]> git.saurik.com Git - wxWidgets.git/blobdiff - src/generic/grid.cpp
added code for wxMac properly resetting the cursor
[wxWidgets.git] / src / generic / grid.cpp
index 5ff1ee3ecb6d2fbe761cc2c9938aebfcbe3e160e..9c4fea03b6176232cd1c4ba0fe669d6c7b926c4b 100644 (file)
@@ -629,6 +629,7 @@ void wxGridCellTextEditor::DoBeginEdit(const wxString& startValue)
 {
     Text()->SetValue(startValue);
     Text()->SetInsertionPointEnd();
+    Text()->SetSelection(-1,-1);
     Text()->SetFocus();
 }
 
@@ -721,7 +722,7 @@ void wxGridCellTextEditor::HandleReturn( wxKeyEvent&
     // wxMotif needs a little extra help...
     size_t pos = (size_t)( Text()->GetInsertionPoint() );
     wxString s( Text()->GetValue() );
-    s = s.Left(pos) + "\n" + s.Mid(pos);
+    s = s.Left(pos) + wxT("\n") + s.Mid(pos);
     Text()->SetValue(s);
     Text()->SetInsertionPoint( pos );
 #else
@@ -797,8 +798,9 @@ void wxGridCellNumberEditor::BeginEdit(int row, int col, wxGrid* grid)
     }
     else
     {
+        m_valueOld = 0;
         wxString sValue = table->GetValue(row, col);
-        if (! sValue.ToLong(&m_valueOld))
+        if (! sValue.ToLong(&m_valueOld) && ! sValue.IsEmpty())
         {
             wxFAIL_MSG( _T("this cell doesn't have numeric value") );
             return;
@@ -820,16 +822,20 @@ bool wxGridCellNumberEditor::EndEdit(int row, int col,
                                      wxGrid* grid)
 {
     bool changed;
-    long value;
+    long value = 0;
+    wxString text;
 
     if ( HasRange() )
     {
         value = Spin()->GetValue();
         changed = value != m_valueOld;
+        if (changed)
+            text = wxString::Format(wxT("%ld"), value);
     }
     else
     {
-        changed = Text()->GetValue().ToLong(&value) && (value != m_valueOld);
+        text = Text()->GetValue();
+        changed = (text.IsEmpty() || text.ToLong(&value)) && (value != m_valueOld);
     }
 
     if ( changed )
@@ -837,7 +843,7 @@ bool wxGridCellNumberEditor::EndEdit(int row, int col,
         if (grid->GetTable()->CanSetValueAs(row, col, wxGRID_VALUE_NUMBER))
             grid->GetTable()->SetValueAsLong(row, col, value);
         else
-            grid->GetTable()->SetValue(row, col, wxString::Format(wxT("%ld"), value));
+            grid->GetTable()->SetValue(row, col, text);
     }
 
     return changed;
@@ -894,7 +900,21 @@ void wxGridCellNumberEditor::StartingKey(wxKeyEvent& event)
     if ( !HasRange() )
     {
         int keycode = (int) event.KeyCode();
-        if ( isdigit(keycode) || keycode == '+' || keycode == '-' )
+        if ( isdigit(keycode) || keycode == '+' || keycode == '-'
+            || keycode ==  WXK_NUMPAD0
+            || keycode ==  WXK_NUMPAD1
+            || keycode ==  WXK_NUMPAD2
+            || keycode ==  WXK_NUMPAD3
+            || keycode ==  WXK_NUMPAD4
+            || keycode ==  WXK_NUMPAD5
+            || keycode ==  WXK_NUMPAD6
+            || keycode ==  WXK_NUMPAD7
+            || keycode ==  WXK_NUMPAD8
+            || keycode ==  WXK_NUMPAD9
+            || keycode ==  WXK_ADD
+            || keycode ==  WXK_NUMPAD_ADD
+            || keycode ==  WXK_SUBTRACT
+            || keycode ==  WXK_NUMPAD_SUBTRACT)
         {
             wxGridCellTextEditor::StartingKey(event);
 
@@ -965,8 +985,9 @@ void wxGridCellFloatEditor::BeginEdit(int row, int col, wxGrid* grid)
     }
     else
     {
+        m_valueOld = 0.0;
         wxString sValue = table->GetValue(row, col);
-        if (! sValue.ToDouble(&m_valueOld))
+        if (! sValue.ToDouble(&m_valueOld) && ! sValue.IsEmpty())
         {
             wxFAIL_MSG( _T("this cell doesn't have float value") );
             return;
@@ -979,20 +1000,19 @@ void wxGridCellFloatEditor::BeginEdit(int row, int col, wxGrid* grid)
 bool wxGridCellFloatEditor::EndEdit(int row, int col,
                                      wxGrid* grid)
 {
-    double value;
-    if ( Text()->GetValue().ToDouble(&value) && (value != m_valueOld) )
+    double value = 0.0;
+    wxString text(Text()->GetValue());
+
+    if ( (text.IsEmpty() || text.ToDouble(&value)) && (value != m_valueOld) )
     {
         if (grid->GetTable()->CanSetValueAs(row, col, wxGRID_VALUE_FLOAT))
             grid->GetTable()->SetValueAsDouble(row, col, value);
         else
-            grid->GetTable()->SetValue(row, col, wxString::Format(wxT("%f"), value));
+            grid->GetTable()->SetValue(row, col, text);
 
         return TRUE;
     }
-    else
-    {
-        return FALSE;
-    }
+    return FALSE;
 }
 
 void wxGridCellFloatEditor::Reset()
@@ -1003,8 +1023,21 @@ void wxGridCellFloatEditor::Reset()
 void wxGridCellFloatEditor::StartingKey(wxKeyEvent& event)
 {
     int keycode = (int)event.KeyCode();
-    if ( isdigit(keycode) ||
-         keycode == '+' || keycode == '-' || keycode == '.' )
+        if ( isdigit(keycode) || keycode == '+' || keycode == '-' || keycode == '.'
+            || keycode ==  WXK_NUMPAD0
+            || keycode ==  WXK_NUMPAD1
+            || keycode ==  WXK_NUMPAD2
+            || keycode ==  WXK_NUMPAD3
+            || keycode ==  WXK_NUMPAD4
+            || keycode ==  WXK_NUMPAD5
+            || keycode ==  WXK_NUMPAD6
+            || keycode ==  WXK_NUMPAD7
+            || keycode ==  WXK_NUMPAD8
+            || keycode ==  WXK_NUMPAD9
+            || keycode ==  WXK_ADD
+            || keycode ==  WXK_NUMPAD_ADD
+            || keycode ==  WXK_SUBTRACT
+            || keycode ==  WXK_NUMPAD_SUBTRACT)
     {
         wxGridCellTextEditor::StartingKey(event);
 
@@ -1049,16 +1082,16 @@ wxString wxGridCellFloatEditor::GetString() const
     if ( m_width == -1 )
     {
         // default width/precision
-        fmt = _T("%g");
+        fmt = _T("%f");
     }
     else if ( m_precision == -1 )
     {
         // default precision
-        fmt.Printf(_T("%%%d.g"), m_width);
+        fmt.Printf(_T("%%%d.f"), m_width);
     }
     else
     {
-        fmt.Printf(_T("%%%d.%dg"), m_width, m_precision);
+        fmt.Printf(_T("%%%d.%df"), m_width, m_precision);
     }
 
     return wxString::Format(fmt, m_valueOld);
@@ -1092,7 +1125,7 @@ bool wxGridCellFloatEditor::IsAcceptedKey(wxKeyEvent& event)
             default:
                 // additionally accept 'e' as in '1e+6'
                 if ( (keycode < 128) &&
-                     (isdigit(keycode) || tolower(keycode) == 'e') )
+                     (isdigit(keycode) || tolower(keycode) == wxT('e')) )
                     return TRUE;
         }
     }
@@ -1184,7 +1217,7 @@ void wxGridCellBoolEditor::BeginEdit(int row, int col, wxGrid* grid)
     else
     {
         wxString cellval( grid->GetTable()->GetValue(row, col) );
-        m_startValue = !( !cellval || (cellval == "0") );
+        m_startValue = !( !cellval || (cellval == wxT("0")) );
     }
     CBox()->SetValue(m_startValue);
     CBox()->SetFocus();
@@ -1522,6 +1555,33 @@ void wxGridCellStringRenderer::Draw(wxGrid& grid,
                                     int row, int col,
                                     bool isSelected)
 {
+    wxRect rect = rectCell;
+
+    if (attr.GetOverflow())
+    {
+        int cols = grid.GetNumberCols();
+        int best_width = GetBestSize(grid,attr,dc,row,col).GetWidth();
+        int cell_rows, cell_cols;
+        attr.GetSize( &cell_rows, &cell_cols ); // shouldn't get here if <=0
+        if ((best_width > rectCell.width) && (col < cols) && grid.GetTable())
+        {
+            int i, c_cols, c_rows;
+            for (i = col+cell_cols; i < cols; i++)
+            {
+                // check w/ anchor cell for multicell block
+                grid.GetCellSize(row, i, &c_rows, &c_cols);
+                if (c_rows > 0) c_rows = 0;
+                if (grid.GetTable()->IsEmptyCell(row+c_rows, i))
+                {
+                    rect.width += grid.GetColSize(i);
+                    if (rect.width >= best_width) break;
+                }
+                else break;
+            }
+        }
+    }
+
+    // erase only this cells background, overflow cells should have been erased
     wxGridCellRenderer::Draw(grid, attr, dc, rectCell, row, col, isSelected);
 
