private void PictureBox_MouseMove(object sender, MouseEventArgs e)
{
if (_operation == 1)
{
if (_regularPolygonCache != null)
{
var center = _regularPolygonCache.Center;
var x = center.X - e.X;
var y = center.Y - e.Y;
_regularPolygonCache.Radius = (float)Math.Sqrt(x * x + y * y);
Redraw();
}
return;
}
if (_primaryOperand != null && e.Button == MouseButtons.Left)
{
switch (_operation)
{
case 2:
_primaryOperand.Move(e.X - _mouseStartPosition.X, e.Y - _mouseStartPosition.Y);
Redraw();
_mouseStartPosition = e.Location;
break;
case 3:
_primaryOperand.Rotate(_mouseStartPosition, (e.X > _mouseStartPosition.X ? 1 : -1) * (Math.PI / 180.0));
Redraw();
break;
case 4:
_primaryOperand.Scale(_mouseStartPosition, e.X > _mouseStartPosition.X ? 1.01 : 0.99);
Redraw();
break;
}
}
}
public void Scale(PointF center, double f)
{
_operand1.Scale(center, f);
_operand2.Scale(center, f);
RecalculateSides();
}