JPH1196028A - Display device, display method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of clearly distinguishing a case that an element arranged on a lower node is not displayed due to any cause though the lower node practically exists from a case that a lower node does not practically exist and an element on the lower node is not displayed in the case of displaying the element on the lower node of a non-terminal node. SOLUTION: In the case of displaying a lower object included in required container objects on a screen displaying respective objects, operation for displaying the lower object is executed. When the operation is executed, the lower object is retrieved, and at the time of judging that the lower object is not included in the container objects based on the retrieved result (steps S1, S2), a message 'no object' is displayed (step S3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, a display method, and a storage medium for displaying elements on each node in a set having a tree structure, including non-terminal nodes that may have lower nodes. .

[0002]

2. Description of the Related Art The Novell NetWare (registered trademark of Novell) operating system provides a database called NetWare Directory Service. The Net Ware directory service provides features for storing, accessing, managing, and using various information about resources. Here, resources refer to organizations, users, groups, printers, and the like. Ne
The tWare directory service can centrally manage resources scattered on a computer network. That is, even when resources are scattered at different positions on the network, they can be represented as a single group, and the resources can be operated without being aware of the positions of the resources on the network. In the NetWare directory service, a set of resources is represented as a hierarchical structure having multiple layers of resources, that is, a tree structure.

[0003] The elements of the tree structure of the Net Ware Directory Service are called objects, and there are three types of objects. One of these objects is an object called a root object located at the top of the tree structure. The other is an object that can store another object, that is, an object called a container object that has a possibility that a lower object exists on the tree structure. Still another object is an object that does not include an object, that is, an object called a leaf object that has no lower-level object in the tree structure.

In the Net Ware directory service, as a method of displaying a list of objects, a method of displaying objects according to their hierarchical structure is used. For example, as shown in FIG. 8, the root object and the container object 1 are displayed according to their respective hierarchical structures. Here, since there is a possibility that the lower object included in the container object 1 is included in the container object 1, when displaying the lower object included in the container object 1, the container object 1 is selected by an input device such as a mouse. Perform an operation for displaying an object below it. By this operation, a lower object is searched for in the container object 1, and it is determined based on the search result whether the lower object is included in the container object 1. If it is determined that the lower-level object is included in the container object 1, the lower-level object is displayed. If it is determined that the lower-level object is not included in the container object 1, it is determined that there is no object to be displayed. And nothing is displayed.

[0005]

As described above, according to the conventional display method, if it is determined that the lower level object is not included in the container object 1 based on the search result, it is determined that there is no object to be displayed. Since nothing is displayed, the absence of this display allows the user to recognize that the lower level object is not included in the container object 1. However, even though there are actually objects to be displayed, there are cases where the objects are not displayed for some reason. In this case, the user recognizes that no lower-level object is included in the container object 1 as in the case where it is determined based on the search result that the lower-level object is not included in the container object 1 and nothing is displayed. In other words, if there is an object to be displayed but the object is not displayed for some reason,
It cannot be distinguished from the case where there is no object to be actually displayed and the case where the object is not displayed.

An object of the present invention is to display an element located on a lower node of a non-terminal node when displaying an element located on the lower node for some reason although there is actually a lower node. To provide a display device, a display method, and a storage medium capable of explicitly distinguishing between a case where an element to be displayed is not displayed and a case where an element on the lower node is not actually displayed because there is no lower node. is there.

[0007]

According to the first aspect of the present invention,
In a display device for displaying an element on each node in a set having a tree structure including a non-terminal node having a possibility that a lower node exists, displaying an element located on a node lower than the non-terminal node A search unit that searches the lower node of the non-terminal node with reference to the tree structure, and determines whether the lower node exists in the non-terminal node based on a search result of the search unit. When the determination unit determines that a lower node exists in the non-terminal node, an element located on a lower node of the non-terminal node is displayed, and the determination unit determines When it is determined that the lower node does not exist in the non-terminal node, a message indicating that the lower node does not exist in the non-terminal node is displayed. To.

According to a second aspect of the present invention, in the display device according to the first aspect, the tree structure includes a data structure of a computer system.

According to a third aspect of the present invention, in the display device according to the second aspect, the data structure of the computer system includes a directory tree of a Net Ware (registered trademark) directory service.

