X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0ba6faaeeeec36fe4e6fc376f2f5edc1c0d34334..74a8f67d96591cec101def2a7d47c64072aff7fd:/src/common/sizer.cpp

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index 6d70ae0bc3..9bc6fcc416 100644
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -17,8 +17,8 @@
     #pragma hdrstop
 #endif
 
-#include "wx/display.h"
 #include "wx/sizer.h"
+#include "wx/private/flagscheck.h"
 
 #ifndef WX_PRECOMP
     #include "wx/string.h"
@@ -31,6 +31,8 @@
     #include "wx/toplevel.h"
 #endif // WX_PRECOMP
 
+#include "wx/display.h"
+#include "wx/vector.h"
 #include "wx/listimpl.cpp"
 
 
@@ -87,6 +89,31 @@ WX_DEFINE_EXPORTED_LIST( wxSizerItemList )
 // 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))))))))))))))))));
+
+#define ASSERT_VALID_SIZER_FLAGS(f)  wxASSERT_VALID_FLAGS(f, SIZER_FLAGS_MASK)
+
+
 void wxSizerItem::Init(const wxSizerFlags& flags)
 {
     Init();
@@ -94,6 +121,8 @@ void wxSizerItem::Init(const wxSizerFlags& flags)
     m_proportion = flags.GetProportion();
     m_flag = flags.GetFlags();
     m_border = flags.GetBorderInPixels();
+
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
 }
 
 wxSizerItem::wxSizerItem()
@@ -109,7 +138,7 @@ wxSizerItem::wxSizerItem()
 // window item
 void wxSizerItem::DoSetWindow(wxWindow *window)
 {
-    wxCHECK_RET( window, _T("NULL window in wxSizerItem::SetWindow()") );
+    wxCHECK_RET( window, wxT("NULL window in wxSizerItem::SetWindow()") );
 
     m_kind = Item_Window;
     m_window = window;
@@ -136,6 +165,8 @@ wxSizerItem::wxSizerItem(wxWindow *window,
              m_id(wxID_NONE),
              m_userData(userData)
 {
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+
     DoSetWindow(window);
 }
 
@@ -160,6 +191,8 @@ wxSizerItem::wxSizerItem(wxSizer *sizer,
              m_ratio(0.0),
              m_userData(userData)
 {
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+
     DoSetSizer(sizer);
 
     // m_minSize is set later
@@ -189,6 +222,8 @@ wxSizerItem::wxSizerItem(int width,
              m_id(wxID_NONE),
              m_userData(userData)
 {
+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+
     DoSetSpacer(wxSize(width, height));
 }
 
@@ -219,7 +254,7 @@ void wxSizerItem::Free()
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 
     m_kind = Item_None;
@@ -257,7 +292,7 @@ wxSize wxSizerItem::GetSize() const
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 
     if (m_flag & wxWEST)
@@ -316,7 +351,7 @@ bool wxSizerItem::InformFirstDirection(int direction, int size, int availableOth
         {
             if( !wxIsNullDouble(m_ratio) )
             {
-                wxCHECK_MSG( (m_proportion==0), false, _T("Shaped item, non-zero proportion in wxSizerItem::InformFirstDirection()") );
+                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
@@ -442,16 +477,27 @@ void wxSizerItem::SetDimension( const wxPoint& pos_, const wxSize& size_ )
     switch ( m_kind )
     {
         case Item_None:
-            wxFAIL_MSG( _T("can't set size of uninitialized sizer item") );
+            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 layed 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);
+                              wxSIZE_ALLOW_MINUS_ONE );
+#endif
             break;
-
+        }
         case Item_Sizer:
-            m_sizer->SetDimension(pos.x, pos.y, size.x, size.y);
+            m_sizer->SetDimension(pos, size);
             break;
 
         case Item_Spacer:
@@ -460,7 +506,7 @@ void wxSizerItem::SetDimension( const wxPoint& pos_, const wxSize& size_ )
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 }
 
@@ -489,7 +535,7 @@ void wxSizerItem::DeleteWindows()
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 
 }
@@ -499,7 +545,7 @@ void wxSizerItem::Show( bool show )
     switch ( m_kind )
     {
         case Item_None:
-            wxFAIL_MSG( _T("can't show uninitialized sizer item") );
+            wxFAIL_MSG( wxT("can't show uninitialized sizer item") );
             break;
 
         case Item_Window:
@@ -516,7 +562,7 @@ void wxSizerItem::Show( bool show )
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 }
 
