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JFreeChart is a class library, written in Java, for generating charts. Utilising the Java2D APIs, it currently supports bar charts, pie charts, line charts, XY-plots and time series plots.

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/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2013, 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.]
 *
 * ---------------------------
 * StandardXYItemRenderer.java
 * ---------------------------
 * (C) Copyright 2001-2013, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Mark Watson (www.markwatson.com);
 *                   Jonathan Nash;
 *                   Andreas Schneider;
 *                   Norbert Kiesel (for TBD Networks);
 *                   Christian W. Zuckschwerdt;
 *                   Bill Kelemen;
 *                   Nicolas Brodu (for Astrium and EADS Corporate Research
 *                   Center);
 *
 * Changes:
 * --------
 * 19-Oct-2001 : Version 1, based on code by Mark Watson (DG);
 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
 * 21-Dec-2001 : Added working line instance to improve performance (DG);
 * 22-Jan-2002 : Added code to lock crosshairs to data points.  Based on code
 *               by Jonathan Nash (DG);
 * 23-Jan-2002 : Added DrawInfo parameter to drawItem() method (DG);
 * 28-Mar-2002 : Added a property change listener mechanism so that the
 *               renderer no longer needs to be immutable (DG);
 * 02-Apr-2002 : Modified to handle null values (DG);
 * 09-Apr-2002 : Modified draw method to return void.  Removed the translated
 *               zero from the drawItem method.  Override the initialise()
 *               method to calculate it (DG);
 * 13-May-2002 : Added code from Andreas Schneider to allow changing
 *               shapes/colors per item (DG);
 * 24-May-2002 : Incorporated tooltips into chart entities (DG);
 * 25-Jun-2002 : Removed redundant code (DG);
 * 05-Aug-2002 : Incorporated URLs for HTML image maps into chart entities (RA);
 * 08-Aug-2002 : Added discontinuous lines option contributed by
 *               Norbert Kiesel (DG);
 * 20-Aug-2002 : Added user definable default values to be returned by
 *               protected methods unless overridden by a subclass (DG);
 * 23-Sep-2002 : Updated for changes in the XYItemRenderer interface (DG);
 * 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 25-Mar-2003 : Implemented Serializable (DG);
 * 01-May-2003 : Modified drawItem() method signature (DG);
 * 15-May-2003 : Modified to take into account the plot orientation (DG);
 * 29-Jul-2003 : Amended code that doesn't compile with JDK 1.2.2 (DG);
 * 30-Jul-2003 : Modified entity constructor (CZ);
 * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
 * 24-Aug-2003 : Added null/NaN checks in drawItem (BK);
 * 08-Sep-2003 : Fixed serialization (NB);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 21-Jan-2004 : Override for getLegendItem() method (DG);
 * 27-Jan-2004 : Moved working line into state object (DG);
 * 10-Feb-2004 : Changed drawItem() method to make cut-and-paste overriding
 *               easier (DG);
 * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState.  Renamed
 *               XYToolTipGenerator --> XYItemLabelGenerator (DG);
 * 08-Jun-2004 : Modified to use getX() and getY() methods (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * 25-Aug-2004 : Created addEntity() method in superclass (DG);
 * 08-Oct-2004 : Added 'gapThresholdType' as suggested by Mike Watts (DG);
 * 11-Nov-2004 : Now uses ShapeUtilities to translate shapes (DG);
 * 23-Feb-2005 : Fixed getLegendItem() method to show lines.  Fixed bug
 *               1077108 (shape not visible for first item in series) (DG);
 * 10-Apr-2005 : Fixed item label positioning with horizontal orientation (DG);
 * 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
 * 27-Apr-2005 : Use generator for series label in legend (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 15-Jun-2006 : Fixed bug (1380480) for rendering series as path (DG);
 * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG);
 * 14-Mar-2007 : Fixed problems with the equals() and clone() methods (DG);
 * 23-Mar-2007 : Clean-up of shapesFilled attributes (DG);
 * 20-Apr-2007 : Updated getLegendItem() and drawItem() for renderer
 *               change (DG);
 * 17-May-2007 : Set datasetIndex and seriesIndex in getLegendItem()
 *               method (DG);
 * 18-May-2007 : Set dataset and seriesKey for LegendItem (DG);
 * 08-Jun-2007 : Fixed bug in entity creation (DG);
 * 21-Nov-2007 : Deprecated override flag methods (DG);
 * 02-Jun-2008 : Fixed tooltips for data items at lower edges of data area (DG);
 * 17-Jun-2008 : Apply legend shape, font and paint attributes (DG);
 * 03-Jul-2013 : Use ParamChecks (DG);
 *
 */

package org.jfree.chart.renderer.xy;

import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Paint;
import java.awt.Point;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.GeneralPath;
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.LegendItem;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.labels.XYToolTipGenerator;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.urls.XYURLGenerator;
import org.jfree.chart.util.ParamChecks;
import org.jfree.data.xy.XYDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.BooleanList;
import org.jfree.util.BooleanUtilities;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;
import org.jfree.util.UnitType;

/**
 * Standard item renderer for an {@link XYPlot}.  This class can draw (a)
 * shapes at each point, or (b) lines between points, or (c) both shapes and
 * lines.
