JPH096981A - Drawing production and editing device - Google Patents

Abstract

PURPOSE: To restore an optional state such as a state that is kept before the production/editing processing is carried out even in a state where the production/ editing processing is canceled and rewritten. CONSTITUTION: An input control part 4 of a CAD processor 2 analyzes the contents of instructions received from an input device 1. Then a production/ editing processing part 5 carries out the instructions which are analyzed at the part 4. A history control part 7 stores those analyzed instructions, the data on coordinates, etc., in a history storage part 8. When an undo or redo instruction is received from the device 1, the part 4 sends these instructions to the part 7. At the same time, the part 5 carries out or cancels the history based on the information stored in the part 8. The processing results of the part 5 are displayed on a display device 3 under the control of a display control part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing creating / editing apparatus, and more particularly to a CAD (Computer Aided) for creating and editing drawings such as circuit diagrams and waveform diagrams.
Design) system.

[0002]

2. Description of the Related Art Conventionally, in this type of CAD system, since a plurality of operations are executed and data is restored by going back to an arbitrary operation, a figure created or edited by a drawing / editing processing section of a CAD processing section It has an element database that stores element data and the like.

In this case, the drawing / editing processing unit of the CAD processing unit interprets the command input from the input device, and creates or edits the graphic element data and additional information based on the result.

The created or edited graphic element data, additional information, and the like are sent from the display control unit to the display device for display, and also output from the drawing output control unit to a drawing output device such as a plotter for printing. .

The graphic element data and additional information created or edited by the drawing / editing processing unit are written in the element database by the writing / reading control unit. The writing / reading control unit also controls reading of graphic element data and additional information from the element database.

As shown in FIG. 13, the element database is composed of an ent node A1, a segment A2, a point database A3, an ANDO stack A4, and a REDO stack A5.

The ent node A1 has an element number "1",
“2”, “3”, “4”, ..., Addresses to segment A2 “AD1”, “AD2”, “AD3”, “AD
4 ”, ..., Element data“ Line ”,“ Circl ”
e ”and the like are stored.

The segment A2 is a straight line end point "P1 (start point)", "P2 (end point)", "P3", "P4" or each point "P5 (center)", "P4 (start point)", " P6 (end point), "V1 (major axis)", "V2 (minor axis)", and indexes of data such as vectors are stored.

The point database A3 stores coordinate values "X1, Y" indicated by the segment index.
1 ”,“ X2, Y2 ”,“ X3, Y3 ”,“ X4, Y
4 ”,“ X5, Y5 ”,“ X6, Y6 ”,“ X7, Y
7 ”,“ X8, Y8 ”, ...

The ANDO stack A4 cancels the executed operation and restores the data before the execution of the operation.
Predetermined information "N" of the ent node A1 for returning to 1
o. , "AD", "TYP" are stacked. Note that the ANDO stack A4 also stores pointers to ANDO nodes that are stored in a chain, and supports multi-operation.

The redou stack A5 stacks predetermined information "No.", "AD", "TYP" of the ent node A1 for returning to the ent node A1 at the time of redo (REDO) for restoring the data before executing AND. .

In the CAD system described above, after performing the operation 1 to several times, the undo operation can be performed 1 to several times, and the redo operation capable of returning to the state in which the undo operation is not performed is also possible. Has become.

The ent node A1 is a data area in which a set of element data forming a figure is stored in order, and when the operation is executed, the data of the ent node A1 is saved in the AND stack A4, and the ent node A1 is stored.
The element data generated by executing the operation is stored in. This operation is repeated every time the operation is executed.

FIG. 14 shows a state in which this operation is performed twice and then the AND operation is performed once. In this case, there is a "NULL" code in the ent node A1 indicating that there is nothing before the operation is executed.

When a line drawing operation is performed, the element type "Line" is added to the ent node A1.
The element including the address "AD1" is written to the segment A2, and the ent node A is written in the ANDO stack A4.
The "NULL" code contained in 1 is stacked.

When the line drawing operation is performed twice, the element 2 including "Line" is included in the ent node A1.
One is written. This indicates that there are two straight lines in the drawing. The "NULL" code stored in the entry node A1 is stacked in the AND stack A4 by two elements.

When an AND command is input from the input device, the data ("2", "AD2", Line) stored at the end of the entropy node A1 is transferred to the redou stack A.
5, the data ("NULL" code) saved in the AND stack A4 is restored to the ent node A1.

Then, the element stored in the ent node A1 becomes one of the element type "Line" as shown in FIG. This is equivalent to the state immediately after the first operation.

After that, when a REDO instruction is input from the input device, the data ("NULL" code) stored at the end of the ent node A1 is transferred to the end stack A4.
The data (“2”, “AD2”, Line) saved in the redou stack A5 to the ent node A1.
Return to.

The technique relating to the above element database is described in detail in Japanese Patent Laid-Open No. 5-324555.

[0021]

SUMMARY OF THE INVENTION The conventional CAD described above
In the system, it is possible to cancel multiple operations even after performing multiple operations by executing the AND instruction, and canceling the AND instruction by executing the REDO instruction, that is, canceling multiple operations. It is possible to cancel the processing itself.

