Examples of org.jfree.chart.annotations.CategoryPointerAnnotation

org.jfree.chart.annotations.CategoryPointerAnnotation
An arrow and label that can be placed on a {@link CategoryPlot}. The arrow is drawn at a user-definable angle so that it points towards the (category, value) location for the annotation.
The arrow length (and its offset from the (category, value) location) is controlled by the tip radius and the base radius attributes. Imagine two circles around the (category, value) coordinate: the inner circle defined by the tip radius, and the outer circle defined by the base radius. Now, draw the arrow starting at some point on the outer circle (the point is determined by the angle), with the arrow tip being drawn at a corresponding point on the inner circle. @since 1.0.3

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        
        CategoryPointerAnnotation a1 = new CategoryPointerAnnotation("Label", 
                "Key 1", 20.0, Math.PI);
        CategoryPointerAnnotation a2 = new CategoryPointerAnnotation("Label", 
                "Key 1", 20.0, Math.PI);
        assertTrue(a1.equals(a2));
        
        a1 = new CategoryPointerAnnotation("Label2", "Key 1", 20.0, Math.PI);
        assertFalse(a1.equals(a2));
        a2 = new CategoryPointerAnnotation("Label2", "Key 1", 20.0, Math.PI);
        assertTrue(a1.equals(a2));
        
        a1.setCategory("Key 2");
        assertFalse(a1.equals(a2));
        a2.setCategory("Key 2");
        assertTrue(a1.equals(a2));
        
        a1.setValue(22.0);
        assertFalse(a1.equals(a2));
        a2.setValue(22.0);
        assertTrue(a1.equals(a2));
        
        //private double angle;
        a1.setAngle(Math.PI / 4.0);
        assertFalse(a1.equals(a2));
        a2.setAngle(Math.PI / 4.0);
        assertTrue(a1.equals(a2));
        
        //private double tipRadius;
        a1.setTipRadius(20.0);
        assertFalse(a1.equals(a2));
        a2.setTipRadius(20.0);
        assertTrue(a1.equals(a2));


        //private double baseRadius;
        a1.setBaseRadius(5.0);
        assertFalse(a1.equals(a2));
        a2.setBaseRadius(5.0);
        assertTrue(a1.equals(a2));
        
        //private double arrowLength;
        a1.setArrowLength(33.0);
        assertFalse(a1.equals(a2));
        a2.setArrowLength(33.0);
        assertTrue(a1.equals(a2));
        
        //private double arrowWidth;
        a1.setArrowWidth(9.0);
        assertFalse(a1.equals(a2));
        a2.setArrowWidth(9.0);
        assertTrue(a1.equals(a2));
        
        //private Stroke arrowStroke;
        Stroke stroke = new BasicStroke(1.5f);
        a1.setArrowStroke(stroke);
        assertFalse(a1.equals(a2));
        a2.setArrowStroke(stroke);
        assertTrue(a1.equals(a2));
        
        //private Paint arrowPaint;
        a1.setArrowPaint(Color.blue);
        assertFalse(a1.equals(a2));
        a2.setArrowPaint(Color.blue);
        assertTrue(a1.equals(a2));


        //private double labelOffset;
        a1.setLabelOffset(10.0);
        assertFalse(a1.equals(a2));
        a2.setLabelOffset(10.0);
        assertTrue(a1.equals(a2));
      
    }

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    /**
     * Two objects that are equal are required to return the same hashCode. 
     */
    public void testHashCode() {
        CategoryPointerAnnotation a1 = new CategoryPointerAnnotation("Label", 
                "A", 20.0, Math.PI);
        CategoryPointerAnnotation a2 = new CategoryPointerAnnotation("Label", 
                "A", 20.0, Math.PI);
        assertTrue(a1.equals(a2));
        int h1 = a1.hashCode();
        int h2 = a2.hashCode();
        assertEquals(h1, h2);
    }

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    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        CategoryPointerAnnotation a1 = new CategoryPointerAnnotation("Label", 
                "A", 20.0, Math.PI);
        CategoryPointerAnnotation a2 = null;
        try {
            a2 = (CategoryPointerAnnotation) a1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(a1 != a2);
        assertTrue(a1.getClass() == a2.getClass());
        assertTrue(a1.equals(a2));
    }

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    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {


        CategoryPointerAnnotation a1 = new CategoryPointerAnnotation("Label", 
                "A", 20.0, Math.PI);
        CategoryPointerAnnotation a2 = null;


        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(a1);

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