diff --git a/redo/unix/bin.c b/redo/unix/bin.c
deleted file mode 100644
index ddb3470d..00000000
--- a/redo/unix/bin.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// 30 june 2015
-#include "uipriv_unix.h"
-
-// This is a uiControl wrapper a la GtkBin.
-// It serves the function of tabPage on Windows: it allows uiWindow and uiTab to give their children a real uiControl as a parent while not screwing with the internal GtkWidget structure of those uiControls.
-// It also provides margins.
-
-struct bin {
-	uiControl c;
-	GtkWidget *widget;
-	GtkContainer *container;
-	GtkBox *box;		// GtkBin is abstract and none of the implementations seem adequate (GtkFrame is the closest but eh)
-	uiControl *child;
-	int margined;
-};
-
-uiDefineControlType(bin, binType, struct bin)
-
-static uintptr_t binHandle(uiControl *c)
-{
-	struct bin *b = (struct bin *) c;
-
-	return (uintptr_t) (b->widget);
-}
-
-uiControl *newBin(void)
-{
-	struct bin *b;
-
-	b = (struct bin *) uiNewControl(binType());
-
-	b->widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
-	b->container = GTK_CONTAINER(b->widget);
-	b->box = GTK_BOX(b->widget);
-	uiUnixMakeSingleWidgetControl(uiControl(b), b->widget);
-
-	// a uiBox is theoretically used in a context where this shouldn't be necessary but because of uiWindow we'll do it anyway
-	gtk_widget_set_hexpand(b->widget, TRUE);
-	gtk_widget_set_halign(b->widget, GTK_ALIGN_FILL);
-	gtk_widget_set_vexpand(b->widget, TRUE);
-	gtk_widget_set_valign(b->widget, GTK_ALIGN_FILL);
-
-	uiControl(b)->Handle = binHandle;
-
-	return uiControl(b);
-}
-
-void binSetChild(uiControl *c, uiControl *child)
-{
-	struct bin *b = (struct bin *) c;
-	GtkWidget *childWidget;
-
-	if (b->child != NULL)
-		uiControlSetParent(b->child, NULL);
-	b->child = child;
-	if (b->child != NULL) {
-		uiControlSetParent(b->child, uiControl(b));
-		childWidget = GTK_WIDGET(uiControlHandle(b->child));
-		gtk_widget_set_hexpand(childWidget, TRUE);
-		gtk_widget_set_halign(childWidget, GTK_ALIGN_FILL);
-		gtk_widget_set_vexpand(childWidget, TRUE);
-		gtk_widget_set_valign(childWidget, GTK_ALIGN_FILL);
-	}
-}
-
-int binMargined(uiControl *c)
-{
-	struct bin *b = (struct bin *) c;
-
-	return b->margined;
-}
-
-void binSetMargined(uiControl *c, int margined)
-{
-	struct bin *b = (struct bin *) c;
-
-	b->margined = margined;
-	if (b->margined)
-		gtk_container_set_border_width(b->container, gtkXMargin);
-	else
-		gtk_container_set_border_width(b->container, 0);
-}
diff --git a/redo/unix/container.c b/redo/unix/container.c
deleted file mode 100644
index 892a4bf7..00000000
--- a/redo/unix/container.c
+++ /dev/null
@@ -1,146 +0,0 @@
-// 28 april 2015
-#include "uipriv_unix.h"
-
-#define containerWidgetType (containerWidget_get_type())
-#define containerWidget(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), containerWidgetType, containerWidget))
-#define IscontainerWidget(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), containerWidgetType))
-#define containerWidgetClass(class) (G_TYPE_CHECK_CLASS_CAST((class), containerWidgetType, containerWidgetClass))
-#define IscontainerWidgetClass(class) (G_TYPE_CHECK_CLASS_TYPE((class), containerWidget))
-#define GetcontainerWidgetClass(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), containerWidgetType, containerWidgetClass))
-
-typedef struct containerWidget containerWidget;
-typedef struct containerWidgetClass containerWidgetClass;
-
-struct containerWidget {
-	GtkContainer parent_instance;
-	uiControl *c;
-	GPtrArray *widgets;		// for for_each()/for_all()
-};
-
-struct containerWidgetClass {
-	GtkContainerClass parent_class;
-};
-
-G_DEFINE_TYPE(containerWidget, containerWidget, GTK_TYPE_CONTAINER)
-
-static void containerWidget_init(containerWidget *c)
