public override void Draw(CustomGraphics g)
{
g.LineColor = NeedsHighlight ? CustomGraphics.SelectColor : CustomGraphics.GrayColor;
setBbox(P1, P2);
var x1 = P1.X;
var y1 = P1.Y;
var x2 = P2.X;
var y2 = P2.Y;
if (x1 < x2 && y1 < y2)
{
g.DrawDashRectangle(x1, y1, x2 - x1, y2 - y1);
}
else if (x1 > x2 && y1 < y2)
{
g.DrawDashRectangle(x2, y1, x1 - x2, y2 - y1);
}
else if (x1 < x2 && y1 > y2)
{
g.DrawDashRectangle(x1, y2, x2 - x1, y1 - y2);
}
else
{
g.DrawDashRectangle(x2, y2, x1 - x2, y1 - y2);
}
}