JPH07168950A - Picture editing method - Google Patents

Abstract

PURPOSE:To improve the operability by restoring a display state before the application of editing processing based on erroneous input, etc., in return to the erroneous input, etc., of a user. CONSTITUTION:Every time an editing command is inputted from a keyboard 4, the stored contents of a picture buffer memory 10 are saved to an auxiliary picture buffer memory 10a, and simultaneously, the stored contents of the auxiliary picture buffer memory 10a are saved into the auxiliary picture buffer memory 10b. In the case that the user desires to restore the display state before the application of editing, when a reset instruction is inputted from the keyboard 4, the stored contents of the auxiliary picture buffer memory 10a and the auxiliary picture buffer memory 10b are copied in the picture buffer memory 10 alternately in accordance with the number of times of input. By inputting the reset instruction, a picture state before the erroneous input can be easily restored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen editing device in a data processing device such as a computer device having a display device.

[0002]

2. Description of the Related Art A data processing device such as a computer device having a display device is configured so that the processing information can be easily confirmed by displaying various processing information on a display screen. There are various kinds of display information such as characters, symbols, figures, images, etc., which are displayed on the display screen as necessary. Further, the data processing device equipped with this type of display device does not only display information on the display screen. The information displayed on the display screen is editable in various states on the display screen. That is, this type of device has a screen editing function, and various editing operations such as correction, addition, insertion, and deletion can be performed on the information displayed on the display screen.

In order to display various kinds of information on the display screen of the display device, the data processing device has a screen display information storage means corresponding to the display screen. The stored contents of the screen display information storage means are sequentially read by the display control means and displayed on the display screen. Therefore, when editing. The display information can be edited in a desired state by rewriting the stored contents of the screen display information storage means.

References for this type of editing technique are disclosed in JP-A-60-51938 and JP-A-58-9982.
9, JP-A-58-94027, JP-A-58-703.
There is number 49.

[0005]

The conventional data processing device provided with the screen editing device is extremely effective in operation since its editing operation can be performed in correspondence with the display screen or the like.

However, the conventional ones lack sufficient consideration for the operability against erroneous editing by the operator, which causes a problem in the operation in this recovery. For example, if the characters, figures, etc. entered by the operator are erroneous,
Although it is necessary to restore the display screen to the state before the erroneous input, this requires an operation of deleting the erroneously input characters, figures, and the like. Especially regarding the figure input, if the newly input figure overlaid on the already displayed figure is an erroneous input, erasing the erroneously input part will delete the part already displayed. In many cases, it was difficult to return to the previous state where there was an erroneous input. Further, in many cases, it is possible to input a figure in dot units, and when erasing an erroneous input portion, operations such as specifying the position of the figure to be erased are troublesome.

The object of the present invention is to easily return the display information to the state immediately before the erroneous input, in response to the erroneous input,
An object is to obtain a screen editing device that can improve operability.

[0008]

A display screen for displaying a desired image as a whole by a large number of dots, and a display device for displaying various information such as characters, symbols, figures and images on the display screen are provided. The data processing device includes a screen buffer memory that corresponds to the display screen and stores image information on the display screen. The stored contents of the screen buffer memory are read out by the display control means and displayed on the display screen. Therefore, various edits such as correction, deletion, insertion and addition can be performed by changing the stored contents of the screen buffer memory. For this reason, an edit command input means for commanding the editing is provided. Therefore, in the present invention, the image information resulting from the predetermined editing is stored in the buffer memory, and the auxiliary screen buffer memory corresponding to the screen buffer memory and the editing command from the editing command input means are stored. In response to this, image information copying means for copying and storing the contents of the screen buffer memory at that time in the auxiliary screen buffer memory is provided. Further, a restore command input means for requesting copying of image information from the auxiliary screen buffer memory to the screen buffer memory, and image information is copied and stored from the auxiliary screen buffer memory to the screen buffer memory in response to the restore command. And a display information restoring means for performing.

