JPH04342018A - Display controlling system for multi-window display system - Google Patents

Abstract

PURPOSE:To prevent a window not having outputted output for a long period from disturbing the input/output operation of another window, and in addition, to prevent the tube surface of a CRT from being burnt by erasing the window not having outputted the output for a long time after saving it to a save memory. CONSTITUTION:A window display monitoring means checks the displaying state of the windows A, B in respect of all the windows A, B, and in the case that it is decided that they are being displayed, it is decided whether no output is outputted in the window B for a definite period of time or not. If no output is outputted for the definite period of time, a window erasing means is started. The window erasing means saves window B data on a frame buffer to the save memory by a window save processing part, and erases the window B on the frame buffer. As the result, the window B is erased out of the screen of a display device. Thus, it can be prevented from disturbing the input/output operation of the other window A, and in addition, the tube surface of the CRT can be prevented from being burnt.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control method for a multi-window display system.

0002

2. Description of the Related Art In conventional display control systems for multi-window display systems, once a window is displayed, it remains displayed unless manually deleted.

0003

[Problems to be Solved by the Invention] In the display control method of the conventional multi-window display system described above, the previously displayed window remains displayed unless it is deleted, so input/output in other windows cannot be controlled. This poses a problem in that it becomes a nuisance when viewed from the outside, and when a CRT is used as a display device, it causes burn-in on the tube surface.

0004

[Means for Solving the Problems] The display control method of the multi-window display system of the present invention includes a frame buffer for storing window data, a save memory for saving the contents of the frame buffer, and an interrupt when a certain period of time has elapsed. an interval timer that generates a window, and a window display processing means that transfers window data from the save memory to the frame buffer and displays the window.
a window erasure processing means that transfers window data from the frame buffer to the save memory and erases the window; and a window erasure processing means that is activated by the interval timer and erases the window for a window that has not been drawn for a preset time or more. and window display monitoring means for activating the processing means and erasing the window.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a window display of the embodiment. As shown in FIG. 2(a), while a plurality of windows A and B are being displayed, the interval timer 7 generates an interrupt at regular time intervals to start the window display monitoring means 2. The window display monitoring means 2 determines the window display status (display/non-display) for all windows by the window display determination unit 21.
Check. If it is determined that the window is being displayed, the timeout determining unit 22 determines whether or not there is no output in window B for a certain period of time or more. If there is no output for a certain period of time or more, the window erasure processing means 3 is activated by the window erasure processing means activating section 23. As shown in FIG. 2(b), the window erasure processing means 3 causes the window save processing unit 31 to save the window B data on the frame buffer 9 to the save memory 8, and causes the window erasure processing unit 32 to save the window B data on the frame buffer 9. Delete window B data. As a result, window B is erased from the screen of the display device 10, as shown in FIG. 2(c).

Next, when a drawing instruction is received from the host device 11, the drawing processing means 4 is activated. When the save window determining unit 41 determines that window B has been erased, the drawing processing unit 4 causes the window display processing unit activating unit 42 to activate the window display processing unit 6, as shown in FIG. 2(d). do. The window display processing means 6 restores the window B by transferring the window B data from the save memory 8 to the frame buffer 9 using the window restore processing section 61. As a result, window B is restored on the screen of the display processing 10, as shown in FIG. 2(e). Thereafter, the drawing processing section 43 of the drawing processing means 4 performs drawing on the window of the frame buffer 9.

Furthermore, by activating the screen restoration processing means 5 from the input means 1, the operator can restore the original screen on the display device 10. The screen restoration processing means 5 uses a save window determination unit 51 to determine whether windows A and B have been erased for all windows. If it is determined that the window has been erased, the window display processing means starting section 52 starts the window display processing means 6 and restores all the erased windows on the screen of the display device 10.

[0008]

[Effects of the Invention] As explained above, the present invention saves windows that have not been output for a long time to the save memory, and then
By erasing the window, it is possible to prevent it from interfering with the input/output operations of other windows, and also to prevent burn-in on the CRT tube surface.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a diagram showing an example of a window display in the same embodiment.

[Explanation of symbols]

1 Input means 2 Window display monitoring means 3 Window deletion processing means 4 Drawing processing means 5 Screen restoration processing means 6 Window display processing means 7 Interval timer 8 Save memory 9 Frame buffer 10 Display device 11 Host device 21 Window display judgment unit 22 Timeout judgment Section 23 Window deletion processing means starting section 31
Window save processing unit 32 Window deletion processing unit 41 Save window determination unit 42 Window display processing means activation unit 43
Drawing processing unit 51 Save window determination unit

Claims (3)

[Claims] 1. A frame buffer that stores window data, a save memory that saves the contents of the frame buffer, an interval timer that generates an interrupt when a certain period of time has elapsed, and a frame buffer that stores window data from the save memory into the frame buffer. window display processing means for transferring the window data from the frame buffer to the save memory and displaying the window; window erasing processing means for transferring the window data from the frame buffer to the save memory and erasing the window; A display control method for a multi-window display system, comprising window display monitoring means for activating the window erasing processing means for windows for which drawing is not being performed and for erasing the windows. 2. A drawing process that is started from a host device and, if a window to be drawn is erased, starts the window display processing means, displays the window, and then draws in the frame buffer. 2. A display control method for a multi-window display system according to claim 1, further comprising means for controlling a display in a multi-window display system. 3. The screen restoration processing means is activated by an input means, activates the window display processing means, and causes all windows erased by the window display monitoring means to be displayed on the frame buffer. A display control method for a multi-window display system according to claim 1 or 2.