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jfreechart example source code file (GanttRenderer.java)

This example jfreechart source code file (GanttRenderer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, categoryaxis, categoryplot, comparable, comparable, ganttcategorydataset, ganttrenderer, ganttrenderer, geometry, io, number, number, paint, rectangle2d, rectangle2d, rectangleedge, valueaxis

The jfreechart GanttRenderer.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.]
 *
 * ------------------
 * GanttRenderer.java
 * ------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 16-Sep-2003 : Version 1 (DG);
 * 23-Sep-2003 : Fixed Checkstyle issues (DG);
 * 21-Oct-2003 : Bar width moved into CategoryItemRendererState (DG);
 * 03-Feb-2004 : Added get/set methods for attributes (DG);
 * 12-Aug-2004 : Fixed rendering problem with maxBarWidth attribute (DG);
 * 05-Nov-2004 : Modified drawItem() signature (DG);
 * 20-Apr-2005 : Renamed CategoryLabelGenerator
 *               --> CategoryItemLabelGenerator (DG);
 * 01-Dec-2005 : Fix for bug 1369954, drawBarOutline flag ignored (DG);
 * ------------- JFREECHART 1.0.x --------------------------------------------
 * 17-Jan-2006 : Set includeBaseInRange flag to false (DG);
 * 20-Mar-2007 : Implemented equals() and fixed serialization (DG);
 * 24-Jun-2008 : Added new barPainter mechanism (DG);
 * 26-Jun-2008 : Added crosshair support (DG);
 *
 */

package org.jfree.chart.renderer.category;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
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.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.labels.CategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.gantt.GanttCategoryDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.PaintUtilities;

