jfreechart example source code file (CombinedDomainXYPlot.java)
The jfreechart CombinedDomainXYPlot.java source code/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2008, 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.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -------------------------
* CombinedDomainXYPlot.java
* -------------------------
* (C) Copyright 2001-2008, by Bill Kelemen and Contributors.
*
* Original Author: Bill Kelemen;
* Contributor(s): David Gilbert (for Object Refinery Limited);
* Anthony Boulestreau;
* David Basten;
* Kevin Frechette (for ISTI);
* Nicolas Brodu;
* Petr Kubanek (bug 1606205);
*
* Changes:
* --------
* 06-Dec-2001 : Version 1 (BK);
* 12-Dec-2001 : Removed unnecessary 'throws' clause from constructor (DG);
* 18-Dec-2001 : Added plotArea attribute and get/set methods (BK);
* 22-Dec-2001 : Fixed bug in chartChanged with multiple combinations of
* CombinedPlots (BK);
* 08-Jan-2002 : Moved to new package com.jrefinery.chart.combination (DG);
* 25-Feb-2002 : Updated import statements (DG);
* 28-Feb-2002 : Readded "this.plotArea = plotArea" that was deleted from
* draw() method (BK);
* 26-Mar-2002 : Added an empty zoom method (this method needs to be written so
* that combined plots will support zooming (DG);
* 29-Mar-2002 : Changed the method createCombinedAxis adding the creation of
* OverlaidSymbolicAxis and CombinedSymbolicAxis(AB);
* 23-Apr-2002 : Renamed CombinedPlot-->MultiXYPlot, and simplified the
* structure (DG);
* 23-May-2002 : Renamed (again) MultiXYPlot-->CombinedXYPlot (DG);
* 19-Jun-2002 : Added get/setGap() methods suggested by David Basten (DG);
* 25-Jun-2002 : Removed redundant imports (DG);
* 16-Jul-2002 : Draws shared axis after subplots (to fix missing gridlines),
* added overrides of 'setSeriesPaint()' and 'setXYItemRenderer()'
* that pass changes down to subplots (KF);
* 09-Oct-2002 : Added add(XYPlot) method (DG);
* 26-Mar-2003 : Implemented Serializable (DG);
* 16-May-2003 : Renamed CombinedXYPlot --> CombinedDomainXYPlot (DG);
* 04-Aug-2003 : Removed leftover code that was causing domain axis drawing
* problem (DG);
* 08-Aug-2003 : Adjusted totalWeight in remove() method (DG);
* 21-Aug-2003 : Implemented Cloneable (DG);
* 11-Sep-2003 : Fix cloning support (subplots) (NB);
* 15-Sep-2003 : Fixed error in cloning (DG);
* 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
* 17-Sep-2003 : Updated handling of 'clicks' (DG);
* 12-Nov-2004 : Implemented the new Zoomable interface (DG);
* 25-Nov-2004 : Small update to clone() implementation (DG);
* 21-Feb-2005 : The getLegendItems() method now returns the fixed legend
* items if set (DG);
* 05-May-2005 : Removed unused draw() method (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 23-Aug-2006 : Override setFixedRangeAxisSpace() to update subplots (DG);
* 06-Feb-2007 : Fixed bug 1606205, draw shared axis after subplots (DG);
* 23-Mar-2007 : Reverted previous patch (bug fix 1606205) (DG);
* 17-Apr-2007 : Added null argument checks to findSubplot() (DG);
* 27-Nov-2007 : Modified setFixedRangeAxisSpaceForSubplots() so as not to
* trigger change event in subplots (DG);
* 28-Jan-2008 : Reset fixed range axis space in subplots for each call to
* draw() (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);
* 28-Apr-2008 : Fixed zooming problem (see bug 1950037) (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.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.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.Range;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
/**
* An extension of {@link XYPlot} that contains multiple subplots that share a
* common domain axis.
*/
public class CombinedDomainXYPlot extends XYPlot
implements PlotChangeListener {
/** For serialization. */
private static final long serialVersionUID = -7765545541261907383L;
/** Storage for the subplot references. */
private List subplots;
/** The gap between subplots. */
private double gap = 5.0;
/** Temporary storage for the subplot areas. */
private transient Rectangle2D[] subplotAreas;
// TODO: the subplot areas needs to be moved out of the plot into the plot
// state
/**
* Default constructor.
