From 7c2a32fec6774f07fa4149526b0e10e87e52f456 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Wed, 8 Apr 2015 18:58:59 -0400
Subject: [PATCH] Implemented the parent updating logic on GTK+.

---
 new/container_unix.c  |  6 ++++++
 new/newcontrol_unix.c | 13 ++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/new/container_unix.c b/new/container_unix.c
index e3f8da3..d9d6996 100644
--- a/new/container_unix.c
+++ b/new/container_unix.c
@@ -102,3 +102,9 @@ GtkWidget *newContainer(void)
 {
 	return GTK_WIDGET(g_object_new(uiContainerType, NULL));
 }
+
+void updateParent(uintptr_t parent)
+{
+	if (parent != 0)
+		gtk_widget_queue_resize(GTK_WIDGET(parent));
+}
diff --git a/new/newcontrol_unix.c b/new/newcontrol_unix.c
index c883a5a..0f050be 100644
--- a/new/newcontrol_unix.c
+++ b/new/newcontrol_unix.c
@@ -9,6 +9,7 @@ struct uiSingleWidgetControl {
 	GtkWidget *scrolledWindow;
 	GtkWidget *immediate;		// the widget that is added to the parent container; either widget or scrolledWindow
 	void *data;
+	uintptr_t parent;
 };
 
 #define S(c) ((uiSingleWidgetControl *) (c))
@@ -25,7 +26,16 @@ static uintptr_t singleHandle(uiControl *c)
 
 static void singleSetParent(uiControl *c, uintptr_t parent)
 {
-	gtk_container_add(GTK_CONTAINER(parent), S(c)->immediate);
+	uiSingleWidgetControl *s = S(c);
+	uintptr_t oldparent;
+
+	oldparent = s->parent;
+	s->parent = parent;
+	if (oldparent != 0)
+		gtk_container_remove(GTK_CONTAINER(oldparent), s->immediate);
+	gtk_container_add(GTK_CONTAINER(s->parent), s->immediate);
+	updateParent(oldparent);
+	updateParent(s->parent);
 }
 
 static uiSize singlePreferredSize(uiControl *c, uiSizing *d)
@@ -91,6 +101,7 @@ uiControl *uiUnixNewControl(GType type, gboolean inScrolledWindow, gboolean scro
 	// with this:
 	// - end user call works (shoudn't be in any container)
 	// - call in uiContainer works (both refs freed)
+	// this also ensures singleSetParent() works properly when changing parents
 	g_object_ref_sink(c->immediate);
 	// and let's free the uiSingleWidgetControl with it
 	g_signal_connect(c->immediate, "destroy", G_CALLBACK(onDestroy), c);