RCP显示Jfreechart图表的二种方式

用方式二的时候，自己写的代码会报这个错：

Exception in thread "main" java.lang.RuntimeException: Can only handle 'Color' at present.

 

 

下面的代码方式二是用的jfreechart自带的例子，在org.jfree.experimental.chart.swt.demo里面

 

 package jfreechart; import java.awt.Color; import java.awt.Frame; import org.eclipse.swt.SWT; import org.eclipse.swt.awt.SWT_AWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.CategoryLabelPositions; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.BarRenderer; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.experimental.chart.swt.ChartComposite; /** * A simple demonstration application showing how to create a bar chart. */ public class BarChartDemo1 { /** * Returns a sample dataset. * * @return The dataset. */ public static CategoryDataset createDataset() { // row keys... String series1 = "First"; String series2 = "Second"; String series3 = "Third"; // column keys... String category1 = "Category 1"; String category2 = "Category 2"; String category3 = "Category 3"; String category4 = "Category 4"; String category5 = "Category 5"; // create the dataset... DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(1.0, series1, category1); dataset.addValue(4.0, series1, category2); dataset.addValue(3.0, series1, category3); dataset.addValue(5.0, series1, category4); dataset.addValue(5.0, series1, category5); dataset.addValue(5.0, series2, category1); dataset.addValue(7.0, series2, category2); dataset.addValue(6.0, series2, category3); dataset.addValue(8.0, series2, category4); dataset.addValue(4.0, series2, category5); dataset.addValue(4.0, series3, category1); dataset.addValue(3.0, series3, category2); dataset.addValue(2.0, series3, category3); dataset.addValue(3.0, series3, category4); dataset.addValue(6.0, series3, category5); return dataset; } /** * Creates a sample chart. * * @param dataset the dataset. * * @return The chart. */ public static JFreeChart createChart(CategoryDataset dataset) { // create the chart... JFreeChart chart = ChartFactory.createBarChart( "Bar Chart Demo", // chart title "Category", // domain axis label "Value", // range axis label dataset, // data PlotOrientation.VERTICAL, // orientation true, // include legend true, // tooltips? false // URLs? ); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... // set the background color for the chart... chart.setBackgroundPaint(Color.white); // get a reference to the plot for further customisation... CategoryPlot plot = (CategoryPlot) chart.getPlot(); plot.setBackgroundPaint(Color.lightGray); plot.setDomainGridlinePaint(Color.white); plot.setDomainGridlinesVisible(true); plot.setRangeGridlinePaint(Color.white); // set the range axis to display integers only... final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); // disable bar outlines... BarRenderer renderer = (BarRenderer) plot.getRenderer(); renderer.setDrawBarOutline(false); CategoryAxis domainAxis = plot.getDomainAxis(); domainAxis.setCategoryLabelPositions( CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 6.0) ); // OPTIONAL CUSTOMISATION COMPLETED. return chart; } /** * Starting point for the demonstration application. * * @param args * ignored. */ public static void main(String[] args) { JFreeChart chart = createChart(createDataset()); Display display = new Display(); Shell shell = new Shell(display); shell.setSize(600, 300); shell.setLayout(new FillLayout()); shell.setText("Test for jfreechart running with SWT"); //方式一：swt_awt桥连接。缺点：速度慢 Composite composite = new Composite(shell,SWT.EMBEDDED); Frame frame = SWT_AWT.new_Frame(composite); frame.add(new ChartPanel(chart)); // 方式二：swt组件。缺点：仍是experimental阶段。显示的图也没有方式一好看 final ChartComposite frame2 = new ChartComposite(shell, SWT.NONE, chart,true); frame2.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } } }