在对话框中选择时调整的大小

resizeable_dialog.html

<link rel="import" href="/go.html?url=../../packages/polymer/polymer.html">

<link rel="import" href="/go.html?url=../../packages/paper_elements/paper_dialog.html">
<link rel="import" href="/go.html?url=../../packages/paper_elements/paper_button.html">
<link rel="import" href="/go.html?url=../../packages/paper_elements/paper_tabs.html">
<link rel="import" href="/go.html?url=../../packages/paper_elements/paper_tab.html">
<link rel="import" href="/go.html?url=../../packages/paper_elements/paper_icon_button.html">
<link rel="import" href="/go.html?url=../../packages/core_elements/core_toolbar.html">
<link rel="import" href="/go.html?url=../../packages/core_elements/core_pages.html">

<polymer-element name="resizeable-dialog">
  <template>
    <style>
      :host {
        display: block;
      }
    </style>
    <paper-button on-click="{{open}}">Open Dialog</paper-button>    
    <paper-dialog id="dialog" transition="core-transition-bottom" backdrop>
      <paper-tabs selected="{{selected}}">
        <paper-tab>Page 1</paper-tab>
        <paper-tab>Page 2</paper-tab>
      </paper-tabs>
      <section>
        <core-pages selected="{{selected}}">
          <div style="width: 100px; height: 100px;">
            <div>Page 1: 100x100</div>
            <paper-button on-click="{{notifyResize}}">Call 'notifyResize'</paper-button>          
          </div>
          <div style="width: 400px; height: 400px;">
            <div>Page 2: 400x400</div>
            <paper-button on-click="{{notifyResize}}">Call 'notifyResize'</paper-button>          
          </div>
        </core-pages>
      </section>
    </paper-dialog>

  </template>
  <script type="application/dart" src="resizeable_dialog.dart"></script>
</polymer-element>
<link rel="import" hre