Return NULL from wxWindow::GetCapture() when the capture is being lost.

[wxWidgets.git] / src / common / sizer.cpp

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index 410aac2bd8e27dab2477b7116f11b377e0aa52f3..31bed2c619db8fa09f0cd1191bccbc4c29c6663e 100644 (file)
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -1,18 +1,14 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        sizer.cpp
+// Name:        src/common/sizer.cpp

 // Purpose:     provide new wxSizer class for layout
 // Purpose:     provide new wxSizer class for layout

-// Author:      Robert Roebling and Robin Dunn
-// Modified by:
+// Author:      Robert Roebling and Robin Dunn, contributions by
+//              Dirk Holtwick, Ron Lee
+// Modified by: Ron Lee

 // Created:
 // Created:

-// RCS-ID:      $Id$
-// Copyright:   (c) Robin Dunn, Dirk Holtwick and Robert Roebling
+// Copyright:   (c) Robin Dunn, Robert Roebling

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-#pragma implementation "sizer.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -21,101 +17,309 @@
 #endif
 
 #include "wx/sizer.h"
 #endif
 
 #include "wx/sizer.h"

-#include "wx/utils.h"
-#include "wx/statbox.h"
-#include "wx/notebook.h"
+#include "wx/private/flagscheck.h"
+
+#ifndef WX_PRECOMP
+    #include "wx/string.h"
+    #include "wx/intl.h"
+    #include "wx/math.h"
+    #include "wx/utils.h"
+    #include "wx/settings.h"
+    #include "wx/button.h"
+    #include "wx/statbox.h"
+    #include "wx/toplevel.h"
+#endif // WX_PRECOMP
+
+#include "wx/display.h"
+#include "wx/vector.h"
+#include "wx/listimpl.cpp"
+

 
 //---------------------------------------------------------------------------
 
 
 //---------------------------------------------------------------------------
 

-IMPLEMENT_ABSTRACT_CLASS(wxSizerItem, wxObject);
-IMPLEMENT_ABSTRACT_CLASS(wxSizer, wxObject);
-IMPLEMENT_ABSTRACT_CLASS(wxGridSizer, wxSizer);
-IMPLEMENT_ABSTRACT_CLASS(wxFlexGridSizer, wxGridSizer);
-IMPLEMENT_ABSTRACT_CLASS(wxBoxSizer, wxSizer);
+IMPLEMENT_CLASS(wxSizerItem, wxObject)
+IMPLEMENT_CLASS(wxSizer, wxObject)
+IMPLEMENT_CLASS(wxGridSizer, wxSizer)
+IMPLEMENT_CLASS(wxFlexGridSizer, wxGridSizer)
+IMPLEMENT_CLASS(wxBoxSizer, wxSizer)

 #if wxUSE_STATBOX
 #if wxUSE_STATBOX

-IMPLEMENT_ABSTRACT_CLASS(wxStaticBoxSizer, wxBoxSizer);
+IMPLEMENT_CLASS(wxStaticBoxSizer, wxBoxSizer)

 #endif
 #endif

-#if wxUSE_NOTEBOOK
-IMPLEMENT_ABSTRACT_CLASS(wxNotebookSizer, wxSizer);
+#if wxUSE_BUTTON
+IMPLEMENT_CLASS(wxStdDialogButtonSizer, wxBoxSizer)

 #endif
 
 #endif
 

-//---------------------------------------------------------------------------
+WX_DEFINE_EXPORTED_LIST( wxSizerItemList )
+
+/*
+    TODO PROPERTIES
+      sizeritem
+        object
+        object_ref
+          minsize
+          option
+          flag
+          border
+     spacer
+        option
+        flag
+        borfder
+    boxsizer
+       orient
+    staticboxsizer
+       orient
+       label
+    gridsizer
+       rows
+       cols
+       vgap
+       hgap
+    flexgridsizer
+       rows
+       cols
+       vgap
+       hgap
+       growablerows
+       growablecols
+    minsize
+*/
+
+// ----------------------------------------------------------------------------

 // wxSizerItem
 // wxSizerItem

-//---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+
+// check for flags conflicts
+static const int SIZER_FLAGS_MASK =
+    wxADD_FLAG(wxCENTRE,
+    wxADD_FLAG(wxHORIZONTAL,
+    wxADD_FLAG(wxVERTICAL,
+    wxADD_FLAG(wxLEFT,
+    wxADD_FLAG(wxRIGHT,
+    wxADD_FLAG(wxUP,
+    wxADD_FLAG(wxDOWN,
+    wxADD_FLAG(wxALIGN_NOT,
+    wxADD_FLAG(wxALIGN_CENTER_HORIZONTAL,
+    wxADD_FLAG(wxALIGN_RIGHT,
+    wxADD_FLAG(wxALIGN_BOTTOM,
+    wxADD_FLAG(wxALIGN_CENTER_VERTICAL,
+    wxADD_FLAG(wxFIXED_MINSIZE,
+    wxADD_FLAG(wxRESERVE_SPACE_EVEN_IF_HIDDEN,
+    wxADD_FLAG(wxSTRETCH_NOT,
+    wxADD_FLAG(wxSHRINK,
+    wxADD_FLAG(wxGROW,
+    wxADD_FLAG(wxSHAPED,
+    0))))))))))))))))));

 
 

-wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border, wxObject* userData )
+#define ASSERT_VALID_SIZER_FLAGS(f)  wxASSERT_VALID_FLAGS(f, SIZER_FLAGS_MASK)
+
+
+void wxSizerItem::Init(const wxSizerFlags& flags)

 {
 {

-    m_window = (wxWindow *) NULL;
-    m_sizer = (wxSizer *) NULL;
-    m_option = option;
-    m_border = border;
-    m_flag = flag;
-    m_userData = userData;
+    Init();

 
 

-    // minimal size is the initial size
-    m_minSize.x = width;
-    m_minSize.y = height;
+    m_proportion = flags.GetProportion();
+    m_flag = flags.GetFlags();
+    m_border = flags.GetBorderInPixels();

 
 

-    SetRatio(width, height);
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+}
+
+wxSizerItem::wxSizerItem()
+{
+    Init();

 
 

-    // size is set directly
-    m_size = m_minSize;
+    m_proportion = 0;
+    m_border = 0;
+    m_flag = 0;
+    m_id = wxID_NONE;

 }
 
 }
 

-wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border, wxObject* userData )
+// window item
+void wxSizerItem::DoSetWindow(wxWindow *window)

 {
 {

+    wxCHECK_RET( window, wxT("NULL window in wxSizerItem::SetWindow()") );
+
+    m_kind = Item_Window;

     m_window = window;
     m_window = window;

-    m_sizer = (wxSizer *) NULL;
-    m_option = option;
-    m_border = border;
-    m_flag = flag;
-    m_userData = userData;

 
 

-    // minimal size is the initial size
+    // window doesn't become smaller than its initial size, whatever happens

     m_minSize = window->GetSize();
 
     m_minSize = window->GetSize();
 

+    if ( m_flag & wxFIXED_MINSIZE )
+        window->SetMinSize(m_minSize);
+

     // aspect ratio calculated from initial size
     SetRatio(m_minSize);
     // aspect ratio calculated from initial size
     SetRatio(m_minSize);

+}
+
+wxSizerItem::wxSizerItem(wxWindow *window,
+                         int proportion,
+                         int flag,
+                         int border,
+                         wxObject* userData)
+           : m_kind(Item_None),
+             m_proportion(proportion),
+             m_border(border),
+             m_flag(flag),
+             m_id(wxID_NONE),
+             m_userData(userData)
+{
+    ASSERT_VALID_SIZER_FLAGS( m_flag );

 
 

-    // size is calculated later
-    // m_size = ...
+    DoSetWindow(window);

 }
 
 }
 

-wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
+// sizer item
+void wxSizerItem::DoSetSizer(wxSizer *sizer)

 {
 {

-    m_window = (wxWindow *) NULL;
+    m_kind = Item_Sizer;

     m_sizer = sizer;
     m_sizer = sizer;

-    m_option = option;
-    m_border = border;
-    m_flag = flag;
-    m_userData = userData;
+}
+
+wxSizerItem::wxSizerItem(wxSizer *sizer,
+                         int proportion,
+                         int flag,
+                         int border,
+                         wxObject* userData)
+           : m_kind(Item_None),
+             m_sizer(NULL),
+             m_proportion(proportion),
+             m_border(border),
+             m_flag(flag),
+             m_id(wxID_NONE),
+             m_ratio(0.0),
+             m_userData(userData)
+{
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+
+    DoSetSizer(sizer);
+
+    // m_minSize is set later
+}
+
+// spacer item
+void wxSizerItem::DoSetSpacer(const wxSize& size)
+{
+    m_kind = Item_Spacer;
+    m_spacer = new wxSizerSpacer(size);
+    m_minSize = size;
+    SetRatio(size);
+}
+
+wxSize wxSizerItem::AddBorderToSize(const wxSize& size) const
+{
+    wxSize result = size;
+
+    // Notice that we shouldn't modify the unspecified component(s) of the
+    // size, it's perfectly valid to have either min or max size specified in
+    // one direction only and it shouldn't be applied in the other one then.

 
 

-    // minimal size is calculated later
-    // m_minSize = ...
-    m_ratio = 0;
+    if ( result.x != wxDefaultCoord )
+    {
+        if (m_flag & wxWEST)
+            result.x += m_border;
+        if (m_flag & wxEAST)
+            result.x += m_border;
+    }
+
+    if ( result.y != wxDefaultCoord )
+    {
+        if (m_flag & wxNORTH)
+            result.y += m_border;
+        if (m_flag & wxSOUTH)
+            result.y += m_border;
+    }
+
+    return result;
+}
+
+wxSizerItem::wxSizerItem(int width,
+                         int height,
+                         int proportion,
+                         int flag,
+                         int border,
+                         wxObject* userData)
+           : m_kind(Item_None),
+             m_sizer(NULL),
+             m_minSize(width, height), // minimal size is the initial size
+             m_proportion(proportion),
+             m_border(border),
+             m_flag(flag),
+             m_id(wxID_NONE),
+             m_userData(userData)
+{
+    ASSERT_VALID_SIZER_FLAGS( m_flag );

 
 

-    // size is calculated later
-    // m_size = ...
+    DoSetSpacer(wxSize(width, height));

 }
 
 wxSizerItem::~wxSizerItem()
 {
 }
 
 wxSizerItem::~wxSizerItem()
 {

-    if (m_userData)
-        delete m_userData;
-    if (m_sizer)
-        delete m_sizer;
+    delete m_userData;
+    Free();
+}
+
+void wxSizerItem::Free()
+{
+    switch ( m_kind )
+    {
+        case Item_None:
+            break;
+
+        case Item_Window:
+            m_window->SetContainingSizer(NULL);
+            break;
+
+        case Item_Sizer:
+            delete m_sizer;
+            break;
+
+        case Item_Spacer:
+            delete m_spacer;
+            break;
+
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }
+
+    m_kind = Item_None;
+}
+
+wxSize wxSizerItem::GetSpacer() const
+{
+    wxSize size;
+    if ( m_kind == Item_Spacer )
+        size = m_spacer->GetSize();
+
+    return size;

 }
 
 
 }
 
 

-wxSize wxSizerItem::GetSize()
+wxSize wxSizerItem::GetSize() const

 {
     wxSize ret;
 {
     wxSize ret;

-    if (IsSizer())
-        ret = m_sizer->GetSize();
-    else
-    if (IsWindow())
-        ret = m_window->GetSize();
-    else ret = m_size;
+    switch ( m_kind )
+    {
+        case Item_None:
+            break;
+
+        case Item_Window:
+            ret = m_window->GetSize();
+            break;
+
+        case Item_Sizer:
+            ret = m_sizer->GetSize();
+            break;
+
+        case Item_Spacer:
+            ret = m_spacer->GetSize();
+            break;
+
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }

 
     if (m_flag & wxWEST)
         ret.x += m_border;
 
     if (m_flag & wxWEST)
         ret.x += m_border;


