xyshaperenderer.java

jfreechart-1.0.12.zip 可以用来作图

    public void setGuideLinePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.guideLinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used to draw the guide lines.
     *
     * @return The stroke.
     *
     * @see #setGuideLineStroke(Stroke)
     */
    public Stroke getGuideLineStroke() {
        return this.guideLineStroke;
    }

    /**
     * Sets the stroke used to draw the guide lines and sends a
     * {@link RendererChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null</code> not permitted).
     *
     * @see #getGuideLineStroke()
     */
    public void setGuideLineStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.guideLineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the lower and upper bounds (range) of the x-values in the
     * specified dataset.
     *
     * @param dataset  the dataset (<code>null</code> permitted).
     *
     * @return The range (<code>null</code> if the dataset is <code>null</code>
     *         or empty).
     */
    public Range findDomainBounds(XYDataset dataset) {
        if (dataset != null) {
            Range r = DatasetUtilities.findDomainBounds(dataset, false);
            double offset = 0; // TODO getSeriesShape(n).getBounds().width / 2;
            return new Range(r.getLowerBound() + offset,
                             r.getUpperBound() + offset);
        }
        else {
            return null;
        }
    }

    /**
     * Returns the range of values the renderer requires to display all the
     * items from the specified dataset.
     *
     * @param dataset  the dataset (<code>null</code> permitted).
     *
     * @return The range (<code>null</code> if the dataset is <code>null</code>
     *         or empty).
     */
    public Range findRangeBounds(XYDataset dataset) {
        if (dataset != null) {
            Range r = DatasetUtilities.findRangeBounds(dataset, false);
            double offset = 0; // TODO getSeriesShape(n).getBounds().height / 2;
            return new Range(r.getLowerBound() + offset, r.getUpperBound()
                    + offset);
        }
        else {
            return null;
        }
    }

    /**
     * Returns the number of passes required by this renderer.
     *
     * @return <code>2</code>.
     */
    public int getPassCount() {
        return 2;
    }

    /**
     * Draws the block representing the specified item.
     *
     * @param g2  the graphics device.
     * @param state  the state.
     * @param dataArea  the data area.
     * @param info  the plot rendering info.
     * @param plot  the plot.
     * @param domainAxis  the x-axis.
     * @param rangeAxis  the y-axis.
     * @param dataset  the dataset.
     * @param series  the series index.
     * @param item  the item index.
     * @param crosshairState  the crosshair state.
     * @param pass  the pass index.
     */
    public void drawItem(Graphics2D g2, XYItemRendererState state,
            Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,
            ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,
            int series, int item, CrosshairState crosshairState, int pass) {

        Shape hotspot = null;
        EntityCollection entities = null;
        if (info != null) {
            entities = info.getOwner().getEntityCollection();
        }

        double x = dataset.getXValue(series, item);
        double y = dataset.getYValue(series, item);
        if (Double.isNaN(x) || Double.isNaN(y)) {
            // can't draw anything
            return;
        }

        double transX = domainAxis.valueToJava2D(x, dataArea,
                plot.getDomainAxisEdge());
        double transY = rangeAxis.valueToJava2D(y, dataArea,
                plot.getRangeAxisEdge());

        PlotOrientation orientation = plot.getOrientation();

