JP4802949B2 - Tree structure display program, tree structure display device, and tree structure display method - Google Patents

Description

  The present invention relates to a tree structure display program, a tree structure display device, and a tree structure display method.

  Conventionally, when storing a file in a storage device such as an HDD (Hard Disk Drive) connected to a computer, the user is hierarchically related based on the file type, content, etc. using the functions of the file management system. Categorize and save files in the specified directory

  Information elements held and managed by the storage device can be displayed on the screen by a function of an OS (Operating System) file management system or the like. When a large amount of information elements are stored in the storage device, all items cannot be displayed simultaneously on one screen. Therefore, if the item is a folder, closing that folder hides the folders below that folder called children or grandchildren and displays more information within the limited screen display area. A function that can be used is provided.

  For example, Patent Document 1 discloses a technique for displaying items having a hierarchical relationship in a tree structure so that the hierarchical relationship can be grasped. Further, as a known tool, there is an explorer provided as standard in Microsoft Windows (registered trademark).

  In this way, a technique for displaying a set of items having a hierarchical relationship on a screen in a tree structure allows the user to specify items to be displayed and items not to be displayed by switching whether to expand each item. The item once expanded remains in an expanded state unless the user explicitly instructs “folding of the expanded tree structure”. For this reason, when working with various hierarchical items for a long time, the number of expanded items increases as the work progresses, making it difficult to grasp the hierarchical structure of the user.

Conventionally, there is, for example, Patent Document 2 as a technique that employs simplification of a display tree. This technique is a technique for constructing a partial hierarchical structure. That is, a partial tree consisting only of elements designated by the user is created and displayed. In particular, even when the hierarchy is deep, elements in the intermediate hierarchy can be omitted and displayed, and a tree including necessary elements can be displayed very compactly. By deleting unnecessary hierarchies in advance, the user's hierarchical structure can be easily understood to some extent.
Japanese Patent Laid-Open No. 01-156843 Japanese Patent Laid-Open No. 11-45197

  An object is to automatically fold unnecessary hierarchical items from hierarchical items expanded and displayed in a tree structure, hide a complicated hierarchical structure, and make it easy for a user to grasp the hierarchical structure.

  The tree structure display program according to the invention of claim 1 is a computer program for determining whether or not to start folding of a tree structure in which hierarchical items in a hierarchical relationship are expanded, and the folding start determination. When it is determined that the processing unit starts to fold the tree structure, the folding target acquisition processing unit that acquires and folds the hierarchical item to be folded and the folding target acquisition processing unit acquires the folding target hierarchical item. When folding is started, it is made to function as folding end determination processing means for determining whether or not to end the folding.

  According to a second aspect of the present invention, the tree structure display program according to the first aspect of the invention is characterized in that the folding start determination processing means determines whether or not to start the folding based on the number of expanded hierarchical items. Is.

  A tree structure display program according to a third aspect of the present invention is the tree structure display program according to the first aspect, wherein the folding start determination processing means determines whether or not to start the folding based on the hierarchy depth of the expanded hierarchy item. Is to judge.

  The tree structure display program according to a fourth aspect of the present invention provides the tree structure display program according to the first aspect, wherein the folding start determination processing means determines whether or not to start the folding based on the last access time of the expanded hierarchy item. Judgment.

  According to a fifth aspect of the present invention, there is provided a tree structure display program according to the first aspect, wherein the folding start determination processing means determines whether or not to start the folding based on a user instruction.

  The tree structure display program according to a sixth aspect of the present invention is the tree structure display program according to the first aspect, wherein the folding target acquisition processing means acquires the hierarchical item to be folded based on the last access time of the expanded hierarchical item. Is.

  A tree structure display program according to a seventh aspect of the present invention is the tree structure display program according to the first aspect, wherein the folding target acquisition processing means acquires the hierarchical item to be folded based on the access frequency of the expanded hierarchical item. It is.

  The tree structure display program according to an invention of claim 8 is the tree structure display program according to claim 1, wherein the folding target acquisition processing means acquires the hierarchical item to be folded based on the depth of the expanded hierarchical item. To do.