@@ -129,49 +333,108 @@ wxSize wxSizerItem::GetSize()
     return ret;
 }
 
     return ret;
 }
 

+bool wxSizerItem::InformFirstDirection(int direction, int size, int availableOtherDir)
+{
+    // The size that come here will be including borders. Child items should get it
+    // without borders.
+    if( size>0 )
+    {
+        if( direction==wxHORIZONTAL )
+        {
+            if (m_flag & wxWEST)
+                size -= m_border;
+            if (m_flag & wxEAST)
+                size -= m_border;
+        }
+        else if( direction==wxVERTICAL )
+        {
+            if (m_flag & wxNORTH)
+                size -= m_border;
+            if (m_flag & wxSOUTH)
+                size -= m_border;
+        }
+    }
+
+    bool didUse = false;
+    // Pass the information along to the held object
+    if (IsSizer())
+    {
+        didUse = GetSizer()->InformFirstDirection(direction,size,availableOtherDir);
+        if (didUse)
+            m_minSize = GetSizer()->CalcMin();
+    }
+    else if (IsWindow())
+    {
+        didUse =  GetWindow()->InformFirstDirection(direction,size,availableOtherDir);
+        if (didUse)
+            m_minSize = m_window->GetEffectiveMinSize();
+
+        // This information is useful for items with wxSHAPED flag, since
+        // we can request an optimal min size for such an item. Even if
+        // we overwrite the m_minSize member here, we can read it back from
+        // the owned window (happens automatically).
+        if( (m_flag & wxSHAPED) && (m_flag & wxEXPAND) && direction )
+        {
+            if( !wxIsNullDouble(m_ratio) )
+            {
+                wxCHECK_MSG( (m_proportion==0), false, wxT("Shaped item, non-zero proportion in wxSizerItem::InformFirstDirection()") );
+                if( direction==wxHORIZONTAL && !wxIsNullDouble(m_ratio) )
+                {
+                    // Clip size so that we don't take too much
+                    if( availableOtherDir>=0 && int(size/m_ratio)-m_minSize.y>availableOtherDir )
+                        size = int((availableOtherDir+m_minSize.y)*m_ratio);
+                    m_minSize = wxSize(size,int(size/m_ratio));
+                }
+                else if( direction==wxVERTICAL )
+                {
+                    // Clip size so that we don't take too much
+                    if( availableOtherDir>=0 && int(size*m_ratio)-m_minSize.x>availableOtherDir )
+                        size = int((availableOtherDir+m_minSize.x)/m_ratio);
+                    m_minSize = wxSize(int(size*m_ratio),size);
+                }
+                didUse = true;
+            }
+        }
+    }
+
+    return didUse;
+}
+

 wxSize wxSizerItem::CalcMin()
 {
 wxSize wxSizerItem::CalcMin()
 {

-    wxSize ret;

     if (IsSizer())
     {
     if (IsSizer())
     {

-        ret = m_sizer->GetMinSize();
+        m_minSize = m_sizer->GetMinSize();

 
         // if we have to preserve aspect ratio _AND_ this is
         // the first-time calculation, consider ret to be initial size
 
         // if we have to preserve aspect ratio _AND_ this is
         // the first-time calculation, consider ret to be initial size

-        if ((m_flag & wxSHAPED) && !m_ratio)
-            SetRatio(ret);
+        if ( (m_flag & wxSHAPED) && wxIsNullDouble(m_ratio) )
+            SetRatio(m_minSize);

     }
     }

-    else
+    else if ( IsWindow() )

     {
     {

-        if ( IsWindow() && (m_flag & wxADJUST_MINSIZE) )
-        {
-            // check if the best (minimal, in fact) window size hadn't changed
-            // by chance: this may happen for, e.g. static text if its label
-            // changed
-            wxSize size = m_window->GetBestSize();
-            if ( size.x > m_minSize.x )
-                m_minSize.x = size.x;
-            if ( size.y > m_minSize.y )
-                m_minSize.y = size.y;
-        }
-
-        ret = m_minSize;
+        // Since the size of the window may change during runtime, we
+        // should use the current minimal/best size.
+        m_minSize = m_window->GetEffectiveMinSize();

     }
 
     }
 

-    if (m_flag & wxWEST)
-        ret.x += m_border;
-    if (m_flag & wxEAST)
-        ret.x += m_border;
-    if (m_flag & wxNORTH)
-        ret.y += m_border;
-    if (m_flag & wxSOUTH)
-        ret.y += m_border;
+    return GetMinSizeWithBorder();
+}

 
 

-    return ret;
+wxSize wxSizerItem::GetMinSizeWithBorder() const
+{
+    return AddBorderToSize(m_minSize);
+}
+
+wxSize wxSizerItem::GetMaxSizeWithBorder() const
+{
+    return AddBorderToSize(GetMaxSize());

 }
 
 }
 

-void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
+void wxSizerItem::SetDimension( const wxPoint& pos_, const wxSize& size_ )

 {
 {

+    wxPoint pos = pos_;
+    wxSize size = size_;

     if (m_flag & wxSHAPED)
     {
         // adjust aspect ratio
     if (m_flag & wxSHAPED)
     {
         // adjust aspect ratio


@@ -223,244 +486,553 @@ void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
         size.y -= m_border;
     }
 
         size.y -= m_border;
     }
 

-    if (IsSizer())
-        m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
+    if (size.x < 0)
+        size.x = 0;
+    if (size.y < 0)
+        size.y = 0;
+
+    m_rect = wxRect(pos, size);
+
+    switch ( m_kind )
+    {
+        case Item_None:
+            wxFAIL_MSG( wxT("can't set size of uninitialized sizer item") );
+            break;
+
+        case Item_Window:
+        {
+            // Use wxSIZE_FORCE_EVENT here since a sizer item might
+            // have changed alignment or some other property which would
+            // not change the size of the window. In such a case, no
+            // wxSizeEvent would normally be generated and thus the
+            // control wouldn't get laid out correctly here.
+#if 1
+            m_window->SetSize(pos.x, pos.y, size.x, size.y,
+                              wxSIZE_ALLOW_MINUS_ONE|wxSIZE_FORCE_EVENT );
+#else
+            m_window->SetSize(pos.x, pos.y, size.x, size.y,
+                              wxSIZE_ALLOW_MINUS_ONE );
+#endif
+            break;
+        }
+        case Item_Sizer:
+            m_sizer->SetDimension(pos, size);
+            break;

 
 

-    if (IsWindow())
-        m_window->SetSize( pos.x, pos.y, size.x, size.y, wxSIZE_ALLOW_MINUS_ONE );
+        case Item_Spacer:
+            m_spacer->SetSize(size);
+            break;

 
 

-    m_size = size;
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }

 }
 
 void wxSizerItem::DeleteWindows()
 {
 }
 
 void wxSizerItem::DeleteWindows()
 {

-    if (m_window)
-         m_window->Destroy();
-         
-    if (m_sizer)
-        m_sizer->DeleteWindows();
+    switch ( m_kind )
+    {
+        case Item_None:
+        case Item_Spacer:
+            break;
+
+        case Item_Window:
+            //We are deleting the window from this sizer - normally
+            //the window destroys the sizer associated with it,
+            //which might destroy this, which we don't want
+            m_window->SetContainingSizer(NULL);
+            m_window->Destroy();
+            //Putting this after the switch will result in a spacer
+            //not being deleted properly on destruction
+            m_kind = Item_None;
+            break;
+
+        case Item_Sizer:
+            m_sizer->DeleteWindows();
+            break;
+
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }
+
+}
+
+void wxSizerItem::Show( bool show )
+{
+    switch ( m_kind )
+    {
+        case Item_None:
+            wxFAIL_MSG( wxT("can't show uninitialized sizer item") );
+            break;
+
+        case Item_Window:
+            m_window->Show(show);
+            break;
+
+        case Item_Sizer:
+            m_sizer->Show(show);
+            break;
+
+        case Item_Spacer:
+            m_spacer->Show(show);
+            break;
+
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }

 }
 
 }
 

-bool wxSizerItem::IsWindow()
+bool wxSizerItem::IsShown() const

 {
 {

-    return (m_window != NULL);
+    if ( m_flag & wxRESERVE_SPACE_EVEN_IF_HIDDEN )
+        return true;
+
+    switch ( m_kind )
+    {
+        case Item_None:
+            // we may be called from CalcMin(), just return false so that we're
+            // not used
+            break;
+
+        case Item_Window:
+            return m_window->IsShown();
+
+        case Item_Sizer:
+            // arbitrarily decide that if at least one of our elements is
+            // shown, so are we (this arbitrariness is the reason for
+            // deprecating this function)
+            return m_sizer->AreAnyItemsShown();
+
+        case Item_Spacer:
+            return m_spacer->IsShown();
+
+        case Item_Max:
+        default:
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
+    }
+
+    return false;

 }
 
 }
 

-bool wxSizerItem::IsSizer()
+#if WXWIN_COMPATIBILITY_2_6
+void wxSizerItem::SetOption( int option )

 {
 {

-    return (m_sizer != NULL);
+    SetProportion( option );

 }
 
 }
 

-bool wxSizerItem::IsSpacer()
+int wxSizerItem::GetOption() const

 {
 {

-    return (m_window == NULL) && (m_sizer == NULL);
+    return GetProportion();

 }
 }

+#endif // WXWIN_COMPATIBILITY_2_6
+

 
 //---------------------------------------------------------------------------
 // wxSizer
 //---------------------------------------------------------------------------
 
 
 //---------------------------------------------------------------------------
 // wxSizer
 //---------------------------------------------------------------------------
 

-wxSizer::wxSizer()
-{
-    m_children.DeleteContents( TRUE );
-    m_minSize.x = 0;
-    m_minSize.y = 0;
-}
-

 wxSizer::~wxSizer()
 {
 wxSizer::~wxSizer()
 {

+    WX_CLEAR_LIST(wxSizerItemList, m_children);

 }
 
 }
 

-void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
+wxSizerItem* wxSizer::DoInsert( size_t index, wxSizerItem *item )

 {
 {

-    m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
-}
+    m_children.Insert( index, item );

 
 

-void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
-{
-    m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
+    if ( item->GetWindow() )
+        item->GetWindow()->SetContainingSizer( this );
+
+    if ( item->GetSizer() )
+        item->GetSizer()->SetContainingWindow( m_containingWindow );
+
+    return item;

 }
 
 }
 

-void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
+void wxSizer::SetContainingWindow(wxWindow *win)

 {
 {

-    m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
+    if ( win == m_containingWindow )
+        return;
+
+    m_containingWindow = win;
+
+    // set the same window for all nested sizers as well, they also are in the
+    // same window
+    for ( wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+          node;
+          node = node->GetNext() )
+    {
+        wxSizerItem *const item = node->GetData();
+        wxSizer *const sizer = item->GetSizer();
+
+        if ( sizer )
+        {
+            sizer->SetContainingWindow(win);
+        }
+    }

 }
 
 }
 

-void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
+#if WXWIN_COMPATIBILITY_2_6
+bool wxSizer::Remove( wxWindow *window )

 {
 {

-    m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
+    return Detach( window );

 }
 }

+#endif // WXWIN_COMPATIBILITY_2_6

 
 

-void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
+bool wxSizer::Remove( wxSizer *sizer )

 {
 {

-    m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
+    wxASSERT_MSG( sizer, wxT("Removing NULL sizer") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetSizer() == sizer)
+        {
+            delete item;
+            m_children.Erase( node );
+            return true;
+        }
+
+        node = node->GetNext();
+    }
+
+    return false;

 }
 
 }
 

-void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
+bool wxSizer::Remove( int index )

 {
 {

-    m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
+    wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
+                 false,
+                 wxT("Remove index is out of range") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
+
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
+
+    delete node->GetData();
+    m_children.Erase( node );
+
+    return true;

 }
 
 }
 

-void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
+bool wxSizer::Detach( wxSizer *sizer )

 {
 {

-    m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
+    wxASSERT_MSG( sizer, wxT("Detaching NULL sizer") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetSizer() == sizer)
+        {
+            item->DetachSizer();
+            delete item;
+            m_children.Erase( node );
+            return true;
+        }
+        node = node->GetNext();
+    }
+
+    return false;

 }
 
 }
 

-void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
+bool wxSizer::Detach( wxWindow *window )

 {
 {

-    m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
+    wxASSERT_MSG( window, wxT("Detaching NULL window") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetWindow() == window)
+        {
+            delete item;
+            m_children.Erase( node );
+            return true;
+        }
+        node = node->GetNext();
+    }
+
+    return false;

 }
 
 }
 

-void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
+bool wxSizer::Detach( int index )

 {
 {

-    m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
+    wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
+                 false,
+                 wxT("Detach index is out of range") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
+
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
+
+    wxSizerItem *item = node->GetData();
+
+    if ( item->IsSizer() )
+        item->DetachSizer();
+
+    delete item;
+    m_children.Erase( node );
+    return true;

 }
 
 }
 

-bool wxSizer::Remove( wxWindow *window )
+bool wxSizer::Replace( wxWindow *oldwin, wxWindow *newwin, bool recursive )

 {
 {

-    wxASSERT( window );
+    wxASSERT_MSG( oldwin, wxT("Replacing NULL window") );
+    wxASSERT_MSG( newwin, wxT("Replacing with NULL window") );

 
 

-    wxNode *node = m_children.First();
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        if (item->GetWindow() == window)
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetWindow() == oldwin)
+        {
+            item->AssignWindow(newwin);
+            newwin->SetContainingSizer( this );
+            return true;
+        }
+        else if (recursive && item->IsSizer())