According to a fourth aspect of the present invention, there is provided a display method for displaying an element on each node in a set having a tree structure, including a non-terminal node having a possibility that a lower-level node may exist. When displaying an element located on a lower node, a step of searching for a lower node of the non-terminal node with reference to the tree structure, and based on the search result, the lower node is added to the non-terminal node. Determining whether or not there is a node; and, if it is determined that the lower node exists in the non-terminal node, displaying an element located on a lower node of the non-terminal node; Displaying a message indicating that there is no lower node of the non-terminal node if it is determined that the lower node does not exist in the node. .

According to a fifth aspect of the present invention, in the display method according to the fourth aspect, the tree structure includes a data structure of a computer system.

According to a sixth aspect of the present invention, in the display method according to the fifth aspect, the data structure of the computer system includes a directory tree of a Net Ware (registered trademark) directory service.

According to a seventh aspect of the present invention, the information processing apparatus reads a program for displaying elements on each node in a set having a tree structure, including non-terminal nodes that may have lower nodes. In the storage medium in which the non-terminal node is stored, the program searches for the lower node of the non-terminal node by referring to the tree structure when displaying the element located on the lower node of the non-terminal node. A module for determining whether or not a lower node exists in the non-terminal node based on the search result; and determining that the lower node exists in the non-terminal node, An element located on a lower node of the node is displayed, and if it is determined that the lower node does not exist in the non-terminal node, the non-terminal node is determined. And having a control module lower node de controls to display a message indicating the absence.

According to an eighth aspect of the present invention, in the storage medium according to the seventh aspect, the tree structure includes a data structure of a computer system.

According to a ninth aspect of the present invention, in the storage medium of the eighth aspect, the data structure of the computer system includes a directory tree of a Net Ware (registered trademark) directory service.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing the configuration of a personal computer constituting a first embodiment of the display device of the present invention.

As shown in FIG. 1, a personal computer (hereinafter referred to as a personal computer) 500 reads out and executes a system program stored in a ROM 502 to perform system control and arithmetic processing of the entire apparatus, and to perform necessary processing. The HD (hard disk device) 511 or the FD (floppy disk device) 51
CPU 50 that performs a corresponding process by reading and executing a corresponding application program from
1 is provided. The RAM 503 is used as a work area as the CPU 501 executes the processing.
Reference numeral 3 is used as an area into which the above-described application program and data necessary for executing the application program are loaded.

The CPU 501 has a KBC (keyboard control unit) 505, a CRTC (display control unit) 506,
DKC (disk control unit) 507 is connected to the system bus 504
Connected through.

The KBC 505 is a KB (keyboard) 50.
9 or a mouse (not shown), and performs control for transmitting the key signal to the CPU 501 via the system bus 504. CRTC 506 is a CPU
CRT to display application execution results by 501
Display control for displaying on the 510 is performed. DKC507
Write data to HD 511 or FD 512,
Controls reading.

The HD 511 previously stores a tree structure display control program for displaying elements on each node in a set having a tree structure, including non-terminal nodes that may have lower nodes. I have.
In the present embodiment, a tree structure display control program for displaying objects in a tree structure representing a set of resources on a computer network managed by the NetWare directory service is stored. The tree structure display control program includes a search module that searches for a lower object of a container object by referring to the tree structure when displaying a lower object of the container object, and displays a lower object of the container object based on the search result. A determination module that determines whether or not an object exists, and when it is determined that a lower object exists in the container object, the lower object of the container object is displayed, and the lower object does not exist in the container object. And a control module that controls so as to display a message indicating that no lower-level object exists.

In the present embodiment, the tree structure display control program is stored in the HD 511 in advance. Alternatively, a floppy disk, a storage medium for supplying the tree structure display control program, or the like may be used. Optical disk, magneto-optical disk, CDROM, CD-
R, a magnetic tape, a nonvolatile memory card, a ROM, and the like can be used. As an example of supplying the tree structure display control program from the storage medium, a case where the tree structure display control program is supplied from a CD-ROM will be described with reference to FIG. FIG. 2 shows FIG.
FIG. 4 is a diagram showing a memory map of a CD-ROM for supplying a tree structure display control program to the personal computer of FIG.

As shown in FIG. 2, the CD-ROM has an area 9999 in which directory information is stored. The directory information in the area 9999 includes the position of the area 9998 storing the installation program and the tree structure. The position of the area 9997 storing the network device control program including the display control program is shown.

When the tree structure display control program is installed in the personal computer 500, first, the installation program stored in the area 9998 is loaded according to the directory information and executed by the CPU 501. By executing this installation program, area 9
A tree structure display control program is read from 997 and stored in the HD 511. Thus, the tree structure display control program can be supplied to the personal computer 500.

