JP3199071B2 - Data display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-window type data display device for displaying a related structure of predetermined related tree-like data.

[Conventional technology]

Conventionally, in this type of apparatus, when displaying a related structure (tree structure) of tree-like data (nodes), which is a place of information on an object such as a file, a record, or a user, each of the nodes is displayed on a screen. The image data, the data (coordinate value) of the screen display area on the window coordinate system, the data of the ordered set of lower nodes, and the like are each represented as a node object and stored in the real memory. The processing unit (CPU)
A predetermined window is opened on the screen of the display device, the arrangement of nodes is calculated in accordance with each of the node objects, a tree structure of the nodes is displayed in the window, and new nodes are added or deleted. If the number of nodes is large and the tree structure cannot be displayed collectively in the window, the screen in the window is scrolled to display the tree structure composed of lower nodes.

[Problems to be solved by the invention]

However, in the above-described apparatus, as the number of nodes increases, the time required for the layout calculation and display of each node increases. (For example, an erroneous operation such as mistakenly deleting a node to be deleted from another node).

The present invention has been made in view of the above problems, and enables partial display of a related structure of nodes to reduce the time required for the layout calculation and display of each node, and to prevent erroneous operation by a user to improve operability. It is an object to provide a data display device that can be improved.

[Means for solving the problem]

In order to achieve the above object, the present invention relates to a data display device for displaying, by a display means, a first window for displaying a tree structure including a plurality of nodes.
A node designating means for designating a predetermined node from the tree structure displayed in the window, and a first tree structure for displaying a sub-tree structure including the node designated by the node designating means and its lower nodes. Display control means for newly creating a second window different from the window, and displaying a subtree structure including the node designated by the node designation means and its lower nodes in the created second window. It is characterized by having.

The present invention also relates to a data display method for displaying a first window for displaying a tree structure including a plurality of nodes by a display means, wherein a predetermined window is selected from the tree structure displayed in the first window. Specifying a node, newly creating a second window different from the first window for displaying a sub-tree structure including the specified node and its lower nodes, A subtree structure including the specified node and its lower nodes is displayed in a window.

[Action]

A predetermined node that the user wants to recognize is specified from each node displayed on the display device, and a tree structure display instruction is given to display a lower tree structure below the specified predetermined node in a window on the screen.

Therefore, partial display of the tree structure can be performed, and the number of nodes to be displayed can be reduced. Therefore, operability in displaying the tree structure can be improved.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings of FIGS.

FIG. 1 is a block diagram showing a schematic configuration of a data display device according to the present invention. In the figure, a real memory 11 stores image data to be displayed on a screen of a display device 17 to be described later, data of a screen display rectangular area on a window coordinate system (the size of a node to be displayed) as shown in FIG. Each node is stored as a node object that holds data of an ordered set of lower nodes (data of a pointer function indicating a direct lower node).

The keyboard 12 and the mouse 13 are used to input an instruction to display a tree structure of a node, to specify a predetermined node from each node of the displayed tree structure according to the subtree creation display of the present invention, and to specify a lower level after the specified predetermined node. Of the tree structure is displayed.

The keyboard / mouse control unit 14 outputs an instruction and a designation according to an input from the keyboard 12 or the mouse 13 to a central processing unit (CPU) 15.

The CPU 15 controls the real memory 11 and the display control unit 16, and writes or reads data of a node object to or from the real memory 11 in accordance with an instruction and designation from the keyboard / mouse control unit 14. , Or instructs the display of a tree structure or performs arithmetic processing.

The display control unit 16 controls the display device 1 in accordance with the instruction from the CPU 15.
7 display control is performed.

The display device 17 includes a display such as a CRT, and displays a tree structure of nodes A to F and a menu 18 on the screen 19 according to the control of the display control unit 16 as shown in the embodiment of FIG.
These are displayed in windows 20 and 21 above. Display device
17 also displays on the screen 19 a cursor 22 linked to the movement of the mouse 13. The menu 18 instructs an operation on the tree structure of the nodes A to F displayed in the window 20. The menu 18 includes the transfer, deletion, and file name change of the displayed nodes, and the tree according to the present invention. There is a function content such as subtree creation display to select and display some tree structure (subtree) from the structure,
The selection of the above contents is performed by moving the cursor 22 to the display position of the contents to be selected with the mouse 13 and clicking the mouse button. The selection of a node to be processed by the selected function is also performed by the mouse 13 and the cursor 22. The window 21 is a subtree window for displaying a node selected from the tree structure of the nodes A to F by the subtree creation display function, for example, a partial tree structure (subtree) after the node B.

Next, the operation of node selection and subtree creation display according to the present invention will be described in detail with reference to the flowcharts of FIGS.

FIG. 4 is a flowchart for explaining an operation of selecting a node to be processed in the subtree creation display.
In the figure, i indicates the number of the node in the tree structure,
N indicates the total number of the nodes. Px and Py indicate position data on the coordinate system of the display screen, that is, coordinate values in the X and Y directions, and Wx and Wy indicate the X and Y directions of the window 20 on the coordinate system of the display screen. Indicates the minimum coordinate value, X
(I), X (i) + dx are the minimum and maximum coordinate values in the X direction among the display positions of the nodes on the coordinate system of the window 20, and Y (i), Y (i) + dy are the window positions. The minimum coordinate value and the maximum coordinate value in the Y direction among the display positions of the nodes on the 20 coordinate systems are shown.