        // draw optional guide lines
        if ((pass == 0) && this.guideLinesVisible) {
            g2.setStroke(this.guideLineStroke);
            g2.setPaint(this.guideLinePaint);
            if (orientation == PlotOrientation.HORIZONTAL) {
                g2.draw(new Line2D.Double(transY, dataArea.getMinY(), transY,
                        dataArea.getMaxY()));
                g2.draw(new Line2D.Double(dataArea.getMinX(), transX,
                        dataArea.getMaxX(), transX));
            }
            else {
                g2.draw(new Line2D.Double(transX, dataArea.getMinY(), transX,
                        dataArea.getMaxY()));
                g2.draw(new Line2D.Double(dataArea.getMinX(), transY,
                        dataArea.getMaxX(), transY));
            }
        }
        else if (pass == 1) {
            Shape shape = getItemShape(series, item);
            if (orientation == PlotOrientation.HORIZONTAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, transY,
                        transX);
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, transX,
                        transY);
            }
            hotspot = shape;
            if (shape.intersects(dataArea)) {
                //if (getItemShapeFilled(series, item)) {
                    g2.setPaint(getPaint(dataset, series, item));
                    g2.fill(shape);
               //}
                if (this.drawOutlines) {
                    if (getUseOutlinePaint()) {
                        g2.setPaint(getItemOutlinePaint(series, item));
                    }
                    else {
                        g2.setPaint(getItemPaint(series, item));
                    }
                    g2.setStroke(getItemOutlineStroke(series, item));
                    g2.draw(shape);
                }
            }

            // add an entity for the item...
            if (entities != null) {
                addEntity(entities, hotspot, dataset, series, item, transX,
                        transY);
            }
        }
    }

    /**
     * Get the paint for a given series and item from a dataset.
     *
     * @param dataset  the dataset..
     * @param series  the series index.
     * @param item  the item index.
     *
     * @return The paint.
     */
    protected Paint getPaint(XYDataset dataset, int series, int item) {
        Paint p = null;
        if (dataset instanceof XYZDataset) {
            double z = ((XYZDataset) dataset).getZValue(series, item);
            p = this.paintScale.getPaint(z);
        }
        else {
            if (this.useFillPaint) {
                p = getItemFillPaint(series, item);
            }
            else {
                p = getItemPaint(series, item);
            }
        }
        return p;
    }

    /**
     * Tests this instance for equality with an arbitrary object.  This method
     * returns <code>true</code> if and only if:
     * <ul>
     * <li><code>obj</code> is an instance of <code>XYShapeRenderer</code> (not
     *     <code>null</code>);</li>
     * <li><code>obj</code> has the same field values as this
     *     <code>XYShapeRenderer</code>;</li>
     * </ul>
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof XYShapeRenderer)) {
            return false;
        }
        XYShapeRenderer that = (XYShapeRenderer) obj;
        if ((this.paintScale == null && that.paintScale != null)
                || (!this.paintScale.equals(that.paintScale))) {
            return false;
        }
        if (this.drawOutlines != that.drawOutlines) {
            return false;
        }
        if (this.useOutlinePaint != that.useOutlinePaint) {
            return false;
        }
        if (this.useFillPaint != that.useFillPaint) {
            return false;
        }
        if (this.guideLinesVisible != that.guideLinesVisible) {
            return false;
        }
        if ((this.guideLinePaint == null && that.guideLinePaint != null)
                || (!this.guideLinePaint.equals(that.guideLinePaint)))
            return false;
        if ((this.guideLineStroke == null && that.guideLineStroke != null)
                || (!this.guideLineStroke.equals(that.guideLineStroke)))
            return false;

        return super.equals(obj);
    }

    /**
     * Returns a clone of this renderer.
     *
     * @return A clone of this renderer.
     *
     * @throws CloneNotSupportedException if there is a problem creating the
     *     clone.
     */
    public Object clone() throws CloneNotSupportedException {
        XYShapeRenderer clone = (XYShapeRenderer) super.clone();
        if (this.paintScale instanceof PublicCloneable) {
            PublicCloneable pc = (PublicCloneable) this.paintScale;
            clone.paintScale = (PaintScale) pc.clone();
        }
        return clone;
    }

    /**
     * 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.guideLinePaint = SerialUtilities.readPaint(stream);
        this.guideLineStroke = SerialUtilities.readStroke(stream);
    }

    /**
     * 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.guideLinePaint, stream);
        SerialUtilities.writeStroke(this.guideLineStroke, stream);
    }

}