JP2006301923A - File information list display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a file information list display device that can save memory while suppressing delay in the display speed of displaying a list of file information on a screen. <P>SOLUTION: The file information list display device comprises a sort information extraction part 103 for sequentially extracting sort information used in rearranging directory entries of files stored in an external storage device 101, a sort information storage part 104 for storing the sort information extracted by the sort information extraction part 103, a sort information comparison part 105 for comparing sizes of the sort information stored in the sort information storage part 104, an order table creation part 106 for creating an order table of the directory entries according to the sizes compared by the sort information comparison part 105, and a file information list display part 110 for displaying the directory entries stored in the external storage device 101 on a screen as a list of file information according to the order table created by the order table creation part 106. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a file information list display device for displaying a list of file information stored in a storage device on a screen.

  As a conventional file information list display device, as shown in FIG. 5, a file, a directory entry representing its attribute, etc., a directory representing a file storage location, and the like are stored in an external storage device 101 such as a hard disk. A directory entry acquisition unit 102 that reads and acquires all directory entries from the external storage device 101, and all directory entries acquired by the directory entry acquisition unit 102 are stored in a directory entry storage unit 109 configured by an internal memory. The directory entry storage unit 108 to be stored, the sort unit 401 for rearranging the directory entries stored in the directory entry storage unit 109 according to a predetermined algorithm, and the directory entry sorted by the sort unit 401 A sorted directory entry storage unit 402 for storing files, and a file information list display unit 110 for displaying the directory entries stored in the sorted directory entry storage unit 402 on the screen of the display device 111 as a list of file information. Those having a configuration are known.

  An example of directory entry information stored in the external storage device 101 is shown in FIG. The directory entry information shown in FIG. 2A represents a directory entry related to each file, and includes a file name, an extension, an update date and time, and the like.

  Furthermore, in the conventional file information list display device shown in FIG. 5, the content displayed on the screen of the display device 111 is changed by scrolling the content of the file information displayed on the screen according to the user's operation. A screen switching detection unit 112 that detects switching, and when the screen switching detection unit 112 detects, the directory information of the quantity that the file information list display unit 110 will display on the screen from now on is sorted as a list of file information. It is acquired from the entry storage unit 402 and displayed.

  This type of conventional file information list display device sorts document numbers corresponding to directory entries in accordance with user operations, creates document position information representing the sorted document numbers, and sorts directory entries The file information list display unit 110, which is stored in the storage unit 402, acquires a plurality of directory entries from the directory entry storage unit 109 according to the document position information stored in the sorted directory entry storage unit 402, and the acquired directory entries are stored as files. One that increases the display speed for displaying a list of file information by displaying it on the screen of the display device 111 as a list of information is known (see, for example, Patent Document 1).

Also, as this type of conventional file information list display device, a device that saves internal main memory by storing rearranged directory entries in an external storage device 101 such as a hard disk is known. (For example, refer to Patent Document 2).
JP 2001-306617 A JP-A-62-121532

  However, in the file information list display device described in Patent Document 1, all directory entries are stored in the internal memory, so that the internal capacity of the external storage device 101 such as a hard disk in recent years increases in capacity. In particular, there is a problem that it is very difficult to apply to a device such as a mobile phone that cannot mount many memories.

  In the file information list display device described in Patent Document 2, the sorted directory entries are stored in the external storage device 101 such as a hard disk having a low reading speed, so that the display speed of the sort information is also slow. Furthermore, when the status of the external storage device 101 is write-protected or when the capacity of the external storage device 101 is full, the sorted directory entry cannot be written. There was a problem that it could not be displayed.

  The present invention has been made to solve the above-described conventional problems, and a file information list display capable of saving memory by suppressing a delay in display speed when displaying a list of file information on a screen. An object is to provide an apparatus.

  The file information list display device of the present invention is extracted by the sort information extraction unit that sequentially extracts the sort information for rearranging the directory entries related to the files stored in the storage device, and the sort information extraction unit. A sort information storage unit that stores sort information, a sort information comparison unit that compares the size of each sort information stored by the sort information storage unit, and a directory entry according to the size compared by the sort information comparison unit A rank table creating unit for creating a rank table; and a file information list display unit for displaying on the screen a directory entry stored in the storage device according to the rank table created by the rank table creating unit as a list of file information. It has the composition to provide.