     // now we only have to draw the text
@@ -1530,7 +1590,6 @@ void wxGridCellStringRenderer::Draw(wxGrid& grid,
     int hAlign, vAlign;
     attr.GetAlignment(&hAlign, &vAlign);
 
-    wxRect rect = rectCell;
     rect.Inflate(-1);
 
     grid.DrawTextRectangle(dc, grid.GetCellValue(row, col),
@@ -1804,7 +1863,7 @@ void wxGridCellBoolRenderer::Draw(wxGrid& grid,
     else
     {
         wxString cellval( grid.GetTable()->GetValue(row, col) );
-        value = !( !cellval || (cellval == "0") );
+        value = !( !cellval || (cellval == wxT("0")) );
     }
 
     if ( value )
@@ -1843,6 +1902,9 @@ void wxGridCellAttr::Init(wxGridCellAttr *attrDefault)
 
     m_attrkind = wxGridCellAttr::Cell;
 
+    m_sizeRows = m_sizeCols = 1;
+    m_overflow = TRUE;
+
     SetDefAttr(attrDefault);
 }
 
@@ -1859,6 +1921,8 @@ wxGridCellAttr *wxGridCellAttr::Clone() const
     if ( HasAlignment() )
         attr->SetAlignment(m_hAlign, m_vAlign);
 
+    attr->SetSize( m_sizeRows, m_sizeCols );
+
     if ( m_renderer )
     {
         attr->SetRenderer(m_renderer);
@@ -1886,12 +1950,14 @@ void wxGridCellAttr::MergeWith(wxGridCellAttr *mergefrom)
         SetBackgroundColour(mergefrom->GetBackgroundColour());
     if ( !HasFont() && mergefrom->HasFont() )
         SetFont(mergefrom->GetFont());
-    if ( !!HasAlignment() && mergefrom->HasAlignment() ){
+    if ( !HasAlignment() && mergefrom->HasAlignment() ){
         int hAlign, vAlign;
         mergefrom->GetAlignment( &hAlign, &vAlign);
         SetAlignment(hAlign, vAlign);
     }
 
+    mergefrom->GetSize( &m_sizeRows, &m_sizeCols );
+
     // Directly access member functions as GetRender/Editor don't just return
     // m_renderer/m_editor
     //
@@ -1912,6 +1978,27 @@ void wxGridCellAttr::MergeWith(wxGridCellAttr *mergefrom)
     SetDefAttr(mergefrom->m_defGridAttr);
 }
 
+void wxGridCellAttr::SetSize(int num_rows, int num_cols)
+{
+    // The size of a cell is normally 1,1
+
+    // If this cell is larger (2,2) then this is the top left cell
+    // the other cells that will be covered (lower right cells) must be
+    // set to negative or zero values such that
+    // row + num_rows of the covered cell points to the larger cell (this cell)
+    // same goes for the col + num_cols.
+
+    // Size of 0,0 is NOT valid, neither is <=0 and any positive value
+
+    wxASSERT_MSG( (!((num_rows>0)&&(num_cols<=0)) ||
+                  !((num_rows<=0)&&(num_cols>0)) ||
+                  !((num_rows==0)&&(num_cols==0))),
+                  wxT("wxGridCellAttr::SetSize only takes two postive values or negative/zero values"));
+
+    m_sizeRows = num_rows;
+    m_sizeCols = num_cols;
+}
+
 const wxColour& wxGridCellAttr::GetTextColour() const
 {
     if (HasTextColour())
@@ -1973,6 +2060,11 @@ void wxGridCellAttr::GetAlignment(int *hAlign, int *vAlign) const
     }
 }
 
+void wxGridCellAttr::GetSize( int *num_rows, int *num_cols ) const
+{
+    if ( num_rows ) *num_rows = m_sizeRows;
+    if ( num_cols ) *num_cols = m_sizeCols;
+}
 
 // GetRenderer and GetEditor use a slightly different decision path about
 // which attribute to use.  If a non-default attr object has one then it is
@@ -2850,21 +2942,13 @@ wxGridStringTable::wxGridStringTable()
 wxGridStringTable::wxGridStringTable( int numRows, int numCols )
         : wxGridTableBase()
 {
-    int row, col;
-
     m_data.Alloc( numRows );
 
     wxArrayString sa;
     sa.Alloc( numCols );
-    for ( col = 0;  col < numCols;  col++ )
-    {
-        sa.Add( wxEmptyString );
-    }
+    sa.Add( wxEmptyString, numCols );
 
-    for ( row = 0;  row < numRows;  row++ )
-    {
-        m_data.Add( sa );
-    }
+    m_data.Add( sa, numRows );
 }
 
 wxGridStringTable::~wxGridStringTable()
@@ -2931,8 +3015,6 @@ void wxGridStringTable::Clear()
 
 bool wxGridStringTable::InsertRows( size_t pos, size_t numRows )
 {
-    size_t row, col;
-
     size_t curNumRows = m_data.GetCount();
     size_t curNumCols = ( curNumRows > 0 ? m_data[0].GetCount() :
                           ( GetView() ? GetView()->GetNumberCols() : 0 ) );
@@ -2944,15 +3026,8 @@ bool wxGridStringTable::InsertRows( size_t pos, size_t numRows )
 
     wxArrayString sa;
     sa.Alloc( curNumCols );
-    for ( col = 0;  col < curNumCols;  col++ )
-    {
-        sa.Add( wxEmptyString );
-    }
-
-    for ( row = pos;  row < pos + numRows;  row++ )
-    {
-        m_data.Insert( sa, row );
-    }
+    sa.Add( wxEmptyString, curNumCols );
+    m_data.Insert( sa, pos, numRows );
     if ( GetView() )
     {
         wxGridTableMessage msg( this,
@@ -2968,8 +3043,6 @@ bool wxGridStringTable::InsertRows( size_t pos, size_t numRows )
 
 bool wxGridStringTable::AppendRows( size_t numRows )
 {
-    size_t row, col;
-
     size_t curNumRows = m_data.GetCount();
     size_t curNumCols = ( curNumRows > 0 ? m_data[0].GetCount() :
                           ( GetView() ? GetView()->GetNumberCols() : 0 ) );
@@ -2978,16 +3051,10 @@ bool wxGridStringTable::AppendRows( size_t numRows )
     if ( curNumCols > 0 )
     {
         sa.Alloc( curNumCols );
-        for ( col = 0;  col < curNumCols;  col++ )
-        {
-            sa.Add( wxEmptyString );
-        }
+        sa.Add( wxEmptyString, curNumCols );
     }
 
-    for ( row = 0;  row < numRows;  row++ )
-    {
-        m_data.Add( sa );
-    }
+    m_data.Add( sa, numRows );
 
     if ( GetView() )
     {
@@ -3003,8 +3070,6 @@ bool wxGridStringTable::AppendRows( size_t numRows )
 
 bool wxGridStringTable::DeleteRows( size_t pos, size_t numRows )
 {
-    size_t n;
-
     size_t curNumRows = m_data.GetCount();
 
     if ( pos >= curNumRows )
@@ -3027,10 +3092,7 @@ bool wxGridStringTable::DeleteRows( size_t pos, size_t numRows )
     }
     else
     {
-        for ( n = 0;  n < numRows;  n++ )
-        {
-            m_data.RemoveAt( pos );
-        }
+        m_data.RemoveAt( pos, numRows );
     }
     if ( GetView() )
     {
@@ -3080,7 +3142,7 @@ bool wxGridStringTable::InsertCols( size_t pos, size_t numCols )
 
 bool wxGridStringTable::AppendCols( size_t numCols )
 {
-    size_t row, n;
+    size_t row;
 
     size_t curNumRows = m_data.GetCount();
 #if 0
@@ -3095,10 +3157,7 @@ bool wxGridStringTable::AppendCols( size_t numCols )
 
     for ( row = 0;  row < curNumRows;  row++ )
     {
-        for ( n = 0;  n < numCols;  n++ )
-        {
-            m_data[row].Add( wxEmptyString );
-        }
+        m_data[row].Add( wxEmptyString, numCols );
     }
 
