update the size of the wxGridSizer as items are added to wxGBSizer to avoid asserts...

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

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index c8965d7295d0ff10480e912aa3f2450c6c940206..65d2f3d9cbb12d3bb355aea5b63c706f46e3fe86 100644 (file)
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -17,8 +17,8 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#include "wx/display.h"

 #include "wx/sizer.h"
 #include "wx/sizer.h"

+#include "wx/private/flagscheck.h"

 
 #ifndef WX_PRECOMP
     #include "wx/string.h"
 
 #ifndef WX_PRECOMP
     #include "wx/string.h"


@@ -31,6 +31,7 @@
     #include "wx/toplevel.h"
 #endif // WX_PRECOMP
 
     #include "wx/toplevel.h"
 #endif // WX_PRECOMP
 

+#include "wx/display.h"

 #include "wx/listimpl.cpp"
 
 
 #include "wx/listimpl.cpp"
 
 


@@ -87,6 +88,31 @@ WX_DEFINE_EXPORTED_LIST( wxSizerItemList )
 // 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))))))))))))))))));
+
+#define ASSERT_VALID_SIZER_FLAGS(f)  wxASSERT_VALID_FLAGS(f, SIZER_FLAGS_MASK)
+
+

 void wxSizerItem::Init(const wxSizerFlags& flags)
 {
     Init();
 void wxSizerItem::Init(const wxSizerFlags& flags)
 {
     Init();


@@ -94,6 +120,8 @@ void wxSizerItem::Init(const wxSizerFlags& flags)
     m_proportion = flags.GetProportion();
     m_flag = flags.GetFlags();
     m_border = flags.GetBorderInPixels();
     m_proportion = flags.GetProportion();
     m_flag = flags.GetFlags();
     m_border = flags.GetBorderInPixels();

+
+    ASSERT_VALID_SIZER_FLAGS( m_flag );

 }
 
 wxSizerItem::wxSizerItem()
 }
 
 wxSizerItem::wxSizerItem()


@@ -103,6 +131,7 @@ wxSizerItem::wxSizerItem()
     m_proportion = 0;
     m_border = 0;
     m_flag = 0;
     m_proportion = 0;
     m_border = 0;
     m_flag = 0;

+    m_id = wxID_NONE;

 }
 
 // window item
 }
 
 // window item


@@ -132,8 +161,11 @@ wxSizerItem::wxSizerItem(wxWindow *window,
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),

+             m_id(wxID_NONE),

              m_userData(userData)
 {
              m_userData(userData)
 {

+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+

     DoSetWindow(window);
 }
 
     DoSetWindow(window);
 }
 


@@ -154,9 +186,12 @@ wxSizerItem::wxSizerItem(wxSizer *sizer,
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),

+             m_id(wxID_NONE),

              m_ratio(0.0),
              m_userData(userData)
 {
              m_ratio(0.0),
              m_userData(userData)
 {

+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+

     DoSetSizer(sizer);
 
     // m_minSize is set later
     DoSetSizer(sizer);
 
     // m_minSize is set later


@@ -183,8 +218,11 @@ wxSizerItem::wxSizerItem(int width,
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),
              m_proportion(proportion),
              m_border(border),
              m_flag(flag),

+             m_id(wxID_NONE),

              m_userData(userData)
 {
              m_userData(userData)
 {

+    ASSERT_VALID_SIZER_FLAGS( m_flag );
+

     DoSetSpacer(wxSize(width, height));
 }
 
     DoSetSpacer(wxSize(width, height));
 }
 


@@ -268,6 +306,73 @@ wxSize wxSizerItem::GetSize() const
     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, _T("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()
 {
     if (IsSizer())
 wxSize wxSizerItem::CalcMin()
 {
     if (IsSizer())


@@ -380,7 +485,7 @@ void wxSizerItem::SetDimension( const wxPoint& pos_, const wxSize& size_ )
             break;
 
         case Item_Sizer:
             break;
 
         case Item_Sizer:

