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
if ( iC > 0 )
				{
					iXStart += getColumnWidthFor( iC - 1 );
				}
				iXEnd += getColumnWidthFor( iC );
				
				
				if ( ( iXEnd - columnWidthOffset ) < 0
						|| ( iXStart - columnWidthOffset ) > this.getSize( ).x )
				{
					continue;
				}
				
				
				
				
				
				
				
				Color cBack = getColorForColumn( iC );
				if ( cBack == null )
				{
					cBack = cDefaultBack;
				}
				gc.setBackground( cBack );
				
				gc.fillRectangle( iXStart - columnWidthOffset,
						0,
						getColumnWidthFor( iC ),