ol-ext: control Legend

The ol/control/Legend computes a legend based on ol/style/Style and draw it on the map.

You can add or remove rows in the legend.
The control use a style or a feature with a style or a style functions to handle styles based on feature properties.
A select event is fired when click on the rows in the legend control.
You can use the ol.legend.Legend.getLegendImage() function to retrieve an image of a single style or feature.

Title:
margin:
symbol: x
draw in map
Select an object on the map and add it to the legend...