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Renaming a CellRenderer Element

I created my own CellRenderer that includes several rows and a JProgressBar in a JList element ... But a JProgressBar, and so the whole JList element will be drawn once, and I'm looking for a way to recolor the elements. I tried to start a thread that would constantly redraw ... But I don’t know what I need to redraw in order to get the result ...

JList repaint ... no result CellRenderer redraws ... no result JFrame repaint ... no result

Does anyone understand my problem and know the solution?

Many thanks!

UPDATE: [Update removed]

NEXT UPDATE:

import java.awt.Component;
import java.awt.Dimension;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.ListCellRenderer;


public class Main extends JFrame{

public DefaultListModel contentListModel = new DefaultListModel();
public MyCellRenderer MCR = new MyCellRenderer();
public JList contentList = new JList(contentListModel);

public Main(){
    super("Example");
    setMinimumSize(new Dimension(300,300));
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    contentList.setCellRenderer(MCR);
    contentListModel.addElement("");
    contentListModel.addElement("");
    add(contentList);
}

public static void main(String[] args){
    new Main().setVisible(true);
}

class MyCellRenderer extends JPanel implements ListCellRenderer{

    public MyCellRenderer(){
        JProgressBar jpb = new JProgressBar();
        jpb.setIndeterminate(true);
        add(jpb);
    }

    @Override
    public Component getListCellRendererComponent(JList arg0, Object arg1,
            int arg2, boolean arg3, boolean arg4) {
        // TODO Auto-generated method stub
        return this;
    }



}

}
+5
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5 answers

javax.swing.Timer ProgressBarUI, ; incrementAnimationIndex() , .

image

, ProgressIcon DefaultListCellRenderer; JTabbedPane.

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+3

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public static class ProgressBarRenderer implements TableCellRenderer {

    /** The bar. */
    private JProgressBar indeterminate = new JProgressBar() {
        // fake displayable to trigger ui animation
        @Override
        public boolean isDisplayable() {
            return true;
        };
    };

    /** The bar. */
    private JProgressBar determinate = new JProgressBar() ;

    public ProgressBarRenderer() {
        indeterminate.setStringPainted(true);
        indeterminate.setIndeterminate(true);
        indeterminate.setString(null);
    }    

    @Override
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {
        int pbi = (Integer) value;
        if (pbi < 0) {
            return indeterminate;
        }
        determinate.setValue(pbi);
        return determinate;
    }
}

// a timer driving the animation
Action update = new AbstractAction() {

    int count;
    @Override
    public void actionPerformed(ActionEvent e) {
        table.setValueAt(-1, 0, AncientSwingTeam.INTEGER_COLUMN);
    }

};
new Timer(100, update).start();
+3

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import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.ListCellRenderer;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestProgressListCellRenderer {

    public static void main(String[] args) {
        new TestProgressListCellRenderer();
    }

    public TestProgressListCellRenderer() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                final DefaultListModel<Float> model = new DefaultListModel<>();
                model.addElement(0f);

                JList<Float> list = new JList<>(model);
                list.setCellRenderer(new ProgressListCellRenderer());

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new JScrollPane(list));
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                Timer timer = new Timer(125, new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        float value = model.getElementAt(0);
                        value += 0.01;
                        if (value >= 1f) {
                            value = 1f;
                            ((Timer)e.getSource()).stop();
                        }
                        model.setElementAt(value, 0);
                    }
                });
                timer.setRepeats(true);
                timer.setCoalesce(true);
                timer.start();

            }
        });
    }

    public class ProgressListCellRenderer extends JProgressBar implements ListCellRenderer<Float> {

        @Override
        public Component getListCellRendererComponent(JList<? extends Float> list, Float value, int index, boolean isSelected, boolean cellHasFocus) {
            setValue(Math.round(value * 100));
            return this;
        }            
    }        
}

, setIndeterminate, ( ),

+2

  • +1 ,

  • Renderer Swing , , , ,

  • , JProgressBar.setIndeterminate(true);, ,

    • JProgressBar

    • ListCellRenderer, JProgressBar, JPanel, .

  • , JList JComponents, JTable / JTableHeader

  • JPanel ( GridLayout) JProgressBars JProgressBar.setIndeterminate(true);, GUI Swing JTable ( JTableHeader JList)

+2

.

public void updateListData(final JList myList) {
  SwingUtilities.invokeLater(new Runnable() {
    public void run() {
      ListModel lm = myList.getModel();
      DefaultListModel dlm = new DefaultListModel();
      for (int i = 0; i < lm.getSize(); i++) {
        dlm.addElement(lm.getElementAt(i));
      }
      myList.setModel(dlm);
    }
  });
}

The above code can be called from EDT and from another thread. But you should also read how to work with Swing components and understand models (ListModel, TableModel, etc.). To ask an element in JList to redraw, you must change its object in the model.

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