jfreechart 使用
http://ltc603.iteye.com/blog/30207
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http://langhua9527.iteye.com/blog/395244
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http://chinaxxren.iteye.com/blog/701297
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http://hoocy.iteye.com/blog/327066
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http://www.iteye.com/wiki/topic/360994
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public String getToolTipText(MouseEvent e) {
??// TODO Auto-generated method stub
??// return super.getToolTipText(e);
??Point2D p = translateScreenToJava2D(e.getPoint());
??ChartRenderingInfo info = getChartRenderingInfo();
??Rectangle2D dataArea = info.getPlotInfo().getDataArea();
??// check if the mouse is really in the data area
??if (dataArea.contains(p) == false) {
???return null;
??}
??XYPlot plot = (XYPlot) chart.getPlot();
??ValueAxis domainAxis = plot.getDomainAxis();
??RectangleEdge domainAxisEdge = plot.getDomainAxisEdge();
??double chartX = domainAxis.java2DToValue(p.getX(), dataArea,
????domainAxisEdge);
??ValueAxis yAxis = plot.getRangeAxis();
??RectangleEdge yAxisEdge = plot.getRangeAxisEdge();
??
??double chartY = yAxis.java2DToValue(p.getY(), dataArea, yAxisEdge);
??
??String value = String.format("x = %.1f, y= %.1f", chartX, chartY);
//??return String.valueOf(chartX);
??
??return value;
?}
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Rectangle2D dataArea = chartPanel.getChartRenderingInfo().getPlotInfo().getDataArea();
Point2D p = chartPanel.translateScreenToJava2D(pt);
double chartX = xyplot.getDomainAxis().java2DToValue(p.getX(), dataArea, xyplot.getDomainAxisEdge());
double chartY = xyplot.getRangeAxis().java2DToValue(p.getY(), dataArea, xyplot.getRangeAxisEdge());
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chartPanel
??.addChartMouseListener(new org.jfree.chart.ChartMouseListener() {
???public void chartMouseClicked(ChartMouseEvent evt) {
????try {
?????if (evt.getChart() != null
???????& evt.getEntity() != null) {
??????CategoryItemEntity cie = (CategoryItemEntity) evt
????????.getEntity();
??????if (cie.getCategory() == null)
???????return;
??????if (cie.getCategoryIndex() >= 0) {
???????cie = (CategoryItemEntity) evt.getEntity();
???????int i = cie.getCategoryIndex();
???????System.out.println("Your Selected Index > "
?????????+ i);
??????}
?????} else
??????return;
????} catch (Exception ce) {
?????System.out.println("Error" + ce);
????}
???}
???public void chartMouseMoved(ChartMouseEvent event) {
????int x = event.getTrigger().getX();
????int y = event.getTrigger().getY();
????ChartEntity entity = event.getEntity();
????if (entity != null) {
?????System.out.println("Mouse moved: " + x + ", " + y
???????+ ": " + entity.toString());
????} else {
?????System.out.println("Mouse moved: " + x + ", " + y
???????+ ": null entity.");
????}
???}
??});
