categorypointerannotation.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

     * 
     * @see #getArrowLength()
     */
    public void setArrowLength(double length) {
        this.arrowLength = length;
    }

    /**
     * Returns the arrow width.
     * 
     * @return The arrow width (in Java2D units).
     * 
     * @see #setArrowWidth(double)
     */
    public double getArrowWidth() {
        return this.arrowWidth;
    }
    
    /**
     * Sets the arrow width.
     * 
     * @param width  the width (in Java2D units).
     * 
     * @see #getArrowWidth()
     */
    public void setArrowWidth(double width) {
        this.arrowWidth = width;
    }
    
    /** 
     * Returns the stroke used to draw the arrow line.
     * 
     * @return The arrow stroke (never <code>null</code>).
     * 
     * @see #setArrowStroke(Stroke)
     */
    public Stroke getArrowStroke() {
        return this.arrowStroke;
    }

    /** 
     * Sets the stroke used to draw the arrow line.
     * 
     * @param stroke  the stroke (<code>null</code> not permitted).
     * 
     * @see #getArrowStroke()
     */
    public void setArrowStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' not permitted.");
        }
        this.arrowStroke = stroke;
    }
    
    /**
     * Returns the paint used for the arrow.
     * 
     * @return The arrow paint (never <code>null</code>).
     * 
     * @see #setArrowPaint(Paint)
     */
    public Paint getArrowPaint() {
        return this.arrowPaint;
    }
    
    /**
     * Sets the paint used for the arrow.
     * 
     * @param paint  the arrow paint (<code>null</code> not permitted).
     * 
     * @see #getArrowPaint()
     */
    public void setArrowPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.arrowPaint = paint;
    }
    
    /**
     * Draws the annotation.
     *
     * @param g2  the graphics device.
     * @param plot  the plot.
     * @param dataArea  the data area.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     */
    public void draw(Graphics2D g2, CategoryPlot plot, Rectangle2D dataArea,
            CategoryAxis domainAxis, ValueAxis rangeAxis) {

        PlotOrientation orientation = plot.getOrientation();
        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
                plot.getDomainAxisLocation(), orientation);
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
                plot.getRangeAxisLocation(), orientation);
        CategoryDataset dataset = plot.getDataset();
        int catIndex = dataset.getColumnIndex(getCategory());
        int catCount = dataset.getColumnCount();
        double j2DX = domainAxis.getCategoryMiddle(catIndex, catCount, 
                dataArea, domainEdge);
        double j2DY = rangeAxis.valueToJava2D(getValue(), dataArea, rangeEdge);
        if (orientation == PlotOrientation.HORIZONTAL) {
            double temp = j2DX;
            j2DX = j2DY;
            j2DY = temp;
        }
        double startX = j2DX + Math.cos(this.angle) * this.baseRadius;
        double startY = j2DY + Math.sin(this.angle) * this.baseRadius;

        double endX = j2DX + Math.cos(this.angle) * this.tipRadius;
        double endY = j2DY + Math.sin(this.angle) * this.tipRadius;

        double arrowBaseX = endX + Math.cos(this.angle) * this.arrowLength;
        double arrowBaseY = endY + Math.sin(this.angle) * this.arrowLength;

        double arrowLeftX = arrowBaseX 
            + Math.cos(this.angle + Math.PI / 2.0) * this.arrowWidth;
        double arrowLeftY = arrowBaseY 
            + Math.sin(this.angle + Math.PI / 2.0) * this.arrowWidth;

        double arrowRightX = arrowBaseX 
            - Math.cos(this.angle + Math.PI / 2.0) * this.arrowWidth;
        double arrowRightY = arrowBaseY 
            - Math.sin(this.angle + Math.PI / 2.0) * this.arrowWidth;

        GeneralPath arrow = new GeneralPath();
        arrow.moveTo((float) endX, (float) endY);
        arrow.lineTo((float) arrowLeftX, (float) arrowLeftY);
        arrow.lineTo((float) arrowRightX, (float) arrowRightY);
        arrow.closePath();

        g2.setStroke(this.arrowStroke);
        g2.setPaint(this.arrowPaint);
        Line2D line = new Line2D.Double(startX, startY, endX, endY);
        g2.draw(line);
        g2.fill(arrow);

        // draw the label
        g2.setFont(getFont());
        g2.setPaint(getPaint());
        double labelX = j2DX 
            + Math.cos(this.angle) * (this.baseRadius + this.labelOffset);
        double labelY = j2DY 
            + Math.sin(this.angle) * (this.baseRadius + this.labelOffset);
        /* Rectangle2D hotspot = */ TextUtilities.drawAlignedString(getText(), 
                g2, (float) labelX, (float) labelY, getTextAnchor());
        // TODO: implement the entity for the annotation
        
    }
    
    /**
     * Tests this annotation for equality with an arbitrary object.
     * 
     * @param obj  the object (<code>null</code> permitted).
     * 
     * @return <code>true</code> or <code>false</code>.
     */
    public boolean equals(Object obj) {
        
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CategoryPointerAnnotation)) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        CategoryPointerAnnotation that = (CategoryPointerAnnotation) obj;
        if (this.angle != that.angle) {
            return false;
        }
        if (this.tipRadius != that.tipRadius) {
            return false;
        }
        if (this.baseRadius != that.baseRadius) {
            return false;
        }
        if (this.arrowLength != that.arrowLength) {
            return false;
        }
        if (this.arrowWidth != that.arrowWidth) {
            return false;
        }
        if (!this.arrowPaint.equals(that.arrowPaint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.arrowStroke, that.arrowStroke)) {
            return false;
        }
        if (this.labelOffset != that.labelOffset) {
            return false;
        }
        return true;
    }
    
    /**
     * Returns a hash code for this instance.
     * 
     * @return A hash code.
     */
    public int hashCode() {
        int result = 193;
        long temp = Double.doubleToLongBits(this.angle);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(this.tipRadius);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(this.baseRadius);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(this.arrowLength);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(this.arrowWidth);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        result = 37 * result + HashUtilities.hashCodeForPaint(this.arrowPaint);
        result = 37 * result + this.arrowStroke.hashCode();
        temp = Double.doubleToLongBits(this.labelOffset);
        result = 37 * result + (int) (temp ^ (temp >>> 32));
        return result;
    }
    
    /**
     * Returns a clone of the annotation.
     * 
     * @return A clone.
     * 
     * @throws CloneNotSupportedException  if the annotation can't be cloned.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.arrowPaint, stream);
        SerialUtilities.writeStroke(this.arrowStroke, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream) 
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.arrowPaint = SerialUtilities.readPaint(stream);
        this.arrowStroke = SerialUtilities.readStroke(stream);
    }

}