         {
         {

-            m_children.DeleteNode( node );
-            return TRUE;
+            if (item->GetSizer()->Replace( oldwin, newwin, true ))
+                return true;

         }
         }

-        node = node->Next();
+
+        node = node->GetNext();

     }
 
     }
 

-    return FALSE;
+    return false;

 }
 
 }
 

-bool wxSizer::Remove( wxSizer *sizer )
+bool wxSizer::Replace( wxSizer *oldsz, wxSizer *newsz, bool recursive )

 {
 {

-    wxASSERT( sizer );
+    wxASSERT_MSG( oldsz, wxT("Replacing NULL sizer") );
+    wxASSERT_MSG( newsz, wxT("Replacing with NULL sizer") );

 
 

-    wxNode *node = m_children.First();
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        if (item->GetSizer() == sizer)
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetSizer() == oldsz)
+        {
+            item->AssignSizer(newsz);
+            return true;
+        }
+        else if (recursive && item->IsSizer())

         {
         {

-            m_children.DeleteNode( node );
-            return TRUE;
+            if (item->GetSizer()->Replace( oldsz, newsz, true ))
+                return true;

         }
         }

-        node = node->Next();
+
+        node = node->GetNext();

     }
 
     }
 

-    return FALSE;
+    return false;

 }
 
 }
 

-bool wxSizer::Remove( int pos )
+bool wxSizer::Replace( size_t old, wxSizerItem *newitem )

 {
 {

-    wxNode *node = m_children.Nth( pos );
-    if (!node) return FALSE;
+    wxCHECK_MSG( old < m_children.GetCount(), false, wxT("Replace index is out of range") );
+    wxASSERT_MSG( newitem, wxT("Replacing with NULL item") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.Item( old );
+
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
+
+    wxSizerItem *item = node->GetData();
+    node->SetData(newitem);

 
 

-    m_children.DeleteNode( node );
+    if (item->IsWindow() && item->GetWindow())
+        item->GetWindow()->SetContainingSizer(NULL);

 
 

-    return TRUE;
+    delete item;
+
+    return true;

 }
 
 void wxSizer::Clear( bool delete_windows )
 {
 }
 
 void wxSizer::Clear( bool delete_windows )
 {

+    // First clear the ContainingSizer pointers
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->IsWindow())
+            item->GetWindow()->SetContainingSizer( NULL );
+        node = node->GetNext();
+    }
+
+    // Destroy the windows if needed

     if (delete_windows)
         DeleteWindows();
     if (delete_windows)
         DeleteWindows();

-        
-    m_children.Clear();
+
+    // Now empty the list
+    WX_CLEAR_LIST(wxSizerItemList, m_children);

 }
 
 void wxSizer::DeleteWindows()
 {
 }
 
 void wxSizer::DeleteWindows()
 {

-    wxNode *node = m_children.First();
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
+        wxSizerItem     *item = node->GetData();
+

         item->DeleteWindows();
         item->DeleteWindows();

-        node = node->Next();
+        node = node->GetNext();
+    }
+}
+
+wxSize wxSizer::ComputeFittingClientSize(wxWindow *window)
+{
+    wxCHECK_MSG( window, wxDefaultSize, "window can't be NULL" );
+
+    // take the min size by default and limit it by max size
+    wxSize size = GetMinClientSize(window);
+    wxSize sizeMax;
+
+    wxTopLevelWindow *tlw = wxDynamicCast(window, wxTopLevelWindow);
+    if ( tlw )
+    {
+        // hack for small screen devices where TLWs are always full screen
+        if ( tlw->IsAlwaysMaximized() )
+        {
+            return tlw->GetClientSize();
+        }
+
+        // limit the window to the size of the display it is on
+        int disp = wxDisplay::GetFromWindow(window);
+        if ( disp == wxNOT_FOUND )
+        {
+            // or, if we don't know which one it is, of the main one
+            disp = 0;
+        }
+
+        sizeMax = wxDisplay(disp).GetClientArea().GetSize();
+
+        // If determining the display size failed, skip the max size checks as
+        // we really don't want to create windows of (0, 0) size.
+        if ( !sizeMax.x || !sizeMax.y )
+            return size;
+
+        // space for decorations and toolbars etc.
+        sizeMax = tlw->WindowToClientSize(sizeMax);
+    }
+    else
+    {
+        sizeMax = GetMaxClientSize(window);

     }
     }

+
+    if ( sizeMax.x != wxDefaultCoord && size.x > sizeMax.x )
+            size.x = sizeMax.x;
+    if ( sizeMax.y != wxDefaultCoord && size.y > sizeMax.y )
+            size.y = sizeMax.y;
+
+    return size;
+}
+
+wxSize wxSizer::ComputeFittingWindowSize(wxWindow *window)
+{
+    wxCHECK_MSG( window, wxDefaultSize, "window can't be NULL" );
+
+    return window->ClientToWindowSize(ComputeFittingClientSize(window));
+}
+
+wxSize wxSizer::Fit( wxWindow *window )
+{
+    wxCHECK_MSG( window, wxDefaultSize, "window can't be NULL" );
+
+    // set client size
+    window->SetClientSize(ComputeFittingClientSize(window));
+
+    // return entire size
+    return window->GetSize();

 }
 
 }
 

-void wxSizer::Fit( wxWindow *window )
+void wxSizer::FitInside( wxWindow *window )

 {
     wxSize size;
     if (window->IsTopLevel())
 {
     wxSize size;
     if (window->IsTopLevel())

-        size = FitSize( window );
+        size = VirtualFitSize( window );

     else
     else

-        size = GetMinWindowSize( window );
+        size = GetMinClientSize( window );

 
 

-    window->SetSize( size );
+    window->SetVirtualSize( size );

 }
 
 void wxSizer::Layout()
 {
 }
 
 void wxSizer::Layout()
 {

+    // (re)calculates minimums needed for each item and other preparations
+    // for layout

     CalcMin();
     CalcMin();

+
+    // Applies the layout and repositions/resizes the items
+    wxWindow::ChildrenRepositioningGuard repositionGuard(m_containingWindow);
+

     RecalcSizes();
 }
 
 void wxSizer::SetSizeHints( wxWindow *window )
 {
     RecalcSizes();
 }
 
 void wxSizer::SetSizeHints( wxWindow *window )
 {

-    wxSize size = FitSize( window );
-    window->SetSizeHints( size.x, size.y );
-}
+    // Preserve the window's max size hints, but set the
+    // lower bound according to the sizer calculations.

 
 

-wxSize wxSizer::GetMaxWindowSize( wxWindow *WXUNUSED(window) )
-{
-    wxRect rect = wxGetClientDisplayRect();
-    wxSize sizeMax (rect.width,rect.height);
+    // This is equivalent to calling Fit(), except that we need to set
+    // the size hints _in between_ the two steps performed by Fit
+    // (1. ComputeFittingClientSize, 2. SetClientSize). That's because
+    // otherwise SetClientSize() could have no effect if there already are
+    // size hints in effect that forbid requested client size.

 
 

-    // Sorry, but this bit is wrong -- it makes a window that should just be
-    // able to fit onto the screen, not fit on the screen. -- JACS
-#if 0
-    // Make the max size a bit smaller than the visible portion of
-    // the screen.  A window which takes the entire screen doesn't
-    // look very nice either
-    sizeMax.x *= 9;
-    sizeMax.x /= 10;
+    const wxSize clientSize = ComputeFittingClientSize(window);

 
 

-    sizeMax.y *= 9;
-    sizeMax.y /= 10;
-#endif
+    window->SetMinClientSize(clientSize);
+    window->SetClientSize(clientSize);
+}
+
+#if WXWIN_COMPATIBILITY_2_8
+void wxSizer::SetVirtualSizeHints( wxWindow *window )
+{
+    FitInside( window );
+}
+#endif // WXWIN_COMPATIBILITY_2_8

 
 

-    return sizeMax;
+// TODO on mac we need a function that determines how much free space this
+// min size contains, in order to make sure that we have 20 pixels of free
+// space around the controls
+wxSize wxSizer::GetMaxClientSize( wxWindow *window ) const
+{
+    return window->WindowToClientSize(window->GetMaxSize());

 }
 
 }
 

-wxSize wxSizer::GetMinWindowSize( wxWindow *window )
+wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )

 {
 {

-    wxSize minSize( GetMinSize() );
-    wxSize size( window->GetSize() );
-    wxSize client_size( window->GetClientSize() );
-    return wxSize( minSize.x+size.x-client_size.x,
-                   minSize.y+size.y-client_size.y );
+    return GetMinSize();  // Already returns client size.

 }
 
 }
 

-// Return a window size that will fit within the screens dimensions
-wxSize wxSizer::FitSize( wxWindow *window )
+wxSize wxSizer::VirtualFitSize( wxWindow *window )

 {
 {

-    wxSize size     = GetMinWindowSize( window );
-    wxSize sizeMax  = GetMaxWindowSize( window );
+    wxSize size     = GetMinClientSize( window );
+    wxSize sizeMax  = GetMaxClientSize( window );

 
 

-    if ( size.x > sizeMax.x )
+    // Limit the size if sizeMax != wxDefaultSize
+
+    if ( size.x > sizeMax.x && sizeMax.x != wxDefaultCoord )

         size.x = sizeMax.x;
         size.x = sizeMax.x;

-    if ( size.y > sizeMax.y )
+    if ( size.y > sizeMax.y && sizeMax.y != wxDefaultCoord )

         size.y = sizeMax.y;
 
     return size;
 }
 
         size.y = sizeMax.y;
 
     return size;
 }
 

-void wxSizer::SetDimension( int x, int y, int width, int height )
-{
-    m_position.x = x;
-    m_position.y = y;
-    m_size.x = width;
-    m_size.y = height;
-    CalcMin();
-    RecalcSizes();
-}
-
-wxSize wxSizer::GetMinSize()
+wxSize wxSizer::GetMinSize()

 {
     wxSize ret( CalcMin() );
     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 {
     wxSize ret( CalcMin() );
     if (ret.x < m_minSize.x) ret.x = m_minSize.x;


@@ -476,128 +1048,392 @@ void wxSizer::DoSetMinSize( int width, int height )
 
 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 {
 
 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 {

-    wxASSERT( window );
+    wxASSERT_MSG( window, wxT("SetMinSize for NULL window") );

 
 

-    wxNode *node = m_children.First();
+    // Is it our immediate child?
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
+        wxSizerItem     *item = node->GetData();
+

         if (item->GetWindow() == window)
         {
         if (item->GetWindow() == window)
         {

-            item->SetInitSize( width, height );
-            return TRUE;
+            item->SetMinSize( width, height );
+            return true;

         }
         }

-        node = node->Next();
+        node = node->GetNext();

     }
 
     }
 

-    node = m_children.First();
+    // No?  Search any subsizers we own then
+
+    node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        if (item->GetSizer())
+        wxSizerItem     *item = node->GetData();
+
+        if ( item->GetSizer() &&
+             item->GetSizer()->DoSetItemMinSize( window, width, height ) )

         {
         {

-            /* It's a sizer, so lets search recursively. */
-            if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
-            {
-                /* A child sizer found the requested windw, exit. */
-                return TRUE;
-            }
+            // A child sizer found the requested windw, exit.
+            return true;

         }
         }

-        node = node->Next();
+        node = node->GetNext();

     }
 
     }
 

-    return FALSE;
+    return false;

 }
 
 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 {
 }
 
 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 {

-    wxASSERT( sizer );
+    wxASSERT_MSG( sizer, wxT("SetMinSize for NULL sizer") );

 
 

-    wxNode *node = m_children.First();
+    // Is it our immediate child?
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
+        wxSizerItem     *item = node->GetData();
+

         if (item->GetSizer() == sizer)
         {
             item->GetSizer()->DoSetMinSize( width, height );
         if (item->GetSizer() == sizer)
         {
             item->GetSizer()->DoSetMinSize( width, height );

-            return TRUE;
+            return true;

         }
         }

-        node = node->Next();
+        node = node->GetNext();

     }
 
     }
 

-    node = m_children.First();
+    // No?  Search any subsizers we own then
+
+    node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        if (item->GetSizer())
+        wxSizerItem     *item = node->GetData();
+
+        if ( item->GetSizer() &&
+             item->GetSizer()->DoSetItemMinSize( sizer, width, height ) )

         {
         {

-            /* It's a sizer, so lets search recursively. */
-            if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
-            {
-                /* A child sizer found the requested windw, exit. */
-                return TRUE;
-            }
+            // A child found the requested sizer, exit.
+            return true;

         }
         }

-        node = node->Next();
+        node = node->GetNext();

     }
 
     }
 

-    return FALSE;
+    return false;

