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
private final void renderMarkerLines( OneAxis[] oaxa,
			Bounds boPlotClientArea ) throws ChartException
	{
		Axis ax;
		EList el;
		int iLineCount, iAxisCount = oaxa.length;
		MarkerLine ml;
		LineRenderEvent lre;
		DataElement deValue;
		AutoScale asc;
		double dCoordinate = 0;
		int iOrientation;
		final IDeviceRenderer idr = getDevice( );
		final ScriptHandler sh = getRunTimeContext( ).getScriptHandler( );
		final Location loStart = LocationImpl.create( 0, 0 );
		final Location loEnd = LocationImpl.create( 0, 0 );
		Anchor anc;
		TextRenderEvent tre = null;
		Label la = null;
		double dOriginalAngle = 0;
		final boolean bTransposed = ( (ChartWithAxes) getModel( ) ).isTransposed( );
		final PlotWithAxes pwa = (PlotWithAxes) getComputations( );
		final Bounds boText = BoundsImpl.create( 0, 0, 0, 0 );
		for ( int i = 0; i < iAxisCount; i++ )
		{
			ax = oaxa[i].getModelAxis( );
			iOrientation = ax.getOrientation( ).getValue( );
			if ( bTransposed ) 
			{
				iOrientation = ( iOrientation == Orientation.HORIZONTAL )