     if ( GetView() )
@@ -3115,7 +3174,7 @@ bool wxGridStringTable::AppendCols( size_t numCols )
 
 bool wxGridStringTable::DeleteCols( size_t pos, size_t numCols )
 {
-    size_t row, n;
+    size_t row;
 
     size_t curNumRows = m_data.GetCount();
     size_t curNumCols = ( curNumRows > 0 ? m_data[0].GetCount() :
@@ -3143,10 +3202,7 @@ bool wxGridStringTable::DeleteCols( size_t pos, size_t numCols )
         }
         else
         {
-            for ( n = 0;  n < numCols;  n++ )
-            {
-                m_data[row].RemoveAt( pos );
-            }
+            m_data[row].RemoveAt( pos, numCols );
         }
     }
     if ( GetView() )
@@ -3435,7 +3491,7 @@ wxGridWindow::wxGridWindow( wxGrid *parent,
                             wxGridRowLabelWindow *rowLblWin,
                             wxGridColLabelWindow *colLblWin,
                             wxWindowID id, const wxPoint &pos, const wxSize &size )
-        : wxWindow( parent, id, pos, size, wxWANTS_CHARS, "grid window" )
+        : wxWindow( parent, id, pos, size, wxWANTS_CHARS, wxT("grid window") )
 {
     m_owner = parent;
     m_rowLabelWin = rowLblWin;
@@ -3504,7 +3560,7 @@ void wxGridWindow::OnEraseBackground( wxEraseEvent& WXUNUSED(event) )
 
 // Internal Helper function for computing row or column from some
 // (unscrolled) coordinate value, using either
-// m_defaultRowHeight/m_defaultColWidth or binary search on array 
+// m_defaultRowHeight/m_defaultColWidth or binary search on array
 // of m_rowBottoms/m_ColRights to speed up the search!
 
 // Internal helper macros for simpler use of that function
@@ -3604,7 +3660,8 @@ void wxGrid::Create()
 
     // create the type registry
     m_typeRegistry = new wxGridTypeRegistry;
-    m_selection = 0;
+    m_selection = NULL;
+
     // subwindow components that make up the wxGrid
     m_cornerLabelWin = new wxGridCornerLabelWindow( this,
                                                     -1,
@@ -3670,9 +3727,9 @@ bool wxGrid::SetTable( wxGridTableBase *table, bool takeOwnership,
     if ( m_created )
     {
         // RD: Actually, this should probably be allowed.  I think it would be
-        // nice to be able to switch multiple Tables in and out of a single
-        // View at runtime.  Is there anything in the implmentation that would
-        // prevent this?
+        //     nice to be able to switch multiple Tables in and out of a single
+        //     View at runtime.  Is there anything in the implementation that
+        //     would prevent this?
 
         // At least, you now have to cope with m_selection
         wxFAIL_MSG( wxT("wxGrid::CreateGrid or wxGrid::SetTable called more than once") );
@@ -3793,9 +3850,11 @@ void wxGrid::InitRowHeights()
     m_rowBottoms.Alloc( m_numRows );
 
     int rowBottom = 0;
+    
+    m_rowHeights.Add( m_defaultRowHeight, m_numRows );
+
     for ( int i = 0;  i < m_numRows;  i++ )
     {
-        m_rowHeights.Add( m_defaultRowHeight );
         rowBottom += m_defaultRowHeight;
         m_rowBottoms.Add( rowBottom );
     }
@@ -3809,9 +3868,11 @@ void wxGrid::InitColWidths()
     m_colWidths.Alloc( m_numCols );
     m_colRights.Alloc( m_numCols );
     int colRight = 0;
+
+    m_colWidths.Add( m_defaultColWidth, m_numCols );
+
     for ( int i = 0;  i < m_numCols;  i++ )
     {
-        m_colWidths.Add( m_defaultColWidth );
         colRight += m_defaultColWidth;
         m_colRights.Add( colRight );
     }
@@ -3930,6 +3991,15 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
     int i;
     bool result = FALSE;
 
+    // Clear the attribute cache as the attribute might refer to a different
+    // cell than stored in the cache after adding/removing rows/columns.
+    ClearAttrCache();
+    // By the same reasoning, the editor should be dismissed if columns are
+    // added or removed. And for consistency, it should IMHO always be
+    // removed, not only if the cell "underneath" it actually changes.
+    // For now, I intentionally do not save the editor's content as the
+    // cell it might want to save that stuff to might no longer exist.
+    DisableCellEditControl();
 #if 0
     // if we were using the default widths/heights so far, we must change them
     // now
@@ -3955,11 +4025,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
 
             if ( !m_rowHeights.IsEmpty() )
             {
-                for ( i = 0;  i < numRows;  i++ )
-                {
-                    m_rowHeights.Insert( m_defaultRowHeight, pos );
-                    m_rowBottoms.Insert( 0, pos );
-                }
+                m_rowHeights.Insert( m_defaultRowHeight, pos, numRows );
+                m_rowBottoms.Insert( 0, pos, numRows );
 
                 int bottom = 0;
                 if ( pos > 0 ) bottom = m_rowBottoms[pos-1];
@@ -3977,7 +4044,9 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
                 //
                 SetCurrentCell( 0, 0 );
             }
-            m_selection->UpdateRows( pos, numRows );
+
+            if ( m_selection )
+                m_selection->UpdateRows( pos, numRows );
             wxGridCellAttrProvider * attrProvider = m_table->GetAttrProvider();
             if (attrProvider)
                 attrProvider->UpdateAttrRows( pos, numRows );
@@ -3999,11 +4068,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
 
             if ( !m_rowHeights.IsEmpty() )
             {
-                for ( i = 0;  i < numRows;  i++ )
-                {
-                    m_rowHeights.Add( m_defaultRowHeight );
-                    m_rowBottoms.Add( 0 );
-                }
+                m_rowHeights.Add( m_defaultRowHeight, numRows );
+                m_rowBottoms.Add( 0, numRows );
 
                 int bottom = 0;
                 if ( oldNumRows > 0 ) bottom = m_rowBottoms[oldNumRows-1];
@@ -4038,11 +4104,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
 
             if ( !m_rowHeights.IsEmpty() )
             {
-                for ( i = 0;  i < numRows;  i++ )
-                {
-                    m_rowHeights.RemoveAt( pos );
-                    m_rowBottoms.RemoveAt( pos );
-                }
+                m_rowHeights.RemoveAt( pos, numRows );
+                m_rowBottoms.RemoveAt( pos, numRows );
 
                 int h = 0;
                 for ( i = 0;  i < m_numRows;  i++ )
@@ -4060,7 +4123,9 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
                 if ( m_currentCellCoords.GetRow() >= m_numRows )
                     m_currentCellCoords.Set( 0, 0 );
             }
-            m_selection->UpdateRows( pos, -((int)numRows) );
+
+            if ( m_selection )
+                m_selection->UpdateRows( pos, -((int)numRows) );
             wxGridCellAttrProvider * attrProvider = m_table->GetAttrProvider();
             if (attrProvider) {
                 attrProvider->UpdateAttrRows( pos, -((int)numRows) );
@@ -4092,11 +4157,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
 
             if ( !m_colWidths.IsEmpty() )
             {
-                for ( i = 0;  i < numCols;  i++ )
-                {
-                    m_colWidths.Insert( m_defaultColWidth, pos );
-                    m_colRights.Insert( 0, pos );
-                }
+                m_colWidths.Insert( m_defaultColWidth, pos, numCols );
+                m_colRights.Insert( 0, pos, numCols );
 
                 int right = 0;
                 if ( pos > 0 ) right = m_colRights[pos-1];
@@ -4114,7 +4176,9 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
                 //
                 SetCurrentCell( 0, 0 );
             }
-            m_selection->UpdateCols( pos, numCols );
+
+            if ( m_selection )
+                m_selection->UpdateCols( pos, numCols );
             wxGridCellAttrProvider * attrProvider = m_table->GetAttrProvider();
             if (attrProvider)
                 attrProvider->UpdateAttrCols( pos, numCols );
@@ -4135,11 +4199,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
             m_numCols += numCols;
             if ( !m_colWidths.IsEmpty() )
             {
-                for ( i = 0;  i < numCols;  i++ )
-                {
-                    m_colWidths.Add( m_defaultColWidth );
-                    m_colRights.Add( 0 );
-                }
+                m_colWidths.Add( m_defaultColWidth, numCols );
+                m_colRights.Add( 0, numCols );
 
                 int right = 0;
                 if ( oldNumCols > 0 ) right = m_colRights[oldNumCols-1];
@@ -4174,11 +4235,8 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
 
