📄 xybubblerenderer.java
字号:
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2005, 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.]
*
* ---------------------
* XYBubbleRenderer.java
* ---------------------
* (C) Copyright 2003-2005, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Christian W. Zuckschwerdt;
*
* $Id: XYBubbleRenderer.java,v 1.8.2.3 2005/11/28 12:06:35 mungady Exp $
*
* Changes
* -------
* 28-Jan-2003 : Version 1 (DG);
* 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);
* 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
* 10-Feb-2004 : Small change to drawItem() method to make cut-and-paste
* overriding easier (DG);
* 15-Jul-2004 : Switched getZ() and getZValue() methods (DG);
* 19-Jan-2005 : Now accesses only primitives from dataset (DG);
* 28-Feb-2005 : Modify renderer to use circles in legend (DG);
* 17-Mar-2005 : Fixed bug in bubble bounds calculation (DG);
* 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
*
*/
package org.jfree.chart.renderer.xy;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
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.entity.XYItemEntity;
import org.jfree.chart.labels.XYToolTipGenerator;
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.xy.XYDataset;
import org.jfree.data.xy.XYZDataset;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.PublicCloneable;
/**
* A renderer that draws a circle at each data point with a diameter that is
* determined by the z-value in the dataset (the renderer requires the dataset
* to be an instance of {@link XYZDataset}.
*/
public class XYBubbleRenderer extends AbstractXYItemRenderer
implements XYItemRenderer,
Cloneable,
PublicCloneable,
Serializable {
/** For serialization. */
public static final long serialVersionUID = -5221991598674249125L;
/** A useful constant. */
public static final int SCALE_ON_BOTH_AXES = 0;
/** A useful constant. */
public static final int SCALE_ON_DOMAIN_AXIS = 1;
/** A useful constant. */
public static final int SCALE_ON_RANGE_AXIS = 2;
/** Controls how the width and height of the bubble are scaled. */
private int scaleType;
/**
* Constructs a new renderer.
*/
public XYBubbleRenderer() {
this(SCALE_ON_BOTH_AXES);
}
/**
* Constructs a new renderer with the specified type of scaling.
*
* @param scaleType the type of scaling.
*/
public XYBubbleRenderer(int scaleType) {
super();
this.scaleType = scaleType;
}
/**
* Returns the scale type.
*
* @return The scale type.
*/
public int getScaleType() {
return this.scaleType;
}
/**
* 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 (horizontal) axis.
* @param rangeAxis the range (vertical) 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.
*/
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) {
PlotOrientation orientation = plot.getOrientation();
// get the data point...
double x = dataset.getXValue(series, item);
double y = dataset.getYValue(series, item);
double z = Double.NaN;
if (dataset instanceof XYZDataset) {
XYZDataset xyzData = (XYZDataset) dataset;
z = xyzData.getZValue(series, item);
}
if (!Double.isNaN(z)) {
RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
double transX = domainAxis.valueToJava2D(
x, dataArea, domainAxisLocation
);
double transY = rangeAxis.valueToJava2D(
y, dataArea, rangeAxisLocation
);
double transDomain = 0.0;
double transRange = 0.0;
double zero;
switch(getScaleType()) {
case SCALE_ON_DOMAIN_AXIS:
zero = domainAxis.valueToJava2D(
0.0, dataArea, domainAxisLocation
);
transDomain = domainAxis.valueToJava2D(
z, dataArea, domainAxisLocation
) - zero;
transRange = transDomain;
break;
case SCALE_ON_RANGE_AXIS:
zero = rangeAxis.valueToJava2D(
0.0, dataArea, rangeAxisLocation
);
transRange = zero - rangeAxis.valueToJava2D(
z, dataArea, rangeAxisLocation
);
transDomain = transRange;
break;
default:
double zero1 = domainAxis.valueToJava2D(
0.0, dataArea, domainAxisLocation
);
double zero2 = rangeAxis.valueToJava2D(
0.0, dataArea, rangeAxisLocation
);
transDomain = domainAxis.valueToJava2D(
z, dataArea, domainAxisLocation
) - zero1;
transRange = zero2 - rangeAxis.valueToJava2D(
z, dataArea, rangeAxisLocation
);
}
transDomain = Math.abs(transDomain);
transRange = Math.abs(transRange);
Ellipse2D circle = null;
if (orientation == PlotOrientation.VERTICAL) {
circle = new Ellipse2D.Double(
transX - transDomain / 2.0, transY - transRange / 2.0,
transDomain, transRange
);
}
else if (orientation == PlotOrientation.HORIZONTAL) {
circle = new Ellipse2D.Double(
transY - transRange / 2.0, transX - transDomain / 2.0,
transRange, transDomain
);
}
g2.setPaint(getItemPaint(series, item));
g2.fill(circle);
g2.setStroke(new BasicStroke(1.0f));
g2.setPaint(Color.lightGray);
g2.draw(circle);
// setup for collecting optional entity info...
EntityCollection entities = null;
if (info != null) {
entities = info.getOwner().getEntityCollection();
}
// add an entity for the item...
if (entities != null) {
String tip = null;
XYToolTipGenerator generator
= getToolTipGenerator(series, item);
if (generator != null) {
tip = generator.generateToolTip(dataset, series, item);
}
String url = null;
if (getURLGenerator() != null) {
url = getURLGenerator().generateURL(dataset, series, item);
}
XYItemEntity entity = new XYItemEntity(
circle, dataset, series, item, tip, url
);
entities.add(entity);
}
updateCrosshairValues(
crosshairState, x, y, transX, transY, orientation
);
}
}
/**
* Returns a legend item for the specified series. The default method
* is overridden so that the legend displays circles for all series.
*
* @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) {
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 = new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0);
Paint paint = getSeriesPaint(series);
Paint outlinePaint = getSeriesOutlinePaint(series);
Stroke outlineStroke = getSeriesOutlineStroke(series);
result = new LegendItem(label, description,
toolTipText, urlText, shape, paint,
outlineStroke, outlinePaint);
}
}
}
return result;
}
/**
* Returns a clone of the renderer.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the renderer cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -