x-list.html
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<!--
@license
Copyright (c) 2015 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
The complete set of authors may be found at http://polymer.github.io/AUTHORS
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
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
-->
<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../../iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../iron-list.html">
<dom-module id="x-list">
<style>
:host {
@apply(--layout-fit);
@apply(--layout-vertical);
display: block;
}
.item {
color: white;
}
.item:nth-child(odd) {
background-color: green;
}
.item:nth-child(even) {
background-color: red;
}
</style>
<template>
<iron-list style$="[[_computedListHeight(listHeight)]]" items="[[data]]" as="item" id="list">
<template>
<div class="item">
<div style$="[[_computedItemHeight(item)]]">[[item.index]]</div>
</div>
</template>
</iron-list>
</template>
</dom-module>
<script>
Polymer({
is: 'x-list',
properties: {
data: {
type: Array
},
itemHeight: {
type: Number,
value: 100
},
listHeight: {
type: Number,
value: 300
},
pre: {
type: Boolean
}
},
get list() {
return this.$.list;
},
_computedItemHeight: function(item) {
var css = this.pre ? 'white-space:pre;' : '';
if (item.height) {
css += this.itemHeight === 0 ? '' : 'height: ' + (item.height) + 'px;';
} else if (this.itemHeight) {
css += 'height: ' + (this.itemHeight) + 'px;';
}
return css;
},
_computedListHeight: function(listHeight) {
return 'height: ' + (listHeight) + 'px';
}
});
</script>