*/
public CombinedDomainXYPlot() {
this(new NumberAxis());
}
/**
* Creates a new combined plot that shares a domain axis among multiple
* subplots.
*
* @param domainAxis the shared axis.
*/
public CombinedDomainXYPlot(ValueAxis domainAxis) {
super(
null, // no data in the parent plot
domainAxis,
null, // no range axis
null // no rendereer
);
this.subplots = new java.util.ArrayList();
}
/**
* Returns a string describing the type of plot.
*
* @return The type of plot.
*/
public String getPlotType() {
return "Combined_Domain_XYPlot";
}
/**
* Sets the orientation for the plot (also changes the orientation for all
* the subplots to match).
*
* @param orientation the orientation (<code>null not allowed).
*/
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 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 domain axis is shared between subplots, the JFreeChart code
* will only call this method for the domain values (although this is not
* checked/enforced).
*
* @param axis the axis.
*
* @return The range (possibly <code>null).
*/
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;
}
/**
* Returns the gap between subplots, measured in Java2D units.
*
* @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.
* <P>
* The domain axis for the subplot will be set to <code>null. You
* must ensure that the subplot has a non-null range axis.
*
* @param subplot the subplot (<code>null not permitted).
*/
public void add(XYPlot subplot) {
// defer argument checking
add(subplot, 1);
}
/**
* Adds a subplot with the specified weight and sends a
* {@link PlotChangeEvent} to all registered listeners. The weight
* determines how much space is allocated to the subplot relative to all
* the other subplots.
* <P>
* The domain axis for the subplot will be set to <code>null. You
* must ensure that the subplot has a non-null range axis.
*
* @param subplot the subplot (<code>null not permitted).
* @param weight the weight (must be >= 1).
*/
public void add(XYPlot 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), false);
subplot.setDomainAxis(null);
subplot.addChangeListener(this);
this.subplots.add(subplot);
ValueAxis axis = getDomainAxis();
if (axis != null) {
axis.configure();
}
fireChangeEvent();
}
/**
* Removes a subplot from the combined chart and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param subplot the subplot (<code>null not permitted).
*/
public void remove(XYPlot 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 domain = getDomainAxis();
if (domain != null) {
domain.configure();
}
fireChangeEvent();
}
}
/**
* Returns the list of subplots. The returned list may be empty, but is
* never <code>null.
*
* @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 axis space required.
*
* @param g2 the graphics device.
* @param plotArea the plot area.
*
* @return The space.
*/
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 = getFixedDomainAxisSpace();
if (fixed != null) {
if (orientation == PlotOrientation.HORIZONTAL) {
space.setLeft(fixed.getLeft());
space.setRight(fixed.getRight());
}
else if (orientation == PlotOrientation.VERTICAL) {
space.setTop(fixed.getTop());
space.setBottom(fixed.getBottom());
}
}
else {
ValueAxis xAxis = getDomainAxis();
RectangleEdge xEdge = Plot.resolveDomainAxisLocation(
getDomainAxisLocation(), orientation);
if (xAxis != null) {
space = xAxis.reserveSpace(g2, this, plotArea, xEdge, 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++) {
XYPlot sub = (XYPlot) this.subplots.get(i);
totalWeight += sub.getWeight();
}
this.subplotAreas = new Rectangle2D[n];
double x = adjustedPlotArea.getX();
double y = adjustedPlotArea.getY();
double usableSize = 0.0;
if (orientation == PlotOrientation.HORIZONTAL) {
usableSize = adjustedPlotArea.getWidth() - this.gap * (n - 1);
}
else if (orientation == PlotOrientation.VERTICAL) {
usableSize = adjustedPlotArea.getHeight() - this.gap * (n - 1);
}
for (int i = 0; i < n; i++) {
XYPlot plot = (XYPlot) this.subplots.get(i);
// calculate sub-plot area
if (orientation == PlotOrientation.HORIZONTAL) {
double w = usableSize * plot.getWeight() / totalWeight;
this.subplotAreas[i] = new Rectangle2D.Double(x, y, w,
adjustedPlotArea.getHeight());
x = x + w + this.gap;
}
else if (orientation == PlotOrientation.VERTICAL) {
double h = usableSize * plot.getWeight() / totalWeight;
this.subplotAreas[i] = new Rectangle2D.Double(x, y,
adjustedPlotArea.getWidth(), h);
y = y + h + this.gap;
}
AxisSpace subSpace = plot.calculateRangeAxisSpace(g2,
this.subplotAreas[i], null);
space.ensureAtLeast(subSpace);
}
return space;
}
/**
* 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
* permitted).