Next, a procedure for displaying objects on the NetWare directory service by the tree structure display control program will be described with reference to FIGS. FIG. 3 is a flowchart showing a procedure for displaying a lower object of the container object, and FIG. 4 is a view showing an example of a display screen including a message displayed when no lower object of the container object exists.

On the screen where the root object and the container object are displayed according to their respective hierarchical structures,
When displaying a lower-level object included in the desired container object, a desired container object is selected by operating the KB 509 or the mouse, and an operation for displaying the lower-level object is performed. When this operation is performed, first, as shown in FIG. 3, a lower object of the desired container object is searched (step S1), and based on the search result, whether or not the lower object is included in the container object is determined. Is determined (step S2). If it is determined that the lower level object is included in the container object, the lower level object is displayed below the container object (step S3). On the other hand, if it is determined that the lower level object is not included in the container object, a message composed of a character string “Object does not exist” is displayed as a lower level object of the desired container object. For example, as shown in FIG. 4, when displaying a lower-level object included in a container object at a position indicated by 2 in the figure, if there is no lower-level object of this container object, "there is no object. "
Is displayed as a lower object at the position indicated by 2 in the figure (that is, the display position of the container object).

As described above, when displaying a lower object of the container object, when it is determined that the lower object exists in the container object,
Display the objects below the container object,
If it is determined that the lower-level object does not exist in the container object, control is performed to display a message indicating that the lower-level object does not exist.
Explicit distinction is made between the case where the lower-level object is not displayed for some reason despite the fact that there is a lower-level object, and the case where the lower-level object is not displayed because there is no actual lower-level object. Can be.

The present embodiment includes a case where the OS running on the computer is configured to execute a part or all of the processing included in the program. Further, after the program supplied from the storage medium is written to the extension function board mounted on the computer or the connected peripheral extension unit, the CPU provided on the extension function board or the peripheral extension unit executes the written program. It is also included.

The principle of the present invention can be applied to both a system including a plurality of devices (a system including a personal computer and an interface device) and an apparatus including a single device.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a flowchart showing a procedure for displaying a lower object of a container object according to the second embodiment of the display device of the present invention, FIG. 6 is a diagram showing an example of an object display screen, and FIG. FIG. 14 is a diagram showing an example of a display screen of a message when no object exists.

The present embodiment has the same configuration as the above-described first embodiment. In the present embodiment, when there is no lower-level object of the container object, the effect is different from the first embodiment. Is displayed in a dialog format.

When a desired object is selected by operating the KB 509 or the mouse and an operation for displaying an object below the desired object is performed, first, as shown in FIG. Then, it is determined whether or not the object includes a lower-level object based on the search result (step S6). If it is determined that the object includes a lower object, the lower object is displayed below the object (step S7). On the other hand, if it is determined that no lower-level object is included in the object, a message screen “Object does not exist” is displayed.

For example, as shown in FIG. 6, on the screen in which each object is displayed in accordance with the respective hierarchical structure, the object 3 is selected by the operation of the KB 509 or the mouse, and the operation for displaying the object below it is performed. When the search is performed, an object lower than the object 3 is searched, and based on the search result, the object 3 is searched.
It is determined whether or not includes a lower object. When it is determined that the lower-level object is not included in the object 3, the screen is switched as shown in FIG. 7, and a dialog box including a message "Object does not exist" is displayed.

[0034]

As described above, according to the display device of the first aspect, when an element located on a node below a non-terminal node is displayed, the tree structure is referred to to display the element. A search means for searching for a lower node; and a determination means for determining whether or not the lower node exists in the non-terminal node based on the search result of the search means. If it is determined that the node exists, the element located on the lower node of the non-terminal node is displayed. If the determination means determines that the lower node does not exist in the non-terminal node, the lower node of the non-terminal node is displayed. Message indicating that the node does not exist. Therefore, when displaying an element located on a node below the non-terminal node, there is actually a lower node. And if the element is located on the node it does not appear, actually can without subordinate nodes are elements on a node of the lower position to explicitly distinguish between not be displayed.