 }
 
 }
 

-bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
+bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )

 {
 {

-    wxNode *node = m_children.Nth( pos );
-    if (!node) return FALSE;
+    wxSizerItemList::compatibility_iterator node = m_children.Item( index );
+
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
+
+    wxSizerItem     *item = node->GetData();

 
 

-    wxSizerItem *item = (wxSizerItem*) node->Data();

     if (item->GetSizer())
     {
     if (item->GetSizer())
     {

-        /* Sizers contains the minimal size in them, if not calculated ... */
+        // Sizers contains the minimal size in them, if not calculated ...

         item->GetSizer()->DoSetMinSize( width, height );
     }
     else
     {
         item->GetSizer()->DoSetMinSize( width, height );
     }
     else
     {

-        /* ... whereas the minimal size of spacers and windows in stored
-           in the item */
-        item->SetInitSize( width, height );
+        // ... but the minimal size of spacers and windows is stored via the item
+        item->SetMinSize( width, height );
+    }
+
+    return true;
+}
+
+wxSizerItem* wxSizer::GetItem( wxWindow *window, bool recursive )
+{
+    wxASSERT_MSG( window, wxT("GetItem for NULL window") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetWindow() == window)
+        {
+            return item;
+        }
+        else if (recursive && item->IsSizer())
+        {
+            wxSizerItem *subitem = item->GetSizer()->GetItem( window, true );
+            if (subitem)
+                return subitem;
+        }
+
+        node = node->GetNext();
+    }
+
+    return NULL;
+}
+
+wxSizerItem* wxSizer::GetItem( wxSizer *sizer, bool recursive )
+{
+    wxASSERT_MSG( sizer, wxT("GetItem for NULL sizer") );
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem *item = node->GetData();
+
+        if (item->GetSizer() == sizer)
+        {
+            return item;
+        }
+        else if (recursive && item->IsSizer())
+        {
+            wxSizerItem *subitem = item->GetSizer()->GetItem( sizer, true );
+            if (subitem)
+                return subitem;
+        }
+
+        node = node->GetNext();
+    }
+
+    return NULL;
+}
+
+wxSizerItem* wxSizer::GetItem( size_t index )
+{
+    wxCHECK_MSG( index < m_children.GetCount(),
+                 NULL,
+                 wxT("GetItem index is out of range") );
+
+    return m_children.Item( index )->GetData();
+}
+
+wxSizerItem* wxSizer::GetItemById( int id, bool recursive )
+{
+    // This gets a sizer item by the id of the sizer item
+    // and NOT the id of a window if the item is a window.
+
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetId() == id)
+        {
+            return item;
+        }
+        else if (recursive && item->IsSizer())
+        {
+            wxSizerItem *subitem = item->GetSizer()->GetItemById( id, true );
+            if (subitem)
+                return subitem;
+        }
+
+        node = node->GetNext();

     }
 
     }
 

-    return TRUE;
+    return NULL;

 }
 
 }
 

+bool wxSizer::Show( wxWindow *window, bool show, bool recursive )
+{
+    wxSizerItem *item = GetItem( window, recursive );
+
+    if ( item )
+    {
+         item->Show( show );
+         return true;
+    }
+
+    return false;
+}
+
+bool wxSizer::Show( wxSizer *sizer, bool show, bool recursive )
+{
+    wxSizerItem *item = GetItem( sizer, recursive );
+
+    if ( item )
+    {
+         item->Show( show );
+         return true;
+    }
+
+    return false;
+}
+
+bool wxSizer::Show( size_t index, bool show)
+{
+    wxSizerItem *item = GetItem( index );
+
+    if ( item )
+    {
+         item->Show( show );
+         return true;
+    }
+
+    return false;
+}
+
+void wxSizer::ShowItems( bool show )
+{
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        node->GetData()->Show( show );
+        node = node->GetNext();
+    }
+}
+
+bool wxSizer::AreAnyItemsShown() const
+{
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        if ( node->GetData()->IsShown() )
+            return true;
+        node = node->GetNext();
+    }
+
+    return false;
+}
+
+bool wxSizer::IsShown( wxWindow *window ) const
+{
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetWindow() == window)
+        {
+            return item->IsShown();
+        }
+        node = node->GetNext();
+    }
+
+    wxFAIL_MSG( wxT("IsShown failed to find sizer item") );
+
+    return false;
+}
+
+bool wxSizer::IsShown( wxSizer *sizer ) const
+{
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+
+        if (item->GetSizer() == sizer)
+        {
+            return item->IsShown();
+        }
+        node = node->GetNext();
+    }
+
+    wxFAIL_MSG( wxT("IsShown failed to find sizer item") );
+
+    return false;
+}
+
+bool wxSizer::IsShown( size_t index ) const
+{
+    wxCHECK_MSG( index < m_children.GetCount(),
+                 false,
+                 wxT("IsShown index is out of range") );
+
+    return m_children.Item( index )->GetData()->IsShown();
+}
+
+

 //---------------------------------------------------------------------------
 // wxGridSizer
 //---------------------------------------------------------------------------
 
 //---------------------------------------------------------------------------
 // wxGridSizer
 //---------------------------------------------------------------------------
 

+wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
+    : m_rows( cols == 0 ? 1 : 0 ),
+      m_cols( cols ),
+      m_vgap( vgap ),
+      m_hgap( hgap )
+{
+    wxASSERT(cols >= 0);
+}
+
+wxGridSizer::wxGridSizer( int cols, const wxSize& gap )
+    : m_rows( cols == 0 ? 1 : 0 ),
+      m_cols( cols ),
+      m_vgap( gap.GetHeight() ),
+      m_hgap( gap.GetWidth() )
+{
+    wxASSERT(cols >= 0);
+}
+

 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )

+    : m_rows( rows || cols ? rows : 1 ),
+      m_cols( cols ),
+      m_vgap( vgap ),
+      m_hgap( hgap )

 {
 {

-    m_rows = rows;
-    m_cols = cols;
-    m_vgap = vgap;
-    m_hgap = hgap;
+    wxASSERT(rows >= 0 && cols >= 0);

 }
 
 }
 

-wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
+wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )
+    : m_rows( rows || cols ? rows : 1 ),
+      m_cols( cols ),
+      m_vgap( gap.GetHeight() ),
+      m_hgap( gap.GetWidth() )

 {
 {

-    m_rows = 0;
-    m_cols = cols;
-    m_vgap = vgap;
-    m_hgap = hgap;
+    wxASSERT(rows >= 0 && cols >= 0);

 }
 
 }
 

-void wxGridSizer::RecalcSizes()
+wxSizerItem *wxGridSizer::DoInsert(size_t index, wxSizerItem *item)

 {
 {

-    if (m_children.GetCount() == 0)
-        return;
+    // if only the number of columns or the number of rows is specified for a
+    // sizer, arbitrarily many items can be added to it but if both of them are
+    // fixed, then the sizer can't have more than that many items -- check for
+    // this here to ensure that we detect errors as soon as possible
+    if ( m_cols && m_rows )
+    {
+        const int nitems = m_children.GetCount();
+        if ( nitems == m_cols*m_rows )
+        {
+            wxFAIL_MSG(
+                wxString::Format(
+                    "too many items (%d > %d*%d) in grid sizer (maybe you "
+                    "should omit the number of either rows or columns?)",
+                nitems + 1, m_cols, m_rows)
+            );
+
+            // additionally, continuing to use the specified number of columns
+            // and rows is not a good idea as callers of CalcRowsCols() expect
+            // that all sizer items can fit into m_cols-/m_rows-sized arrays
+            // which is not the case if there are too many items and results in
+            // crashes, so let it compute the number of rows automatically by
+            // forgetting the (wrong) number of rows specified (this also has a
+            // nice side effect of giving only one assert even if there are
+            // many more items than allowed in this sizer)
+            m_rows = 0;
+        }
+    }
+
+    return wxSizer::DoInsert(index, item);
+}
+
+int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
+{
+    const int nitems = m_children.GetCount();

 
 

-    int nitems = m_children.GetCount();
-    int nrows = m_rows;
-    int ncols = m_cols;
+    ncols = GetEffectiveColsCount();
+    nrows = GetEffectiveRowsCount();

 
 

-    if (ncols > 0)
-        nrows = (nitems + ncols-1) / ncols;
-    else
-        ncols = (nitems + nrows-1) / nrows;
+    // Since Insert() checks for overpopulation, the following
+    // should only assert if the grid was shrunk via SetRows() / SetCols()
+    wxASSERT_MSG( nitems <= ncols*nrows, "logic error in wxGridSizer" );
+
+    return nitems;
+}
+
+void wxGridSizer::RecalcSizes()
+{
+    int nitems, nrows, ncols;
+    if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
+        return;

 
     wxSize sz( GetSize() );
     wxPoint pt( GetPosition() );
 
     wxSize sz( GetSize() );
     wxPoint pt( GetPosition() );


@@ -614,10 +1450,11 @@ void wxGridSizer::RecalcSizes()
             int i = r * ncols + c;
             if (i < nitems)
             {
             int i = r * ncols + c;
             if (i < nitems)
             {

-                wxNode *node = m_children.Nth( i );
-                wxASSERT( node );
+                wxSizerItemList::compatibility_iterator node = m_children.Item( i );
+
+                wxASSERT_MSG( node, wxT("Failed to find SizerItemList node") );

 
 

-                SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
+                SetItemBounds( node->GetData(), x, y, w, h);

             }
             y = y + h + m_vgap;
         }
             }
             y = y + h + m_vgap;
         }


@@ -627,41 +1464,63 @@ void wxGridSizer::RecalcSizes()
 
 wxSize wxGridSizer::CalcMin()
 {
 
 wxSize wxGridSizer::CalcMin()
 {

-    if (m_children.GetCount() == 0)
-        return wxSize(10,10);
+    int nrows, ncols;
+    if ( CalcRowsCols(nrows, ncols) == 0 )
+        return wxSize();

 
 

-    int nitems = m_children.GetCount();
-    int nrows = m_rows;
-    int ncols = m_cols;
-
-    if (ncols > 0)
-        nrows = (nitems + ncols-1) / ncols;
-    else
-        ncols = (nitems + nrows-1) / nrows;
-
-    /* Find the max width and height for any component */
+    // Find the max width and height for any component

     int w = 0;
     int h = 0;
 
     int w = 0;
     int h = 0;
 

-    wxNode *node = m_children.First();
+    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();

     while (node)
     {
     while (node)
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        wxSize sz( item->CalcMin() );
+        wxSizerItem     *item = node->GetData();
+        wxSize           sz( item->CalcMin() );
+

         w = wxMax( w, sz.x );
         h = wxMax( h, sz.y );
 
         w = wxMax( w, sz.x );
         h = wxMax( h, sz.y );
 

-        node = node->Next();
+        node = node->GetNext();

     }
 
     }
 

-    return wxSize(ncols * w + (ncols-1) * m_hgap,
-                  nrows * h + (nrows-1) * m_vgap);
+    // In case we have a nested sizer with a two step algo , give it
+    // a chance to adjust to that (we give it width component)
+    node = m_children.GetFirst();
+    bool didChangeMinSize = false;
+    while (node)
+    {
+        wxSizerItem     *item = node->GetData();
+        didChangeMinSize |= item->InformFirstDirection( wxHORIZONTAL, w, -1 );
+
+        node = node->GetNext();
+    }
+
+    // And redo iteration in case min size changed
+    if( didChangeMinSize )
+    {
+        node = m_children.GetFirst();
+        w = h = 0;
+        while (node)
+        {
+            wxSizerItem     *item = node->GetData();
+            wxSize           sz( item->GetMinSizeWithBorder() );
+
+            w = wxMax( w, sz.x );
+            h = wxMax( h, sz.y );
+
+            node = node->GetNext();
+        }
+    }
+
+    return wxSize( ncols * w + (ncols-1) * m_hgap,
+                   nrows * h + (nrows-1) * m_vgap );

 }
 
 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 {
     wxPoint pt( x,y );
 }
 
 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 {
     wxPoint pt( x,y );

-    wxSize sz( item->CalcMin() );
+    wxSize sz( item->GetMinSizeWithBorder() );

     int flag = item->GetFlag();
 
     if ((flag & wxEXPAND) || (flag & wxSHAPED))
     int flag = item->GetFlag();
 
     if ((flag & wxEXPAND) || (flag & wxSHAPED))


@@ -696,355 +1555,891 @@ void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 // wxFlexGridSizer
 //---------------------------------------------------------------------------
 
 // wxFlexGridSizer
 //---------------------------------------------------------------------------
 

+wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
+               : wxGridSizer( cols, vgap, hgap ),
+                 m_flexDirection(wxBOTH),
+                 m_growMode(wxFLEX_GROWMODE_SPECIFIED)
+{
+}
+
+wxFlexGridSizer::wxFlexGridSizer( int cols, const wxSize& gap )
+               : wxGridSizer( cols, gap ),
+                 m_flexDirection(wxBOTH),
+                 m_growMode(wxFLEX_GROWMODE_SPECIFIED)
+{
+}
+

 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )

-   : wxGridSizer( rows, cols, vgap, hgap )
+               : wxGridSizer( rows, cols, vgap, hgap ),
+                 m_flexDirection(wxBOTH),
+                 m_growMode(wxFLEX_GROWMODE_SPECIFIED)

 {
 {

-    m_rowHeights = (int*) NULL;
-    m_colWidths = (int*) NULL;

 }
 
 }
 

-wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
-   : wxGridSizer( cols, vgap, hgap )
+wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, const wxSize& gap )
+               : wxGridSizer( rows, cols, gap ),
+                 m_flexDirection(wxBOTH),
+                 m_growMode(wxFLEX_GROWMODE_SPECIFIED)

 {
 {

-    m_rowHeights = (int*) NULL;
-    m_colWidths = (int*) NULL;

 }
 
 wxFlexGridSizer::~wxFlexGridSizer()
 {
 }
 
 wxFlexGridSizer::~wxFlexGridSizer()
 {

-    if (m_rowHeights)
-        delete[] m_rowHeights;
-    if (m_colWidths)
-        delete[] m_colWidths;

 }
 
 }
 

-void wxFlexGridSizer::CreateArrays()
+void wxFlexGridSizer::RecalcSizes()

 {
 {

-    if (m_rowHeights)
-        delete[] m_rowHeights;
-    if (m_colWidths)
-        delete[] m_colWidths;
-
-    if (m_children.GetCount() == 0)
+    int nrows, ncols;
+    if ( !CalcRowsCols(nrows, ncols) )

         return;
 
         return;
 

-    int nitems = m_children.GetCount();
-    int nrows = m_rows;
-    int ncols = m_cols;
+    const wxPoint pt(GetPosition());
+    const wxSize sz(GetSize());

 
 

-    if (ncols > 0)
-        nrows = (nitems + ncols-1) / ncols;
-    else
-        ncols = (nitems + nrows-1) / nrows;
+    AdjustForGrowables(sz);
+
+    wxSizerItemList::const_iterator i = m_children.begin();
+    const wxSizerItemList::const_iterator end = m_children.end();
+
+    int y = 0;
+    for ( int r = 0; r < nrows; r++ )
+    {
+        if ( m_rowHeights[r] == -1 )
+        {
+            // this row is entirely hidden, skip it
+            for ( int c = 0; c < ncols; c++ )
+            {
+                if ( i == end )
+                    return;
+
+                ++i;
+            }
+
+            continue;
+        }
+
+        const int hrow = m_rowHeights[r];
+        int h = sz.y - y; // max remaining height, don't overflow it
+        if ( hrow < h )
+            h = hrow;
+
+        int x = 0;
+        for ( int c = 0; c < ncols && i != end; c++, ++i )
+        {
+            const int wcol = m_colWidths[c];
+
+            if ( wcol == -1 )
+                continue;
+
+            int w = sz.x - x; // max possible value, ensure we don't overflow
+            if ( wcol < w )
+                w = wcol;
+
+            SetItemBounds(*i, pt.x + x, pt.y + y, w, h);
+
+            x += wcol + m_hgap;
+        }

 
 

-    m_rowHeights = new int[nrows];
-    m_colWidths = new int[ncols];
+        if ( i == end )
+            return;

 
 

-    for (int col = 0; col < ncols; col++)
-        m_colWidths[ col ] = 0;
-    for (int row = 0; row < nrows; row++)
-        m_rowHeights[ row ] = 0;
+        y += hrow + m_vgap;
+    }

 }
 
 }
 

-void wxFlexGridSizer::RecalcSizes()
+// helper function used in CalcMin() to sum up the sizes of non-hidden items
+static int SumArraySizes(const wxArrayInt& sizes, int gap)

 {
 {

-    if (m_children.GetCount() == 0)
-        return;
+    // Sum total minimum size, including gaps between rows/columns.
+    // -1 is used as a magic number meaning empty row/column.
+    int total = 0;

 
 

-    int nitems = m_children.GetCount();
-    int nrows = m_rows;
-    int ncols = m_cols;
+    const size_t count = sizes.size();
+    for ( size_t n = 0; n < count; n++ )
+    {
+        if ( sizes[n] != -1 )
+        {
+            if ( total )
+                total += gap; // separate from the previous column

 
 

-    if (ncols > 0)
-        nrows = (nitems + ncols-1) / ncols;
-    else
-        ncols = (nitems + nrows-1) / nrows;
+            total += sizes[n];
+        }
+    }

 
 

-    wxSize sz( GetSize() );
-    wxSize minsz( CalcMin() );
-    wxPoint pt( GetPosition() );
-    int    delta;
-    size_t idx;
+    return total;
+}
+
+void wxFlexGridSizer::FindWidthsAndHeights(int nrows, int ncols)
+{
+    // We have to recalculate the sizes in case the item minimum size has
+    // changed since the previous layout, or the item has been hidden using
+    // wxSizer::Show(). If all the items in a row/column are hidden, the final
+    // dimension of the row/column will be -1, indicating that the column
+    // itself is hidden.
+    m_rowHeights.assign(nrows, -1);
+    m_colWidths.assign(ncols, -1);

 
 

-    if ((m_growableRows.GetCount() > 0) && (sz.y > minsz.y))
+    // n is the index of the item in left-to-right top-to-bottom order
+    size_t n = 0;
+    for ( wxSizerItemList::iterator i = m_children.begin();
+          i != m_children.end();
+          ++i, ++n )

     {
     {

-        delta = (sz.y - minsz.y) / m_growableRows.GetCount();
-        for (idx = 0; idx < m_growableRows.GetCount(); idx++)
-            m_rowHeights[ m_growableRows[idx] ] += delta;
+        wxSizerItem * const item = *i;
+        if ( item->IsShown() )
+        {
+            // NOTE: Not doing the calculation here, this is just
+            // for finding max values.
+            const wxSize sz(item->GetMinSizeWithBorder());
+
+            const int row = n / ncols;
+            const int col = n % ncols;
+
+            if ( sz.y > m_rowHeights[row] )
+                m_rowHeights[row] = sz.y;
+            if ( sz.x > m_colWidths[col] )
+                m_colWidths[col] = sz.x;
+        }

     }
 
     }
 

-    if ((m_growableCols.GetCount() > 0) && (sz.x > minsz.x))
+    AdjustForFlexDirection();
+
+    m_calculatedMinSize = wxSize(SumArraySizes(m_colWidths, m_hgap),
+                                 SumArraySizes(m_rowHeights, m_vgap));
+}
+
+wxSize wxFlexGridSizer::CalcMin()
+{
+    int nrows,
+        ncols;
+
+    // Number of rows/columns can change as items are added or removed.
+    if ( !CalcRowsCols(nrows, ncols) )
+        return wxSize();
+
+
+    // We have to recalculate the sizes in case the item minimum size has
+    // changed since the previous layout, or the item has been hidden using
+    // wxSizer::Show(). If all the items in a row/column are hidden, the final
+    // dimension of the row/column will be -1, indicating that the column
+    // itself is hidden.
+    m_rowHeights.assign(nrows, -1);
+    m_colWidths.assign(ncols, -1);
+
+    for ( wxSizerItemList::iterator i = m_children.begin();
+          i != m_children.end();
+          ++i)

     {
     {

-        delta = (sz.x - minsz.x) / m_growableCols.GetCount();
-        for (idx = 0; idx < m_growableCols.GetCount(); idx++)
-            m_colWidths[ m_growableCols[idx] ] += delta;
+        wxSizerItem * const item = *i;
+        if ( item->IsShown() )
+        {
+            item->CalcMin();
+        }

     }
 
     }
 

-    sz = wxSize( pt.x + sz.x, pt.y + sz.y );
+    // The stage of looking for max values in each row/column has been
+    // made a separate function, since it's reused in AdjustForGrowables.
+    FindWidthsAndHeights(nrows,ncols);

 
 

-    int x = pt.x;
-    for (int c = 0; c < ncols; c++)
+    return m_calculatedMinSize;
+}
+
+void wxFlexGridSizer::AdjustForFlexDirection()
+{
+    // the logic in CalcMin works when we resize flexibly in both directions
+    // but maybe this is not the case
+    if ( m_flexDirection != wxBOTH )

     {
     {

-        int y = pt.y;
-        for (int r = 0; r < nrows; r++)
+        // select the array corresponding to the direction in which we do *not*
+        // resize flexibly
+        wxArrayInt& array = m_flexDirection == wxVERTICAL ? m_colWidths
+                                                          : m_rowHeights;
+
+        const size_t count = array.GetCount();
+
+        // find the largest value in this array
+        size_t n;
+        int largest = 0;
+
+        for ( n = 0; n < count; ++n )

         {
         {

-            int i = r * ncols + c;
-            if (i < nitems)
-            {
-                wxNode *node = m_children.Nth( i );
-                wxASSERT( node );
+            if ( array[n] > largest )
+                largest = array[n];
+        }

 
 

-                int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
-                int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
+        // and now fill it with the largest value
+        for ( n = 0; n < count; ++n )
+        {
+            // don't touch hidden rows
+            if ( array[n] != -1 )
+                array[n] = largest;
+        }
+    }
+}

 
 

-                SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
-            }
-            y = y + m_rowHeights[r] + m_vgap;
+// helper of AdjustForGrowables() which is called for rows/columns separately
+//
+// parameters:
+//      delta: the extra space, we do nothing unless it's positive
+//      growable: indices or growable rows/cols in sizes array
+//      sizes: the height/widths of rows/cols to adjust
+//      proportions: proportions of the growable rows/cols or NULL if they all
+//                   should be assumed to have proportion of 1
+static void
+DoAdjustForGrowables(int delta,
+                     const wxArrayInt& growable,
+                     wxArrayInt& sizes,
+                     const wxArrayInt *proportions)
+{
+    if ( delta <= 0 )
+        return;
+
+    // total sum of proportions of all non-hidden rows
+    int sum_proportions = 0;
+
+    // number of currently shown growable rows
+    int num = 0;
+
+    const int max_idx = sizes.size();
+
+    const size_t count = growable.size();
+    size_t idx;
+    for ( idx = 0; idx < count; idx++ )
+    {
+        // Since the number of rows/columns can change as items are
+        // inserted/deleted, we need to verify at runtime that the
+        // requested growable rows/columns are still valid.
+        if ( growable[idx] >= max_idx )
+            continue;
+
+        // If all items in a row/column are hidden, that row/column will
+        // have a dimension of -1.  This causes the row/column to be
+        // hidden completely.
+        if ( sizes[growable[idx]] == -1 )
+            continue;
+
+        if ( proportions )
+            sum_proportions += (*proportions)[idx];
+
+        num++;
+    }
+
+    if ( !num )
+        return;
+
+    // the remaining extra free space, adjusted during each iteration
+    for ( idx = 0; idx < count; idx++ )
+    {
+        if ( growable[idx] >= max_idx )
+            continue;
+
+        if ( sizes[ growable[idx] ] == -1 )
+            continue;
+
+        int cur_delta;
+        if ( sum_proportions == 0 )
+        {
+            // no growable rows -- divide extra space evenly among all
+            cur_delta = delta/num;
+            num--;
+        }
+        else // allocate extra space proportionally
+        {
+            const int cur_prop = (*proportions)[idx];
+            cur_delta = (delta*cur_prop)/sum_proportions;
+            sum_proportions -= cur_prop;

         }
         }

-        x = x + m_colWidths[c] + m_hgap;
+
+        sizes[growable[idx]] += cur_delta;
+        delta -= cur_delta;

     }
 }
 
     }
 }
 

-wxSize wxFlexGridSizer::CalcMin()
+void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)

 {
 {

-    if (m_children.GetCount() == 0)
-        return wxSize(10,10);
+#if wxDEBUG_LEVEL
+    // by the time this function is called, the sizer should be already fully
+    // initialized and hence the number of its columns and rows is known and we
+    // can check that all indices in m_growableCols/Rows are valid (see also
+    // comments in AddGrowableCol/Row())
+    if ( !m_rows || !m_cols )
+    {
+        if ( !m_rows )
+        {
+            int nrows = CalcRows();

 
 

-    int nitems = m_children.GetCount();
-    int nrows = m_rows;
-    int ncols = m_cols;
+            for ( size_t n = 0; n < m_growableRows.size(); n++ )
+            {
+                wxASSERT_MSG( m_growableRows[n] < nrows,
+                              "invalid growable row index" );
+            }
+        }

 
 