             if ( !m_colWidths.IsEmpty() )
             {
-                for ( i = 0;  i < numCols;  i++ )
-                {
-                    m_colWidths.RemoveAt( pos );
-                    m_colRights.RemoveAt( pos );
-                }
+                m_colWidths.RemoveAt( pos, numCols );
+                m_colRights.RemoveAt( pos, numCols );
 
                 int w = 0;
                 for ( i = 0;  i < m_numCols;  i++ )
@@ -4196,7 +4254,9 @@ bool wxGrid::Redimension( wxGridTableMessage& msg )
                 if ( m_currentCellCoords.GetCol() >= m_numCols )
                   m_currentCellCoords.Set( 0, 0 );
             }
-            m_selection->UpdateCols( pos, -((int)numCols) );
+
+            if ( m_selection )
+                m_selection->UpdateCols( pos, -((int)numCols) );
             wxGridCellAttrProvider * attrProvider = m_table->GetAttrProvider();
             if (attrProvider) {
                 attrProvider->UpdateAttrCols( pos, -((int)numCols) );
@@ -4431,11 +4491,14 @@ void wxGrid::ProcessRowLabelMouseEvent( wxMouseEvent& event )
                 case WXGRID_CURSOR_SELECT_ROW:
                     if ( (row = YToRow( y )) >= 0 )
                     {
-                        m_selection->SelectRow( row,
-                                                event.ControlDown(),
-                                                event.ShiftDown(),
-                                                event.AltDown(),
-                                                event.MetaDown() );
+                        if ( m_selection )
+                        {
+                            m_selection->SelectRow( row,
+                                                    event.ControlDown(),
+                                                    event.ShiftDown(),
+                                                    event.AltDown(),
+                                                    event.MetaDown() );
+                        }
                     }
 
                 // default label to suppress warnings about "enumeration value
@@ -4452,7 +4515,7 @@ void wxGrid::ProcessRowLabelMouseEvent( wxMouseEvent& event )
 
     if (m_isDragging)
     {
-        m_rowLabelWin->ReleaseMouse();
+        if (m_rowLabelWin->HasCapture()) m_rowLabelWin->ReleaseMouse();
         m_isDragging = FALSE;
     }
 
@@ -4480,21 +4543,29 @@ void wxGrid::ProcessRowLabelMouseEvent( wxMouseEvent& event )
             {
                 if ( !event.ShiftDown() && !event.ControlDown() )
                     ClearSelection();
-                if ( event.ShiftDown() )
-                    m_selection->SelectBlock( m_currentCellCoords.GetRow(),
-                                              0,
-                                              row,
-                                              GetNumberCols() - 1,
-                                              event.ControlDown(),
-                                              event.ShiftDown(),
-                                              event.AltDown(),
-                                              event.MetaDown() );
-                else
-                    m_selection->SelectRow( row,
-                                            event.ControlDown(),
-                                            event.ShiftDown(),
-                                            event.AltDown(),
-                                            event.MetaDown() );
+                else if ( m_selection )
+                {
+                    if ( event.ShiftDown() )
+                    {
+                        m_selection->SelectBlock( m_currentCellCoords.GetRow(),
+                                                  0,
+                                                  row,
+                                                  GetNumberCols() - 1,
+                                                  event.ControlDown(),
+                                                  event.ShiftDown(),
+                                                  event.AltDown(),
+                                                  event.MetaDown() );
+                    }
+                    else
+                    {
+                        m_selection->SelectRow( row,
+                                                event.ControlDown(),
+                                                event.ShiftDown(),
+                                                event.AltDown(),
+                                                event.MetaDown() );
+                    }
+                }
+
                 ChangeCursorMode(WXGRID_CURSOR_SELECT_ROW, m_rowLabelWin);
             }
         }
@@ -4627,11 +4698,14 @@ void wxGrid::ProcessColLabelMouseEvent( wxMouseEvent& event )
                 case WXGRID_CURSOR_SELECT_COL:
                     if ( (col = XToCol( x )) >= 0 )
                     {
-                        m_selection->SelectCol( col,
-                                                event.ControlDown(),
-                                                event.ShiftDown(),
-                                                event.AltDown(),
-                                                event.MetaDown() );
+                        if ( m_selection )
+                        {
+                            m_selection->SelectCol( col,
+                                                    event.ControlDown(),
+                                                    event.ShiftDown(),
+                                                    event.AltDown(),
+                                                    event.MetaDown() );
+                        }
                     }
 
                 // default label to suppress warnings about "enumeration value
@@ -4648,7 +4722,7 @@ void wxGrid::ProcessColLabelMouseEvent( wxMouseEvent& event )
 
     if (m_isDragging)
     {
-        m_colLabelWin->ReleaseMouse();
+        if (m_colLabelWin->HasCapture()) m_colLabelWin->ReleaseMouse();
         m_isDragging = FALSE;
     }
 
@@ -4676,20 +4750,28 @@ void wxGrid::ProcessColLabelMouseEvent( wxMouseEvent& event )
             {
                 if ( !event.ShiftDown() && !event.ControlDown() )
                     ClearSelection();
-                if ( event.ShiftDown() )
-                    m_selection->SelectBlock( 0,
-                                              m_currentCellCoords.GetCol(),
-                                              GetNumberRows() - 1, col,
-                                              event.ControlDown(),
-                                              event.ShiftDown(),
-                                              event.AltDown(),
-                                              event.MetaDown() );
-                else
-                    m_selection->SelectCol( col,
-                                            event.ControlDown(),
-                                            event.ShiftDown(),
-                                            event.AltDown(),
-                                            event.MetaDown() );
+                if ( m_selection )
+                {
+                    if ( event.ShiftDown() )
+                    {
+                        m_selection->SelectBlock( 0,
+                                                  m_currentCellCoords.GetCol(),
+                                                  GetNumberRows() - 1, col,
+                                                  event.ControlDown(),
+                                                  event.ShiftDown(),
+                                                  event.AltDown(),
+                                                  event.MetaDown() );
+                    }
+                    else
+                    {
+                        m_selection->SelectCol( col,
+                                                event.ControlDown(),
+                                                event.ShiftDown(),
+                                                event.AltDown(),
+                                                event.MetaDown() );
+                    }
+                }
+
                 ChangeCursorMode(WXGRID_CURSOR_SELECT_COL, m_colLabelWin);
             }
         }
@@ -4850,7 +4932,7 @@ void wxGrid::ChangeCursorMode(CursorMode mode,
 
     if ( m_winCapture )
     {
-        m_winCapture->ReleaseMouse();
+        if (m_winCapture->HasCapture()) m_winCapture->ReleaseMouse();
         m_winCapture = (wxWindow *)NULL;
     }
 
@@ -4890,6 +4972,14 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
     wxGridCellCoords coords;
     XYToCell( x, y, coords );
 