[0009]

In order to edit the image information displayed on the display screen, when a desired edit command is input from the edit command input means, the image information copy storage means responds to this edit command and a predetermined edit is performed. The stored contents of the screen buffer memory storing the resulting image are copied to the auxiliary screen buffer memory. As a result, the edit command can be stored in the display information path auxiliary screen buffer memory immediately before being reflected on the display screen. Then, the display image information stored in the auxiliary screen buffer memory is copied and stored in the screen buffer memory by the return command inputting means by inputting the return command.

Therefore, after performing a desired editing operation,
For a request for returning the image information before the editing due to some reason such as erroneous editing, the display information can be returned to the state before the editing by a simple operation of inputting a return command.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below.

FIG. 2 is a block diagram showing the overall configuration of a computer device generally called a personal computer or a business computer. In this figure, 1 is a cathode ray tube display device having a display screen SC (hereinafter, simply referred to as CRT), 2 is a random access storage device (hereinafter, abbreviated as RAM), 3 is a microprocessor as an arithmetic processing unit, 4 Is a keyboard constituting an input unit, and 5 is a read-only storage device (hereinafter, ROM
Is abbreviated. ). Reference numeral 6 is a clock transmission circuit for generating a clock signal serving as a reference for operation, 7 is a timing control circuit, 8 is a character font ROM, 9 is a CRT control circuit which constitutes a display control means, and 10 is a screen display information storage means. The screen buffer memory 11 is a parallel / serial conversion circuit. A screen editing processing program as a screen editing processing means for realizing the screen editing function is stored in advance in the RAM 2 and the ROM 5. This screen editing processing program is not special and is generally used conventionally. The outline is as follows. That is, when information for various edits is input from the keyboard 4, this screen edit processing program causes
The microprocessor 3 operates based on the program, and the display information processed by the microprocessor 3 is stored in the screen buffer memory 10. At this time, information such as characters is developed into a character font in the character font ROM 8 and transferred and stored in the screen buffer memory 10. Thereafter, similarly, the microprocessor 3 responds to the input from the keyboard 4 based on the screen editing program and transfers and stores the processed display information to the screen buffer memory 10. The clock transmission circuit 6 inputs a basic pulse so that the microprocessor 3 operates regularly.

On the other hand, the basic clock pulse from the clock transmission circuit 6 is also input to the CRT control circuit 9. CR
Upon receiving this basic pulse, the T control circuit 9 sequentially reads the display information stored in the screen buffer memory 10 from the screen buffer memory 10. The read display information is converted into a pulse train through the parallel / serial conversion circuit 11. This pulse train is input to the CRT 1 as a video signal v. CRT for CRT1
The synchronizing signal s output from the control circuit 9 is also input together with this. With these signals, the CRT 1 brightly lights the dot at the corresponding position of the CRT 1 when the video signal v has a high level voltage. This is the synchronization signal s
Based on the above, the display screen of CRT1 is scanned from the upper left to the right, and then the column is also scanned from left to right, and all the dots on the display screen of CRT1 are displayed. Therefore, C
The RT control circuit 9 sequentially fetches the display information in the screen buffer memory 10 from the upper left of the CRT 1 to the right, and then the display information of the next row, and sends it to the parallel / serial conversion circuit 11. Therefore, the CRT control circuit 9 generates a memory address for the screen buffer memory 10 so that the display information can be taken out in the above-described order.

A floppy disk device 13 constitutes an external storage device, which is connected to the microprocessor 3 via a floppy disk controller 12.
As a result, various programs created or display information in the screen buffer memory 10 can be stored in the floppy disk device 13 as needed. In addition, the stored data such as programs and display information is called as needed, stored in the storage unit such as the RAM 2 or the screen buffer memory 10, and can be a target of processing.

