diff --git a/new/newcontrol_unix.c b/new/newcontrol_unix.c
index db7652b..c3fad42 100644
--- a/new/newcontrol_unix.c
+++ b/new/newcontrol_unix.c
@@ -87,8 +87,10 @@ static void singleShow(uiControl *c)
 	singleWidget *s = (singleWidget *) (c->internal);
 
 	s->userHid = FALSE;
-	if (!s->containerHid)
+	if (!s->containerHid) {
 		gtk_widget_show_all(s->immediate);
+		updateParent(s->parent);
+	}
 }
 
 static void singleHide(uiControl *c)
@@ -97,6 +99,7 @@ static void singleHide(uiControl *c)
 
 	s->userHid = TRUE;
 	gtk_widget_hide(s->immediate);
+	updateParent(s->parent);
 }
 
 static void singleContainerShow(uiControl *c)
@@ -104,8 +107,10 @@ static void singleContainerShow(uiControl *c)
 	singleWidget *s = (singleWidget *) (c->internal);
 
 	s->containerHid = FALSE;
-	if (!s->userHid)
+	if (!s->userHid) {
 		gtk_widget_show_all(s->immediate);
+		updateParent(s->parent);
+	}
 }
 
 static void singleContainerHide(uiControl *c)
@@ -114,6 +119,7 @@ static void singleContainerHide(uiControl *c)
 
 	s->containerHid = TRUE;
 	gtk_widget_hide(s->immediate);
+	updateParent(s->parent);
 }
 
 static void singleEnable(uiControl *c)
diff --git a/new/stack.c b/new/stack.c
index 4c817d2..3899f83 100644
--- a/new/stack.c
+++ b/new/stack.c
@@ -97,6 +97,8 @@ static void stackPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intma
 	maxStretchyWidth = 0;
 	maxStretchyHeight = 0;
 	for (i = 0; i < s->len; i++) {
+		if (!uiControlVisible(s->controls[i].c))
+			continue;
 		uiControlPreferredSize(s->controls[i].c, d, &preferredWidth, &preferredHeight);
 		if (s->controls[i].stretchy) {
 			nStretchy++;
@@ -157,6 +159,8 @@ static void stackResize(uiControl *c, intmax_t x, intmax_t y, intmax_t width, in
 	stretchyht = height;
 	nStretchy = 0;
 	for (i = 0; i < s->len; i++) {
+		if (!uiControlVisible(s->controls[i].c))
+			continue;
 		if (s->controls[i].stretchy) {
 			nStretchy++;
 			continue;
@@ -180,14 +184,19 @@ static void stackResize(uiControl *c, intmax_t x, intmax_t y, intmax_t width, in
 			stretchyht /= nStretchy;
 		else
 			stretchywid /= nStretchy;
-	for (i = 0; i < s->len; i++)
+	for (i = 0; i < s->len; i++) {
+		if (!uiControlVisible(s->controls[i].c))
+			continue;
 		if (s->controls[i].stretchy) {
 			s->controls[i].width = stretchywid;
 			s->controls[i].height = stretchyht;
 		}
+	}
 
 	// 3) now we can position controls
 	for (i = 0; i < s->len; i++) {
+		if (!uiControlVisible(s->controls[i].c))
+			continue;
 		uiControlResize(s->controls[i].c, x, y, s->controls[i].width, s->controls[i].height, d);
 		if (s->vertical)
 			y += s->controls[i].height + ypadding;