System.Windows.Forms.XplatUIX11.DrawReversibleFrame C# (CSharp) Method

		internal override void DrawReversibleFrame (Rectangle rectangle, Color backColor, FrameStyle style)
		{
			if (backColor.GetBrightness() < 0.5)
				backColor = Color.FromArgb(255 - backColor.R, 255 - backColor.G, 255 - backColor.B);

			IntPtr gc = GetReversibleScreenGC (backColor);

			if (rectangle.Width < 0) {
				rectangle.X += rectangle.Width;
				rectangle.Width = -rectangle.Width;
			}
			if (rectangle.Height < 0) {
				rectangle.Y += rectangle.Height;
				rectangle.Height = -rectangle.Height;
			}

			int line_width = 1;
			GCLineStyle line_style = GCLineStyle.LineSolid;
			GCCapStyle cap_style = GCCapStyle.CapButt;
			GCJoinStyle join_style = GCJoinStyle.JoinMiter;

			switch (style) {
			case FrameStyle.Dashed:
				line_style = GCLineStyle.LineOnOffDash;
				break;
			case FrameStyle.Thick:
				line_width = 2;
				break;
			}

			XSetLineAttributes (DisplayHandle, gc, line_width, line_style, cap_style, join_style);

			XDrawRectangle(DisplayHandle, RootWindow, gc, rectangle.Left, rectangle.Top, rectangle.Width, rectangle.Height);

			XFreeGC(DisplayHandle, gc);
		}