  The tree structure display program according to the invention of claim 9 is the tree structure display program according to claim 1, wherein the folding target acquisition processing means is based on the number of hierarchical items corresponding to the child of the hierarchical relationship for each expanded hierarchical item. The hierarchical item to be collapsed is acquired.

  The tree structure display program according to a tenth aspect of the present invention is the tree structure display program according to the first aspect, wherein the folding end determination processing means determines whether or not to end the folding based on the number of expanded hierarchical items. To do.

  According to an eleventh aspect of the present invention, in the tree structure display program according to the first aspect, the folding end determination processing means determines whether or not to end the folding based on the hierarchy depth of the expanded hierarchy item. It is a judgment.

  A tree structure display program according to a twelfth aspect of the present invention is the tree structure display program according to the first aspect, wherein the folding end determination processing means determines whether or not to end the folding based on the last access time of the expanded hierarchical item. Is to judge.

  According to a thirteenth aspect of the present invention, in the first aspect of the invention, the folding end determination processing means determines whether or not to end the folding based on a user instruction.

  A tree structure display device according to the invention of claim 14 is a tree structure display device that displays hierarchical items having a hierarchical relationship in a tree structure, and determines whether or not to start the folding of the tree structure. When the folding start determination processing unit determines to start folding the tree structure, the folding target acquisition processing unit that acquires and folds the hierarchical item to be folded and the folding target acquisition processing unit A folding end determination processing unit for determining whether or not to end the folding when the hierarchical item is acquired and the folding is started is provided.

  A tree structure display method according to the invention of claim 15 is a tree structure display method in a tree structure display device comprising a start determination processing unit, an object acquisition processing unit, and an end determination processing unit, wherein the start determination processing unit includes: Folding start determination processing step for determining whether or not to start folding the tree structure, and when the target acquisition processing unit determines to start folding the tree structure in the folding start determination processing step, the folding target When the folding target acquisition processing step for acquiring and folding the hierarchical item and the end determination processing unit start to acquire the folding target hierarchical item and perform folding in the folding target acquisition processing step, A folding end determination processing step for determining whether or not to end folding; It is.

  According to the first aspect of the present invention, unnecessary hierarchical items can be automatically folded from the hierarchical items expanded and displayed in a tree structure, the complicated hierarchical structure can be hidden, and the user's hierarchical structure can be easily understood.

  According to the invention of claim 2, the display width in the vertical direction of the hierarchical structure can be kept constant, which is particularly effective when it is desired to limit the display width in the vertical direction.

  According to the invention of claim 3, the horizontal display width of the hierarchical structure can be kept constant, which is particularly effective when it is desired to limit the horizontal display width.

  According to the invention of claim 4, since the determination is based on time, the folding process can be automatically executed even if the user does not operate anything on the hierarchy.

  According to the invention of claim 5, the folding process can be executed only when the user wants to perform folding.

  According to the sixth aspect of the present invention, an item that has not been accessed for a long time can be set as a folding target, which is particularly effective when working in various hierarchical structures for a long time.

  According to the seventh aspect of the present invention, items with a small number of accesses can be folded, which is particularly effective when working in various hierarchical structures for a long time.

  According to the eighth aspect of the present invention, it is possible to continue to display the abstract upper hierarchical items and to hide the specific hierarchical structure.

  According to the invention of claim 9, a hierarchical item having many children can be a folding target, and a large number of display areas can be secured at a time.

  According to the invention of claim 10, since the folding process is continued until the vertical display width of the hierarchical structure becomes constant, this is particularly effective when it is desired to limit the vertical display width.

  According to the invention of claim 11, since the folding process is continued until the horizontal display width of the hierarchical structure becomes constant, this is particularly effective when it is desired to limit the horizontal display width.

  According to the twelfth aspect of the present invention, an unnecessary hierarchical structure that has not been accessed for a long time can be hidden.

  According to the invention of claim 13, the folding process can be executed until the tree structure required by the user is obtained.

