// ------------------------------
// private
// ------------------------------
private Matrix CreateMatrix()
{
var bounds = _Bounds;
var center = RectUtil.GetCenterF(bounds);
var ret = default(Matrix);
if (_isFlippedHorizontal && _isFlippedVertical)
{
ret = new Matrix(
-1, 0, 0, -1, bounds.Left * 2 + bounds.Width - 1, bounds.Top * 2 + bounds.Height - 1
);
if (_angle != 0)
{
ret.RotateAt(_angle, center);
}
}
else if (_isFlippedHorizontal)
{
ret = new Matrix(-1, 0, 0, 1, bounds.Left * 2 + bounds.Width - 1, 0);
if (_angle != 0)
{
ret.RotateAt(_angle, center);
}
}
else if (_isFlippedVertical)
{
ret = new Matrix(1, 0, 0, -1, 0, bounds.Top * 2 + bounds.Height - 1);
if (_angle != 0)
{
ret.RotateAt(_angle, center);
}
}
else if (_angle != 0)
{
ret = new Matrix();
ret.RotateAt(_angle, center);
}
return(ret);
}
private Rectangle GetBoundsForPathCreation()
{
var bounds = _Bounds;
var ret = Rectangle.Empty;
if (_angle == 0)
{
ret = new Rectangle(bounds.Left, bounds.Top, bounds.Width - 1, bounds.Height - 1);
}
else if (_angle == 90)
{
var center = RectUtil.GetCenterF(bounds);
ret = new Rectangle(
(int)Math.Round(center.X - (float)bounds.Height / 2),
(int)Math.Round(center.Y - (float)bounds.Width / 2) + 1,
bounds.Height - 1,
bounds.Width - 1
);
}
else if (_angle == 180)
{
ret = new Rectangle(bounds.Left + 1, bounds.Top + 1, bounds.Width - 1, bounds.Height - 1);
}
else if (_angle == 270)
{
var center = RectUtil.GetCenterF(bounds);
ret = new Rectangle(
(int)Math.Round(center.X - (float)bounds.Height / 2) + 1,
(int)Math.Round(center.Y - (float)bounds.Width / 2),
bounds.Height - 1,
bounds.Width - 1
);
}
return(ret);
}
// === AbstractPathBoundingNode ==========
public void Rotate(float rot)
{
Contract.Requires(rot == 90 || rot == 180 || rot == 270);
if (_isFlippedHorizontal ^ _isFlippedVertical)
{
if (rot == 90)
{
rot = 270;
}
else if (rot == 270)
{
rot = 90;
}
}
_angle = (_angle + rot) % 360;
if (rot == 90 || rot == 270)
{
var bounds = _Bounds;
var center = RectUtil.GetCenterF(bounds);
_Bounds = new Rectangle(
(int)Math.Round(center.X - (float)bounds.Height / 2),
(int)Math.Round(center.Y - (float)bounds.Width / 2),
bounds.Height,
bounds.Width
);
}
else if (rot == 180)
{
_ResourceCache.DisposeResource(PathResourceKey);
_ResourceCache.DisposeResource(DrawPathResourceKey);
_ResourceCache.DisposeResource(OutlinePathResourceKey);
InvalidatePaint();
}
}