Registers a callback that's fired when a drawing mode shape is changed.
Returns an ID which can be passed to unlisten() to unregister the callback.
| Usage | Returns |
|---|---|
DrawingTools.onShapeChange(callback) | String |
| Argument | Type | Details |
|---|---|---|
this: ui.map.drawingtools | ui.Map.DrawingTools | The ui.Map.DrawingTools instance. |
callback | Function | The callback to fire when the shape is changed. The callback is passed two parameters: the drawing mode shape as a string (or null for cancel) and the ui.Map.DrawingTools widget that the event listener is bound to. The shape values are: - point - line - polygon - rectangle - null |