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66 lines
1.6 KiB
Markdown
66 lines
1.6 KiB
Markdown
paper-ripple
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============
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`paper-ripple` provides a visual effect that other paper elements can
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use to simulate a rippling effect emanating from the point of contact. The
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effect can be visualized as a concentric circle with motion.
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Example:
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```html
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<paper-ripple></paper-ripple>
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```
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`paper-ripple` listens to "mousedown" and "mouseup" events so it would display ripple
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effect when touches on it. You can also defeat the default behavior and
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manually route the down and up actions to the ripple element. Note that it is
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important if you call downAction() you will have to make sure to call
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upAction() so that `paper-ripple` would end the animation loop.
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Example:
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```html
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<paper-ripple id="ripple" style="pointer-events: none;"></paper-ripple>
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...
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<script>
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downAction: function(e) {
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this.$.ripple.downAction({x: e.x, y: e.y});
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},
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upAction: function(e) {
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this.$.ripple.upAction();
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}
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</script>
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```
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Styling ripple effect:
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Use CSS color property to style the ripple:
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```css
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paper-ripple {
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color: #4285f4;
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}
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```
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Note that CSS color property is inherited so it is not required to set it on
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the `paper-ripple` element directly.
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By default, the ripple is centered on the point of contact. Apply the ``recenters`` attribute to have the ripple grow toward the center of its container.
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```html
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<paper-ripple recenters></paper-ripple>
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```
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Apply `center` to center the ripple inside its container from the start.
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```html
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<paper-ripple center></paper-ripple>
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```
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Apply `circle` class to make the rippling effect within a circle.
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```html
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<paper-ripple class="circle"></paper-ripple>
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```
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