Fixed a severe crash bug

[wxWidgets.git] / include / wx / docview.h

diff --git a/include/wx/docview.h b/include/wx/docview.h
index 2a08d2c0ff47176504c1d9723faa548c21c0e496..b8bb1f31c9a4a20498acd6018dd5bb93e7a15961 100644 (file)
--- a/include/wx/docview.h
+++ b/include/wx/docview.h
@@ -248,10 +248,7 @@ public:
 
     // set the associated frame, it is used to reset its view when we're
     // destroyed
-    void SetDocChildFrame(wxDocChildFrameAnyBase *docChildFrame)
-    {
-        m_docChildFrame = docChildFrame;
-    }
+    void SetDocChildFrame(wxDocChildFrameAnyBase *docChildFrame);
 
 protected:
     // hook the document into event handlers chain here
@@ -520,16 +517,47 @@ inline size_t wxDocManager::GetNoHistoryFiles() const
 // wxDocChildFrameAny does
 // ----------------------------------------------------------------------------
 
-class wxDocChildFrameAnyBase
+class WXDLLIMPEXP_CORE wxDocChildFrameAnyBase
 {
 public:
-    wxDocChildFrameAnyBase(wxDocument *doc, wxView *view)
+    // default ctor, use Create() after it
+    wxDocChildFrameAnyBase()
+    {
+        m_childDocument = NULL;
+        m_childView = NULL;
+        m_win = NULL;
+    }
+
+    // full ctor equivalent to using the default one and Create(0
+    wxDocChildFrameAnyBase(wxDocument *doc, wxView *view, wxWindow *win)
+    {
+        Create(doc, view, win);
+    }
+
+    // method which must be called for an object created using the default ctor
+    //
+    // note that it returns bool just for consistency with Create() methods in
+    // other classes, we never return false from here
+    bool Create(wxDocument *doc, wxView *view, wxWindow *win)
     {
         m_childDocument = doc;
         m_childView = view;
+        m_win = win;
 
         if ( view )
             view->SetDocChildFrame(this);
+
+        return true;
+    }
+
+    // dtor doesn't need to be virtual, an object should never be destroyed via
+    // a pointer to this class
+    ~wxDocChildFrameAnyBase()
+    {
+        // prevent the view from deleting us if we're being deleted directly
+        // (and not via Close() + Destroy())
+        if ( m_childView )
+            m_childView->SetDocChildFrame(NULL);
     }
 
     wxDocument *GetDocument() const { return m_childDocument; }
@@ -537,6 +565,8 @@ public:
     void SetDocument(wxDocument *doc) { m_childDocument = doc; }
     void SetView(wxView *view) { m_childView = view; }
 
+    wxWindow *GetWindow() const { return m_win; }
+
 protected:
     // we're not a wxEvtHandler but we provide this wxEvtHandler-like function
     // which is called from TryBefore() of the derived classes to give our view
@@ -554,6 +584,11 @@ protected:
     wxDocument*       m_childDocument;
     wxView*           m_childView;
 
+    // the associated window: having it here is not terribly elegant but it
+    // allows us to avoid having any virtual functions in this class
+    wxWindow* m_win;
+
+
     wxDECLARE_NO_COPY_CLASS(wxDocChildFrameAnyBase);
 };
 
@@ -574,6 +609,9 @@ class WXDLLIMPEXP_CORE wxDocChildFrameAny : public ChildFrame,
 public:
     typedef ChildFrame BaseClass;
 
+    // default ctor, use Create after it
+    wxDocChildFrameAny() { }
+
     // ctor for a frame showing the given view of the specified document
     wxDocChildFrameAny(wxDocument *doc,
                        wxView *view,
@@ -584,16 +622,32 @@ public:
                        const wxSize& size = wxDefaultSize,
                        long style = wxDEFAULT_FRAME_STYLE,
                        const wxString& name = wxFrameNameStr)
-        : BaseClass(parent, id, title, pos, size, style, name),
-          wxDocChildFrameAnyBase(doc, view)
     {
-        if ( view )
-            view->SetFrame(this);
+        Create(doc, view, parent, id, title, pos, size, style, name);
+    }
+
+    bool Create(wxDocument *doc,
+                wxView *view,
+                ParentFrame *parent,
+                wxWindowID id,
+                const wxString& title,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxDEFAULT_FRAME_STYLE,
+                const wxString& name = wxFrameNameStr)
+    {
+        if ( !wxDocChildFrameAnyBase::Create(doc, view, this) )
+            return false;
+
+        if ( !BaseClass::Create(parent, id, title, pos, size, style, name) )
+            return false;
 
         this->Connect(wxEVT_ACTIVATE,
                       wxActivateEventHandler(wxDocChildFrameAny::OnActivate));
         this->Connect(wxEVT_CLOSE_WINDOW,
                       wxCloseEventHandler(wxDocChildFrameAny::OnCloseWindow));
+
+        return true;
     }
 
     virtual bool Destroy()
@@ -636,11 +690,24 @@ private:
 // otherwise we could simply typedef it
 // ----------------------------------------------------------------------------
 
+#ifdef __VISUALC6__
+    // "non dll-interface class 'wxDocChildFrameAny<>' used as base interface
+    // for dll-interface class 'wxDocChildFrame'" -- this is bogus as the
+    // template will be DLL-exported but only once it is used as base class
+    // here!
+    #pragma warning (push)
+    #pragma warning (disable:4275)
+#endif
+
 typedef wxDocChildFrameAny<wxFrame, wxFrame> wxDocChildFrameBase;
 
 class WXDLLIMPEXP_CORE wxDocChildFrame : public wxDocChildFrameBase
 {
 public:
+    wxDocChildFrame()
+    {
+    }
+
     wxDocChildFrame(wxDocument *doc,
                     wxView *view,
                     wxFrame *parent,
@@ -655,12 +722,31 @@ public:
     {
     }
 
+    bool Create(wxDocument *doc,
+                wxView *view,
+                wxFrame *parent,
+                wxWindowID id,
+                const wxString& title,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxDEFAULT_FRAME_STYLE,
+                const wxString& name = wxFrameNameStr)
+    {
+        return wxDocChildFrameBase::Create
+               (
+                    doc, view,
+                    parent, id, title, pos, size, style, name
+               );
+    }
+
 private:
     DECLARE_CLASS(wxDocChildFrame)
     wxDECLARE_NO_COPY_CLASS(wxDocChildFrame);
 };
 
-WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE( wxDocChildFrameBase )
+#ifdef __VISUALC6__
+    #pragma warning (pop)
+#endif
 
 // ----------------------------------------------------------------------------
 // A default parent frame