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我需要在JFrame中添加一个进度条，但我想在不生成新线程的情况下更新这个进度条（例如在后台更新进度条的SwingWorker）。有没有办法更新当前线程（主 JFrame 的当前线程）中的进度条？

详细介绍

我有扩展 JFrame 并调用第二类的第一类（“ChooseGUI”）。第二个类（“ProgressFrame”）是 JFrame 的另一个扩展：当我在 ChooseGUI 中按下按钮时，ChooseGUI 变得不可见，ProgressFrame（显示进度条）变为可见并调用 SwingWorker 来更新条。问题是ChooseGUI 继续执行，而我希望ChooseGUI 等待ProgressBar 的'DONE'

类ChooseGUI（一块）

  public class ChooseGUI extends JFrame{
            public ChooseGUI(IJavaProject project){
            super(project.getElementName());

            this.project = project;
            this.classi = new HashMap<ICompilationUnit,Boolean>();


            inizializeMap();




    JPanel p = createPanel();

                    if(p != null){

                        JScrollPane pane = new JScrollPane(p);
                        pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);// disabilito la scrollbar orizzontale
                        pane.setSize(1000, 5000);
                    add(pane);

                    setLocationRelativeTo(null);
                    setResizable(true);
                    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                    pack();
                    setVisible(true); 

                    }
                    else{


setVisible(false);
                    JOptionPane.showMessageDialog(null, "Classi not found!");
                }
    }


    private void inizializeMap(){
        ArrayList<ICompilationUnit> className = getClassNames();
        for(ICompilationUnit a : className){
            classi.put(a,false);
        }
    }



    private JPanel createPanel(){
        JPanel result = new JPanel(new GridLayout(0, 1));

        ArrayList<ICompilationUnit> className = getClassNames();


        int size = className.size();
        if(size > 0){       

            Collections.sort(className, new Comparator<ICompilationUnit>(){

                @Override
                public int compare(ICompilationUnit o1, ICompilationUnit o2) {
                     return o1.getElementName().compareTo(o2.getElementName());
                     }});

        for(int i = 0; i < size ; ++i){
            String name = className.get(i).getElementName();
            JCheckBox box = new JCheckBox(name);
            box.setActionCommand(name);

            box.addItemListener(this);
            result.add(box);

        }

        JButton confirm = new JButton(new ImageIcon(pathIconChoose));
        confirm.setSize(500, 1000);
        result.add(confirm);

        confirm.addActionListener(new ActionListener(){


            @SuppressWarnings("deprecation")
            @Override
            public void actionPerformed(ActionEvent arg0) {

                setVisible(false);


                int size = classi.size();

                if(size > 0){

                        BuildDB a = null;
                        try {
                            a = new BuildDB();
                        } catch (ClassNotFoundException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                    Set<ICompilationUnit> keySet2 = classi.keySet();
                    ArrayList<ICompilationUnit> units = new ArrayList<ICompilationUnit>();
                    for(ICompilationUnit unit: keySet2){
                        if(classi.get(unit) == true){
                                        units.add(unit);
                        }}



                            QueryAndManipulateDB t = new QueryAndManipulateDB(a);


                            ProgressFrame guiFrame = new ProgressFrame(units,t);


                           guiFrame.generateGUIAndUpdateDB();




                            //// quering
                            for(ICompilationUnit unit : units){         
                            ArrayList<Coppia> lista = new ArrayList<Coppia>();


                             ASTParser parser = ASTParser.newParser(AST.JLS3);
                             parser.setSource(unit);
                             CompilationUnit astRoot = (CompilationUnit) parser.createAST(null);
                             astRoot.recordModifications();
                             TypeDeclaration typeDeclaration = (TypeDeclaration)astRoot.types().get(0);


                             int length = typeDeclaration.getMethods().length;
                             if(length > 0){
                             for(int j = 0; j < length; ++j){
                             MethodDeclaration methodDecl = typeDeclaration.getMethods()[j];





                             Coppia c = t.getComment(unit.getElementName(), getSignature(methodDecl));

                             if(c.getCommenti().size() > 0){
                             lista.add(c);}
                             }


                             if(lista.size() > 0){
                             CommentoFrame f = new CommentoFrame(("Select Comment for " + unit.getElementName()),lista, unit);
                             f.setResizable(true);
                             f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                                f.pack();
                                f.setVisible(true);
                             }

                             else{
                                 JOptionPane.showMessageDialog(null, "Commenti non trovati per " + unit.getElementName());
                             }


                                dispose();
                             }



                }


                      a.closeConnection();//}
            }


            }


        });

        return result;}
        else
        {
            return null;
        }
    }

进度框架

public class ProgressFrame extends JFrame{

/**
 * 
 */
private static final long serialVersionUID = 1L;
private ArrayList<ICompilationUnit> units;
private QueryAndManipulateDB q;



public ProgressFrame(ArrayList<ICompilationUnit> units, QueryAndManipulateDB q){
    setLayout(new GridLayout(0,1));
    this.units = units;
    this.q = q;
}

public void generateGUIAndUpdateDB(){

    ArrayList<JPanel> panels = new ArrayList<JPanel>();
    for(int i = 0; i < units.size(); ++i){
        final String simpleClassName = units.get(i).getElementName();
        String fullClassName = units.get(i).getParent().getElementName() + "." + simpleClassName.substring(0, simpleClassName.length() - 5);


