designer

designer.html

<link href="../core-scaffold/core-scaffold.html" rel="import">
<link href="../core-header-panel/core-header-panel.html" rel="import">
<link href="../core-menu/core-menu.html" rel="import">
<link href="../core-item/core-item.html" rel="import">
<link href="../core-icon-button/core-icon-button.html" rel="import">
<link href="../core-toolbar/core-toolbar.html" rel="import">
<link href="../core-menu/core-submenu.html" rel="import">

<polymer-element name="my-element">

  <template>
    <style>    
      #design_host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
      }
      #core_scaffold {
        position: absolute;
        top: 0px;
        right: 0px;
        bottom: 0px;
        left: 0px;
      }
      #core_header_panel {
        background-color: rgb(255, 255, 255);
      }
      #core_toolbar {
        background-color: rgb(79, 125, 201);
        color: rgb(255, 255, 255);
      }
      #core_menu {
        font-size: 16px;
      }
    </style>
    <core-scaffold id="core_scaffold">
      <core-header-panel mode="seamed" id="core_header_panel" flex navigation>
        <core-toolbar id="core_toolbar"></core-toolbar>
        <core-menu selected="Item1" valueattr="label" selectedindex="0" id="core_menu" theme="core-light-theme">
          <core-item id="core_item" label="Item1" icon="settings" on-tap="{{ tap }}" layout center horizontal active></core-item>
          <core-item id="core_item1" label="Item2" icon="settings" layout center horizontal></core-item>
        </core-menu>
      </core-header-panel>
      <div id="div" tool>Title</div>
    </core-scaffold>
  </template>

  <script>

    Polymer({
      tap: function (){
      	this.$.core_header_panel.narrow="true";
      }
    });

  </script>

</polymer-element>