<!--
@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.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
-->
<!doctype html>
<html id="html">
<head>
<title>Load data using iron-scroll-threshold</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1, user-scalable=no">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<script src="../../webcomponentsjs/webcomponents-lite.js"></script>
<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../../iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../../iron-scroll-threshold/iron-scroll-threshold.html">
<link rel="import" href="../../paper-styles/color.html">
<link rel="import" href="../../paper-styles/typography.html">
<link rel="import" href="../../app-layout/app-toolbar/app-toolbar.html">
<link rel="import" href="../../paper-spinner/paper-spinner.html">
<link rel="import" href="../../iron-ajax/iron-ajax.html">
<link rel="import" href="../../iron-icons/iron-icons.html">
<link rel="import" href="../iron-list.html">
<style is="custom-style">
body {
@apply(--paper-font-common-base);
margin: 0;
padding: 0;
background-color: #eee;
}
app-toolbar {
position: fixed;
top: 0;
left: 0;
right: 0;
background: #F57C00;
box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.3);
color: white;
z-index: 1;
font-weight: bold;
}
.loadingIndicator {
text-align: center;
height: 40px;
}
.loadingIndicator paper-spinner {
width: 20px;
height: 20px;
margin-right: 10px;
}
iron-list {
padding-top: 64px;
padding-bottom: 16px;
--iron-list-items-container: {
max-width: 800px;
margin: auto;
margin-top: 60px;
margin-bottom: 10px;
};
}
.personItem {
@apply(--layout-horizontal);
margin: 16px 16px 0 16px;
padding: 20px;
border-radius: 8px;
background-color: white;
border: 1px solid #ddd;
}
.pad {
padding: 0 16px;
@apply(--layout-flex);
@apply(--layout-vertical);
}
.primary {
font-size: 16px;
font-weight: bold;
}
.secondary {
font-size: 14px;
}
.dim {
color: gray;
}
.spacer {
@apply(--layout-flex);
}
.index {
width: 30px;
}
</style>
</head>
<body unresolved>
<template is="dom-bind" id="app">
<iron-ajax id="ajax"
url="http://www.filltext.com/"
params='{"rows": "20", "delay": 1, "fname":"{firstName}", "lname": "{lastName}", "address": "{streetAddress}",
"city": "{city}", "state": "{usState|abb}", "zip": "{zip}", "business": "{business}", "index": "{index}"}'
handle-as="json"
loading="{{loadingPeople}}"
on-response="_didRespond">
</iron-ajax>
<app-toolbar>
<div title>Load data using iron-scroll-threshold</div>
</app-toolbar>
<iron-list id="list" items="[]" as="person" scroll-target="html">
<template>
<div>
<div class="personItem" tabindex$="[[tabIndex]]">
<div class="pad">
<div class="primary">[[person.fname]] [[person.lname]]</div>
<div class="secondary">[[person.address]] [[person.city]]</div>
<div class="secondary">[[person.city]], [[person.state]] [[person.zip]]</div>
<div class="secondary dim">[[person.business]]</div>
</div>
<iron-icon icon$="[[_iconForPerson(person)]]"></iron-icon>
</div>
</div>
</template>
</iron-list>
<div class="loadingIndicator">
<paper-spinner active="{{loadingPeople}}"></paper-spinner> Fetching data
</div>
<!-- this element will load more data when the user scrolls down and reached the lower threshold -->
<iron-scroll-threshold id="scrollTheshold"
lower-threshold="500"
on-lower-threshold="_loadMoreData"
scroll-target="html">
</iron-scroll-threshold>
</template>
<script>
(function(scope) {
scope._iconForPerson = function(person) {
return person.integer < 50 ? 'star-border' : 'star';
};
scope._loadMoreData = function() {
scope.$.ajax.generateRequest();
};
scope._didRespond = function(e) {
var people = e.detail.response;
people.forEach(function(person) {
scope.$.list.push('items', person);
});
// Clear the lower threshold so we can load more data when the user scrolls down again.
scope.$.scrollTheshold.clearTriggers();
};
})(document.querySelector('#app'));
</script>
</body>
</html>