-    if (ncols > 0)
-        nrows = (nitems + ncols-1) / ncols;
-    else
-        ncols = (nitems + nrows-1) / nrows;
+        if ( !m_cols )
+        {
+            int ncols = CalcCols();

 
 

-    CreateArrays();
+            for ( size_t n = 0; n < m_growableCols.size(); n++ )
+            {
+                wxASSERT_MSG( m_growableCols[n] < ncols,
+                              "invalid growable column index" );
+            }
+        }
+    }
+#endif // wxDEBUG_LEVEL

 
 

-    int col;
-    int row;

 
 

-    int i = 0;
-    wxNode *node = m_children.First();
-    while (node)
+    if ( (m_flexDirection & wxHORIZONTAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )

     {
     {

-        wxSizerItem *item = (wxSizerItem*)node->Data();
-        wxSize sz( item->CalcMin() );
-        row = i / ncols;
-        col = i % ncols;
-        m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
-        m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
+        DoAdjustForGrowables
+        (
+            sz.x - m_calculatedMinSize.x,
+            m_growableCols,
+            m_colWidths,
+            m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableColsProportions
+                                                    : NULL
+        );
+
+        // This gives nested objects that benefit from knowing one size
+        // component in advance the chance to use that.
+        bool didAdjustMinSize = false;
+
+        // Iterate over all items and inform about column width
+        const int ncols = GetEffectiveColsCount();
+        int col = 0;
+        for ( wxSizerItemList::iterator i = m_children.begin();
+              i != m_children.end();
+              ++i )
+        {
+            didAdjustMinSize |= (*i)->InformFirstDirection(wxHORIZONTAL, m_colWidths[col], sz.y - m_calculatedMinSize.y);
+            if ( ++col == ncols )
+                col = 0;
+        }

 
 

-        node = node->Next();
-        i++;
+        // Only redo if info was actually used
+        if( didAdjustMinSize )
+        {
+            DoAdjustForGrowables
+            (
+                sz.x - m_calculatedMinSize.x,
+                m_growableCols,
+                m_colWidths,
+                m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableColsProportions
+                                                        : NULL
+            );
+        }

     }
 
     }
 

-    int width = 0;
-    for (col = 0; col < ncols; col++)
-        width += m_colWidths[ col ];
+    if ( (m_flexDirection & wxVERTICAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
+    {
+        // pass NULL instead of proportions if the grow mode is ALL as we
+        // should treat all rows as having proportion of 1 then
+        DoAdjustForGrowables
+        (
+            sz.y - m_calculatedMinSize.y,
+            m_growableRows,
+            m_rowHeights,
+            m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableRowsProportions
+                                                    : NULL
+        );
+    }
+}

 
 

-    int height = 0;
-    for (row = 0; row < nrows; row++)
-        height += m_rowHeights[ row ];
+bool wxFlexGridSizer::IsRowGrowable( size_t idx )
+{
+    return m_growableRows.Index( idx ) != wxNOT_FOUND;
+}

 
 

-    return wxSize( width +  (ncols-1) * m_hgap,
-                   height + (nrows-1) * m_vgap);
+bool wxFlexGridSizer::IsColGrowable( size_t idx )
+{
+    return m_growableCols.Index( idx ) != wxNOT_FOUND;

 }
 
 }
 

-void wxFlexGridSizer::AddGrowableRow( size_t idx )
+void wxFlexGridSizer::AddGrowableRow( size_t idx, int proportion )

 {
 {

+    wxASSERT_MSG( !IsRowGrowable( idx ),
+                  "AddGrowableRow() called for growable row" );
+
+    // notice that we intentionally don't check the index validity here in (the
+    // common) case when the number of rows was not specified in the ctor -- in
+    // this case it will be computed only later, when all items are added to
+    // the sizer, and the check will be done in AdjustForGrowables()
+    wxCHECK_RET( !m_rows || idx < (size_t)m_rows, "invalid row index" );
+

     m_growableRows.Add( idx );
     m_growableRows.Add( idx );

+    m_growableRowsProportions.Add( proportion );

 }
 
 }
 

-void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
+void wxFlexGridSizer::AddGrowableCol( size_t idx, int proportion )

 {
 {

+    wxASSERT_MSG( !IsColGrowable( idx ),
+                  "AddGrowableCol() called for growable column" );
+
+    // see comment in AddGrowableRow(): although it's less common to omit the
+    // specification of the number of columns, it still can also happen
+    wxCHECK_RET( !m_cols || idx < (size_t)m_cols, "invalid column index" );
+
+    m_growableCols.Add( idx );
+    m_growableColsProportions.Add( proportion );

 }
 
 }
 

-void wxFlexGridSizer::AddGrowableCol( size_t idx )
+// helper function for RemoveGrowableCol/Row()
+static void
+DoRemoveFromArrays(size_t idx, wxArrayInt& items, wxArrayInt& proportions)

 {
 {

-    m_growableCols.Add( idx );
+    const size_t count = items.size();
+    for ( size_t n = 0; n < count; n++ )
+    {
+        if ( (size_t)items[n] == idx )
+        {
+            items.RemoveAt(n);
+            proportions.RemoveAt(n);
+            return;
+        }
+    }
+
+    wxFAIL_MSG( wxT("column/row is already not growable") );
+}
+
+void wxFlexGridSizer::RemoveGrowableCol( size_t idx )
+{
+    DoRemoveFromArrays(idx, m_growableCols, m_growableColsProportions);

 }
 
 }
 

-void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
+void wxFlexGridSizer::RemoveGrowableRow( size_t idx )

 {
 {

+    DoRemoveFromArrays(idx, m_growableRows, m_growableRowsProportions);

 }
 
 //---------------------------------------------------------------------------
 // wxBoxSizer
 //---------------------------------------------------------------------------
 
 }
 
 //---------------------------------------------------------------------------
 // wxBoxSizer
 //---------------------------------------------------------------------------
 

-wxBoxSizer::wxBoxSizer( int orient )
+wxSizerItem *wxBoxSizer::AddSpacer(int size)

 {
 {

-    m_orient = orient;
+    return IsVertical() ? Add(0, size) : Add(size, 0);

 }
 
 }
 

-void wxBoxSizer::RecalcSizes()
+namespace

 {
 {

-    if (m_children.GetCount() == 0)
-        return;

 
 

-    int delta = 0;
-    int extra = 0;
-    if (m_stretchable)
+/*
+    Helper of RecalcSizes(): checks if there is enough remaining space for the
+    min size of the given item and returns its min size or the entire remaining
+    space depending on which one is greater.
+
+    This function updates the remaining space parameter to account for the size
+    effectively allocated to the item.
+ */
+int
+GetMinOrRemainingSize(int orient, const wxSizerItem *item, int *remainingSpace_)
+{
+    int& remainingSpace = *remainingSpace_;
+
+    wxCoord size;
+    if ( remainingSpace > 0 )

     {
     {

-        if (m_orient == wxHORIZONTAL)
+        const wxSize sizeMin = item->GetMinSizeWithBorder();
+        size = orient == wxHORIZONTAL ? sizeMin.x : sizeMin.y;
+
+        if ( size >= remainingSpace )

         {
         {

-            delta = (m_size.x - m_fixedWidth) / m_stretchable;
-            extra = (m_size.x - m_fixedWidth) % m_stretchable;
+            // truncate the item to fit in the remaining space, this is better
+            // than showing it only partially in general, even if both choices
+            // are bad -- but there is nothing else we can do
+            size = remainingSpace;

         }
         }

-        else
+
+        remainingSpace -= size;
+    }
+    else // no remaining space
+    {
+        // no space at all left, no need to even query the item for its min
+        // size as we can't give it to it anyhow
+        size = 0;
+    }
+
+    return size;
+}
+
+} // anonymous namespace
+
+void wxBoxSizer::RecalcSizes()
+{
+    if ( m_children.empty() )
+        return;
+
+    const wxCoord totalMinorSize = GetSizeInMinorDir(m_size);
+    const wxCoord totalMajorSize = GetSizeInMajorDir(m_size);
+
+    // the amount of free space which we should redistribute among the
+    // stretchable items (i.e. those with non zero proportion)
+    int delta = totalMajorSize - GetSizeInMajorDir(m_minSize);
+
+    // declare loop variables used below:
+    wxSizerItemList::const_iterator i;  // iterator in m_children list
+    unsigned n = 0;                     // item index in majorSizes array
+
+
+    // First, inform item about the available size in minor direction as this
+    // can change their size in the major direction. Also compute the number of
+    // visible items and sum of their min sizes in major direction.
+
+    int minMajorSize = 0;
+    for ( i = m_children.begin(); i != m_children.end(); ++i )
+    {
+        wxSizerItem * const item = *i;
+
+        if ( !item->IsShown() )
+            continue;
+
+        wxSize szMinPrev = item->GetMinSizeWithBorder();
+        item->InformFirstDirection(m_orient^wxBOTH,totalMinorSize,delta);
+        wxSize szMin = item->GetMinSizeWithBorder();
+        int deltaChange = GetSizeInMajorDir(szMin-szMinPrev);
+        if( deltaChange )

         {
         {

-            delta = (m_size.y - m_fixedHeight) / m_stretchable;
-            extra = (m_size.y - m_fixedHeight) % m_stretchable;
+            // Since we passed available space along to the item, it should not
+            // take too much, so delta should not become negative.
+            delta -= deltaChange;

         }
         }

+        minMajorSize += GetSizeInMajorDir(item->GetMinSizeWithBorder());

     }
 
     }
 

-    wxPoint pt( m_position );
+    // update our min size have changed
+    SizeInMajorDir(m_minSize) = minMajorSize;

 
 

-    wxNode *node = m_children.GetFirst();
-    while (node)
+
+    // space and sum of proportions for the remaining items, both may change
+    // below
+    wxCoord remaining = totalMajorSize;
+    int totalProportion = m_totalProportion;
+
+    // size of the (visible) items in major direction, -1 means "not fixed yet"
+    wxVector<int> majorSizes(GetItemCount(), wxDefaultCoord);
+
+
+    // Check for the degenerated case when we don't have enough space for even
+    // the min sizes of all the items: in this case we really can't do much
+    // more than to allocate the min size to as many of fixed size items as
+    // possible (on the assumption that variable size items such as text zones
+    // or list boxes may use scrollbars to show their content even if their
+    // size is less than min size but that fixed size items such as buttons
+    // will suffer even more if we don't give them their min size)
+    if ( totalMajorSize < minMajorSize )

     {
     {

-        wxSizerItem *item = (wxSizerItem*) node->Data();
+        // Second degenerated case pass: allocate min size to all fixed size
+        // items.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )
+        {
+            wxSizerItem * const item = *i;

 
 

-        int weight = 1;
-        if (item->GetOption())
-            weight = item->GetOption();
+            if ( !item->IsShown() )
+                continue;

 
 

-        wxSize size( item->CalcMin() );
+            // deal with fixed size items only during this pass
+            if ( item->GetProportion() )
+                continue;

 
 

-        if (m_orient == wxVERTICAL)
+            majorSizes[n] = GetMinOrRemainingSize(m_orient, item, &remaining);
+        }
+
+
+        // Third degenerated case pass: allocate min size to all the remaining,
+        // i.e. non-fixed size, items.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )

         {
         {

-            wxCoord height = size.y;
-            if (item->GetOption())
+            wxSizerItem * const item = *i;
+
+            if ( !item->IsShown() )
+                continue;
+
+            // we've already dealt with fixed size items above
+            if ( !item->GetProportion() )
+                continue;
+
+            majorSizes[n] = GetMinOrRemainingSize(m_orient, item, &remaining);
+        }
+    }
+    else // we do have enough space to give at least min sizes to all items
+    {
+        // Second and maybe more passes in the non-degenerated case: deal with
+        // fixed size items and items whose min size is greater than what we
+        // would allocate to them taking their proportion into account. For
+        // both of them, we will just use their min size, but for the latter we
+        // also need to reexamine all the items as the items which fitted
+        // before we adjusted their size upwards might not fit any more. This
+        // does make for a quadratic algorithm but it's not obvious how to
+        // avoid it and hopefully it's not a huge problem in practice as the
+        // sizers don't have many items usually (and, of course, the algorithm
+        // still reduces into a linear one if there is enough space for all the
+        // min sizes).
+        bool nonFixedSpaceChanged = false;
+        for ( i = m_children.begin(), n = 0; ; ++i, ++n )
+        {
+            if ( nonFixedSpaceChanged )

             {
             {

-                height = (delta * weight) + extra;
-                extra = 0; // only the first item will get the remainder as extra size
+                i = m_children.begin();
+                n = 0;
+                nonFixedSpaceChanged = false;

