+
+// ----------------------------------------------------------------------------
+// wxGridCellStringRenderer
+// ----------------------------------------------------------------------------
+
+void wxGridCellStringRenderer::SetTextColoursAndFont(const wxGrid& grid,
+                                                     const wxGridCellAttr& attr,
+                                                     wxDC& dc,
+                                                     bool isSelected)
+{
+    dc.SetBackgroundMode( wxBRUSHSTYLE_TRANSPARENT );
+
+    // TODO some special colours for attr.IsReadOnly() case?
+
+    // different coloured text when the grid is disabled
+    if ( grid.IsThisEnabled() )
+    {
+        if ( isSelected )
+        {
+            wxColour clr;
+            if ( grid.HasFocus() )
+                clr = grid.GetSelectionBackground();
+            else
+                clr = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNSHADOW);
+            dc.SetTextBackground( clr );
+            dc.SetTextForeground( grid.GetSelectionForeground() );
+        }
+        else
+        {
+            dc.SetTextBackground( attr.GetBackgroundColour() );
+            dc.SetTextForeground( attr.GetTextColour() );
+        }
+    }
+    else
+    {
+        dc.SetTextBackground(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));
+        dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT));
+    }
+
+    dc.SetFont( attr.GetFont() );
+}
+
+wxSize wxGridCellStringRenderer::DoGetBestSize(const wxGridCellAttr& attr,
+                                               wxDC& dc,
+                                               const wxString& text)
+{
+    wxCoord x = 0, y = 0, max_x = 0;
+    dc.SetFont(attr.GetFont());
+    wxStringTokenizer tk(text, wxT('\n'));
+    while ( tk.HasMoreTokens() )
+    {
+        dc.GetTextExtent(tk.GetNextToken(), &x, &y);
+        max_x = wxMax(max_x, x);
+    }
+
+    y *= 1 + text.Freq(wxT('\n')); // multiply by the number of lines.
+
+    return wxSize(max_x, y);
+}
+
+wxSize wxGridCellStringRenderer::GetBestSize(wxGrid& grid,
+                                             wxGridCellAttr& attr,
+                                             wxDC& dc,
+                                             int row, int col)
+{
+    return DoGetBestSize(attr, dc, grid.GetCellValue(row, col));
+}
+
+void wxGridCellStringRenderer::Draw(wxGrid& grid,
+                                    wxGridCellAttr& attr,
+                                    wxDC& dc,
+                                    const wxRect& rectCell,
+                                    int row, int col,
+                                    bool isSelected)
+{
+    wxRect rect = rectCell;
+    rect.Inflate(-1);
+
+    // erase only this cells background, overflow cells should have been erased
+    wxGridCellRenderer::Draw(grid, attr, dc, rectCell, row, col, isSelected);
+
+    int hAlign, vAlign;
+    attr.GetAlignment(&hAlign, &vAlign);
+
+    int overflowCols = 0;
+
+    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++)
+            {
+                bool is_empty = true;
+                for (int j=row; j < row + cell_rows; j++)
+                {
+                    // check w/ anchor cell for multicell block
+                    grid.GetCellSize(j, i, &c_rows, &c_cols);
+                    if (c_rows > 0)
+                        c_rows = 0;
+                    if (!grid.GetTable()->IsEmptyCell(j + c_rows, i))
+                    {
+                        is_empty = false;
+                        break;
+                    }
+                }
+
+                if (is_empty)
+                {
+                    rect.width += grid.GetColSize(i);
+                }
+                else
+                {
+                    i--;
+                    break;
+                }
+
+                if (rect.width >= best_width)
+                    break;
+            }
+
+            overflowCols = i - col - cell_cols + 1;
+            if (overflowCols >= cols)
+                overflowCols = cols - 1;
+        }
+
+        if (overflowCols > 0) // redraw overflow cells w/ proper hilight
+        {
+            hAlign = wxALIGN_LEFT; // if oveflowed then it's left aligned
+            wxRect clip = rect;
+            clip.x += rectCell.width;
+            // draw each overflow cell individually
+            int col_end = col + cell_cols + overflowCols;
+            if (col_end >= grid.GetNumberCols())
+                col_end = grid.GetNumberCols() - 1;
+            for (int i = col + cell_cols; i <= col_end; i++)
+            {
+                clip.width = grid.GetColSize(i) - 1;
