diff --git a/redo/controls_darwin.go b/redo/controls_darwin.go
index 8d13aaa..0c3442c 100644
--- a/redo/controls_darwin.go
+++ b/redo/controls_darwin.go
@@ -11,8 +11,6 @@ import "C"
 
 type widgetbase struct {
 	id		C.id
-	notnew	bool		// to prevent unparenting a new control
-	floating	bool
 }
 
 func newWidget(id C.id) *widgetbase {
@@ -23,19 +21,17 @@ func newWidget(id C.id) *widgetbase {
 
 // these few methods are embedded by all the various Controls since they all will do the same thing
 
-func (w *widgetbase) unparent() {
-	if w.notnew {
-		// redrawing the old window handled by C.unparent()
-		C.unparent(w.id)
-		w.floating = true
-	}
+func (w *widgetbase) setParent(parent C.id) {
+	// redrawing the new window handled by C.parent()
+	C.parent(w.id, parent)
 }
 
-func (w *widgetbase) parent(win *window) {
-	// redrawing the new window handled by C.parent()
-	C.parent(w.id, win.id, toBOOL(w.floating))
-	w.floating = false
-	w.notnew = true
+func (w *widgetbase) containerShow() {
+	C.controlSetHidden(w.id, C.NO)
+}
+
+func (w *widgetbase) containerHide() {
+	C.controlSetHidden(w.id, C.YES)
 }
 
 type button struct {
@@ -100,3 +96,7 @@ func (c *checkbox) Checked() bool {
 func (c *checkbox) SetChecked(checked bool) {
 	C.checkboxSetChecked(c.id, toBOOL(checked))
 }
+
+//TODO
+func newTab() Tab{return newButton("tab")}
+func(*button)Append(string,Control){}
diff --git a/redo/controls_darwin.m b/redo/controls_darwin.m
index 85de6c8..4ec42ef 100644
--- a/redo/controls_darwin.m
+++ b/redo/controls_darwin.m
@@ -9,24 +9,14 @@
 #define toNSControl(x) ((NSControl *) (x))
 #define toNSButton(x) ((NSButton *) (x))
 
-void unparent(id control)
-{
-	NSWindow *old;
-
-	[toNSView(control) retain];		// save from being freed when released by the removal selector below
-	old = [toNSView(control) window];
-	[toNSView(control) removeFromSuperview];
-	// redraw since we changed controls
-	windowRedraw((id) old);
-}
-
-void parent(id control, id parentid, BOOL floating)
+void parent(id control, id parentid)
 {
 	[[toNSWindow(parentid) contentView] addSubview:toNSView(control)];
-	if (floating)		// previously unparented
-		[toNSView(control) release];
-	// redraw since we changed controls
-	windowRedraw(parentid);
+}
+
+void controlSetHidden(id control, BOOL hidden)
+{
+	[toNSView(control) setHidden:hidden];
 }
 
 static inline void setStandardControlFont(id control)
diff --git a/redo/objc_darwin.h b/redo/objc_darwin.h
index e69ed71..057b4a0 100644
--- a/redo/objc_darwin.h
+++ b/redo/objc_darwin.h
@@ -31,8 +31,8 @@ extern void windowClose(id);
 extern void windowRedraw(id);
 
 /* controls_darwin.m */
-extern void unparent(id);
-extern void parent(id, id, BOOL);
+extern void parent(id, id);
+extern void controlSetHidden(id, BOOL);
 extern id newButton(void);
 extern void buttonSetDelegate(id, void *);
 extern const char *buttonText(id);
diff --git a/redo/sizing_darwin.go b/redo/sizing_darwin.go
index c23a75c..8b141c2 100644
--- a/redo/sizing_darwin.go
+++ b/redo/sizing_darwin.go
@@ -35,11 +35,11 @@ func (w *window) beginResize() (d *sizing) {
 	return d
 }
 
-func (w *window) endResize(d *sizing) {
+func (c *container) endResize(d *sizing) {
 	// redraw
 }
 
-func (w *window) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
+func (c *container) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
 	for _, a := range allocations {
 		// winheight - y because (0,0) is the bottom-left corner of the window and not the top-left corner
 		// (winheight - y) - height because (x, y) is the bottom-left corner of the control and not the top-left
diff --git a/redo/window_darwin.go b/redo/window_darwin.go
index 859c79a..90679bc 100644
--- a/redo/window_darwin.go
+++ b/redo/window_darwin.go
@@ -13,23 +13,29 @@ import "C"
 type window struct {
 	id		C.id
 
-	child		Control
-
 	closing	*event
 
-	spaced	bool
+	*container
 }
 
-func newWindow(title string, width int, height int) *window {
+type controlParent interface {
+	setParent(C.id)
+}
+
+func newWindow(title string, width int, height int, control Control) *window {
 	id := C.newWindow(C.intptr_t(width), C.intptr_t(height))
 	ctitle := C.CString(title)
 	defer C.free(unsafe.Pointer(ctitle))
 	C.windowSetTitle(id, ctitle)
 	w := &window{
-		id:		id,
-		closing:	newEvent(),
+		id:			id,
+		closing:		newEvent(),
+		container:		new(container),
 	}
+	w.container.beginResize = w.beginResize
 	C.windowSetDelegate(id, unsafe.Pointer(w))
+	w.child = control
+	w.child.setParent(w.id)
 	return w
 }
 
@@ -72,6 +78,6 @@ func windowClosing(xw unsafe.Pointer) C.BOOL {
 //export windowResized
 func windowResized(xw unsafe.Pointer, width C.uintptr_t, height C.uintptr_t) {
 	w := (*window)(unsafe.Pointer(xw))
-	w.doresize(int(width), int(height))
+	w.resize(int(width), int(height))
 	fmt.Printf("new size %d x %d\n", width, height)
 }
diff --git a/redo/window_windows.go b/redo/window_windows.go
index 34e8f93..96a9d5e 100644
--- a/redo/window_windows.go
+++ b/redo/window_windows.go
@@ -12,12 +12,12 @@ import (
 import "C"
 
 type window struct {
-	*container
-
 	hwnd		C.HWND
 	shownbefore	bool
 
 	closing		*event
+
+	*container
 }
 
 const windowclassname = ""