combinedrangecategoryplot.java

jfreechart-1.0.12.zip 可以用来作图

        double x = adjustedPlotArea.getX();
        double y = adjustedPlotArea.getY();
        double usableSize = 0.0;
        if (orientation == PlotOrientation.VERTICAL) {
            usableSize = adjustedPlotArea.getWidth() - this.gap * (n - 1);
        }
        else if (orientation == PlotOrientation.HORIZONTAL) {
            usableSize = adjustedPlotArea.getHeight() - this.gap * (n - 1);
        }

        for (int i = 0; i < n; i++) {
            CategoryPlot plot = (CategoryPlot) this.subplots.get(i);

            // calculate sub-plot area
            if (orientation == PlotOrientation.VERTICAL) {
                double w = usableSize * plot.getWeight() / totalWeight;
                this.subplotArea[i] = new Rectangle2D.Double(x, y, w,
                        adjustedPlotArea.getHeight());
                x = x + w + this.gap;
            }
            else if (orientation == PlotOrientation.HORIZONTAL) {
                double h = usableSize * plot.getWeight() / totalWeight;
                this.subplotArea[i] = new Rectangle2D.Double(x, y,
                        adjustedPlotArea.getWidth(), h);
                y = y + h + this.gap;
            }

            AxisSpace subSpace = plot.calculateDomainAxisSpace(g2,
                    this.subplotArea[i], null);
            space.ensureAtLeast(subSpace);

        }

        return space;
    }

    /**
     * Draws the plot on a Java 2D graphics device (such as the screen or a
     * printer).  Will perform all the placement calculations for each
     * sub-plots and then tell these to draw themselves.
     *
     * @param g2  the graphics device.
     * @param area  the area within which the plot (including axis labels)
     *              should be drawn.
     * @param anchor  the anchor point (<code>null</code> permitted).
     * @param parentState  the parent state.
     * @param info  collects information about the drawing (<code>null</code>
     *              permitted).
     */
    public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
                     PlotState parentState,
                     PlotRenderingInfo info) {

        // set up info collection...
        if (info != null) {
            info.setPlotArea(area);
        }

        // adjust the drawing area for plot insets (if any)...
        RectangleInsets insets = getInsets();
        insets.trim(area);

        // calculate the data area...
        AxisSpace space = calculateAxisSpace(g2, area);
        Rectangle2D dataArea = space.shrink(area, null);

        // set the width and height of non-shared axis of all sub-plots
        setFixedDomainAxisSpaceForSubplots(space);

        // draw the shared axis
        ValueAxis axis = getRangeAxis();
        RectangleEdge rangeEdge = getRangeAxisEdge();
        double cursor = RectangleEdge.coordinate(dataArea, rangeEdge);
        AxisState state = axis.draw(g2, cursor, area, dataArea, rangeEdge,
                info);
        if (parentState == null) {
            parentState = new PlotState();
        }
        parentState.getSharedAxisStates().put(axis, state);

        // draw all the charts
        for (int i = 0; i < this.subplots.size(); i++) {
            CategoryPlot plot = (CategoryPlot) this.subplots.get(i);
            PlotRenderingInfo subplotInfo = null;
            if (info != null) {
                subplotInfo = new PlotRenderingInfo(info.getOwner());
                info.addSubplotInfo(subplotInfo);
            }
            Point2D subAnchor = null;
            if (anchor != null && this.subplotArea[i].contains(anchor)) {
                subAnchor = anchor;
            }
            plot.draw(g2, this.subplotArea[i], subAnchor, parentState,
                    subplotInfo);
        }

        if (info != null) {
            info.setDataArea(dataArea);
        }

    }

    /**
     * Sets the orientation for the plot (and all the subplots).
     *
     * @param orientation  the orientation.
     */
    public void setOrientation(PlotOrientation orientation) {

        super.setOrientation(orientation);

        Iterator iterator = this.subplots.iterator();
        while (iterator.hasNext()) {
            CategoryPlot plot = (CategoryPlot) iterator.next();
            plot.setOrientation(orientation);
        }