In the above-described structure, in this embodiment, the auxiliary screen buffer memories 10a, 10a, 10a, 10b correspond to the screen buffer memory 10 as the screen display information storage means.
b is provided. This auxiliary screen buffer memory 10a, 10
Each of b has the same storage capacity as the screen buffer memory 10, and the storage contents of the screen buffer memory 10 can be copied and stored. The keyboard 4 is provided with various keys for inputting information for instructing various edits such as correction, deletion, insertion and addition to the above-mentioned screen editing program. These edit command keys act as edit command input means. Further, in the present embodiment, a return command key which functions as a return command input means is arranged on the keyboard 4. The keyboard 4 generally includes a large number of alphanumeric keys, special keys and the like. The return command may be provided on the keyboard 4 or may be assigned to a key already provided.

FIG. 1 shows a screen buffer memory in response to the input of various edit command keys arranged on the keyboard 4 constituting the edit command input means and the return command key arranged on the keyboard 4 constituting the return command input means. 10 is a flowchart showing an example of a screen information control means for controlling and operating the storage contents of the auxiliary screen buffer memories 10a and 10b in a predetermined state. The screen information control means is mainly composed of a display information copying means STM and a display information restoring means. The screen information control means shown in FIG. 1 has a RAM 2 in the form of a program, similar to the screen editing program described above.
Alternatively, it is stored in advance in the ROM 5 and is read and executed by the microprocessor 3. Then, a predetermined function is achieved by this execution.

The display information copying means STM is means for responding to an edit command key arranged on the keyboard 4 and copying and storing the contents stored in the screen buffer memory 10 at that time point in the auxiliary screen buffer memories 10a and 10b. This embodiment shows a case where two sets of auxiliary screen buffer memories, that is, an auxiliary screen buffer memory 10a and an auxiliary screen buffer memory 10b are provided, and therefore the display information copying means is the first display information copying means STMa. The second display information copying means STMb. That is, the first display information copying means STMa changes the storage contents of the auxiliary screen buffer memory 10a to the auxiliary screen buffer memory 1a.
0b, and the second display information copying means STMb copies and stores the contents stored in the screen buffer memory 10 into the auxiliary screen buffer memory 10b. As a result, the auxiliary screen buffer memories 10a and 10b are ranked, and as the editing operation progresses, the contents stored in the screen buffer memory 10 at a certain point of time are higher in rank.
a, the auxiliary screen buffer memory 10b in the lower order is sequentially copied and stored. FIG. 3 shows the first display information copying means STM.
4 is a flowchart showing a, and FIG. 4 is a flowchart showing the second display information copying means STMb.

The display information restoring means SRM responds to a restoration command key arranged on the keyboard 4 and stores the contents stored in the auxiliary screen buffer memories 10a and 10b in the screen buffer memory 10.
It is a means for copying and storing in the. In this embodiment, the auxiliary screen buffer memory 10 is operated by the number of times the return command key is operated.
It shows a case where the stored contents of a and 10b can be alternately copied and stored in the screen buffer memory 10.
FIG. 5 is a flow chart showing the details of the display information restoring means SRM 'which is a main part of the display information restoring means SRM.

