set m_isBeingDeleted to true (only) in SendDestroyEvent(); call it as early as possible during the window destruction to ensure that destroy event handlers can still access the full window object

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58246 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/control.h

@@ -35,7 +35,6 @@ public:
             const wxValidator& validator = wxDefaultValidator,
             const wxString& name = wxControlNameStr);
 
-    virtual ~wxControl();
 
     // Simulates an event
     virtual void Command(wxCommandEvent& event) { ProcessCommand(event); }

include/wx/os2/control.h

@@ -32,7 +32,6 @@ public:
     {
         Create( pParent, vId, rPos, rSize, lStyle, rValidator, rsName );
     }
-    virtual ~wxControl();
 
     bool Create( wxWindow*          pParent
                 ,wxWindowID         vId

include/wx/osx/control.h

@@ -35,7 +35,6 @@ public:
             const wxSize& size = wxDefaultSize, long style = 0,
             const wxValidator& validator = wxDefaultValidator,
             const wxString& name = wxControlNameStr);
-   virtual ~wxControl();
 
    // Simulates an event
    virtual void Command(wxCommandEvent& event) { ProcessCommand(event); }

include/wx/window.h

@@ -1402,7 +1402,8 @@ protected:
     void SatisfyConstraints();
 #endif // wxUSE_CONSTRAINTS
 
-    // Send the wxWindowDestroyEvent
+    // Send the wxWindowDestroyEvent if not done yet and sets m_isBeingDeleted
+    // to true
     void SendDestroyEvent();
 
     // returns the main window of composite control; this is the window

src/aui/auibook.cpp

@@ -2898,7 +2898,7 @@ void wxAuiNotebook::InitNotebook(long style)
 wxAuiNotebook::~wxAuiNotebook()
 {
     // Indicate we're deleting pages
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     while ( GetPageCount() > 0 )
         DeletePage(0);

src/cocoa/window.mm

@@ -943,7 +943,6 @@ void wxWindowCocoa::Init()
     m_cocoaNSView = NULL;
     m_cocoaHider = NULL;
     m_wxCocoaScrollView = NULL;
-    m_isBeingDeleted = false;
     m_isInPaint = false;
     m_visibleTrackingRectManager = NULL;
 }

src/common/wincmn.cpp

@@ -209,7 +209,9 @@ wxWindowBase::wxWindowBase()
     // Whether we're using the current theme for this window (wxGTK only for now)
     m_themeEnabled = false;
 
-    // VZ: this one shouldn't exist...
+    // This is set to true by SendDestroyEvent() which should be called by the
+    // most derived class to ensure that the destruction event is sent as soon
+    // as possible to allow its handlers to still see the undestroyed window
     m_isBeingDeleted = false;
 
     m_freezeCount = 0;
@@ -387,6 +389,16 @@ bool wxWindowBase::IsBeingDeleted() const
 
 void wxWindowBase::SendDestroyEvent()
 {
+    if ( m_isBeingDeleted )
+    {
+        // we could have been already called from a more derived class dtor,
+        // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
+        // should be simply ignored
+        return;
+    }
+
+    m_isBeingDeleted = true;
+
     wxWindowDestroyEvent event;
     event.SetEventObject(this);
     event.SetId(GetId());

src/dfb/nonownedwnd.cpp

@@ -153,7 +153,7 @@ bool wxNonOwnedWindow::Create(wxWindow *parent,
 
 wxNonOwnedWindow::~wxNonOwnedWindow()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // destroy all children before we destroy the underlying DirectFB window,
     // so that if any of them does something with the TLW, it will still work:

src/dfb/window.cpp

@@ -88,8 +88,6 @@ wxWindowDFB::~wxWindowDFB()
 {
     SendDestroyEvent();
 
-    m_isBeingDeleted = true;
-
     if ( gs_mouseCapture == this )
         ReleaseMouse();
 

src/gtk/dialog.cpp

@@ -85,8 +85,6 @@ bool wxDialog::Show( bool show )
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
-
     // if the dialog is modal, this will end its event loop
     if ( IsModal() )
         EndModal(wxID_CANCEL);

src/gtk/frame.cpp

@@ -56,7 +56,8 @@ bool wxFrame::Create( wxWindow *parent,
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
+
     DeleteAllBars();
 }
 

src/gtk/toplevel.cpp

@@ -665,7 +665,7 @@ wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
         RemoveGrab();
     }
 
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // it may also be GtkScrolledWindow in the case of an MDI child
     if (GTK_IS_WINDOW(m_widget))

src/gtk/window.cpp

@@ -2040,7 +2040,6 @@ void wxWindowGTK::Init()
     m_height = 0;
 
     m_hasVMT = false;
-    m_isBeingDeleted = false;
 
     m_showOnIdle = false;
 
