[OpenLayers-Users] Finding number of points in current Control.DrawFeature to allow undo() or cancel() to be called

[Robert Sanson]

I am trying to create a button that allows a user to undo or cancel a current sketch using a DrawFeature control with OpenLayers.Handler.Path and OpenLayers.Handler.Polygon

If there are >= 2 points, then the button should call control.undo(), but if only 1 point, then it should call control.cancel()

Here is some code for setting up a polygon layer epolys:

dpoly: new OpenLayers.Control.DrawFeature(epolys,OpenLayers.Handler.Polygon,{id: 'ctrldraw'})

here is one for a line layer elines:

dline: new OpenLayers.Control.DrawFeature(elines,OpenLayers.Handler.Path,{id: 'ctrldraw'})

Here is my undo code:

function undoFunc() {
	//undo when digitising new features
	var drawctrls = map.getControlsBy("id", "ctrldraw");
	for (var i = 0; i < drawctrls.length; i++){
		ctrl = drawctrls[i];
		if (ctrl.active) {
			ctrl.undo();
		}
	}
}

At the moment it just calls undo() but can't completely cancel().
Thanks,

Robert



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