    }

    /**
     * Returns a range representing the extent of the data values in this plot
     * (obtained from the subplots) that will be rendered against the specified
     * axis.  NOTE: This method is intended for internal JFreeChart use, and
     * is public only so that code in the axis classes can call it.  Since
     * only the range axis is shared between subplots, the JFreeChart code
     * will only call this method for the range values (although this is not
     * checked/enforced).
      *
      * @param axis  the axis.
      *
      * @return The range.
      */
     public Range getDataRange(ValueAxis axis) {
         Range result = null;
         if (this.subplots != null) {
             Iterator iterator = this.subplots.iterator();
             while (iterator.hasNext()) {
                 CategoryPlot subplot = (CategoryPlot) iterator.next();
                 result = Range.combine(result, subplot.getDataRange(axis));
             }
         }
         return result;
     }

    /**
     * Returns a collection of legend items for the plot.
     *
     * @return The legend items.
     */
    public LegendItemCollection getLegendItems() {
        LegendItemCollection result = getFixedLegendItems();
        if (result == null) {
            result = new LegendItemCollection();
            if (this.subplots != null) {
                Iterator iterator = this.subplots.iterator();
                while (iterator.hasNext()) {
                    CategoryPlot plot = (CategoryPlot) iterator.next();
                    LegendItemCollection more = plot.getLegendItems();
                    result.addAll(more);
                }
            }
        }
        return result;
    }

    /**
     * Sets the size (width or height, depending on the orientation of the
     * plot) for the domain axis of each subplot.
     *
     * @param space  the space.
     */
    protected void setFixedDomainAxisSpaceForSubplots(AxisSpace space) {
        Iterator iterator = this.subplots.iterator();
        while (iterator.hasNext()) {
            CategoryPlot plot = (CategoryPlot) iterator.next();
            plot.setFixedDomainAxisSpace(space, false);
        }
    }

    /**
     * Handles a 'click' on the plot by updating the anchor value.
     *
     * @param x  x-coordinate of the click.
     * @param y  y-coordinate of the click.
     * @param info  information about the plot's dimensions.
     *
     */
    public void handleClick(int x, int y, PlotRenderingInfo info) {

        Rectangle2D dataArea = info.getDataArea();
        if (dataArea.contains(x, y)) {
            for (int i = 0; i < this.subplots.size(); i++) {
                CategoryPlot subplot = (CategoryPlot) this.subplots.get(i);
                PlotRenderingInfo subplotInfo = info.getSubplotInfo(i);
                subplot.handleClick(x, y, subplotInfo);
            }
        }

    }

    /**
     * Receives a {@link PlotChangeEvent} and responds by notifying all
     * listeners.
     *
     * @param event  the event.
     */
    public void plotChanged(PlotChangeEvent event) {
        notifyListeners(event);
    }

    /**
     * Tests the plot 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 CombinedRangeCategoryPlot)) {
            return false;
        }
        CombinedRangeCategoryPlot that = (CombinedRangeCategoryPlot) obj;
        if (this.gap != that.gap) {
            return false;
        }
        if (!ObjectUtilities.equal(this.subplots, that.subplots)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns a clone of the plot.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  this class will not throw this
     *         exception, but subclasses (if any) might.
     */
    public Object clone() throws CloneNotSupportedException {
        CombinedRangeCategoryPlot result
            = (CombinedRangeCategoryPlot) super.clone();
        result.subplots = (List) ObjectUtilities.deepClone(this.subplots);
        for (Iterator it = result.subplots.iterator(); it.hasNext();) {
            Plot child = (Plot) it.next();
            child.setParent(result);
        }

        // after setting up all the subplots, the shared range axis may need
        // reconfiguring
        ValueAxis rangeAxis = result.getRangeAxis();
        if (rangeAxis != null) {
            rangeAxis.configure();
        }

        return result;
    }

    /**
     * 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();

        // the range axis is deserialized before the subplots, so its value
        // range is likely to be incorrect...
        ValueAxis rangeAxis = getRangeAxis();
        if (rangeAxis != null) {
            rangeAxis.configure();
        }

    }

}