             }
 
             }
 

-            wxPoint child_pos( pt );
-            wxSize  child_size( wxSize( size.x, height) );
+            // check for the end of the loop only after the check above as
+            // otherwise we wouldn't do another pass if the last child resulted
+            // in non fixed space reduction
+            if ( i == m_children.end() )
+                break;
+
+            wxSizerItem * const item = *i;
+
+            if ( !item->IsShown() )
+                continue;
+
+            // don't check the item which we had already dealt with during a
+            // previous pass (this is more than an optimization, the code
+            // wouldn't work correctly if we kept adjusting for the same item
+            // over and over again)
+            if ( majorSizes[n] != wxDefaultCoord )
+                continue;
+
+            wxCoord minMajor = GetSizeInMajorDir(item->GetMinSizeWithBorder());
+
+            // it doesn't make sense for min size to be negative but right now
+            // it's possible to create e.g. a spacer with (-1, 10) as size and
+            // people do it in their code apparently (see #11842) so ensure
+            // that we don't use this -1 as real min size as it conflicts with
+            // the meaning we use for it here and negative min sizes just don't
+            // make sense anyhow (which is why it might be a better idea to
+            // deal with them at wxSizerItem level in the future but for now
+            // this is the minimal fix for the bug)
+            if ( minMajor < 0 )
+                minMajor = 0;
+
+            const int propItem = item->GetProportion();
+            if ( propItem )
+            {
+                // is the desired size of this item big enough?
+                if ( (remaining*propItem)/totalProportion >= minMajor )
+                {
+                    // yes, it is, we'll determine the real size of this
+                    // item later, for now just leave it as wxDefaultCoord
+                    continue;
+                }
+
+                // the proportion of this item won't count, it has
+                // effectively become fixed
+                totalProportion -= propItem;
+            }

 
 

-            if (item->GetFlag() & (wxEXPAND | wxSHAPED))
-                child_size.x = m_size.x;
-            else if (item->GetFlag() & wxALIGN_RIGHT)
-                child_pos.x += m_size.x - size.x;
-            else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
-            // XXX wxCENTER is added for backward compatibility;
-            //     wxALIGN_CENTER should be used in new code
-                child_pos.x += (m_size.x - size.x) / 2;
+            // we can already allocate space for this item
+            majorSizes[n] = minMajor;

 
 

-            item->SetDimension( child_pos, child_size );
+            // change the amount of the space remaining to the other items,
+            // as this can result in not being able to satisfy their
+            // proportions any more we will need to redo another loop
+            // iteration
+            remaining -= minMajor;

 
 

-            pt.y += height;
+            nonFixedSpaceChanged = true;

         }
         }

-        else
+
+        // Similar to the previous loop, but dealing with items whose max size
+        // is less than what we would allocate to them taking their proportion
+        // into account.
+        nonFixedSpaceChanged = false;
+        for ( i = m_children.begin(), n = 0; ; ++i, ++n )

         {
         {

-            wxCoord width = size.x;
-            if (item->GetOption())
+            if ( nonFixedSpaceChanged )

             {
             {

-                width = (delta * weight) + extra;
-                extra = 0; // only the first item will get the remainder as extra size
+                i = m_children.begin();
+                n = 0;
+                nonFixedSpaceChanged = false;

             }
 
             }
 

-            wxPoint child_pos( pt );
-            wxSize  child_size( wxSize(width, size.y) );
+            // check for the end of the loop only after the check above as
+            // otherwise we wouldn't do another pass if the last child resulted
+            // in non fixed space reduction
+            if ( i == m_children.end() )
+                break;
+
+            wxSizerItem * const item = *i;
+
+            if ( !item->IsShown() )
+                continue;

 
 

-            if (item->GetFlag() & (wxEXPAND | wxSHAPED))
-                child_size.y = m_size.y;
-            else if (item->GetFlag() & wxALIGN_BOTTOM)
-                child_pos.y += m_size.y - size.y;
-            else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
-            // XXX wxCENTER is added for backward compatibility;
-            //     wxALIGN_CENTER should be used in new code
-                child_pos.y += (m_size.y - size.y) / 2;
+            // don't check the item which we had already dealt with during a
+            // previous pass (this is more than an optimization, the code
+            // wouldn't work correctly if we kept adjusting for the same item
+            // over and over again)
+            if ( majorSizes[n] != wxDefaultCoord )
+                continue;

 
 

-            item->SetDimension( child_pos, child_size );
+            wxCoord maxMajor = GetSizeInMajorDir(item->GetMaxSizeWithBorder());

 
 

-            pt.x += width;
+            // must be nonzero, fixed-size items were dealt with in previous loop
+            const int propItem = item->GetProportion();
+
+            // is the desired size of this item small enough?
+            if ( maxMajor < 0 ||
+                    (remaining*propItem)/totalProportion <= maxMajor )
+            {
+                // yes, it is, we'll determine the real size of this
+                // item later, for now just leave it as wxDefaultCoord
+                continue;
+            }
+
+            // the proportion of this item won't count, it has
+            // effectively become fixed
+            totalProportion -= propItem;
+
+            // we can already allocate space for this item
+            majorSizes[n] = maxMajor;
+
+            // change the amount of the space remaining to the other items,
+            // as this can result in not being able to satisfy their
+            // proportions any more we will need to redo another loop
+            // iteration
+            remaining -= maxMajor;
+
+            nonFixedSpaceChanged = true;

         }
 
         }
 

-        node = node->Next();
+        // Last by one pass: distribute the remaining space among the non-fixed
+        // items whose size weren't fixed yet according to their proportions.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )
+        {
+            wxSizerItem * const item = *i;
+
+            if ( !item->IsShown() )
+                continue;
+
+            if ( majorSizes[n] == wxDefaultCoord )
+            {
+                const int propItem = item->GetProportion();
+                majorSizes[n] = (remaining*propItem)/totalProportion;
+
+                remaining -= majorSizes[n];
+                totalProportion -= propItem;
+            }
+        }

     }
     }

-}

 
 

-wxSize wxBoxSizer::CalcMin()
-{
-    if (m_children.GetCount() == 0)
-        return wxSize(10,10);

 
 

-    m_stretchable = 0;
-    m_minWidth = 0;
-    m_minHeight = 0;
-    m_fixedWidth = 0;
-    m_fixedHeight = 0;
+    // the position at which we put the next child
+    wxPoint pt(m_position);

 
 

-    // Find how long each stretch unit needs to be
-    int stretchSize = 1;
-    wxNode *node = m_children.GetFirst();
-    while (node)
-    {
-        wxSizerItem *item = (wxSizerItem*) node->Data();
-        if (item->GetOption() != 0)
-        {
-            int stretch = item->GetOption();
-            wxSize size( item->CalcMin() );
-            int sizePerStretch;
-            // Integer division rounded up is (a + b - 1) / b
-            if (m_orient == wxHORIZONTAL)
-                sizePerStretch = ( size.x + stretch - 1 ) / stretch;
-            else
-                sizePerStretch = ( size.y + stretch - 1 ) / stretch;
-            if (sizePerStretch > stretchSize)
-                stretchSize = sizePerStretch;
-        }
-        node = node->Next();
-    }
-       // Calculate overall minimum size
-       node = m_children.GetFirst();
-    while (node)
+
+    // Final pass: finally do position the items correctly using their sizes as
+    // determined above.
+    for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )

     {
     {

-        wxSizerItem *item = (wxSizerItem*) node->Data();
+        wxSizerItem * const item = *i;
+
+        if ( !item->IsShown() )
+            continue;
+
+        const int majorSize = majorSizes[n];

 
 

-        m_stretchable += item->GetOption();
+        const wxSize sizeThis(item->GetMinSizeWithBorder());

 
 

-        wxSize size( item->CalcMin() );
-        if (item->GetOption() != 0)
+        // apply the alignment in the minor direction
+        wxPoint posChild(pt);
+
+        wxCoord minorSize = GetSizeInMinorDir(sizeThis);
+        const int flag = item->GetFlag();
+        if ( (flag & (wxEXPAND | wxSHAPED)) || (minorSize > totalMinorSize) )

         {
         {

-            if (m_orient == wxHORIZONTAL)
-                size.x = stretchSize * item->GetOption();
-            else
-                size.y = stretchSize * item->GetOption();
+            // occupy all the available space if wxEXPAND was given and also if
+            // the item is too big to fit -- in this case we truncate it below
+            // its minimal size which is bad but better than not showing parts
+            // of the window at all
+            minorSize = totalMinorSize;
+
+            // do not allow the size in the minor direction to grow beyond the max
+            // size of the item in the minor direction
+            const wxCoord maxMinorSize = GetSizeInMinorDir(item->GetMaxSizeWithBorder());
+            if ( maxMinorSize >= 0 && minorSize > maxMinorSize )
+                minorSize = maxMinorSize;

         }
 
         }
 

-        if (m_orient == wxHORIZONTAL)
+        if ( flag & (IsVertical() ? wxALIGN_RIGHT : wxALIGN_BOTTOM) )

         {
         {

-            m_minWidth += size.x;
-            m_minHeight = wxMax( m_minHeight, size.y );
+            PosInMinorDir(posChild) += totalMinorSize - minorSize;

         }
         }

-        else
+        // NB: wxCENTRE is used here only for backwards compatibility,
+        //     wxALIGN_CENTRE should be used in new code
+        else if ( flag & (wxCENTER | (IsVertical() ? wxALIGN_CENTRE_HORIZONTAL
+                                                   : wxALIGN_CENTRE_VERTICAL)) )

         {
         {

-            m_minHeight += size.y;
-            m_minWidth = wxMax( m_minWidth, size.x );
+            PosInMinorDir(posChild) += (totalMinorSize - minorSize) / 2;

         }
 
         }
 

-        if (item->GetOption() == 0)
+
+        // apply RTL adjustment for horizontal sizers:
+        if ( !IsVertical() && m_containingWindow )

         {
         {

-            if (m_orient == wxVERTICAL)
-            {
-                m_fixedHeight += size.y;
-                m_fixedWidth = wxMax( m_fixedWidth, size.x );
-            }
-            else
-            {
-                m_fixedWidth += size.x;
-                m_fixedHeight = wxMax( m_fixedHeight, size.y );
-            }
+            posChild.x = m_containingWindow->AdjustForLayoutDirection
+                                             (
+                                                posChild.x,
+                                                majorSize,
+                                                m_size.x
+                                             );

         }
 
         }
 

-        node = node->Next();
+        // finally set size of this child and advance to the next one
+        item->SetDimension(posChild, SizeFromMajorMinor(majorSize, minorSize));
+
+        PosInMajorDir(pt) += majorSize;
+    }
+}
+
+wxSize wxBoxSizer::CalcMin()
+{
+    m_totalProportion = 0;
+    m_minSize = wxSize(0, 0);
+
+    // The minimal size for the sizer should be big enough to allocate its
+    // element at least its minimal size but also, and this is the non trivial
+    // part, to respect the children proportion. To satisfy the latter
+    // condition we must find the greatest min-size-to-proportion ratio for all
+    // elements with non-zero proportion.
+    float maxMinSizeToProp = 0.;
+    for ( wxSizerItemList::const_iterator i = m_children.begin();
+          i != m_children.end();
+          ++i )
+    {
+        wxSizerItem * const item = *i;
+
+        if ( !item->IsShown() )
+            continue;
+
+        const wxSize sizeMinThis = item->CalcMin();
+        if ( const int propThis = item->GetProportion() )
+        {
+            float minSizeToProp = GetSizeInMajorDir(sizeMinThis);
+            minSizeToProp /= propThis;
+
+            if ( minSizeToProp > maxMinSizeToProp )
+                maxMinSizeToProp = minSizeToProp;
+
+            m_totalProportion += item->GetProportion();
+        }
+        else // fixed size item
+        {
+            // Just account for its size directly
+            SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
+        }
+
+        // In the transversal direction we just need to find the maximum.
+        if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
+            SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);

     }
 
     }
 

-    return wxSize( m_minWidth, m_minHeight );
+    // Using the max ratio ensures that the min size is big enough for all
+    // items to have their min size and satisfy the proportions among them.
+    SizeInMajorDir(m_minSize) += (int)(maxMinSizeToProp*m_totalProportion);
+
+    return m_minSize;

 }
 
 //---------------------------------------------------------------------------
 }
 
 //---------------------------------------------------------------------------


@@ -1054,42 +2449,71 @@ wxSize wxBoxSizer::CalcMin()
 #if wxUSE_STATBOX
 
 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
 #if wxUSE_STATBOX
 
 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )

-                : wxBoxSizer( orient )
+    : wxBoxSizer( orient ),
+      m_staticBox( box )

 {
     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
 
 {
     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
 

-    m_staticBox = box;
+    // do this so that our Detach() is called if the static box is destroyed
+    // before we are
+    m_staticBox->SetContainingSizer(this);

