//Start a new sketch
void Map_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (sketch != null)
{
return;
}
//Mark the event arg as handled so the map won't treat the action as a pan action
e.Handled = true;
//Get the map point (first point of the sketch)
client.Map map = sender as client.Map;
client.Geometry.MapPoint mapPoint = map.ScreenToMap(e.GetPosition(map));
//Create the geometry (polyline) of the sketch and add the first point to it
client.Geometry.Polyline pl = new client.Geometry.Polyline();
pl.SpatialReference = mapPoint.SpatialReference;
pl.Paths.Add(new client.Geometry.PointCollection());
pl.Paths[0].Add(mapPoint);
//Create the sketch graphic with the geometry and the symbol
sketch = new client.Graphic();
sketch.Symbol = new SimpleLineSymbol()
{
Color = new SolidColorBrush(SelectedColor),
Width = selectedWidth
};
sketch.Geometry = pl;
sketch.Geometry.SpatialReference = _mapWidget.Map.SpatialReference;
//Add the sketch graphic to the layer
sketchLayer.Graphics.Add(sketch);
}
//Add a temporary graphic to trace user's mouse movement
void map_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
//Do nothing if user hasn't added the first point
if (sketchGeometry.Paths[0].Count == 0)
{
return;
}
//Update the second point of the feedback layer with the current map point
client.Map map = MapWidget.Map;
(feedBackLyr.Graphics.First().Geometry as Polyline).Paths[0][1] = map.ScreenToMap(e.GetPosition(map));
}
//For each move, get the map point and add it as a vertex of the polyline
void Map_MouseMove(object sender, MouseEventArgs e)
{
if (sketch == null)
{
return;
}
//Get the map point
client.Map map = sender as client.Map;
client.Geometry.MapPoint mapPoint = map.ScreenToMap(e.GetPosition(map));
//Add the map point to the sketch
client.Geometry.Polyline polyline = sketch.Geometry as client.Geometry.Polyline;
polyline.Paths[0].Add(mapPoint);
}
