayed as a line frame within the screen, during the scrolling process, The area 16b within the line frame where the cursor is located is the target of this scrolling process, and the contents within this area 16b are moved by line without moving the lines 16a and 16c outside this area, and the contents caused by this line movement are A scrolling method for a document device, characterized in that line contents extracted from the document corresponding to the area 16b of the storage section 12 are displayed in a space 17.