Bug 211773 Legend entries overlap
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getBaseParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getBaseDisplayValue( ) ) );
				}
				if ( uv.getValueParameterName( ) != null
						&& uv.getValueParameterName( ).length( ) > 0 )
				{
					sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getValueParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getOrthogonalDisplayValue( ) ) );
				}
				if ( uv.getSeriesParameterName( ) != null
						&& uv.getSeriesParameterName( ).length( ) > 0 )
				{
					sb.append( c );
					c = '&';
					sb.append( URLValueImpl.encode( uv.getSeriesParameterName( ) ) );
					sb.append( '=' );
					sb.append( URLValueImpl.encode( dph.getSeriesDisplayValue( ) ) );
				}
				uv.setBaseUrl( sb.toString( ) );
			}
		}
	}
	/**
	 * @return Returns the current cell bounds associated with current series.