The CPU 15 first determines whether or not the button of the mouse 13 has been clicked (step 101). When the button is clicked, the CPU 15 detects the display position (Px, Py) of the cursor 22 at that time (step 102). Once the above display position is determined,
Next, the node number i is initialized to 0 (step 10).
3) The detected display position (Px, Py) is the display position X (i) + Wx ≦ Px ≦ X of the i-th node set in step 103
(I) + dx + Wx, and Y (i) + Wy ≦ Py ≦ Y (i) +
Judge whether it is within the range of dy + Wy (Step 10
Four).

Here, if the display position (Px, Py) is not within the range of the set display position, 1 is added to the value of i to make the next node one level lower (step 105). Is greater than N, which indicates the total number of nodes (step 106).

Here, when the value of i becomes larger than N,
Judge that the node is not selected (step 10
7) End the above operation. If the value of i is smaller than N, the process returns to step 104 to determine whether the value is within the range of the display position of the next node.

If the display position (Px, Py) is within the set display position in step 104, a node object representing the i-th node is selected (step 108). The display area of the node is highlighted as shown in FIG. 3 (step 109), and the above operation ends.

FIG. 5 is a flowchart for explaining the operation of subtree creation display according to the present invention. In the figure, the CPU 15 first determines whether both buttons of the mouse 13 have been pressed (step 201), and when both buttons are pressed, opens a menu in the window 20 (step 20).
2). Then, it is determined whether or not the content of the menu has been selected (step 203).

Here, if the menu is not selected within the predetermined time, it is determined that the operation is not the subtree creation display operation, and the operation ends. If a menu is selected, it is determined whether the selection is a selection of a partial display indicating a subtree creation display (step 204).

Here, if the above selection is not a selection of partial display, other selected instructions, for example, instructions such as transcription, deletion, and file name change in the menu, are sent to the node designated in FIG. (Step 205). Also,
If the selection is a partial display selection, it is determined whether there is a node already selected (step 206).

Here, if there is no selected node, the operation of the subtree creation display is terminated. Also, if there is a selected node, based on the node object existing for each selected node and its lower nodes, the selected node and all nodes up to its lower end A copy is created (step 207).
In the embodiment shown in FIG. 3, the node B is selected, a copy is made for the node B and all the nodes C and D up to the lower end thereof, and the copy is made to the storage area of the real memory 11. The data of the node object is stored. Then, a new subtree window 21 is created and displayed on the screen 19 of the display device 17 (step 208), and the node groups B to D copied on the window 21 are displayed in the third window.
As shown in the figure, the display is performed based on the node B (step 209).

Therefore, according to the present invention, the subtree creation display function allows an area for displaying a subtree, which is a partial tree structure of the tree structure, which the user wants to pay attention to be displayed on the screen of the display device, separately from an area for displaying all tree structures. Since only the subtree can be displayed, partial display of the tree structure can be performed, and the number of nodes to be displayed can be reduced. Therefore, the time required for the layout calculation and display of each node can be reduced, and the user's understanding of the node can be increased, thereby preventing the user from erroneously operating the node.

〔The invention's effect〕

As described above, in the present invention, the number of nodes displayed by redisplay can be limited to a portion required by the user, so that the display time is reduced, and the display of the tree structure is quick and easy. At the same time, it is possible to increase the user's understanding of the node and prevent erroneous operations,
Thereby, the operability in displaying the tree structure of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a data display device according to the present invention, FIG. 2 is a diagram showing an embodiment of a data configuration of a node object expressing a node, and FIG. 3 is shown in FIG. FIGS. 4 and 5 are diagrams showing screens of the display device, and FIGS. 4 and 5 are flowcharts for explaining the operation of selecting a node of the data display device shown in FIG. 1 and creating and displaying a subtree according to the present invention. 11 ... real memory, 12 ... keyboard, 13 ... mouse, 14
... keyboard / mouse control unit, 15 central processing unit (CPU), 16 display control unit, 17 display device, 18
Menu, 19 …… Display screen, 20,21 …… Window, 22
……cursor.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 3/14

Claims (2)

(57) [Claims] 1. A data display device for displaying, by a display means, a first window for displaying a tree structure including a plurality of nodes, wherein a predetermined node is selected from the tree structure displayed in the first window. A new window different from the first window for displaying a subtree structure including the node specified by the node specifying unit and its lower nodes, and Display control means for displaying, in the created second window, a subtree structure including the node designated by the node designation means and its lower nodes. 2. A data display method for displaying, by a display means, a first window for displaying a tree structure including a plurality of nodes, wherein a predetermined node is selected from the tree structure displayed in the first window. And newly creating a second window different from the first window for displaying a subtree structure including the designated node and its lower nodes, and the created second window Displaying a subtree structure including the designated node and its lower nodes.