The screen information control means shown in FIG. 1 will be described in detail below. When the means is activated, first, initial settings are performed in steps 1a, 1b and 1c. That is, in step 1a, the stored contents of the screen buffer memory 10 are copied and stored in the auxiliary screen buffer memory 10a, and in step 1b, the stored contents of the auxiliary screen buffer memory 10a are copied and stored in the auxiliary screen buffer memory 10b. This is the second display information copying means S which will be described in detail later.
This is achieved by activating TMb in step 1a and activating the first display information copying means STMa in step 1b. In step 1c, a screen buffer pointer BP designating one of the auxiliary screen buffer memories 10a and 10b is set, and this is initially set to "0".
Then, in step 1d, the input of the edit command key arranged on the keyboard 4 is awaited. If any edit command key is input here, it is determined in the following step 1d whether or not the command is an edit end key. If this is an edit end key, the process of the screen information control means is ended. .
If not, it is determined in step 1f whether this input is a screen restoration command. If the command is not the screen return command, it means that the input key is the edit command key, so the process proceeds to step 1g, where "0" is set to the screen buffer pointer BP. Data such as characters for the keys input from the keyboard 4 in step 1d is temporarily stored in the keyboard buffer. Step 1h
Then, if data remains in the keyboard buffer, the process returns to step 1d. This step 1h
Is particularly effective when inputting Japanese, that is, a character string to be input at a predetermined position on the screen is input into the keyboard buffer using the keyboard 4, and is displayed on the bottom line of the display screen SC, for example. This is because if steps 1i and 1j to be described later are executed at the stage, it will be impossible to return to the screen before inputting the character string.

If no data such as characters remains in the keyboard buffer at step 1h, the process is moved to the display information copying means STM. The display information copying means STM comprises the first display information copying means STMa and the second display information copying means STMb as described above. First, the first display information copying means STMa shown in step 1f copies and stores the stored contents of the auxiliary screen buffer memory 10a in the auxiliary screen buffer memory 10b. The second shown in the following step 1j
The display information copying means STMb has a screen buffer memory 10
The stored contents of is copied and stored in the auxiliary screen buffer memory 10a. Then, in step 1k, the screen edit processing means EDT
Is started, and a predetermined edit is performed on the screen buffer memory 10. When the processing of the screen editing processing means EDT is completed, the processing moves to step 1d and waits for the input of the next editing command.

Step 1i and step 1j are step 1
Every time an edit command is input from the keyboard 4 in d, the edit command is executed, and is executed before the execution of the edit command. Then, after executing steps 1i and 1j,
Predetermined screen editing is performed by step 1k. Therefore, predetermined screen editing is performed in step 1k.
Therefore, after step 1k is executed, the screen edit information after the predetermined edit is stored in the screen buffer memory 10, and the screen display information before the edit is made in the auxiliary screen buffer memory 10a. Will be remembered.

When it is determined that the command input in step 1f is the screen restoration command, the processing is the display information restoration means S.
Move to RM. First, in step 1l, 1 is added to the screen buffer pointer BP. Then, in step 1m, it is determined whether or not the content of the screen buffer pointer BP exceeds 2, and if not, the process proceeds to step 1n. In step 1n, the display information restoring means SRM 'which constitutes the main body of the display information restoring means SRM is activated.

The display information restoring means SRM 'copies and stores the stored contents of the auxiliary screen buffer memories 10a and 10b indicated by the screen buffer pointer BP in the screen buffer memory 10, as will be described later in detail. In the case of this embodiment, if the screen buffer pointer BP is 1, it indicates the auxiliary screen buffer memory 10a, and if it is 2, it indicates the auxiliary screen buffer memory 10b. When the value of the screen buffer pointer BP exceeds 2 in step 1m, this value is forcibly set in step 1o, and then the process proceeds to step 1n.

The screen buffer pointer BP is set to the step 1
It is set to zero with c and 1g. When the screen return instruction key arranged on the keyboard 4 is pressed after execution of a certain edit instruction, the value of the screen buffer pointer BP becomes "1" in step 11. As a result, in step 1n, the contents stored in the auxiliary screen buffer memory 10a are copied and stored in the screen buffer memory 10.

This means that the contents of the screen buffer memory 10 are rewritten to the screen information before the editing executed before the screen return command key is pressed. If you press the screen restore command key again continuously,
The value of the screen buffer pointer BP is “2” in step 11
Becomes As a result, in step 1n, the contents stored in the auxiliary screen buffer memory 10b are copied and stored in the screen buffer memory 10. This means that the screen display information before the previous editing is executed is copied and stored in the screen buffer memory 10. When the screen restore command key is pressed continuously, the value of the screen buffer point BP becomes "3". Then, in step 1o, the value of the pointer BP is reset to "1", and in step 1n, the contents stored in the auxiliary screen buffer memory 10a are copied and stored in the screen buffer memory 10 again. That is, when the screen restore command key is continuously pressed, the auxiliary screen buffer memory 10a and the auxiliary screen buffer memory 10 are stored in the screen buffer memory 10.
The stored contents of b are alternately copied and stored.

