[OpenLayers-Users] DrawFeature: how to clear?

[Kevin Kempfer]

Hello,

Christopher Schmidt schrieb:
>> how can I clear the map of all/specific drawed features?
>> example:
>> http://www.openlayers.org/dev/examples/draw-feature.html
> 
> http://dev.openlayers.org/docs/OpenLayers/Layer/Vector.html#removeFeatures

Thanks. Works fine but I have a behaviour that is not clear to me. I can 
reproduce it like this:

1. draw a feature (polygon, line, point)
2. select it (hover or click)
3. remove all features: vectors.removeFeatures(vectors.features);
- everything disappears as desired.
4. again, draw a feature
5. select it

What happens is the first (deleted) polygon re-appearing. Am I missing 
something, here?

Here's the code:

var map, drawControls, vectors;

function createMap(){
  map = new OpenLayers.Map('map', {controls: []});
			
  var jpl = new OpenLayers.Layer.KaMap( "Satellite",
                     "http://dev/map.php", {g: "satellite", map:  "world"});
  jpl.displayOutsideMaxExtent = 1;

  vectors = new OpenLayers.Layer.Vector("Vector Layer");

  map.addLayers([jpl, vectors]);

  DrawControls = {
         point: new OpenLayers.Control.DrawFeature(vectors,
                    OpenLayers.Handler.Point),
         line: new OpenLayers.Control.DrawFeature(vectors,
                   OpenLayers.Handler.Path, options),
         polygon: new OpenLayers.Control.DrawFeature(vectors,
                      OpenLayers.Handler.Polygon, options),
         select: new OpenLayers.Control.SelectFeature(vectors),
         hover: new OpenLayers.Control.SelectFeature(vectors,
                                                   {hover: true})
  };
  for(var key in drawControls) {
     map.addControl(drawControls[key]);
  }

  var start_point = new OpenLayers.LonLat(8,50);
  map.setCenter(start_point,5);

  }
}

         function toggleControl(element) {
             for(key in drawControls) {
                 var control = drawControls[key];
                 if(element.value == key && element.checked) {
                     control.activate();
                 } else {
                     control.deactivate();
                 }
             }
         }

         function clearall(){
		vectors.removeFeatures(vectors.features);
         }

         function clearSelected(){
         	vectors.removeFeatures(vectors.selectedFeatures);
         }


Regards,

Kevin.
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