 }
 
 }
 

-static void GetStaticBoxBorders(wxStaticBox *box,
-                                int *borderTop, int *borderOther)
+wxStaticBoxSizer::wxStaticBoxSizer(int orient, wxWindow *win, const wxString& s)
+                : wxBoxSizer(orient),
+                  m_staticBox(new wxStaticBox(win, wxID_ANY, s))

 {
 {

-    // this has to be done platform by platform as there is no way to
-    // guess the thickness of a wxStaticBox border
-#ifdef __WXGTK__
-    if ( box->GetLabel().IsEmpty() )
-        *borderTop = 5;
-    else
-#endif // __WXGTK__
-        *borderTop = 15;
-       (void)box;
-    *borderOther = 5;
+    // same as above
+    m_staticBox->SetContainingSizer(this);
+}
+
+wxStaticBoxSizer::~wxStaticBoxSizer()
+{
+    delete m_staticBox;

 }
 
 void wxStaticBoxSizer::RecalcSizes()
 {
     int top_border, other_border;
 }
 
 void wxStaticBoxSizer::RecalcSizes()
 {
     int top_border, other_border;

-    GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
+    m_staticBox->GetBordersForSizer(&top_border, &other_border);

 
     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
 
 
     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
 

-    wxPoint old_pos( m_position );
-    m_position.x += other_border;
-    m_position.y += top_border;

     wxSize old_size( m_size );
     m_size.x -= 2*other_border;
     m_size.y -= top_border + other_border;
 
     wxSize old_size( m_size );
     m_size.x -= 2*other_border;
     m_size.y -= top_border + other_border;
 

+    wxPoint old_pos( m_position );
+    if (m_staticBox->GetChildren().GetCount() > 0)
+    {
+#if defined( __WXGTK20__ )
+        // if the wxStaticBox has created a wxPizza to contain its children
+        // (see wxStaticBox::AddChild) then we need to place the items it contains
+        // in the wxBoxSizer::RecalcSizes() call below using coordinates relative
+        // to the top-left corner of the staticbox:
+        m_position.x = m_position.y = 0;
+#elif defined(__WXOSX__) && wxOSX_USE_COCOA
+        // the distance from the 'inner' content view to the embedded controls
+        // this is independent of the title, therefore top_border is not relevant
+        m_position.x = m_position.y = 10;
+#else
+        // if the wxStaticBox has children, then these windows must be placed
+        // by the wxBoxSizer::RecalcSizes() call below using coordinates relative
+        // to the top-left corner of the staticbox (but unlike wxGTK, we need
+        // to keep in count the static borders here!):
+        m_position.x = other_border;
+        m_position.y = top_border;
+#endif
+    }
+    else
+    {
+        // the windows contained in the staticbox have been created as siblings of the
+        // staticbox (this is the "old" way of staticbox contents creation); in this
+        // case we need to position them with coordinates relative to our common parent
+        m_position.x += other_border;
+        m_position.y += top_border;
+    }
+

     wxBoxSizer::RecalcSizes();
 
     m_position = old_pos;
     wxBoxSizer::RecalcSizes();
 
     m_position = old_pos;


@@ -1099,70 +2523,249 @@ void wxStaticBoxSizer::RecalcSizes()
 wxSize wxStaticBoxSizer::CalcMin()
 {
     int top_border, other_border;
 wxSize wxStaticBoxSizer::CalcMin()
 {
     int top_border, other_border;

-    GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
+    m_staticBox->GetBordersForSizer(&top_border, &other_border);

 
     wxSize ret( wxBoxSizer::CalcMin() );
     ret.x += 2*other_border;
 
     wxSize ret( wxBoxSizer::CalcMin() );
     ret.x += 2*other_border;

+
+    // ensure that we're wide enough to show the static box label (there is no
+    // need to check for the static box best size in vertical direction though)
+    const int boxWidth = m_staticBox->GetBestSize().x;
+    if ( ret.x < boxWidth )
+        ret.x = boxWidth;
+

     ret.y += other_border + top_border;
 
     return ret;
 }
 
     ret.y += other_border + top_border;
 
     return ret;
 }
 

+void wxStaticBoxSizer::ShowItems( bool show )
+{
+    m_staticBox->Show( show );
+    wxBoxSizer::ShowItems( show );
+}
+
+bool wxStaticBoxSizer::AreAnyItemsShown() const
+{
+    // We don't need to check the status of our child items: if the box is
+    // shown, this sizer should be considered shown even if all its elements
+    // are hidden (or, more prosaically, there are no elements at all). And,
+    // conversely, if the box is hidden then all our items, which are its
+    // children, are hidden too.
+    return m_staticBox->IsShown();
+}
+
+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
 
 //---------------------------------------------------------------------------
 #endif // wxUSE_STATBOX
 
 //---------------------------------------------------------------------------

-// wxNotebookSizer
+// wxStdDialogButtonSizer

 //---------------------------------------------------------------------------
 
 //---------------------------------------------------------------------------
 

-#if wxUSE_NOTEBOOK
+#if wxUSE_BUTTON
+
+wxStdDialogButtonSizer::wxStdDialogButtonSizer()
+    : wxBoxSizer(wxHORIZONTAL)
+{
+    // Vertical buttons with lots of space on either side
+    // looks rubbish on WinCE, so let's not do this for now.
+    // If we are going to use vertical buttons, we should
+    // put the sizer to the right of other controls in the dialog,
+    // and that's beyond the scope of this sizer.
+#ifndef __WXWINCE__
+    bool is_pda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
+    // If we have a PDA screen, put yes/no button over
+    // all other buttons, otherwise on the left side.
+    if (is_pda)
+        m_orient = wxVERTICAL;
+#endif
+
+    m_buttonAffirmative = NULL;
+    m_buttonApply = NULL;
+    m_buttonNegative = NULL;
+    m_buttonCancel = NULL;
+    m_buttonHelp = NULL;
+}

 
 

-wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
+void wxStdDialogButtonSizer::AddButton(wxButton *mybutton)

 {
 {

-    wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
+    switch (mybutton->GetId())
+    {
+        case wxID_OK:
+        case wxID_YES:
+        case wxID_SAVE:
+            m_buttonAffirmative = mybutton;
+            break;
+        case wxID_APPLY:
+            m_buttonApply = mybutton;
+            break;
+        case wxID_NO:
+            m_buttonNegative = mybutton;
+            break;
+        case wxID_CANCEL:
+        case wxID_CLOSE:
+            m_buttonCancel = mybutton;
+            break;
+        case wxID_HELP:
+        case wxID_CONTEXT_HELP:
+            m_buttonHelp = mybutton;
+            break;
+        default:
+            break;
+    }
+}

 
 

-    m_notebook = nb;
+void wxStdDialogButtonSizer::SetAffirmativeButton( wxButton *button )
+{
+    m_buttonAffirmative = button;

 }
 
 }
 

-void wxNotebookSizer::RecalcSizes()
+void wxStdDialogButtonSizer::SetNegativeButton( wxButton *button )

 {
 {

-    m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
+    m_buttonNegative = button;

 }
 
 }
 

-wxSize wxNotebookSizer::CalcMin()
+void wxStdDialogButtonSizer::SetCancelButton( wxButton *button )

 {
 {

-    wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
+    m_buttonCancel = button;
+}

 
 

-    sizeBorder.x += 5;
-    sizeBorder.y += 5;
+void wxStdDialogButtonSizer::Realize()
+{
+#ifdef __WXMAC__
+        Add(0, 0, 0, wxLEFT, 6);
+        if (m_buttonHelp)
+            Add((wxWindow*)m_buttonHelp, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 6);

 
 

-    if (m_notebook->GetChildren().GetCount() == 0)
-    {
-        return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
-    }
+        if (m_buttonNegative){
+            // HIG POLICE BULLETIN - destructive buttons need extra padding
+            // 24 pixels on either side
+            Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 12);
+        }

 
 

-    int maxX = 0;
-    int maxY = 0;
+        // extra whitespace between help/negative and cancel/ok buttons
+        Add(0, 0, 1, wxEXPAND, 0);

 
 

-    wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
-    while (node)
-    {
-        wxWindow *item = node->GetData();
-        wxSizer *itemsizer = item->GetSizer();
+        if (m_buttonCancel){
+            Add((wxWindow*)m_buttonCancel, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 6);
+            // Cancel or help should be default
+            // m_buttonCancel->SetDefaultButton();
+        }

 
 

-        if (itemsizer)
-        {
-            wxSize subsize( itemsizer->CalcMin() );
+        // Ugh, Mac doesn't really have apply dialogs, so I'll just
+        // figure the best place is between Cancel and OK
+        if (m_buttonApply)
+            Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 6);
+
+        if (m_buttonAffirmative){
+            Add((wxWindow*)m_buttonAffirmative, 0, wxALIGN_CENTRE | wxLEFT, 6);

 
 

-            if (subsize.x > maxX)
-                maxX = subsize.x;
-            if (subsize.y > maxY)
-                maxY = subsize.y;
+            if (m_buttonAffirmative->GetId() == wxID_SAVE){
+                // these buttons have set labels under Mac so we should use them
+                m_buttonAffirmative->SetLabel(_("Save"));
+                if (m_buttonNegative)
+                    m_buttonNegative->SetLabel(_("Don't Save"));
+            }

         }
 
         }
 

-        node = node->GetNext();
-    }
+        // Extra space around and at the right
+        Add(12, 40);
+#elif defined(__WXGTK20__)
+        // http://library.gnome.org/devel/hig-book/stable/windows-alert.html.en
+        // says that the correct button order is
+        //
+        //      [Help]                  [Alternative] [Cancel] [Affirmative]
+
+        // Flags ensuring that margins between the buttons are 6 pixels.
+        const wxSizerFlags
+            flagsBtn = wxSizerFlags().Centre().Border(wxLEFT | wxRIGHT, 3);
+
+        // Margin around the entire sizer button should be 12.
+        AddSpacer(9);
+
+        if (m_buttonHelp)
+            Add(m_buttonHelp, flagsBtn);
+
+        // Align the rest of the buttons to the right.
+        AddStretchSpacer();
+
+        if (m_buttonNegative)
+            Add(m_buttonNegative, flagsBtn);
+
+        if (m_buttonApply)
+            Add(m_buttonApply, flagsBtn);
+
+        if (m_buttonCancel)
+            Add(m_buttonCancel, flagsBtn);
+
+        if (m_buttonAffirmative)
+            Add(m_buttonAffirmative, flagsBtn);
+
+        // Ensure that the right margin is 12 as well.
+        AddSpacer(9);
+#elif defined(__WXMSW__)
+        // Windows
+
+        // right-justify buttons
+        Add(0, 0, 1, wxEXPAND, 0);
+
+        if (m_buttonAffirmative){
+            Add((wxWindow*)m_buttonAffirmative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonAffirmative->ConvertDialogToPixels(wxSize(2, 0)).x);
+        }

 
 

-    return wxSize( maxX, maxY ) + sizeBorder;
+        if (m_buttonNegative){
+            Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonNegative->ConvertDialogToPixels(wxSize(2, 0)).x);
+        }
+
+        if (m_buttonCancel){
+            Add((wxWindow*)m_buttonCancel, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonCancel->ConvertDialogToPixels(wxSize(2, 0)).x);
+        }
+        if (m_buttonApply)
+            Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonApply->ConvertDialogToPixels(wxSize(2, 0)).x);
+
+        if (m_buttonHelp)
+            Add((wxWindow*)m_buttonHelp, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonHelp->ConvertDialogToPixels(wxSize(2, 0)).x);
+#else
+        // GTK+1 and any other platform
+
+        // Add(0, 0, 0, wxLEFT, 5); // Not sure what this was for but it unbalances the dialog
+        if (m_buttonHelp)
+            Add((wxWindow*)m_buttonHelp, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonHelp->ConvertDialogToPixels(wxSize(4, 0)).x);
+
+        // extra whitespace between help and cancel/ok buttons
+        Add(0, 0, 1, wxEXPAND, 0);
+
+        if (m_buttonApply)
+            Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonApply->ConvertDialogToPixels(wxSize(4, 0)).x);
+
+        if (m_buttonAffirmative){
+            Add((wxWindow*)m_buttonAffirmative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonAffirmative->ConvertDialogToPixels(wxSize(4, 0)).x);
+        }
+
+        if (m_buttonNegative){
+            Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonNegative->ConvertDialogToPixels(wxSize(4, 0)).x);
+        }
+
+        if (m_buttonCancel){
+            Add((wxWindow*)m_buttonCancel, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, m_buttonCancel->ConvertDialogToPixels(wxSize(4, 0)).x);
+            // Cancel or help should be default
+            // m_buttonCancel->SetDefaultButton();
+        }
+
+#endif

 }
 
 }
 

-#endif // wxUSE_NOTEBOOK
+#endif // wxUSE_BUTTON