@@ -536,32 +582,27 @@ bool wxSizerItem::IsShown() const
             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)
+            for ( wxSizerItemList::compatibility_iterator
+                    node = m_sizer->GetChildren().GetFirst();
+                  node;
+                  node = node->GetNext() )
             {
-                // Some apps (such as dialog editors) depend on an empty sizer still
-                // being laid out correctly and reporting the correct size and position.
-                if (m_sizer->GetChildren().GetCount() == 0)
+                if ( node->GetData()->IsShown() )
                     return true;
-
-                for ( wxSizerItemList::compatibility_iterator
-                        node = m_sizer->GetChildren().GetFirst();
-                      node;
-                      node = node->GetNext() )
-                {
-                    if ( node->GetData()->IsShown() )
-                        return true;
-                }
             }
             return false;
+        }
 
         case Item_Spacer:
             return m_spacer->IsShown();
 
         case Item_Max:
         default:
-            wxFAIL_MSG( _T("unexpected wxSizerItem::m_kind") );
+            wxFAIL_MSG( wxT("unexpected wxSizerItem::m_kind") );
     }
 
     return false;
@@ -589,7 +630,7 @@ wxSizer::~wxSizer()
     WX_CLEAR_LIST(wxSizerItemList, m_children);
 }
 
-wxSizerItem* wxSizer::Insert( size_t index, wxSizerItem *item )
+wxSizerItem* wxSizer::DoInsert( size_t index, wxSizerItem *item )
 {
     m_children.Insert( index, item );
 
@@ -634,7 +675,7 @@ bool wxSizer::Remove( wxWindow *window )
 
 bool wxSizer::Remove( wxSizer *sizer )
 {
-    wxASSERT_MSG( sizer, _T("Removing NULL sizer") );
+    wxASSERT_MSG( sizer, wxT("Removing NULL sizer") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -658,11 +699,11 @@ bool wxSizer::Remove( int index )
 {
     wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
                  false,
-                 _T("Remove index is out of range") );
+                 wxT("Remove index is out of range") );
 
     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 
-    wxCHECK_MSG( node, false, _T("Failed to find child node") );
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
 
     delete node->GetData();
     m_children.Erase( node );
@@ -672,7 +713,7 @@ bool wxSizer::Remove( int index )
 
 bool wxSizer::Detach( wxSizer *sizer )
 {
-    wxASSERT_MSG( sizer, _T("Detaching NULL sizer") );
+    wxASSERT_MSG( sizer, wxT("Detaching NULL sizer") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -694,7 +735,7 @@ bool wxSizer::Detach( wxSizer *sizer )
 
 bool wxSizer::Detach( wxWindow *window )
 {
-    wxASSERT_MSG( window, _T("Detaching NULL window") );
+    wxASSERT_MSG( window, wxT("Detaching NULL window") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -717,11 +758,11 @@ bool wxSizer::Detach( int index )
 {
     wxCHECK_MSG( index >= 0 && (size_t)index < m_children.GetCount(),
                  false,
-                 _T("Detach index is out of range") );
+                 wxT("Detach index is out of range") );
 
     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 
-    wxCHECK_MSG( node, false, _T("Failed to find child node") );
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
 
     wxSizerItem *item = node->GetData();
 
@@ -735,8 +776,8 @@ bool wxSizer::Detach( int index )
 
 bool wxSizer::Replace( wxWindow *oldwin, wxWindow *newwin, bool recursive )
 {
-    wxASSERT_MSG( oldwin, _T("Replacing NULL window") );
-    wxASSERT_MSG( newwin, _T("Replacing with NULL window") );
+    wxASSERT_MSG( oldwin, wxT("Replacing NULL window") );
+    wxASSERT_MSG( newwin, wxT("Replacing with NULL window") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -763,8 +804,8 @@ bool wxSizer::Replace( wxWindow *oldwin, wxWindow *newwin, bool recursive )
 
 bool wxSizer::Replace( wxSizer *oldsz, wxSizer *newsz, bool recursive )
 {
-    wxASSERT_MSG( oldsz, _T("Replacing NULL sizer") );
-    wxASSERT_MSG( newsz, _T("Replacing with NULL sizer") );
+    wxASSERT_MSG( oldsz, wxT("Replacing NULL sizer") );
+    wxASSERT_MSG( newsz, wxT("Replacing with NULL sizer") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -790,15 +831,19 @@ bool wxSizer::Replace( wxSizer *oldsz, wxSizer *newsz, bool recursive )
 