-            m_sizer->SetDimension(pos.x, pos.y, size.x, size.y);
+            m_sizer->SetDimension(pos, size);

             break;
 
         case Item_Spacer:
             break;
 
         case Item_Spacer:


@@ -451,6 +556,9 @@ void wxSizerItem::Show( bool show )
 
 bool wxSizerItem::IsShown() const
 {
 
 bool wxSizerItem::IsShown() const
 {

+    if ( m_flag & wxRESERVE_SPACE_EVEN_IF_HIDDEN )
+        return true;
+

     switch ( m_kind )
     {
         case Item_None:
     switch ( m_kind )
     {
         case Item_None:


@@ -522,6 +630,9 @@ wxSizerItem* wxSizer::Insert( size_t index, wxSizerItem *item )
     if ( item->GetWindow() )
         item->GetWindow()->SetContainingSizer( this );
 
     if ( item->GetWindow() )
         item->GetWindow()->SetContainingSizer( this );
 

+    if ( item->GetSizer() )
+        item->GetSizer()->SetContainingWindow( m_containingWindow );
+

     return item;
 }
 
     return item;
 }
 


@@ -760,11 +871,13 @@ void wxSizer::DeleteWindows()
     }
 }
 
     }
 }
 

-wxSize wxSizer::Fit( wxWindow *window )
+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
     // take the min size by default and limit it by max size

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

 
     wxTopLevelWindow *tlw = wxDynamicCast(window, wxTopLevelWindow);
     if ( tlw )
 
     wxTopLevelWindow *tlw = wxDynamicCast(window, wxTopLevelWindow);
     if ( tlw )


@@ -772,31 +885,51 @@ wxSize wxSizer::Fit( wxWindow *window )
         // hack for small screen devices where TLWs are always full screen
         if ( tlw->IsAlwaysMaximized() )
         {
         // hack for small screen devices where TLWs are always full screen
         if ( tlw->IsAlwaysMaximized() )
         {

-            size = tlw->GetSize();
+            return tlw->GetClientSize();

         }
         }

-        else // normal situation
-        {
-            // 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();
+        // 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();
+
+        // space for decorations and toolbars etc.
+        sizeMax = tlw->WindowToClientSize(sizeMax);
+    }
+    else
+    {
+        sizeMax = GetMaxClientSize(window);

     }
 
     if ( sizeMax.x != wxDefaultCoord && size.x > sizeMax.x )
     }
 
     if ( sizeMax.x != wxDefaultCoord && size.x > sizeMax.x )

-        size.x = sizeMax.x;
+            size.x = sizeMax.x;

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

-        size.y = sizeMax.y;
+            size.y = sizeMax.y;

 
 

+    return size;
+}

 
 

-    window->SetSize( size );
+wxSize wxSizer::ComputeFittingWindowSize(wxWindow *window)
+{
+    wxCHECK_MSG( window, wxDefaultSize, "window can't be NULL" );

 
 

-    return size;
+    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::FitInside( wxWindow *window )
 }
 
 void wxSizer::FitInside( wxWindow *window )


@@ -825,59 +958,31 @@ void wxSizer::SetSizeHints( wxWindow *window )
     // Preserve the window's max size hints, but set the
     // lower bound according to the sizer calculations.
 
     // Preserve the window's max size hints, but set the
     // lower bound according to the sizer calculations.
 

-    wxSize size = Fit( window );
+    // 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.