        JPanel pan = new JPanel();
        pan.setName(fullClassName);


        Introspection intro = new Introspection(fullClassName);
        //create progress bar        
        int size = intro.getMethodSignatures().size();
        JProgressBar progressBar = new JProgressBar(0,size);
        progressBar.setValue(0);

        JLabel label = new JLabel("Search for class " +  simpleClassName.substring(0, simpleClassName.length() - 5));
        label.setName(simpleClassName);

        pan.setLayout(new BorderLayout());
        pan.add(label, BorderLayout.NORTH);
        pan.add(progressBar, BorderLayout.CENTER);

        panels.add(pan);
        add(pan);



        final ClassEvaluating ce = new ClassEvaluating(pan);

        ce.addPropertyChangeListener(new PropertyChangeListener(){

            @Override
            public void propertyChange(PropertyChangeEvent evt) {
                 if (evt.getPropertyName().equals("state") && evt.getNewValue().equals(SwingWorker.StateValue.DONE)) {


                    HashMap<String, ParagraphsList> paragraphsForMethods = ce.getResult();


                    for(String metodo : paragraphsForMethods.keySet()){
                        ParagraphsList par = paragraphsForMethods.get(metodo);
                        ArrayList<Comment> commenti = new ArrayList<Comment>();

                        List<Paragraph> list = par.getRankList();
                        for(Paragraph p: list){
                        double score = p.getScore();
                        if(score > 0)
                        commenti.add(new Comment(p.getText(),score));
                        }

                        Association ass = new Association(simpleClassName,metodo,commenti);
                        q.updateDB(ass);
                    }

                            }


            }

        });

        ce.execute(); }}}

ClassEvaluating 类是一个更新进度条的 SwingWorker。

怎么了？当我在测试器中启动 ChooseGUI 时，JOptionPane 消息“Commenti non trovati per..”在进度条之前显示。我希望 ChooseGUI 等待 ProgressBar 的“完成”！

4

2 回答 2

2

您应该使用模态对话框进行阻止：

编辑：EDT 中的进度可视化 - 这也可以用你的PropertyChangeEvent

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Test {

    public Test() {
        createAndShowGUI();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Test();
            }
        });
    }

    private void createAndShowGUI() {
        JFrame frame = new JFrame();
        frame.setSize( 500, 500 );
        frame.setLocationRelativeTo( null );
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout( new BorderLayout() );
        frame.getContentPane().add(new JButton( openChooseGUI() ), BorderLayout.SOUTH);      
        frame.setVisible(true);
    }

    private Action openChooseGUI() {
        return new AbstractAction("ChooseGUI") {
            @Override
            public void actionPerformed( ActionEvent e ) {
                new ChooseGUI().setVisible( true );
            }
        };
    }

    public class ChooseGUI extends JFrame {

        public ChooseGUI() {
            setSize( 200, 200 );
            setLocationRelativeTo( null );
            setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
            getContentPane().setLayout( new BorderLayout() );
            getContentPane().add( new JLabel( "This is ChooseGUI" ), BorderLayout.CENTER );
            init();
        }

        private void init() {
            final JDialog progressDialog = new JDialog( this, true );
            final JProgressBar progress = new JProgressBar( JProgressBar.HORIZONTAL );
            progress.addChangeListener( new ChangeListener() {
                @Override
                public void stateChanged( ChangeEvent e ) {
                    // TODO Auto-generated method stub
                    int current = ((JProgressBar)e.getSource()).getValue();
                    if(current >= 100) {
                        progressDialog.dispose();
                    }
                }
            } );

            progressDialog.setSize( 400, 100 );
            progressDialog.setLocationRelativeTo( this );
            progressDialog.getContentPane().setLayout( new BorderLayout() );
            progressDialog.getContentPane().add( progress, BorderLayout.NORTH );
            progressDialog.getContentPane().add(  new JLabel( "This is Progress Dialog" ), BorderLayout.CENTER );
            progressDialog.getContentPane().add(  new JButton(new AbstractAction("click to progress") {
                @Override
                public void actionPerformed( ActionEvent e ) {
                    progress.setValue( progress.getValue()+25 );
                }
            }), BorderLayout.SOUTH );
            progressDialog.setVisible( true );
        }

    }

}
于 2013-02-18T13:11:17.220 回答
2

您最终将被 EDT 线程阻塞。你需要在后台完成你的任务，你会从那里更新你的进度条。

通过更新你的进度条，我的意思是，设置它的值。当您这样做时，GUI 会自动更新其在 EDT 线程中的视图。

于 2013-02-18T12:51:06.267 回答