 bool wxSizer::Replace( size_t old, wxSizerItem *newitem )
 {
-    wxCHECK_MSG( old < m_children.GetCount(), false, _T("Replace index is out of range") );
-    wxASSERT_MSG( newitem, _T("Replacing with NULL item") );
+    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, _T("Failed to find child node") );
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
 
     wxSizerItem *item = node->GetData();
     node->SetData(newitem);
+
+    if (item->IsWindow() && item->GetWindow())
+        item->GetWindow()->SetContainingSizer(NULL);
+
     delete item;
 
     return true;
@@ -971,15 +1016,6 @@ wxSize wxSizer::VirtualFitSize( wxWindow *window )
     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;
-    Layout();
-}
-
 wxSize wxSizer::GetMinSize()
 {
     wxSize ret( CalcMin() );
@@ -996,7 +1032,7 @@ void wxSizer::DoSetMinSize( int width, int height )
 
 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 {
-    wxASSERT_MSG( window, _T("SetMinSize for NULL window") );
+    wxASSERT_MSG( window, wxT("SetMinSize for NULL window") );
 
     // Is it our immediate child?
 
@@ -1034,7 +1070,7 @@ bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 
 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 {
-    wxASSERT_MSG( sizer, _T("SetMinSize for NULL sizer") );
+    wxASSERT_MSG( sizer, wxT("SetMinSize for NULL sizer") );
 
     // Is it our immediate child?
 
@@ -1074,7 +1110,7 @@ bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )
 {
     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 
-    wxCHECK_MSG( node, false, _T("Failed to find child node") );
+    wxCHECK_MSG( node, false, wxT("Failed to find child node") );
 
     wxSizerItem     *item = node->GetData();
 
@@ -1094,7 +1130,7 @@ bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )
 
 wxSizerItem* wxSizer::GetItem( wxWindow *window, bool recursive )
 {
-    wxASSERT_MSG( window, _T("GetItem for NULL window") );
+    wxASSERT_MSG( window, wxT("GetItem for NULL window") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -1120,7 +1156,7 @@ wxSizerItem* wxSizer::GetItem( wxWindow *window, bool recursive )
 
 wxSizerItem* wxSizer::GetItem( wxSizer *sizer, bool recursive )
 {
-    wxASSERT_MSG( sizer, _T("GetItem for NULL sizer") );
+    wxASSERT_MSG( sizer, wxT("GetItem for NULL sizer") );
 
     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
     while (node)
@@ -1148,7 +1184,7 @@ wxSizerItem* wxSizer::GetItem( size_t index )
 {
     wxCHECK_MSG( index < m_children.GetCount(),
                  NULL,
-                 _T("GetItem index is out of range") );
+                 wxT("GetItem index is out of range") );
 
     return m_children.Item( index )->GetData();
 }
@@ -1243,7 +1279,7 @@ bool wxSizer::IsShown( wxWindow *window ) const
         node = node->GetNext();
     }
 
-    wxFAIL_MSG( _T("IsShown failed to find sizer item") );
+    wxFAIL_MSG( wxT("IsShown failed to find sizer item") );
 
     return false;
 }
@@ -1262,7 +1298,7 @@ bool wxSizer::IsShown( wxSizer *sizer ) const
         node = node->GetNext();
     }
 
-    wxFAIL_MSG( _T("IsShown failed to find sizer item") );
+    wxFAIL_MSG( wxT("IsShown failed to find sizer item") );
 
     return false;
 }
@@ -1271,7 +1307,7 @@ bool wxSizer::IsShown( size_t index ) const
 {
     wxCHECK_MSG( index < m_children.GetCount(),
                  false,
-                 _T("IsShown index is out of range") );
+                 wxT("IsShown index is out of range") );
 
     return m_children.Item( index )->GetData()->IsShown();
 }
@@ -1281,45 +1317,86 @@ bool wxSizer::IsShown( size_t index ) const
 // 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 )
-    : m_rows( ( cols == 0 && rows == 0 ) ? 1 : rows )
-    , m_cols( cols )
-    , m_vgap( vgap )
-    , m_hgap( hgap )
+    : m_rows( rows || cols ? rows : 1 ),
+      m_cols( cols ),
+      m_vgap( vgap ),
+      m_hgap( hgap )
 {
+    wxASSERT(rows >= 0 && cols >= 0);
 }
 
-wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
-    : m_rows( cols == 0 ? 1 : 0 )
-    , m_cols( cols )
-    , m_vgap( vgap )
-    , m_hgap( 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() )
 {
+    wxASSERT(rows >= 0 && cols >= 0);
 }
 
-int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
+wxSizerItem *wxGridSizer::DoInsert(size_t index, wxSizerItem *item)
 {
-    int nitems = m_children.GetCount();
-    if ( nitems)
+    // 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 )
     {
-        if ( m_cols )
-        {
-            ncols = m_cols;
-            nrows = (nitems + m_cols - 1) / m_cols;
-        }
-        else if ( m_rows )
+        const int nitems = m_children.GetCount();
+        if ( nitems == m_cols*m_rows )
         {
-            ncols = (nitems + m_rows - 1) / m_rows;
-            nrows = m_rows;
-        }
-        else // 0 columns, 0 rows?
-        {
-            wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
+            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)
+            );
 
-            nrows = ncols = 0;
+            // 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();
+
+    ncols = GetEffectiveColsCount();
+    nrows = GetEffectiveRowsCount();
+
+    // 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;
 }
 
@@ -1346,7 +1423,7 @@ void wxGridSizer::RecalcSizes()
             {
                 wxSizerItemList::compatibility_iterator node = m_children.Item( i );
 
-                wxASSERT_MSG( node, _T("Failed to find SizerItemList node") );
+                wxASSERT_MSG( node, wxT("Failed to find SizerItemList node") );
 
                 SetItemBounds( node->GetData(), x, y, w, h);
             }
@@ -1449,6 +1526,20 @@ void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 // 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 )
                : wxGridSizer( rows, cols, vgap, hgap ),
                  m_flexDirection(wxBOTH),
@@ -1456,8 +1547,8 @@ wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 {
 }
 
-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)
 {
@@ -1606,11 +1697,9 @@ wxSize wxFlexGridSizer::CalcMin()
     m_rowHeights.assign(nrows, -1);
     m_colWidths.assign(ncols, -1);
 
-    // 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 )
+          ++i)
     {
         wxSizerItem * const item = *i;
         if ( item->IsShown() )
@@ -1739,6 +1828,38 @@ DoAdjustForGrowables(int delta,
 
 void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
 {
+#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();
+
+            for ( size_t n = 0; n < m_growableRows.size(); n++ )
+            {
+                wxASSERT_MSG( m_growableRows[n] < nrows,
+                              "invalid growable row index" );
+            }
+        }
+
+        if ( !m_cols )
+        {
+            int ncols = CalcCols();
+
+            for ( size_t n = 0; n < m_growableCols.size(); n++ )
+            {
+                wxASSERT_MSG( m_growableCols[n] < ncols,
+                              "invalid growable column index" );
+            }
+        }
+    }
+#endif // wxDEBUG_LEVEL
+
+
     if ( (m_flexDirection & wxHORIZONTAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
     {
         DoAdjustForGrowables
@@ -1753,32 +1874,32 @@ void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
         // This gives nested objects that benefit from knowing one size
         // component in advance the chance to use that.
         bool didAdjustMinSize = false;
-        int nrows, ncols;
-        CalcRowsCols(nrows, ncols);
 
         // Iterate over all items and inform about column width
-        size_t n = 0;
+        const int ncols = GetEffectiveColsCount();
+        int col = 0;
         for ( wxSizerItemList::iterator i = m_children.begin();
               i != m_children.end();
-              ++i, ++n )
+              ++i )
         {
-            const int col = n % ncols;
             didAdjustMinSize |= (*i)->InformFirstDirection(wxHORIZONTAL, m_colWidths[col], sz.y - m_calculatedMinSize.y);
-    }
+            if ( ++col == ncols )
+                col = 0;
+        }
 
         // 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
-        );
+        {
+            DoAdjustForGrowables
+            (
+                sz.x - m_calculatedMinSize.x,
+                m_growableCols,
+                m_colWidths,
+                m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableColsProportions
+                                                        : NULL
+            );
+        }
     }
-}
 
     if ( (m_flexDirection & wxVERTICAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
     {
@@ -1795,15 +1916,40 @@ void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
     }
 }
 