 
 

-    window->SetSizeHints( size.x,
-                          size.y,
-                          window->GetMaxWidth(),
-                          window->GetMaxHeight() );
+    const wxSize clientSize = ComputeFittingClientSize(window);
+
+    window->SetMinClientSize(clientSize);
+    window->SetClientSize(clientSize);

 }
 
 }
 

+#if WXWIN_COMPATIBILITY_2_8

 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 {
 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 {

-    // Preserve the window's max size hints, but set the
-    // lower bound according to the sizer calculations.
-

     FitInside( window );
     FitInside( window );

-    wxSize size( window->GetVirtualSize() );
-    window->SetVirtualSizeHints( size.x,
-                                 size.y,
-                                 window->GetMaxWidth(),
-                                 window->GetMaxHeight() );
-}
-
-wxSize wxSizer::GetMaxWindowSize( wxWindow *window ) const
-{
-    return window->GetMaxSize();
-}
-
-wxSize wxSizer::GetMinWindowSize( wxWindow *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 );

 }
 }

+#endif // WXWIN_COMPATIBILITY_2_8

 
 // 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
 {
 
 // 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
 {

-    wxSize maxSize( window->GetMaxSize() );
-
-    if ( maxSize != wxDefaultSize )
-    {
-        wxSize size( window->GetSize() );
-        wxSize client_size( window->GetClientSize() );
-
-        return wxSize( maxSize.x + client_size.x - size.x,
-                       maxSize.y + client_size.y - size.y );
-    }
-    else
-        return wxDefaultSize;
+    return window->WindowToClientSize(window->GetMaxSize());

 }
 
 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 }
 
 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )


@@ -900,15 +1005,6 @@ wxSize wxSizer::VirtualFitSize( wxWindow *window )
     return size;
 }
 
     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() );
 wxSize wxSizer::GetMinSize()
 {
     wxSize ret( CalcMin() );


@@ -1082,6 +1178,33 @@ wxSizerItem* wxSizer::GetItem( size_t index )
     return m_children.Item( index )->GetData();
 }
 
     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 NULL;
+}
+

 bool wxSizer::Show( wxWindow *window, bool show, bool recursive )
 {
     wxSizerItem *item = GetItem( window, recursive );
 bool wxSizer::Show( wxWindow *window, bool show, bool recursive )
 {
     wxSizerItem *item = GetItem( window, recursive );


@@ -1201,10 +1324,17 @@ wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 
 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 {
 
 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 {

-    int nitems = m_children.GetCount();
-    if ( nitems)
+    const int nitems = m_children.GetCount();
+    if ( nitems )

     {
     {

-        if ( m_cols )
+        if ( m_cols && m_rows )
+        {
+            // if both rows and columns are specified by user, use the provided
+            // values even if we don't have enough items
+            ncols = m_cols;
+            nrows = m_rows;
+        }
+        else if ( m_cols )

         {
             ncols = m_cols;
             nrows = (nitems + m_cols - 1) / m_cols;
         {
             ncols = m_cols;
             nrows = (nitems + m_cols - 1) / m_cols;


@@ -1218,7 +1348,8 @@ int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
         {
             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 
         {
             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 

-            nrows = ncols = 0;
+            nrows =
+            ncols = 0;

         }
     }
 
         }
     }
 


@@ -1280,6 +1411,35 @@ wxSize wxGridSizer::CalcMin()
         node = node->GetNext();
     }
 
         node = node->GetNext();
     }
 

+    // 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 );
 }
     return wxSize( ncols * w + (ncols-1) * m_hgap,
                    nrows * h + (nrows-1) * m_vgap );
 }


@@ -1342,8 +1502,8 @@ wxFlexGridSizer::~wxFlexGridSizer()
 
 void wxFlexGridSizer::RecalcSizes()
 {
 
 void wxFlexGridSizer::RecalcSizes()
 {

-    int nitems, nrows, ncols;
-    if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
+    int nrows, ncols;
+    if ( !CalcRowsCols(nrows, ncols) )

         return;
 
     const wxPoint pt(GetPosition());
         return;
 
     const wxPoint pt(GetPosition());


@@ -1422,16 +1582,8 @@ static int SumArraySizes(const wxArrayInt& sizes, int gap)
     return total;
 }
 
     return total;
 }
 

-wxSize wxFlexGridSizer::CalcMin()
+void wxFlexGridSizer::FindWidthsAndHeights(int nrows, int ncols)

