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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D API, it supports a wide range of chart types including
bar charts, pie charts, line charts, XY-plots, time series plots, Sankey charts
and more.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-present, by David Gilbert 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.]
*
* --------------------
* HighLowRenderer.java
* --------------------
* (C) Copyright 2001-present, by David Gilbert.
*
* Original Author: David Gilbert;
* Contributor(s): Richard Atkinson;
* Christian W. Zuckschwerdt;
*
*/
package org.jfree.chart.renderer.xy;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.ui.RectangleEdge;
import org.jfree.chart.util.PaintUtils;
import org.jfree.chart.util.PublicCloneable;
import org.jfree.chart.util.SerialUtils;
import org.jfree.data.Range;
import org.jfree.data.general.DatasetUtils;
import org.jfree.data.xy.OHLCDataset;
import org.jfree.data.xy.XYDataset;
/**
* A renderer that draws high/low/open/close markers on an {@link XYPlot}
* (requires a {@link OHLCDataset}). This renderer does not include code to
* calculate the crosshair point for the plot.
*
* The example shown here is generated by the {@code HighLowChartDemo1.java}
* program included in the JFreeChart Demo Collection:
*
* 
*/
public class HighLowRenderer extends AbstractXYItemRenderer
implements XYItemRenderer, Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -8135673815876552516L;
/** A flag that controls whether the open ticks are drawn. */
private boolean drawOpenTicks;
/** A flag that controls whether the close ticks are drawn. */
private boolean drawCloseTicks;
/**
* The paint used for the open ticks (if {@code null}, the series
* paint is used instead).
*/
private transient Paint openTickPaint;
/**
* The paint used for the close ticks (if {@code null}, the series
* paint is used instead).
*/
private transient Paint closeTickPaint;
/**
* The tick length (in Java2D units).
*/
private double tickLength;
/**
* The default constructor.
*/
public HighLowRenderer() {
super();
this.drawOpenTicks = true;
this.drawCloseTicks = true;
this.tickLength = 2.0;
}
/**
* Returns the flag that controls whether open ticks are drawn.
*
* @return A boolean.
*
* @see #getDrawCloseTicks()
* @see #setDrawOpenTicks(boolean)
*/
public boolean getDrawOpenTicks() {
return this.drawOpenTicks;
}
/**
* Sets the flag that controls whether open ticks are drawn, and sends a
* {@link RendererChangeEvent} to all registered listeners.
*
* @param draw the flag.
*
* @see #getDrawOpenTicks()
*/
public void setDrawOpenTicks(boolean draw) {
this.drawOpenTicks = draw;
fireChangeEvent();
}
/**
* Returns the flag that controls whether close ticks are drawn.
*
* @return A boolean.
*
* @see #getDrawOpenTicks()
* @see #setDrawCloseTicks(boolean)
*/
public boolean getDrawCloseTicks() {
return this.drawCloseTicks;
}
/**
* Sets the flag that controls whether close ticks are drawn, and sends a
* {@link RendererChangeEvent} to all registered listeners.
*
* @param draw the flag.
*
* @see #getDrawCloseTicks()
*/
public void setDrawCloseTicks(boolean draw) {
this.drawCloseTicks = draw;
fireChangeEvent();
}
/**
* Returns the paint used to draw the ticks for the open values.
*
* @return The paint used to draw the ticks for the open values (possibly
* {@code null}).
*
* @see #setOpenTickPaint(Paint)
*/
public Paint getOpenTickPaint() {
return this.openTickPaint;
}
/**
* Sets the paint used to draw the ticks for the open values and sends a
* {@link RendererChangeEvent} to all registered listeners. If you set
* this to {@code null} (the default), the series paint is used
* instead.
*
* @param paint the paint ({@code null} permitted).
*
* @see #getOpenTickPaint()
*/
public void setOpenTickPaint(Paint paint) {
this.openTickPaint = paint;
fireChangeEvent();
}
/**
* Returns the paint used to draw the ticks for the close values.
*
* @return The paint used to draw the ticks for the close values (possibly
* {@code null}).
*
* @see #setCloseTickPaint(Paint)
*/
public Paint getCloseTickPaint() {
return this.closeTickPaint;
}
/**
* Sets the paint used to draw the ticks for the close values and sends a
* {@link RendererChangeEvent} to all registered listeners. If you set
* this to {@code null} (the default), the series paint is used
* instead.
*
* @param paint the paint ({@code null} permitted).
*
* @see #getCloseTickPaint()
*/
public void setCloseTickPaint(Paint paint) {
this.closeTickPaint = paint;
fireChangeEvent();
}
/**
* Returns the tick length (in Java2D units).
*
* @return The tick length.
*
* @see #setTickLength(double)
*/
public double getTickLength() {
return this.tickLength;
}
/**
* Sets the tick length (in Java2D units) and sends a
* {@link RendererChangeEvent} to all registered listeners.
*
* @param length the length.
*
* @see #getTickLength()
*/
public void setTickLength(double length) {
this.tickLength = length;
fireChangeEvent();
}
/**
* Returns the range of values the renderer requires to display all the
* items from the specified dataset.
*
* @param dataset the dataset ({@code null} permitted).
*
* @return The range ({@code null} if the dataset is {@code null}
* or empty).
*/
@Override
public Range findRangeBounds(XYDataset dataset) {
if (dataset != null) {
return DatasetUtils.findRangeBounds(dataset, true);
}
else {
return null;
}
}
/**
* Draws the visual representation of a single data item.
*
* @param g2 the graphics device.
* @param state the renderer state.
* @param dataArea the area within which the plot is being drawn.
* @param info collects information about the drawing.
* @param plot the plot (can be used to obtain standard color
* information etc).
