Bug 145144 SVG Interactivity cannot highlight gradient colors
Create any SVG Chart with gradient colors on the series palette. Add interactivity on series to highlight them on mouseover for instance (or mouse click) The highlight doesn't work. It works for plain colors only.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGGraphics2D.java
double startY = y * Math.sin( startAngle );
		double endX = x * Math.cos( startAngle + arcAngle );
		double endY = y * Math.sin( startAngle + arcAngle );
		int sweepFlag = ( arcAngle < 0 ) ? 0 : 1;
		elem.setAttribute( "d", "M" + startX + "," + startY + " a" + width / 2 + "," + height / 2 + " " + Math.abs( arcAngle ) + " 0 " + sweepFlag + " " + endX + " " + endY ); 
		return elem;
	}
	public Element createPolyline( int[] arg0, int[] arg1, int arg2 )
	{
		Element elem = createElement( "polyline" ); 
		StringBuffer pointsStr = new StringBuffer( );
		;
		for ( int x = 0; x < arg2; x++ )
		{
			pointsStr.append( arg0[x] )
					.append( "," ).append( arg1[x] ).append( " " ); 
		}
		elem.setAttribute( "points", pointsStr.toString( ) ); 
		return elem;
	}
	public Element createPolygon( int[] arg0, int[] arg1, int arg2 )
	{
		Element elem = createElement( "polygon" ); 
		StringBuffer pointsStr = new StringBuffer( );
		;
		for ( int x = 0; x < arg2; x++ )
		{
			pointsStr.append( arg0[x] )
					.append( "," ).append( arg1[x] ).append( " " ); 
		}