-{
-	c->widgets = g_ptr_array_new();
-	gtk_widget_set_has_window(GTK_WIDGET(c), FALSE);
-}
-
-static void containerWidget_dispose(GObject *obj)
-{
-	G_OBJECT_CLASS(containerWidget_parent_class)->dispose(obj);
-}
-
-static void containerWidget_finalize(GObject *obj)
-{
-	containerWidget *c = containerWidget(obj);
-
-	g_ptr_array_unref(c->widgets);
-	G_OBJECT_CLASS(containerWidget_parent_class)->finalize(obj);
-}
-
-static void containerWidget_add(GtkContainer *container, GtkWidget *widget)
-{
-	containerWidget *c = containerWidget(container);
-
-	gtk_widget_set_parent(widget, GTK_WIDGET(c));
-	g_ptr_array_add(c->widgets, widget);
-}
-
-static void containerWidget_remove(GtkContainer *container, GtkWidget *widget)
-{
-	containerWidget *c = containerWidget(container);
-
-	gtk_widget_unparent(widget);
-	if (g_ptr_array_remove(c->widgets, widget) == FALSE)
-		complain("widget %p not found in containerWidget gtk_container_remove()", widget);
-}
-
-static void containerWidget_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
-{
-	containerWidget *c = containerWidget(widget);
-	uiSizing *d;
-	intmax_t x, y, width, height;
-
-	gtk_widget_set_allocation(GTK_WIDGET(c), allocation);
-	x = allocation->x;
-	y = allocation->y;
-	width = allocation->width;
-	height = allocation->height;
-	d = uiUnixNewSizing();
-	uiControlResize(c->c, x, y, width, height, d);
-	uiFreeSizing(d);
-}
-
-static void containerWidget_get_preferred_height(GtkWidget *widget, gint *minimum, gint *natural)
-{
-	containerWidget *c = containerWidget(widget);
-	intmax_t width, height;
-	uiSizing *d;
-
-	d = uiUnixNewSizing();
-	uiControlPreferredSize(uiControl(c->c), d, &width, &height);
-	uiFreeSizing(d);
-	*minimum = 0;			// allow arbitrary resize
-	*natural = height;
-}
-
-static void containerWidget_get_preferred_width(GtkWidget *widget, gint *minimum, gint *natural)
-{
-	containerWidget *c = containerWidget(widget);
-	intmax_t width, height;
-	uiSizing *d;
-
-	d = uiUnixNewSizing();
-	uiControlPreferredSize(uiControl(c->c), d, &width, &height);
-	uiFreeSizing(d);
-	*minimum = 0;			// allow arbitrary resize
-	*natural = width;
-}
-
-struct forall {
-	GtkCallback callback;
-	gpointer data;
-};
-
-static void doforall(gpointer obj, gpointer data)
-{
-	struct forall *s = (struct forall *) data;
-
-	(*(s->callback))(GTK_WIDGET(obj), s->data);
-}
-
-static void containerWidget_forall(GtkContainer *container, gboolean includeInternals, GtkCallback callback, gpointer data)
-{
-	containerWidget *c = containerWidget(container);
-	struct forall s;
-
-	s.callback = callback;
-	s.data = data;
-	g_ptr_array_foreach(c->widgets, doforall, &s);
-}
-
-static void containerWidget_class_init(containerWidgetClass *class)
-{
-	G_OBJECT_CLASS(class)->dispose = containerWidget_dispose;
-	G_OBJECT_CLASS(class)->finalize = containerWidget_finalize;
-	GTK_WIDGET_CLASS(class)->size_allocate = containerWidget_size_allocate;
-	GTK_WIDGET_CLASS(class)->get_preferred_height = containerWidget_get_preferred_height;
-	GTK_WIDGET_CLASS(class)->get_preferred_width = containerWidget_get_preferred_width;
-	GTK_CONTAINER_CLASS(class)->add = containerWidget_add;
-	GTK_CONTAINER_CLASS(class)->remove = containerWidget_remove;
-	GTK_CONTAINER_CLASS(class)->forall = containerWidget_forall;
-}
-
-uintptr_t uiMakeContainer(uiControl *c)
-{
-	GtkWidget *widget;
-
-	widget = GTK_WIDGET(g_object_new(containerWidgetType, NULL));
-	uiUnixMakeSingleWidgetControl(c, widget);
-	containerWidget(widget)->c = c;
-	return (uintptr_t) widget;
-}
diff --git a/redo/unix/group.c b/redo/unix/group.c
index 058d040f..74d019eb 100644
--- a/redo/unix/group.c
+++ b/redo/unix/group.c
@@ -1,107 +1,99 @@
 // 11 june 2015
 #include "uipriv_unix.h"
 
