Ok it kind of works now

backends/x/event.go

@@ -146,6 +146,8 @@ func (window *window) handleKeyPress (
 				child.HandleUnfocus()
 			}
 		}
+	} else if key == input.KeyEscape && window.shy {
+		window.Close()
 	} else if child, ok := window.child.(tomo.KeyboardTarget); ok {
 		child.HandleKeyDown(key, modifiers)
 	}
@@ -193,7 +195,14 @@ func (window *window) handleButtonPress (
 	if window.hasModal     { return }
 	
 	buttonEvent := *event.ButtonPressEvent
-	if buttonEvent.Detail >= 4 && buttonEvent.Detail <= 7 {
+	
+	insideWindow := image.Pt (
+		int(buttonEvent.EventX),
+		int(buttonEvent.EventY)).In(window.metrics.bounds)
+		
+	if !insideWindow && window.shy {
+		window.Close()
+	} else if buttonEvent.Detail >= 4 && buttonEvent.Detail <= 7 {
 		if child, ok := window.child.(tomo.ScrollTarget); ok {
 			sum := scrollSum { }
 			sum.add(buttonEvent.Detail, window, buttonEvent.State)

backends/x/window.go

@@ -30,6 +30,7 @@ type window struct {
 
 	modalParent *window
 	hasModal    bool
+	shy         bool
 
 	theme  tomo.Theme
 	config tomo.Config
@@ -286,10 +287,7 @@ func (window *window) NewMenu (bounds image.Rectangle) (tomo.MenuWindow, error)
 		window.backend.connection,
 		menu.xWindow.Id,
 		window.xWindow.Id)
-	ewmh.WmStateSet (
+	menu.setType("POPUP_MENU")
-		window.backend.connection,
-		menu.xWindow.Id,
-		[]string { "_NET_WM_STATE_SKIP_TASKBAR" })
 	menu.inheritProperties(window)
 	return menuWindow { window: menu }, err
 }
@@ -310,7 +308,9 @@ func (window mainWindow) NewPanel (bounds image.Rectangle) (tomo.Window, error)
 }
 
 func (window menuWindow) Pin () {
-	// TODO
+	// TODO take off override redirect
+	// TODO turn off shy
+	// TODO set window type to MENU
 }
 
 func (window *window) inheritProperties (parent *window) {

examples/popups/main.go

@@ -65,6 +65,17 @@ func run () {
 	})
 	container.Adopt(errorButton, false)
 
+	menuButton := elements.NewButton("menu")
+	menuButton.OnClick (func () {
+		menu, err := window.NewMenu (
+			tomo.Bounds(0, 0, 64, 64).
+			Add(menuButton.Bounds().Min))
+		if err != nil { println(err.Error()) }
+		menu.Adopt(elements.NewLabel("I'm a shy window...", true))
+		menu.Show()
+	})
+	container.Adopt(menuButton, false)
+
 	cancelButton := elements.NewButton("No thank you.")
 	cancelButton.OnClick(tomo.Stop)
 	container.Adopt(cancelButton, false)