Swing/PinTabbedPane のバックアップ(No.5)

JCheckBoxMenuItem pinTabMenuItem = new JCheckBoxMenuItem(new AbstractAction("pin tab") {
  @Override public void actionPerformed(ActionEvent e) {
    JTabbedPane t = (JTabbedPane)getInvoker();
    JCheckBoxMenuItem check = (JCheckBoxMenuItem)e.getSource();
    int idx       = t.getSelectedIndex();
    Component cmp = t.getComponentAt(idx);
    Component tab = t.getTabComponentAt(idx);
    Icon icon     = t.getIconAt(idx);
    String tip    = t.getToolTipTextAt(idx);
    boolean flg   = t.isEnabledAt(idx);

    int i;
    if(check.isSelected()) {
      for(i=0;i<idx;i++) {
        String s = t.getTitleAt(i);
        if(s==null || s.length()==0) continue;
        break;
      }
    }else{
      for(i=t.getTabCount()-1;i>idx;i--) {
        String s = t.getTitleAt(i);
        if(s!=null && s.length()>0) continue;
        break;
      }
    }
    t.remove(idx);
    t.insertTab(check.isSelected()?"":tip, icon, cmp, tip, i);
    t.setTabComponentAt(i, tab);
    t.setEnabledAt(i, flg);
    if(flg) t.setSelectedIndex(i);
  }
});