+bool wxFlexGridSizer::IsRowGrowable( size_t idx )
+{
+    return m_growableRows.Index( idx ) != wxNOT_FOUND;
+}
+
+bool wxFlexGridSizer::IsColGrowable( size_t idx )
+{
+    return m_growableCols.Index( idx ) != wxNOT_FOUND;
+}
 
 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_growableRowsProportions.Add( proportion );
 }
 
 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 );
 }
@@ -1823,7 +1969,7 @@ DoRemoveFromArrays(size_t idx, wxArrayInt& items, wxArrayInt& proportions)
         }
     }
 
-    wxFAIL_MSG( _T("column/row is already not growable") );
+    wxFAIL_MSG( wxT("column/row is already not growable") );
 }
 
 void wxFlexGridSizer::RemoveGrowableCol( size_t idx )
@@ -1840,25 +1986,78 @@ void wxFlexGridSizer::RemoveGrowableRow( size_t idx )
 // wxBoxSizer
 //---------------------------------------------------------------------------
 
+wxSizerItem *wxBoxSizer::AddSpacer(int size)
+{
+    return IsVertical() ? Add(0, size) : Add(size, 0);
+}
+
+namespace
+{
+
+/*
+    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 )
+    {
+        const wxSize sizeMin = item->GetMinSizeWithBorder();
+        size = orient == wxHORIZONTAL ? sizeMin.x : sizeMin.y;
+
+        if ( size >= remainingSpace )
+        {
+            // 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;
+        }
+
+        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 = GetSizeInMajorDir(m_size) - GetSizeInMajorDir(m_minSize);
+    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
 
-    // Inform child items about the size in minor direction, that can
-    // change how much free space we have in major dir and how to distribute it.
-    int majorMinSum = 0;
-    wxSizerItemList::const_iterator i ;
-    for ( i = m_children.begin();
-          i != m_children.end();
-          ++i )
+
+    // 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;
 
@@ -1875,51 +2074,197 @@ void wxBoxSizer::RecalcSizes()
             // take too much, so delta should not become negative.
             delta -= deltaChange;
         }
-        majorMinSum += GetSizeInMajorDir(item->GetMinSizeWithBorder());
+        minMajorSize += GetSizeInMajorDir(item->GetMinSizeWithBorder());
     }
-    // And update our min size
-    SizeInMajorDir(m_minSize) = majorMinSum;
 
+    // update our min size and delta which may have changed
+    SizeInMajorDir(m_minSize) = minMajorSize;
+    delta = totalMajorSize - minMajorSize;
 
-    // might have a new delta now
-    delta = GetSizeInMajorDir(m_size) - GetSizeInMajorDir(m_minSize);
-
-    // the position at which we put the next child
-    wxPoint pt(m_position);
 
+    // space and sum of proportions for the remaining items, both may change
+    // below
+    wxCoord remaining = totalMajorSize;
     int totalProportion = m_totalProportion;
-    for ( i = m_children.begin();
-          i != m_children.end();
-          ++i )
+
+    // 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 * const item = *i;
+        // 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;
 
-        if ( !item->IsShown() )
-            continue;
+            if ( !item->IsShown() )
+                continue;
 
-        const wxSize sizeThis(item->GetMinSizeWithBorder());
+            // deal with fixed size items only during this pass
+            if ( item->GetProportion() )
+                continue;
 
-        // adjust the size in the major direction using the proportion
-        wxCoord majorSize = GetSizeInMajorDir(sizeThis);
-        const int propItem = item->GetProportion();
-        if ( propItem )
+            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 )
         {
-            const int deltaItem = (delta * propItem) / totalProportion;
+            wxSizerItem * const item = *i;
 
-            majorSize += deltaItem;
+            if ( !item->IsShown() )
+                continue;
 
-            delta -= deltaItem;
-            totalProportion -= propItem;
+            // 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 )
+            {
+                i = m_children.begin();
+                n = 0;
+                nonFixedSpaceChanged = false;
+            }
+
+            // 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;
+            }
+
+            // we can already allocate space for this item
+            majorSizes[n] = minMajor;
+
+            // 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;
+
+            nonFixedSpaceChanged = true;
+        }
+
+
+        // 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;
+            }
+        }
+    }
+
+
+    // the position at which we put the next child
+    wxPoint pt(m_position);
+
+
+    // 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 * const item = *i;
+
+        if ( !item->IsShown() )
+            continue;
+
+        const int majorSize = majorSizes[n];
+
+        const wxSize sizeThis(item->GetMinSizeWithBorder());
 