+    int cell_rows, cell_cols;
+    GetCellSize( coords.GetRow(), coords.GetCol(), &cell_rows, &cell_cols );
+    if ((cell_rows < 0) || (cell_cols < 0))
+    {
+        coords.SetRow(coords.GetRow() + cell_rows);
+        coords.SetCol(coords.GetCol() + cell_cols);
+    }
+
     if ( event.Dragging() )
     {
         //wxLogDebug("pos(%d, %d) coords(%d, %d)", pos.x, pos.y, coords.GetRow(), coords.GetCol());
@@ -5021,14 +5111,17 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                 ClearSelection();
             if ( event.ShiftDown() )
             {
-                m_selection->SelectBlock( m_currentCellCoords.GetRow(),
-                                          m_currentCellCoords.GetCol(),
-                                          coords.GetRow(),
-                                          coords.GetCol(),
-                                          event.ControlDown(),
-                                          event.ShiftDown(),
-                                          event.AltDown(),
-                                          event.MetaDown() );
+                if ( m_selection )
+                {
+                    m_selection->SelectBlock( m_currentCellCoords.GetRow(),
+                                              m_currentCellCoords.GetCol(),
+                                              coords.GetRow(),
+                                              coords.GetCol(),
+                                              event.ControlDown(),
+                                              event.ShiftDown(),
+                                              event.AltDown(),
+                                              event.MetaDown() );
+                }
             }
             else if ( XToEdgeOfCol(x) < 0  &&
                       YToEdgeOfRow(y) < 0 )
@@ -5058,12 +5151,15 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                 {
                     if ( event.ControlDown() )
                     {
-                        m_selection->ToggleCellSelection( coords.GetRow(),
-                                                          coords.GetCol(),
-                                                          event.ControlDown(),
-                                                          event.ShiftDown(),
-                                                          event.AltDown(),
-                                                          event.MetaDown() );
+                        if ( m_selection )
+                        {
+                            m_selection->ToggleCellSelection( coords.GetRow(),
+                                                              coords.GetCol(),
+                                                              event.ControlDown(),
+                                                              event.ShiftDown(),
+                                                              event.AltDown(),
+                                                              event.MetaDown() );
+                        }
                         m_selectingTopLeft = wxGridNoCellCoords;
                         m_selectingBottomRight = wxGridNoCellCoords;
                         m_selectingKeyboard = coords;
@@ -5071,9 +5167,14 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                     else
                     {
                         SetCurrentCell( coords );
-                        if ( m_selection->GetSelectionMode()
-                             != wxGrid::wxGridSelectCells)
-                            HighlightBlock( coords, coords );
+                        if ( m_selection )
+                        {
+                            if ( m_selection->GetSelectionMode() !=
+                                    wxGrid::wxGridSelectCells )
+                            {
+                                HighlightBlock( coords, coords );
+                            }
+                        }
                     }
                     m_waitForSlowClick = TRUE;
                 }
@@ -5109,17 +5210,22 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
             {
                 if (m_winCapture)
                 {
-                    m_winCapture->ReleaseMouse();
+                    if (m_winCapture->HasCapture()) m_winCapture->ReleaseMouse();
                     m_winCapture = NULL;
                 }
-                m_selection->SelectBlock( m_selectingTopLeft.GetRow(),
-                                          m_selectingTopLeft.GetCol(),
-                                          m_selectingBottomRight.GetRow(),
-                                          m_selectingBottomRight.GetCol(),
-                                          event.ControlDown(),
-                                          event.ShiftDown(),
-                                          event.AltDown(),
-                                          event.MetaDown() );
+
+                if ( m_selection )
+                {
+                    m_selection->SelectBlock( m_selectingTopLeft.GetRow(),
+                                              m_selectingTopLeft.GetCol(),
+                                              m_selectingBottomRight.GetRow(),
+                                              m_selectingBottomRight.GetCol(),
+                                              event.ControlDown(),
+                                              event.ShiftDown(),
+                                              event.AltDown(),
+                                              event.MetaDown() );
+                }
+
                 m_selectingTopLeft = wxGridNoCellCoords;
                 m_selectingBottomRight = wxGridNoCellCoords;
             }
@@ -5270,6 +5376,26 @@ void wxGrid::DoEndDragResizeRow()
             rect.height = ch - rect.y;
             m_rowLabelWin->Refresh( TRUE, &rect );
             rect.width = cw;
+            // if there is a multicell block, paint all of it
+            if (m_table)
+            {
+                int i, cell_rows, cell_cols, subtract_rows = 0;
+                int leftCol = XToCol(left);
+                int rightCol = XToCol(left+cw);
+                if (leftCol >= 0)
+                {
+                    if (rightCol < 0) rightCol = m_numCols;
+                    for (i=leftCol; i<rightCol; i++)
+                    {
+                        GetCellSize(m_dragRowOrCol, i, &cell_rows, &cell_cols);
+                        if (cell_rows < subtract_rows)
+                            subtract_rows = cell_rows;
+                    }
+                    rect.y = GetRowTop(m_dragRowOrCol + subtract_rows);
+                    CalcScrolledPosition(0, rect.y, &dummy, &rect.y);
+                    rect.height = ch - rect.y;
+                }
+            }
             m_gridWin->Refresh( FALSE, &rect );
         }
 
@@ -5310,6 +5436,26 @@ void wxGrid::DoEndDragResizeCol()
             rect.height = m_colLabelHeight;
             m_colLabelWin->Refresh( TRUE, &rect );
             rect.height = ch;
+            // if there is a multicell block, paint all of it
+            if (m_table)
+            {
+                int i, cell_rows, cell_cols, subtract_cols = 0;
+                int topRow = YToRow(top);
+                int bottomRow = YToRow(top+cw);
+                if (topRow >= 0)
+                {
+                    if (bottomRow < 0) bottomRow = m_numRows;
+                    for (i=topRow; i<bottomRow; i++)
+                    {
+                        GetCellSize(i, m_dragRowOrCol, &cell_rows, &cell_cols);
+                        if (cell_cols < subtract_cols)
+                            subtract_cols = cell_cols;
+                    }
+                    rect.x = GetColLeft(m_dragRowOrCol + subtract_cols);
+                    CalcScrolledPosition(rect.x, 0, &rect.x, &dummy);
+                    rect.width = cw - rect.x;
+                }
+            }
             m_gridWin->Refresh( FALSE, &rect );
         }
 
@@ -5606,6 +5752,43 @@ void wxGrid::OnPaint( wxPaintEvent& WXUNUSED(event) )
     wxPaintDC dc(this);  // needed to prevent zillions of paint events on MSW
 }
 
+void wxGrid::Refresh(bool eraseb, wxRect* rect)
+{
+    // Don't do anything if between Begin/EndBatch...
+    // EndBatch() will do all this on the last nested one anyway.
+    if (! GetBatchCount())
+    {
+        wxScrolledWindow::Refresh(eraseb,rect);
+
+        int off_x=0 ,off_y=0;
+        wxRect * anotherrect = NULL ;
+        
+        if (rect)
+        {
+            //Copy rectangle can get scroll offsets..
+            anotherrect = new wxRect(*rect);
+            CalcScrolledPosition( 0, 0, &off_x, &off_y );
+        }
+        //Corner label Doesn't move from the origin.
+        m_cornerLabelWin->Refresh(eraseb,rect);
+
+        //Move Rect down for row labels...
+        if (rect)
+            rect->Offset(0,off_y);
+        m_rowLabelWin->Refresh(eraseb,rect);
+
+        //Move rect copy along for col labels...
+        if (anotherrect)
+            anotherrect->Offset(off_x,0);
+        m_colLabelWin->Refresh(eraseb,anotherrect);     
+
+        //Move main rect along (so it's down and across!)
+        //  for cell window.
+        if (rect)
+            rect->Offset(off_x,0);
+        m_gridWin->Refresh(eraseb,rect);
+    }
+}
 
 void wxGrid::OnSize( wxSizeEvent& event )
 {
@@ -5775,12 +5958,15 @@ void wxGrid::OnKeyDown( wxKeyEvent& event )
             case WXK_SPACE:
                 if ( event.ControlDown() )
                 {
-                    m_selection->ToggleCellSelection( m_currentCellCoords.GetRow(),
-                                                      m_currentCellCoords.GetCol(),
-                                                      event.ControlDown(),
-                                                      event.ShiftDown(),
-                                                      event.AltDown(),
-                                                      event.MetaDown() );
+                    if ( m_selection )
+                    {
+                        m_selection->ToggleCellSelection( m_currentCellCoords.GetRow(),
+                                                          m_currentCellCoords.GetCol(),
+                                                          event.ControlDown(),
+                                                          event.ShiftDown(),
+                                                          event.AltDown(),
+                                                          event.MetaDown() );
+                    }
                     break;
                 }
                 if ( !IsEditable() )
@@ -5844,14 +6030,20 @@ void wxGrid::OnKeyUp( wxKeyEvent& event )
     {
         if ( m_selectingTopLeft != wxGridNoCellCoords &&
              m_selectingBottomRight != wxGridNoCellCoords )
-            m_selection->SelectBlock( m_selectingTopLeft.GetRow(),
-                                      m_selectingTopLeft.GetCol(),
-                                      m_selectingBottomRight.GetRow(),
-                                      m_selectingBottomRight.GetCol(),
-                                      event.ControlDown(),
-                                      TRUE,
-                                      event.AltDown(),
-                                      event.MetaDown() );
+        {
+            if ( m_selection )
+            {
+                m_selection->SelectBlock( m_selectingTopLeft.GetRow(),
+                                          m_selectingTopLeft.GetCol(),
+                                          m_selectingBottomRight.GetRow(),
+                                          m_selectingBottomRight.GetCol(),
+                                          event.ControlDown(),
+                                          TRUE,
+                                          event.AltDown(),
+                                          event.MetaDown() );
+            }
+        }
+
         m_selectingTopLeft = wxGridNoCellCoords;
         m_selectingBottomRight = wxGridNoCellCoords;
         m_selectingKeyboard = wxGridNoCellCoords;
@@ -5913,16 +6105,20 @@ void wxGrid::HighlightBlock( int topRow, int leftCol, int bottomRow, int rightCo
     int temp;
     wxGridCellCoords updateTopLeft, updateBottomRight;
 
-    if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectRows )
-    {
-        leftCol = 0;
-        rightCol = GetNumberCols() - 1;
-    }
-    else if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectColumns )
+    if ( m_selection )
     {
-        topRow = 0;
-        bottomRow = GetNumberRows() - 1;
+        if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectRows )
+        {
+            leftCol = 0;
+            rightCol = GetNumberCols() - 1;
+        }
+        else if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectColumns )
+        {
+            topRow = 0;
+            bottomRow = GetNumberRows() - 1;
+        }
     }
+
     if ( topRow > bottomRow )
     {
         temp = topRow;
@@ -6090,13 +6286,95 @@ void wxGrid::DrawGridCellArea( wxDC& dc, const wxGridCellCoordsArray& cells )
 {
     if ( !m_numRows || !m_numCols ) return;
 