In the above method, the contents of the ent node are stacked on the redou stack when the AND instruction is executed, and the contents of the redou stack are cleared when the drawing / editing operation is performed, so only the drawing / editing operation is performed. Immediately after execution, the REDO instruction cannot be executed.

That is, when a drawing is created to a certain state and it is desired to rewrite a part of the drawing, it is necessary to return to the position to be rewritten by AND processing. However, after rewriting, even if it is desired to return to the state before rewriting. , You can only return to the point when you returned with Ando processing.

Therefore, an object of the present invention is to solve the above problems and to restore an arbitrary state such as the state before the cancellation of the drawing / editing process even when the drawing / editing process is canceled and rewritten. An object is to provide a drawing creation / editing device.

[0025]

A drawing creation / editing apparatus according to the present invention is a drawing creation / editing apparatus for performing drawing creation processing and editing processing, and the contents of the processing each time the drawing creation processing and editing processing are performed. Storing means for storing the drawing, and the storage position in the storing means of the processing content of the current processing every time the drawing creation processing and the editing processing are performed and the previous processing and the next processing performed continuously before and after the current processing. A storage unit that stores the history information of the process and the storage position of the history information of the change process with respect to the current process continuously performed after the next process in association with each other as history data, and the change process. Storage means for storing the history information of the current processing, and holding means for holding the storage position of the history information of the canceled processing during the AND operation for canceling the processing content of the current processing to restore the processing content of the previous processing The contents of the storage means and the contents of the storage means in response to an external command instructing one of the drawing creating process and the editing process, the undo operation and the redo operation for restoring the process content of the process canceled by the undo operation. It is provided with means for executing the creation processing and the editing processing of the drawing based on the content of the storage means, the content of the storage means and the content of the holding means.

[0026]

[Operation] At the time of creating / editing from the undo state (redo state), the redo state is saved without erasing, and the new state is branched and saved. If this is done, it becomes possible to select which state to transition to when the branch is reached.

When a command is input, the contents of the command and the attributes and other information associated with the command are treated as one history data, and the history data is created each time the command is executed.

When these history data are stored in the history storage unit, they have a list structure, and the address of the history data next to a certain history data or the history data of the previous history data is provided inside the history data.

Further, an address for branching (branch data address) is provided in the history data together with the above data. The branch data indicated by this branch data address has the address of the history data of the branch destination, the branch ID number assigned each time the branch is performed, and the next branch for handling the branch data as a list structure when there are multiple branches. It has a branch data address.

When an instruction is executed, an area for history data is secured, and the contents and attributes of the instruction are written in the history data.
The address of the history data is designated as the history pointer indicating the address of the current history data.

The AND process is a process for erasing the contents of the history data indicated by the history pointer, but in the case of branched history data, the contents of the history data are executed. then,
The history pointer designates the address of the corresponding history data, and the address of the data to be undone and the flag indicating whether or not it is branched data are saved in the AND stack.

If the history data indicated by the history pointer has a branch data address, when the AND instruction is input, the previous history data address, the next history data address,
Alternatively, the branch data addresses are traced and displayed in a list, and the operator is prompted to select and input.

In this case, the display order is the history data indicated by the previous history data address, the history data indicated by the next history data address, and the history data indicated by the branch data addresses arranged in ascending order of branch ID numbers.

In the redou process, the address of the AND stack is restored, the flag is used to judge whether the data is branch data, and the contents of the history data are canceled or executed. The address is designated as the history pointer, and when the instruction is executed when the next history data address included in the history data indicated by the history pointer is not NULL, the address of the reserved branch data area is inserted into the branch data address of the history data. .

After that, a history data area is secured and its address is put in the history data address of the branch data.
The history data area indicated by the history data address is written with data such as the contents and attributes of the instruction, and the address is set as the history pointer.

With this, even if the creating / editing process is performed after the undo process, the portion containing the information of the redo operation and the other region can be branched and secured, so that after all the operations. It is possible to reproduce the state of. Therefore, when the creating / editing process is mistakenly performed after the undo operation, the state before the undo operation can be restored, or the canceled and rewritten portion can be restored.

[0037]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, C according to one embodiment of the present invention
The AD system includes an input device 1, a CAD processing device 2, and a display device 3.

The input device 1 is a device such as a keyboard and a mouse (not shown) for inputting a drawing command. The display device 3 receives a command input from the input device 1 from the CAD processing device 2
Display the results interpreted and processed by.

The CAD processing device 2 includes an input control section 4, a creation / edit processing section 5, a display control section 6, a history control section 7,
It comprises a history storage unit 8. CAD processor 2
In, the contents input from the input device 1 are analyzed by the input control unit 4, and the creation / editing processing unit 5 executes the instructions analyzed by the input control unit 4. Data such as commands and coordinates analyzed by the input control unit 4 is sent to the history control unit 7 and stored in the history storage unit 8 under the control of the history control unit 7.

Also, an UNDO instruction for canceling the operation executed from the input device 1 and restoring the data before the execution of the operation, and a REDO instruction for restoring the data before executing the AND instruction are input. Then, the input control unit 4 sends the AND instruction and the REDO instruction to the history control unit 7.

At this time, the creation / editing processing unit 5 executes or cancels the history based on the information stored in the history storage unit 8. The result processed by the creation / editing processing unit 5 is displayed on the display device 3 under the control of the display control unit 6.