FIG. 7 shows an example of a specific operation. In this example, the straight line L1 and L
Although a triangle is drawn on the display screen at 2 and L3, the screen buffer memory 1 at each time point when the display screen needs to be returned to the screen at which the straight line L1 is drawn for some reason
0, the storage contents of the auxiliary screen buffer memories 10a and 10b are illustrated.

First, at the initial time, no display information is stored in the buffer memories 10, 10a, 10b.

When the editing of the straight line L1 is completed at a certain time point n and the editing command is input to edit the straight line L2,
By the steps 1i and 1j of step 1, the contents stored in the buffer memory 10a are stored in the buffer memory 10b and
The content of 0 is copied and stored in the buffer memory 10a. After that, straight line editing is executed in step 1k. Time point (n
+1) indicates the storage contents of the respective buffer memories 10, 10a, 10b immediately after the editing of the straight line L2.

Similarly, at the time point (n + 2), the buffer memories 10 and 10 immediately after the editing of the straight line L3 is executed.
The stored contents of a and 10b are shown. After editing the straight line L3, notice any mistake and press the return command key arranged on the keyboard 4 once to display information return means SR of FIG.
By the action of M, the stored contents of the buffer memory 10a are copied and stored in the buffer memory 10.

Time point (n + 3) shows the contents stored in the screen buffer memory 10 at this time. When the return command key is pressed again in succession, the contents stored in the buffer memory 10b are copied and stored in the buffer memory 10. Time point (n + 4) shows the stored contents of the screen buffer memory 10 at this time.

Thereafter, each time the return command is pressed, the time (n
The states of +3) and (n + 4) are repeated. Therefore, if it is desired to start editing from the state at the time point (n + 3), it is sufficient to input an edit command after the display screen is displayed, and if it is desired to resume editing from the state at the time point (n + 4). The edit command may be input after the display screen is displayed.

FIG. 3 is a flow chart showing the details of the first display information restoring means STMa shown in steps 1b and 1i in FIG. This figure will be described below.

The first display information copying means STMa is means for copying and storing the stored contents of the auxiliary screen buffer memory 10a in the auxiliary screen buffer memory 10b as described above. When the first display information copying means STMa is activated, first, in step 3a, the auxiliary screen buffer memory 1
In order to sequentially read the display information stored in 0a, the read address pointer P1 for sequentially scanning and designating each address of the auxiliary screen buffer memory 10a is initialized. That is, this is a step of setting the head address of the auxiliary screen buffer memory 10a in the address pointer P1.

In step 3b, since the display information read from the auxiliary screen buffer memory 10a is sequentially written in the auxiliary screen buffer memory 10b, the write address pointer P2 for sequentially scanning the write address of the auxiliary screen buffer memory 10b is initialized. That is, this is a step of setting the head address of the auxiliary screen buffer memory 10b in the address pointer P2.
In the following step 3c, it is determined whether or not the address pointers P1 and P2 have exceeded the final address of the corresponding auxiliary screen buffer memories 10a and 10b, that is, the address pointers P1 and P2 correspond to the auxiliary screen buffer memories 10a and 10b.
It is determined whether or not all the addresses 10b have been designated for scanning.

In step 3d, the display information stored in the address designated by the address pointer P1 of the auxiliary screen buffer memory 10a is read, and this display information is written in the address designated by the address pointer P2 of the auxiliary screen buffer memory 10b. At step 3e, the address stored in each of the address pointers P1 and P2 is set to "1".
Only increase. Then, the process proceeds to step 3c.