         // apply the alignment in the minor direction
         wxPoint posChild(pt);
 
         wxCoord minorSize = GetSizeInMinorDir(sizeThis);
         const int flag = item->GetFlag();
-        if ( flag & (wxEXPAND | wxSHAPED) )
+        if ( (flag & (wxEXPAND | wxSHAPED)) || (minorSize > totalMinorSize) )
         {
+            // 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;
         }
         else if ( flag & (IsVertical() ? wxALIGN_RIGHT : wxALIGN_BOTTOM) )
@@ -1928,7 +2273,8 @@ void wxBoxSizer::RecalcSizes()
         }
         // NB: wxCENTRE is used here only for backwards compatibility,
         //     wxALIGN_CENTRE should be used in new code
-        else if ( flag & (wxCENTER | wxALIGN_CENTRE) )
+        else if ( flag & (wxCENTER | (IsVertical() ? wxALIGN_CENTRE_HORIZONTAL
+                                                   : wxALIGN_CENTRE_VERTICAL)) )
         {
             PosInMinorDir(posChild) += (totalMinorSize - minorSize) / 2;
         }
@@ -1957,7 +2303,12 @@ wxSize wxBoxSizer::CalcMin()
     m_totalProportion = 0;
     m_minSize = wxSize(0, 0);
 
-    // calculate the minimal sizes for all items and count sum of proportions
+    // 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 )
@@ -1968,231 +2319,31 @@ wxSize wxBoxSizer::CalcMin()
             continue;
 
         const wxSize sizeMinThis = item->CalcMin();
-        SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
-        if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
-            SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);
-
-        m_totalProportion += item->GetProportion();
-    }
-
-    return m_minSize;
-}
-
-//---------------------------------------------------------------------------
-// wxWrapSizer
-//---------------------------------------------------------------------------
-
-#define wxDEFAULT_PROPORTION_LAST    1000000
-
-// User data to hold old proportion for last item on line
-// (which might be extended)
-struct wxPropHolder : public wxObject
-{
-    wxPropHolder( ) : m_item(0), m_propOld(0)   { }
-    void Init( wxSizerItem *item, int propOld ) { m_item=item; m_propOld=propOld; }
-
-    wxSizerItem *m_item;
-    int          m_propOld;
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxWrapSizer, wxBoxSizer);
-
-wxWrapSizer::wxWrapSizer( int orient, int flags )
-    : wxBoxSizer(orient),
-      m_prim_size_last( -1 ),
-      m_rows(orient^wxBOTH),
-      m_flags(flags)
-{
-}
-
-wxWrapSizer::~wxWrapSizer()
-{
-    // Have to clear grand child items so that they're not deleted twice
-    for( int ix=m_rows.GetChildren().GetCount()-1; ix>=0; ix-- )
-    {
-        wxSizer *psz = m_rows.GetItem((size_t)ix)->GetSizer();
-        wxSizerItemList &sl = psz->GetChildren();
-        while( sl.GetLast() )
-            sl.Erase( sl.GetLast() );
-    }
-}
-
-
-bool wxWrapSizer::InformFirstDirection( int direction, int size, int WXUNUSED(availableOtherDir) )
-{
-    if( !direction )
-    {
-        // Better to keep value, then CalcMin will work better
-        //m_prim_size_last = -1;
-        return false;
-    }
-    if( direction==m_orient )
-    {
-        // The direction is same as our primary, so we can make use of it
-        m_prim_size_last = size;
-        return true;
-    }
-    else
-        return false;
-}
-
-
-void wxWrapSizer::AdjustPropLastItem(wxSizer *psz, wxSizerItem *itemLast)
-{
-    wxSizerItem *psi = m_rows.GetItem(psz);
-    wxASSERT(psi);
-    wxPropHolder *pph = (wxPropHolder*)psi->GetUserData();
-    if ( !pph )
-        psi->SetUserData( pph=new wxPropHolder );
-
-    pph->Init( itemLast, itemLast->GetProportion() );
-    itemLast->SetProportion( wxDEFAULT_PROPORTION_LAST );
-}
-
-void wxWrapSizer::RecalcSizes()
-{
-    wxASSERT( m_orient&wxBOTH );
-    if (m_children.GetCount() == 0)
-        return;
-
-    // What we do here is to put our items into child box sizers,
-    // as many of them as we have lines.
-
-    // Empty all items in all rows in owned sizer.
-    // We have to access the list directly, since we don't want to
-    // destroy the wxSizerItems.
-    for( int ix=m_rows.GetChildren().GetCount()-1; ix>=0; ix-- ){
-        wxSizerItem *psi = m_rows.GetItem( (size_t)ix );
-
-        // Restore proportion for last item on line (if item has not been deleted)
-        wxPropHolder *pph = (wxPropHolder*)psi->GetUserData();
-        if( pph && GetChildren().Find(pph->m_item) )
-            pph->m_item->SetProportion(pph->m_propOld);
-
-        wxSizer *psz = psi->GetSizer();
-        wxASSERT( psz );
-        wxSizerItemList &sl = psz->GetChildren();
-        while( sl.GetLast() )
-            sl.Erase( sl.GetLast() );
-    }
-
-    int lineSumMajor = 0;
-    int majorSize = GetSizeInMajorDir(m_size);
-
-    // Make sure we have at least one child sizer
-    m_n_line = 1;
-    if( !m_rows.GetChildren().GetCount() )
-        m_rows.Add( new wxBoxSizer(GetOrientation()), 1, wxEXPAND );
-
-    // The sizer where to insert items in
-    wxSizer *psz = m_rows.GetItem((size_t)0)->GetSizer();
-    wxASSERT( psz );
-
-    // Now put our child items into child sizers instead
-    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
-    wxSizerItem *item = NULL, *itemLast=NULL;
-    while (node)
-    {
-        item = node->GetData();
-        if ( item->IsShown() )
+        if ( const int propThis = item->GetProportion() )
         {
-            wxSize minSz = item->GetMinSize();
-            int minSzMajor = GetSizeInMajorDir(minSz);
+            float minSizeToProp = GetSizeInMajorDir(sizeMinThis);
+            minSizeToProp /= propThis;
 