FIG. 2 is a diagram showing the structure of data stored in the history storage unit 8 of FIG. 2A is a diagram showing a structure of history data 11 stored in the history storage unit 8 of FIG. 1, and FIG. 2B is a structure of branch data 12 stored in the history storage unit 8 of FIG. FIG. 2C is a diagram showing the structure of the data value 13 stored in the history storage unit 8 of FIG. 1.

In FIG. 2A, the history data 11 is a command name 11a indicating the contents of an instruction, a data value address 11b indicating the storage position of the data value 13, an attribute 11c related to the instruction, and the previous history data. Of the previous history data address 11d indicating the storage position of the branch data, the branch data address 11e indicating the storage position of the branch data, and the next history data address 11f indicating the storage position of the history data to be performed next.

In FIG. 2B, the branch data 12 indicates a branch ID number 12a indicating the order of branching, a history data address 12b indicating history data of a branch destination, and a storage position of the next branch data. Next branch data address 12
c.

In FIG. 2C, the data value 13 is the data 13a showing the contents of the drawing element processed by the creation / editing processing section 5 and the next data showing the storage position of the next data continuous to this data 13a. And the value address 13b.

FIG. 3 is a flow chart showing the processing operation of the history control unit 7 of FIG. 1 when executing an instruction, and FIG. 4 is a flow chart showing the processing operation of the history control unit 7 of FIG. 1 when executing an AND instruction. FIG. 5 is a flow chart showing the processing operation of the history control unit 7 of FIG. 1 when the REDO instruction is executed. The processing operation of the history control unit 7 will be described with reference to FIGS.

When the creating / editing processing section 5 carries out the creating / editing processing, the history control section 7 first clears the contents of the AND stack (not shown) (step S1 in FIG. 3). That is, the history control unit 7 clears the contents of the ANDO stack by writing "NULL" into the contents of the start address of the ANDO stack.

Next, the history control unit 7 checks in the history storage unit 8 whether or not the history data 11 indicated by the current history pointer has the next history data address 11f (FIG. 3).
Step S2).

The history control unit 7 uses the next history data address 11
If f is a "NULL" code, that is, if there is no next history data, a new area for history data 11 is secured in the history storage unit 8 (step S3 in FIG. 3). History control unit 7
Acquires the address of the new area at the same time that the new area is secured, the address is set to the next history data address 11
f.

On the other hand, the fact that the history data 11 has the next history data address 11f means that another area needs to be secured, that is, the history data 11 needs to be branched to create the history control unit 7. Is the history storage unit 8
In, a new area for the branch data 12 is secured (step S4 in FIG. 3), and the address of the secured area is put into the branch data address 11e of the history data 11 indicated by the current history pointer.

After that, the history control unit 7 secures a new area of the history data 11 under the area of the branch data 12 secured in the history storage unit 8 (step S5 in FIG. 3), and branches the address of the secured area. It is put in the history data address 12b of the data 12.

The history control unit 7 designates the address of the history data 11 secured in steps S3 and S5 as a history pointer (step S6 in FIG. 3). The history control unit 7 writes the command name 11a and the attribute 11c of the instruction in the area of the history data 11 indicated by the history pointer (step S in FIG. 3).
7).

At the same time, the history control unit 7 secures an area for the data value 13 in the history storage unit 8 and stores the data 1 such as coordinates.
3a is stored, the address of the data value 13 is stored in the data value address 11b of the history data 11 indicated by the history pointer, and the address of the previous history data separately stored in advance is stored in front of the history data 11 indicated by the history pointer. Write to the history data address 11d, respectively. In this case, the history control unit 7 writes the "NULL" code in the branch data address 11e and the next history data address 11f of the history data 11 indicated by the history pointer.

After writing the history data 11, the history control unit 7
Causes the creation / editing processing unit 5 to execute the creation / editing process (step S8 in FIG. 3).

When an AND processing command is given from the input device 1 through the input control unit 4, the history control unit 7 first determines whether or not the branch data address 11e of the history data 11 indicated by the history pointer is a "NULL" code. Check (step S11 in FIG. 4). This process is a process of checking whether or not the history data 11 is branched.

The branch data address 11e is "NUL.
If it is the L ”code, the history control unit 7 checks whether the latest flag of the ANDO stack is“ 1 ”(FIG. 4).
Step S12). This process is a process of checking whether the AND process performed immediately before is a process in which the drawing is restored by executing the command.

The latest flag of Ando stack is "0".
Alternatively, if it is a "NULL" code, since it is an AND process that normally cancels an instruction, the history control unit 7 writes the address indicated by the history pointer in the AND stack and writes "0" in the flag (step S13 in FIG. 4). ). After that, the history control unit 7 causes the creation / editing processing unit 5 to perform a process of canceling the contents of the history data indicated by the history pointer (step S14 in FIG. 4).

The history control unit 7 designates the address of the previous history data address 11d of the canceled history data 11 in the history pointer (step S15 in FIG. 4). That is, the history control unit 7 causes the history data immediately before the canceled history data 11 to be indicated by the history pointer.

