delete the associated wxStaticBox in wxStaticBoxSizer dtor (patch 1473769)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39380 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -24,6 +24,7 @@ INCOMPATIBLE CHANGES SINCE 2.6.x
   use GetMouseCursor().
 - wxFontEnumerator::GetFacenames() and GetEncodings() now return arrays and
   not pointers to arrays
+- wxStaticBoxSizer now deletes the associated wxStaticBox when it is deleted
 
 
 Deprecated methods since 2.6.x and their replacements

docs/latex/wx/sbsizer.tex

@@ -1,8 +1,10 @@
 \section{\class{wxStaticBoxSizer}}\label{wxstaticboxsizer}
 
 wxStaticBoxSizer is a sizer derived from wxBoxSizer but adds a static
-box around the sizer. This static box has to be created independently or the
-sizer may create it itself as a convenience.
+box around the sizer. This static box may be either created independently or
+the sizer may create it itself as a convenience. In any case, the sizer owns
+the \helpref{wxStaticBox}{wxstaticbox} control and will delete it if it is
+deleted.
 
 \wxheading{Derived from}
 

include/wx/sizer.h

@@ -685,6 +685,7 @@ class WXDLLEXPORT wxStaticBoxSizer: public wxBoxSizer
 public:
     wxStaticBoxSizer(wxStaticBox *box, int orient);
     wxStaticBoxSizer(int orient, wxWindow *win, const wxString& label = wxEmptyString);
+    virtual ~wxStaticBoxSizer() { delete m_staticBox; }
 
     void RecalcSizes();
     wxSize CalcMin();
@@ -694,6 +695,7 @@ public:
 
     // override to hide/show the static box as well
     virtual void ShowItems (bool show);
+    virtual bool Detach( wxWindow *window );
 
 protected:
     wxStaticBox   *m_staticBox;

src/common/sizer.cpp

@@ -1697,16 +1697,22 @@ wxSize wxBoxSizer::CalcMin()
 #if wxUSE_STATBOX
 
 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
-    : wxBoxSizer( orient )
-    , m_staticBox( box )
+    : wxBoxSizer( orient ),
+      m_staticBox( box )
 {
     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
+
+    // do this so that our Detach() is called if the static box is destroyed
+    // before we are
+    m_staticBox->SetContainingSizer(this);
 }
 
 wxStaticBoxSizer::wxStaticBoxSizer(int orient, wxWindow *win, const wxString& s)
                 : wxBoxSizer(orient),
                   m_staticBox(new wxStaticBox(win, wxID_ANY, s))
 {
+    // same as above
+    m_staticBox->SetContainingSizer(this);
 }
 
 static void GetStaticBoxBorders( wxStaticBox *box,
@@ -1756,6 +1762,20 @@ void wxStaticBoxSizer::ShowItems( bool show )
     wxBoxSizer::ShowItems( show );
 }
 
+bool wxStaticBoxSizer::Detach( wxWindow *window )
+{
+    // avoid deleting m_staticBox in our dtor if it's being detached from the
+    // sizer (which can happen because it's being already destroyed for
+    // example)
+    if ( window == m_staticBox )
+    {
+        m_staticBox = NULL;
+        return true;
+    }
+
+    return wxSizer::Detach( window );
+}
+
 #endif // wxUSE_STATBOX
 
 #if wxUSE_BUTTON