/// <summary>
/// DrawPolyline_MouseClick
/// draw polyline as a series of click nodes
/// drawn as two polylines
/// base buffer thickness
/// top polyline
/// </summary>
private void DrawPolyline_MouseClick(object sender, MouseButtonEventArgs e)
{
if (draw)
{
Location loc = _map.ViewportPointToLocation(e.GetPosition(_map));
if (startdraw)
{
//first click
_layerDraw.Children.Clear();
//add a profile drawline of zero length
_layerDraw.CaptureMouse();
_map.MouseMove += new MouseEventHandler(DrawPolyline_MouseMove);
_map.MouseDoubleClick += new EventHandler <MapMouseEventArgs>(DrawPolyline_MouseDoubleClick);
drawbuffer = new MapPolyline();
drawbuffer.Name = "Buffer";
drawbuffer.StrokeEndLineCap = PenLineCap.Round;
drawbuffer.StrokeStartLineCap = PenLineCap.Round;
drawbuffer.StrokeLineJoin = PenLineJoin.Round;
drawbuffer.StrokeMiterLimit = 0;
drawbuffer.Stroke = (SolidColorBrush)this.Resources["DrawToolFillBrush"];
drawbuffer.Locations = new LocationCollection();
drawbuffer.Locations.Add(loc);
drawbuffer.Locations.Add(loc);
_layerDraw.Children.Add(drawbuffer);
drawline = new MapPolyline();
drawline.Stroke = (SolidColorBrush)this.Resources["DrawToolStrokeBrush"];
drawline.StrokeThickness = 2;
drawline.StrokeEndLineCap = PenLineCap.Flat;
drawline.StrokeLineJoin = PenLineJoin.Bevel;
drawline.StrokeMiterLimit = 0;
drawline.Locations = new LocationCollection();
drawline.Locations.Add(loc);
drawline.Locations.Add(loc);
_layerDraw.Children.Add(drawline);
startdraw = false;
}
else
{
//subsequent clicks
drawline.Locations.Add(loc);
drawbuffer.Locations.Add(loc);
if (drawbuffer.Locations.Count < 4)
{
drawbuffer.StrokeThickness = BufferSlider.Value * 2000 / GetMapResolution(loc.Latitude, _map.ZoomLevel);
}
}
}
}