On the other hand, in step S11, the branch data address 11e of the history data 11 indicated by the history pointer is "NU".
If it is determined that the LL "code is not set, the history control unit 7 moves the history data indicated by the history pointer in the direction of the previous history data or the direction of the next history data, or in the direction of the branch data, respectively. It traces until there is no branch data and displays a list of them (step S16 in FIG. 4).

That is, the history control unit 7 determines that the history data address or the next history data address or the branch data address is "NUL" from the history data indicated by the history pointer.
It traces until it becomes L "code, and displays the list.

When the operator selects and inputs a branch destination based on the displayed contents (step S17 in FIG. 4), the history control unit 7 determines whether the selection input from the operator is the previous history data address 11d. Examine (Figure 4
Step S18).

If the operator's selection input selects the previous history data address 11d, the history control unit 7 determines that it is an AND processing which normally cancels an instruction, and in step S13, a history pointer is displayed on the AND stack. The address indicated by is written, and "0" is written in the flag.

If the operator's selection input does not select the previous history data address 11d, the history control unit 7 has executed the contents of the history data indicated by the history pointer and also cancels it. Since there is no,
It is determined that the history data indicated by the history data address of the next history data or the branch data is restored by the AND processing, and the address of the history data to be restored is designated in the history pointer (step S19 in FIG. 4).

The history control unit 7 writes the address indicated by the history pointer in the AND stack and writes "1" in the flag to indicate that the AND processing is realized by executing the instruction (step S20 in FIG. 4). After that, the history control unit 7 causes the creation / editing processing unit 5 to execute the creation / editing process (step S21 in FIG. 4).

Here, the redo process is a process that can be performed after the undo process is performed and before the creation / editing process is performed. That is, the redou process is a process of canceling the undo process.

Therefore, the input device 1 is operated through the input control unit 4.
When a command for redou processing is given from, the history control unit 7 first reads the address and flag written in the ANDO stack (step S31 in FIG. 5), and specifies the address in the history pointer (step S32 in FIG. 5). .

Next, the history control unit 7 determines whether or not the read flag is "1" (step S33 in FIG. 5). If the flag is "1", the history data indicated by the history pointer is deleted. The creation / editing processing unit 5 is caused to perform (step S34 in FIG. 5), and if the flag is not “1”, the creation / editing processing unit 5 is caused to execute the instruction (step S3 in FIG. 5).
4).

FIG. 6 (a) shows an embodiment of the present invention in which three instructions are used.
It is a figure which shows the content of the historical data when it went to FIG.
6B is a diagram showing display contents when the history data of FIG. 6A is stored. FIG. 7A is a diagram showing the contents of history data when the AND process is performed in the state shown in FIG. 6, and FIG. 7B is a display when the history data of FIG. 7A is stored. It is a figure which shows the content.

FIG. 8A is a diagram showing the contents of history data when an instruction is issued in the state shown in FIG. 7, and FIG. 8B is when the history data of FIG. 8A is stored. It is a figure which shows the display content of. FIG. 9A is a diagram showing the contents of history data when the state of the drawing is returned to FIG. 6 in the state shown in FIG.
FIG. 9B is a diagram showing display contents when the history data of FIG. 9A is stored.

FIG. 10A is a diagram showing the contents of history data when the state of the drawing is returned to the first instruction in the state shown in FIG. 9, and FIG. 10B is the history of FIG. 10A. It is a figure which shows the display content when data are memorize | stored. FIG. 11 (a)
11B is a diagram showing the contents of history data when a new instruction is performed after performing an AND processing once in a state of branching once, and FIG. 11B stores the history data of FIG. 11A. It is a figure which shows the display content at the time of being.

A process for creating an electrical design drawing according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 6 shows a state in which the instruction is executed three times. As shown in FIG. 6B, after the FF symbol 61 is arranged at the coordinates (PX, PY), the signal line 62 is arranged at the coordinates (QX).
1 and QY1) and the coordinates (QX2, QY2) are wired, and the FF symbol 63 is arranged at the coordinates (RX, RY).

In this case, the history storage unit 8 is stored in FIG.
The history data as shown in is stored. That is, the history 21 is composed of history data 31 to 33. Here, the history pointer 23 is a pointer indicating the address HAD3 of the current history data 33 that has been executed last since the execution or cancellation processing of the instruction was performed.

In the history data 31 of the history data address HAD1, the command name "SYMBOL" indicating the instruction content when the FF symbol 61 is arranged at the coordinates (PX, PY).
And a data value address DAD indicating the storage position of the data value
1, the attribute “FF” related to the command, and the previous history data address “NULL” indicating the storage location of the previous history data.
A branch data address “NULL” indicating the storage position of the branch data and a next history data address HAD2 indicating the storage position of the history data to be performed next are stored.

In the history data 32 of the history data address HAD2, the command name "SIGNAL" indicating the content of the command when the signal line 62 is wired between the coordinates (QX1, QY1) and the coordinates (QX2, QY2), and the data A data value address DAD3 indicating a storage position of a value, an attribute “SINGLE” related to an instruction, a previous history data address HAD1 indicating a storage position of previous history data, and a branch data address “NULL” indicating a storage position of branch data. , And the next history data address HAD3 indicating the storage position of the history data to be performed next is stored.