-struct group {
-	uiGroup g;
+struct uiGroup {
+	uiUnixControl c;
 	GtkWidget *widget;
 	GtkContainer *container;
 	GtkFrame *frame;
 
 	// unfortunately, even though a GtkFrame is a GtkBin, calling gtk_container_set_border_width() on it /includes/ the GtkFrame's label; we don't want tht
-	uiControl *bin;
+	GtkWidget *box;
 	uiControl *child;
 
-	void (*baseCommitDestroy)(uiControl *);
+	int margined;
 };
 
-uiDefineControlType(uiGroup, uiTypeGroup, struct group)
+static void onDestroy(uiGroup *);
 
-static void groupCommitDestroy(uiControl *c)
+uiUnixDefineControlWithOnDestroy(
+	uiGroup,								// type name
+	uiGroupType,							// type function
+	onDestroy(this);						// on destroy
+)
+
+static void onDestroy(uiGroup *g)
 {
-	struct group *g = (struct group *) c;
-
 	if (g->child != NULL) {
-		binSetChild(g->bin, NULL);
+		uiControlSetParent(g->child, NULL);
 		uiControlDestroy(g->child);
 	}
-	uiControlDestroy(g->bin);
-	(*(g->baseCommitDestroy))(uiControl(g));
-}
-
-static uintptr_t groupHandle(uiControl *c)
-{
-	struct group *g = (struct group *) c;
-
-	return (uintptr_t) (g->widget);
+	gtk_widget_destroy(g->box);
 }
 
 static void groupContainerUpdateState(uiControl *c)
 {
-	struct group *g = (struct group *) c;
+	uiGroup *g = uiGroup(c);
 
 	if (g->child != NULL)
 		uiControlUpdateState(g->child);
 }
 
-static char *groupTitle(uiGroup *gg)
+char *uiGroupTitle(uiGroup *g)
 {
-	struct group *g = (struct group *) gg;
-
 	return uiUnixStrdupText(gtk_frame_get_label(g->frame));
 }
 
-static void groupSetTitle(uiGroup *gg, const char *text)
+void uiGroupSetTitle(uiGroup *g, const char *text)
 {
-	struct group *g = (struct group *) gg;
-
 	gtk_frame_set_label(g->frame, text);
 	// changing the text might necessitate a change in the groupbox's size
 	uiControlQueueResize(uiControl(g));
 }
 
-static void groupSetChild(uiGroup *gg, uiControl *child)
+void uiGroupSetChild(uiGroup *g, uiControl *child)
 {
 	struct group *g = (struct group *) gg;
 
-	if (g->child != NULL)
-		binSetChild(g->bin, NULL);
+	if (g->child != NULL) {
+		gtk_container_remove(GTK_CONTAINER(g->bin),
+			GTK_WIDGET(uiControlHandle(g->child)));
+		uiControlSetParent(g->child, NULL);
+	}
 	g->child = child;
 	if (g->child != NULL) {
-		binSetChild(g->bin, g->child);
+		uiControlSetParent(g->child, uiControl(g));
+		gtk_container_add(GTK_CONTAINER(g->bin),
+			GTK_WIDGET(uiControlHandle(g->child)));
 		uiControlQueueResize(g->child);
 	}
 }
 
-static int groupMargined(uiGroup *gg)
+int uiGroupMargined(uiGroup *g)
 {
-	struct group *g = (struct group *) gg;
-
-	return binMargined(g->bin);
+	return g->margined;
 }
 