 * 

* This renderer has been retained for historical reasons and, in general, you * should use the {@link XYLineAndShapeRenderer} class instead. */ public class StandardXYItemRenderer extends AbstractXYItemRenderer implements XYItemRenderer, Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = -3271351259436865995L; /** Constant for the type of rendering (shapes only). */ public static final int SHAPES = 1; /** Constant for the type of rendering (lines only). */ public static final int LINES = 2; /** Constant for the type of rendering (shapes and lines). */ public static final int SHAPES_AND_LINES = SHAPES | LINES; /** Constant for the type of rendering (images only). */ public static final int IMAGES = 4; /** Constant for the type of rendering (discontinuous lines). */ public static final int DISCONTINUOUS = 8; /** Constant for the type of rendering (discontinuous lines). */ public static final int DISCONTINUOUS_LINES = LINES | DISCONTINUOUS; /** A flag indicating whether or not shapes are drawn at each XY point. */ private boolean baseShapesVisible; /** A flag indicating whether or not lines are drawn between XY points. */ private boolean plotLines; /** A flag indicating whether or not images are drawn between XY points. */ private boolean plotImages; /** A flag controlling whether or not discontinuous lines are used. */ private boolean plotDiscontinuous; /** Specifies how the gap threshold value is interpreted. */ private UnitType gapThresholdType = UnitType.RELATIVE; /** Threshold for deciding when to discontinue a line. */ private double gapThreshold = 1.0; /** * A flag that controls whether or not shapes are filled for ALL series. * * @deprecated As of 1.0.8, this override should not be used. */ private Boolean shapesFilled; /** * A table of flags that control (per series) whether or not shapes are * filled. */ private BooleanList seriesShapesFilled; /** The default value returned by the getShapeFilled() method. */ private boolean baseShapesFilled; /** * A flag that controls whether or not each series is drawn as a single * path. */ private boolean drawSeriesLineAsPath; /** * The shape that is used to represent a line in the legend. * This should never be set to null. */ private transient Shape legendLine; /** * Constructs a new renderer. */ public StandardXYItemRenderer() { this(LINES, null); } /** * Constructs a new renderer. To specify the type of renderer, use one of * the constants: {@link #SHAPES}, {@link #LINES} or * {@link #SHAPES_AND_LINES}. * * @param type the type. */ public StandardXYItemRenderer(int type) { this(type, null); } /** * Constructs a new renderer. To specify the type of renderer, use one of * the constants: {@link #SHAPES}, {@link #LINES} or * {@link #SHAPES_AND_LINES}. * * @param type the type of renderer. * @param toolTipGenerator the item label generator (null * permitted). */ public StandardXYItemRenderer(int type, XYToolTipGenerator toolTipGenerator) { this(type, toolTipGenerator, null); } /** * Constructs a new renderer. To specify the type of renderer, use one of * the constants: {@link #SHAPES}, {@link #LINES} or * {@link #SHAPES_AND_LINES}. * * @param type the type of renderer. * @param toolTipGenerator the item label generator (null * permitted). * @param urlGenerator the URL generator. */ public StandardXYItemRenderer(int type, XYToolTipGenerator toolTipGenerator, XYURLGenerator urlGenerator) { super(); setBaseToolTipGenerator(toolTipGenerator); setURLGenerator(urlGenerator); if ((type & SHAPES) != 0) { this.baseShapesVisible = true; } if ((type & LINES) != 0) { this.plotLines = true; } if ((type & IMAGES) != 0) { this.plotImages = true; } if ((type & DISCONTINUOUS) != 0) { this.plotDiscontinuous = true; } this.shapesFilled = null; this.seriesShapesFilled = new BooleanList(); this.baseShapesFilled = true; this.legendLine = new Line2D.Double(-7.0, 0.0, 7.0, 0.0); this.drawSeriesLineAsPath = false; } /** * Returns true if shapes are being plotted by the renderer. * * @return true if shapes are being plotted by the renderer. * * @see #setBaseShapesVisible */ public boolean getBaseShapesVisible() { return this.baseShapesVisible; } /** * Sets the flag that controls whether or not a shape is plotted at each * data point. * * @param flag the flag. * * @see #getBaseShapesVisible */ public void setBaseShapesVisible(boolean flag) { if (this.baseShapesVisible != flag) { this.baseShapesVisible = flag; fireChangeEvent(); } } // SHAPES FILLED /** * Returns the flag used to control whether or not the shape for an item is * filled. *

