No changes, just add wxGtkList to ensure g_list_free() is always called.

Add an extremely simple RAII wrapper around GList and use it.

Also add wxGtkTreePathList which also automatically frees its contents to
simplify working with the lists of GtkTreePaths.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68842 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/gtk/private/list.h b/include/wx/gtk/private/list.h
new file mode 100644 (file)
index 0000000..b4e50ab
--- /dev/null
+++ b/include/wx/gtk/private/list.h
@@ -0,0 +1,33 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/gtk/private/list.h
+// Purpose:     wxGtkList class.
+// Author:      Vadim Zeitlin
+// Created:     2011-08-21
+// RCS-ID:      $Id$
+// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_GTK_PRIVATE_LIST_H_
+#define _WX_GTK_PRIVATE_LIST_H_
+
+// ----------------------------------------------------------------------------
+// Convenience class for calling g_list_free() automatically
+// ----------------------------------------------------------------------------
+
+class wxGtkList
+{
+public:
+    explicit wxGtkList(GList* list) : m_list(list) { }
+    ~wxGtkList() { g_list_free(m_list); }
+
+    operator GList *() const { return m_list; }
+    GList * operator->() const { return m_list; }
+
+protected:
+    GList* const m_list;
+
+    wxDECLARE_NO_COPY_CLASS(wxGtkList);
+};
+
+#endif // _WX_GTK_PRIVATE_LIST_H_

diff --git a/src/gtk/button.cpp b/src/gtk/button.cpp
index 28379ea99881fc20be1a0ab18a646c4dd092c82e..cf3fb8b26aea5aaff6be2c5278e78b97a5e25134 100644 (file)
--- a/src/gtk/button.cpp
+++ b/src/gtk/button.cpp
@@ -19,6 +19,7 @@
 #include "wx/stockitem.h"
 
 #include "wx/gtk/private.h"
+#include "wx/gtk/private/list.h"
 
 // ----------------------------------------------------------------------------
 // GTK callbacks
@@ -252,13 +253,12 @@ GtkLabel *wxButton::GTKGetLabel() const
     {
         GtkWidget* box = gtk_bin_get_child(GTK_BIN(child));
         GtkLabel* label = NULL;
-        GList* list = gtk_container_get_children(GTK_CONTAINER(box));
+        wxGtkList list(gtk_container_get_children(GTK_CONTAINER(box)));
         for (GList* item = list; item; item = item->next)
         {
             if (GTK_IS_LABEL(item->data))
                 label = GTK_LABEL(item->data);
         }
-        g_list_free(list);
 
         return label;
     }
@@ -280,12 +280,11 @@ void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
         GtkWidget* box = gtk_bin_get_child(GTK_BIN(child));
         if ( GTK_IS_BOX(box) )
         {
-            GList* list = gtk_container_get_children(GTK_CONTAINER(box));
+            wxGtkList list(gtk_container_get_children(GTK_CONTAINER(box)));
             for (GList* item = list; item; item = item->next)
             {
                 gtk_widget_modify_style(GTK_WIDGET(item->data), style);
             }
-            g_list_free(list);
         }
     }
 }

diff --git a/src/gtk/dataview.cpp b/src/gtk/dataview.cpp
index ee2ea2b68683c56f7f3e65a1e88221a08fe3ced6..b664d402d58257bab1283a061a0e987901c94980 100644 (file)
--- a/src/gtk/dataview.cpp
+++ b/src/gtk/dataview.cpp
@@ -34,6 +34,7 @@
 #include "wx/gtk/dcclient.h"
 
 #include "wx/gtk/private/gdkconv.h"
+#include "wx/gtk/private/list.h"
 using namespace wxGTKImpl;
 
 class wxGtkDataViewModelNotifier;
@@ -98,6 +99,26 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxGtkTreePath);
 };
 
+// ----------------------------------------------------------------------------
+// wxGtkTreePathList: self-destroying list of GtkTreePath objects.
+// ----------------------------------------------------------------------------
+
+class wxGtkTreePathList : public wxGtkList
+{
+public:
+    // Ctor takes ownership of the list.
+    explicit wxGtkTreePathList(GList* list)
+        : wxGtkList(list)
+    {
+    }
+
+    ~wxGtkTreePathList()
+    {
+        // Delete the list contents, wxGtkList will delete the list itself.
+        g_list_foreach(m_list, (GFunc)gtk_tree_path_free, NULL);
+    }
+};
+
 // ----------------------------------------------------------------------------
 // wxGtkTreeSelectionLock: prevent selection from changing during the
 //                                 lifetime of this object
@@ -4811,13 +4832,9 @@ int wxDataViewCtrl::GetColumnPosition( const wxDataViewColumn *column ) const
 {
     GtkTreeViewColumn *gtk_column = GTK_TREE_VIEW_COLUMN(column->GetGtkHandle());
 
-    GList *list = gtk_tree_view_get_columns( GTK_TREE_VIEW(m_treeview) );
-
-    gint pos = g_list_index( list, (gconstpointer)  gtk_column );
+    wxGtkList list(gtk_tree_view_get_columns(GTK_TREE_VIEW(m_treeview)));
 
-    g_list_free( list );
-
-    return pos;
+    return g_list_index( list, (gconstpointer)  gtk_column );
 }
 
 wxDataViewColumn *wxDataViewCtrl::GetSortingColumn() const
@@ -4956,23 +4973,17 @@ int wxDataViewCtrl::GetSelections( wxDataViewItemArray & sel ) const
     if (HasFlag(wxDV_MULTIPLE))
     {
         GtkTreeModel *model;
-        GList *list = gtk_tree_selection_get_selected_rows( selection, &model );
+        wxGtkTreePathList list(gtk_tree_selection_get_selected_rows(selection, &model));
 
         int count = 0;
-        while (list)
+        for ( GList* current = list; current; current = g_list_next(current) )
         {
             GtkTreePath *path = (GtkTreePath*) list->data;
 
             sel.Add(GTKPathToItem(path));
-
-            list = g_list_next( list );
             count++;
         }
 
-        // delete list
-        g_list_foreach( list, (GFunc) gtk_tree_path_free, NULL );
-        g_list_free( list );
-
         return count;
     }
     else