fixed huge memory leak in wxFileDialog (closes patch 544060)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15214 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -201,8 +201,8 @@ wxGTK:
 - support for more SGI hardware (12-bit mode among others)
 - fixed wxDC::Blit() to honour source DC's logical coordinates
 - implemented wxIdleEvent::RequestMore() for simple background tasks
-  (unlike thread work)
 - implemented wxChoice::Delete()
+- fixed bad memory leak in wxFileDialog (Chris Elliott)
 
 wxHTML:
 

src/generic/filedlgg.cpp

@@ -74,10 +74,9 @@
 //  wxFileData
 //-----------------------------------------------------------------------------
 
-class wxFileData : public wxObject
+class wxFileData
 {
 public:
-    wxFileData() { }
     wxFileData( const wxString &name, const wxString &fname );
     wxString GetName() const;
     wxString GetFullName() const;
@@ -103,8 +102,6 @@ private:
     bool     m_isDir;
     bool     m_isLink;
     bool     m_isExe;
-
-    DECLARE_DYNAMIC_CLASS(wxFileData);
 };
 
 //-----------------------------------------------------------------------------
@@ -124,6 +121,8 @@ public:
                 long style = wxLC_LIST,
                 const wxValidator &validator = wxDefaultValidator,
                 const wxString &name = wxT("filelist") );
+    virtual ~wxFileCtrl();
+
     void ChangeToListMode();
     void ChangeToReportMode();
     void ChangeToIconMode();
@@ -138,7 +137,6 @@ public:
     void SetWild( const wxString &wild );
     void GetDir( wxString &dir );
     void OnListDeleteItem( wxListEvent &event );
-    void OnListDeleteAllItems( wxListEvent &event );
     void OnListEndLabelEdit( wxListEvent &event );
 
     // Associate commonly used UI controls with wxFileCtrl so that they can be
@@ -148,6 +146,9 @@ public:
     void SetNewDirControl(wxWindow *ctrl) { m_newDirControl = ctrl; }
 
 private:
+    void FreeItemData(const wxListItem& item);
+    void FreeAllItemsData();
+
     wxString      m_dirName;
     bool          m_showHidden;
     wxString      m_wild;
@@ -391,8 +392,6 @@ extern bool wxIsDriveAvailable(const wxString& dirName);
 //  wxFileData
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxFileData,wxObject);
-
 wxFileData::wxFileData( const wxString &name, const wxString &fname )
 {
     m_name = name;
@@ -584,7 +583,6 @@ IMPLEMENT_DYNAMIC_CLASS(wxFileCtrl,wxListCtrl);
 
 BEGIN_EVENT_TABLE(wxFileCtrl,wxListCtrl)
     EVT_LIST_DELETE_ITEM(-1, wxFileCtrl::OnListDeleteItem)
-    EVT_LIST_DELETE_ALL_ITEMS(-1, wxFileCtrl::OnListDeleteAllItems)
     EVT_LIST_END_LABEL_EDIT(-1, wxFileCtrl::OnListEndLabelEdit)
 END_EVENT_TABLE()
 
@@ -680,7 +678,9 @@ void wxFileCtrl::UpdateFiles()
             name_col_width = GetColumnWidth( 0 );
     }
 
+    FreeAllItemsData();
     ClearAll();
+
     if (my_style & wxLC_REPORT)
     {
         if (name_col_width < 140) name_col_width = 140;
@@ -884,13 +884,18 @@ void wxFileCtrl::GetDir( wxString &dir )
     dir = m_dirName;
 }
 
-void wxFileCtrl::OnListDeleteItem( wxListEvent &event )
+void wxFileCtrl::FreeItemData(const wxListItem& item)
 {
-    wxFileData *fd = (wxFileData*)event.m_item.m_data;
+    wxFileData *fd = (wxFileData*)item.m_data;
     delete fd;
 }
 
-void wxFileCtrl::OnListDeleteAllItems( wxListEvent &WXUNUSED(event) )
+void wxFileCtrl::OnListDeleteItem( wxListEvent &event )
+{
+    FreeItemData(event.m_item);
+}
+
+void wxFileCtrl::FreeAllItemsData()
 {
     wxListItem item;
     item.m_mask = wxLIST_MASK_DATA;
@@ -899,10 +904,7 @@ void wxFileCtrl::OnListDeleteAllItems( wxListEvent &WXUNUSED(event) )
     while ( item.m_itemId != -1 )
     {
         GetItem( item );
-        wxFileData *fd = (wxFileData*)item.m_data;
-        delete fd;
-        item.m_data = 0;
-        SetItem( item );
+        FreeItemData(item);
         item.m_itemId = GetNextItem( item.m_itemId, wxLIST_NEXT_ALL );
     }
 }
@@ -950,6 +952,11 @@ void wxFileCtrl::OnListEndLabelEdit( wxListEvent &event )
     }
 }
 
+wxFileCtrl::~wxFileCtrl()
+{
+    FreeAllItemsData();
+}
+
 //-----------------------------------------------------------------------------
 // wxFileDialog
 //-----------------------------------------------------------------------------