* The default implementation passes control to the * getSeriesShapesFilled method. You can override this method * if you require different behaviour. * * @param series the series index (zero-based). * @param item the item index (zero-based). * * @return A boolean. * * @see #getSeriesShapesFilled(int) */ public boolean getItemShapeFilled(int series, int item) { // return the overall setting, if there is one... if (this.shapesFilled != null) { return this.shapesFilled.booleanValue(); } // otherwise look up the paint table Boolean flag = this.seriesShapesFilled.getBoolean(series); if (flag != null) { return flag.booleanValue(); } else { return this.baseShapesFilled; } } /** * Returns the override flag that controls whether or not shapes are filled * for ALL series. * * @return The flag (possibly null). * * @since 1.0.5 * * @deprecated As of 1.0.8, you should avoid using this method and rely * on just the per-series ({@link #getSeriesShapesFilled(int)}) * and base-level ({@link #getBaseShapesFilled()}) settings. */ public Boolean getShapesFilled() { return this.shapesFilled; } /** * Sets the override flag that controls whether or not shapes are filled * for ALL series and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param filled the flag. * * @see #setShapesFilled(Boolean) * * @deprecated As of 1.0.8, you should avoid using this method and rely * on just the per-series ({@link #setSeriesShapesFilled(int, * Boolean)}) and base-level ({@link #setBaseShapesVisible( * boolean)}) settings. */ public void setShapesFilled(boolean filled) { // here we use BooleanUtilities to remain compatible with JDKs < 1.4 setShapesFilled(BooleanUtilities.valueOf(filled)); } /** * Sets the override flag that controls whether or not shapes are filled * for ALL series and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param filled the flag (null permitted). * * @see #setShapesFilled(boolean) * * @deprecated As of 1.0.8, you should avoid using this method and rely * on just the per-series ({@link #setSeriesShapesFilled(int, * Boolean)}) and base-level ({@link #setBaseShapesVisible( * boolean)}) settings. */ public void setShapesFilled(Boolean filled) { this.shapesFilled = filled; fireChangeEvent(); } /** * Returns the flag used to control whether or not the shapes for a series * are filled. * * @param series the series index (zero-based). * * @return A boolean. */ public Boolean getSeriesShapesFilled(int series) { return this.seriesShapesFilled.getBoolean(series); } /** * Sets the 'shapes filled' flag for a series and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param series the series index (zero-based). * @param flag the flag. * * @see #getSeriesShapesFilled(int) */ public void setSeriesShapesFilled(int series, Boolean flag) { this.seriesShapesFilled.setBoolean(series, flag); fireChangeEvent(); } /** * Returns the base 'shape filled' attribute. * * @return The base flag. * * @see #setBaseShapesFilled(boolean) */ public boolean getBaseShapesFilled() { return this.baseShapesFilled; } /** * Sets the base 'shapes filled' flag and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param flag the flag. * * @see #getBaseShapesFilled() */ public void setBaseShapesFilled(boolean flag) { this.baseShapesFilled = flag; } /** * Returns true if lines are being plotted by the renderer. * * @return true if lines are being plotted by the renderer. * * @see #setPlotLines(boolean) */ public boolean getPlotLines() { return this.plotLines; } /** * Sets the flag that controls whether or not a line is plotted between * each data point and sends a {@link RendererChangeEvent} to all * registered listeners. * * @param flag the flag. * * @see #getPlotLines() */ public void setPlotLines(boolean flag) { if (this.plotLines != flag) { this.plotLines = flag; fireChangeEvent(); } } /** * Returns the gap threshold type (relative or absolute). * * @return The type. * * @see #setGapThresholdType(UnitType) */ public UnitType getGapThresholdType() { return this.gapThresholdType; } /** * Sets the gap threshold type and sends a {@link RendererChangeEvent} to * all registered listeners. * * @param thresholdType the type (null not permitted). * * @see #getGapThresholdType() */ public void setGapThresholdType(UnitType thresholdType) { ParamChecks.nullNotPermitted(thresholdType, "thresholdType"); this.gapThresholdType = thresholdType; fireChangeEvent(); } /** * Returns the gap threshold