 {
 {

-    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
     // 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


@@ -1449,7 +1601,9 @@ wxSize wxFlexGridSizer::CalcMin()
         wxSizerItem * const item = *i;
         if ( item->IsShown() )
         {
         wxSizerItem * const item = *i;
         if ( item->IsShown() )
         {

-            const wxSize sz(item->CalcMin());
+            // 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;
 
             const int row = n / ncols;
             const int col = n % ncols;


@@ -1465,6 +1619,40 @@ wxSize wxFlexGridSizer::CalcMin()
 
     m_calculatedMinSize = wxSize(SumArraySizes(m_colWidths, m_hgap),
                                  SumArraySizes(m_rowHeights, m_vgap));
 
     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)
+    {
+        wxSizerItem * const item = *i;
+        if ( item->IsShown() )
+        {
+            item->CalcMin();
+        }
+    }
+
+    // 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);

 
     return m_calculatedMinSize;
 }
 
     return m_calculatedMinSize;
 }


@@ -1582,6 +1770,47 @@ DoAdjustForGrowables(int delta,
 
 void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
 {
 
 void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
 {

+    if ( (m_flexDirection & wxHORIZONTAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
+    {
+        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;
+        int nrows, ncols;
+        CalcRowsCols(nrows, ncols);
+
+        // Iterate over all items and inform about column width
+        size_t n = 0;
+        for ( wxSizerItemList::iterator i = m_children.begin();
+              i != m_children.end();
+              ++i, ++n )
+        {
+            const int col = n % ncols;
+            didAdjustMinSize |= (*i)->InformFirstDirection(wxHORIZONTAL, m_colWidths[col], sz.y - m_calculatedMinSize.y);
+        }
+
+        // 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
+            );
+        }
+    }
+

     if ( (m_flexDirection & wxVERTICAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
     {
         // pass NULL instead of proportions if the grow mode is ALL as we
     if ( (m_flexDirection & wxVERTICAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
     {
         // pass NULL instead of proportions if the grow mode is ALL as we


@@ -1595,29 +1824,38 @@ void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
                                                     : NULL
         );
     }
                                                     : NULL
         );
     }

+}

 
 

-    if ( (m_flexDirection & wxHORIZONTAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
-    {
-        DoAdjustForGrowables
-        (
-            sz.x - m_calculatedMinSize.x,
-            m_growableCols,
-            m_colWidths,
-            m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableColsProportions
-                                                    : NULL
-        );
-    }
+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 )
 {
 
 void wxFlexGridSizer::AddGrowableRow( size_t idx, int proportion )
 {

+    int nrows, ncols;
+    CalcRowsCols(nrows, ncols);
+    wxCHECK_RET( idx < (size_t)nrows, "invalid row index" );
+
+    wxASSERT_MSG( !IsRowGrowable( idx ),
+                  "AddGrowableRow() called for growable row" );

     m_growableRows.Add( idx );
     m_growableRowsProportions.Add( proportion );
 }
 
 void wxFlexGridSizer::AddGrowableCol( size_t idx, int proportion )
 {
     m_growableRows.Add( idx );
     m_growableRowsProportions.Add( proportion );
 }
 
 void wxFlexGridSizer::AddGrowableCol( size_t idx, int proportion )
 {

+    int nrows, ncols;
+    CalcRowsCols(nrows, ncols);
+    wxCHECK_RET( idx < (size_t)ncols, "invalid column index" );
+
+    wxASSERT_MSG( !IsColGrowable( idx ),
+                  "AddGrowableCol() called for growable column" );

     m_growableCols.Add( idx );
     m_growableColsProportions.Add( proportion );
 }
     m_growableCols.Add( idx );
     m_growableColsProportions.Add( proportion );
 }


@@ -1659,17 +1897,50 @@ void wxBoxSizer::RecalcSizes()
     if ( m_children.empty() )
         return;
 
     if ( m_children.empty() )
         return;
 