+                dc.DestroyClippingRegion();
+                dc.SetClippingRegion(clip);
+
+                SetTextColoursAndFont(grid, attr, dc,
+                        grid.IsInSelection(row,i));
+
+                grid.DrawTextRectangle(dc, grid.GetCellValue(row, col),
+                        rect, hAlign, vAlign);
+                clip.x += grid.GetColSize(i) - 1;
+            }
+
+            rect = rectCell;
+            rect.Inflate(-1);
+            rect.width++;
+            dc.DestroyClippingRegion();
+        }
+    }
+
+    // now we only have to draw the text
+    SetTextColoursAndFont(grid, attr, dc, isSelected);
+
+    grid.DrawTextRectangle(dc, grid.GetCellValue(row, col),
+                           rect, hAlign, vAlign);
+}
+
+// ----------------------------------------------------------------------------
+// wxGridCellNumberRenderer
+// ----------------------------------------------------------------------------
+
+wxString wxGridCellNumberRenderer::GetString(const wxGrid& grid, int row, int col)
+{
+    wxGridTableBase *table = grid.GetTable();
+    wxString text;
+    if ( table->CanGetValueAs(row, col, wxGRID_VALUE_NUMBER) )
+    {
+        text.Printf(wxT("%ld"), table->GetValueAsLong(row, col));
+    }
+    else
+    {
+        text = table->GetValue(row, col);
+    }
+
+    return text;
+}
+
+void wxGridCellNumberRenderer::Draw(wxGrid& grid,
+                                    wxGridCellAttr& attr,
+                                    wxDC& dc,
+                                    const wxRect& rectCell,
+                                    int row, int col,
+                                    bool isSelected)
+{
+    wxGridCellRenderer::Draw(grid, attr, dc, rectCell, row, col, isSelected);
+
+    SetTextColoursAndFont(grid, attr, dc, isSelected);
+
+    // draw the text right aligned by default
+    int hAlign = wxALIGN_RIGHT,
+        vAlign = wxALIGN_INVALID;
+    attr.GetNonDefaultAlignment(&hAlign, &vAlign);
+
+    wxRect rect = rectCell;
+    rect.Inflate(-1);
+
+    grid.DrawTextRectangle(dc, GetString(grid, row, col), rect, hAlign, vAlign);
+}
+
+wxSize wxGridCellNumberRenderer::GetBestSize(wxGrid& grid,
+                                             wxGridCellAttr& attr,
+                                             wxDC& dc,
+                                             int row, int col)
+{
+    return DoGetBestSize(attr, dc, GetString(grid, row, col));
+}
+
+// ----------------------------------------------------------------------------
+// wxGridCellFloatRenderer
+// ----------------------------------------------------------------------------
+
+wxGridCellFloatRenderer::wxGridCellFloatRenderer(int width, int precision)
+{
+    SetWidth(width);
+    SetPrecision(precision);
+}
+
+wxGridCellRenderer *wxGridCellFloatRenderer::Clone() const
+{
+    wxGridCellFloatRenderer *renderer = new wxGridCellFloatRenderer;
+    renderer->m_width = m_width;
+    renderer->m_precision = m_precision;
+    renderer->m_format = m_format;
+
+    return renderer;
+}
+
+wxString wxGridCellFloatRenderer::GetString(const wxGrid& grid, int row, int col)
+{
+    wxGridTableBase *table = grid.GetTable();
+
+    bool hasDouble;
+    double val;
+    wxString text;
+    if ( table->CanGetValueAs(row, col, wxGRID_VALUE_FLOAT) )
+    {
+        val = table->GetValueAsDouble(row, col);
+        hasDouble = true;
+    }
+    else
+    {
+        text = table->GetValue(row, col);
+        hasDouble = text.ToDouble(&val);
+    }
+
+    if ( hasDouble )
+    {
+        if ( !m_format )
+        {
+            if ( m_width == -1 )
+            {
+                if ( m_precision == -1 )
+                {
+                    // default width/precision
+                    m_format = wxT("%f");
+                }
+                else
+                {
+                    m_format.Printf(wxT("%%.%df"), m_precision);
+                }
+            }
+            else if ( m_precision == -1 )
+            {
+                // default precision
+                m_format.Printf(wxT("%%%d.f"), m_width);
+            }
+            else
+            {
+                m_format.Printf(wxT("%%%d.%df"), m_width, m_precision);
+            }
+        }
+
+        text.Printf(m_format, val);
+
+    }
+    //else: text already contains the string
+
+    return text;
+}
+
+void wxGridCellFloatRenderer::Draw(wxGrid& grid,
+                                   wxGridCellAttr& attr,
+                                   wxDC& dc,
+                                   const wxRect& rectCell,
+                                   int row, int col,
+                                   bool isSelected)
+{
