JP2606543B2 - Graph structure diagram data display management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graph structure diagram data display management device for displaying and editing graphic data having a graph structure composed of nodes and arcs. The present invention relates to a graph structure diagram data display management device that can be displayed by a simple operation.

[0002]

2. Description of the Related Art Graphic data having a graph structure composed of nodes and arcs is widely used in CAD and the like.

A conventional graph structure diagram data display management device for displaying and editing graphic data of a graph structure has a function of displaying all nodes and arcs inputted by a mouse or the like at the same time on a screen. (For example, NEC U).
X Software Ding User's Guide WKW01-2 P4
7-P55 June 1992 2nd edition Issued by NEC Corporation). By providing such a function, it is possible to display only a necessary part of a complicated drawing.

[0004] For example, a graph structure composed of a square node Na, elliptical nodes Nb to Nd, arcs A to C of solid arrows indicating data flow and arcs D of dashed arrows indicating control flow as shown in FIG. In the figure, when it is necessary to display only the portion related to the control flow, the nodes Na and Nc and the arcs A to C are designated by using a mouse or the like, and these are hidden. , Only the part related to the control flow can be displayed. If it is necessary to display only the part related to the data flow, display all the components, specify the arc D using a mouse or the like, and hide the data to display the data. Only the part related to the flow can be displayed.

[0005]

As described above, conventionally, when it is necessary to display only a part of the drawing, an operator uses a mouse or the like to identify unnecessary nodes and arcs each time. And hide them, there was a problem to be solved in operability.

An object of the present invention is to provide a graph structure diagram data display management device capable of displaying only a necessary portion of a graph structure diagram by a simple operation.

[0007]

According to the present invention, in order to achieve the above object, a component data memory in which the shape and position of each component of a graph structure diagram are registered is provided.
The shape and the position of the component
And corresponding to the component whose deletion was instructed
Delete shape and position from the component data memory
The component management unit and the identification of the components belonging to the group
Manages the set of components belonging to the group, including the offspring
Group element in which group data for management is registered
And data memory, is registered in the group element data memory
For each group data that has been deleted,
Check if it contains the identifier of the indicated component,
The deletion instruction is issued for the group data that contains
A group management unit for deleting the identifier of the configuration elements, the
Group data registered in the group element data memory
A group combining unit that performs a set operation on a set of components belonging to the selected group from among the set of components managed by the data, and uses the component indicated by the set operation result as a display target component; And a display management means for displaying, on the display device, only the constituent elements which are set as display target constituent elements by the group synthesizing means.

[0008]

In the component data memory, each of the graph structure diagrams is stored.
The shape and position of the component are registered. Group required
The elementary data memory shows the constituent elements belonging to the group
A set of components that includes an identifier and belongs to the group
Group data for management is registered.

When only a part of the graph structure is to be displayed, the operator selects a group.

When a group is selected by the operator, the group synthesizing means performs an operation on a set of constituent elements belonging to the selected group, and sets the constituent element indicated by the set operation result as a display target constituent element.

[0011] The display management means causes the display device to display only the constituent elements which are set as display target constituent elements by the group synthesizing means. Also, some components are deleted from the graph structure diagram.
If you want to remove, the operator indicates the component to remove
Enter the deletion instruction. Thus, the component management unit
Constructs the corresponding shape and position of the component whose deletion has been instructed
Deleted from element data memory and group management
Group data registered in the group element data memory
The identifier of the component that was instructed to be deleted for each
Check whether it is included or not, and
On the other hand, the identifier of the component designated to be deleted is deleted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. An input / output unit 1, an operation analysis unit 2, a component management unit 3, a group management unit 4, a group synthesis unit 5, a graph structure It comprises an input / output unit 6, a display management unit 7, a file device 8, a mouse 9, a keyboard 10, and a CRT 11.

The input / output unit 1 is an interface with an operator.

The operation analysis unit 2 analyzes an operation instruction given by the operator via the input / output unit 1 and analyzes each of the units 5 to 7,
It has a function of giving operation instructions to 31 and 41 and a function of giving data input together with each operation instruction to the corresponding part.

The component management means 3 includes a component management unit 31
, A component data memory 32, and a selection list 33.

