how to have arrow symbol on a line in C#/WPF?

Question

I am new to graphics in C#/WPF application.

I am having a WPF application and using Canvas for drawing various object at the runtime with the help of mouse. I am facing problem in drawing a line with arrow (like below):

(A) ------------>---- (B)

In this arrow sign should be at the 3rd part of the line (and should always point towards the moving mouse). For example if I click mouse at point "A" and move towards point "B" then arrow sign should point towards "B" as shown above.

Any help will be highly appreciated.

Best Regards, Moon

Answer 1

Thanks for all your help and support. I have resolved my problem as below::

private static Shape DrawLinkArrow(Point p1, Point p2)
{
    GeometryGroup lineGroup = new GeometryGroup();
    double theta = Math.Atan2((p2.Y - p1.Y), (p2.X - p1.X)) * 180 / Math.PI;

    PathGeometry pathGeometry = new PathGeometry();
    PathFigure pathFigure = new PathFigure();
    Point p = new Point(p1.X + ((p2.X - p1.X) / 1.35), p1.Y + ((p2.Y - p1.Y) / 1.35));
    pathFigure.StartPoint = p;

    Point lpoint = new Point(p.X + 6, p.Y + 15);
    Point rpoint = new Point(p.X - 6, p.Y + 15);
    LineSegment seg1 = new LineSegment();
    seg1.Point = lpoint;
    pathFigure.Segments.Add(seg1);

    LineSegment seg2 = new LineSegment();
    seg2.Point = rpoint;
    pathFigure.Segments.Add(seg2);

    LineSegment seg3 = new LineSegment();
    seg3.Point = p;
    pathFigure.Segments.Add(seg3);

    pathGeometry.Figures.Add(pathFigure);
    RotateTransform transform = new RotateTransform();
    transform.Angle = theta + 90;
    transform.CenterX = p.X;
    transform.CenterY = p.Y;
    pathGeometry.Transform = transform;
    lineGroup.Children.Add(pathGeometry);

    LineGeometry connectorGeometry = new LineGeometry();
    connectorGeometry.StartPoint = p1;
    connectorGeometry.EndPoint = p2;
    lineGroup.Children.Add(connectorGeometry);
    System.Windows.Shapes.Path path = new System.Windows.Shapes.Path();
    path.Data = lineGroup;
    path.StrokeThickness = 2;
    path.Stroke = path.Fill = Brushes.Black;

    return path;
}

Thanks,

Moon