@@ -2210,7 +2209,6 @@ wxWindowGTK::~wxWindowGTK()
     if ( gs_deferredFocusOut == this )
         gs_deferredFocusOut = NULL;
 
-    m_isBeingDeleted = true;
     m_hasVMT = false;
 
     // destroy children before destroying this window itself

src/gtk1/frame.cpp

@@ -229,7 +229,8 @@ bool wxFrame::Create( wxWindow *parent,
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
+
     DeleteAllBars();
 }
 

src/gtk1/toplevel.cpp

@@ -660,7 +660,7 @@ wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
         RemoveGrab();
     }
 
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // it may also be GtkScrolledWindow in the case of an MDI child
     if (GTK_IS_WINDOW(m_widget))

src/gtk1/window.cpp

@@ -2437,7 +2437,6 @@ void wxWindowGTK::Init()
     m_sizeSet = false;
     m_hasVMT = false;
     m_needParent = true;
-    m_isBeingDeleted = false;
 
     m_noExpose = false;
     m_nativeSizeEvent = false;
@@ -2613,7 +2612,6 @@ wxWindowGTK::~wxWindowGTK()
     if ( g_delayedFocus == this )
         g_delayedFocus = NULL;
 
-    m_isBeingDeleted = true;
     m_hasVMT = false;
 
     // destroy children before destroying this window itself

src/mgl/window.cpp

@@ -559,8 +559,6 @@ wxWindowMGL::~wxWindowMGL()
 {
     SendDestroyEvent();
 
-    m_isBeingDeleted = true;
-
     if ( gs_mouseCapture == this )
         ReleaseMouse();
 

src/motif/dialog.cpp

@@ -181,7 +181,7 @@ void wxDialog::SetModal(bool flag)
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // if the dialog is modal, this will end its event loop
     Show(false);

src/motif/frame.cpp

@@ -253,7 +253,7 @@ bool wxFrame::XmDoCreateTLW(wxWindow* WXUNUSED(parent),
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     if (m_clientArea)
     {

src/motif/window.cpp

@@ -345,11 +345,11 @@ bool wxWindow::Create(wxWindow *parent, wxWindowID id,
 // Destructor
 wxWindow::~wxWindow()
 {
+    SendDestroyEvent();
+
     if (g_captureWindow == this)
         g_captureWindow = NULL;
 
-    m_isBeingDeleted = true;
-
     // Motif-specific actions first
     WXWidget wMain = GetMainWidget();
     if ( wMain )

src/msw/control.cpp

@@ -59,15 +59,6 @@ IMPLEMENT_ABSTRACT_CLASS(wxControl, wxWindow)
 // wxControl implementation
 // ============================================================================
 
-// ----------------------------------------------------------------------------
-// wxControl ctor/dtor
-// ----------------------------------------------------------------------------
-
-wxControl::~wxControl()
-{
-    m_isBeingDeleted = true;
-}
-
 // ----------------------------------------------------------------------------
 // control window creation
 // ----------------------------------------------------------------------------

src/msw/dialog.cpp

@@ -192,8 +192,6 @@ bool wxDialog::Create(wxWindow *parent,
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
-
     // this will also reenable all the other windows for a modal dialog
     Show(false);
 

src/msw/frame.cpp

@@ -209,7 +209,8 @@ bool wxFrame::Create(wxWindow *parent,
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
+
     DeleteAllBars();
 }
 

src/msw/radiobox.cpp

@@ -254,7 +254,7 @@ bool wxRadioBox::Create(wxWindow *parent,
 
 wxRadioBox::~wxRadioBox()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     delete m_radioButtons;
     if ( m_dummyHwnd )

src/msw/toplevel.cpp

@@ -599,6 +599,8 @@ bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 
 wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
 {
+    SendDestroyEvent();
+
 #if defined(__SMARTPHONE__) || defined(__POCKETPC__)
     SHACTIVATEINFO* info = (SHACTIVATEINFO*) m_activateInfo;
     delete info;

src/msw/window.cpp

@@ -518,7 +518,6 @@ bool wxWindowMSW::MSWCommand(WXUINT WXUNUSED(param), WXWORD WXUNUSED(id))
 void wxWindowMSW::Init()
 {
     // MSW specific
-    m_isBeingDeleted = false;
     m_oldWndProc = NULL;
     m_mouseInWindow = false;
     m_lastKeydownProcessed = false;
@@ -540,7 +539,7 @@ void wxWindowMSW::Init()
 // Destructor
 wxWindowMSW::~wxWindowMSW()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
 #ifndef __WXUNIVERSAL__
     // VS: make sure there's no wxFrame with last focus set to us:
@@ -3949,8 +3948,6 @@ bool wxWindowMSW::HandleCreate(WXLPCREATESTRUCT WXUNUSED_IN_WINCE(cs),
 
 bool wxWindowMSW::HandleDestroy()
 {
-    SendDestroyEvent();
-
     // delete our drop target if we've got one
 #if wxUSE_DRAG_AND_DROP
     if ( m_dropTarget != NULL )

src/os2/control.cpp

@@ -60,11 +60,6 @@ bool wxControl::Create( wxWindow*           pParent,
     return bRval;
 } // end of wxControl::Create
 
