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jfreechart example source code file (XYBarRenderer.java)
This example jfreechart source code file (XYBarRenderer.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.
The jfreechart XYBarRenderer.java source code
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2009, 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.]
*
* ------------------
* XYBarRenderer.java
* ------------------
* (C) Copyright 2001-2009, 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);
*
*/
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.data.Range;
import org.jfree.data.general.DatasetUtilities;
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 program included in the JFreeChart
* demo collection:
* <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 not permitted).
*
* @since 1.0.11
*/
public static void setDefaultBarPainter(XYBarPainter painter) {
if (painter == null) {
throw new IllegalArgumentException("Null 'painter' argument.");
}
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 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).
*/
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).
*
* @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 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 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).
*
* @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 not permitted).
*
* @see #getLegendBar()
*/
public void setLegendBar(Shape bar) {
if (bar == null) {
throw new IllegalArgumentException("Null 'bar' argument.");
}
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 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 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 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 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).
*
* @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 not permitted).
*
* @since 1.0.11
*/
public void setBarPainter(XYBarPainter painter) {
if (painter == null) {
throw new IllegalArgumentException("Null 'painter' argument.");
}
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.
*/
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.
*/
public LegendItem getLegendItem(int datasetIndex, int series) {
LegendItem result = null;
XYPlot xyplot = getPlot();
if (xyplot != null) {
XYDataset dataset = xyplot.getDataset(datasetIndex);
if (dataset != null) {
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 permitted).
* @param pass the pass index.
*/
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 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 = null;
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 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 permitted).
*
* @return The range (<code>null if the dataset is
* <code>null or empty).
*/
public Range findDomainBounds(XYDataset dataset) {
if (dataset != null) {
return DatasetUtilities.findDomainBounds(dataset, true);
}
else {
return null;
}
}
/**
* 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 permitted).
*
* @return The range (<code>null if the dataset is
* <code>null or empty).
*/
public Range findRangeBounds(XYDataset dataset) {
if (dataset != null) {
return DatasetUtilities.findRangeBounds(dataset,
this.useYInterval);
}
else {
return null;
}
}
/**
* Returns a clone of the renderer.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the renderer cannot be cloned.
*/
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 permitted).
*
* @return A boolean.
*/
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);
}
}
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