JP2844577B2 - Window display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window display device capable of changing the display size of a window displayed on a display screen. 2. Description of the Related Art As is well known, various information processing apparatuses of a multitasking and multiwindow system have been developed. When a window is generated under such a multi-window system, the window can be generated in any size. [0003] However, in the multi-window generated as described above, even if an attempt is made to start the active window application program displayed at the top of the multi-window, When the size of the active window was small, it could not be started. In addition, even if it can be started, the display may not be visible. Therefore, in such a case, it is necessary to change the size of the window, that is, to regenerate the window, and there is a problem that it takes time and effort. Further, when a large window is created, there is another problem that a large storage area of a logical screen buffer for storing display contents in the window is required. An object of the present invention is to enable a display size of a window displayed on a display screen to be automatically changed to a predetermined display size, and to immediately return to an original display state. Is to do so. According to the present invention, there is provided a display size information storing means for storing display size information relating to a display size of a window displayed on a display screen, and a method for changing the size of the window. Saving the display size information stored in the display size information storage means as original size information, and changing the window to a window of a predetermined display size based on predetermined display size information preset for the window. When the window is returned to the original display state after the window is changed to the predetermined display size,
Return display means for returning the window to the original display size and displaying the window based on the saved original size information;
It is characterized by having. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration, wherein 10 is a CRT as a display device for displaying a multi-window, and 12 is a window manager for controlling the multi-window displayed on the CRT 10. Reference numeral 14 denotes a window memory including a logical screen buffer corresponding to each window for storing display contents of each window displayed on the CRT 10. Reference numeral 16 denotes a window management table storage area for storing a window management table for managing information on each logical screen buffer and each window. 18 is the window management table storage area 16
Is a window display device that creates a screen to be displayed on the CRT 10 based on information of each window management table managed and stored in the window. Window manager 1 above
Reference numeral 2 denotes a window memory 14, a window management table storage area 16, and a window display device 18. Reference numeral 20 denotes an application program in which data to be changed is set. As the data, the window size (CRT1
Window size on 0), character size (character size displayed in the window), line pitch (pitch between lines displayed in the window), window type (whether the window can be displayed with graphics), window size Flag to reset (at the end of the application, set this flag and undo the window)
And so on. 22 is the above application program 2
According to the data passed from 0, a function to change the window size, a function to change the logical screen buffer, a function to change the character size, a function to change the line pitch, a function to change the window type, a function to change the window size This is an automatic window size converter with a function to restore the window size. Reference numeral 24 denotes a data memory for storing window information before the change. FIG . 2 shows a storage structure of information of a window management table 26 provided for each window in the window management table storage area 16. That is, the following information is stored in each window management table 26. Blw: width of display screen of CRT 10 blh: height of display screen of CRT 10 bpw: width of window bph: height of window bpx: x coordinate on display screen of CRT 10 b: y on display screen of CRT 10 Coordinates csize: size of characters in window pitch: pitch between lines in window fp: pointer to next window bp: pointer to previous window swsp: first subwindow swap: last subwindow parent: to parent window Pointer: title bar data atbp: active title bar dtbp: inactive title bar Wtp: window type The relationship of such information on the display screen 28 of the CRT 10 is as shown in FIG. FIG. 4 shows the relationship between each window management table provided for each window (winA and winB) and the relationship between them and the parent window management table for the CRT 10. In the window display device having such a configuration, the active window application of the multi-window displayed on the display screen 28 of the CRT 10 is used.
When starting the application program 20, the application
The active window is automatically converted into a size required by the application program 20 based on the data set in the application program 20. [0013] That is, as shown in (a) of FIG. 5, four Window is assumed to be displayed on the display screen of CRT 10. Here, the application program 20 is activated in the active window 30. Then, at the beginning of the application program 20, the window size management table 26 is
There is changed, the size as shown in (b) of FIG. 5, the active Windu 30 is converted. In this state, the application program 20 is executed. And
When the execution of the application program 20 is completed,
