Can I draw different geometry types with a MapTool?

ViktorSafar

I need to draw different geometry types, eg. point and polyline, depending on the state of the CTRL key. I created a MapTool and am overriding HandleKeyDownAsync/HandleKeyUpAsync but it appears the MapTool.SketchType property has no effect once the tool is activated.

 

        public DrawFireTargetMapTool()
        {
            IsSketchTool = true;
            SketchOutputMode = SketchOutputMode.Map;
            SketchType = Module1.SelectedFireGeometryType;       
        }

        protected override Task HandleKeyUpAsync(MapViewKeyEventArgs args)
        {
            if (args.Key == System.Windows.Input.Key.LeftCtrl)
            {
                SketchType = Module1.SelectedFireGeometryType;
            }

            return base.HandleKeyUpAsync(args);
        }

        protected override Task HandleKeyDownAsync(MapViewKeyEventArgs args)
        {
            if (args.Key == System.Windows.Input.Key.LeftCtrl)
            {
                SketchType = Module1.SelectedTargetGeometryType;
            }

            return base.HandleKeyDownAsync(args);
        }

ViktorSafar

It actually works out of the box! I am not sure what I did wrong in the beginning, but changing the SketchType after the tool has been activated indeed has an effect on the geometry being drawn. 

public DrawFireTargetMapTool()
{
	IsSketchTool = true;
	SketchType = SketchGeometryType.Rectangle;
	SketchOutputMode = SketchOutputMode.Map;
}

protected override Task OnToolActivateAsync(bool active)
{
	SketchType = <some other SketchType>;
	return Task.CompletedTask;
}

/// <summary>
/// This is used only to trigger OnToolKeyUp
/// </summary>        
protected override Task HandleKeyUpAsync(MapViewKeyEventArgs args)
{
	args.Handled = true;
	return base.HandleKeyUpAsync(args);
}

protected override void OnToolKeyUp(MapViewKeyEventArgs args)
{
	if (_handledKeys.Contains(args.Key))
	{
		SketchType = <yet another SketchType>;
	}
	else
	{
		base.OnToolKeyUp(args);
	}
}