According to the display method of the fourth aspect, when displaying an element located on a node below the non-terminal node, a step of searching for a node below the non-terminal node by referring to a tree structure; Determining whether or not a lower node exists in the non-terminal node based on the search result; and determining that the lower node exists in the non-terminal node, The method includes a step of displaying the located element and a step of displaying a message indicating that a lower node of the non-terminal node does not exist when it is determined that the lower node does not exist in the non-terminal node. When displaying the element located on the lower node of the node, when the element located on the lower node is not displayed for some reason even though there is actually a lower node, It can lower node without elements on a node of the lower position to explicitly distinguish between not be displayed.

According to the storage medium of the present invention, when displaying an element located on a node below a non-terminal node, the program refers to the tree structure to search for a node below the non-terminal node. A search module that performs the search, a determination module that determines whether a lower node exists in the non-terminal node based on the search result, and a determination module that determines that the lower node exists in the non-terminal node. Control to display the element located on the lower node, and to display a message that there is no lower node of the non-terminal node if it is determined that the lower node does not exist in the non-terminal node When displaying an element located on a lower node of a non-terminal node, there is actually a lower node. And if the element is located on the node it does not appear, actually can without subordinate nodes are elements on a node of the lower position to explicitly distinguish between not be displayed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a personal computer that constitutes a first embodiment of a display device of the present invention.

FIG. 2 is a diagram showing a memory map of a CD-ROM for supplying a tree structure display control program to the personal computer of FIG.

FIG. 3 is a flowchart illustrating a procedure for displaying a lower object of a container object.

FIG. 4 is a diagram showing an example of a display screen including a message displayed when no lower object of the container object exists.

FIG. 5 is a flowchart illustrating a procedure for displaying a lower object of a container object according to the second embodiment of the display device of the present invention.

FIG. 6 is a diagram showing an example of an object display screen.

FIG. 7 is a diagram illustrating an example of a display screen of a message when there is no lower object of a container object.

FIG. 8 is a diagram showing a display example in a case where there is no object below a conventional container object.

[Explanation of symbols]

 501 CPU 502 ROM 503 RAM 505 KBC 506 CRTC 507 DKC 509 KB 510 CRT 511 HD 512 FD

Claims (9)

[Claims] 1. A display device for displaying an element on each node in a set having a tree structure including a non-terminal node having a possibility that a lower node may exist, wherein the element is located on a lower node of the non-terminal node. A search unit that searches for a lower node of the non-terminal node by referring to the tree structure when displaying an element to be executed, and a lower node exists in the non-terminal node based on a search result of the search unit. And determining whether or not there is a lower node in the non-terminal node by the determining means, display an element located on a lower node of the non-terminal node, When the determining means determines that the lower node does not exist in the non-terminal node, a message indicating that the lower node does not exist in the non-terminal node is displayed. A display device, comprising: 2. The display device according to claim 1, wherein the tree structure includes a data structure of a computer system. 3. The display device according to claim 2, wherein the data structure of the computer system includes a directory tree of a Net Ware (registered trademark) directory service. 4. A display method for displaying an element on each node in a set having a tree structure including a non-terminal node having a possibility that a lower node may exist, wherein the element is located on a node lower than the non-terminal node. Searching for a lower node of the non-terminal node by referring to the tree structure when displaying an element to be executed, and determining whether or not a lower node exists in the non-terminal node based on the search result. Determining, and if it is determined that a lower node exists in the non-terminal node, displaying an element located on a lower node of the non-terminal node; and displaying the lower node on the non-terminal node Displaying a message indicating that there is no lower node of the non-terminal node if it is determined that the non-terminal does not exist. 5. The display method according to claim 4, wherein the tree structure includes a data structure of a computer system. 6. The display method according to claim 5, wherein the data structure of the computer system includes a directory tree of a Net Ware (registered trademark) directory service. 7. A storage medium in which an information processing apparatus readablely stores a program for displaying elements on each node in a set having a tree structure, including non-terminal nodes that may have lower nodes. In the above, the program, when displaying an element located on a lower node of the non-terminal node, a search module for searching the lower node of the non-terminal node with reference to the tree structure, the search result A determination module for determining whether or not a lower node exists in the non-terminal node based on the above, and when it is determined that the lower node exists in the non-terminal node, a determination is made on a lower node of the non-terminal node. Is displayed, and if it is determined that the lower node does not exist in the non-terminal node, the lower node of the non-terminal node exists. And a control module for controlling to display a message indicating that there is no storage medium. 8. The storage medium according to claim 7, wherein said tree structure includes a data structure of a computer system. 9. The storage medium according to claim 8, wherein the data structure of the computer system includes a directory tree of Net Ware (registered trademark) directory service.