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Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
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This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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Code distributed by Google as part of the polymer project is also
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subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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<title>paper-scroll-header-panel: transform header</title>
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
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<meta name="mobile-web-app-capable" content="yes">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<script src="../../webcomponentsjs/webcomponents-lite.js"></script>
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<link rel="import" href="../paper-scroll-header-panel.html">
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<link rel="import" href="../../paper-toolbar/paper-toolbar.html">
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<link rel="import" href="../../iron-icons/iron-icons.html">
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<link rel="import" href="../../paper-icon-button/paper-icon-button.html">
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<link rel="import" href="../../paper-styles/color.html">
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<link rel="import" href="../../iron-flex-layout/iron-flex-layout.html">
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<link rel="import" href="sample-content.html">
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<link rel="stylesheet" href="../../paper-styles/demo.css">
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<style is="custom-style">
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paper-scroll-header-panel {
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background-color: var(--paper-grey-200, #eee);
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/* background for toolbar when it is at its full size */
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--paper-scroll-header-panel-full-header: {
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background-image: url(images/bg1.jpg);
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/* background for toolbar when it is condensed */
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--paper-scroll-header-panel-condensed-header: {
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background-image: url(images/bg4.jpg);
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/* custom toolbar height */
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background-color: transparent;
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paper-toolbar.tall .title {
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-webkit-transform-origin: left center;
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transform-origin: left center;
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--paper-icon-button-ink-color: white;
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@apply(--layout-flex);
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<!-- By default condensedHeaderHeight is 1/3 of the header's height. Here
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we want to set the condensed header's height to be 64px. -->
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<paper-scroll-header-panel condenses header-height="256" condensed-header-height="64">
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<paper-toolbar class="tall">
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<paper-icon-button icon="arrow-back"></paper-icon-button>
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<div class="spacer"></div>
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<paper-icon-button icon="search"></paper-icon-button>
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<paper-icon-button icon="more-vert"></paper-icon-button>
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<div class="bottom title">Title</div>
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<sample-content size="100"></sample-content>
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</paper-scroll-header-panel>
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// custom transformation: scale header's title
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var title = document.querySelector('.title');
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addEventListener('paper-header-transform', function(e) {
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var m = d.height - d.condensedHeight;
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var scale = Math.max(0.75, (m - d.y) / (m / 0.25) + 0.75);
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Polymer.Base.transform('scale(' + scale + ') translateZ(0)', title);