-wxControl::~wxControl()
-{
-    m_isBeingDeleted = true;
-}
-
 bool wxControl::OS2CreateControl( const wxChar* zClassname,
                                   const wxString& rsLabel,
                                   const wxPoint& rPos,

src/os2/dialog.cpp

@@ -147,7 +147,7 @@ void wxDialog::SetModal(bool WXUNUSED(bFlag))
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // this will also reenable all the other windows for a modal dialog
     Show(false);

src/os2/frame.cpp

@@ -127,7 +127,8 @@ bool wxFrame::Create( wxWindow*       pParent,
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
+
     DeleteAllBars();
 } // end of wxFrame::~wxFrame
 

src/os2/radiobox.cpp

@@ -76,7 +76,7 @@ wxRadioBox::wxRadioBox()
 
 wxRadioBox::~wxRadioBox()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     if (m_hWnd)
         wxRemoveHandleAssociation(this);

src/os2/window.cpp

@@ -334,7 +334,7 @@ void wxWindowOS2::Init()
 //
 wxWindowOS2::~wxWindowOS2()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     for (wxWindow* pWin = GetParent(); pWin; pWin = pWin->GetParent())
     {

src/osx/carbon/control.cpp

@@ -63,11 +63,6 @@ bool wxControl::Create( wxWindow *parent,
     return rval;
 }
 
-wxControl::~wxControl()
-{
-    m_isBeingDeleted = true;
-}
-
 bool wxControl::ProcessCommand( wxCommandEvent &event )
 {
     // Tries:

src/osx/carbon/drawer.cpp

@@ -41,8 +41,8 @@ wxDrawerWindow::wxDrawerWindow()
 
 wxDrawerWindow::~wxDrawerWindow()
 {
-    m_isBeingDeleted = TRUE;
-    this->Show(FALSE);
+    SendDestroyEvent();
+    Show(FALSE);
 }
 
 bool wxDrawerWindow::Create(wxWindow *parent,

src/osx/carbon/frame.cpp

@@ -61,7 +61,8 @@ bool wxFrame::Create(wxWindow *parent,
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
+
     DeleteAllBars();
 }
 

src/osx/dialog_osx.cpp

@@ -71,7 +71,7 @@ void wxDialog::SetModal( bool flag )
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     // if the dialog is modal, this will end its event loop
     Show(false);

src/osx/nonownedwnd_osx.cpp

@@ -151,7 +151,7 @@ bool wxNonOwnedWindow::Create(wxWindow *parent,
 
 wxNonOwnedWindow::~wxNonOwnedWindow()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
     
     wxRemoveWXWindowAssociation( this ) ;
     

src/osx/radiobox_osx.cpp

@@ -52,7 +52,7 @@ wxRadioBox::wxRadioBox()
 
 wxRadioBox::~wxRadioBox()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     wxRadioButton *next, *current;
 

src/osx/window_osx.cpp

@@ -141,8 +141,6 @@ wxWindowMac::~wxWindowMac()
 {
     SendDestroyEvent();
 
-    m_isBeingDeleted = true;
-
     MacInvalidateBorders() ;
 
 #ifndef __WXUNIVERSAL__

src/palmos/control.cpp

@@ -77,8 +77,9 @@ void wxControl::Init()
 
 wxControl::~wxControl()
 {
+    SendDestroyEvent();
+
     SetLabel(wxEmptyString);
-    m_isBeingDeleted = true;
 
     DestroyChildren();
 

src/univ/dialog.cpp

@@ -53,8 +53,6 @@ void wxDialog::Init()
 
 wxDialog::~wxDialog()
 {
-    m_isBeingDeleted = true;
-
     // if the dialog is modal, this will end its event loop
     Show(false);
 

src/univ/winuniv.cpp

@@ -224,7 +224,7 @@ bool wxWindow::Create(wxWindow *parent,
 
 wxWindow::~wxWindow()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
 #if wxUSE_SCROLLBAR
     // clear pointers to scrollbar before deleting the children: they are

src/x11/window.cpp

@@ -350,8 +350,6 @@ wxWindowX11::~wxWindowX11()
     if (g_captureWindow == this)
         g_captureWindow = NULL;
 
-    m_isBeingDeleted = true;
-
     DestroyChildren();
 
     if (m_clientWindow != m_mainWindow)