+    wxGridCellRenderer::Draw(grid, attr, dc, rectCell, row, col, isSelected);
+
+    SetTextColoursAndFont(grid, attr, dc, isSelected);
+
+    // draw the text right aligned by default
+    int hAlign = wxALIGN_RIGHT,
+        vAlign = wxALIGN_INVALID;
+    attr.GetNonDefaultAlignment(&hAlign, &vAlign);
+
+    wxRect rect = rectCell;
+    rect.Inflate(-1);
+
+    grid.DrawTextRectangle(dc, GetString(grid, row, col), rect, hAlign, vAlign);
+}
+
+wxSize wxGridCellFloatRenderer::GetBestSize(wxGrid& grid,
+                                            wxGridCellAttr& attr,
+                                            wxDC& dc,
+                                            int row, int col)
+{
+    return DoGetBestSize(attr, dc, GetString(grid, row, col));
+}
+
+void wxGridCellFloatRenderer::SetParameters(const wxString& params)
+{
+    if ( !params )
+    {
+        // reset to defaults
+        SetWidth(-1);
+        SetPrecision(-1);
+    }
+    else
+    {
+        wxString tmp = params.BeforeFirst(wxT(','));
+        if ( !tmp.empty() )
+        {
+            long width;
+            if ( tmp.ToLong(&width) )
+            {
+                SetWidth((int)width);
+            }
+            else
+            {
+                wxLogDebug(wxT("Invalid wxGridCellFloatRenderer width parameter string '%s ignored"), params.c_str());
+            }
+        }
+
+        tmp = params.AfterFirst(wxT(','));
+        if ( !tmp.empty() )
+        {
+            long precision;
+            if ( tmp.ToLong(&precision) )
+            {
+                SetPrecision((int)precision);
+            }
+            else
+            {
+                wxLogDebug(wxT("Invalid wxGridCellFloatRenderer precision parameter string '%s ignored"), params.c_str());
+            }
+        }
+    }
+}
+
+// ----------------------------------------------------------------------------
+// wxGridCellBoolRenderer
+// ----------------------------------------------------------------------------
+
+wxSize wxGridCellBoolRenderer::ms_sizeCheckMark;
+
+wxSize wxGridCellBoolRenderer::GetBestSize(wxGrid& grid,
+                                           wxGridCellAttr& WXUNUSED(attr),
+                                           wxDC& WXUNUSED(dc),
+                                           int WXUNUSED(row),
+                                           int WXUNUSED(col))
+{
+    // compute it only once (no locks for MT safeness in GUI thread...)
+    if ( !ms_sizeCheckMark.x )
+    {
+        ms_sizeCheckMark = wxRendererNative::Get().GetCheckBoxSize(&grid);
+    }
+
+    return ms_sizeCheckMark;
+}
+
+void wxGridCellBoolRenderer::Draw(wxGrid& grid,
+                                  wxGridCellAttr& attr,
+                                  wxDC& dc,
+                                  const wxRect& rect,
+                                  int row, int col,
+                                  bool isSelected)
+{
+    wxGridCellRenderer::Draw(grid, attr, dc, rect, row, col, isSelected);
+
+    // draw a check mark in the centre (ignoring alignment - TODO)
+    wxSize size = GetBestSize(grid, attr, dc, row, col);
+
+    // don't draw outside the cell
+    wxCoord minSize = wxMin(rect.width, rect.height);
+    if ( size.x >= minSize || size.y >= minSize )
+    {
+        // and even leave (at least) 1 pixel margin
+        size.x = size.y = minSize;
+    }
+
+    // draw a border around checkmark
+    int vAlign, hAlign;
+    attr.GetAlignment(&hAlign, &vAlign);
+
+    wxRect rectBorder;
+    if (hAlign == wxALIGN_CENTRE)
+    {
+        rectBorder.x = rect.x + rect.width / 2 - size.x / 2;
+        rectBorder.y = rect.y + rect.height / 2 - size.y / 2;
+        rectBorder.width = size.x;
+        rectBorder.height = size.y;
+    }
+    else if (hAlign == wxALIGN_LEFT)
+    {
+        rectBorder.x = rect.x + 2;
+        rectBorder.y = rect.y + rect.height / 2 - size.y / 2;
+        rectBorder.width = size.x;
+        rectBorder.height = size.y;
+    }
+    else if (hAlign == wxALIGN_RIGHT)
+    {
+        rectBorder.x = rect.x + rect.width - size.x - 2;
+        rectBorder.y = rect.y + rect.height / 2 - size.y / 2;
+        rectBorder.width = size.x;
+        rectBorder.height = size.y;
+    }
+
+    bool value;
+    if ( grid.GetTable()->CanGetValueAs(row, col, wxGRID_VALUE_BOOL) )
+    {
+        value = grid.GetTable()->GetValueAsBool(row, col);
+    }
+    else
+    {
+        wxString cellval( grid.GetTable()->GetValue(row, col) );
+        value = wxGridCellBoolEditor::IsTrueValue(cellval);
+    }
+
+    int flags = 0;
+    if (value)
+        flags |= wxCONTROL_CHECKED;
+
+    wxRendererNative::Get().DrawCheckBox( &grid, dc, rectBorder, flags );
+}
+
+#endif // wxUSE_GRID
+