* @param domainAxis the domain axis.
* @param rangeAxis the range axis.
* @param dataset the dataset.
* @param series the series index (zero-based).
* @param item the item index (zero-based).
* @param crosshairState crosshair information for the plot
* ({@code null} permitted).
* @param pass the pass index.
*/
@Override
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) {
double x = dataset.getXValue(series, item);
if (!domainAxis.getRange().contains(x)) {
return; // the x value is not within the axis range
}
double xx = domainAxis.valueToJava2D(x, dataArea,
plot.getDomainAxisEdge());
// setup for collecting optional entity info...
Shape entityArea = null;
EntityCollection entities = null;
if (info != null) {
entities = info.getOwner().getEntityCollection();
}
PlotOrientation orientation = plot.getOrientation();
RectangleEdge location = plot.getRangeAxisEdge();
Paint itemPaint = getItemPaint(series, item);
Stroke itemStroke = getItemStroke(series, item);
g2.setPaint(itemPaint);
g2.setStroke(itemStroke);
if (dataset instanceof OHLCDataset) {
OHLCDataset hld = (OHLCDataset) dataset;
double yHigh = hld.getHighValue(series, item);
double yLow = hld.getLowValue(series, item);
if (!Double.isNaN(yHigh) && !Double.isNaN(yLow)) {
double yyHigh = rangeAxis.valueToJava2D(yHigh, dataArea,
location);
double yyLow = rangeAxis.valueToJava2D(yLow, dataArea,
location);
if (orientation == PlotOrientation.HORIZONTAL) {
g2.draw(new Line2D.Double(yyLow, xx, yyHigh, xx));
entityArea = new Rectangle2D.Double(Math.min(yyLow, yyHigh),
xx - 1.0, Math.abs(yyHigh - yyLow), 2.0);
}
else if (orientation == PlotOrientation.VERTICAL) {
g2.draw(new Line2D.Double(xx, yyLow, xx, yyHigh));
entityArea = new Rectangle2D.Double(xx - 1.0,
Math.min(yyLow, yyHigh), 2.0,
Math.abs(yyHigh - yyLow));
}
}
double delta = getTickLength();
if (domainAxis.isInverted()) {
delta = -delta;
}
if (getDrawOpenTicks()) {
double yOpen = hld.getOpenValue(series, item);
if (!Double.isNaN(yOpen)) {
double yyOpen = rangeAxis.valueToJava2D(yOpen, dataArea,
location);
if (this.openTickPaint != null) {
g2.setPaint(this.openTickPaint);
}
else {
g2.setPaint(itemPaint);
}
if (orientation == PlotOrientation.HORIZONTAL) {
g2.draw(new Line2D.Double(yyOpen, xx + delta, yyOpen,
xx));
}
else if (orientation == PlotOrientation.VERTICAL) {
g2.draw(new Line2D.Double(xx - delta, yyOpen, xx,
yyOpen));
}
}
}
if (getDrawCloseTicks()) {
double yClose = hld.getCloseValue(series, item);
if (!Double.isNaN(yClose)) {
double yyClose = rangeAxis.valueToJava2D(
yClose, dataArea, location);
if (this.closeTickPaint != null) {
g2.setPaint(this.closeTickPaint);
}
else {
g2.setPaint(itemPaint);
}
if (orientation == PlotOrientation.HORIZONTAL) {
g2.draw(new Line2D.Double(yyClose, xx, yyClose,
xx - delta));
}
else if (orientation == PlotOrientation.VERTICAL) {
g2.draw(new Line2D.Double(xx, yyClose, xx + delta,
yyClose));
}
}
}
}
else {
// not a HighLowDataset, so just draw a line connecting this point
// with the previous point...
if (item > 0) {
double x0 = dataset.getXValue(series, item - 1);
double y0 = dataset.getYValue(series, item - 1);
double y = dataset.getYValue(series, item);
if (Double.isNaN(x0) || Double.isNaN(y0) || Double.isNaN(y)) {
return;
}
double xx0 = domainAxis.valueToJava2D(x0, dataArea,
plot.getDomainAxisEdge());
double yy0 = rangeAxis.valueToJava2D(y0, dataArea, location);
double yy = rangeAxis.valueToJava2D(y, dataArea, location);
if (orientation == PlotOrientation.HORIZONTAL) {
g2.draw(new Line2D.Double(yy0, xx0, yy, xx));
}
else if (orientation == PlotOrientation.VERTICAL) {
g2.draw(new Line2D.Double(xx0, yy0, xx, yy));
}
}
}
if (entities != null) {
addEntity(entities, entityArea, dataset, series, item, 0.0, 0.0);
}
}
/**
* Returns a clone of the renderer.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the renderer cannot be cloned.
*/
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Tests this renderer for equality with an arbitrary object.
*
* @param obj the object ({@code null} permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof HighLowRenderer)) {
return false;
}
HighLowRenderer that = (HighLowRenderer) obj;
if (this.drawOpenTicks != that.drawOpenTicks) {
return false;
}
if (this.drawCloseTicks != that.drawCloseTicks) {
return false;
}
if (!PaintUtils.equal(this.openTickPaint, that.openTickPaint)) {
return false;
}
if (!PaintUtils.equal(this.closeTickPaint, that.closeTickPaint)) {
return false;
}
if (this.tickLength != that.tickLength) {
return false;
}
if (!super.equals(obj)) {
return false;
}
return true;
}
/**
* 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.openTickPaint = SerialUtils.readPaint(stream);
this.closeTickPaint = SerialUtils.readPaint(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();
SerialUtils.writePaint(this.openTickPaint, stream);
SerialUtils.writePaint(this.closeTickPaint, stream);
}
}