[nautilus-actions] NactIMimetypesTab: enable the page if a context is available

[Pierre Wieser <pwieser src gnome org>]

commit 5a8bcf48bb8258614a07b8d5b4f27de5b77de604
Author: Pierre Wieser <pwieser trychlos org>
Date:   Wed Feb 15 22:15:26 2012 +0100

    NactIMimetypesTab: enable the page if a context is available

 ChangeLog                      |    1 +
 src/nact/nact-imimetypes-tab.c |   15 ++++++++++++---
 2 files changed, 13 insertions(+), 3 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 68545ad..73400e5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2012-02-15 Pierre Wieser <pwieser trychlos org>
 
+	* src/nact/nact-imimetypes-tab.c (on_main_selection_changed):
 	* src/nact/nact-ifolders-tab.c (on_main_selection_changed):
 	* src/nact/nact-icapabilities-tab.c (on_main_selection_changed):
 	* src/nact/nact-ibasenames-tab.c (on_main_selection_changed):
diff --git a/src/nact/nact-imimetypes-tab.c b/src/nact/nact-imimetypes-tab.c
index 3b95c19..85d4bd7 100644
--- a/src/nact/nact-imimetypes-tab.c
+++ b/src/nact/nact-imimetypes-tab.c
@@ -59,7 +59,7 @@ static void    interface_base_finalize( NactIMimetypesTabInterface *klass );
 static void    on_base_initialize_gtk( NactIMimetypesTab *instance, GtkWindow *toplevel, gpointer user_data );
 static void    on_base_initialize_window( NactIMimetypesTab *instance, gpointer user_data );
 
-static void    on_main_selection_changed( BaseWindow *window, GList *selected_items, gpointer user_data );
+static void    on_main_selection_changed( NactIMimetypesTab *instance, GList *selected_items, gpointer user_data );
 
 static GSList *get_mimetypes( void *context );
 static void    set_mimetypes( void *context, GSList *filters );
@@ -232,9 +232,18 @@ on_base_initialize_window( NactIMimetypesTab *instance, void *user_data )
 }
 
 static void
-on_main_selection_changed( BaseWindow *window, GList *selected_items, gpointer user_data )
+on_main_selection_changed( NactIMimetypesTab *instance, GList *selected_items, gpointer user_data )
 {
-	/* nothing to do here */
+	NAIContext *context;
+	gboolean editable;
+	gboolean enable_tab;
+
+	g_object_get( G_OBJECT( instance ),
+			MAIN_PROP_CONTEXT, &context, MAIN_PROP_EDITABLE, &editable,
+			NULL );
+
+	enable_tab = ( context != NULL );
+	nact_main_tab_enable_page( NACT_MAIN_WINDOW( instance ), TAB_MIMETYPES, enable_tab );
 }
 
 static GSList *