Bug 207268 Add visibility option for plot within axes
For chart with axes, we should make plot within axes invisible. Meantime, other plots, such as axes, legend and title, should be visible. This enhancement doesn't include UI change, and it is required for cross tab integration.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderer.java
{
					final StructureSource iSource = ( oParent instanceof Legend )
							? ( StructureSource.createSeries( se ) )
							: ( WrappedStructureSource.createSeriesDataPoint( se,
									dph ) );
					final InteractionEvent iev = (InteractionEvent) ( (EventObjectCache) ipr ).getEventObject( iSource,
							InteractionEvent.class );
					Trigger tg;
					for ( int t = 0; t < elTriggers.size( ); t++ )
					{
						tg = TriggerImpl.copyInstance( (Trigger) elTriggers.get( t ) );
						this.processTrigger( tg, iSource );
						iev.addTrigger( tg );
					}
					iev.setHotSpot( preCopy );
					ipr.enableInteraction( iev );
				}
			}
		}
	}
	/**
	 * Renders all marker lines (and labels at requested positions) associated
	 * with every axis in the plot Note that marker lines are drawn immediately
	 * (not rendered as deferred) at the appropriate Z-order
	 * 
	 * @param oaxa
	 * @param boPlotClientArea
	 * 
	 * @throws RenderingException
	 */