for discontinuous lines. * * @return The gap threshold. * * @see #setGapThreshold(double) */ public double getGapThreshold() { return this.gapThreshold; } /** * Sets the gap threshold for discontinuous lines and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param t the threshold. * * @see #getGapThreshold() */ public void setGapThreshold(double t) { this.gapThreshold = t; fireChangeEvent(); } /** * Returns true if images are being plotted by the renderer. * * @return true if images are being plotted by the renderer. * * @see #setPlotImages(boolean) */ public boolean getPlotImages() { return this.plotImages; } /** * Sets the flag that controls whether or not an image is drawn at each * data point and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param flag the flag. * * @see #getPlotImages() */ public void setPlotImages(boolean flag) { if (this.plotImages != flag) { this.plotImages = flag; fireChangeEvent(); } } /** * Returns a flag that controls whether or not the renderer shows * discontinuous lines. * * @return true if lines should be discontinuous. */ public boolean getPlotDiscontinuous() { return this.plotDiscontinuous; } /** * Sets the flag that controls whether or not the renderer shows * discontinuous lines, and sends a {@link RendererChangeEvent} to all * registered listeners. * * @param flag the new flag value. * * @since 1.0.5 */ public void setPlotDiscontinuous(boolean flag) { if (this.plotDiscontinuous != flag) { this.plotDiscontinuous = flag; fireChangeEvent(); } } /** * Returns a flag that controls whether or not each series is drawn as a * single path. * * @return A boolean. * * @see #setDrawSeriesLineAsPath(boolean) */ public boolean getDrawSeriesLineAsPath() { return this.drawSeriesLineAsPath; } /** * Sets the flag that controls whether or not each series is drawn as a * single path. * * @param flag the flag. * * @see #getDrawSeriesLineAsPath() */ public void setDrawSeriesLineAsPath(boolean flag) { this.drawSeriesLineAsPath = flag; } /** * Returns the shape used to represent a line in the legend. * * @return The legend line (never null). * * @see #setLegendLine(Shape) */ public Shape getLegendLine() { return this.legendLine; } /** * Sets the shape used as a line in each legend item and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param line the line (null not permitted). * * @see #getLegendLine() */ public void setLegendLine(Shape line) { ParamChecks.nullNotPermitted(line, "line"); this.legendLine = line; fireChangeEvent(); } /** * Returns a legend item for a series. * * @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 plot = getPlot(); if (plot == null) { return null; } LegendItem result = null; XYDataset dataset = plot.getDataset(datasetIndex); if (dataset != null) { if (getItemVisible(series, 0)) { String label = getLegendItemLabelGenerator().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 = lookupLegendShape(series); boolean shapeFilled = getItemShapeFilled(series, 0); Paint paint = lookupSeriesPaint(series); Paint linePaint = paint; Stroke lineStroke = lookupSeriesStroke(series); result = new LegendItem(label, description, toolTipText, urlText, this.baseShapesVisible, shape, shapeFilled, paint, !shapeFilled, paint, lineStroke, this.plotLines, this.legendLine, lineStroke, linePaint); 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); } } return result; } /** * Records the state for the renderer. This is used to preserve state * information between calls to the drawItem() method for a single chart * drawing. */ public static class State extends XYItemRendererState { /** The path for the current series. */ public GeneralPath seriesPath; /** The series index. */ private int seriesIndex; /** * A flag that indicates if the last (x, y) point was 'good' * (non-null). */ private boolean lastPointGood; /** * Creates a new state instance. * * @param info the plot rendering info. */ public State(PlotRenderingInfo info) { super(info); } /** * Returns a flag that indicates if the last point drawn (in the * current series) was 'good' (non-null). * * @return A boolean. */ public boolean isLastPointGood() { return this.lastPointGood; } /** * Sets a flag that indicates if the last point drawn (in the current * series) was 'good' (non-null). * * @param good the flag. */ public void setLastPointGood(boolean good) { this.lastPointGood = good; } /** * Returns the series index for the current path. * * @return The series index for the current path. */ public int getSeriesIndex() { return this.seriesIndex; } /** * Sets the series index for the current path. * * @param index the index. */ public void setSeriesIndex(int index) { this.seriesIndex = index; } } /** * Initialises the renderer. *

