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

		internal override bool SetZOrder(IntPtr handle, IntPtr after_handle, bool top, bool bottom) {
			Hwnd	hwnd = Hwnd.ObjectFromHandle(handle);

			if (!hwnd.mapped) {
				return false;
			}

			if (top) {
				lock (XlibLock) {
					XRaiseWindow(DisplayHandle, hwnd.whole_window);
				}
				return true;
			} else if (!bottom) {
				Hwnd	after_hwnd = null;

				if (after_handle != IntPtr.Zero) {
					after_hwnd = Hwnd.ObjectFromHandle(after_handle);
				}

				XWindowChanges	values = new XWindowChanges();

				if (after_hwnd == null) {
					// Work around metacity 'issues'
					int[]	atoms;

					atoms = new int[2];
					atoms[0] = unixtime();
					XChangeProperty(DisplayHandle, hwnd.whole_window, _NET_WM_USER_TIME, (IntPtr)Atom.XA_CARDINAL, 32, PropertyMode.Replace, atoms, 1);

					XRaiseWindow(DisplayHandle, hwnd.whole_window);
					SendNetWMMessage(hwnd.whole_window, _NET_ACTIVE_WINDOW, (IntPtr)1, IntPtr.Zero, IntPtr.Zero);
					return true;
					//throw new ArgumentNullException("after_handle", "Need sibling to adjust z-order");
				}

				values.sibling = after_hwnd.whole_window;
				values.stack_mode = StackMode.Below;

				lock (XlibLock) {
					XConfigureWindow(DisplayHandle, hwnd.whole_window, ChangeWindowFlags.CWStackMode | ChangeWindowFlags.CWSibling, ref values);
				}
			} else {
				// Bottom
				lock (XlibLock) {
					XLowerWindow(DisplayHandle, hwnd.whole_window);
				}
				return true;
			}
			return false;
		}