In the history data 33 of the history data address HAD3, the command name "SYMBOL" indicating the content of the instruction when the FF symbol 63 is arranged at the coordinates (RX, RY).
And a data value address DAD indicating the storage position of the data value
7, an attribute “FF” related to the command, a previous history data address HAD2 indicating the storage position of the immediately previous history data,
Branch data address “NU indicating the storage location of branch data
LL ”and the next history data address“ NULL ”indicating the storage position of the history data to be performed next are stored.

The ANDO stack 22 is a stack for storing the address of the history data corresponding to the AND processing and a flag indicating whether to execute or cancel the contents of the history data at the time of redo. In the state shown in FIG. 6A, since the AND processing is not performed, the AND stack 22 contains a "NULL" code indicating that it is empty.

The data value sequence 24 is composed of data values 41 to 48. Data value of data value address DAD1 4
1 stores a coordinate PX at which the FF symbol 61 is arranged and a next data value address DAD2 indicating a storage position of the next data, and a coordinate PY at which the FF symbol 61 is arranged at the data value 42 of the data value address DAD2. , The next data value address “NULL” indicating the storage position of the next data is stored.

Data value of the data value address DAD3 43
The starting point coordinate QX1 for wiring the signal line 62 and the next data value address DAD4 indicating the storage position of the next data are stored in the data value 44 of the data value address DAD4. And the next data value address DAD5 indicating the storage position of the next data are stored.

Data value of data value DAD5 45
Stores the end point coordinate QX2 for wiring the signal line 62 and the next data value address DAD6 indicating the storage position of the next data. The end point coordinate for wiring the signal line 62 at the data value 46 of the data value address DAD26. QY2 and the next data value address "NULL" indicating the storage position of the next data are stored.

Data value of the data value address DAD7 47
The coordinate RX for arranging the FF symbol 63 and the next data value address DAD8 indicating the storage position of the next data are stored, and the coordinate RY for arranging the FF symbol 63 at the data value 48 of the data value address DAD8. The next data value address “NULL” indicating the storage position of the next data is stored.

When the command is executed, the history control unit 7 secures the area of the history data 31 to 33 in the history 21 of the history storage unit 8 and writes the command and the attribute therein. At this time, the history control unit 7 stores the history data 31 to 33 in a list structure that associates each data with each other.

Next, the history control unit 7 secures areas for the data values 41 to 48 in the data value sequence 24 of the history storage unit 8 and writes the data such as coordinates therein. Here, the data values 41 to 4
Since the number of areas of 8 differs depending on the instruction, the history control unit 7 changes the number of areas of the data values 41 to 48 for each instruction and stores the list structure.

In the case of history 21 as shown in FIG. 6A,
Since the command for arranging the symbols is given first, the history control unit 7 sets the history data 3 to the address HAD1 of the history 21.
The area 1 is reserved, and the command name “SYMBOL” indicating that it is a symbol arrangement instruction and the attribute “FF” indicating that the arranged symbol is a flip-flop are written in the reserved area.

Subsequently, the history control unit 7 secures the areas of the data values 41 and 42 in the addresses DAD1 and DAD2 of the data value sequence 24, and the X coordinate value "PX" and Y indicating the arrangement position of the symbol in the secured area. Write the coordinate value "PY".

In this case, the history control unit 7 uses the address DAD
Address DAD as the next data value address in area 1
2 is entered and there is no next area in the data value 42, so "NUL" is set as the next data value address in the area of the address DAD2.
Insert "L".

The history control unit 7 makes a command every time an instruction is issued.
The content of the instruction is stored in the history storage unit 8 in the above-described form.

In the previous history data address of history data, the address of the history data in which the content of the previous command is stored is entered. In the case of the history 21 shown in FIG. 6A, since the history data 31 of the address HAD1 is the history of the instruction executed first, "NULL" is entered in the previous history data address.

Further, the history data 32 of the address HAD2
The address HAD1 of the previous history data 31 and the history data 3 of the address HAD3 are the previous history data addresses of
The previous history data address of 3 has the previous history data 32.
Addresses HAD2 of each are entered.

In the case of the history record 21 shown in FIG. 6A, since the branch data addresses of the history record data 31 to 33 are not branched, "NULL" is entered in each of them.

The address of the next history data is stored in the next history data address of the history data unless the history data of the branch data indicated by the branch data address is used. In the case of the history 21 shown in FIG. 6A, the address HAD
The history data 31 of 1 has the following history data address HAD2.
However, the history data 32 of the address HAD2 contains the next history data address HAD3, respectively. Address HAD
Since the history data 33 of No. 3 is the history data of the last executed instruction, "NULL" is included.

FIG. 7 shows a state in which an AND instruction has been performed once from the state shown in FIG. 6, and as shown in FIG. 7B, the state shown in FIG. 6B is changed to coordinates (RX, RY). It shows a state in which the arranged FF symbols 63 are removed.

In this case, when the AND instruction is given in the state shown in FIG. 6A, the address HAD3 indicated by the history pointer 23 is written to the AND stack 22, and at the same time, the flag of the AND stack 22 is set at the time of the REDO. "0" is written to indicate that the contents of the history data are data to be executed.

