JPH02110627A - Displaying method for multi-window picture - Google Patents

Abstract

PURPOSE:To update multi-window display without increasing the load of a computer by giving display updating timing corresponding to the depth of each window to all the windows in the midst of being displayed. CONSTITUTION:A window display control table 1 consisting of five pieces of information 11 to 15 is provided for one window. In the case where a display updating request arises, and each window is updated, the window on this side most is display-updated by the basic display updating period 13 of a picture in the midst of being displayed, and subsequently, according as the depth of the window becomes deeper, the basic display updating period 13 is multiplied by a factor corresponding to the depth of the window, and an executive display updating period 14 is determined, and the window is display-updated by this period. Even if a multi-window displaying picture is display-updated, the load of the computer can be suppressed low.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device for a computer, and particularly to a method for displaying a multi-window screen suitable for reducing the load of display processing.

[Conventional technology]

In computer display devices, a multi-window display method that assumes multiple virtual screens called windows for one physical screen and displays different information on each window is used on workstations and the like. - An example is described in JP-A-61-161543.

[Problem to be solved by the invention]

Conventional technology does not take into account the updating of display information on the screen currently displayed in the window, and in systems that monitor plant status in real time, it is necessary to update the display on each screen to always display the latest information on the screen. Therefore, if you try to display a multi-window screen 33 with screen 31 and screen 32 as windows on the plant monitoring screen as shown in FIG.
If both the screen 32 and the screen 32 were to be updated in one second, the screen display program existing for each window would operate at the respective display update timings, which would increase the load on the computer.

An object of the present invention is to provide multi-window display suitable for plant monitoring without increasing computer load.

[Means to solve the problem]

The above object is achieved by providing display update timing corresponding to the depth of each window to all windows being displayed.

[Effect]

In the multi-window display, the window is opened when there is a request from the operator, or when a change occurs in the plant and the computer automatically requests it, or when displaying higher-priority information. A new window will open on top of the already displayed window. That is, in a state where windows overlap, the window displayed in front has a higher priority.

Therefore, in the present invention, when updating the display for each window, the display is updated for the window that is displayed in the foreground at the basic display update cycle of the screen currently displayed in that window. As the depth becomes deeper, the basic display update cycle of the screen being displayed in the window is multiplied by the number of threads corresponding to the depth of the window to determine the execution display update cycle, and the window display is updated according to the execution display update cycle.

As described above, according to the present invention, the display of a multi-window screen can be updated without increasing the load on the computer.

〔Example〕

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

FIG. 1 shows a window display management table 1 for managing display updates in a multi-window display according to the present invention. 1
1.Screen No. 12, consists of information on a basic display update cycle 13, an execution display update cycle 14, and a display update counter 15,
There are cases corresponding to the number of windows that can be displayed on one physical screen.

Now, if a display request is made for one screen, block Na1O-20 of the multi-window display process in Figure 2
It is determined that the activation factor is a new request at the root of
In block 30, the window 1-window display management table 1 is searched to determine whether there is a window already being displayed on the physical screen. If there is a window already being displayed at this time, in block 40, the execution display update period 14 of the window display management table 1 is changed in accordance with the opening of a new window and the deepening of the window. Next, in blocks 50-60-70, a window is opened to display the screen requested for new display, and window No. 11
, screen no. 12. Basic display update cycle 1 corresponding to the screen
Store 3. At this time, the same value as the basic display update cycle 13 is stored in the execution display update cycle 14. Finally, in block 80, the display update counter 15 is reset for the next display update.

If activated by a display update request, block 1 in Figure 2
0-140, execute the process from 1 to block 140.
Display update counter 1 of window display management table 1
Update the value of 5. In block 150, the value of the display update counter 15 and the value of the execution display update cycle 14 are determined, and if display update is necessary, display update processing and reset of the display update counter 15 are performed in blocks 160-170. Above block 4. The process of O-180 is performed on all windows currently displayed, but since the execution display update cycle 14 determined here is larger than the basic display update cycle 13 originally stored in each screen, when updating the display. The load on the computer can be kept low.

Furthermore, a display request for a screen that is already being displayed is processed through the route of block 10-20-90 in FIG.
By moving the window displaying the request screen to the front in block 110 and updating the display, the load on the computer is reduced compared to when a new display is performed.

As described above, according to this embodiment, even if the display is updated on the multi-window display screen, the load on the computer can be kept low.

〔Effect of the invention〕

As described above, according to the present invention, multi-window display can be performed without increasing the load on the computer.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a window display management table, FIG. 2 is a diagram showing multi-window display processing, and FIG. 3 is a diagram showing an example of multi-window display. 1... Window display management table, 11... Window No. , 12...Screen No. , 13... Basic display update cycle, 14... Execution display update cycle, 15...
・Display update counter, 31...Plant monitoring screen example 1
．． 32...Plant monitoring screen example 2.33...Multi-window display screen example. Figure 2

Claims (1)

[Claims] 1. In a multi-window screen computer display device that has one physical screen and the function of displaying multiple virtual screens for that physical screen, the currently displayed window number
．． and the currently displayed screen number. 1. A method for displaying a multi-window screen, characterized in that the display update period for each window is stored, and the display update period for each window is changed in accordance with the overlap of windows being displayed.