Thereafter, steps 3c, 3d, 3e are repeatedly executed, and at step 3c, the address pointers P1, P
Whether the stored address of 2 exceeds the final address of the corresponding auxiliary screen buffer memories 10a and 10b, that is, until each address pointer P1 and P2 scans and specifies all the addresses of the corresponding auxiliary screen buffer memories 10a and 10b. To do. Then, when the condition of step 3c is satisfied, the processing of the first display information copying means STMa is ended. As a result, the auxiliary screen buffer memory 10a
Is stored in the auxiliary screen buffer memory 10b.

FIG. 4 is a flow chart showing the details of the second display information copying means STMb shown in steps 1a and 1j in FIG. This figure will be described below. As described above, the second display information copying means STMb stores the contents stored in the screen buffer memory 10 in the auxiliary screen buffer memory 10a.
It is a means for copying and storing in the.

When the second display information copying means STMb is activated, first, at step 4a, a read address pointer P0 for sequentially scanning and designating each address of the screen buffer memory 10 is initialized. This is a step of setting the head address of the screen buffer memory 10 in the address pointer P0.

In step 4b, since the display information read from the screen buffer memory 10 is sequentially written in the auxiliary screen buffer memory 10a, the write address pointer P1 for sequentially scanning and designating the write address of the auxiliary screen buffer memory 10a is initialized. This means that
The auxiliary screen buffer memory 1 is assigned to the address pointer P1.
This is a step of setting the leading address of 0a. In the following step 4c, whether or not each address pointer P0, P1 has exceeded the final address of the corresponding buffer memory 10, 10a, that is, all addresses of the buffer memory 10, 10a corresponding to each address pointer P0, P1 are designated for scanning. Or not.

In step 4d, the screen buffer memory 10
The display information stored in the address designated by the address pointer P0 of 1 is read, and this display information is written in the address designated by the address pointer P1 of the auxiliary screen buffer memory 10a. At step 4e, the address stored in each address pointer P0, P1 is incremented by "1". Then, the process proceeds to step 4c.

Thereafter, steps 4c, 4d and 4e are repeatedly executed, and at step 4c, the address pointers P0 and P
The buffer memory 10 corresponding to the stored address of 1,
This is performed until all the addresses of 10a are designated for scanning. Then, when the condition of step 4c is satisfied, the processing of the second display information copying means STMb is ended. This allows
The contents stored in the screen buffer memory 10 are copied and stored in the auxiliary screen buffer memory 10a.

FIG. 5 is a flow chart showing the details of the display information restoring means SRM 'shown at step 1n in FIG. This figure will be described below.

The display information restoring means SRM 'is means for copying and storing the contents stored in the auxiliary screen buffer memories 10a and 10b designated by the screen buffer pointer BP in the screen buffer memory 10 as described above. When the display information restoring means SRM 'is activated, first, in step 5a, the display information stored in the auxiliary screen buffer memories 10a and 10b designated by the screen buffer pointer BP is sequentially read, so that the auxiliary screen buffer memory is read. 10
A read address pointer (BP) for sequentially scanning and designating addresses a, 10b is initialized. That is, this is a step of setting the head address of the screen buffer memories 10a and 10b in the address pointer (BP).

In step 5b, the screen buffer memory 1
In order to sequentially write the display information read from the auxiliary screen buffer memories 10a and 10b to 0, the write address pointer P0 that sequentially scans and specifies the write address of the screen buffer memory 10 is initialized. That is, this is the step of setting the start address of the screen buffer memory 10 to the address pointer P0.

In the following step 5c, the buffer memories 10 and 10 corresponding to the respective address pointers P0 and P (BP).
It is determined whether or not the end address of a, 10b has been exceeded, that is, whether or not all the addresses of the buffer memories 10, 10a, 10b corresponding to the respective address pointers P0, P (BP) have been designated for scanning.

