public override bool IsIn(IDrawArea pane, ScreenRect sr)
{
var s1 = GetScreenPos(pane);
return(sr.IsIn(s1));
}
/// <summary>
/// In start point or end point
/// </summary>
/// <param name="pane"></param>
/// <param name="sr"></param>
/// <returns></returns>
public override bool IsIn(IDrawArea pane, ScreenRect sr)
{
return(sr.IsIn(_p0) | sr.IsIn(_p1));
}