Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2014, 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.] * * ------------------ * XYBarRenderer.java * ------------------ * (C) Copyright 2001-2014, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Richard Atkinson; * Christian W. Zuckschwerdt; * Bill Kelemen; * Marc van Glabbeek (bug 1775452); * Richard West, Advanced Micro Devices, Inc.; * * Changes * ------- * 13-Dec-2001 : Version 1, makes VerticalXYBarPlot class redundant (DG); * 23-Jan-2002 : Added DrawInfo parameter to drawItem() method (DG); * 09-Apr-2002 : Removed the translated zero from the drawItem method. Override * the initialise() method to calculate it (DG); * 24-May-2002 : Incorporated tooltips into chart entities (DG); * 25-Jun-2002 : Removed redundant import (DG); * 05-Aug-2002 : Small modification to drawItem method to support URLs for HTML * image maps (RA); * 25-Mar-2003 : Implemented Serializable (DG); * 01-May-2003 : Modified drawItem() method signature (DG); * 30-Jul-2003 : Modified entity constructor (CZ); * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG); * 24-Aug-2003 : Added null checks in drawItem (BK); * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG); * 07-Oct-2003 : Added renderer state (DG); * 05-Dec-2003 : Changed call to obtain outline paint (DG); * 10-Feb-2004 : Added state class, updated drawItem() method to make * cut-and-paste overriding easier, and replaced property change * with RendererChangeEvent (DG); * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState (DG); * 26-Apr-2004 : Added gradient paint transformer (DG); * 19-May-2004 : Fixed bug (879709) with bar zero value for secondary axis (DG); * 15-Jul-2004 : Switched getX() with getXValue() and getY() with * getYValue() (DG); * 01-Sep-2004 : Added a flag to control whether or not the bar outlines are * drawn (DG); * 03-Sep-2004 : Added option to use y-interval from dataset to determine the * length of the bars (DG); * 08-Sep-2004 : Added equals() method and updated clone() method (DG); * 26-Jan-2005 : Added override for getLegendItem() method (DG); * 20-Apr-2005 : Use generators for label tooltips and URLs (DG); * 19-May-2005 : Added minimal item label implementation - needs improving (DG); * 14-Oct-2005 : Fixed rendering problem with inverted axes (DG); * ------------- JFREECHART 1.0.x --------------------------------------------- * 21-Jun-2006 : Improved item label handling - see bug 1501768 (DG); * 24-Aug-2006 : Added crosshair support (DG); * 13-Dec-2006 : Updated getLegendItems() to return gradient paint * transformer (DG); * 02-Feb-2007 : Changed setUseYInterval() to only notify when the flag * changes (DG); * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG); * 09-Feb-2007 : Updated getLegendItem() to observe drawBarOutline flag (DG); * 05-Mar-2007 : Applied patch 1671126 by Sergei Ivanov, to fix rendering with * LogarithmicAxis (DG); * 20-Apr-2007 : Updated getLegendItem() for renderer change (DG); * 17-May-2007 : Set datasetIndex and seriesIndex in getLegendItem() (DG); * 18-May-2007 : Set dataset and seriesKey for LegendItem (DG); * 15-Jun-2007 : Changed default for drawBarOutline to false (DG); * 26-Sep-2007 : Fixed bug 1775452, problem with bar margins for inverted * axes, thanks to Marc van Glabbeek (DG); * 12-Nov-2007 : Fixed NPE in drawItemLabel() method, thanks to Richard West * (see patch 1827829) (DG); * 17-Jun-2008 : Apply legend font and paint attributes (DG); * 19-Jun-2008 : Added findRangeBounds() method override to fix bug in default * axis range (DG); * 24-Jun-2008 : Added new barPainter mechanism (DG); * 03-Feb-2009 : Added defaultShadowsVisible flag (DG); * 05-Feb-2009 : Added barAlignmentFactor (DG); * 10-May-2012 : Fix findDomainBounds() and findRangeBounds() to account for * non-visible series (DG); * 03-Jul-2013 : Use ParamChecks (DG); * */ package org.jfree.chart.renderer.xy; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Paint; import java.awt.Shape; import java.awt.Stroke; import java.awt.geom.Point2D; 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.LegendItem; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.entity.EntityCollection; import org.jfree.chart.event.RendererChangeEvent; import org.jfree.chart.