In step 5d, the display information stored in the address designated by the address pointer P (BP) of the auxiliary screen buffer memories 10a, 10b is read, and this display information is addressed by the address pointer P0 of the screen buffer memory 10. Write in. In step 5e, the address stored in each address pointer P0, P (BP) is incremented by "1".

Then, the process proceeds to step 5c. After that, steps 5c, 5d, and 5e are repeatedly executed, and the buffer memories 10 and 10a corresponding to the addresses stored by the respective address pointers P0 and P (BP) in step 5c.
Whether or not the end address of 10b is exceeded, that is, until all the addresses of the buffer memories 10, 10a, and 10b corresponding to the respective address pointers P0 and P (BP) are scanned and designated. Then, when the condition of step 5c is satisfied, the processing of the display information restoring means SRM 'is ended.

As a result, the contents stored in the auxiliary screen buffer memories 10a and 10b designated by the screen buffer pointer BP are copied and stored in the screen buffer memory 10, and the screen information is returned to the screen buffer memory 10.

FIG. 6 is a flow chart showing the screen edit processing means EDT shown in step 1k in FIG. This screen editing processing means EDT is not special and has been used conventionally, and this figure shows its outline.

This means EDT is activated before it is activated.
It is assumed that the instruction code of the edit instruction input in step 1d is stored and stored in the storage unit OPIN.
Further, the screen edit processing means EDT has, for example, 10 types of edit processing, and the storage unit Nmax stores this number "
10 "is set.

Here, for example, a straight line input process is set in the edit process 1, a circle input process is set in the edit process 2, each edit process is similarly set, and a display screen clear process is set in the edit process 10. And

Now, for example, when a circle is drawn on the display screen SC and the edit key corresponding to the circle input is pressed, the instruction code is stored in the memory OPIN in step 1d of FIG. 1, and in step 1k of FIG. The screen edit processing means ED
T is activated. Storage units OP1, OP2, ..., OP
Command codes corresponding to the editing processes 1, 2, ..., 10 described above are registered in advance in 10.

First, in step 6a, the search pointer j for searching for this editing process is set to "1". In step 6b, if the stored content of the search pointer j and the stored content of the storage unit Nmax are exceeded, the processing of the screen edit processing means EDT is ended. If not exceeded, the stored contents of the storage unit OPIN and the stored contents of the storage unit OPj are compared in step 6c. An instruction code for the editing process j is stored and stored in the storage unit OPj. Therefore, if the instruction code stored in the input storage unit OPIN and the contents of the storage unit OPj are the same, the edit process j is executed in step 6d. Next, in step 6e, the stored content of the search pointer j is incremented by "1", and the process is returned to step 6b. Steps 6b, 6c, 6d, 6
In e, the content of the storage unit OPIN is equal to the content of the storage unit OPj
The processing is ended after the comparison is performed 0 times, but when the edit key corresponding to the circle input is pressed, the contents of the storage unit OPIN and the contents of the storage unit OP2 become equal, and therefore, the editing process 2 according to the instruction, That is, the editing process for the circle input is executed. By this editing process, the contents of the screen buffer memory 10 are rewritten to a predetermined state and displayed on the display screen SC.

As described above, according to the embodiment, each time an edit command is input from the keyboard 4, the edit command is saved in the screen buffer memory 10 before execution of the edit.
The stored contents of the auxiliary screen buffer memory 10a are saved in the auxiliary screen buffer memory 10b. Then, after that, a predetermined editing operation is executed on the screen buffer memory 10. When the screen restoration command key arranged on the keyboard 4 is pressed, one of the auxiliary screen buffer memories 10a and 10b is selected according to the number of acupressures, and the stored contents are restored to the screen buffer memory 10. Therefore, after the editing operation is performed, the mistake in the editing is noticed, and the error can be returned to the state before the editing is performed by an extremely simple operation of pressing the screen return command key arranged on the keyboard 4. Then, in order to continue the editing operation, a predetermined editing operation may be executed after the display screen returns to the previous state.

