Swing/ProgressComboBox のバックアップの現在との差分(No.1)

• バックアップ一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• バックアップ を表示
• Swing/ProgressComboBox へ行く。

• category: swing folder: ProgressComboBox title: JComboBox内にJProgressBarを表示 tags: [JComboBox, ListCellRenderer, JProgressBar, SwingWorker] author: aterai pubdate: 2011-09-05T17:17:06+09:00 description: JComboBox内にJProgressBarを設定して進捗を表示します。 image: hreflang:

     href: https://java-swing-tips.blogspot.com/2011/09/jprogressbar-in-jcombobox.html
     lang: en

概要

• &jnlp;
• &jar;
• &zip;

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  Download

  • Runnable JAR example.jar
  • Source code src.zip
  • Repository GitHub

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#spanend
#spanadd
class ProgressCellRenderer extends DefaultListCellRenderer {
#spanend
  private final JProgressBar bar = new JProgressBar() {
    @Override public Dimension getPreferredSize() {
      return ProgressCellRenderer.this.getPreferredSize();
    }
  };

#spandel
**サンプルコード [#xbdbd6e8]
#spanend
#spandel
#code{{
#spanend
#spandel
class ProgressCellRenderer extends DefaultListCellRenderer {
#spanend
  private final JProgressBar bar = new JProgressBar();
  @Override public Component getListCellRendererComponent(
      JList list, Object value, int index,
      boolean isSelected, boolean cellHasFocus) {
    if(index<0 && worker!=null && !worker.isDone()) {
    if (index < 0 && worker != null && !worker.isDone()) {
      bar.setFont(list.getFont());
      bar.setBorder(BorderFactory.createEmptyBorder(0,0,0,0));
      bar.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
      bar.setValue(count);
      return bar;
    }else{
    } else {
      return super.getListCellRendererComponent(
          list,value,index,isSelected,cellHasFocus);
        list, value, index, isSelected, cellHasFocus);
    }
  }
#spanadd

#spanend
  @Override public void updateUI() {
    super.updateUI();
    if(bar!=null) SwingUtilities.updateComponentTreeUI(bar);
    if (bar != null) {
      SwingUtilities.updateComponentTreeUI(bar);
    }
  }
}

• ロードボタンが押されたら以下のようなSwingWorkerでJComboBoxにアイテムを追加

button = new JButton(new AbstractAction("load") {
  @Override public void actionPerformed(ActionEvent e) {
    button.setEnabled(false);
    combo.setEnabled(false);
    combo.removeAllItems();
    worker = new SwingWorker<String, String>() {
      private int max = 30;
      @Override public String doInBackground() {
      @Override public String doInBackground() throws InterruptedException {
        int current = 0;
        while(current<=max && !isCancelled()) {
          try {
            Thread.sleep(50);
            //setProgress(100 * current / max);
            count = 100 * current / max;
            publish("test: "+current);
          }catch(Exception ie) {
            return "Exception";
          }
        while (current <= max && !isCancelled()) {
          Thread.sleep(50);
          // setProgress(100 * current / max);
          count = 100 * current / max;
          publish("test: "+current);
          current++;
        }
        return "Done";
      }
      @Override protected void process(java.util.List<String> chunks) {
        DefaultComboBoxModel m = (DefaultComboBoxModel)combo.getModel();
        for(String s: chunks) {
#spanadd

#spanend
      @Override protected void process(List<String> chunks) {
        DefaultComboBoxModel m = (DefaultComboBoxModel) combo.getModel();
        for (String s: chunks) {
          m.addElement(s);
        }
        combo.setSelectedIndex(-1);
        combo.repaint();
      }
#spanadd

#spanend
      @Override public void done() {
        String text = null;
        if(!isCancelled()) {
        if (!isCancelled()) {
          combo.setSelectedIndex(0);
        }
        combo.setEnabled(true);
        button.setEnabled(true);
        count = 0;
      }
    };
    worker.execute();
  }
});

• DefaultListCellRenderer (Java Platform SE 8)