-    size_t i;
-    size_t numCells = cells.GetCount();
+    int i, j, k, l, numCells = cells.GetCount();
+    int row, col, cell_rows, cell_cols;
+    wxGridCellCoordsArray redrawCells;
 
-    for ( i = 0;  i < numCells;  i++ )
+    for ( i = numCells-1; i >= 0;  i-- )
     {
+        row = cells[i].GetRow();
+        col = cells[i].GetCol();
+        GetCellSize( row, col, &cell_rows, &cell_cols );
+
+        // If this cell is part of a multicell block, find owner for repaint
+        if ( cell_rows <= 0 || cell_cols <= 0 )
+        {
+            wxGridCellCoords cell(row+cell_rows, col+cell_cols);
+            bool marked = FALSE;
+            for ( j = 0;  j < numCells;  j++ )
+            {
+                if ( cell == cells[j] )
+                {
+                    marked = TRUE;
+                    break;;
+                }
+            }
+            if (!marked)
+            {
+                int count = redrawCells.GetCount();
+                for (j = 0; j < count; j++)
+                {
+                    if ( cell == redrawCells[j] )
+                    {
+                        marked = TRUE;
+                        break;
+                    }
+                }
+                if (!marked) redrawCells.Add( cell );
+            }
+            continue; // don't bother drawing this cell
+        }
+
+        // If this cell is empty, find cell to left that might want to overflow
+        if (m_table && m_table->IsEmptyCell(row, col))
+        {
+            for ( l = 0; l < cell_rows; l++ )
+            {
+                for (j = col-1; j >= 0; j--)
+                {
+                    if (!m_table->IsEmptyCell(row+l, j))
+                    {
+                        if (GetCellOverflow(row+l, j))
+                        {
+                            wxGridCellCoords cell(row+l, j);
+                            bool marked = FALSE;
+
+                            for (k = 0; k < numCells; k++)
+                            {
+                                if ( cell == cells[k] )
+                                {
+                                    marked = TRUE;
+                                    break;
+                                }
+                            }
+                            if (!marked)
+                            {
+                                int count = redrawCells.GetCount();
+                                for (k = 0; k < count; k++)
+                                {
+                                    if ( cell == redrawCells[k] )
+                                    {
+                                        marked = TRUE;
+                                        break;
+                                    }
+                                }
+                                if (!marked) redrawCells.Add( cell );
+                            }
+                        }
+                        break;
+                    }
+                }
+            }
+        }
         DrawCell( dc, cells[i] );
     }
+
+    numCells = redrawCells.GetCount();
+
+    for ( i = numCells - 1; i >= 0;  i-- )
+    {
+        DrawCell( dc, redrawCells[i] );
+    }
 }
 
 
@@ -6188,8 +6466,8 @@ void wxGrid::DrawCellHighlight( wxDC& dc, const wxGridCellAttr *attr )
 
     int penWidth = attr->IsReadOnly() ? m_cellHighlightROPenWidth : m_cellHighlightPenWidth;
 
-    if (penWidth > 0) {
-
+    if (penWidth > 0)
+    {
         // The center of th drawn line is where the position/width/height of
         // the rectangle is actually at, (on wxMSW atr least,) so we will
         // reduce the size of the rectangle to compensate for the thickness of
@@ -6239,15 +6517,17 @@ void wxGrid::DrawCellBorder( wxDC& dc, const wxGridCellCoords& coords )
 
     dc.SetPen( wxPen(GetGridLineColour(), 1, wxSOLID) );
 
+    wxRect rect = CellToRect( row, col );
+
     // right hand border
     //
-    dc.DrawLine( GetColRight(col), GetRowTop(row),
-                 GetColRight(col), GetRowBottom(row) );
+    dc.DrawLine( rect.x + rect.width, rect.y,
+                 rect.x + rect.width, rect.y + rect.height + 1 );
 
     // bottom border
     //
-    dc.DrawLine( GetColLeft(col), GetRowBottom(row),
-                 GetColRight(col), GetRowBottom(row) );
+    dc.DrawLine( rect.x,              rect.y + rect.height,
+                 rect.x + rect.width, rect.y + rect.height);
 }
 
 void wxGrid::DrawHighlight(wxDC& dc,const  wxGridCellCoordsArray& cells)
@@ -6289,6 +6569,10 @@ void wxGrid::DrawHighlight(wxDC& dc,const  wxGridCellCoordsArray& cells)
 //
 void wxGrid::DrawAllGridLines( wxDC& dc, const wxRegion & WXUNUSED(reg) )
 {
+#if !WXGRID_DRAW_LINES
+    return;
+#endif
+
     if ( !m_gridLinesEnabled ||
          !m_numRows ||
          !m_numCols ) return;
@@ -6325,6 +6609,43 @@ void wxGrid::DrawAllGridLines( wxDC& dc, const wxRegion & WXUNUSED(reg) )
     right = wxMin( right, GetColRight(m_numCols - 1) );
     bottom = wxMin( bottom, GetRowBottom(m_numRows - 1) );
 
+    // no gridlines inside multicells, clip them out
+    int leftCol   = XToCol(left);
+    int topRow    = YToRow(top);
+    int rightCol  = XToCol(right);
+    int bottomRow = YToRow(bottom);
+    wxRegion clippedcells(0, 0, cw, ch);
+
+    if ((leftCol >= 0) && (topRow >= 0))
+    {
+        if (rightCol  < 0) rightCol  = m_numCols;
+        if (bottomRow < 0) bottomRow = m_numRows;
+
+        int i, j, cell_rows, cell_cols;
+        wxRect rect;
+
+        for (j=topRow; j<bottomRow; j++)
+        {
+            for (i=leftCol; i<rightCol; i++)
+            {
+                GetCellSize( j, i, &cell_rows, &cell_cols );
+                if ((cell_rows > 1) || (cell_cols > 1))
+                {
+                    rect = CellToRect(j,i);
+                    CalcScrolledPosition( rect.x, rect.y, &rect.x, &rect.y );
+                    clippedcells.Subtract(rect);
+                }
+                else if ((cell_rows < 0) || (cell_cols < 0))
+                {
+                    rect = CellToRect(j+cell_rows, i+cell_cols);
+                    CalcScrolledPosition( rect.x, rect.y, &rect.x, &rect.y );
+                    clippedcells.Subtract(rect);
+                }
+            }
+        }
+    }
+    dc.SetClippingRegion( clippedcells );
+
     dc.SetPen( wxPen(GetGridLineColour(), 1, wxSOLID) );
 
     // horizontal grid lines
@@ -6361,6 +6682,7 @@ void wxGrid::DrawAllGridLines( wxDC& dc, const wxRegion & WXUNUSED(reg) )
             dc.DrawLine( colRight, top, colRight, bottom );
         }
     }
+    dc.DestroyClippingRegion();
 }
 
 
@@ -6472,7 +6794,6 @@ void wxGrid::DrawTextRectangle( wxDC& dc,
 {
     wxArrayString lines;
 
-    dc.SetClippingRegion( rect );
     StringToLines( value, lines );
 
 
@@ -6494,6 +6815,7 @@ void wxGrid::DrawTextRectangle( wxDC& dc,
     long textWidth, textHeight;
     long lineWidth, lineHeight;
 
+    dc.SetClippingRegion( rect );
     if ( lines.GetCount() )
     {
         GetTextBoxSize( dc, lines, &textWidth, &textHeight );
@@ -6745,6 +7067,17 @@ void wxGrid::ShowCellEditControl()
             int row = m_currentCellCoords.GetRow();
             int col = m_currentCellCoords.GetCol();
 
+            // if this is part of a multicell, find owner (topleft)
+            int cell_rows, cell_cols;
+            GetCellSize( row, col, &cell_rows, &cell_cols );
+            if ( cell_rows <= 0 || cell_cols <= 0 )
+            {
+                row += cell_rows;
+                col += cell_cols;
+                m_currentCellCoords.SetRow( row );
+                m_currentCellCoords.SetCol( col );
+            }
+
             // convert to scrolled coords
             //
             CalcScrolledPosition( rect.x, rect.y, &rect.x, &rect.y );
@@ -6762,7 +7095,7 @@ void wxGrid::ShowCellEditControl()
 
             // cell is shifted by one pixel
             // However, don't allow x or y to become negative
-            // since the SetSize() method interprets that as 
+            // since the SetSize() method interprets that as
             // "don't change."
             if (rect.x > 0)
                 rect.x--;
@@ -6787,6 +7120,33 @@ void wxGrid::ShowCellEditControl()
 
             editor->Show( TRUE, attr );
 
