问装饰器命中测试/ MouseDown事件

EN

class myAdorner : Adorner
{
    public myAdorner(UIElement element)
        : base(element)
    {
        this.MouseDown += new System.Windows.Input.MouseButtonEventHandler(myAdorner_MouseDown);
    }


    void myAdorner_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        MessageBox.Show("ok");
    }


    // Draws two rectangles: one in the upper-left and another one in the lower-right corner
    protected override void OnRender(System.Windows.Media.DrawingContext drawingContext)
    {
        Size size = this.AdornedElement.RenderSize;

        Rect r1 = new Rect(0.5, 0.5, 20, 20);
        Rect r4 = new Rect(size.Width - 20.5, size.Height - 20.5, 20, 20);


        SolidColorBrush brush = new SolidColorBrush(Colors.AliceBlue);
        Pen pen = new Pen(Brushes.Black, 1);

        drawingContext.DrawRectangle(brush, pen, r1);
        drawingContext.DrawRectangle(brush, pen, r4);
    }
}