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.labels.XYItemLabelGenerator; import org.jfree.chart.labels.XYSeriesLabelGenerator; 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.util.ParamChecks; import org.jfree.data.Range; import org.jfree.data.xy.IntervalXYDataset; import org.jfree.data.xy.XYDataset; import org.jfree.io.SerialUtilities; import org.jfree.text.TextUtilities; import org.jfree.ui.GradientPaintTransformer; import org.jfree.ui.RectangleEdge; import org.jfree.ui.StandardGradientPaintTransformer; import org.jfree.util.ObjectUtilities; import org.jfree.util.PublicCloneable; import org.jfree.util.ShapeUtilities; /** * A renderer that draws bars on an {@link XYPlot} (requires an * {@link IntervalXYDataset}). The example shown here is generated by the * <code>XYBarChartDemo1.java</code> program included in the JFreeChart * demo collection: * <br><br> * <img src="../../../../../images/XYBarRendererSample.png" * alt="XYBarRendererSample.png"> */ public class XYBarRenderer extends AbstractXYItemRenderer implements XYItemRenderer, Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = 770559577251370036L; /** * The default bar painter assigned to each new instance of this renderer. * * @since 1.0.11 */ private static XYBarPainter defaultBarPainter = new GradientXYBarPainter(); /** * Returns the default bar painter. * * @return The default bar painter. * * @since 1.0.11 */ public static XYBarPainter getDefaultBarPainter() { return XYBarRenderer.defaultBarPainter; } /** * Sets the default bar painter. * * @param painter the painter (<code>null</code> not permitted). * * @since 1.0.11 */ public static void setDefaultBarPainter(XYBarPainter painter) { ParamChecks.nullNotPermitted(painter, "painter"); XYBarRenderer.defaultBarPainter = painter; } /** * The default value for the initialisation of the shadowsVisible flag. */ private static boolean defaultShadowsVisible = true; /** * Returns the default value for the <code>shadowsVisible</code> flag. * * @return A boolean. * * @see #setDefaultShadowsVisible(boolean) * * @since 1.0.13 */ public static boolean getDefaultShadowsVisible() { return XYBarRenderer.defaultShadowsVisible; } /** * Sets the default value for the shadows visible flag. * * @param visible the new value for the default. * * @see #getDefaultShadowsVisible() * * @since 1.0.13 */ public static void setDefaultShadowsVisible(boolean visible) { XYBarRenderer.defaultShadowsVisible = visible; } /** * The state class used by this renderer. */ protected class XYBarRendererState extends XYItemRendererState { /** Base for bars against the range axis, in Java 2D space. */ private double g2Base; /** * Creates a new state object. * * @param info the plot rendering info. */ public XYBarRendererState(PlotRenderingInfo info) { super(info); } /** * Returns the base (range) value in Java 2D space. * * @return The base value. */ public double getG2Base() { return this.g2Base; } /** * Sets the range axis base in Java2D space. * * @param value the value. */ public void setG2Base(double value) { this.g2Base = value; } } /** The default base value for the bars. */ private double base; /** * A flag that controls whether the bars use the y-interval supplied by the * dataset. */ private boolean useYInterval; /** Percentage margin (to reduce the width of bars). */ private double margin; /** A flag that controls whether or not bar outlines are drawn. */ private boolean drawBarOutline; /** * An optional class used to transform gradient paint objects to fit each * bar. */ private GradientPaintTransformer gradientPaintTransformer; /** * The shape used to represent a bar in each legend item (this should never * be <code>null</code>). */ private transient Shape legendBar; /** * The fallback position if a positive item label doesn't fit inside the * bar. */ private ItemLabelPosition positiveItemLabelPositionFallback; /** * The fallback position if a negative item label doesn't fit inside the * bar. */ private ItemLabelPosition negativeItemLabelPositionFallback; /** * The bar painter (never <code>null</code>). * * @since 1.0.11 */ private XYBarPainter barPainter; /** * The flag that controls whether or not shadows are drawn for the bars. * * @since 1.0.11 */ private boolean shadowsVisible; /** * The x-offset for the shadow effect. * * @since 1.0.11 */ private double shadowXOffset; /** * The y-offset for the shadow effect. * * @since 1.0.11 */ private double shadowYOffset; /** * A factor used to align the bars about the x-value. * * @since 1.0.13 */ private double barAlignmentFactor; /** * The default constructor. */ public XYBarRenderer() { this(0.0); } /** * Constructs a new renderer. * * @param margin the percentage amount to trim from the width of each bar. */ public XYBarRenderer(double margin) { super(); this.margin = margin; this.base = 0.0; this.useYInterval = false; this.gradientPaintTransformer = new StandardGradientPaintTransformer(); this.drawBarOutline = false; this.legendBar = new Rectangle2D.Double(-3.0, -5.0, 6.0, 10.0); this.barPainter = getDefaultBarPainter(); this.shadowsVisible = getDefaultShadowsVisible(); this.shadowXOffset = 4.0; this.shadowYOffset = 4.0; this.barAlignmentFactor = -1.0; } /** * Returns the base value for the bars. * * @return The base value for the bars. * * @see #setBase(double) */ public double getBase() { return this.base; } /** * Sets the base value for the bars and sends a {@link RendererChangeEvent} * to all registered listeners. The base value is not used if the dataset's * y-interval is being used to determine the bar length. * * @param base the new base value. * * @see #getBase() * @see #getUseYInterval() */ public void setBase(double base) { this.base = base; fireChangeEvent(); } /** * Returns a flag that determines whether the y-interval from the dataset is * used to calculate the length of each bar. * * @return A boolean. * * @see #setUseYInterval(boolean) */ public boolean getUseYInterval() { return this.useYInterval; } /** * Sets the flag that determines whether the y-interval from the dataset is * used to calculate the length of each bar, and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param use the flag. * * @see #getUseYInterval() */ public void setUseYInterval(boolean use) { if (this.useYInterval != use) { this.useYInterval = use; fireChangeEvent(); } } /** * Returns the margin which is a percentage amount by which the bars are * trimmed. * * @return The margin. * * @see #setMargin(double) */ public double getMargin() { return this.margin; } /** * Sets the percentage amount by which the bars are trimmed and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param margin the new margin. * * @see #getMargin() */ public void setMargin(double margin) { this.margin = margin; fireChangeEvent(); } /** * Returns a flag that controls whether or not bar outlines are drawn. * * @return A boolean. * * @see #setDrawBarOutline(boolean) */ public boolean isDrawBarOutline() { return this.drawBarOutline; } /** * Sets the flag that controls whether or not bar outlines are drawn and * sends a {@link RendererChangeEvent} to all registered listeners. * * @param draw the flag. * * @see #isDrawBarOutline() */ public void setDrawBarOutline(boolean draw) { this.drawBarOutline = draw; fireChangeEvent(); } /** * Returns the gradient paint transformer (an object used to transform * gradient paint objects to fit each bar). * * @return A transformer (<code>null</code> possible). * * @see #setGradientPaintTransformer(GradientPaintTransformer) */ public GradientPaintTransformer getGradientPaintTransformer() { return this.gradientPaintTransformer; } /** * Sets the gradient paint transformer and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param transformer the transformer (<code>null</code> permitted). * * @see #getGradientPaintTransformer() */ public void setGradientPaintTransformer(GradientPaintTransformer transformer) { this.gradientPaintTransformer = transformer; fireChangeEvent(); } /** * Returns the shape used to represent bars in each legend item. * * @return The shape used to represent bars in each legend item (never * <code>null</code>). * * @see #setLegendBar(Shape) */ public Shape getLegendBar() { return this.legendBar; } /** * Sets the shape used to represent bars in each legend item and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param bar the bar shape (<code>null</code> not permitted). * * @see #getLegendBar() */ public void setLegendBar(Shape bar) { ParamChecks.nullNotPermitted(bar, "bar"); this.legendBar = bar; fireChangeEvent(); } /** * Returns the fallback position for positive item labels that don't fit * within a bar. * * @return The fallback position (<code>null</code> possible). * * @see #setPositiveItemLabelPositionFallback(ItemLabelPosition) * @since 1.0.2 */ public ItemLabelPosition getPositiveItemLabelPositionFallback() { return this.positiveItemLabelPositionFallback; } /** * Sets the fallback position for positive item labels that don't fit * within a bar, and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param position the position (<code>null</code> permitted). * * @see #getPositiveItemLabelPositionFallback() * @since 1.0.2 */ public void setPositiveItemLabelPositionFallback(ItemLabelPosition position) { this.positiveItemLabelPositionFallback = position; fireChangeEvent(); } /** * Returns the fallback position for negative item labels that don't fit * within a bar. * * @return The fallback position (<code>null</code> possible). * * @see #setNegativeItemLabelPositionFallback(ItemLabelPosition) * @since 1.0.2 */ public ItemLabelPosition getNegativeItemLabelPositionFallback() { return this.negativeItemLabelPositionFallback; } /** * Sets the fallback position for negative item labels that don't fit * within a bar, and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param position the position (<code>null</code> permitted). * * @see #getNegativeItemLabelPositionFallback() * @since 1.0.2 */ public void setNegativeItemLabelPositionFallback(ItemLabelPosition position) { this.negativeItemLabelPositionFallback = position; fireChangeEvent(); } /** * Returns the bar painter. * * @return The bar painter (never <code>null</code>). * * @since 1.0.11 */ public XYBarPainter getBarPainter() { return this.barPainter; } /** * Sets the bar painter and sends a {@link RendererChangeEvent} to all * registered listeners. * * @param painter the painter (<code>null</code> not permitted). * * @since 1.0.11 */ public void setBarPainter(XYBarPainter painter) { ParamChecks.nullNotPermitted(painter, "painter"); this.barPainter = painter; fireChangeEvent(); } /** * Returns the flag that controls whether or not shadows are drawn for * the bars. * * @return A boolean. * * @since 1.0.11 */ public boolean getShadowsVisible() { return this.shadowsVisible; } /** * Sets the flag that controls whether or not the renderer * draws shadows for the bars, and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param visible the new flag value. * * @since 1.0.11 */ public void setShadowVisible(boolean visible) { this.shadowsVisible = visible; fireChangeEvent(); } /** * Returns the shadow x-offset. * * @return The shadow x-offset. * * @since 1.0.11 */ public double getShadowXOffset() { return this.shadowXOffset; } /** * Sets the x-offset for the bar shadow and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param offset the offset. * * @since 1.0.11 */ public void setShadowXOffset(double offset) { this.shadowXOffset = offset; fireChangeEvent(); } /** * Returns the shadow y-offset. * * @return The shadow y-offset. * * @since 1.0.11 */ public double getShadowYOffset() { return this.shadowYOffset; } /** * Sets the y-offset for the bar shadow and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param offset the offset. * * @since 1.0.11 */ public void setShadowYOffset(double offset) { this.shadowYOffset = offset; fireChangeEvent(); } /** * Returns the bar alignment factor. * * @return The bar alignment factor. * * @since 1.0.13 */ public double getBarAlignmentFactor() { return this.barAlignmentFactor; } /** * Sets the bar alignment factor and sends a {@link RendererChangeEvent} * to all registered listeners. If the alignment factor is outside the * range 0.0 to 1.0, no alignment will be performed by the renderer. * * @param factor the factor. * * @since 1.0.13 */ public void setBarAlignmentFactor(double factor) { this.barAlignmentFactor = factor; fireChangeEvent(); } /** * Initialises the renderer and returns a state object that should be * passed to all subsequent calls to the drawItem() method. Here we * calculate the Java2D y-coordinate for zero, since all the bars have * their bases fixed at zero. * * @param g2 the graphics device. * @param dataArea the area inside the axes. * @param plot the plot. * @param dataset the data. * @param info an optional info collection object to return data back to * the caller. * * @return A state object. */ @Override public XYItemRendererState initialise(Graphics2D g2, Rectangle2D dataArea, XYPlot plot, XYDataset dataset, PlotRenderingInfo info) { XYBarRendererState state = new XYBarRendererState(info); ValueAxis rangeAxis = plot.getRangeAxisForDataset(plot.indexOf(dataset)); state.setG2Base(rangeAxis.valueToJava2D(this.base, dataArea, plot.getRangeAxisEdge())); return state; } /** * Returns a default legend item for the specified series. Subclasses * should override this method to generate customised items. * * @param datasetIndex the dataset index (zero-based). * @param series the series index (zero-based). * * @return A legend item for the series. */ @Override public LegendItem getLegendItem(int datasetIndex, int series) { XYPlot xyplot = getPlot(); if (xyplot == null) { return null; } XYDataset dataset = xyplot.getDataset(datasetIndex); if (dataset == null) { return null; } LegendItem result; XYSeriesLabelGenerator lg = getLegendItemLabelGenerator(); String label = lg.generateLabel(dataset, series); String description = label; String toolTipText = null; if (getLegendItemToolTipGenerator() != null) { toolTipText = getLegendItemToolTipGenerator().generateLabel(dataset, series); } String urlText = null; if (getLegendItemURLGenerator() != null) { urlText = getLegendItemURLGenerator().generateLabel(dataset, series); } Shape shape = this.legendBar; Paint paint = lookupSeriesPaint(series); Paint outlinePaint = lookupSeriesOutlinePaint(series); Stroke outlineStroke = lookupSeriesOutlineStroke(series); if (this.drawBarOutline) { result = new LegendItem(label, description, toolTipText, urlText, shape, paint, outlineStroke, outlinePaint); } else { result = new LegendItem(label, description, toolTipText, urlText, shape, paint); } result.setLabelFont(lookupLegendTextFont(series)); Paint labelPaint = lookupLegendTextPaint(series); if (labelPaint != null) { result.setLabelPaint(labelPaint); } result.setDataset(dataset); result.setDatasetIndex(datasetIndex); result.setSeriesKey(dataset.getSeriesKey(series)); result.setSeriesIndex(series); if (getGradientPaintTransformer() != null) { result.setFillPaintTransformer(getGradientPaintTransformer()); } return result; } /** * 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</code> 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) { if (!getItemVisible(series, item)) { return; } IntervalXYDataset intervalDataset = (IntervalXYDataset) dataset; double value0; double value1; if (this.useYInterval) { value0 = intervalDataset.getStartYValue(series, item); value1 = intervalDataset.getEndYValue(series, item); } else { value0 = this.base; value1 = intervalDataset.getYValue(series, item); } if (Double.isNaN(value0) || Double.isNaN(value1)) { return; } if (value0 <= value1) { if (!rangeAxis.getRange().intersects(value0, value1)) { return; } } else { if (!rangeAxis.getRange().intersects(value1, value0)) { return; } } double translatedValue0 = rangeAxis.valueToJava2D(value0, dataArea, plot.getRangeAxisEdge()); double