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
iHeight -= super.getHorizontalBar( ).getSize( ).y;
				iVisibleRows = (int) Math.floor( iHeight / (double) ROW_HEIGHT );
				getVerticalBar( ).setValues( iVisibleRows + iVScroll,
						iVisibleRows,
						iMaxRowIndex + 2,
						1,
						1,
						1 );
			}
			else
			{
				getHorizontalBar( ).setValues( iVisibleTableWidth,
						iVisibleTableWidth,
						iMaxTableWidth,
						SCROLL_HORIZONTAL_STEP,
						SCROLL_HORIZONTAL_STEP,
						SCROLL_HORIZONTAL_STEP );
				getVerticalBar( ).setValues( iMaxRowIndex,
						iMaxRowIndex,
						iMaxRowIndex,
						1,
						1,
						1 );
			}
			iLastProcessedHorizontalScrollPosition = iVisibleTableWidth
					+ iHiddenWidth;
			iLastProcessedVerticalScrollPosition = iVisibleRows + iVScroll;
		}
		private int getMaxTableWidth( )
		{