/**
 * A renderer for simple Gantt charts.  The example shown
 * here is generated by the <code>GanttDemo1.java program
 * included in the JFreeChart Demo Collection:
 * <br>
* <img src="../../../../../images/GanttRendererSample.png" * alt="GanttRendererSample.png" /> */ public class GanttRenderer extends IntervalBarRenderer implements Serializable { /** For serialization. */ private static final long serialVersionUID = -4010349116350119512L; /** The paint for displaying the percentage complete. */ private transient Paint completePaint; /** The paint for displaying the incomplete part of a task. */ private transient Paint incompletePaint; /** * Controls the starting edge of the progress indicator (expressed as a * percentage of the overall bar width). */ private double startPercent; /** * Controls the ending edge of the progress indicator (expressed as a * percentage of the overall bar width). */ private double endPercent; /** * Creates a new renderer. */ public GanttRenderer() { super(); setIncludeBaseInRange(false); this.completePaint = Color.green; this.incompletePaint = Color.red; this.startPercent = 0.35; this.endPercent = 0.65; } /** * Returns the paint used to show the percentage complete. * * @return The paint (never <code>null. * * @see #setCompletePaint(Paint) */ public Paint getCompletePaint() { return this.completePaint; } /** * Sets the paint used to show the percentage complete and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param paint the paint (<code>null not permitted). * * @see #getCompletePaint() */ public void setCompletePaint(Paint paint) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } this.completePaint = paint; fireChangeEvent(); } /** * Returns the paint used to show the percentage incomplete. * * @return The paint (never <code>null). * * @see #setCompletePaint(Paint) */ public Paint getIncompletePaint() { return this.incompletePaint; } /** * Sets the paint used to show the percentage incomplete and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param paint the paint (<code>null not permitted). * * @see #getIncompletePaint() */ public void setIncompletePaint(Paint paint) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } this.incompletePaint = paint; fireChangeEvent(); } /** * Returns the position of the start of the progress indicator, as a * percentage of the bar width. * * @return The start percent. * * @see #setStartPercent(double) */ public double getStartPercent() { return this.startPercent; } /** * Sets the position of the start of the progress indicator, as a * percentage of the bar width, and sends a {@link RendererChangeEvent} to * all registered listeners. * * @param percent the percent. * * @see #getStartPercent() */ public void setStartPercent(double percent) { this.startPercent = percent; fireChangeEvent(); } /** * Returns the position of the end of the progress indicator, as a * percentage of the bar width. * * @return The end percent. * * @see #setEndPercent(double) */ public double getEndPercent() { return this.endPercent; } /** * Sets the position of the end of the progress indicator, as a percentage * of the bar width, and sends a {@link RendererChangeEvent} to all * registered listeners. * * @param percent the percent. * * @see #getEndPercent() */ public void setEndPercent(double percent) { this.endPercent = percent; fireChangeEvent(); } /** * Draws the bar for a single (series, category) data item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the data area. * @param plot the plot. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the dataset. * @param row the row index (zero-based). * @param column the column index (zero-based). * @param pass the pass index. */ public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) { if (dataset instanceof GanttCategoryDataset) { GanttCategoryDataset gcd = (GanttCategoryDataset) dataset; drawTasks(g2, state, dataArea, plot, domainAxis, rangeAxis, gcd, row, column); } else { // let the superclass handle it... super.drawItem(g2, state, dataArea, plot, domainAxis, rangeAxis, dataset, row, column, pass); } } /** * Draws the tasks/subtasks for one item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the data plot area. * @param plot the plot. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the data. * @param row the row index (zero-based). * @param column the column index (zero-based). */ protected void drawTasks(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, GanttCategoryDataset dataset, int row, int column) { int count = dataset.getSubIntervalCount(row, column); if (count == 0) { drawTask(g2, state, dataArea, plot, domainAxis, rangeAxis, dataset, row, column); } PlotOrientation orientation = plot.getOrientation(); for (int subinterval = 0; subinterval < count; subinterval++) { RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge(); // value 0 Number value0 = dataset.getStartValue(row, column, subinterval); if (value0 == null) { return; } double translatedValue0 = rangeAxis.valueToJava2D( value0.doubleValue(), dataArea, rangeAxisLocation); // value 1 Number value1 = dataset.getEndValue(row, column, subinterval); if (value1 == null) { return; } double translatedValue1 = rangeAxis.valueToJava2D( value1.doubleValue(), dataArea, rangeAxisLocation); if (translatedValue1 < translatedValue0) { double temp = translatedValue1; translatedValue1 = translatedValue0; translatedValue0 = temp; } double rectStart = calculateBarW0(plot, plot.getOrientation(), dataArea, domainAxis, state, row, column); double rectLength = Math.abs(translatedValue1 - translatedValue0); double rectBreadth = state.getBarWidth(); // DRAW THE BARS... Rectangle2D bar = null; RectangleEdge barBase = null; if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { bar = new Rectangle2D.Double(translatedValue0, rectStart, rectLength, rectBreadth); barBase = RectangleEdge.LEFT; } else if (plot.getOrientation() == PlotOrientation.VERTICAL) { bar = new Rectangle2D.Double(rectStart, translatedValue0, rectBreadth, rectLength); barBase = RectangleEdge.BOTTOM; } Rectangle2D completeBar = null; Rectangle2D incompleteBar = null; Number percent = dataset.getPercentComplete(row, column, subinterval); double start = getStartPercent(); double end = getEndPercent(); if (percent != null) { double p = percent.doubleValue(); if (orientation == PlotOrientation.HORIZONTAL) { completeBar = new Rectangle2D.Double(translatedValue0, rectStart + start * rectBreadth, rectLength * p, rectBreadth * (end - start)); incompleteBar = new Rectangle2D.Double(translatedValue0 + rectLength * p, rectStart + start * rectBreadth, rectLength * (1 - p), rectBreadth * (end - start)); } else if (orientation == PlotOrientation.VERTICAL) { completeBar = new Rectangle2D.Double(rectStart + start * rectBreadth, translatedValue0 + rectLength * (1 - p), rectBreadth * (end - start), rectLength * p); incompleteBar = new Rectangle2D.Double(rectStart + start * rectBreadth, translatedValue0, rectBreadth * (end - start), rectLength * (1 - p)); } } if (getShadowsVisible()) { getBarPainter().paintBarShadow(g2, this, row, column, bar, barBase, true); } getBarPainter().paintBar(g2, this, row, column, bar, barBase); if (completeBar != null) { g2.setPaint(getCompletePaint()); g2.fill(completeBar); } if (incompleteBar != null) { g2.setPaint(getIncompletePaint()); g2.fill(incompleteBar); } if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) { g2.setStroke(getItemStroke(row, column)); g2.setPaint(getItemOutlinePaint(row, column)); g2.draw(bar); } if (subinterval == count - 1) { // submit the current data point as a crosshair candidate int datasetIndex = plot.indexOf(dataset); Comparable columnKey = dataset.getColumnKey(column); Comparable rowKey = dataset.getRowKey(row); double xx = domainAxis.getCategorySeriesMiddle(columnKey, rowKey, dataset, getItemMargin(), dataArea, plot.getDomainAxisEdge()); updateCrosshairValues(state.getCrosshairState(), dataset.getRowKey(row), dataset.getColumnKey(column), value1.doubleValue(), datasetIndex, xx, translatedValue1, orientation); } // collect entity and tool tip information... if (state.getInfo() != null) { EntityCollection entities = state.getEntityCollection(); if (entities != null) { addItemEntity(entities, dataset, row, column, bar); } } } } /** * Draws a single task. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the data plot area. * @param plot the plot. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the data. * @param row the row index (zero-based). * @param column the column index (zero-based). */ protected void drawTask(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, GanttCategoryDataset dataset, int row, int column) { PlotOrientation orientation = plot.getOrientation(); RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge(); // Y0 Number value0 = dataset.getEndValue(row, column); if (value0 == null) { return; } double java2dValue0 = rangeAxis.valueToJava2D(value0.doubleValue(), dataArea, rangeAxisLocation); // Y1 Number value1 = dataset.getStartValue(row, column); if (value1 == null) { return; } double java2dValue1 = rangeAxis.valueToJava2D(value1.doubleValue(), dataArea, rangeAxisLocation); if (java2dValue1 < java2dValue0) { double temp = java2dValue1; java2dValue1 = java2dValue0; java2dValue0 = temp; Number tempNum = value1; value1 = value0; value0 = tempNum; } double rectStart = calculateBarW0(plot, orientation, dataArea, domainAxis, state, row, column); double rectBreadth = state.getBarWidth(); double rectLength = Math.abs(java2dValue1 - java2dValue0); Rectangle2D bar = null; RectangleEdge barBase = null; if (orientation == PlotOrientation.HORIZONTAL) { bar = new Rectangle2D.Double(java2dValue0, rectStart, rectLength, rectBreadth); barBase = RectangleEdge.LEFT; } else if (orientation == PlotOrientation.VERTICAL) { bar = new Rectangle2D.Double(rectStart, java2dValue1, rectBreadth, rectLength); barBase = RectangleEdge.BOTTOM; } Rectangle2D completeBar = null; Rectangle2D incompleteBar = null; Number percent = dataset.getPercentComplete(row, column); double start = getStartPercent(); double end = getEndPercent(); if (percent != null) { double p = percent.doubleValue(); if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { completeBar = new Rectangle2D.Double(java2dValue0, rectStart + start * rectBreadth, rectLength * p, rectBreadth * (end - start)); incompleteBar = new Rectangle2D.Double(java2dValue0 + rectLength * p, rectStart + start * rectBreadth, rectLength * (1 - p), rectBreadth * (end - start)); } else if (plot.getOrientation() == PlotOrientation.VERTICAL) { completeBar = new Rectangle2D.Double(rectStart + start * rectBreadth, java2dValue1 + rectLength * (1 - p), rectBreadth * (end - start), rectLength * p); incompleteBar = new Rectangle2D.Double(rectStart + start * rectBreadth, java2dValue1, rectBreadth * (end - start), rectLength * (1 - p)); } } if (getShadowsVisible()) { getBarPainter().paintBarShadow(g2, this, row, column, bar, barBase, true); } getBarPainter().paintBar(g2, this, row, column, bar, barBase); if (completeBar != null) { g2.setPaint(getCompletePaint()); g2.fill(completeBar); } if (incompleteBar != null) { g2.setPaint(getIncompletePaint()); g2.fill(incompleteBar); } // draw the outline... if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) { Stroke stroke = getItemOutlineStroke(row, column); Paint paint = getItemOutlinePaint(row, column); if (stroke != null && paint != null) { g2.setStroke(stroke); g2.setPaint(paint); g2.draw(bar); } } CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column); if (generator != null && isItemLabelVisible(row, column)) { drawItemLabel(g2, dataset, row, column, plot, generator, bar, false); } // submit the current data point as a crosshair candidate int datasetIndex = plot.indexOf(dataset); Comparable columnKey = dataset.getColumnKey(column); Comparable rowKey = dataset.getRowKey(row); double xx = domainAxis.getCategorySeriesMiddle(columnKey, rowKey, dataset, getItemMargin(), dataArea, plot.getDomainAxisEdge()); updateCrosshairValues(state.getCrosshairState(), dataset.getRowKey(row), dataset.getColumnKey(column), value1.doubleValue(), datasetIndex, xx, java2dValue1, orientation); // collect entity and tool tip information... EntityCollection entities = state.getEntityCollection(); if (entities != null) { addItemEntity(entities, dataset, row, column, bar); } } /** * Returns the Java2D coordinate for the middle of the specified data item. * * @param rowKey the row key. * @param columnKey the column key. * @param dataset the dataset. * @param axis the axis. * @param area the drawing area. * @param edge the edge along which the axis lies. * * @return The Java2D coordinate. * * @since 1.0.11 */ public double getItemMiddle(Comparable rowKey, Comparable columnKey, CategoryDataset dataset, CategoryAxis axis, Rectangle2D area, RectangleEdge edge) { return axis.getCategorySeriesMiddle(columnKey, rowKey, dataset, getItemMargin(), area, edge); } /** * Tests this renderer for equality with an arbitrary object. * * @param obj the object (<code>null permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof GanttRenderer)) { return false; } GanttRenderer that = (GanttRenderer) obj; if (!PaintUtilities.equal(this.completePaint, that.completePaint)) { return false; } if (!PaintUtilities.equal(this.incompletePaint, that.incompletePaint)) { return false; } if (this.startPercent != that.startPercent) { return false; } if (this.endPercent != that.endPercent) { return false; } return super.equals(obj); } /** * 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(); SerialUtilities.writePaint(this.completePaint, stream); SerialUtilities.writePaint(this.incompletePaint, stream); } /** * 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.completePaint = SerialUtilities.readPaint(stream); this.incompletePaint = SerialUtilities.readPaint(stream); } }

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