Question

我试图在eclipse插件视图中绘制一个XY图表，但我的代码中有一个错误，我无法找到它的位置。

我使用了此链接http://www.codejava.net/java-se/graphics/using-jfreechart-to-draw-xy-line-chart-with-xydataset

中的示例

package Views;

import java.awt.Color; 
import java.awt.BasicStroke; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.data.xy.XYDataset; 
import org.jfree.data.xy.XYSeries; 
import org.jfree.ui.ApplicationFrame; 
import org.jfree.ui.RefineryUtilities; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.data.xy.XYSeriesCollection; 
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;

class XYplot extends ViewPart
{
    public XYplot() 
    {
    }

    @Override
    public void createPartControl(Composite parent) 
    {
          XYLineChart_AWT chart = new XYLineChart_AWT("Browser Usage Statistics", "Which Browser are you using?");
          chart.pack( );          
          RefineryUtilities.centerFrameOnScreen( chart );          
          chart.setVisible( true );
    }

    private void createActions() 
    {
        // Create the actions
    }

    private void initializeToolBar() 
    {
        IToolBarManager toolbarManager = getViewSite().getActionBars().getToolBarManager();
    }

    private void initializeMenu()
    {
        IMenuManager menuManager = getViewSite().getActionBars().getMenuManager();
    }

    @Override
    public void setFocus() 
    {
        // Set the focus
    }


    class XYLineChart_AWT extends ApplicationFrame 
    {
       public XYLineChart_AWT( String applicationTitle, String chartTitle )
       {
          super(applicationTitle);
          JFreeChart xylineChart = ChartFactory.createXYLineChart(
             chartTitle ,
             "Category" ,
             "Score" ,
             createDataset() ,
             PlotOrientation.VERTICAL ,
             true , true , false);

          ChartPanel chartPanel = new ChartPanel( xylineChart );
          chartPanel.setPreferredSize( new java.awt.Dimension( 560 , 367 ) );
          final XYPlot plot = xylineChart.getXYPlot( );
          XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer( );
          renderer.setSeriesPaint( 0 , Color.RED );
          renderer.setSeriesPaint( 1 , Color.GREEN );
          renderer.setSeriesPaint( 2 , Color.YELLOW );
          renderer.setSeriesStroke( 0 , new BasicStroke( 4.0f ) );
          renderer.setSeriesStroke( 1 , new BasicStroke( 3.0f ) );
          renderer.setSeriesStroke( 2 , new BasicStroke( 2.0f ) );
          plot.setRenderer( renderer ); 
          setContentPane( chartPanel ); 
       }

       private XYDataset createDataset( )
       {
          final XYSeries firefox = new XYSeries( "Firefox" );          
          firefox.add( 1.0 , 1.0 );          
          firefox.add( 2.0 , 4.0 );          
          firefox.add( 3.0 , 3.0 );          
          final XYSeries chrome = new XYSeries( "Chrome" );          
          chrome.add( 1.0 , 4.0 );          
          chrome.add( 2.0 , 5.0 );          
          chrome.add( 3.0 , 6.0 );          
          final XYSeries iexplorer = new XYSeries( "InternetExplorer" );          
          iexplorer.add( 3.0 , 4.0 );          
          iexplorer.add( 4.0 , 5.0 );          
          iexplorer.add( 5.0 , 4.0 );          
          final XYSeriesCollection dataset = new XYSeriesCollection( );          
          dataset.addSeries( firefox );          
          dataset.addSeries( chrome );          
          dataset.addSeries( iexplorer );
          return dataset;
       }

    }
}

.log文件内容

!SESSION 2016-06-13 16:10:18.594 -----------------------------------------------
eclipse.buildId=4.5.1.M20150904-0015
java.version=1.8.0_66
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.committers.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.committers.product

!ENTRY org.eclipse.epp.logging.aeri.ui 2 19 2016-06-13 16:11:14.840
!MESSAGE Updating the index from remote failed. Version: 1.0.1.v20150913-0716
!STACK 0
java.io.EOFException: Unexpected end of ZLIB input stream
    at java.util.zip.InflaterInputStream.fill(Unknown Source)
    at java.util.zip.InflaterInputStream.read(Unknown Source)
    at java.util.zip.ZipInputStream.read(Unknown Source)
    at java.io.FilterInputStream.read(Unknown Source)
    at com.google.common.io.ByteStreams.copy(ByteStreams.java:169)
    at com.google.common.io.ByteSink.writeFrom(ByteSink.java:134)
    at org.eclipse.epp.internal.logging.aeri.ui.utils.Zips.unzip(Zips.java:83)
    at org.eclipse.epp.internal.logging.aeri.ui.log.ProblemsDatabaseUpdateJob.run(ProblemsDatabaseUpdateJob.java:71)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.egit.ui 2 0 2016-06-13 16:11:35.087
!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
user global configuration and to define the default location to store repositories: 'C:\Users\Amr'. If this is
not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
EGit might behave differently since they see different configuration options.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.

!ENTRY org.eclipse.ui.monitoring 2 0 2016-06-13 16:11:45.478
!MESSAGE UI freeze of 0.71s at 16:11:44.762

!ENTRY org.eclipse.ui.monitoring 2 0 2016-06-13 16:11:47.920
!MESSAGE UI freeze of 0.58s at 16:11:47.334

!ENTRY org.eclipse.ui.monitoring 2 0 2016-06-13 16:11:52.904
!MESSAGE UI freeze of 0.63s at 16:11:52.256

控制台输出

!SESSION 2016-06-13 16:23:58.435 -----------------------------------------------
eclipse.buildId=4.5.1.M20150904-0015
java.version=1.8.0_66
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.platform.ide
Command-line arguments:  -product org.eclipse.platform.ide -data E:\Intense\GitHub/runtime-NatTableExamples -dev file:E:/Intense/GitHub/.metadata/.plugins/org.eclipse.pde.core/NatTableExamples/dev.properties -os win32 -ws win32 -arch x86_64 -consoleLog

!ENTRY org.eclipse.ui 4 4 2016-06-13 16:24:07.361
!MESSAGE Unable to create part

!ENTRY org.eclipse.ui 4 1 2016-06-13 16:24:07.366
!MESSAGE Plug-in "diagnostictool" was unable to instantiate class "Views.XYplot".
!STACK 1
org.eclipse.core.runtime.CoreException: Plug-in "diagnostictool" was unable to instantiate class "Views.XYplot".
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194)
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:188)
    at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
    at org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:58)

Answer 1

createPartControl()＆＃34;的具体实现;为此工作台部分创建SWT控件。＆＃34;您正在创建ApplicationFrame，JFrame的子类，这是一个Swing top-level container。您可能想要创建ChartComposite。虽然我没有尝试过，但分发版中包含的swt/org/jfree/experimental目录中有一些示例。

如何使用Jfreechart在Eclipse插件视图中绘制XY线图

1 个答案: