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Whiteboard canvas size and position roaming control method for improving processing efficiency

A technology of processing efficiency and roaming control, applied in the field of whiteboard Android system all-in-one machine, can solve the problems of information loss, canvas does not have zoom, movement, etc., to achieve the effect of improving efficiency, saving memory usage space, and improving processing efficiency

Pending Publication Date: 2020-11-24
北京盛世和安电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, on the whiteboard all-in-one machine of the Android system, the traditional whiteboard canvas can only be painted and recorded on the whiteboard, but the canvas does not have the functions of zooming and moving
When a page of canvas is full, clear the canvas or create a new page before continuing to use it; since clearing the canvas will erase the recorded content, the recorded information will be lost. In addition, creating a new page will also cause the same problem

Method used

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  • Whiteboard canvas size and position roaming control method for improving processing efficiency
  • Whiteboard canvas size and position roaming control method for improving processing efficiency
  • Whiteboard canvas size and position roaming control method for improving processing efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] [Example 1] Example of scaling operation

[0035] like image 3 As shown, the present invention realizes whiteboard roaming and space utilization by infinitely zooming the canvas, specifically as follows:

[0036] First, measure the width and height of the whiteboard all-in-one screen, and create a canvas equal to the width and height of the screen.

[0037] Set a canvas roaming switch in the whiteboard software. When the switch is turned on, the roaming function can be realized; when the switch is turned off, the roaming function is turned off, and the canvas cannot be zoomed or moved;

[0038] When the number of contact points between the fingers and the whiteboard all-in-one machine screen is greater than 1, it is judged as multiple points, and the pinching motion of multiple fingers inwards is used to zoom out; the motion of multiple fingers to expand outwards is used to zoom in; through gesture recognition , calculate the scaling parameter s, and after obtaining ...

Embodiment 2

[0053] [Embodiment 2] Embodiment of mobile operation

[0054] like Figure 4 As shown, the present invention realizes whiteboard roaming and space utilization by infinitely moving the canvas, as follows: First, create a canvas to cover the screen. The moving distance dx, dy, and then move correspondingly to the coordinate axes X and Y.

[0055] The movement of the canvas is similar to the zooming of the canvas. It is also the movement of the canvas with the movement of the content on the canvas and the change of coordinates. After the move is complete, the content on the canvas is redrawn, and the content before the move is not saved. Then move, and then redraw.

[0056] Since the strokes on the canvas are actually composed of individual points, each point has a size, X-axis, and Y-axis coordinates (px, py) when it is created, and these attributes and values ​​​​will be recorded in memory. When the canvas is moving, the content on the canvas is actually moving each point o...

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Abstract

The invention relates to a whiteboard canvas size and position roaming control method capable of improving processing efficiency. The method comprises the following steps: setting a canvas roaming switch in whiteboard software, after the switch is turned on, identifying a finger instruction by a canvas on a white board, and performing corresponding functions of zooming in and zooming out and the like; and selecting the width of a paintbrush, performing drawing operation on the whiteboard, and for each handwriting point generated by the paintbrush, extracting the handwriting points, and settingfive parameters. According to the zoom algorithm, the zoom-out index and the zoom-in index are controlled, CPU and memory resource consumption is reduced, meanwhile, the canvas space can be used infinitely through the function, limitation of the number of content in the canvas is avoided, and white board roaming is achieved.

Description

technical field [0001] The invention relates to the field of whiteboard Android system all-in-one machines, in particular to a whiteboard canvas size and position roaming control method that improves processing efficiency. Background technique [0002] With the development of science and technology and the improvement of the informatization level of schools and enterprises, the traditional chalk and oil pens are gradually eliminated and replaced by electronic whiteboards or all-in-one whiteboards. The whiteboard all-in-one machine is easy to install and powerful, and is more popular in the market. At present, on the whiteboard all-in-one machine of the Android system, the traditional whiteboard canvas can only be painted and recorded on the whiteboard, but the canvas does not have the functions of zooming and moving. When a page of canvas is full, clear the canvas or create a new page before continuing to use it; since clearing the canvas will erase the recorded content, th...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/0488G06T11/80
CPCG06F3/041G06F3/04883G06T11/80
Inventor 杨永欣郭绘华方天意王丽
Owner 北京盛世和安电子科技有限公司
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