+            // resize editor to overflow into righthand cells if allowed
+            wxString value = GetCellValue(row, col);
+            if ( (value != wxEmptyString) && (attr->GetOverflow()) )
+            {
+                wxClientDC dc(m_gridWin);
+                wxCoord y = 0, best_width = 0;
+                dc.SetFont(attr->GetFont());
+                dc.GetTextExtent(value, &best_width, &y);
+
+                int cell_rows, cell_cols;
+                attr->GetSize( &cell_rows, &cell_cols );
+
+                if ((best_width > rect.width) && (col < m_numCols) && m_table)
+                {
+                    int i;
+                    for (i = col+cell_cols; i < m_numCols; i++)
+                    {
+                        if (m_table->IsEmptyCell(row,i))
+                        {
+                            rect.width += GetColWidth(i);
+                            if (rect.width >= best_width) break;
+                        }
+                        else
+                            break;
+                    }
+                }
+            }
             editor->SetSize( rect );
 
             editor->BeginEdit(row, col, this);
@@ -6811,7 +7171,10 @@ void wxGrid::HideCellEditControl()
         editor->DecRef();
         attr->DecRef();
         m_gridWin->SetFocus();
-        wxRect rect( CellToRect( row, col ) );
+        // refresh whole row to the right
+        wxRect rect( CellToRect(row, col) );
+        CalcScrolledPosition(rect.x, rect.y, &rect.x, &rect.y );
+        rect.width = m_gridWin->GetClientSize().GetWidth() - rect.x;
         m_gridWin->Refresh( FALSE, &rect );
     }
 }
@@ -6872,7 +7235,7 @@ void wxGrid::XYToCell( int x, int y, wxGridCellCoords& coords )
 
 // Internal Helper function for computing row or column from some
 // (unscrolled) coordinate value, using either
-// m_defaultRowHeight/m_defaultColWidth or binary search on array 
+// m_defaultRowHeight/m_defaultColWidth or binary search on array
 // of m_rowBottoms/m_ColRights to speed up the search!
 
 static int CoordToRowOrCol(int coord, int defaultDist, int minDist,
@@ -6889,7 +7252,7 @@ static int CoordToRowOrCol(int coord, int defaultDist, int minDist,
 
     if ( i_max >= BorderArray.GetCount())
         i_max = BorderArray.GetCount() - 1;
-    else 
+    else
     {
         if ( coord >= BorderArray[i_max])
         {
@@ -6986,10 +7349,20 @@ wxRect wxGrid::CellToRect( int row, int col )
     if ( row >= 0  &&  row < m_numRows  &&
          col >= 0  &&  col < m_numCols )
     {
+        int i, cell_rows, cell_cols;
+        rect.width = rect.height = 0;
+        GetCellSize( row, col, &cell_rows, &cell_cols );
+        // if negative then find multicell owner
+        if (cell_rows < 0) row += cell_rows;
+        if (cell_cols < 0) col += cell_cols;
+        GetCellSize( row, col, &cell_rows, &cell_cols );
+
         rect.x = GetColLeft(col);
         rect.y = GetRowTop(row);
-        rect.width = GetColWidth(col);
-        rect.height = GetRowHeight(row);
+        for (i=col; i<col+cell_cols; i++)
+            rect.width  += GetColWidth(i);
+        for (i=row; i<row+cell_rows; i++)
+            rect.height += GetRowHeight(i);
     }
 
     // if grid lines are enabled, then the area of the cell is a bit smaller
@@ -7642,7 +8015,7 @@ void wxGrid::SetRowLabelSize( int width )
 
         m_rowLabelWidth = width;
         CalcWindowSizes();
-        Refresh( TRUE );
+        wxScrolledWindow::Refresh( TRUE );
     }
 }
 
@@ -7665,7 +8038,7 @@ void wxGrid::SetColLabelSize( int height )
 
         m_colLabelHeight = height;
         CalcWindowSizes();
-        Refresh( TRUE );
+        wxScrolledWindow::Refresh( TRUE );
     }
 }
 
@@ -7948,6 +8321,11 @@ void wxGrid::SetDefaultCellAlignment( int horiz, int vert )
     m_defaultCellAttr->SetAlignment(horiz, vert);
 }
 
+void wxGrid::SetDefaultCellOverflow( bool allow )
+{
+    m_defaultCellAttr->SetOverflow(allow);
+}
+
 void wxGrid::SetDefaultCellFont( const wxFont& font )
 {
     m_defaultCellAttr->SetFont(font);
@@ -7987,6 +8365,11 @@ void wxGrid::GetDefaultCellAlignment( int *horiz, int *vert )
     m_defaultCellAttr->GetAlignment(horiz, vert);
 }
 
+bool wxGrid::GetDefaultCellOverflow()
+{
+    return m_defaultCellAttr->GetOverflow();
+}
+
 wxGridCellRenderer *wxGrid::GetDefaultRenderer() const
 {
     return m_defaultCellAttr->GetRenderer(NULL, 0, 0);
@@ -8032,6 +8415,21 @@ void wxGrid::GetCellAlignment( int row, int col, int *horiz, int *vert )
     attr->DecRef();
 }
 
+bool wxGrid::GetCellOverflow( int row, int col )
+{
+    wxGridCellAttr *attr = GetCellAttr(row, col);
+    bool allow = attr->GetOverflow();
+    attr->DecRef();
+    return allow;
+}
+
+void wxGrid::GetCellSize( int row, int col, int *num_rows, int *num_cols )
+{
+    wxGridCellAttr *attr = GetCellAttr(row, col);
+    attr->GetSize( num_rows, num_cols );
+    attr->DecRef();
+}
+
 wxGridCellRenderer* wxGrid::GetCellRenderer(int row, int col)
 {
     wxGridCellAttr* attr = GetCellAttr(row, col);
@@ -8117,11 +8515,17 @@ bool wxGrid::LookupAttr(int row, int col, wxGridCellAttr **attr) const
 
 wxGridCellAttr *wxGrid::GetCellAttr(int row, int col) const
 {
-    wxGridCellAttr *attr;
-    if ( !LookupAttr(row, col, &attr) )
+    wxGridCellAttr *attr = NULL;
+    // Additional test to avoid looking at the cache e.g. for
+    // wxNoCellCoords, as this will confuse memory management.
+    if ( row >= 0 )
     {
-        attr = m_table ? m_table->GetAttr(row, col , wxGridCellAttr::Any) : (wxGridCellAttr *)NULL;
-        CacheAttr(row, col, attr);
+       if ( !LookupAttr(row, col, &attr) )
+       {
+           attr = m_table ? m_table->GetAttr(row, col , wxGridCellAttr::Any)
+                          : (wxGridCellAttr *)NULL;
+           CacheAttr(row, col, attr);
+       }
     }
     if (attr)
     {
@@ -8199,6 +8603,19 @@ void wxGrid::SetColFormatCustom(int col, const wxString& typeName)
 // setting cell attributes: this is forwarded to the table
 // ----------------------------------------------------------------------------
 
+void wxGrid::SetAttr(int row, int col, wxGridCellAttr *attr)
+{
+    if ( CanHaveAttributes() )
+    {
+        m_table->SetAttr(attr, row, col);
+        ClearAttrCache();
+    }
+    else
+    {
+        wxSafeDecRef(attr);
+    }
+}
+
 void wxGrid::SetRowAttr(int row, wxGridCellAttr *attr)
 {
     if ( CanHaveAttributes() )
@@ -8265,6 +8682,75 @@ void wxGrid::SetCellAlignment( int row, int col, int horiz, int vert )
     }
 }
 