In the component data memory 32, component data for each component constituting the graph structure diagram is registered. When the graph structure diagram is as shown in FIG. 15, a total of 8 for nodes Na to Nd and arcs A to D
The component data are registered in the component data memory 32.

FIGS. 2A and 2B are diagrams showing the component data for the nodes Na and Nb in the graph structure diagram shown in FIG. Note that the nodes Na to Nd have identifiers 1 to
4 and arcs A to D are given identifiers 5 to 8, respectively.

The component data of the node Na is shown in FIG.
As shown in FIG. 5, type information indicating a node, an identifier “1” given by the component management unit 31,
The label “Na” given by the operator, the shape information indicating that it is a square, and the coordinate values (10, 1)
0), (30, 20), an identifier “none” of an input arc (an arc having the node as an end node), and an identifier “of an output arc A (an arc having the node as a start node)” 5 "and the node Na is CR
And a display state instructing display at T11.

As shown in FIG. 2B, the component data of the node Nb is provided by type information indicating a node, an identifier "2" given by the component management unit 31, and an operator. Label "N"
b ”, shape information indicating an ellipse, and coordinate values (5
(0, 10), (70, 20), the identifier “5” of the input arc A, and the output arcs B, D
Identifiers “6” and “8” and a display state instructing to display the node Nb on the CRT 11.

FIG. 3 is a diagram showing constituent element data for arc A in the graph structure diagram shown in FIG.
As shown in the figure, the component data of the arc A is type information indicating that the component is an arc, an identifier “5” given by the component managing unit 31, a label “A” given by the operator, Shape information indicating that the end point is a solid line with an arrow, and the start point and end point are (30, 1)
5), a coordinate string indicating (50, 15), an identifier “1” of the start node Na, an identifier “2” of the end node Nb, and a display state instructing to display the arc A on the CRT 11 And

The component management unit 31 has a function of registering component data in the component data memory 32, a function of setting the identifier of component data selected by the operator in the selection list 33, and a function of storing the component data in the component data memory 32. It has a function to delete data.

The group management means 4 includes a group management unit 41
And a group element data memory 42.

In the group element data memory 42, FIG.
As shown in (1), (N + 1) areas # 0 to #N are provided, and group data of group numbers 0 to N are registered in each of the areas # 0 to #N.

Each area # of the group element data memory 42
Group data registered in each of 0 to #N includes a group number, a group name given by an operator,
Display status indicating whether or not it is currently displayed (displayed if it is currently displayed, hidden if not), and the identifier of the component data corresponding to the nodes and arcs belonging to the group And an element set that is a set of The group data of group number 0 includes the identifiers of all the component data registered in the component data memory 32 as an element set.
The group data of group numbers 1 to N are for operator definition.

FIG. 5 is a diagram showing group data registered in the area # 1 of the group element data memory 42.
Information indicating that the group number is “1”, information indicating that the group name is a control flow, information indicating that the group is currently being displayed, and nodes and arcs belonging to the group And an element set indicating that the identifier of the component data is “2, 3, 6”.

The group management unit 41 registers and corrects group data.

The group synthesizing unit 5 obtains the union of the element sets in the plurality of group data instructed to be displayed by the operator, and displays the display state of the constituent element data which is an element of the union. Hide the display state of the component data other than.

The graph structure diagram input / output unit 6 inputs / outputs component data between the component data memory 32 and the file device 8, and inputs group data between the group component data memory 42 and the file device 8. Output.

The display management section 7 has display coordinate information for displaying a figure on the CRT 11, and the display state of the component data stored in the component data memory 32 is displayed. Is displayed on the CRT 11. The display management unit 7 also has an enlargement / reduction function for the entire figure. In the present embodiment, the display state for controlling whether to display each component of the graph structure diagram is managed in the component data memory 32. However, the display management unit 7 manages the display state. Can also.

Next, the operation of this embodiment will be described.

First, the operation at the time of node registration will be described.

When registering a node, the operator first
The user inputs a node registration instruction using the keyboard or the keyboard 10, then inputs the position of the node, the shape of the node, and if necessary, inputs a label attached to the node. When all necessary information is input, the operator instructs the end of the input.

These pieces of information are provided to the operation analysis unit 2 via the input / output unit 1. The operation analysis unit 2 issues a node registration instruction,
When the position of the node, the shape of the node, and the like are given, they are output to the component managing unit 31, and when the input end is instructed, the component managing unit 31 is notified to that effect.

