示例#1
0
BOOL GdiplusUtilities::GetRoundRectGraphicsPath(Gdiplus::GraphicsPath& p, 
			int x, int y, int width, int height, int radius, RectangleCorners corners)
{
	int xw = x + width;
	int yh = y + height;
	int xwr = xw - radius;
	int yhr = yh - radius;
	int xr = x + radius;
	int yr = y + radius;
	int r2 = radius * 2;
	int xwr2 = xw - r2;
	int yhr2 = yh - r2;

	p.StartFigure();

	//Top Left Corner
	if ((TopLeft & corners)	== TopLeft)
	{
		p.AddArc(x, y, r2, r2, 180, 90);
	}
	else
	{
		p.AddLine(x, yr, x, y);
		p.AddLine(x, y, xr, y);
	}

	//Top Edge
	p.AddLine(xr, y, xwr, y);

	//Top Right Corner
	if ((TopRight & corners)
		== TopRight)
	{
		p.AddArc(xwr2, y, r2, r2, 270, 90);
	}
	else
	{
		p.AddLine(xwr, y, xw, y);
		p.AddLine(xw, y, xw, yr);
	}

	//Right Edge
	p.AddLine(xw, yr, xw, yhr);

	//Bottom Right Corner
	if ((BottomRight & corners)
		== BottomRight)
	{
		p.AddArc(xwr2, yhr2, r2, r2, 0, 90);
	}
	else
	{
		p.AddLine(xw, yhr, xw, yh);
		p.AddLine(xw, yh, xwr, yh);
	}

	//Bottom Edge
	p.AddLine(xwr, yh, xr, yh);

	//Bottom Left Corner
	if ((BottomLeft & corners)
		== BottomLeft)
	{
		p.AddArc(x, yhr2, r2, r2, 90, 90);
	}
	else
	{
		p.AddLine(xr, yh, x, yh);
		p.AddLine(x, yh, x, yhr);
	}

	//Left Edge
	p.AddLine(x, yhr, x, yr);

	p.CloseFigure();
	return TRUE;
}