+void wxGrid::SetCellOverflow( int row, int col, bool allow )
+{
+    if ( CanHaveAttributes() )
+    {
+        wxGridCellAttr *attr = GetOrCreateCellAttr(row, col);
+        attr->SetOverflow(allow);
+        attr->DecRef();
+    }
+}
+
+void wxGrid::SetCellSize( int row, int col, int num_rows, int num_cols )
+{
+    if ( CanHaveAttributes() )
+    {
+        int cell_rows, cell_cols;
+
+        wxGridCellAttr *attr = GetOrCreateCellAttr(row, col);
+        attr->GetSize(&cell_rows, &cell_cols);
+        attr->SetSize(num_rows, num_cols);
+        attr->DecRef();
+
+        // Cannot set the size of a cell to 0 or negative values
+        // While it is perfectly legal to do that, this function cannot
+        // handle all the possibilies, do it by hand by getting the CellAttr.
+        // You can only set the size of a cell to 1,1 or greater with this fn
+        wxASSERT_MSG( !((cell_rows < 1) || (cell_cols < 1)),
+                      wxT("wxGrid::SetCellSize setting cell size that is already part of another cell"));
+        wxASSERT_MSG( !((num_rows < 1) || (num_cols < 1)),
+                      wxT("wxGrid::SetCellSize setting cell size to < 1"));
+
+        // if this was already a multicell then "turn off" the other cells first
+        if ((cell_rows > 1) || (cell_rows > 1))
+        {
+            int i, j;
+            for (j=row; j<row+cell_rows; j++)
+            {
+                for (i=col; i<col+cell_cols; i++)
+                {
+                    if ((i != col) || (j != row))
+                    {
+                        wxGridCellAttr *attr_stub = GetOrCreateCellAttr(j, i);
+                        attr_stub->SetSize( 1, 1 );
+                        attr_stub->DecRef();
+                    }
+                }
+            }
+        }
+
+        // mark the cells that will be covered by this cell to
+        // negative or zero values to point back at this cell
+        if (((num_rows > 1) || (num_cols > 1)) && (num_rows >= 1) && (num_cols >= 1))
+        {
+            int i, j;
+            for (j=row; j<row+num_rows; j++)
+            {
+                for (i=col; i<col+num_cols; i++)
+                {
+                    if ((i != col) || (j != row))
+                    {
+                        wxGridCellAttr *attr_stub = GetOrCreateCellAttr(j, i);
+                        attr_stub->SetSize( row-j, col-i );
+                        attr_stub->DecRef();
+                    }
+                }
+            }
+        }
+    }
+}
+
 void wxGrid::SetCellRenderer(int row, int col, wxGridCellRenderer *renderer)
 {
     if ( CanHaveAttributes() )
@@ -8707,8 +9193,17 @@ wxSize wxGrid::DoGetBestSize() const
     // don't set sizes, only calculate them
     wxGrid *self = (wxGrid *)this;  // const_cast
 
-    return wxSize(self->SetOrCalcColumnSizes(TRUE),
-                  self->SetOrCalcRowSizes(TRUE));
+    int width, height;
+    width = self->SetOrCalcColumnSizes(TRUE);
+    height = self->SetOrCalcRowSizes(TRUE);
+
+    int maxwidth, maxheight;
+    wxDisplaySize( & maxwidth, & maxheight );
+
+    if ( width > maxwidth ) width = maxwidth;
+    if ( height > maxheight ) height = maxheight;
+
+    return wxSize( width, height );
 }
 
 void wxGrid::Fit()
@@ -8733,9 +9228,12 @@ void wxGrid::SetCellValue( int row, int col, const wxString& s )
         m_table->SetValue( row, col, s );
         if ( !GetBatchCount() )
         {
-            wxClientDC dc( m_gridWin );
-            PrepareDC( dc );
-            DrawCell( dc, wxGridCellCoords(row, col) );
+            int dummy;
+            wxRect rect( CellToRect( row, col ) );
+            rect.x = 0;
+            rect.width = m_gridWin->GetClientSize().GetWidth();
+            CalcScrolledPosition(0, rect.y, &dummy, &rect.y);
+            m_gridWin->Refresh( FALSE, &rect );
         }
 
         if ( m_currentCellCoords.GetRow() == row &&
@@ -8761,7 +9259,8 @@ void wxGrid::SelectRow( int row, bool addToSelected )
     if ( IsSelection() && !addToSelected )
         ClearSelection();
 
-    m_selection->SelectRow( row, FALSE, addToSelected );
+    if ( m_selection )
+        m_selection->SelectRow( row, FALSE, addToSelected );
 }
 
 
@@ -8770,7 +9269,8 @@ void wxGrid::SelectCol( int col, bool addToSelected )
     if ( IsSelection() && !addToSelected )
         ClearSelection();
 
-    m_selection->SelectCol( col, FALSE, addToSelected );
+    if ( m_selection )
+        m_selection->SelectCol( col, FALSE, addToSelected );
 }
 
 
@@ -8780,15 +9280,19 @@ void wxGrid::SelectBlock( int topRow, int leftCol, int bottomRow, int rightCol,
     if ( IsSelection() && !addToSelected )
         ClearSelection();
 
-    m_selection->SelectBlock( topRow, leftCol, bottomRow, rightCol,
-                              FALSE, addToSelected );
+    if ( m_selection )
+        m_selection->SelectBlock( topRow, leftCol, bottomRow, rightCol,
+                                  FALSE, addToSelected );
 }
 
 
 void wxGrid::SelectAll()
 {
     if ( m_numRows > 0 && m_numCols > 0 )
-        m_selection->SelectBlock( 0, 0, m_numRows-1, m_numCols-1 );
+    {
+        if ( m_selection )
+            m_selection->SelectBlock( 0, 0, m_numRows-1, m_numCols-1 );
+    }
 }
 
 //
@@ -8797,6 +9301,9 @@ void wxGrid::SelectAll()
 
 void wxGrid::DeselectRow( int row )
 {
+    if ( !m_selection )
+        return;
+
     if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectRows )
     {
         if ( m_selection->IsInSelection(row, 0 ) )
@@ -8815,6 +9322,9 @@ void wxGrid::DeselectRow( int row )
 
 void wxGrid::DeselectCol( int col )
 {
+    if ( !m_selection )
+        return;
+
     if ( m_selection->GetSelectionMode() == wxGrid::wxGridSelectColumns )
     {
         if ( m_selection->IsInSelection(0, col ) )
@@ -8833,31 +9343,32 @@ void wxGrid::DeselectCol( int col )
 
 void wxGrid::DeselectCell( int row, int col )
 {
-    if ( m_selection->IsInSelection(row, col) )
+    if ( m_selection && m_selection->IsInSelection(row, col) )
         m_selection->ToggleCellSelection(row, col);
 }
 
 bool wxGrid::IsSelection()
 {
-    return ( m_selection->IsSelection() ||
+    return ( m_selection && (m_selection->IsSelection() ||
              ( m_selectingTopLeft != wxGridNoCellCoords &&
-               m_selectingBottomRight != wxGridNoCellCoords ) );
+               m_selectingBottomRight != wxGridNoCellCoords) ) );
 }
 
-bool wxGrid::IsInSelection( int row, int col )
+bool wxGrid::IsInSelection( int row, int col ) const
 {
-    return ( m_selection->IsInSelection( row, col ) ||
+    return ( m_selection && (m_selection->IsInSelection( row, col ) ||
              ( row >= m_selectingTopLeft.GetRow() &&
                col >= m_selectingTopLeft.GetCol() &&
                row <= m_selectingBottomRight.GetRow() &&
-               col <= m_selectingBottomRight.GetCol() ) );
+               col <= m_selectingBottomRight.GetCol() )) );
 }
 
 void wxGrid::ClearSelection()
 {
     m_selectingTopLeft = wxGridNoCellCoords;
     m_selectingBottomRight = wxGridNoCellCoords;
-    m_selection->ClearSelection();
+    if ( m_selection )
+        m_selection->ClearSelection();
 }
 
 
@@ -8890,11 +9401,41 @@ wxRect wxGrid::BlockToDeviceRect( const wxGridCellCoords &topLeft,
         return wxGridNoCellRect;
     }
 
+    int i, j;
+    int left = rect.GetLeft();
+    int top = rect.GetTop();
+    int right = rect.GetRight();
+    int bottom = rect.GetBottom();
+
+    int leftCol = topLeft.GetCol();
+    int topRow = topLeft.GetRow();
+    int rightCol = bottomRight.GetCol();
+    int bottomRow = bottomRight.GetRow();
+
+    for ( j = topRow; j <= bottomRow; j++ )
+    {
+        for ( i = leftCol; i <= rightCol; i++ )
+        {
+            if ((j==topRow) || (j==bottomRow) || (i==leftCol) || (i==rightCol))
+            {
+                cellRect = CellToRect( j, i );
+
+                if (cellRect.x < left)
+                    left = cellRect.x;
+                if (cellRect.y < top)
+                    top = cellRect.y;
+                if (cellRect.x + cellRect.width > right)
+                    right = cellRect.x + cellRect.width;
+                if (cellRect.y + cellRect.height > bottom)
+                    bottom = cellRect.y + cellRect.height;
+            }
+        }
+    }
+
     // convert to scrolled coords
     //
-    int left, top, right, bottom;
-    CalcScrolledPosition( rect.GetLeft(), rect.GetTop(), &left, &top );
-    CalcScrolledPosition( rect.GetRight(), rect.GetBottom(), &right, &bottom );
+    CalcScrolledPosition( left, top, &left, &top );
+    CalcScrolledPosition( right, bottom, &right, &bottom );
 
     int cw, ch;
     m_gridWin->GetClientSize( &cw, &ch );
@@ -8994,4 +9535,3 @@ wxGridEditorCreatedEvent::wxGridEditorCreatedEvent(int id, wxEventType type,
 #endif // !wxUSE_NEW_GRID/wxUSE_NEW_GRID
 
 #endif // wxUSE_GRID
-