Merge branch 'grid-clip'

See https://github.com/wxWidgets/wxWidgets/pull/648

src/generic/grid.cpp

@@ -1871,7 +1871,10 @@ void wxGrid::Render( wxDC& dc,
     dc.DrawRectangle( pointOffSet, sizeCells );
 
     // draw cells
-    DrawGridCellArea( dc, renderCells );
+    {
+        wxDCClipper clipper( dc, wxRect(pointOffSet, sizeCells) );
+        DrawGridCellArea( dc, renderCells );
+    }
 
     // draw grid lines
     if ( style & wxGRID_DRAW_CELL_LINES )

src/generic/gridctrl.cpp

@@ -630,8 +630,7 @@ void wxGridCellStringRenderer::Draw(wxGrid& grid,
             for (int i = col + cell_cols; i <= col_end; i++)
             {
                 clip.width = grid.GetColSize(i) - 1;
-                dc.DestroyClippingRegion();
-                dc.SetClippingRegion(clip);
+                wxDCClipper clipper(dc, clip);
 
                 SetTextColoursAndFont(grid, attr, dc,
                         grid.IsInSelection(row,i));
@@ -644,7 +643,6 @@ void wxGridCellStringRenderer::Draw(wxGrid& grid,
             rect = rectCell;
             rect.Inflate(-1);
             rect.width++;
-            dc.DestroyClippingRegion();
         }
     }