regsvggen/xml/GradientPaint.xml

<test title="GradientPaint Testing">
	<description>
		This test validates the convertion of Java 2D GradientPaints
		into SVG linearGradient definition and reference.
	</description>
	<description>
		The test validates that a GradientPaint is properly converted
		with regards to its color values (including opacity), its
		start and end points, its cycling strategy and its behavior
		under transformation.
	</description>
	<javaCode>
		<![CDATA[
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 
                       RenderingHints.VALUE_ANTIALIAS_ON);

		AffineTransform defaultTransform = g.getTransform();
		Color labelColor = Color.black;

		// 
		// First, define cross hair marker
		// 
		GeneralPath crossHair = new GeneralPath();
		crossHair.moveTo(-5, 0);
		crossHair.lineTo(5, 0);		
		crossHair.moveTo(0, -5);
		crossHair.lineTo(0, 5);

		//
		// Simple test checking color values and start
		// and end points
		//
		GradientPaint gradient = new GradientPaint(30, 40, Color.red,
																							 30, 120, Color.yellow);
		g.setPaint(labelColor);
		g.drawString("Simple vertical gradient", 10, 20);
		g.setPaint(gradient);
		g.fillRect(10, 30, 100, 100);
		g.setPaint(labelColor);
		g.translate(30, 40);
		g.draw(crossHair);
		g.setTransform(defaultTransform);
		g.translate(30, 120);
		g.draw(crossHair);

		g.setTransform(defaultTransform);
		g.translate(0, 140);

		//
		// Now, test cycling behavior
		//
		GradientPaint nonCyclicGradient = new GradientPaint(0, 0, Color.red,
																												20, 0, Color.yellow);
		GradientPaint cyclicGradient = new GradientPaint(0, 0, Color.red,
																										 20, 0, Color.yellow, true);

		g.setPaint(labelColor);
		g.drawString("Non Cyclic / Cyclic Gradients", 10, 20);
		
		g.translate(10, 30);

		g.setPaint(nonCyclicGradient);
		g.fillRect(0, 0, 100, 30);
		
		g.translate(0, 30);
		g.setPaint(cyclicGradient);
		g.fillRect(0, 0, 100, 30);

		g.setPaint(labelColor);
		g.drawLine(0, 0, 100, 0);

		g.setTransform(defaultTransform);
		g.translate(0, 240);

		//
		// Now, test transformations
		//
		g.setPaint(labelColor);
		g.drawString("Sheared GradientPaint", 10, 20);
		g.translate(10, 25);

		GradientPaint shearedGradient = new GradientPaint(0, 0, Color.red,
																											100, 0, Color.yellow);
		g.setPaint(shearedGradient);
		g.shear(0.5, 0);
		
		g.fillRect(0, 0, 100, 40);

		g.setTransform(defaultTransform);
		g.translate(0, 320);

		g.setPaint(labelColor);
		g.drawString("Opacity in stop color", 10, 20);
		
		GradientPaint transparentGradient = new GradientPaint(10, 30, new Color(255, 0, 0, 0),
																													110, 30, Color.yellow);

		g.setPaint(transparentGradient);
		g.fillRect(10, 30, 100, 30);

    ]]>
  </javaCode>
</test>