In this case, the creation / edit processing unit 5 determines that the contents of the history data 33 are the coordinates (RX, RY) of the FF symbol 63.
Since it is an instruction to be placed at, the instruction to delete the FF symbol 63 placed at the coordinates (RX, RY) is performed. After that,
The previous history data address HAD2 of the history data 33 is designated in the history pointer 23.

FIG. 8 shows a state in which a symbol arrangement instruction is issued from the state shown in FIG. 7, and as shown in FIG.
AND the coordinates (SX, SY) from the state shown in FIG.
The state where the symbols 64 are arranged is shown.

In the state shown in FIG. 7A, when a symbol arrangement command is given, the history control unit 7 clears the AND stack 22, and the history storage unit 8 stores the address N of the history 21.
The area of the branch data 34 is secured in AD1, and NAD1 is stored in the branch data address of the history data 32 of the address HAD2 indicated by the history pointer 23.

Subsequently, the history control unit 7 secures the area of the history data 35 in the address HAD4 of the history 21 of the history storage unit 8 and writes the content of the instruction to place the AND symbol 64. After that, the history control unit 7 determines the branch data address NAD.
The address HAD4 of the history data 35 is stored in the history data address of the branch data 34 of 1, and the address HAD4 of the history data 35 is designated in the history pointer 23.

That is, the history control unit 7 secures the area of the branch data 34 at the address NAD1 of the history 21, and the branch ID number "1" indicating the order of branching in the secured area.
And the address HAD4 of the corresponding history data 35 are written. In this case, since there is no branch data next to the branch data 34, "NULL" is written in the next branch data address.

Further, the history control unit 7 secures the area of the history data 35 at the address HAD4 of the history 21, and the command name "SYMBOL" indicating that it is an instruction of symbol placement in the secured area and the symbol to be placed is AND. Write the attribute "AND" indicating that it is a gate.

Further, the history control unit 7 secures the areas of the data values 49 and 50 in the addresses DAD9 and DAD10 of the data value sequence 24, and the X coordinate value "SX" and the Y coordinate indicating the arrangement position of the symbol in the secured area. Write the value "SY".

At this time, the history control unit 7 sets the address DAD
Address DAD as the next data value address in area 9
10 is entered and there is no next area in the data value 50, the area of the address DAD10 is set to "N" as the next data value address.
Insert "ULL".

On the other hand, the previous history data address of the history data 35 contains the address HAD2 of the history data 32 in which the content of the instruction executed immediately before is stored. Since the branch data address of the history data 35 is not branched, "NULL" is entered, and the next history data address of the history data 35 is the history data of the last executed instruction, so "NULL" is entered. There is.

FIG. 9 shows a state in which an AND instruction is performed twice from the state shown in FIG. 8. As shown in FIG. 9B, the state shown in FIG. 8B is changed to coordinates (SX, SY). It shows a state in which the arranged AND symbols 64 are removed and the FF symbols 63 are arranged at the coordinates (RX, RY). However,
The second ANDO instruction is an AND instruction to the branched history data.

When an AND instruction is given in the state shown in FIG. 8A, the history control unit 7 performs processing to delete the contents of the history data 35 at the address HAD4 indicated by the history pointer 23, and the AND stack 22 receives the address HAD4. And the flag of the AND stack 22 is written with "0" indicating that the history data is the data to be executed at the time of redo. Further, the history control unit 7 causes the history pointer 23 to display the previous history data address HAD2 of the history data 35.
Is specified.

When an AND instruction is further given in this state, the history control unit 7 sets NA to the branch data address of the history data 32 of the address HAD2 indicated by the history pointer 23.
Since D1 is included, the operator is urged to select the history data to be restored through the display device 3.

In this case, the operator may select and input the history data 32 of the address HAD2 and return to the history data 31 of the previous history data address HAD1 and the direction of the history data 33 of the next history data address HAD3. To be

In FIG. 9, the state of the drawing shown in FIG. 6B can be reproduced as shown in FIG. 9B by executing the following history data, that is, the contents of the history data 33 at the address HAD3. .

At this time, the history control unit 7 uses the history pointer 2
Specify address HAD3 in 3 and
In addition to writing the address HAD3 to, the flag of the ANDO stack 22 is written with "1" indicating that the contents of the history data are deleted at the time of redo.

In FIG. 10, the REDO instruction is performed once from the state of FIG. 9, the AND instruction is further performed to select the previous history data, or the AND instruction is performed twice from the state of FIG. The state in which the previous history data is selected in the processing is shown.

That is, as shown in FIG. 10B, the FF symbol 63 and the coordinates (QX1, QY1) and the coordinates (QX2, QY2) arranged at the coordinates (RX, RY) from the state shown in FIG. 9B. And the AND symbol 64 and the coordinates (QX1, QY1) and the coordinates (QX2, QY2) arranged at the coordinates (SX, SY) from the state shown in FIG. It shows a state in which the signal line 62 wired between and is removed.

That is, the state in which only the contents of the history data 31 at the address HAD1 in FIG. 9A are executed is reproduced. Further, FIG. 10 shows a state in which a redou command is performed once from the state of FIG. 9 and then an AND command is performed to select the previous history data.