When a node registration instruction is given, the component management unit 31 sets the type information in the component data to a node as shown in the flowchart of FIG. 6 (step S1), and furthermore,
When the position of the node, the shape of the node, and the label are input,
The position information, the shape information, and the label in the component data are input (steps S2 to S5).

Thereafter, when the end of the input is instructed (YES in step S6), the component managing section 31 sets the input arc and the output arc in the component data to NULL, displays the display state, and sets an identifier. To create component data (step S7). When the component data is created in this way, the component management unit 31 registers the created component data in the component data memory 32 (step S8).

Next, the operation at the time of arc registration will be described.

At the time of arc registration, the operator first inputs an arc registration instruction using the mouse 9 or the keyboard 10.
After that, the start and end nodes of the arc and the shape of the arc to be registered are input. Further, when the arc is to be a broken line, the coordinate value of the break point is input. If necessary, a label to be given to the arc is input. When all necessary information is input, the operator instructs the end of the input.

These pieces of information are provided to the operation analysis section 2 via the input / output section 1. The operation analysis unit 2 issues an arc registration instruction,
When a node serving as a starting point and an ending point of an arc, a shape of an arc, and the like are given, these are given to a component managing unit 31, and when an input end is instructed, the component managing unit 31 is notified of that.

When the arc registration instruction is input, as shown in the flowchart of FIG. 7, the component management unit 31 sets the type information in the component data to an arc (step S11), and inputs the start node and the end node. Then, the coordinate values of the starting point and the ending point of the arc are obtained, and the obtained coordinate values are set in the coordinate sequence in the component data (step S12). Further, the component management unit 31 sets the start node and the end node in the component data as input (step S13).

Thereafter, when the shape of the arc is input, the component managing unit 31 changes the shape information in the component data to the input (step S14), and when the coordinate value of the break point is input (step S14). S15 is YES), the input coordinate values are inserted between the coordinate values of the start point and the end point already set in the coordinate sequence of the component element data (step S16).
When the label is input (YES in step S17), the label in the component data is set to the input (step S18).

After that, when the end of the input is notified (YES in step S19), the component management unit 31 displays the display state in the component data, and further creates the component data by setting the identifier ( Step S20).
When the component data of the arc is created as described above, the component management unit 31 registers the created component data in the component data memory 32 (step S2).
1). Further, the component management unit 31 stores, in the component data registered in the component data memory 32, the output arc and the input arc of the component data corresponding to the nodes serving as the start node and end node of the arc registered this time. Set the identifier of the arc registered this time (step S2
2).

Next, a description will be given of an operation for selecting a component which is performed in advance when registering group data, deleting a component, or moving a component.

At the time of selecting a component, the operator first inputs a component selection instruction from the mouse 9, keyboard 10, or the like. The operator then makes a component selection.
The selection of a component is performed by either a point designation or a rectangle designation.

When selecting a component by designating a point, the operator positions the mouse cursor on the component to be selected among the nodes and arcs of the graph structure diagram displayed on the CRT 11 and clicks on it, and then coordinates the point. Enter a value. When selecting a plurality of components, the above operation is repeated. When all necessary components have been selected, the operator inputs an end of selection.

When a component is selected by specifying a rectangle, the operator operates the mouse 9 to operate the CRT 1.
Among the nodes and arcs in the graph structure diagram displayed in 1, a component to be selected is surrounded by a rectangle, and a coordinate value indicating the rectangle is input. If a necessary component cannot be selected by one operation, the above operation is repeated. Also,
When all necessary components have been selected, the operator inputs an end of selection.

Each of the above information is given to the operation analysis unit 2 via the input / output unit 1. When given a component selection instruction, coordinate values of points, coordinate values of rectangles, and the like, the operation analysis unit 2 provides them to the component management unit 31 and, when the selection end is input, notifies the component management unit 31 of the fact. Notify 31.

When a component selection instruction is given, the component management unit 31 starts the processing shown in the flowchart of FIG. 8, and when a coordinate value of a point is input, a configuration corresponding to the component existing at the point The identifier of the element data is obtained from the element data memory 32 (steps S31 and S32). Also,
When the coordinate value of the rectangle is input, the identifier of the component data corresponding to the component existing in the rectangle is obtained from the component data memory 32 (steps S31 and S3).
3). Next, it is determined whether or not the display state of the obtained component is in the display state (step S34), and only the component whose display state is in the display state is set in the selection list (step S35).