  With this configuration, the directory entry stored in the storage device according to the order table is displayed on the screen as a list of file information, so that the order table is not stored in the external storage device and the directory entry is not stored in the internal memory. Thus, memory capacity can be saved by suppressing delay in display speed when displaying a list of file information on the screen.

  The file information list display device of the present invention includes a directory entry acquisition unit that acquires in advance a predetermined number of directory entries from the storage device according to the rank table created by the rank table creation unit, and the directory entry acquisition unit A list of the file information is displayed on the screen from the acquired predetermined number of directory entries.

  With this configuration, since the list of file information is displayed on the screen from a predetermined number of directory entries acquired in advance from the storage device, the display speed when displaying the list of file information on the screen can be improved.

  The file information list display device of the present invention further includes a screen switching detection unit that detects that the contents of the list displayed on the screen are switched, and the screen switching detection unit detects that the contents of the list are switched. Then, the file information acquisition unit has a configuration in which the file information list display unit acquires in advance from the storage device a quantity of directory entries to be displayed on the screen.

  With this configuration, when it is detected that the contents of the list of file information displayed on the screen are switched, a directory entry of the quantity to be displayed on the screen is acquired in advance. It is possible to display at a high speed without causing the user to feel the delay time for doing so.

  As described above, the present invention provides a file information list display device that can suppress a delay in display speed when displaying a list of file information on a screen and save memory capacity.

  Hereinafter, a file information list display device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a file information list display device according to an embodiment of the present invention. The file information list display device shown in FIG. 1 is mounted on a portable terminal or the like having a processor and a memory, and stores a directory entry that represents a file, file attributes, and the like, and a hard disk that stores a directory structure that represents a file storage destination. The directory entry acquisition unit 102 that acquires directory entries from the external storage device 101, the storage unit 20 that includes a memory, the directory entry storage unit 108 that stores the directory entries in the storage unit 20, and rearranges the directory entries. A file list sorting unit 10 and a display control unit 30 that controls display of information are provided.

  Here, an example of the directory entry information stored in the external storage device 101 is shown in FIG. The directory entry information shown in FIG. 2A represents a directory entry related to each file. The file name, the extension, and the update date / time, the type representing the file or directory, and whether or not the file is read-only. It is comprised by the type showing.

  The file list sorting unit 10 includes a sort information extracting unit 103 that sequentially extracts sort information for rearranging the directory entries stored in the external storage device 101, and sort information that compares the size of the extracted sort information. The comparison unit 105 includes a rank table creation unit 106 that creates a rank table of directory entries according to the size compared by the sort information comparison unit 105.

  The sort information includes information (hereinafter referred to as a sort key) that is a target for rearranging the directory entries. In addition, a file name or an update date is used as the sort key.

  The storage unit 20 includes a sort information storage unit 104 that stores sort information, a rank table storage unit 107 that stores a rank table of directory entries created by the rank table creation unit 106, and a directory entry storage unit that stores directory entry information. 109.

  Here, an example of the sort information stored in the sort information storage unit 104 is shown in FIG. The sort information shown in FIG. 2B is composed of the directory entry storage order and the sort key.

  The sort information storage unit 104 stores two sort information, one is stored in the previous entry storage area, and the other is stored in the subsequent entry storage area. The previous entry storage area and the subsequent entry storage area are used for rearrangement.

  FIG. 2C shows an example of a directory entry ranking table (hereinafter referred to as a sort table) stored in the ranking table storage unit 107. The sort table shown in FIG. 2C includes a storage number indicating the order in which directory entries are stored in the external storage device 101, and a display order when displaying file information.

  The display control unit 30 detects that the display device 111 having a screen, the file information list display unit 110 that displays a list of file information on the screen of the display device 111, and the content displayed on the screen of the display device 111 are switched. And a screen switching detection unit 112.