* This method will be called before the first item is rendered, giving the * renderer an opportunity to initialise any state information it wants to * maintain. The renderer can do nothing if it chooses. * * @param g2 the graphics device. * @param dataArea the area inside the axes. * @param plot the plot. * @param data the data. * @param info an optional info collection object to return data back to * the caller. * * @return The renderer state. */ @Override public XYItemRendererState initialise(Graphics2D g2, Rectangle2D dataArea, XYPlot plot, XYDataset data, PlotRenderingInfo info) { State state = new State(info); state.seriesPath = new GeneralPath(); state.seriesIndex = -1; return state; } /** * 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 data 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 * (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) { boolean itemVisible = getItemVisible(series, item); // setup for collecting optional entity info... Shape entityArea = null; EntityCollection entities = null; if (info != null) { entities = info.getOwner().getEntityCollection(); } PlotOrientation orientation = plot.getOrientation(); Paint paint = getItemPaint(series, item); Stroke seriesStroke = getItemStroke(series, item); g2.setPaint(paint); g2.setStroke(seriesStroke); // get the data point... double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); if (Double.isNaN(x1) || Double.isNaN(y1)) { itemVisible = false; } RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation); if (getPlotLines()) { if (this.drawSeriesLineAsPath) { State s = (State) state; if (s.getSeriesIndex() != series) { // we are starting a new series path s.seriesPath.reset(); s.lastPointGood = false; s.setSeriesIndex(series); } // update path to reflect latest point if (itemVisible && !Double.isNaN(transX1) && !Double.isNaN(transY1)) { float x = (float) transX1; float y = (float) transY1; if (orientation == PlotOrientation.HORIZONTAL) { x = (float) transY1; y = (float) transX1; } if (s.isLastPointGood()) { // TODO: check threshold s.seriesPath.lineTo(x, y); } else { s.seriesPath.moveTo(x, y); } s.setLastPointGood(true); } else { s.setLastPointGood(false); } if (item == dataset.getItemCount(series) - 1) { if (s.seriesIndex == series) { // draw path g2.setStroke(lookupSeriesStroke(series)); g2.setPaint(lookupSeriesPaint(series)); g2.draw(s.seriesPath); } } } else if (item != 0 && itemVisible) { // get the previous data point... double x0 = dataset.getXValue(series, item - 1); double y0 = dataset.getYValue(series, item - 1); if (!Double.isNaN(x0) && !Double.isNaN(y0)) { boolean drawLine = true; if (getPlotDiscontinuous()) { // only draw a line if the gap between the current and // previous data point is within the threshold int numX = dataset.getItemCount(series); double minX = dataset.getXValue(series, 0); double maxX = dataset.getXValue(series, numX - 1); if (this.gapThresholdType == UnitType.ABSOLUTE) { drawLine = Math.abs(x1 - x0) <= this.gapThreshold; } else { drawLine = Math.abs(x1 - x0) <= ((maxX - minX) / numX * getGapThreshold()); } } if (drawLine) { double transX0 = domainAxis.valueToJava2D(x0, dataArea, xAxisLocation); double transY0 = rangeAxis.valueToJava2D(y0, dataArea, yAxisLocation); // only draw if we have good values if (Double.isNaN(transX0) || Double.isNaN(transY0) || Double.isNaN(transX1) || Double.isNaN(transY1)) { return; } if (orientation == PlotOrientation.HORIZONTAL) { state.workingLine.setLine(transY0, transX0, transY1, transX1); } else if (orientation == PlotOrientation.VERTICAL) { state.workingLine.setLine(transX0, transY0, transX1, transY1); } if (state.workingLine.intersects(dataArea)) { g2.draw(state.workingLine); } } } } } // we needed to get this far even for invisible items, to ensure that // seriesPath updates happened, but now there is nothing more we need // to do for non-visible items... if (!itemVisible) { return; } if (getBaseShapesVisible()) { Shape shape = getItemShape(series, item); if (orientation == PlotOrientation.HORIZONTAL) { shape = ShapeUtilities.createTranslatedShape(shape, transY1, transX1); } else if (orientation == PlotOrientation.VERTICAL) { shape = ShapeUtilities.createTranslatedShape(shape, transX1, transY1); } if (shape.intersects(dataArea)) { if (getItemShapeFilled(series, item)) { g2.fill(shape); } else { g2.draw(shape); } } entityArea = shape; } if (getPlotImages()) { Image image = getImage(plot, series, item, transX1, transY1); if (image != null) { Point hotspot = getImageHotspot(plot, series, item, transX1, transY1, image); g2.drawImage(image, (int) (transX1 - hotspot.getX()), (int) (transY1 - hotspot.getY()), null); entityArea = new Rectangle2D.Double(transX1 - hotspot.getX(), transY1 - hotspot.getY(), image.getWidth(null), image.getHeight(null)); } } double xx = transX1; double yy = transY1; if (orientation == PlotOrientation.HORIZONTAL) { xx = transY1; yy = transX1; } // draw the item label if there is one... if (isItemLabelVisible(series, item)) { drawItemLabel(g2, orientation, dataset, series, item, xx, yy, (y1 < 0.0)); } int domainAxisIndex = plot.getDomainAxisIndex(domainAxis); int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis); updateCrosshairValues(crosshairState, x1, y1, domainAxisIndex, rangeAxisIndex, transX1, transY1, orientation); // add an entity for the item... if (entities != null && isPointInRect(dataArea, xx, yy)) { addEntity(entities, entityArea, dataset, series, item, xx, yy); } } /** * Tests this renderer for equality with another object. * * @param obj the object (null permitted). * * @return A boolean. */ @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof StandardXYItemRenderer)) { return false; } StandardXYItemRenderer that = (StandardXYItemRenderer) obj; if (this.baseShapesVisible != that.baseShapesVisible) { return false; } if (this.plotLines != that.plotLines) { return false; } if (this.plotImages != that.plotImages) { return false; } if (this.plotDiscontinuous != that.plotDiscontinuous) { return false; } if (this.gapThresholdType != that.gapThresholdType) { return false; } if (this.gapThreshold != that.gapThreshold) { return false; } if (!ObjectUtilities.equal(this.shapesFilled, that.shapesFilled)) { return false; } if (!this.seriesShapesFilled.equals(that.seriesShapesFilled)) { return false; } if (this.baseShapesFilled != that.baseShapesFilled) { return false; } if (this.drawSeriesLineAsPath != that.drawSeriesLineAsPath) { return false; } if (!ShapeUtilities.equal(this.legendLine, that.legendLine)) { return false; } return super.equals(obj); } /** * Returns a clone of the renderer. * * @return A clone. * * @throws CloneNotSupportedException if the renderer cannot be cloned. */ @Override public Object clone() throws CloneNotSupportedException { StandardXYItemRenderer clone = (StandardXYItemRenderer) super.clone(); clone.seriesShapesFilled = (BooleanList) this.seriesShapesFilled.clone(); clone.legendLine = ShapeUtilities.clone(this.legendLine); return clone; } //////////////////////////////////////////////////////////////////////////// // PROTECTED METHODS // These provide the opportunity to subclass the standard renderer and // create custom effects. //////////////////////////////////////////////////////////////////////////// /** * Returns the image used to draw a single data item. * * @param plot the plot (can be used to obtain standard color information * etc). * @param series the series index. * @param item the item index. * @param x the x value of the item. * @param y the y value of the item. * * @return The image. * * @see #getPlotImages() */ protected Image getImage(Plot plot, int series, int item, double x, double y) { // this method must be overridden if you want to display images return null; } /** * Returns the hotspot of the image used to draw a single data item. * The hotspot is the point relative to the top left of the image * that should indicate the data item. The default is the center of the * image. * * @param plot the plot (can be used to obtain standard color information * etc). * @param image the image (can be used to get size information about the * image) * @param series the series index * @param item the item index * @param x the x value of the item * @param y the y value of the item * * @return The hotspot used to draw the data item. */ protected Point getImageHotspot(Plot plot, int series, int item, double x, double y, Image image) { int height = image.getHeight(null); int width = image.getWidth(null); return new Point(width / 2, height / 2); } /** * 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.legendLine = 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.legendLine, stream); } }





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