paper-card-collapse.html

<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-collapse/iron-collapse.html">
<link rel="import" href="../paper-icon-button/paper-icon-button.html">
<link rel="import" href="../paper-header-panel/paper-header-panel.html">
<link rel="import" href="../paper-toolbar/paper-toolbar.html">

<!--
Paper card with a collapse/expand button in the header.
Collapsing will hide the content but keep the header
-->
<dom-module id="paper-card-collapse">
    <template>
        <style>
            :host {
                box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14),
                            0 1px 5px 0 rgba(0, 0, 0, 0.12),
                            0 3px 1px -2px rgba(0, 0, 0, 0.2);

                --paper-toolbar-background: #eee;
                --paper-toolbar-height: 32px;
                --paper-toolbar: {
                    border-top-left-radius: 2px;
                    border-top-right-radius: 2px;
                    border-bottom: 1px solid #e2e2e2;
                    color: var(--primary-text-color);
                    font-size: 14px;
                    overflow: hidden;
                    width: 295px;
                };
                --paper-toolbar-content: {
                    padding-right: 0;
                };
                --paper-header-panel: {

                };
                --paper-icon-button: {
                    width: 36px;
                    height: 36px;
                };
                --paper-header-panel-body: {
                    display: block;
                    flex: 0 1 auto;
                };
            }

            #collapse #collapse-padding {
                padding: 16px;
            }
        </style>
        <paper-header-panel mode="seamed" class="flex">
            <paper-toolbar>
                <span class="title" style="font-size: 14px; margin-left: 0;">{{heading}}</span>
                <paper-icon-button id="collapse-btn" icon="remove" title="Expand" on-tap="toggle"></paper-icon-button>
            </paper-toolbar>
            <div>
                <iron-collapse id="collapse" class="card-content" opened="true">
                    <div id="collapse-padding">
                        <content></content>
                    </div>
                </iron-collapse>
            </div>
        </paper-header-panel>
    </template>
    <script>
    (function() {
        'use strict';
        Polymer({
            is: 'paper-card-collapse',
            properties: {
                heading: {
                    type: String,
                    value: ''
                }
            },
            ready: function() {

            },
            toggle: function() {
                this.$.collapse.toggle();
                var collapseBtn = this.$$('#collapse-btn');
                var currentIcon = collapseBtn.getAttribute('icon');
                collapseBtn.setAttribute('icon', currentIcon === 'add' ? 'remove' : 'add');
            }
        });
    })();
    </script>
</dom-module>