translatedValue1 = rangeAxis.valueToJava2D(value1, dataArea, plot.getRangeAxisEdge()); double bottom = Math.min(translatedValue0, translatedValue1); double top = Math.max(translatedValue0, translatedValue1); double startX = intervalDataset.getStartXValue(series, item); if (Double.isNaN(startX)) { return; } double endX = intervalDataset.getEndXValue(series, item); if (Double.isNaN(endX)) { return; } if (startX <= endX) { if (!domainAxis.getRange().intersects(startX, endX)) { return; } } else { if (!domainAxis.getRange().intersects(endX, startX)) { return; } } // is there an alignment adjustment to be made? if (this.barAlignmentFactor >= 0.0 && this.barAlignmentFactor <= 1.0) { double x = intervalDataset.getXValue(series, item); double interval = endX - startX; startX = x - interval * this.barAlignmentFactor; endX = startX + interval; } RectangleEdge location = plot.getDomainAxisEdge(); double translatedStartX = domainAxis.valueToJava2D(startX, dataArea, location); double translatedEndX = domainAxis.valueToJava2D(endX, dataArea, location); double translatedWidth = Math.max(1, Math.abs(translatedEndX - translatedStartX)); double left = Math.min(translatedStartX, translatedEndX); if (getMargin() > 0.0) { double cut = translatedWidth * getMargin(); translatedWidth = translatedWidth - cut; left = left + cut / 2; } Rectangle2D bar = null; PlotOrientation orientation = plot.getOrientation(); if (orientation == PlotOrientation.HORIZONTAL) { // clip left and right bounds to data area bottom = Math.max(bottom, dataArea.getMinX()); top = Math.min(top, dataArea.getMaxX()); bar = new Rectangle2D.Double(bottom, left, top - bottom, translatedWidth); } else if (orientation == PlotOrientation.VERTICAL) { // clip top and bottom bounds to data area bottom = Math.max(bottom, dataArea.getMinY()); top = Math.min(top, dataArea.getMaxY()); bar = new Rectangle2D.Double(left, bottom, translatedWidth, top - bottom); } boolean positive = (value1 > 0.0); boolean inverted = rangeAxis.isInverted(); RectangleEdge barBase; if (orientation == PlotOrientation.HORIZONTAL) { if (positive && inverted || !positive && !inverted) { barBase = RectangleEdge.RIGHT; } else { barBase = RectangleEdge.LEFT; } } else { if (positive && !inverted || !positive && inverted) { barBase = RectangleEdge.BOTTOM; } else { barBase = RectangleEdge.TOP; } } if (getShadowsVisible()) { this.barPainter.paintBarShadow(g2, this, series, item, bar, barBase, !this.useYInterval); } this.barPainter.paintBar(g2, this, series, item, bar, barBase); if (isItemLabelVisible(series, item)) { XYItemLabelGenerator generator = getItemLabelGenerator(series, item); drawItemLabel(g2, dataset, series, item, plot, generator, bar, value1 < 0.0); } // update the crosshair point double x1 = (startX + endX) / 2.0; double y1 = dataset.getYValue(series, item); double transX1 = domainAxis.valueToJava2D(x1, dataArea, location); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, plot.getRangeAxisEdge()); int domainAxisIndex = plot.getDomainAxisIndex(domainAxis); int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis); updateCrosshairValues(crosshairState, x1, y1, domainAxisIndex, rangeAxisIndex, transX1, transY1, plot.getOrientation()); EntityCollection entities = state.getEntityCollection(); if (entities != null) { addEntity(entities, bar, dataset, series, item, 0.0, 0.0); } } /** * Draws an item label. This method is provided as an alternative to * {@link #drawItemLabel(Graphics2D, PlotOrientation, XYDataset, int, int, * double, double, boolean)} so that the bar can be used to calculate the * label anchor point. * * @param g2 the graphics device. * @param dataset the dataset. * @param series the series index. * @param item the item index. * @param plot the plot. * @param generator the label generator (<code>null</code> permitted, in * which case the method does nothing, just returns). * @param bar the bar. * @param negative a flag indicating a negative value. */ protected void drawItemLabel(Graphics2D g2, XYDataset dataset, int series, int