Bug 211773 Legend entries overlap
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
* 
	 * @param ipr
	 * @param dph
	 * @param pre
	 * @throws ChartException
	 */
	protected final void renderInteractivity( IPrimitiveRenderer ipr,
			DataPointHints dph, PrimitiveRenderEvent pre ) throws ChartException
	{
		if ( isInteractivityEnabled( ) && dph != null )
		{
			
			final EList elTriggers = getSeries( ).getTriggers( );
			if ( !elTriggers.isEmpty( ) )
			{
				final StructureSource iSource = WrappedStructureSource.createSeriesDataPoint( getSeries( ),
						dph );
				final InteractionEvent iev = createEvent( iSource,
						elTriggers,
						ipr );
				iev.setHotSpot( pre );
				ipr.enableInteraction( iev );
			}
		}
	}
	
	protected final boolean isFirstVisibleSeries( )
	{
		if ( iSeriesIndex == 0 )
		{