  According to the fourteenth aspect of the present invention, unnecessary hierarchical items are automatically folded from the hierarchical items expanded and displayed in a tree structure, the complicated hierarchical structure is hidden, and the user's hierarchical structure can be easily understood.

  According to the fifteenth aspect of the present invention, unnecessary hierarchical items are automatically folded from the hierarchical items expanded and displayed in a tree structure, the complicated hierarchical structure is hidden, and the user's hierarchical structure can be easily understood.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a hardware configuration of a computer 100 constituting the tree structure display device. The computer 100 is connected to a CPU (Central Processing Unit) 101 via a system bus 102, a ROM (Read Only Memory) 103, a RAM (Random Access Memory) 104, an HDD (Hard Disk Drive) controller 105, The input / output controller 106 is connected.

  An HDD 107 is connected to the HDD controller 105. The input / output controller 106 is connected to a mouse 108, a keyboard 109, and a display 110 as user interfaces. The CPU 101 performs various processes using the RAM 104 as a work area according to a program stored in the ROM 103 or the HDD 107.

  FIG. 2 shows a functional block configuration related to the tree structure display in the computer 100. That is, the computer 100 includes a storage unit 111, a tree structure display control unit 112, a folding start determination processing unit 121, a folding target acquisition processing unit 122, a folding end determination processing unit 123, an item number counting unit 131, It has an item access time acquisition unit 132, an item access frequency acquisition unit 133, an item depth acquisition unit 134, an item number total acquisition unit 135, and a folding instruction acquisition unit 136.

  The storage unit 111 stores information on each item (attribute information including a name and the like) and tree structure information representing a hierarchical relationship between the items. The tree structure display control unit 112 constitutes a user interface portion that displays the tree structure. It is “input” that the user performs an operation on the hierarchy with respect to the control unit 112, and the display result of the tree structure by the control unit 112 is “output”.

  The folding start determination processing unit 121, the folding target acquisition processing unit 122, and the folding end determination processing unit 123 are functional blocks for folding processing. Hereinafter, each processing unit will be described.

(A) Folding start determination processing The folding start determination processing unit 121 determines whether or not to start folding of the expanded tree structure. This determination processing unit 121 is based on any one of (a1) display item total number, (a2) hierarchy depth, (a3) item last access time, and (a4) user instruction selected by the user. Then, it is determined whether to start folding. Each method will be described.

(A1) Total number of display items In the method based on the total number of display items, the number of display items in each layer is counted, and it is determined that folding starts when the total number of display items exceeds a certain threshold. According to this method, the vertical display width of the hierarchical display can be kept constant, and thus is particularly effective when it is desired to limit the vertical display width. In order to enable this method, the computer 100 includes the above-described item number counting unit 131 that counts the number of display items in each layer.

(A2) Hierarchy depth In the hierarchy depth method, the depth of each expanded hierarchy item is examined, and if there is an item whose depth is greater than a certain threshold, it is determined that folding starts. According to this method, the display width in the horizontal direction (depth direction) of the hierarchical display can be kept constant, and is therefore particularly effective when it is desired to limit the display width in the horizontal direction. In order to enable this method, the computer 100 has the above-described item depth acquisition unit 134 that checks the depth of hierarchical items.

(A3) Last access time of items In the method based on the last access time of items, the last access time of each hierarchical item is checked, and when there is a hierarchical item older than a certain threshold, it is determined that folding starts. Here, the access time may be determined by “hour / minute / second”, “hour / minute”, or only “hour”. According to this method, since the determination is based on time, there is an advantage that the folding process can be automatically executed even if the user does not perform any operation on the hierarchy. In order to enable this method, the computer 100 includes the item access time acquisition unit 132 that acquires the last access time of each hierarchical item.

(A4) User instruction In the method based on the user instruction, when the user explicitly instructs the start of folding, it is determined that folding starts. According to this method, there is an advantage that folding processing can be executed only when the user wants to perform folding. In order to perform this method, the computer 100 includes the above-described folding instruction acquisition unit 136 that acquires an instruction from the user.

