Sha256: 483549154f9b81e2383465bc4b56999ed8a25c78c7eedb310b0b250b239304d1
Contents?: true
Size: 1.75 KB
Versions: 5
Compression:
Stored size: 1.75 KB
Contents
<!--
@license
Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../app-scroll-effects-behavior.html">
<script>
/**
* While scrolling down, fade in the rear background layer and fade out the front background
* layer (opacity interpolated based on scroll position).
*/
Polymer.AppLayout.registerEffect('blend-background', {
/** @this Polymer.AppLayout.ElementWithBackground */
setUp: function setUp() {
var fx = {};
fx.backgroundFrontLayer = this._getDOMRef('backgroundFrontLayer');
fx.backgroundRearLayer = this._getDOMRef('backgroundRearLayer');
fx.backgroundFrontLayer.style.willChange = 'opacity';
fx.backgroundFrontLayer.style.transform = 'translateZ(0)';
fx.backgroundRearLayer.style.willChange = 'opacity';
fx.backgroundRearLayer.style.transform = 'translateZ(0)';
fx.backgroundRearLayer.style.opacity = 0;
this._fxBlendBackground = fx;
},
/** @this Polymer.AppLayout.ElementWithBackground */
run: function run(p, y) {
var fx = this._fxBlendBackground;
fx.backgroundFrontLayer.style.opacity = 1 - p;
fx.backgroundRearLayer.style.opacity = p;
},
/** @this Polymer.AppLayout.ElementWithBackground */
tearDown: function tearDown() {
delete this._fxBlendBackground;
}
});
</script>
Version data entries
5 entries across 5 versions & 1 rubygems