Bug 198031 Legend interactivity does not work correctly for drill-throughs
Under Value (Y) Series enable interactivity for the event "Mouse Click" Set action to Hyperlink The type of the hyperlink is Drill-through and the target is the a sub-report Pass parameter to sub-report as row["value_of_the_legend_item"] Suppose there are 3 values, x,y and z No matter which legend item you click (x, y or z), z gets passed as param to the subreport
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/TriggerDataComposite.java
this.getForeground( ),
							this.getBackground( ),
							SWT.ITALIC ),
					new StyleRange( 4,
							stParameters.getText( ).length( ) - 4,
							this.getForeground( ),
							this.getBackground( ),
							SWT.NORMAL )
			};
			stParameters.setStyleRanges( sr );
			stParameters.setBackground( this.getBackground( ) );
		}
		Label lblBaseParm = new Label( grpParameters, SWT.NONE );
		{
			GridData gdLBLBaseParm = new GridData( );
			gdLBLBaseParm.horizontalIndent = 2;
			lblBaseParm.setLayoutData( gdLBLBaseParm );
			lblBaseParm.setText( Messages.getString( "TriggerDataComposite.Lbl.CategorySeries" ) ); 
			lblBaseParm.setToolTipText( Messages.getString( "TriggerDataComposite.Tooltip.ParameterCategory" ) ); 
		}
		txtBaseParm = new Text( grpParameters, SWT.BORDER );
		GridData gdTXTBaseParm = new GridData( GridData.FILL_HORIZONTAL );
		gdTXTBaseParm.horizontalSpan = 2;
		txtBaseParm.setLayoutData( gdTXTBaseParm );
		txtBaseParm.setToolTipText( Messages.getString( "TriggerDataComposite.Tooltip.ParameterCategory" ) ); 
		Label lblValueParm = new Label( grpParameters, SWT.NONE );
		{
			GridData gdLBLValueParm = new GridData( );
			gdLBLValueParm.horizontalIndent = 2;
			lblValueParm.setLayoutData( gdLBLValueParm );