+    const wxCoord totalMinorSize = GetSizeInMinorDir(m_size);
+

     // the amount of free space which we should redistribute among the
     // stretchable items (i.e. those with non zero proportion)
     // the amount of free space which we should redistribute among the
     // stretchable items (i.e. those with non zero proportion)

-    int delta = SizeInMajorDir(m_size) - SizeInMajorDir(m_minSize);
+    int delta = GetSizeInMajorDir(m_size) - GetSizeInMajorDir(m_minSize);
+
+
+    // 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 )
+    {
+        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 )
+        {
+            // Since we passed available space along to the item, it should not
+            // take too much, so delta should not become negative.
+            delta -= deltaChange;
+        }
+        majorMinSum += GetSizeInMajorDir(item->GetMinSizeWithBorder());
+    }
+    // And update our min size
+    SizeInMajorDir(m_minSize) = majorMinSum;
+
+
+    // 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);
 
 
     // the position at which we put the next child
     wxPoint pt(m_position);
 

-    const wxCoord totalMinorSize = SizeInMinorDir(m_size);
-

     int totalProportion = m_totalProportion;
     int totalProportion = m_totalProportion;

-    for ( wxSizerItemList::const_iterator i = m_children.begin();
+    for ( i = m_children.begin();

           i != m_children.end();
           ++i )
     {
           i != m_children.end();
           ++i )
     {


@@ -1680,25 +1951,31 @@ void wxBoxSizer::RecalcSizes()
 
         const wxSize sizeThis(item->GetMinSizeWithBorder());
 
 
         const wxSize sizeThis(item->GetMinSizeWithBorder());
 

-

         // adjust the size in the major direction using the proportion
         // adjust the size in the major direction using the proportion

-        wxCoord majorSize = SizeInMajorDir(sizeThis);
-        const int propItem = item->GetProportion();
-        if ( propItem )
+        wxCoord majorSize = GetSizeInMajorDir(sizeThis);
+
+        // if there is not enough space, don't try to distribute negative space
+        // among the children, this would result in overlapping windows which
+        // we don't want
+        if ( delta > 0 )

         {
         {

-            const int deltaItem = (delta * propItem) / totalProportion;
+            const int propItem = item->GetProportion();
+            if ( propItem )
+            {
+                const int deltaItem = (delta * propItem) / totalProportion;

 
 

-            majorSize += deltaItem;
+                majorSize += deltaItem;

 
 

-            delta -= deltaItem;
-            totalProportion -= propItem;
+                delta -= deltaItem;
+                totalProportion -= propItem;
+            }

         }
 
 
         // apply the alignment in the minor direction
         wxPoint posChild(pt);
 
         }
 
 
         // apply the alignment in the minor direction
         wxPoint posChild(pt);
 

-        wxCoord minorSize = SizeInMinorDir(sizeThis);
+        wxCoord minorSize = GetSizeInMinorDir(sizeThis);

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


@@ -1750,10 +2027,9 @@ wxSize wxBoxSizer::CalcMin()
             continue;
 
         const wxSize sizeMinThis = item->CalcMin();
             continue;
 
         const wxSize sizeMinThis = item->CalcMin();

-
-        SizeInMajorDir(m_minSize) += SizeInMajorDir(sizeMinThis);
-        if ( SizeInMinorDir(sizeMinThis) > SizeInMinorDir(m_minSize) )
-            SizeInMinorDir(m_minSize) = SizeInMinorDir(sizeMinThis);
+        SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
+        if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
+            SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);

 
         m_totalProportion += item->GetProportion();
     }
 
         m_totalProportion += item->GetProportion();
     }


@@ -1974,7 +2250,7 @@ void wxStdDialogButtonSizer::Realize()
             Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
         }
 
             Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
         }
 

-        // according to HIG, in explicit apply windows the order is: 
+        // 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);
         // [ Help                     Apply   Cancel   OK ]
         if (m_buttonApply)
             Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);