private Point GetRectangleCenter(Map map, MapDecorationAnchor anchor)
{
var coords = GetRectanglePoints(map, anchor);
return(new Point((coords[0].X + coords[1].X) / 2.0,
(coords[0].Y + coords[2].Y) / 2.0));
}
private static Coordinate[] GetRectanglePoints(Map map, MapDecorationAnchor anchor)
{
var env = map.Envelope;
env.ExpandBy(-env.Width * 0.05);
var coords = new Coordinate[5];
Coordinate tl = null;
switch (anchor)
{
case MapDecorationAnchor.LeftTop:
tl = env.TopLeft();
break;
case MapDecorationAnchor.LeftCenter:
tl = new Coordinate(env.MinX, env.MaxY - env.Height * 0.375);
break;
case MapDecorationAnchor.LeftBottom:
tl = new Coordinate(env.MinX, env.MinY + env.Height * 0.25);
break;
case MapDecorationAnchor.CenterTop:
tl = new Coordinate(env.Centre.X - env.Width * 0.125, env.MaxY);
break;
case MapDecorationAnchor.CenterBottom:
tl = new Coordinate(env.Centre.X - env.Width * 0.125, env.MinY + env.Height * 0.25);
break;
case MapDecorationAnchor.RightTop:
tl = new Coordinate(env.MaxX - env.Width * 0.25, env.MaxY);
break;
case MapDecorationAnchor.RightCenter:
tl = new Coordinate(env.MaxX - env.Width * 0.25, env.MaxY - env.Height * 0.375);
break;
case MapDecorationAnchor.RightBottom:
tl = new Coordinate(env.MaxX - env.Width * 0.25, env.MinY + env.Height * 0.25);
break;
default:
tl = new Coordinate(env.Centre.X - env.Width * 0.125, env.Centre.Y + env.Height * 0.125);
break;
}
coords[0] = tl;
coords[1] = new Coordinate(tl.X + env.Width * 0.25, coords[0].Y);
coords[2] = new Coordinate(coords[1].X, tl.Y - env.Height * 0.25);
coords[3] = new Coordinate(coords[0].X, coords[2].Y);
coords[4] = tl;
return(coords);
}
