public override MyGraphic Clone()
{
MyLine me = new MyLine(Left1, Top1, Left2, Top2);
me.isVisible = this.isVisible;
me.drawmode = this.drawmode;
return me;
}
//画线
private void AddLine(Point pt1, Point pt2)
{
if (line != null)
{
canvas1.Children.Remove(line);
line = null;
}
MyLine line1 = new MyLine();
line1.Left1 = pt1.X;
line1.Top1 = pt1.Y;
line1.Left2 = pt2.X;
line1.Top2 = pt2.Y;
line1.drawmode = new GeometryMode(brush, pen);
compositeGraphic.Add(line1, 0, 0);
du_refresh();
canvas1.ReleaseMouseCapture();
}