-            // More space on this line?
-            if( !lineSumMajor || lineSumMajor+minSzMajor<=majorSize )
-            {
-                lineSumMajor += minSzMajor;
-            }
-            else
-            {
-                lineSumMajor = minSzMajor;
-                // Get a new empty sizer to insert into
-                if( (int)m_rows.GetChildren().GetCount()<=m_n_line )
-                    m_rows.Add( new wxBoxSizer(GetOrientation()), 1, wxEXPAND );
-
-                // If we have extend-last-on-each-line mode, then do so now
-                // Note: We must store old proportion value then.
-                if( m_flags&wxEXTEND_LAST_ON_EACH_LINE )
-                    AdjustPropLastItem(psz,itemLast);
-
-                // The sizer where to insert items in
-                psz = m_rows.GetItem(m_n_line++)->GetSizer();
-            }
-            itemLast = item;
-            psz->Add( item );
-            // If item is a window, it now has a pointer to the child sizer,
-            // which is wrong. Set it to point to us.
-            if( item->GetWindow() )
-                item->GetWindow()->SetContainingSizer( this );
-        }
-        node = node->GetNext();
-    }
-
-    // If we have extend-last-on-each-line mode, then do so now
-    if( m_flags&wxEXTEND_LAST_ON_EACH_LINE )
-        AdjustPropLastItem(psz,itemLast);
-
-    // If we have more sizers than lines, remove them
-    while( (int)m_rows.GetChildren().GetCount()>m_n_line )
-        m_rows.Remove( m_n_line );
-
-    // Now do layout on row sizer
-    m_rows.SetDimension( m_position.x, m_position.y, m_size.x, m_size.y );
-
-    // Remember this to next time (will be overridden by InformFirstDirection if used)
-    m_prim_size_last = GetSizeInMajorDir(m_size);
-}
-
-
-wxSize wxWrapSizer::CalcMin()
-{
-    if (m_children.GetCount() == 0)
-        return wxSize();
+            if ( minSizeToProp > maxMinSizeToProp )
+                maxMinSizeToProp = minSizeToProp;
 
