fix an mdi crash on exit

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29346 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/gtk/mdi.cpp b/src/gtk/mdi.cpp
index f1006d4ca57414e42ec367153740919e215d02a8..131cee85cb10060bb0bc628b18544113e2b7acb0 100644 (file)
--- a/src/gtk/mdi.cpp
+++ b/src/gtk/mdi.cpp
@@ -15,6 +15,7 @@
 #include "wx/wxprec.h"
 
 #include "wx/mdi.h"
+#include "wx/notebook.h"
 
 #if wxUSE_MDI
 
@@ -82,8 +83,11 @@ gtk_mdi_page_change_callback( GtkNotebook *WXUNUSED(widget),
     while (node)
     {
         wxMDIChildFrame *child_frame = wxDynamicCast( node->GetData(), wxMDIChildFrame );
-
-        wxASSERT_MSG( child_frame, _T("child is not a wxMDIChildFrame") );
+        // CE: we come here in the destructor with a null child_frame - I think because
+        // gtk_signal_connect( GTK_OBJECT(m_widget), "switch_page", (see below)
+        // isn't deleted early enough
+        if (!child_frame)
+          return ;
 
         if (child_frame->m_page == page)
         {
@@ -329,7 +333,7 @@ wxMDIChildFrame::~wxMDIChildFrame()
 {
     if (m_menuBar)
         delete m_menuBar;
-}
+} 
 
 bool wxMDIChildFrame::Create( wxMDIParentFrame *parent,
       wxWindowID id, const wxString& title,
@@ -484,6 +488,7 @@ wxMDIClientWindow::wxMDIClientWindow( wxMDIParentFrame *parent, long style )
 
 wxMDIClientWindow::~wxMDIClientWindow()
 {
+
 }
 
 bool wxMDIClientWindow::CreateClient( wxMDIParentFrame *parent, long style )

diff --git a/src/gtk1/mdi.cpp b/src/gtk1/mdi.cpp
index f1006d4ca57414e42ec367153740919e215d02a8..131cee85cb10060bb0bc628b18544113e2b7acb0 100644 (file)
--- a/src/gtk1/mdi.cpp
+++ b/src/gtk1/mdi.cpp
@@ -15,6 +15,7 @@
 #include "wx/wxprec.h"
 
 #include "wx/mdi.h"
+#include "wx/notebook.h"
 
 #if wxUSE_MDI
 
@@ -82,8 +83,11 @@ gtk_mdi_page_change_callback( GtkNotebook *WXUNUSED(widget),
     while (node)
     {
         wxMDIChildFrame *child_frame = wxDynamicCast( node->GetData(), wxMDIChildFrame );
-
-        wxASSERT_MSG( child_frame, _T("child is not a wxMDIChildFrame") );
+        // CE: we come here in the destructor with a null child_frame - I think because
+        // gtk_signal_connect( GTK_OBJECT(m_widget), "switch_page", (see below)
+        // isn't deleted early enough
+        if (!child_frame)
+          return ;
 
         if (child_frame->m_page == page)
         {
@@ -329,7 +333,7 @@ wxMDIChildFrame::~wxMDIChildFrame()
 {
     if (m_menuBar)
         delete m_menuBar;
-}
+} 
 
 bool wxMDIChildFrame::Create( wxMDIParentFrame *parent,
       wxWindowID id, const wxString& title,
@@ -484,6 +488,7 @@ wxMDIClientWindow::wxMDIClientWindow( wxMDIParentFrame *parent, long style )
 
 wxMDIClientWindow::~wxMDIClientWindow()
 {
+
 }
 
 bool wxMDIClientWindow::CreateClient( wxMDIParentFrame *parent, long style )