(B) Folding target acquisition processing unit When the folding target acquisition processing unit 122 determines to start folding of the tree structure expanded by the folding start determination processing unit 121, the folding target acquisition processing unit 122 acquires the hierarchical item to be folded and executes the folding. To do. The acquisition processing unit 122 folds based on any of the (b1) item last access time, (b2) access frequency, (b3) hierarchy depth, and (b4) the total number of children selected by the user. Get the target. Each method will be described.

(B1) Last access time of items In the method based on the last access time of items, the last access time of each hierarchical item is acquired, and the access time is given priority from the oldest access time. This method is based on the idea that an item that has not been accessed for a long time is unlikely to be used by a user, and is particularly effective when working in various hierarchical structures for a long time. In order to enable this method, the computer 100 includes the item access time acquisition unit 132 that acquires the last access time of each hierarchical item.

(B2) Access frequency In the access frequency method, the access frequency of each hierarchical item is acquired, and priority is given to the items to be collapsed from those with the fewest access numbers. This method is based on the idea that items with a smaller number of accesses are less likely to be used by users, and is particularly effective when working in various hierarchical structures for a long time. In order to enable this method, the computer 100 has the item access frequency acquisition unit 133 described above that acquires the access frequency of each hierarchical item. Note that the number of accesses is, for example, the number of accesses on a daily basis, or the number of accesses since the explorer is opened in the case of the above-described explorer. In addition, the number of accesses may be counted for each user.

(B3) Hierarchy depth In the hierarchy depth method, the depth of the expanded hierarchy item is examined, and the deeper hierarchy item is prioritized as a folding target. This method has an advantage that a specific hierarchical structure can be concealed by continuously displaying the abstract hierarchical items. In order to enable this method, the computer 100 has the above-described item depth acquisition unit 134 that checks the depth of hierarchical items.

(B4) Total number of children In the method based on the total number of children, the total number of children of the expanded hierarchical item is checked, and hierarchical items having many children are given priority for folding. Here, the hierarchy item is only the item at the end or the entire item. Hierarchical items with many children consume a lot of the vertical display width of the hierarchical display. This method has an advantage that a large number of display areas can be secured at one time. In order to enable this method, the computer 100 has the item number total acquisition unit 135 described above.

(C) Folding end determination processing unit The folding end determination processing unit 123 determines whether or not to end the folding when the folding target acquisition processing unit 122 starts to acquire a folding target hierarchical item and perform folding. Judging. The determination processing unit 123 determines whether (c1) the total number of display items, (c2) the depth of the hierarchy, (c3) the last access time of the items, or (c4) the user's instruction selected by the user. Then, it is determined whether or not to end the folding. Each method will be described.

(C1) Total number of display items In the method based on the total number of display items, the number of display items in each layer is counted, and when the total number of display items falls below a certain threshold, it is determined to end. According to this method, the folding process is continued until the vertical display width of the hierarchical structure becomes constant, which is particularly effective when it is desired to limit the vertical display width. In order to enable this method, the computer 100 includes the above-described item number counting unit 131 that counts the number of display items in each layer.

(C2) Hierarchy Depth In the hierarchy depth method, the depth of each expanded hierarchy item is examined, and when there is no item deeper than a certain threshold, it is determined that folding is to end. . According to this method, the folding process is continued until the horizontal display width of the hierarchical structure becomes constant, which is particularly effective when it is desired to limit the horizontal display width. In order to enable this method, the computer 100 has the above-described item depth acquisition unit 134 that checks the depth of hierarchical items.

(C3) Last access time of items In the method based on the last access time of items, the last access time of each hierarchical item is checked, and when there are no hierarchical items older than a certain threshold, it is determined that folding is finished. According to this method, an unnecessary hierarchical structure that has not been accessed for a long time can be hidden. In order to enable this method, the computer 100 includes the item access time acquisition unit 132 that acquires the last access time of each hierarchical item.

(C4) User instruction In the method based on the user instruction, when the user explicitly instructs the end of folding, it is determined that the folding ends. According to this method, the folding process can be executed until the tree structure required by the user is obtained. In order to perform this method, the computer 100 includes the above-described folding instruction acquisition unit 136 that acquires an instruction from the user.

