/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------------------
* CombinedRangeCategoryPlot.java
* ------------------------------
* (C) Copyright 2003-2008, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Nicolas Brodu;
*
* Changes:
* --------
* 16-May-2003 : Version 1 (DG);
* 08-Aug-2003 : Adjusted totalWeight in remove() method (DG);
* 19-Aug-2003 : Implemented Cloneable (DG);
* 11-Sep-2003 : Fix cloning support (subplots) (NB);
* 15-Sep-2003 : Implemented PublicCloneable. Fixed errors in cloning and
* serialization (DG);
* 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
* 17-Sep-2003 : Updated handling of 'clicks' (DG);
* 04-May-2004 : Added getter/setter methods for 'gap' attributes (DG);
* 12-Nov-2004 : Implements the new Zoomable interface (DG);
* 25-Nov-2004 : Small update to clone() implementation (DG);
* 21-Feb-2005 : Fixed bug in remove() method (id = 1121172) (DG);
* 21-Feb-2005 : The getLegendItems() method now returns the fixed legend
* items if set (DG);
* 05-May-2005 : Updated draw() method parameters (DG);
* 14-Nov-2007 : Updated setFixedDomainAxisSpaceForSubplots() method (DG);
* 27-Mar-2008 : Add documentation for getDataRange() method (DG);
* 31-Mar-2008 : Updated getSubplots() to return EMPTY_LIST for null
* subplots, as suggested by Richard West (DG);
* 26-Jun-2008 : Fixed crosshair support (DG);
* 11-Aug-2008 : Don't store totalWeight of subplots, calculate it as
* required (DG);
*
*/
package org.jfree.chart.plot;
import java.awt.Graphics2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.axis.AxisState;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.chart.event.PlotChangeListener;
import org.jfree.data.Range;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
/**
* A combined category plot where the range axis is shared.
*/
public class CombinedRangeCategoryPlot extends CategoryPlot
implements PlotChangeListener {
/** For serialization. */
private static final long serialVersionUID = 7260210007554504515L;
/** Storage for the subplot references. */
private List subplots;
/** The gap between subplots. */
private double gap;
/** Temporary storage for the subplot areas. */
private transient Rectangle2D[] subplotArea; // TODO: move to plot state
/**
* Default constructor.
*/
public CombinedRangeCategoryPlot() {
this(new NumberAxis());
}
/**
* Creates a new plot.
*
* @param rangeAxis the shared range axis.
*/
public CombinedRangeCategoryPlot(ValueAxis rangeAxis) {
super(null, null, rangeAxis, null);
this.subplots = new java.util.ArrayList();
this.gap = 5.0;
}
/**
* Returns the space between subplots.
*
* @return The gap (in Java2D units).
*/
public double getGap() {
return this.gap;
}
/**
* Sets the amount of space between subplots and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param gap the gap between subplots (in Java2D units).
*/
public void setGap(double gap) {
this.gap = gap;
fireChangeEvent();
}
/**
* Adds a subplot (with a default 'weight' of 1) and sends a
* {@link PlotChangeEvent} to all registered listeners.
* <br><br>
* You must ensure that the subplot has a non-null domain axis. The range
* axis for the subplot will be set to <code>null</code>.
*
* @param subplot the subplot (<code>null</code> not permitted).
*/
public void add(CategoryPlot subplot) {
// defer argument checking
add(subplot, 1);
}
/**
* Adds a subplot and sends a {@link PlotChangeEvent} to all registered
* listeners.
* <br><br>
* You must ensure that the subplot has a non-null domain axis. The range
* axis for the subplot will be set to <code>null</code>.
*
* @param subplot the subplot (<code>null</code> not permitted).
* @param weight the weight (must be >= 1).
*/
public void add(CategoryPlot subplot, int weight) {
if (subplot == null) {
throw new IllegalArgumentException("Null 'subplot' argument.");
}
if (weight <= 0) {
throw new IllegalArgumentException("Require weight >= 1.");
}
// store the plot and its weight
subplot.setParent(this);
subplot.setWeight(weight);
subplot.setInsets(new RectangleInsets(0.0, 0.0, 0.0, 0.0));
subplot.setRangeAxis(null);
subplot.setOrientation(getOrientation());
subplot.addChangeListener(this);
this.subplots.add(subplot);
// configure the range axis...
ValueAxis axis = getRangeAxis();
if (axis != null) {
axis.configure();
}
fireChangeEvent();
}
/**
* Removes a subplot from the combined chart.
*
* @param subplot the subplot (<code>null</code> not permitted).
*/
public void remove(CategoryPlot subplot) {
if (subplot == null) {
throw new IllegalArgumentException(" Null 'subplot' argument.");
}
int position = -1;
int size = this.subplots.size();
int i = 0;
while (position == -1 && i < size) {
if (this.subplots.get(i) == subplot) {
position = i;
}
i++;
}
if (position != -1) {
this.subplots.remove(position);
subplot.setParent(null);
subplot.removeChangeListener(this);
ValueAxis range = getRangeAxis();
if (range != null) {
range.configure();
}
ValueAxis range2 = getRangeAxis(1);
if (range2 != null) {
range2.configure();
}
fireChangeEvent();
}
}
/**
* Returns the list of subplots. The returned list may be empty, but is
* never <code>null</code>.
*
* @return An unmodifiable list of subplots.
*/
public List getSubplots() {
if (this.subplots != null) {
return Collections.unmodifiableList(this.subplots);
}
else {
return Collections.EMPTY_LIST;
}
}
/**
* Calculates the space required for the axes.
*
* @param g2 the graphics device.
* @param plotArea the plot area.
*
* @return The space required for the axes.
*/
protected AxisSpace calculateAxisSpace(Graphics2D g2,
Rectangle2D plotArea) {
AxisSpace space = new AxisSpace();
PlotOrientation orientation = getOrientation();
// work out the space required by the domain axis...
AxisSpace fixed = getFixedRangeAxisSpace();
if (fixed != null) {
if (orientation == PlotOrientation.VERTICAL) {
space.setLeft(fixed.getLeft());
space.setRight(fixed.getRight());
}
else if (orientation == PlotOrientation.HORIZONTAL) {
space.setTop(fixed.getTop());
space.setBottom(fixed.getBottom());
}
}
else {
ValueAxis valueAxis = getRangeAxis();
RectangleEdge valueEdge = Plot.resolveRangeAxisLocation(
getRangeAxisLocation(), orientation);
if (valueAxis != null) {
space = valueAxis.reserveSpace(g2, this, plotArea, valueEdge,
space);
}
}
Rectangle2D adjustedPlotArea = space.shrink(plotArea, null);
// work out the maximum height or width of the non-shared axes...
int n = this.subplots.size();
int totalWeight = 0;
for (int i = 0; i < n; i++) {
CategoryPlot sub = (CategoryPlot) this.subplots.get(i);
totalWeight += sub.getWeight();
}
// calculate plotAreas of all sub-plots, maximum vertical/horizontal
// axis width/height
this.subplotArea = new Rectangle2D[n];
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();
}
}
}
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