diff --git a/redo/window.go b/redo/window.go
index 2bb3784..143a875 100644
--- a/redo/window.go
+++ b/redo/window.go
@@ -34,3 +34,17 @@ type Window interface {
 func NewWindow(title string, width int, height int) Window {
 	return newWindow(title, width, height)
 }
+
+// everything below is kept here because they're the same on all platforms
+// TODO move event stuff here and make windowbase
+
+func (w *window) SetControl(control Control) {
+	if w.child != nil {		// unparent existing control
+		w.child.unparent()
+	}
+	control.unparent()
+	control.parent(w)
+	w.child = control
+	// TODO trigger a resize to let the new control actually be shown
+	// TODO do the same with control's old parent, if any
+}
diff --git a/redo/window_darwin.go b/redo/window_darwin.go
index 9d70b1d..859c79a 100644
--- a/redo/window_darwin.go
+++ b/redo/window_darwin.go
@@ -33,15 +33,6 @@ func newWindow(title string, width int, height int) *window {
 	return w
 }
 
-func (w *window) SetControl(control Control) {
-	if w.child != nil {		// unparent existing control
-		w.child.unparent()
-	}
-	control.unparent()
-	control.parent(w)
-	w.child = control
-}
-
 func (w *window) Title() string {
 	return C.GoString(C.windowTitle(w.id))
 }
diff --git a/redo/window_unix.go b/redo/window_unix.go
index 4b2d0d2..26675e7 100644
--- a/redo/window_unix.go
+++ b/redo/window_unix.go
@@ -66,15 +66,6 @@ func newWindow(title string, width int, height int) *window {
 	return w
 }
 
-func (w *window) SetControl(control Control) {
-	if w.child != nil {		// unparent existing control
-		w.child.unparent()
-	}
-	control.unparent()
-	control.parent(w)
-	w.child = control
-}
-
 func (w *window) Title() string {
 	return fromgstr(C.gtk_window_get_title(w.window))
 }
diff --git a/redo/window_windows.go b/redo/window_windows.go
index e2a0973..01bc751 100644
--- a/redo/window_windows.go
+++ b/redo/window_windows.go
@@ -47,15 +47,6 @@ func newWindow(title string, width int, height int) *window {
 	return w
 }
 
-func (w *window) SetControl(control Control) {
-	if w.child != nil {		// unparent existing control
-		w.child.unparent()
-	}
-	control.unparent()
-	control.parent(w)
-	w.child = control
-}
-
 func (w *window) Title() string {
 	return getWindowText(w.hwnd)
 }