How to Show/ hide part of canvas?

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Link to JS Fiddle

I have a requirement like when user clicks on center circle, that should toggle outer circle and when user clicks on outer small circles that should change center circle value.

Here i am not getting how to Show/ hide part of Canvas when user clicks on center circle?

Any help on how to do this?

Posted 15-Dec-14 23:29pm

Sri Nivas.M

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Kornfeld Eliyahu Peter · Answer 1 · 2014-12-15T23:37:00

Solution 1

<canvas%gt; is an atomic building block of HTML5 (element) and can not be partially hidden...
The only way is repaint the content of your canvas according to your need (not to paint the hidden parts)...

Posted 15-Dec-14 23:37pm

Kornfeld Eliyahu Peter

Comments

Sri Nivas.M 16-Dec-14 5:45am

Okay. I am trying with clip Property in CSS, which is not even showing any effect on canvas element :(

Kornfeld Eliyahu Peter 16-Dec-14 6:02am

Try this
canvas {
clip-path: polygon(...);
}

Sri Nivas.M 16-Dec-14 6:12am

Not worked..:(

Kornfeld Eliyahu Peter 16-Dec-14 6:35am

You better show us your code that 'not worked'...

Sri Nivas.M 16-Dec-14 6:40am

i have added CSS like

canvas#canvasFlag {
-webkit-clip-path: circle(20px at 100px 100px);
-moz-clip-path: circle(20px at 100px 100px);
-ms-clip-path: circle(20px at 100px 100px);
clip-path: circle(20px at 100px 100px);
}

Clip path is working only in Chrome not working in IE, Safari, Firefox

For Remaining code i have already given JS fiddle link