* @param parentState the state from the parent plot, if there is one
* (<code>null permitted).
* @param info collects chart drawing information (<code>null
* 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);
setFixedRangeAxisSpaceForSubplots(null);
AxisSpace space = calculateAxisSpace(g2, area);
Rectangle2D dataArea = space.shrink(area, null);
// set the width and height of non-shared axis of all sub-plots
setFixedRangeAxisSpaceForSubplots(space);
// draw the shared axis
ValueAxis axis = getDomainAxis();
RectangleEdge edge = getDomainAxisEdge();
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 subplots
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 = getFixedLegendItems();
if (result == null) {
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;
}
/**
* Multiplies the range on the range axis/axes by the specified factor.
*
* @param factor the zoom factor.
* @param info the plot rendering info (<code>null not permitted).
* @param source the source point (<code>null not permitted).
*/
public void zoomRangeAxes(double factor, PlotRenderingInfo info,
Point2D source) {
zoomRangeAxes(factor, info, source, false);
}
/**
* Multiplies the range on the range axis/axes by the specified factor.
*
* @param factor the zoom factor.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
* @param useAnchor use source point as zoom anchor?
*/
public void zoomRangeAxes(double factor, PlotRenderingInfo state,
Point2D source, boolean useAnchor) {
// delegate 'state' and 'source' argument checks...
XYPlot subplot = findSubplot(state, source);
if (subplot != null) {
subplot.zoomRangeAxes(factor, state, source, useAnchor);
}
else {
// if the source point doesn't fall within a subplot, we do the
// zoom on all subplots...
Iterator iterator = getSubplots().iterator();
while (iterator.hasNext()) {
subplot = (XYPlot) iterator.next();
subplot.zoomRangeAxes(factor, state, source, useAnchor);
}
}
}
/**
* Zooms in on the range axes.
*
* @param lowerPercent the lower bound.
* @param upperPercent the upper bound.
* @param info the plot rendering info (<code>null not permitted).
* @param source the source point (<code>null not permitted).
*/
public void zoomRangeAxes(double lowerPercent, double upperPercent,
PlotRenderingInfo info, Point2D source) {
// delegate 'info' and 'source' argument checks...
XYPlot subplot = findSubplot(info, source);
if (subplot != null) {
subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
}
else {
// if the source point doesn't fall within a subplot, we do the
// zoom on all subplots...
Iterator iterator = getSubplots().iterator();
while (iterator.hasNext()) {
subplot = (XYPlot) iterator.next();
subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
}
}
}
/**
* Returns the subplot (if any) that contains the (x, y) point (specified
* in Java2D space).
*
* @param info the chart rendering info (<code>null not permitted).
* @param source the source point (<code>null not permitted).
*
* @return A subplot (possibly <code>null).
*/
public XYPlot findSubplot(PlotRenderingInfo info, Point2D source) {
if (info == null) {
throw new IllegalArgumentException("Null 'info' argument.");
}
if (source == null) {
throw new IllegalArgumentException("Null 'source' argument.");
}
XYPlot result = null;
int subplotIndex = info.getSubplotIndex(source);
if (subplotIndex >= 0) {
result = (XYPlot) this.subplots.get(subplotIndex);
}
return result;
}
/**
* 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 fixed range axis space and sends a {@link PlotChangeEvent} to
* all registered listeners.
*
* @param space the space (<code>null permitted).
*/
public void setFixedRangeAxisSpace(AxisSpace space) {
super.setFixedRangeAxisSpace(space);
setFixedRangeAxisSpaceForSubplots(space);
fireChangeEvent();
}
/**
* 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 setFixedRangeAxisSpaceForSubplots(AxisSpace space) {
Iterator iterator = this.subplots.iterator();
while (iterator.hasNext()) {
XYPlot plot = (XYPlot) iterator.next();
plot.setFixedRangeAxisSpace(space, false);
}
}
/**
* 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 or
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