System.Windows.Forms.XplatUICarbon.AddExpose C# (CSharp) Méthode

		private void AddExpose (Hwnd hwnd, bool client, int x, int y, int width, int height) {
			// Don't waste time
			if ((hwnd == null) || (x > hwnd.Width) || (y > hwnd.Height) || ((x + width) < 0) || ((y + height) < 0)) {
				return;
			}

			// Keep the invalid area as small as needed
			if ((x + width) > hwnd.width) {
				width = hwnd.width - x;
			}

			if ((y + height) > hwnd.height) {
				height = hwnd.height - y;
			}

			if (client) {
				hwnd.AddInvalidArea(x, y, width, height);
				if (!hwnd.expose_pending && hwnd.visible) {
					MSG msg = new MSG ();
					msg.message = Msg.WM_PAINT;
					msg.hwnd = hwnd.Handle;
					EnqueueMessage (msg);
					hwnd.expose_pending = true;
				}
			} else {
				hwnd.AddNcInvalidArea (x, y, width, height);
				if (!hwnd.nc_expose_pending && hwnd.visible) {
					MSG msg = new MSG ();
					Region rgn = new Region (hwnd.Invalid);
					IntPtr hrgn = rgn.GetHrgn (null); // Graphics object isn't needed
					msg.message = Msg.WM_NCPAINT;
					msg.wParam = hrgn == IntPtr.Zero ? (IntPtr)1 : hrgn;
					msg.refobject = rgn;
					msg.hwnd = hwnd.Handle;
					EnqueueMessage (msg);
					hwnd.nc_expose_pending = true;

				}
			}
		}
		#endregion