Question

WPF, Shapes

I have a custom Shape, and try to implement MouseClick and MouseDoubleClick stuff on it.

By eg. I need to open a information window about MyShape OnClick and select it OnDoubleClick.

The stub is the following:

public class MyShape : Shape
{
    public Point Point1, Point2;

    public MyShape() : base() { }

    protected override Geometry DefiningGeometry
    {
        get { return new LineGeometry(Point1, Point2); }
    }

    protected override void OnMouseUp(MouseButtonEventArgs e)
    {
        base.OnMouseUp(e);
        if (e.ClickCount == 1)
        {
            // Open Informational Window
        }
        else if (e.ClickCount == 2)
        {
            // Select Item
        }
    }
}

Every time I doubleclick both // Only do MouseClick and // Only do MouseDoubleClick happens.

Is there any way to avoid this in WPF, .NET 4?

Answer 1

Between first click and second click in double click I think there is a time around 50 and 400 millisecond, So the bellow code is not a best one but do the trick:

bool firstClicked = false;

    protected override void OnMouseUp(MouseButtonEventArgs e)
    {
        base.OnMouseUp(e);
        if (e.ClickCount == 1)
        {
            firstClicked = true;
            Task tsk = new TaskFactory()
                            .StartNew(
                            () => 
                                {
                                    Thread.Sleep(SystemInformation.DoubleClickTime);
                                    if (firstClicked)
                                    {
                                        // if you want to use `e`
                                        // e.Source
                                        // Open Informational Window
                                    }
                                        firstClicked = false;
                                    }
                                        );

                                }

        }
        else if (e.ClickCount == 2)
        {
            firstClicked = false;
            // Select Item
        }
    }