item, XYPlot plot, XYItemLabelGenerator generator, Rectangle2D bar, boolean negative) { if (generator == null) { return; // nothing to do } String label = generator.generateLabel(dataset, series, item); if (label == null) { return; // nothing to do } Font labelFont = getItemLabelFont(series, item); g2.setFont(labelFont); Paint paint = getItemLabelPaint(series, item); g2.setPaint(paint); // find out where to place the label... ItemLabelPosition position; if (!negative) { position = getPositiveItemLabelPosition(series, item); } else { position = getNegativeItemLabelPosition(series, item); } // work out the label anchor point... Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar, plot.getOrientation()); if (isInternalAnchor(position.getItemLabelAnchor())) { Shape bounds = TextUtilities.calculateRotatedStringBounds(label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(), position.getTextAnchor(), position.getAngle(), position.getRotationAnchor()); if (bounds != null) { if (!bar.contains(bounds.getBounds2D())) { if (!negative) { position = getPositiveItemLabelPositionFallback(); } else { position = getNegativeItemLabelPositionFallback(); } if (position != null) { anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar, plot.getOrientation()); } } } } if (position != null) { TextUtilities.drawRotatedString(label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(), position.getTextAnchor(), position.getAngle(), position.getRotationAnchor()); } } /** * Calculates the item label anchor point. * * @param anchor the anchor. * @param bar the bar. * @param orientation the plot orientation. * * @return The anchor point. */ private Point2D calculateLabelAnchorPoint(ItemLabelAnchor anchor, Rectangle2D bar, PlotOrientation orientation) { Point2D result = null; double offset = getItemLabelAnchorOffset(); double x0 = bar.getX() - offset; double x1 = bar.getX(); double x2 = bar.getX() + offset; double x3 = bar.getCenterX(); double x4 = bar.getMaxX() - offset; double x5 = bar.getMaxX(); double x6 = bar.getMaxX() + offset; double y0 = bar.getMaxY() + offset; double y1 = bar.getMaxY(); double y2 = bar.getMaxY() - offset; double y3 = bar.getCenterY(); double y4 = bar.getMinY() + offset; double y5 = bar.getMinY(); double y6 = bar.getMinY() - offset; if (anchor == ItemLabelAnchor.CENTER) { result = new Point2D.Double(x3, y3); } else if (anchor == ItemLabelAnchor.INSIDE1) { result = new Point2D.Double(x4, y4); } else if (anchor == ItemLabelAnchor.INSIDE2) { result = new Point2D.Double(x4, y4); } else if (anchor == ItemLabelAnchor.INSIDE3) { result = new Point2D.Double(x4, y3); } else if (anchor == ItemLabelAnchor.INSIDE4) { result = new Point2D.Double(x4, y2); } else if (anchor == ItemLabelAnchor.INSIDE5) { result = new Point2D.Double(x4, y2); } else if (anchor == ItemLabelAnchor.INSIDE6) { result = new Point2D.Double(x3, y2); } else if (anchor == ItemLabelAnchor.INSIDE7) { result = new Point2D.Double(x2, y2); } else if (anchor == ItemLabelAnchor.INSIDE8) { result = new Point2D.Double(x2, y2); } else if (anchor == ItemLabelAnchor.INSIDE9) { result = new Point2D.Double(x2, y3); } else if (anchor == ItemLabelAnchor.INSIDE10) { result = new Point2D.Double(x2, y4); } else if (anchor == ItemLabelAnchor.INSIDE11) { result = new Point2D.Double(x2, y4); } else if (anchor == ItemLabelAnchor.INSIDE12) { result = new Point2D.Double(x3, y4); } else if (anchor == ItemLabelAnchor.OUTSIDE1) { result = new Point2D.Double(x5, y6); } else if (anchor == ItemLabelAnchor.OUTSIDE2) { result = new Point2D.Double(x6, y5); } else if (anchor == ItemLabelAnchor.OUTSIDE3) { result = new Point2D.Double(x6, y3); } else if (anchor == ItemLabelAnchor.OUTSIDE4) { result = new Point2D.Double(x6, y1); } else if (anchor == ItemLabelAnchor.OUTSIDE5) { result = new Point2D.Double(x5, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE6) { result = new Point2D.Double(x3, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE7) { result = new Point2D.Double(x1, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE8) { result = new Point2D.Double(x0, y1); } else if (anchor == ItemLabelAnchor.OUTSIDE9) { result = new Point2D.Double(x0, y3); } else if (anchor == ItemLabelAnchor.OUTSIDE10) { result = new Point2D.Double(x0, y5); } else if (anchor == ItemLabelAnchor.OUTSIDE11) { result = new Point2D.Double(x1, y6); } else if (anchor == ItemLabelAnchor.OUTSIDE12) { result = new Point2D.Double(x3, y6); } return result; } /** * Returns <code>true</code> if the specified anchor point is inside a bar. * * @param anchor the anchor point. * * @return A boolean. */ private boolean isInternalAnchor(ItemLabelAnchor anchor) { return anchor == ItemLabelAnchor.CENTER || anchor == ItemLabelAnchor.INSIDE1 || anchor == ItemLabelAnchor.INSIDE2 || anchor == ItemLabelAnchor.INSIDE3 || anchor == ItemLabelAnchor.INSIDE4 || anchor == ItemLabelAnchor.INSIDE5 || anchor == ItemLabelAnchor.INSIDE6 || anchor == ItemLabelAnchor.INSIDE7 || anchor == ItemLabelAnchor.INSIDE8 || anchor == ItemLabelAnchor.INSIDE9 || anchor == ItemLabelAnchor.INSIDE10 || anchor == ItemLabelAnchor.INSIDE11 || anchor == ItemLabelAnchor.INSIDE12; } /** * Returns the lower and upper bounds (range) of the x-values in the * specified dataset. Since this renderer uses the x-interval in the * dataset, this is taken into account for the range. * * @param dataset the dataset (<code>null</code> permitted). * * @return The range (<code>null</code> if the dataset is * <code>null</code> or empty). */ @Override public Range findDomainBounds(XYDataset dataset) { return findDomainBounds(dataset, true); } /** * Returns the lower and upper bounds (range) of the y-values in the * specified dataset. If the renderer is plotting the y-interval from the * dataset, this is taken into account for the range. * * @param dataset the dataset (<code>null</code> permitted). * * @return The range (<code>null</code> if the dataset is * <code>null</code> or empty). */ @Override public Range findRangeBounds(XYDataset dataset) { return findRangeBounds(dataset, this.useYInterval); } /** * Returns a clone of the renderer. * * @return A clone. * * @throws CloneNotSupportedException if the renderer cannot be cloned. */ @Override public Object clone() throws CloneNotSupportedException { XYBarRenderer result = (XYBarRenderer) super.clone(); if (this.gradientPaintTransformer != null) { result.gradientPaintTransformer = (GradientPaintTransformer) ObjectUtilities .clone(this.gradientPaintTransformer); } result.legendBar = ShapeUtilities.clone(this.legendBar); return result; } /** * Tests this renderer for equality with an arbitrary object. * * @param obj the object to test against (<code>null</code> permitted). * * @return A boolean. */ @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof XYBarRenderer)) { return false; } XYBarRenderer that = (XYBarRenderer) obj; if (this.base != that.base) { return false; } if (this.drawBarOutline != that.drawBarOutline) { return false; } if (this.margin != that.margin) { return false; } if (this.useYInterval != that.useYInterval) { return false; } if (!ObjectUtilities.equal(this.gradientPaintTransformer, that.gradientPaintTransformer)) { return false; } if (!ShapeUtilities.equal(this.legendBar, that.legendBar)) { return false; } if (!ObjectUtilities.equal(this.positiveItemLabelPositionFallback, that.positiveItemLabelPositionFallback)) { return false; } if (!ObjectUtilities.equal(this.negativeItemLabelPositionFallback, that.negativeItemLabelPositionFallback)) { return false; } if (!this.barPainter.equals(that.barPainter)) { return false; } if (this.shadowsVisible != that.shadowsVisible) { return false; } if (this.shadowXOffset != that.shadowXOffset) { return false; } if (this.shadowYOffset != that.shadowYOffset) { return false; } if (this.barAlignmentFactor != that.barAlignmentFactor) { return false; } return super.equals(obj); } /** * 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.legendBar = SerialUtilities.readShape(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(); SerialUtilities.writeShape(this.legendBar, stream); } }