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Canvas display control method and system

A display control method and display control technology, which are applied to program control devices, instruments, computing, etc., can solve problems such as inconvenience for users to view and low viewing convenience.

Active Publication Date: 2020-03-06
GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the canvas exceeds the current screen display area, a blank area will appear around the screen during panning and zooming out, which is not easy for users to view
The traditional canvas display control method has the disadvantage of low viewing convenience

Method used

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  • Canvas display control method and system
  • Canvas display control method and system
  • Canvas display control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] In one embodiment, a canvas display control method is suitable for canvas display control in drawing and typesetting software. Such as figure 1 As shown, the above method includes the following steps:

[0021] Step S110: When an input canvas display operation instruction is detected, acquire the part of the preset area of ​​the canvas and cache the canvas in the current display part of the screen to obtain corresponding first and second cached images.

[0022] The canvas display operation instruction refers to an instruction for controlling the canvas display, which can be input by the user through devices such as a mouse or a touch screen. The specific type of the canvas display operation instruction is not unique, and may be an instruction to control the canvas to zoom and display, or an instruction to control the canvas to pan.

[0023] When an input canvas display operation instruction is detected, it is recorded as the operation start, and the current display are...

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Abstract

The invention relates to a control method and system of canvas display. A preset area part of the canvas and a current display part of the canvas on a screen are obtained and cached when an input operating instruction of the canvas display is detected, then a first cache image and a second cache image corresponding to each other are received. Coordinates to be displayed, corresponding to screen coordinates, of the first cache image and the second cache image are respectively obtained according to the operating instruction of the canvas display. Colors of the corresponding screen coordinates are obtained according to colors of the corresponding positions of the coordinates to be displayed of the first cache image and the second cache image. A superposition image corresponding to the operating instruction of the canvas display is obtained according to the color of each screen coordinate and is output to the screen to be displayed. The preset area part of the canvas and the current display part of the canvas are obtained and cached at the same time and then the two cache images are synthesized to be displayed on the screen, thereby avoiding a blank space which appears in the process of controlling the canvas display and influences the users' watching and improving the watching convenience.

Description

technical field [0001] The present invention relates to the technical field of intelligent terminals, in particular to a canvas display control method and system. Background technique [0002] With the advent of the information society, the development of modern information display technology has been promoted. Canvas-based drawing and typesetting tool software is more and more widely used. Canvas is used for drawing, typesetting and displaying, so as to view relevant information, such as electronic maps and slides. The observer zooms or pans the canvas by inputting commands, so as to display the desired content for viewing. [0003] The traditional canvas display control method is that when the user tries to pan or zoom the canvas, the currently rendered area is panned and zoomed, and then rendered to the interface for display. If the canvas exceeds the current display area of ​​the screen, a blank area will appear around the screen during panning and zooming out, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0484G06F9/451G06T11/80
CPCG06F3/04845G06F9/451G06T11/80
Inventor 吕毅
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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