Further, according to the embodiment, since the contents of the screen buffer memory 10 corresponding to the display screen are saved and restored, if the contents can be displayed on the display screen,
The present invention can be applied to various display information such as image information as well as characters, symbols and graphic information.

In the above embodiment, the case where two auxiliary screen buffer memories as auxiliary screen display information storage means are provided has been described as an example, but the number may be one, or three or more. It may be. In the present invention, this number is not limited and can be arbitrarily selected according to the type of device or the like. Further, as the display device, the CRT display device has been described as an example, but various devices such as a liquid crystal display device can also be used.

Further, the edit command input means and the return command input means have been described by taking the case where the keys arranged on the keyboard 4 are used as an example, but the form and the arrangement position of these are arbitrary and can be easily as necessary. It can be changed. Furthermore, display information copying means STM and display information restoring means SRM
Also, for the sake of convenience of description, only the configuration that is easy to understand is shown as an example, and it may be a configuration in which the efficiency and the like are further improved, in other words, as long as it achieves a predetermined function, other configurations can be used. It may be one.

[0058]

As is apparent from the above description, according to the present invention, although the image information resulting from the predetermined editing is stored in the screen buffer memory,
In response to an erroneous input by the operator, the image information can be easily returned to the state immediately before the erroneous input, and a screen editing device with improved operability can be obtained. Further, when copying the screen buffer memory to the auxiliary screen buffer memory, since it is automatically performed by the edit command from the edit command input means, it is not necessary for the operator to be aware of saving the data before the erroneous operation. From the point of view, it is possible to reduce the burden on the operator.

[Brief description of drawings]

FIG. 1 is a process flowchart showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an overall configuration when the present invention is applied to a computer device.

FIG. 3 is a flowchart showing an embodiment of the display information copying means in the present invention.

FIG. 4 is a flowchart showing an embodiment of the display information copying means in the present invention.

FIG. 5 is a flowchart showing an embodiment of display information restoration means.

FIG. 6 is a flowchart showing an embodiment of an edit processing means.

FIG. 7 is a transition diagram illustrating the storage contents of each buffer memory in one operation of the embodiment.

[Explanation of symbols]

1 display device 4 keyboard (edit command input means, return command input means) 9 display control means 10 screen display information storage means 10a, 10b auxiliary screen display information storage means STM display information copying means SRM display information restoring means

Claims (1)

[Claims] 1. A display device having a display screen for displaying a desired image as a whole by a large number of dots, and a screen information storage means for storing image information by a large number of storage sections corresponding to the respective dots of the display device. The image information stored in the screen information storage means is sequentially read, and display control means for displaying a desired image on the display screen based on the read image information, and image information displayed on the screen are stored. A screen editing apparatus comprising: edit processing means for editing the stored contents in the screen information storage means; and edit command means for issuing an edit command to the edit processing means, which corresponds to the screen information storage means. The first and second auxiliary screen information storage means, and the first or second auxiliary screen information storage means.
Screen information copying means for copying and storing the stored contents in the auxiliary screen information storing means, and for storing the stored contents in the screen information storing means from the first or second auxiliary screen information storing means. It has a screen information restoration means and a restoration instruction input means for inputting a restoration instruction to the screen information restoration means, and when there is an editing instruction from the editing instruction means, the screen information copying means is means for storing the screen information storage. The storage content of the means is copied and stored in the first auxiliary screen information storage means, and the storage content before the editing processing means edits the stored content is copied and stored in the second auxiliary screen information storage means. However, when a return instruction is input from the return instruction input means, the screen information restoration means is configured to perform the first and the previous operations each time the return instruction is input from the return instruction input means. Screen editing method characterized by copying stored in the screen information storage means storing the contents of the second auxiliary screen information storage means alternately.