  The operation of the folding process in the computer 100 having the functional blocks shown in FIG. 2 will be described with reference to the flowchart of FIG. The operation of the folding process according to the flowchart of FIG. 3 is periodically executed in a state where items of each hierarchy are displayed in a tree structure.

  First, folding processing is started in step ST1. In step ST2, it is determined whether or not folding is started. As described above, this determination is made based on (a1) the total number of display items, (a2) the depth of the hierarchy, (a3) the last access time of the items, or (a4) the user's instruction. When it is determined not to start folding, the process immediately proceeds to step ST6, and the folding process is terminated. On the other hand, when it is determined to start folding, the process proceeds to step ST3.

  In this step ST3, it is determined whether or not there is a folding target. As described above, this determination is made based on (b1) item last access time, (b2) access frequency, (b3) hierarchy depth, or (b4) total number of children. If there is a folding target, the hierarchical item to be folded is folded in step ST4. If there is no folding target in step ST3, the process immediately proceeds to step ST5.

  In step ST5, it is determined whether or not folding is to be ended. As described above, this determination is made based on (c1) total number of display items, (c2) depth of hierarchy, (c3) last access time of items, or (c4) user instruction. When it is determined that the folding is not finished, the process returns to step ST3, and the acquisition of the folding target and the process of folding the folding target are repeated as described above. On the other hand, when it is determined that the folding is finished, the folding process is finished in step ST6.

Next, a specific example of the folding process described above will be described.
Here, an example in which the explorer in Windows (registered trademark) of Microsoft Corporation is used as a model case and the directory structure in the file management system is displayed in a tree structure will be described.

  Here, a setting tool that allows the user to set folding is provided. Although the details of the setting tool are omitted, it is assumed that the “folding execution criterion”, “folding target item”, and “folding order” can be set in this setting tool. It is assumed that the user has made settings using this setting tool as shown in FIG.

  That is, “when vertical scroll bar is displayed” is set as “folding execution criterion”, “more than 10 minutes have passed since last access time” is set as “folding target item”, and “last access” is set as “folding order” “In order of oldest time” is set.

  Based on this setting result, “(a1) total number of display items” is selected as the determination method of folding start, “(b1) last access time of items” is selected as the acquisition method of folding targets, and “ (C1) Total number of display items ”is selected.

  Moreover, the threshold value in each method is set as follows.

  The threshold value used in “total number of display items”, which is a method for determining folding start and folding end, is set as follows. When expanding the tree structure, if the number of expanded items increases, a scroll bar is displayed in the window displaying the hierarchy. As a result, the user needs to operate the scroll bar to access the hierarchical items. Therefore, the maximum number of display items in which the scroll bar is not displayed is set as a threshold value of “total number of display items”. Here, this threshold value is assumed to be “9”.

  Further, the threshold value used in the “item last access time” which is the determination method of the folding target is 10 minutes from the setting result. In other words, among the expanded items having a difference between the last access time and the current time of 10 minutes or more, the items with the oldest access time are subject to folding.

  The operation of the folding process when the user performs the setting as shown in FIG. 4 will be described with reference to the flowchart of FIG.

  First, when the folding process is started in step ST11, the process proceeds to step ST12, and the process proceeds to a folding start determination process. That is, in this step ST12, it is determined whether or not the total number of displayed hierarchy items is 9 or more. When the total number of hierarchical items is less than 9, it is determined that folding is not started, and the process immediately proceeds to step ST16 and the folding process is terminated.

  On the other hand, when the total number of hierarchy items is 9 or more, it is determined that folding is started, and the process proceeds to step ST13 to move to the acquisition process of the hierarchy item to be folded. That is, in this step ST13, it is determined whether or not there is an item for which 10 minutes or more have elapsed since the last access time. If there is an item for which 10 minutes or more have passed since the last access time, the process proceeds to step ST14, and the item with the oldest last access time is folded.