  The sort information extraction unit 103, the sort information comparison unit 105, the rank table creation unit 106, the directory entry acquisition unit 102, and the directory entry storage unit 108 that constitute the file list sort unit 10 are programs executed by the processor. Module. Further, the file information list display unit 110 and the screen switching detection unit 112 constituting the display control unit 30 may also be implemented by a program module.

  The operation of the file information list display device according to the embodiment of the present invention configured as described above will be described below with reference to the drawings. 3 and 4 are flowcharts for explaining the operation of the file information list display device according to the embodiment of the present invention. Note that the algorithm related to the rearrangement of directory entries in this flowchart conforms to the insertion sort.

  First, when a display of a list of file information is requested by a user operation, the directory entry acquisition unit 102 acquires a directory entry of the target storage number from the external storage device 101, and the sort information extraction unit 103 The sort information is extracted from the directory entry acquired by the directory entry acquisition unit 102, and the extracted sort information is stored in the post-entry storage area (S1).

  Note that in the first step S1, the directory entry acquisition unit 102 acquires the first and second directory entries of the storage number, and the sort information extraction unit 103 corresponds to the first and second directory entries. The sort information is stored in the previous entry storage area and the subsequent entry storage area, and the order table creation unit 106 creates a temporary sort table with the storage numbers included in the respective sort information as the first and last display orders. To do.

  In the embodiment of the present invention, the target storage numbers are determined in ascending order. For example, in the second step S1, the third is the target storage number, and in the third step S1, the fourth is the target. The storage number becomes.

  Next, the sort information comparison unit 105 sorts sort information stored in the previous entry storage area (hereinafter referred to as the previous entry) and sort information stored in the subsequent entry storage area (hereinafter referred to as the subsequent entry). ) Is compared (S2). For example, if the sort key is a file name, the numbers included in the respective file names and the alphabetical order are compared.

  When the subsequent entry is larger than the previous entry, the rank table creating unit 106 inserts the storage number corresponding to the subsequent entry in the display order that is one higher than the display order corresponding to the previous entry based on the display order of the sort table. The sort table is temporarily determined (S3).

  Next, the order table creation unit 106 stores the sort information corresponding to the last display order of the sort table in the previous entry storage area (S4).

  Next, the directory entry acquisition unit 102 determines whether all directory entries have been acquired from the external storage device 101 (S5). If not all directory entries have been acquired, the operation proceeds to step S1. If all directory entries have been acquired, the sort table is stored in the rank table storage unit 107, and the detailed operation is shown in FIG. .

  On the other hand, when the previous entry is larger than the subsequent entry, the rank table creation unit 106 determines whether there is a display rank that is one lower than the display rank corresponding to the previous entry based on the display rank of the sort table ( S6).

  When there is a display order that is one lower than the display order corresponding to the previous entry, the rank table creation unit 106 stores the sort information corresponding to the display order that is one lower than the display order corresponding to the previous entry in the previous entry storage area. (S7). If there is no display order that is one lower than the display order corresponding to the previous entry, the order table creation unit 106 temporarily inserts the storage number corresponding to the subsequent entry into the first display order and temporarily sorts the sort table. Determine (S8).

  Next, as shown in FIG. 4, the directory entry acquisition unit 102 displays a list of file information on the screen of the display device 111 based on the sort table stored in the rank table storage unit 107. A predetermined number of directory entries corresponding to the storage order of the sort information are acquired from the external storage device 101 in advance from the lowest order, and the directory entry storage unit 108 acquires the acquired predetermined number of directory entries from the directory entry storage unit 109. (S9).

  The predetermined quantity may be the number of directory entries that can be displayed on the screen of the display device 111. However, when screen switching is assumed, the number of directory entries for one screen and the screens before and after the screen switching are assumed. This is the number of directory entries for three screens combined with the number of directory entries.

  Further, the directory entry storage unit 108 outputs the directory entries for one screen from the display order with the smallest display order to the file information list display unit 110, and the file information list display unit 110 displays the output directory entries as a list of file information. Is displayed on the screen of the display device 111 (S10).

