combinedrangexyplot.java

jfreechart安装程序和使用说明

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

            AxisSpace subSpace = plot.calculateDomainAxisSpace(g2, this.subplotAreas[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 parentState  the state from the parent plot (if there is one).
     * @param info  collects information about the drawing (<code>null</code> permitted).
     */
    public void draw(Graphics2D g2, 
                     Rectangle2D area, 
                     PlotState parentState,
                     PlotRenderingInfo info) {
        draw(g2, area, null, parentState, info);                          
    }
    
    /**
     * Draws the plot within the specified area on a graphics device.
     * 
     * @param g2  the graphics device.
     * @param area  the plot area (in Java2D space).
     * @param anchor  an anchor point in Java2D space (<code>null</code> permitted).
     * @param parentState  the state from the parent plot, if there is one (<code>null</code> 
     *                     permitted).
     * @param info  collects chart drawing information (<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)...
        Insets insets = getInsets();
        if (insets != null) {
            area.setRect(area.getX() + insets.left,
                         area.getY() + insets.top,
                         area.getWidth() - insets.left - insets.right,
                         area.getHeight() - insets.top - insets.bottom);
        }

        AxisSpace space = calculateAxisSpace(g2, area);
        Rectangle2D dataArea = space.shrink(area, null);
        //this.axisOffset.trim(dataArea);

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

        // draw the shared axis
        ValueAxis axis = getRangeAxis();
        RectangleEdge edge = getRangeAxisEdge();
        double cursor = RectangleEdge.coordinate(dataArea, edge);
        AxisState axisState = axis.draw(g2, cursor, area, dataArea, edge, info);

        if (parentState == null) {
            parentState = new PlotState();
        }
        parentState.getSharedAxisStates().put(axis, axisState);
        
        // draw all the charts
        for (int i = 0; i < this.subplots.size(); i++) {
            XYPlot plot = (XYPlot) this.subplots.get(i);
            PlotRenderingInfo subplotInfo = null;
            if (info != null) {
                subplotInfo = new PlotRenderingInfo(info.getOwner());
                info.addSubplotInfo(subplotInfo);
            }
            plot.draw(g2, this.subplotAreas[i], anchor, parentState, subplotInfo);
        }

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

    }

    /**
     * Returns a collection of legend items for the plot.
     *
     * @return the legend items.
     */
    public LegendItemCollection getLegendItems() {

        LegendItemCollection result = new LegendItemCollection();

        if (this.subplots != null) {
            Iterator iterator = this.subplots.iterator();
            while (iterator.hasNext()) {
                XYPlot plot = (XYPlot) iterator.next();
                LegendItemCollection more = plot.getLegendItems();
                result.addAll(more);
            }
        }

        return result;

    }

    /**
     * A zoom method that (currently) does nothing.
     *
     * @param percent  the zoom percentage.
     */
    public void zoom(double percent) {
        // need to decide how to handle zooming...
    }

    /**
     * Sets the item renderer FOR ALL SUBPLOTS.  Registered listeners are notified that the plot
     * has been modified.
     * <P>
     * Note: usually you will want to set the renderer independently for each subplot, which is
     * NOT what this method does.
     *
     * @param renderer the new renderer.
     */
    public void setRenderer(XYItemRenderer renderer) {

        super.setRenderer(renderer);  // not strictly necessary, since the renderer set for the
                                      // parent plot is not used

        Iterator iterator = this.subplots.iterator();
        while (iterator.hasNext()) {
            XYPlot plot = (XYPlot) iterator.next();
            plot.setRenderer(renderer);
        }

    }

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

        super.setOrientation(orientation);

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

    }

    /**
     * Returns the range for the axis.  This is the combined range of all the subplots.
     *
     * @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()) {
                XYPlot subplot = (XYPlot) iterator.next();
                result = Range.combine(result, subplot.getDataRange(axis));
            }
        }
        return result;

    }

    /**
     * Sets the space (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()) {
            XYPlot plot = (XYPlot) iterator.next();
            plot.setFixedDomainAxisSpace(space);
        }

    }

    /**
     * Handles a 'click' on the plot by updating the anchor values...
     *
     * @param x  x-coordinate, where the click occured.
     * @param y  y-coordinate, where the click occured.
     * @param info  object containing information about the plot 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++) {
                XYPlot subplot = (XYPlot) 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 this plot for equality with another object.
     *
     * @param obj  the other object.
     *
     * @return <code>true</code> or <code>false</code>.
     */
    public boolean equals(Object obj) {

        if (obj == null) {
            return false;
        }

        if (obj == this) {
            return true;
        }

        if (obj instanceof CombinedRangeXYPlot) {
            CombinedRangeXYPlot p = (CombinedRangeXYPlot) obj;
            if (super.equals(obj)) {
                boolean b0 = ObjectUtils.equal(this.subplots, p.subplots);
                boolean b1 = (this.totalWeight == p.totalWeight);
                boolean b2 = (this.gap == p.gap);
                return b0 && b1 && b2;
            }
        }

        return false;
    }
    
    /**
     * 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 {
        
        CombinedRangeXYPlot result = (CombinedRangeXYPlot) super.clone(); 
        result.subplots = ObjectUtils.clone(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;
    }

}