  Next, it progresses to step ST15 and moves to the determination process of folding end. If there is no item that has passed 10 minutes or more from the last access time in step ST13, the process immediately proceeds to step ST15. In this step ST15, it is determined whether or not the total number of displayed hierarchy items is 9 or more. When the total number of hierarchical items is 9 or more, the process returns to step ST13, and among the items that have passed 10 minutes or more from the last access time, the item having the oldest last access time is acquired as a folding target, and the item is lowered. repeat.

  When the total number of hierarchical items is less than 9 in step ST15, it is determined that folding is to be ended, the process proceeds to step ST16, and the folding process is ended.

  By performing the folding process according to the flowchart shown in FIG. 5, the hierarchical items expanded and displayed in a tree structure are automatically folded so that the total number of displayed hierarchical items is always less than 9.

  Next, a change in display of the tree structure when the folding process according to the flowchart shown in FIG. 5 is performed will be described.

  First, as an initial state of a hierarchy, consider a state where hierarchy items A, B, and F exist as shown in FIG. In this state, since the hierarchy items B and F are not operated, the items are folded. Thereafter, assume that the hierarchical item B is expanded and the hierarchical item E is operated as shown in FIG.

  After working on the hierarchical item E, assume that the hierarchical item F is expanded and the hierarchical item H is operated as shown in FIG. Since the number of hierarchical items expanded in this state is 9 (threshold) in total from A to I, it is determined that folding is started by the folding start determination process. Furthermore, when 10 minutes (threshold) or more have passed since the last access time of the hierarchical items C, D, and E, these hierarchical items C, D, and E are acquired as the hierarchical items to be folded by the folding target acquisition process. The As a result, as shown in FIG. 9, the items below the hierarchy item B that are highly likely not to be operated are folded by the folding execution process. In this way, only the necessary hierarchical items remain, and it becomes easy to grasp the hierarchical items.

  Thereafter, when expanding the hierarchy item I, as shown in FIG. 9, a space is created below the hierarchy, so that the user does not need to operate the scroll bar. FIG. 10 shows a display example when folding is not performed as described above. A scroll bar is displayed, and the user needs to operate the scroll bar.

  In the above embodiment, the number of hierarchical items is reduced for the sake of simplicity of explanation. However, the present invention is similarly applied to the case of handling a more complicated tree structure, and the same effect can be obtained. Of course, it can be obtained.

  The present invention automatically collapses unnecessary hierarchical items from hierarchical items expanded and displayed in a tree structure, hides a complicated hierarchical structure, makes it easy to grasp the hierarchical structure of the user, and has items in a hierarchical relationship. The present invention can be applied to a tree structure display device that displays a set of screens in a tree structure.

It is a block diagram which shows the hardware constitutions of the computer which comprises a tree structure display apparatus. It is a figure which shows the functional block structure which concerns on a tree structure display. It is a flowchart which shows the procedure of a folding process. It is a figure which shows the user's folding setting example by a setting tool. It is a flowchart which shows the procedure of a folding process (specific example). It is a figure which shows the display change example (1/4) of a tree structure. It is a figure which shows the display change example (2/4) of a tree structure. It is a figure which shows the example of a display change (3/4) of a tree structure. It is a figure which shows the example of a display change (4/4) of a tree structure. It is a figure which shows the example of a display of a tree structure (scroll bar display).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Computer (tree structure display apparatus), 101 ... CPU, 102 ... System bus, 103 ... ROM, 104 ... RAM, 105 ... HDD controller, 106 ... Input / output Controller 107 107 HDD 108 Mouse 109 Keyboard 110 Display 111 Storage unit 112 Tree display control unit 121 Folding start determination Processing unit 122... Folding target acquisition processing unit 123. Folding end determination processing unit 131 131 Item count unit 132 132 Item access time acquisition unit 133 133 Item access frequency acquisition 134, item depth acquisition unit, 135 ... item number total acquisition unit, 136 ... folding instruction acquisition unit

Claims (6)