Thereafter, every time the coordinate value of a point or the coordinate value of a rectangle is input, the component management unit 31 performs the same processing as described above, and when the selection end is instructed (YES in step S36), The process ends.

Next, the operation when registering group data will be described.

When registering group data, the operator first selects components to be included in the group. This selection is performed by the above-described point designation or rectangle designation, and the identifier of the component data corresponding to the selected component is set in the selection list 33.

When a component to be included in a group is selected,
In order to register the group data, the operator inputs a group data registration instruction from the mouse 9 or the keyboard 10 and a group number of the group data to be registered, and further inputs a group name when giving a group name to the group data. I do.

The group data registration instruction, group number, and group name input from the mouse 9 and the keyboard 10 are given to the operation analysis unit 2 via the input / output unit 1. When given the group data registration instruction, the group number, and the group name, the operation analysis unit 2 gives them to the group management unit 41.

When given a group data registration instruction and a group number, the group management section 41 searches the group element data memory 42 for group data of the group number designated by the operator, and displays the display state in the group data. (Step S41).

Thereafter, the group management section 41 inquires of the component management section 31 about the contents of the selection list 33 and acquires the contents of the selection list 33 (step S42). Here, in the selection list 33, the identifier of the component data corresponding to the component to be included in the group data registered this time is set.

Upon acquiring the contents of the selection list 33, the group management unit 41 adds the contents of the selection list to the element set of the group data found in step S41 (step S43).

Further, if the group name is input (YES in step S44), the group management section 41 proceeds to step S44.
The input group name is set in the group data found in 41 (step S45).

Next, the operation for deleting the component data registered in the component data memory 32 will be described.

When deleting the component data, the operator first selects the component data to be deleted. This selection is made by specifying the point or rectangle as described above.
The identifier of the component data corresponding to the selected component is set in the selection list 33.

When the component data to be deleted is selected, the operator inputs a component delete instruction from the mouse 9 or the keyboard 10.

This component deletion instruction is given to the component management unit 31 via the input / output unit 1 and the operation analysis unit 2.

When a component deletion instruction is given, the component management unit 31 first sets the contents of the selection list 33 in the deletion list as shown in the flowchart of FIG. 10 (step S51).

Next, the component management unit 31 adds to the deletion list the identifier of the arc whose identifier is not included in the deletion list and which is connected to the node whose identifier is included in the deletion list. (Step S5
2).

Thereafter, the component management unit 31 deletes the component data having the identifier set in the deletion list from the component data memory 32 (step S53).

Further, the component management unit 31 passes the contents of the deletion list to the group management unit 41, and instructs to delete the group element (step S54).

When the group management unit 41 is given the contents of the deletion list and instructed to delete the group element, it first sets k = 0 as shown in the flowchart of FIG. 11 (step S6).
1) Then, it is determined whether or not the identifier set in the deletion list exists in the element set of the group data of the group number k stored in the group element data memory 42 (step S62).

If it is determined that the data does not exist (NO in step S62), the group management unit 41 adds k to +1.
Yes (step S64). If it is determined that the identifier exists (YES in step S62), the process proceeds to step S64 after deleting the identifier set in the deletion list from the element set of the group data with the group number k.

When the processing in step S64 is completed, the group management section 41 determines whether or not k = N + 1, that is, whether or not all the group data of group numbers 0 to N have been checked (step S65).

Then, if it is determined that all have been checked (step S65 is YES), the process is terminated, and if it is determined that all have not been checked (step S65 is NO), step S62 is performed.
Is performed again.

Next, the operation at the time of group release will be described.

When releasing the group, the operator inputs a group release instruction using the mouse 9 or the keyboard 10 and also inputs the group number of the group data to be released.

The input group release instruction and group number are given to the group management section 41 via the input / output section 1 and the operation analysis section 2.

The group management section 41 issues a group release instruction,
When the group number is given, as shown in the flow chart of FIG. 12, first, the group data of the above group number is searched from the group data stored in the group element data memory 42 (step S71).

Next, the group management unit 41 proceeds to step S
Delete the set of group data found in 71
(Step S72), and further, the display state is hidden (Step S73).

