public void Redraw()
{
if (_cropTool.Height <= 0 && _cropTool.Width <= 0)
{
ShowThumbs(false);
return;
}
BottomMiddle.Redraw(_cropTool.TopLeftX + _cropTool.Width / 2, _cropTool.TopLeftY + _cropTool.Height);
LeftMiddle.Redraw(_cropTool.TopLeftX, _cropTool.TopLeftY + _cropTool.Height / 2);
TopMiddle.Redraw(_cropTool.TopLeftX + _cropTool.Width / 2, _cropTool.TopLeftY);
RightMiddle.Redraw(_cropTool.TopLeftX + _cropTool.Width, _cropTool.TopLeftY + _cropTool.Height / 2);
TopLeft.Redraw(_cropTool.TopLeftX, _cropTool.TopLeftY);
TopRight.Redraw(_cropTool.TopLeftX + _cropTool.Width, _cropTool.TopLeftY);
BottomLeft.Redraw(_cropTool.TopLeftX, _cropTool.TopLeftY + _cropTool.Height);
BottomRight.Redraw(_cropTool.TopLeftX + _cropTool.Width, _cropTool.TopLeftY + _cropTool.Height);
ShowThumbs(true);
}