Computer
Whether to initiate folding of the tree structure hierarchy item is expanded in the hierarchy relationship, based on the depth of the expanded hierarchy item hierarchy folding start judgment processing means to determine,
When it is determined that starts the folding of the tree structure by the folding initiation determination processing unit, based on the depth of the expanded hierarchy item hierarchy folded target acquisition processing hand stage of folding to obtain the hierarchical item folding target ,
When the folding target acquisition processing means starts acquiring the folding target hierarchical item and performing folding, whether or not to end the folding is determined based on the hierarchical depth of the expanded hierarchical item. Te, folding the end determination processing means for determining,
Tree structure display program for functioning as a. Computer
Whether to initiate folding of the tree structure hierarchy item is expanded in the hierarchy relationship, based on the depth of the expanded hierarchy item hierarchy folding start judgment processing means to determine,
When the folding start determination processing unit determines that the tree structure is to be folded, the hierarchical item to be collapsed is acquired based on the number of hierarchical items corresponding to the child of the hierarchical relationship for each expanded hierarchical item. folding target acquisition process hand-stage folding Te,
When the folding target acquisition processing means starts acquiring the folding target hierarchical item and performing folding, whether or not to end the folding is determined based on the hierarchical depth of the expanded hierarchical item. Te, folding the end determination processing means for determining,
Tree structure display program for functioning as a. In a tree structure display device that displays hierarchical items in a hierarchical relationship in a tree structure,
A folding start determination processing unit that determines whether or not to start folding of the tree structure based on the depth of the hierarchy of the expanded hierarchy item ;
When it is determined that the folding start determination processing unit starts to fold the tree structure, a folding target acquisition processing unit that acquires and folds the hierarchical item to be folded based on the depth of the expanded hierarchical item, ,
When the folding target acquisition processing unit starts to acquire the folding target hierarchical item and perform the folding, whether or not to end the folding is determined based on the hierarchical depth of the expanded hierarchical item. A tree structure display device comprising: a folding end determination processing unit for determining. In a tree structure display device that displays hierarchical items in a hierarchical relationship in a tree structure,
A folding start determination processing unit that determines whether or not to start folding of the tree structure based on the depth of the hierarchy of the expanded hierarchy item ;
When it is determined that the folding start determination processing unit starts to fold the tree structure, the hierarchical item to be collapsed is acquired based on the number of hierarchical items corresponding to the child of the hierarchical relationship for each expanded hierarchical item. Folding target acquisition processing unit,
When the folding target acquisition processing unit starts to acquire the folding target hierarchical item and perform the folding, whether or not to end the folding is determined based on the hierarchical depth of the expanded hierarchical item. A tree structure display device comprising: a folding end determination processing unit for determining. A tree structure display method in a tree structure display device including a start determination processing unit, a target acquisition processing unit, and an end determination processing unit,
A folding start determination processing step in which the start determination processing unit determines whether or not to start folding of the tree structure based on a hierarchy depth of the expanded hierarchy item ;
When the target acquisition processing unit determines that the folding of the tree structure is to be started in the folding start determination processing step, the target acquisition processing unit acquires a hierarchical item to be folded based on the hierarchy depth of the expanded hierarchical item. Folding target acquisition processing step for folding;
When the end determination processing unit starts to acquire the folding target hierarchical item and perform the folding in the folding target acquisition processing step, it determines whether or not to end the folding of the expanded hierarchical item. based on the depth of the hierarchical tree structure display method comprising <br/> folding termination determination processing step of determining. A tree structure display method in a tree structure display device including a start determination processing unit, a target acquisition processing unit, and an end determination processing unit,
A folding start determination processing step in which the start determination processing unit determines whether or not to start folding of the tree structure based on a hierarchy depth of the expanded hierarchy item ;
When it is determined that the target acquisition processing unit starts folding the tree structure in the folding start determination processing step, the folding is performed based on the number of hierarchical items corresponding to the child of the hierarchical relationship for each expanded hierarchical item. Folding target acquisition processing step to acquire and collapse the target hierarchy item,
When the end determination processing unit starts to acquire the folding target hierarchical item and perform the folding in the folding target acquisition processing step, it determines whether or not to end the folding of the expanded hierarchical item. A tree structure display method comprising: a folding end determination processing step for determining based on the depth of a hierarchy .