Thereafter, the group management section 41 proceeds to step S
It is determined whether a group name is defined in the group data found in 71 (step S74), and if defined, the group name is deleted (step S75).

Next, the operation at the time of moving the component will be described.

When moving the nodes and arcs in the graph structure diagram displayed on the CRT 11, the operator first selects the nodes and arcs to be moved. This selection is performed by the above-described point designation or rectangle designation. The identifier of the component data corresponding to the component to be moved selected by specifying the point or the rectangle is set in the selection list 33.

When a component to be moved is selected, the operator inputs a component moving instruction using the mouse 9 or the keyboard 10 and also inputs a movement vector indicating a moving amount and a moving direction.

The input component movement instruction and movement vector are given to the component management unit 31 via the input / output unit 1 and the operation analysis unit 2.

When the component movement instruction and the movement vector are given, the component management unit 31 stores the selection list 33 among the component data registered in the component data memory 32 as shown in the flowchart of FIG. The component selected by the operator is moved by updating the position information of the component data in which the identifier is set according to the movement vector (step S81).

Further, the component management unit 31 is not included in the selection list 33 in the component data memory 32,
If there is an arc whose start point node is a node in the selection list 33, the coordinate value of the start point of the arc is updated according to the movement vector, and the arc is moved (step S82).

Further, the component management unit 31 is not included in the selection list 33 in the component data memory 32,
If there is an arc whose end point node is a node in the selection list, the coordinate value of the end point of the arc is updated according to the movement vector, and the arc is moved (step S
83).

Next, the operation at the time of group combination will be described.

At the time of group combining, the operator inputs a group combining instruction using the mouse 9 or the keyboard 10 and also inputs the group number of the group to be combined.

The group combining instruction and the group number are given to the group combining section 5 via the input / output section 1 and the operation analyzing section 2.

When the group synthesizing unit 5 is given the group synthesizing instruction and the group number, as shown in the flowchart of FIG. 14, of the group data in the group element data memory 42, The display state is displayed, and the display states of other group data are not displayed (step S91).

Next, the group synthesizing unit 5 obtains an element set in the group data having the input group number (step S92), and further obtains a union of the obtained element sets (step S93).

Thereafter, the group synthesizing unit 5 hides the display state of all the component data in the component data memory 32 (step S94), and further displays the component data registered in the component data memory 32. Among them, the display state of the union whose identifier belongs to the union obtained in step S93 is displayed (step S95). As a result, the components belonging to the group designated by the operator become CRT1
1 is displayed.

Now, for example, in the group structure diagram of FIG. 15, the identifiers of the nodes Na and Nb and the arc A (1,
Group data having a group number i having an element set of (2, 5) and a group number j having identifiers (2, 4, 8) of nodes Nb, Nd and arc D as an element set
It is assumed that the group data is designated.

The group synthesizing unit 5 displays the display state of the group data of the group numbers i and j among the group data registered in the group element data memory 42,
The display state of the other group data is hidden (step S91).

Thereafter, the group synthesizing unit 5 outputs the identifier (1,
2,5) and the union (1,2,2) of the identifiers (2,4,8)
4, 5, 8, () (step S93), and among the display states of the component data registered in the component data memory 32, the component data having the identifier (1, 2, 4, 5, 8) Is displayed (Steps S94, S9)
5). As a result, the nodes Na, Nb, and Nd whose identifiers are (1, 2, 4, 5, 8) and the arcs A and D correspond to the CRT 11
Will be displayed.

Next, the operation for storing the component data and group data registered in the component data memory 32 and the group data memory 42 will be described.

When saving the component data and the group data, the operator inputs a save instruction and a save file name using the mouse 9 and the keyboard 10.

This save instruction is input / output unit 1, operation analysis unit 2
Is input to the graph structure diagram input / output unit 6 via

When a save instruction is input, the graph structure diagram input / output unit 6 stores the component data registered in the component data memory 32 and the group data registered in the group element data memory 42 in the file device 8. Save to a file with the file name specified by the operator.

Next, the component data and group data stored in the file device 8 are stored in the component data memory 3.
2, registered in the group element data memory 42, CRT1
The operation for changing the display of No. 1 to the state at the time of saving will be described.

When the display of the CRT 11 is set to the state at the time of saving, the operator uses the mouse 9 and the keyboard 10 to input a read instruction and a file name of a file to be read.

