# GeoExt

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# `GeoExt.data.StyleReader`

Extends
  - Ext.data.JsonReader

class `GeoExt.data.``StyleReader`

A smart reader that creates records for client-side rendered legends. If its store is configured with an `OpenLayers.Style2` instance as `data`, each record will represent a Rule of the Style, and the store will be configured with `symbolizers` (Array of `OpenLayers.Symbolizer`), `filter` (`OpenLayers.Filter`), `label` (String, the rule’s title), `name` (String), `description` (String), `elseFilter` (Boolean), `minScaleDenominator` (Number) and `maxScaleDenominator` (Number) fields. If the store’s `data` is an `OpenLayers.Symbolizer.Raster` instance, records will represent its ColorMap entries, and the available fields will only be `symbolizers` (object literal with `color` and `opacity` properties from the ColorMapEntry, and stroke set to false), `filter` (String, the ColorMapEntry’s quantity) and `label` (String).

The store populated by this reader is synchronized with the underlying data object. To write back changes to the Style or Symbolizer object, call `commitChanges` on the store.

Note

Calling `commitChanges` on the store that is populated with this reader will fail with OpenLayers 2.11 - it requires at least revision https://github.com/openlayers/openlayers/commit/1db5ac3cbe874317968f78832901d6ef887ecca6 from 2011-11-28 of OpenLayers.

## Example Use

Sample code to create a store that reads from an `OpenLayers.Style2` object:

    var store = new Ext.data.Store({
        reader: new GeoExt.data.StyleReader(),
        data: myStyle // OpenLayers.Style2 or OpenLayers.Symbolizer.Raster
    });

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