问个jfreeChart的问题,如何根据面板坐标获取X、Y轴的值? 如题,在ChartPanel中有没有什么直接的办法获取当前鼠标所在坐标对应的X、Y轴的值? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 换句话说,我如何得到曲线面板ChartPanel中坐标图X轴和Y轴交点处的实际坐标值?因为这个点离面板的左侧和下侧有一定的距离。 给你粘个实例import java.awt.Dimension;import java.awt.Point;import java.awt.geom.Point2D;import java.awt.geom.Rectangle2D;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartMouseEvent;import org.jfree.chart.ChartMouseListener;import org.jfree.chart.ChartPanel;import org.jfree.chart.ChartRenderingInfo;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.ValueAxis;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.plot.XYPlot;import org.jfree.data.xy.XYDataset;import org.jfree.data.xy.XYSeries;import org.jfree.data.xy.XYSeriesCollection;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RectangleEdge;import org.jfree.ui.RefineryUtilities;public class MouseListenerDemo extends ApplicationFrame implements ChartMouseListener{ /** * */ private static final long serialVersionUID = 1L; private JFreeChart chart; private ChartPanel chartPanel; public MouseListenerDemo(String paramString){ super(paramString); String applicationTitle = "Mouse Listener Demo"; XYDataset xyDataset = createDataset(); this.chart = ChartFactory.createXYLineChart(applicationTitle, "X", "Y", xyDataset, PlotOrientation.VERTICAL, true, true, false); this.chartPanel = new ChartPanel(this.chart); this.chartPanel.setPreferredSize(new Dimension(700, 450)); this.chartPanel.setMouseZoomable(true, false); this.chartPanel.addChartMouseListener(this); setContentPane(this.chartPanel); } public XYDataset createDataset(){ XYSeries xySeries = new XYSeries("Series 1"); xySeries.add(12.0D, 10.0D); xySeries.add(13.0D, 15.0D); xySeries.add(14.0D, 16.0D); xySeries.add(15.5D, 17.0D); xySeries.add(17.0D, 20.0D); xySeries.add(18.0D, 18.0D); xySeries.add(19.0D, 16.0D); xySeries.add(20.0D, 15.0D); XYSeriesCollection xySeriesCollection = new XYSeriesCollection(); xySeriesCollection.addSeries(xySeries); return xySeriesCollection; } public void chartMouseClicked(ChartMouseEvent paramChartMouseEvent){ int xPos = paramChartMouseEvent.getTrigger().getX(); int yPos = paramChartMouseEvent.getTrigger().getY(); System.out.println("x = " + xPos + ", y = " + yPos); Point2D point2D = this.chartPanel.translateScreenToJava2D(new Point(xPos, yPos)); XYPlot xyPlot = (XYPlot)this.chart.getPlot(); ChartRenderingInfo chartRenderingInfo = this.chartPanel.getChartRenderingInfo(); Rectangle2D rectangle2D = chartRenderingInfo.getPlotInfo().getDataArea(); ValueAxis valueAxis1 = xyPlot.getDomainAxis(); RectangleEdge rectangleEdge1 = xyPlot.getDomainAxisEdge(); ValueAxis valueAxis2 = xyPlot.getRangeAxis(); RectangleEdge rectangleEdge2 = xyPlot.getRangeAxisEdge(); double d1 = valueAxis1.java2DToValue(point2D.getX(), rectangle2D, rectangleEdge1); double d2 = valueAxis2.java2DToValue(point2D.getY(), rectangle2D, rectangleEdge2); System.out.println("Chart: x = " + d1 + ", y = " + d2); } public void chartMouseMoved(ChartMouseEvent paramChartMouseEvent){ } public static void main(String[] paramArrayOfString){ MouseListenerDemo localMouseListenerDemo = new MouseListenerDemo("JFreeChart: MouseListenerDemo.java"); localMouseListenerDemo.pack(); RefineryUtilities.centerFrameOnScreen(localMouseListenerDemo); localMouseListenerDemo.setVisible(true); }} 求一个正则表达式,匹配字符串中的单词 JFrame一点布局小问题 我想看一下jdk包里的一些函数功能的实现,不知道怎么看 大家现在用Java做项目都用什么开发工具开发 程序访问一个URL,该URL会重定向,如何获取重定向后的URL 帮忙整整,实在不知道怎么整了,关于JavaScript和数据库的问题进行联动的 用二进制文件保存两个人的聊天记录(类似QQ聊天),那如何区分开各聊天信息呢?用个什么分隔符号? 菜鸟的问题(见笑了) 关于jbuilder网页应用问题 Java 截取字符串 请问如何实现在console多行输入command 一道简单的JAVA题,请教。初学者!