-    // Algorithm for calculating min size: (assuming horizontal orientation)
-    // X: Max width of all members
-    // Y: Based on last X, calculate how many lines needed
-    //    First time around, assume all items fits on one line
-
-    int maxMajor = 0;
-    int minorSum = 0;
-    int lineMaxMinor = 0;
-    int lineSumMajor = 0;
-    m_n_line = 0;
-
-    // precalc item minsizes and fit on lines (preliminary)
-    wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
-    while (node)
-    {
-        wxSizerItem *item = node->GetData();
-        if ( item->IsShown() )
+            m_totalProportion += item->GetProportion();
+        }
+        else // fixed size item
         {
-            wxSize minSz = item->CalcMin();
-            int szMajor = GetSizeInMajorDir(minSz);
-            int szMinor = GetSizeInMinorDir(minSz);
-            if( szMajor>maxMajor ) maxMajor = szMajor;
-            // More space on this line?
-            if( m_prim_size_last<0 || !lineSumMajor ||
-                lineSumMajor+szMajor<=m_prim_size_last )
-            {
-                lineSumMajor += szMajor;
-                if( szMinor>lineMaxMinor )
-                    lineMaxMinor = szMinor;
-            }
-            else
-            {
-                minorSum += lineMaxMinor;    // Add height of highest item on last line
-                m_n_line++;
-                lineMaxMinor = szMinor;
-                lineSumMajor = szMajor;
-            }
+            // Just account for its size directly
+            SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
         }
-        node = node->GetNext();
+
+        // In the transversal direction we just need to find the maximum.
+        if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
+            SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);
     }
-    minorSum += lineMaxMinor;            // Add height of highest item on last line
 
-    m_minSize = SizeFromMajorMinor(maxMajor, minorSum);
+    // 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;
 }
 
@@ -2226,29 +2377,47 @@ wxStaticBoxSizer::~wxStaticBoxSizer()
     delete m_staticBox;
 }
 
-static void GetStaticBoxBorders( wxStaticBox *box,
-                                 int *borderTop,
-                                 int *borderOther)
-{
-    // this has to be done platform by platform as there is no way to
-    // guess the thickness of a wxStaticBox border
-    box->GetBordersForSizer(borderTop, borderOther);
-}
-
 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 );
 
-    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;
 
+    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
+        m_position.x = m_position.y = 10;
+#else
+        // if the wxStaticBox has childrens, 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;
@@ -2258,10 +2427,17 @@ void wxStaticBoxSizer::RecalcSizes()
 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;
+
+    // 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;
@@ -2289,6 +2465,10 @@ bool wxStaticBoxSizer::Detach( wxWindow *window )
 
 #endif // wxUSE_STATBOX
 
+//---------------------------------------------------------------------------
+// wxStdDialogButtonSizer
+//---------------------------------------------------------------------------
+
 #if wxUSE_BUTTON
 
 wxStdDialogButtonSizer::wxStdDialogButtonSizer()
@@ -2396,32 +2576,40 @@ void wxStdDialogButtonSizer::Realize()
         }
 
         // Extra space around and at the right
-        Add(12, 24);
+        Add(12, 40);
 #elif defined(__WXGTK20__)
-        Add(0, 0, 0, wxLEFT, 9);
+        // 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((wxWindow*)m_buttonHelp, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
+            Add(m_buttonHelp, flagsBtn);
 
-        // extra whitespace between help and cancel/ok buttons
-        Add(0, 0, 1, wxEXPAND, 0);
+        // Align the rest of the buttons to the right.
+        AddStretchSpacer();
 
-        if (m_buttonNegative){
-            Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
-        }
+        if (m_buttonNegative)
+            Add(m_buttonNegative, flagsBtn);
 
-        // according to HIG, in explicit apply windows the order is:
-        // [ Help                     Apply   Cancel   OK ]
         if (m_buttonApply)
-            Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
+            Add(m_buttonApply, flagsBtn);
 
-        if (m_buttonCancel){
-            Add((wxWindow*)m_buttonCancel, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
-            // Cancel or help should be default
-            // m_buttonCancel->SetDefaultButton();
-        }
+        if (m_buttonCancel)
+            Add(m_buttonCancel, flagsBtn);
 
         if (m_buttonAffirmative)
-            Add((wxWindow*)m_buttonAffirmative, 0, wxALIGN_CENTRE | wxLEFT, 6);
+            Add(m_buttonAffirmative, flagsBtn);
+
+        // Ensure that the right margin is 12 as well.
+        AddSpacer(9);
 #elif defined(__WXMSW__)
         // Windows