The Window management table 26 is changed again by the Windu size automatic conversion apparatus 22, as shown in FIG. 5 (c), the active Windu 30 is converted to its original size. The operation of the automatic window size converter 22 will be described in more detail. FIG. 6 shows a flowchart of the processing. First, when the application program 20 is started, data set in the application program 20, that is, data such as a window size, a character size, a line pitch, and a window type, is input to the automatic window size conversion device 22. In step S1 proceeding to S1, it is determined whether a flag for resetting the window size is set.
That is, it is checked whether or not the converted window is restored. The above flag is set in the application program 20
Is set at the end of the execution of the application program 20. Therefore, in this case, since the flag is not set, the process proceeds to step S2. In this step S2, the window information is received from the window management table 26 of the corresponding window in the window management table storage area 16, and the information is stored in the data memory 24. Then, in step S3, the window management table 26 is changed based on the data input from the application program 20. As a result, the window display device 18 displays C based on the changed window management table 26.
Since on the display screen 28 of RT10 is intended to display the Window, Window from the display as shown in FIG. 5 (a), in the Window display as shown in (b) of FIG. 5, the display screen is switched . In the operation of returning the window to the original size, a flag for returning the window size to the original size is set by the application program 20 at the end of the execution of the application program 20. Thereby, the window size automatic conversion device 22
Goes to step S4 because the flag is set in step S1. In this step S4, the data
It is checked whether there is data stored in the data memory 24. If there is data, in step S5, the window management table 26 is changed based on the data in the data memory 24. Thereafter, in step S6, the contents of the data memory 24 are erased. [0018] Thus, the window from the display as shown in FIG. 5 (b), in the Window display as shown in FIG. 5 (c), is switched display screen. In the above embodiment, only the case where the size of the active window is changed to a large size when the active window is small has been described. On the contrary, an active window which is too large is set in the application program in the same manner as described above. Small changes can be made based on the data obtained. Thus, the logical screen buffer can be used effectively. As described above, in the window display device according to the present invention, when the application program 20 of the active window in the multi-window displayed on the display screen 28 of the CRT 10 is started, the application is activated. Based on the data set in the application program 20, the active window is automatically converted into a size required by the application program 20. Therefore, when starting the application program, when the window is small, the window size is automatically increased to save the trouble of changing the window size, and when the window is too large, the automatic size is reduced. This makes it possible to effectively use the logical screen buffer by reducing the size of the window. According to the present invention, a window displayed on a display screen can be immediately changed to a predetermined display size, and after this change, When returning the window to the original display state, the window can be immediately returned to the window of the original display size and displayed based on the previously saved original size information.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of one embodiment of the present invention. FIG. 2 is a diagram showing an information storage structure of a window management table. FIG. 3 is a diagram showing a relationship of information of a window management table on a CRT display screen. [Fig. 4] Between window management tables and between them and CR
It is a figure showing the relation with the parent window management table for T. FIGS. 5A to 5C are diagrams showing actual display examples for explaining operations; FIGS. FIG. 6 is a processing flowchart of the automatic window size conversion apparatus. [Description of References ] 10 CRT, 12 Window Manager, 14 C
Window memory, 16 ... window management table storage
Area, 18: Window display device, 20: Application
Program, 22 ... window size automatic conversion device,
24 Data memory.

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-61-258289 (JP, A)                 JP-A-62-5293 (JP, A)                 JP-A-62-73291 (JP, A)                 JP-A-62-145480 (JP, A)                 JP-A-61-258290 (JP, A)                 JP-A-61-27588 (JP, A)                 JP-A-63-298442 (JP, A)                 JP-A-63-165972 (JP, A)                 "Nikkei Electronics" 1984 1               -30 (No.335) Nikkei McGraw-Hill Company                 P. 101-118

Claims (1)

(57) [Claims] Display size information storage means for storing display size information relating to the display size of a window displayed on the display screen; and when changing the size of the window, the display size information stored in the display size information storage means Size changing means for saving the original size information and changing the window to a window having a predetermined display size based on predetermined display size information preset for the window; and changing the window to the predetermined display size. When the window is returned to the original display state later, return display means for returning the window to the original display size based on the saved original size information and displaying the window is provided. Window display device.