import java.awt.Dimension;
import java.awt.Point;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RefineryUtilities;public class MouseListenerDemo extends ApplicationFrame implements ChartMouseListener{
/**
*
*/
private static final long serialVersionUID = 1L;
private JFreeChart chart;
private ChartPanel chartPanel; public MouseListenerDemo(String paramString){
super(paramString);
String applicationTitle = "Mouse Listener Demo";
XYDataset xyDataset = createDataset();
this.chart = ChartFactory.createXYLineChart(applicationTitle, "X", "Y", xyDataset,
PlotOrientation.VERTICAL, true, true, false);
this.chartPanel = new ChartPanel(this.chart);
this.chartPanel.setPreferredSize(new Dimension(700, 450));
this.chartPanel.setMouseZoomable(true, false);
this.chartPanel.addChartMouseListener(this);
setContentPane(this.chartPanel);
} public XYDataset createDataset(){
XYSeries xySeries = new XYSeries("Series 1");
xySeries.add(12.0D, 10.0D);
xySeries.add(13.0D, 15.0D);
xySeries.add(14.0D, 16.0D);
xySeries.add(15.5D, 17.0D);
xySeries.add(17.0D, 20.0D);
xySeries.add(18.0D, 18.0D);
xySeries.add(19.0D, 16.0D);
xySeries.add(20.0D, 15.0D);
XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
xySeriesCollection.addSeries(xySeries);
return xySeriesCollection;
} public void chartMouseClicked(ChartMouseEvent paramChartMouseEvent){
int xPos = paramChartMouseEvent.getTrigger().getX();
int yPos = paramChartMouseEvent.getTrigger().getY();
System.out.println("x = " + xPos + ", y = " + yPos);
Point2D point2D = this.chartPanel.translateScreenToJava2D(new Point(xPos, yPos));
XYPlot xyPlot = (XYPlot)this.chart.getPlot();
ChartRenderingInfo chartRenderingInfo = this.chartPanel.getChartRenderingInfo();
Rectangle2D rectangle2D = chartRenderingInfo.getPlotInfo().getDataArea();
ValueAxis valueAxis1 = xyPlot.getDomainAxis();
RectangleEdge rectangleEdge1 = xyPlot.getDomainAxisEdge();
ValueAxis valueAxis2 = xyPlot.getRangeAxis();
RectangleEdge rectangleEdge2 = xyPlot.getRangeAxisEdge();
double d1 = valueAxis1.java2DToValue(point2D.getX(), rectangle2D, rectangleEdge1);
double d2 = valueAxis2.java2DToValue(point2D.getY(), rectangle2D, rectangleEdge2);
System.out.println("Chart: x = " + d1 + ", y = " + d2);
} public void chartMouseMoved(ChartMouseEvent paramChartMouseEvent){
} public static void main(String[] paramArrayOfString){
MouseListenerDemo localMouseListenerDemo = new MouseListenerDemo("JFreeChart: MouseListenerDemo.java");
localMouseListenerDemo.pack();
RefineryUtilities.centerFrameOnScreen(localMouseListenerDemo);
localMouseListenerDemo.setVisible(true);
}
}