Move the objc object release GFunc into gtkhelpers

3 files changed, 14 insertions, 7 deletions

diff --git a/tikzit/src/gtk/ToolBox.m b/tikzit/src/gtk/ToolBox.m
index c92311e..af753d4 100644
--- a/tikzit/src/gtk/ToolBox.m
+++ b/tikzit/src/gtk/ToolBox.m
@@ -25,7 +25,6 @@
 #import "tztoolpalette.h"
 
 static void tool_button_toggled_cb (GtkWidget *widget, ToolBox *toolBox);
-static void unretain (gpointer data);
 
 #define TOOL_DATA_KEY  "tikzit-tool"
 
@@ -88,7 +87,7 @@ static void unretain (gpointer data);
                     G_OBJECT(item),
                     TOOL_DATA_KEY,
                     [tool retain],
-                    unretain);
+                    release_obj);
 
             g_signal_connect (item, "toggled",
                               G_CALLBACK (tool_button_toggled_cb),
@@ -271,9 +270,4 @@ static void tool_button_toggled_cb (GtkWidget *widget, ToolBox *toolBox) {
     }
 }
 
-static void unretain (gpointer data) {
-    id obj = (id)data;
-    [obj release];
-}
-
 // vim:ft=objc:ts=8:et:sts=4:sw=4
diff --git a/tikzit/src/gtk/gtkhelpers.h b/tikzit/src/gtk/gtkhelpers.h
index 81a4d93..59b69bc 100644
--- a/tikzit/src/gtk/gtkhelpers.h
+++ b/tikzit/src/gtk/gtkhelpers.h
@@ -24,6 +24,14 @@
 #include <gtk/gtk.h>
 #import <gdk-pixbuf/gdk-pixbuf.h>
 
+/**
+ * Releases the Objective-C object pointed to by data
+ *
+ * Intended for use as a cleanup function in Glib/GObject-based
+ * code.
+ */
+void release_obj (gpointer data);
+
 NSString * gtk_editable_get_string (GtkEditable *editable, gint start, gint end);
 
 GdkRectangle gdk_rectangle_from_ns_rect (NSRect rect);
diff --git a/tikzit/src/gtk/gtkhelpers.m b/tikzit/src/gtk/gtkhelpers.m
index 150af9d..ce02618 100644
--- a/tikzit/src/gtk/gtkhelpers.m
+++ b/tikzit/src/gtk/gtkhelpers.m
@@ -25,6 +25,11 @@
 #import "gtkhelpers.h"
 #import <gdk/gdkkeysyms.h>
 
+void release_obj (gpointer data) {
+    id obj = (id)data;
+    [obj release];
+}
+
 NSString * gtk_editable_get_string (GtkEditable *editable, gint start, gint end)
 {
     gchar *text = gtk_editable_get_chars (editable, start, end);