The read instruction and file name are input / output unit 1,
It is input to the graph structure diagram input / output unit 6 via the operation analysis unit 2.

When a read instruction and a file name are input, the graph structure diagram input / output unit 6 registers the component data and group data stored in the file device 8 in the component data memory 32 and the group component data memory 42. I do.
As a result, the display on the CRT 11 is in the state at the time of saving.
When the operator wants to check which group is displayed on the CRT 11, the operator inputs a confirmation instruction using the mouse 9 and the keyboard 10. This confirmation instruction is given to the group management unit 41 via the input / output unit 1 and the operation analysis unit 2.

When the confirmation instruction is input, the group management section 41 refers to the group element data memory 42 and acquires the group number of the group data whose display state is displayed. When the group number is acquired, the group management unit 41 passes the acquired group number to the display management unit 7. As a result, the display management unit 7 displays the passed group number on the CRT 11.

[0101]

As described above, according to the present invention, the glue
Manages a set of components belonging to the group for each
Element data for registering group data for
And a group synthesizing means for performing a set operation on a set of components belonging to the selected group and setting only the components indicated by the operation result as display target components. If you want to display only a part of the graph structure diagram, it is only necessary to select the group that includes that part. There is an effect that only a part can be displayed.
In addition, the present invention is configured such that when an instruction to delete a component is issued,
The component management unit is instructed to delete from the component data memory.
Delete the shape and position corresponding to the
Is stored in the group element data memory.
For each group data to be deleted.
Check if the component is included
For data, delete the identifier of the component instructed to be deleted.
Includes the identifier of the component for which deletion was instructed
Even if there is a lot of group data,
Data is issued only once,
Of deletion target component from all group data to be deleted
There is an effect that the child can be deleted.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an example of component element data of a node;

FIG. 3 is a diagram showing an example of component data of an arc.

FIG. 4 is a diagram showing a configuration example of a group element data memory 42;

FIG. 5 is a diagram showing an example of graph data.

FIG. 6 is a flowchart illustrating an example of a process performed by the component management unit 31 when registering a node.

FIG. 7 is a flowchart showing an example of a process performed by the component management unit 31 at the time of arc registration.

FIG. 8 is a flowchart illustrating an example of processing performed when a component is selected by the component management unit 31;

FIG. 9 is a flowchart illustrating an example of processing performed by the group management unit 41 when registering group data.

FIG. 10 is a flowchart illustrating an example of a process performed by the component management unit 31 when a component is deleted.

FIG. 11 is a flowchart illustrating an example of processing performed by a group management unit 41 when deleting a group element.

FIG. 12 is a flowchart illustrating an example of processing performed by a group management unit 41 when a group is released.

FIG. 13 is a flowchart illustrating an example of a process performed by the component management unit 31 when the component is moved.

FIG. 14 is a flowchart showing an example of processing performed by the group synthesizing unit 5 when synthesizing groups;

FIG. 15 is a diagram showing an example of a graph structure diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Input / output part 2 ... Operation analysis part 3 ... Component management means 31 ... Component management part 32 ... Component data memory 33 ... Selection list 4 ... Group management means 41 ... Group management part 42 ... Group element data memory 5 ... Group synthesis unit 6 ... Graph structure diagram input / output unit 7 ... Display management unit 8 ... File device 9 ... Mouse 10 ... Keyboard 11 ... CRT

Claims (2)

(57) [Claims] 1. A component data memory in which a shape and a position of each component of a graph structure diagram are registered, and a shape and a position of an input component are stored in the component data.
Registered in the data memory, and
The corresponding shape and position from the component data memory
It contains a component management unit to be deleted and an identifier indicating a component belonging to a group.
A group for managing a set of components belonging to a loop
And group element data memory Pudeta are registered, each group registered in the group element data memory
Component for which the deletion was instructed for each data
Checks whether it contains the identifier of
For the data, the identification of the component designated to be deleted
A group management unit for deleting a child, and a group registered in the group element data memory.
Of the set of components managed by
A group combining unit that performs a set operation on a set of components belonging to the selected group and uses the component indicated by the set operation result as a display target component; And a display management means for displaying only elements on a display device. 2. The graph structure diagram data display management device according to claim 1, wherein the set operation is a union operation.