Bug 313297 XML data set fail in chart data preview
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/swt/CustomPreviewTable.java
{
							gc.setBackground( cSelectionBack );
							gc.setForeground( cSelectionFore );
						}
					}
					
					gc.setClipping( r );
				}
				
				if ( iC == ( cells.length - 1 ) )
				{
					
					gc.setForeground( cGrid );
					gc.drawLine( iXStart
							- columnWidthOffset
							+ getColumnWidthFor( iC ), 0, iXStart
							- columnWidthOffset
							+ getColumnWidthFor( iC ), this.getSize( ).y );
				}
			}
		}
		private Color getColorForColumn( int iIndex )
		{
			if ( colors != null )
			{
				return colors[iIndex];
			}
			return null;
		}
		public void mouseDoubleClick( MouseEvent e )