Bug 211773 Legend entries overlap
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
{
				final InteractionEvent iev = (InteractionEvent) ( (EventObjectCache) ipr ).getEventObject( StructureSource.createTitle( b ),
						InteractionEvent.class );
				for ( int t = 0; t < elTriggers.size( ); t++ )
				{
					tg = TriggerImpl.copyInstance( (Trigger) elTriggers.get( t ) );
					processTrigger( tg, StructureSource.createTitle( b ) );
					iev.addTrigger( tg );
				}
				final PolygonRenderEvent pre = (PolygonRenderEvent) ( (EventObjectCache) ipr ).getEventObject( StructureSource.createTitle( b ),
						PolygonRenderEvent.class );
				pre.setPoints( loaHotspot );
				iev.setHotSpot( pre );
				ipr.enableInteraction( iev );
			}
		}
	}
	/**
	 * Creates empty renderer instance.
	 * 
	 * @param cm
	 * @param oComputations
	 * @return
	 */
	private static final BaseRenderer[] createEmptyInstance( Chart cm,
			RunTimeContext rtc, Object oComputations )
	{
		final BaseRenderer[] brna = new BaseRenderer[1];
		final AxesRenderer ar = new EmptyWithAxes( );
		ar.iSeriesIndex = 0;