= Styler =
[[TOC]]

We need a GUI to allow users to do Styling of different Layers:
* Polygon Feature layers
* Shapefile layers
* Theme layers

The Style is stored in the per-config link table with the layer, so that the same data can be styled differently for different users. It is a JSON structure:
* https://github.com/flavour/eden/blob/master/modules/s3db/gis.py#L2007

== Basic ==
* Read current setting
* Predefined palette
* Updates Layer Setting
* Updates All Features in realtime
 * http://dev.openlayers.org/docs/files/OpenLayers/Style-js.html
 * addRules()
 * applySymbolizer()
* Initial applying of style to features not possible via feature.layer.style as not yet set
* Save of setting occurs with rest of Map save (also provide explicit option within widget or do automatically?)

== Advanced ==
* http://gxp.opengeo.org/master/examples/histogram.html
* Add ability to select colours/opacity/etc:
 * http://gxp.opengeo.org/master/examples/symbolizer.html
 * + Colour wheel
* Add ability to select number of breaks
 * options: Linear, Log, which can be manually adjusted

We should be able to integrate [http://colorbrewer2.org ColorBrewer] for colour ramps: Sequential vs Diverging

We should be able to break up the data in various ways, like QGIS can:
* http://multimedia.journalism.berkeley.edu/tutorials/qgis-basics-journalists/choropleth/