In this case, the address HAD4 and the address HAD2 are written in the AND stack 22 and "0" indicating that the contents of the history data are to be executed at the time of redo are written in the corresponding flags, so that the redo instruction is executed twice. When executed, the state of FIG. 8 can be reproduced.

FIG. 11 shows a state in which an AND instruction has been executed once in the state of branching once, and then a new instruction has been executed. As shown in FIG. 11B, the FF symbol 61 has coordinates (PX). , PY) and then the coordinates (QX1, QY1
) And the coordinates (QX2, QY2), the signal line 62 is wired, and the NAND symbol 65 is arranged at the coordinates (TX, TY).

That is, it shows a state in which the creation / editing process has been performed when the history pointer 23 indicates the history data 32 of the address HAD2 in the state of branching once. In this case, the ANDO stack 22 is cleared by executing the creating / editing process.

Address HAD2 in the state of branching once
The branch data address of the history data 32 of is "NULL"
Instead, the address NAD1 is indicated, and the next branch data address of the branch data 34 indicates "NULL".

In this state, when a symbol arrangement command is given, the history control unit 7 clears the AND stack 22, secures an area for the branch data 36 at the address NAD2 of the history 21 of the history storage unit 8, and stores the history pointer. NAD2 is stored in the next branch data address of the branch data 34 of the address NAD1 indicated by 23.

Subsequently, the history control unit 7 secures the area of the history data 37 at the address HAD5 of the history 21 of the history storage unit 8 and writes the content of the instruction to arrange the NAND symbol 65. After that, the history control unit 7 determines the branch data address NA
The address HAD5 of the history data 37 is stored in the history data address of the branch data 36 of D2, and the history pointer 23
The address HAD5 of the history data 37 is designated at.

That is, the history control unit 7 secures the area of the branch data 36 at the address NAD2 of the history 21, and the branch ID number "2" indicating the order of branching in the secured area.
And the address HAD5 of the corresponding history data 37 are written. In this case, since there is no branch data next to the branch data 36, "NULL" is written in the next branch data address.

Further, the history control unit 7 secures the area of the history data 37 at the address HAD5 of the history 21, and the command name "SYMBOL" indicating that it is a symbol placement instruction in the secured area and the symbols to be placed are NAND gates. Write the attribute "NAND" indicating that.

Further, the history control unit 7 assigns the data values 51, 52 to the addresses DAD11, DAD12 of the data value sequence 24.
Area is secured, and the X coordinate value “TX” and the Y coordinate value “TY” indicating the arrangement position of the symbol are written in the secured area.

At this time, the history control unit 7 sets the address DAD
Address DA as the next data value address in area 11
D12 is entered and since there is no next area in the data value 52, "NULL" is entered as the next data value address in the area of the address DAD12.

On the other hand, the previous history data address of the history data 37 contains the address HAD2 of the history data 32 in which the content of the instruction executed immediately before is stored. Since the branch data address of the history data 37 is not branched, "NULL" is entered, and the next history data address of the history data 37 is the history data of the last executed instruction, so "NULL" is entered. There is.

FIG. 12 (a) is a diagram showing a state in which an undo and redo operation are possible in one embodiment of the present invention.
FIG. 12B and FIG. 12C are diagrams showing a state in which undo and redo can be performed in the conventional example.

In these figures, the state indicates the state in which the operation is performed first, the state indicates the state in which the operation is performed, the state indicates the state in which the operation is performed, and the state cancels the state. It shows a state in which an operation is performed later from the state.

In the conventional example, as shown in FIG.
It is possible to undo and redo from the state where the last operation was performed to the state and the state. However, if an operation is performed to change from state to state after canceling the state, ANDO and REDO from state to state are possible,
Restoring the state is impossible because the state information is lost.

On the other hand, according to the embodiment of the present invention, even when the operation for changing from state to state is performed after canceling the state, the state information is branched as shown in FIG. 12 (a). It is possible to restore any state among the state, the state, and the state, since the state is saved.

As described above, in the CAD processing apparatus 2 which performs drawing creation processing and editing processing, every time the drawing creation processing and editing processing is performed, the data value 13 indicating the processing content is shown.
And every time the drawing process and the editing process are performed, the data value address 11b of the current process, the previous history data address 11d and the subsequent history data address 11f, which are successively performed before and after the current process, and after the subsequent history data. History data 11 in which a branch data address 11e indicating the storage position of the history information of the change process for the current process performed continuously is associated;
The branch data 12 and the ANDO stack 22 that holds the history data address of the canceled processing at the time of the AND operation that cancels the processing content of the current processing and restores the processing content of the preceding processing are stored in the history storage unit 8 and the history storage is performed. A state in which the drawing / editing process is canceled and rewritten by causing the creating / editing processing unit 5 to execute a normal creation / editing command, an AND command, or a REDO command based on the contents of the unit 8 under the control of the history control unit 7. However, it is possible to restore to an arbitrary state such as the state before the cancellation of the drawing / editing process.

With this, even if the creating / editing process is performed after the undo process, the portion containing the information of the redo operation and the other region can be branched and secured, so that after all the operations. It is possible to reproduce the state of. In other words, if the creation / editing process is mistakenly performed after the undo operation, the state before the undo operation can be restored, or the canceled and rewritten portion can be restored.

