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README.md

iron-iconset

The iron-iconset element allows users to define their own icon sets. The src property specifies the url of the icon image. Multiple icons may be included in this image and they may be organized into rows. The icons property is a space separated list of names corresponding to the icons. The names must be ordered as the icons are ordered in the icon image. Icons are expected to be square and are the size specified by the size property. The width property corresponds to the width of the icon image and must be specified if icons are arranged into multiple rows in the image.

All iron-iconset elements are available for use by other iron-iconset elements via a database keyed by id. Typically, an element author that wants to support a set of custom icons uses a iron-iconset to retrieve and use another, user-defined iconset.

Example:

<iron-iconset id="my-icons" src="my-icons.png" width="96" size="24"
    icons="location place starta stopb bus car train walk">
</iron-iconset>

This will automatically register the icon set "my-icons" to the iconset database. To use these icons from within another element, make a iron-iconset element and call the byId method to retrieve a given iconset. To apply a particular icon to an element, use the applyIcon method. For example:

iconset.applyIcon(iconNode, 'car');

Themed icon sets are also supported. The iron-iconset can contain child property elements that specify a theme with an offsetX and offsetY of the theme within the icon resource. For example.

<iron-iconset id="my-icons" src="my-icons.png" width="96" size="24"
    icons="location place starta stopb bus car train walk">
  <property theme="special" offsetX="256" offsetY="24"></property>
</iron-iconset>

Then a themed icon can be applied like this:

iconset.applyIcon(iconNode, 'car', 'special');