  Next, the screen switching detection unit 112 detects that the file information list is scrolled in accordance with the user's operation and the contents of the file information list displayed on the screen of the display device 111 are switched (S11). .

  When the screen switching detection unit 112 detects that the list of file information has been scrolled forward, the screen switching detection unit 112 acquires the directory entries for the previous screen when the screen switching is assumed from the directory entry storage unit 109 and acquires the display device 111. And when it is detected that the list of file information has been scrolled later, directory entries for the subsequent screen when the screen switching is assumed are acquired from the directory entry storage unit 109 and the screen of the display device 111 is displayed. (S12).

  In step S1, when the directory entry to be displayed on any one of the screens before and after the screen switching is assumed does not exist in the directory entry storage unit 109, the directory entry acquisition unit 102 displays it from now on. In order to make up for the directory entry to be attempted, a directory entry corresponding to the storage order of the sort information is acquired in advance from the external storage device 101 based on the sort table stored in the rank table storage unit 107.

  When the display of the file information list is terminated by the user's operation, the operation is terminated (S13).

  As described above, in the conventional file information list display device, if the number of directory entries acquired from the external storage device 101 is limited, not all directory entries are prepared, so that the directory entries cannot be rearranged. Since the file information list display device according to the embodiment of the present invention acquires directory entries from the external storage device 101 in accordance with the sort table stored in advance in the rank table storage unit 107, the memory capacity that can store the directory entries is limited. You can sort directory entries.

  Further, in order to acquire not only the number of directory entries for one screen but also three screen directory entries including the number of directory entries for the previous and subsequent screens when the screen switching is assumed, from the external storage device 101 in advance. When switching the screen, it is possible to display at high speed without causing the user to feel the delay time for acquiring the directory entry from the storage device.

  In the embodiment of the present invention, two sort information items stored in the sort information storage unit 104 are shown, but more than one may be stored. Further, although it has been described that the directory entry storage unit 109 stores directory entries for three screens, more directory entries may be stored.

  As described above, the present invention has an effect that it is possible to save memory by suppressing delay in display speed when displaying a list of file information on a screen, and a file stored in a storage device. This is useful for applications such as portable terminals that display a list of information on the screen.

The block diagram of the file information list display apparatus concerning an embodiment of the invention (A) A diagram showing an example of directory entry information (B) A diagram showing an example of sort information (C) A diagram showing an example of a directory entry ranking table The flowchart for demonstrating operation | movement of the file information list display apparatus which concerns on embodiment of this invention. The flowchart for demonstrating operation | movement of the file information list display apparatus which concerns on embodiment of this invention. Block diagram of a conventional file information list display device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 File list sort part 20 Storage part 30 Display control part 101 External storage apparatus 102 Directory entry acquisition part 103 Sort information extraction part 104 Sort information storage part 105 Sort information comparison part 106 Ranking table creation part 107 Ranking table storage part 108 Directory entry preservation | save Section 109 Directory entry storage section 110 File information list display section 111 Display device 112 Screen switching detection section 401 Sort section 402 Sorted directory entry storage section

Claims (3)

A sort information extraction unit for sequentially extracting sort information for rearranging the directory entries related to the files stored in the storage device;
A sort information storage unit for storing the sort information extracted by the sort information extraction unit;
A sort information comparison unit for comparing the size of each sort information stored by the sort information storage unit;
A rank table creation unit that creates a rank table of directory entries according to the size compared by the sort information comparison unit;
A file information list display comprising: a file information list display unit that displays a directory entry stored in the storage device as a list of file information on the screen according to the rank table created by the rank table creation unit apparatus. A directory entry acquisition unit that acquires in advance a predetermined number of directory entries from the storage device according to the rank table created by the rank table creation unit;
2. The file information list display device according to claim 1, wherein a list of the file information is displayed on the screen from a predetermined number of directory entries acquired by the directory entry acquisition unit. A screen switching detection unit for detecting that the contents of the list displayed on the screen are switched;
When the screen switching detection unit detects that the contents of the list are switched, the file information acquisition unit acquires in advance from the storage device a quantity of directory entries to be displayed on the screen by the file information list display unit. The file information list display device according to claim 2, wherein:

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