[0130]

As described above, according to the present invention, in a drawing creation / editing apparatus for performing drawing creation processing and editing processing, the processing contents are stored every time the drawing creation processing and editing processing are performed, Each time the creation process and the editing process of the current process are performed, the storage position of the process content of the current process and the accumulated position of the history information of the previous process and the next process performed before and after the current process and after the next process are performed. The history information of the change process is stored while the history information of the change process is stored by associating with the accumulation position of the history information of the change process with respect to the current process performed continuously.
Cancels the processing contents of the current processing and restores the processing contents of the previous processing. When the AND operation is performed, the storage position of the history information of the canceled processing is held and the drawing creation processing and editing processing and the AND operation are performed based on these contents. Also, even if the drawing / editing process is canceled and rewritten by executing the creating process and the editing process according to the external command instructing either the redo operation to restore the processing contents of the process canceled by the AND operation. There is an effect that the state can be restored to an arbitrary state such as the state before the cancellation of the drawing / editing process.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

2A is a diagram showing a structure of history data stored in a history storage unit of FIG. 1, FIG. 2B is a diagram showing a structure of branch data stored in a history storage unit of FIG. 1, FIG. 3] is a diagram showing a structure of a data value stored in the history storage unit of FIG. 1.

FIG. 3 is a flowchart showing a processing operation at the time of executing an instruction of the history control unit of FIG.

FIG. 4 is a flowchart showing a processing operation of the history control unit of FIG. 1 when an AND instruction is executed.

5 is a flowchart showing a processing operation of the history control unit of FIG. 1 when a REDO instruction is executed.

FIG. 6A is a diagram showing the contents of history data when an instruction is given three times in one embodiment of the present invention, and FIG. 6B shows the display contents when the history data of FIG. FIG.

7A is a diagram showing the contents of history data when the AND processing is performed in the state shown in FIG. 6, and FIG. 7B is a diagram showing the display contents when the history data of FIG. Is.

8A is a diagram showing the content of history data when an instruction is issued in the state shown in FIG. 7, and FIG. 8B is a diagram showing the display content when the history data of FIG. 7A is stored. is there.

9A is a diagram showing the contents of history data when the state of the drawing is returned to FIG. 6 in the state shown in FIG. 8, and FIG. 9B is a diagram showing FIG.
FIG. 7 is a diagram showing display contents when history data of is stored.

10A is a diagram showing the contents of history data when the state of the drawing is returned to the first instruction in the state shown in FIG. 9;
(B) is a figure which shows the display content when the historical data of (a) is memorize | stored.

11A is a diagram showing the contents of history data when a new instruction is performed after performing an AND processing once in a state of branching once, and FIG. 11B shows the history data of FIG. It is a figure which shows the display content at the time of being memorize | stored.

FIG. 12 (a) is a diagram showing a condition in which an undo and redo can be performed in an embodiment of the present invention, and FIGS. 12 (b) and (c) are diagrams showing a condition in which an undo and redo can be performed in a conventional example.

FIG. 13 is a diagram showing a configuration of a conventional element database.

FIG. 14 is a diagram showing a state in which an AND operation is performed once after performing an operation twice in the conventional example.

[Explanation of symbols]

 1 Input Device 2 CAD Processing Device 4 Input Control Unit 5 Creation / Editing Processing Unit 6 Display Control Unit 7 History Control Unit 8 History Storage Unit 11 History Data 11a Command Name 11b Data Value Address 11c Attribute 11d Previous History Data Address 11e Branch Address Address 11f Next history data address 12 Branch data 12a Branch ID number 12b History data address 12c Next branch data address 13a Data 13b Next data value address

Claims (4)

[Claims] 1. A drawing creation / editing apparatus for performing drawing creation processing and editing processing, comprising: storing means for storing the processing contents each time the drawing creation processing and editing processing is performed; Each time an editing process is performed, the storage position of the processing content of the current process in the storage means and the storage position of the history information of the previous process and the next process performed before and after the current process and the next process are performed. Accumulation means for accumulating as history data by associating the accumulation position of the history information of the change processing with respect to the current processing continuously performed afterwards, storage means for storing the history information of the change processing, and the current processing. Holding means for holding the storage position of the history information of the canceled processing at the time of the AND operation for canceling the processing content of the above and restoring the processing content of the previous processing, and the creation processing and editing processing of the drawing and the AND operation. The contents of the storing means, the contents of the accumulating means, and the contents of the storing means in response to an external command instructing any one of the operation and the redou operation for restoring the processing content of the processing canceled by the AND operation. A drawing creation / editing apparatus comprising: means for executing the drawing creation processing and the editing processing based on the contents of the holding means. 2. The drawing creation / editing apparatus according to claim 1, wherein the storage unit is configured to store the processing content and a storage position of processing content subsequent to the processing content in association with each other. 3. The drawing creation / editing apparatus according to claim 1, wherein the storage means and the storage means have a list structure in which respective data are associated with each other. 4. The storage means stores history information of the change processing, identification information indicating a processing order of the change processing, and storage locations of history information of change processing subsequent to the change processing in association with each other. The drawing creation / editing apparatus according to any one of claims 1 to 3, wherein the drawing creation / editing apparatus is configured as described above.