-// TODO this includes the label
-static void groupSetMargined(uiGroup *gg, int margined)
+void uiGroupSetMargined(uiGroup *g, int margined)
 {
-	struct group *g = (struct group *) gg;
-
-	binSetMargined(g->bin, margined);
+	g->margined = margined;
+	setMargined(GTK_CONTAINER(g->box), g->margined);
 	uiControlQueueResize(uiControl(g));
 }
 
 uiGroup *uiNewGroup(const char *text)
 {
-	struct group *g;
+	uiGroup *g;
 	gfloat yalign;
 	GtkLabel *label;
 	PangoAttribute *bold;
 	PangoAttrList *boldlist;
 
-	g = (struct group *) uiNewControl(uiTypeGroup());
+	g = (uiGroup *) uiNewControl(uiTypeGroup());
 
 	g->widget = gtk_frame_new(text);
 	g->container = GTK_CONTAINER(g->widget);
 	g->frame = GTK_FRAME(g->widget);
-	uiUnixMakeSingleWidgetControl(uiControl(g), g->widget);
 
 	// with GTK+, groupboxes by default have frames and slightly x-offset regular text
 	// they should have no frame and fully left-justified, bold text
@@ -118,22 +110,12 @@ uiGroup *uiNewGroup(const char *text)
 	gtk_label_set_attributes(label, boldlist);
 	pango_attr_list_unref(boldlist);		// thanks baedert in irc.gimp.net/#gtk+
 
-	g->bin = newBin();
-	// can't use uiControlSetParent() because we didn't set the vtable yet
-	gtk_container_add(g->container, GTK_WIDGET(uiControlHandle(g->bin)));
-	// TODO this is a mess
-	gtk_widget_show(GTK_WIDGET(uiControlHandle(g->bin)));
+	g->box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
+	gtk_container_add(g->container, g->box);
+	gtk_widget_show(g->box);
 
-	uiControl(g)->Handle = groupHandle;
-	g->baseCommitDestroy = uiControl(g)->CommitDestroy;
-	uiControl(g)->CommitDestroy = groupCommitDestroy;
+	uiUnixFinishNewControl(g, uiGroup);
 	uiControl(g)->ContainerUpdateState = groupContainerUpdateState;
 
-	uiGroup(g)->Title = groupTitle;
-	uiGroup(g)->SetTitle = groupSetTitle;
-	uiGroup(g)->SetChild = groupSetChild;
-	uiGroup(g)->Margined = groupMargined;
-	uiGroup(g)->SetMargined = groupSetMargined;
-
-	return uiGroup(g);
+	return g;
 }
diff --git a/redo/unix/uipriv_unix.h b/redo/unix/uipriv_unix.h
index d4f6a343..fb2600b5 100644
--- a/redo/unix/uipriv_unix.h
+++ b/redo/unix/uipriv_unix.h
@@ -22,8 +22,5 @@ extern void uninitMenus(void);
 extern void initAlloc(void);
 extern void uninitAlloc(void);
 
-// bin.c
-extern uiControl *newBin(void);
-extern void binSetChild(uiControl *, uiControl *);
-extern int binMargined(uiControl *);
-extern void binSetMargined(uiControl *, int);
+// util.c
+extern void setMargined(GtkContainer *, int);
diff --git a/redo/unix/util.c b/redo/unix/util.c
index 34f5d5d9..260e0ae8 100644
--- a/redo/unix/util.c
+++ b/redo/unix/util.c
@@ -12,19 +12,10 @@ void complain(const char *fmt, ...)
 	g_error("[libui] %s\n", msg);
 }
 
-uiSizing *uiUnixNewSizing(void)
+void setMargined(GtkContainer *c, int margined)
 {
-	uiSizing *d;
-
-	d = uiNew(uiSizing);
-	d->XPadding = gtkXPadding;
-	d->YPadding = gtkYPadding;
-	d->Sys = uiNew(uiSizingSys);
-	return d;
-}
-
-void uiFreeSizing(uiSizing *d)
-{
-	uiFree(d->Sys);
-	uiFree(d);
+	if (b->margined)
+		gtk_container_set_border_width(c, gtkXMargin);
+	else
+		gtk_container_set_border_width(c, 0);
 }