New Post: Adding Labels to a MapPointLayer stops selection being possible

Hi,

I have a super simple prototype app illustrating my problem which you can download from here:

https://dl.dropboxusercontent.com/u/2497368/PlanningPrototype.zip

I have an app that allows me to switch between SelectionMode and my own "Add Points Mode" using the S and P keys:

        private void MapContainer_OnKeyUp(object sender, KeyEventArgs e)
        {
            _ignoreClick = true;
            if (e.Key == Key.P)
            {
                _ignoreClick = false;
                _map.FunctionMode = FunctionMode.None;
                _map.Cursor = Cursors.Cross;
            }
            if (e.Key == Key.S)
            {
                _map.FunctionMode = FunctionMode.Select;
            }
        }

I'm setting up a MapPointLayer like so:

            _featureSet = new FeatureSet(FeatureType.Point);
            DataColumn column = new DataColumn("PointID");
            _featureSet.DataTable.Columns.Add(column);

            _pointLayer = (MapPointLayer)_map.Layers.Add(_featureSet);
            _pointLayer.Symbolizer = new PointSymbolizer(System.Drawing.Color.Red, DotSpatial.Symbology.PointShape.Star, 30);
            _pointLayer.SelectionSymbolizer = new PointSymbolizer(System.Drawing.Color.Yellow, DotSpatial.Symbology.PointShape.Star, 30);

Then I'm subscribing to the GeoMouseMove event and Click event of the Map:

        private void MapOnMouseMove(object sender, GeoMouseArgs geoMouseArgs)
        {
            // Storing this as it doesn't seem to be available in the Click event
            _geoMouseArgs = geoMouseArgs;  
        }

        void MapOnClick(object sender, EventArgs e)
        {
            if (_ignoreClick) return;

            Coordinate coord = _map.PixelToProj(_geoMouseArgs.Location);
            Point point = new Point(coord);
            IFeature feature = _featureSet.AddFeature(point);
            feature.DataRow["PointID"] = _pointId++;

            _map.ResetBuffer();
        }

This all works fine, although the selection tool doesn't work quite as expected. If I add 3 points to the map and then use the selection tool to select one of them; when I select another one, the first one doesn't unselect. Strange, but I can get around it with a call to _pointLayer.UnSelectAll() in the Click handler.

Next I try to add labels by adding this after I setup the MapPointLayer:

            _labelLayer = new MapLabelLayer(_pointLayer);
            _labelLayer.FeatureLayer = (IMapFeatureLayer)_pointLayer;
            _labelLayer.FeatureSet = _featureSet;
            _labelLayer.Symbology.Categories[0].Expression = "[PointID]";
            _labelLayer.Symbolizer.FontSize = 8F;
            _labelLayer.Symbolizer.BorderVisible = false;
            _labelLayer.Symbolizer.DropShadowEnabled = false;
            _labelLayer.Symbolizer.OffsetX = 20;
            _pointLayer.LabelLayer = _labelLayer;
            _pointLayer.ShowLabels = true;

This does one of two things, it stops the points from being selectable at all, and it only adds a label to the first point, none of the remaining points receive a label. I seem to be able to fix the remaining labels by adding this to the end of the Click handler:

            _featureSet.ShapeIndices = null;
            _featureSet.UpdateExtent();
            _pointLayer.AssignFastDrawnStates();
            _labelLayer.CreateLabels();

However I still can't select my points!

Any ideas?

Thanks,
Anthony