Re: Using JFileChooser from modal dialog

From:
gosmith666@gmail.com
Newsgroups:
comp.lang.java.gui
Date:
Tue, 10 Sep 2013 12:26:37 -0700 (PDT)
Message-ID:
<c713853a-73c4-4bf3-9e9a-7abf98a52677@googlegroups.com>
On Thursday, February 9, 2012 12:59:29 PM UTC-5, FredK wrote:

How do I pop up and use a JFileChooser from a modal dialog?

I find the methods setModalExclusionType and setModalityType, but they

are methods of Window and Dialog; when I pop the file chooser using

showDialog(), how do I get access to the window or frame used to

display it so that I can set its modality?

--

Fred K


      try
      {
        // open a new file chooser dialog box.
        final JFileChooser aFileChooser = new JFileChooser();
        
        aFileChooser.setDragEnabled(false);
        aFileChooser.setDialogType(JFileChooser.OPEN_DIALOG);
        aFileChooser.setMultiSelectionEnabled(true);
        aFileChooser.setAcceptAllFileFilterUsed(true);
        aFileChooser.setApproveButtonText("Select");
        
        final JFrame aFrame = new JFrame("File Viewer");
        aFrame.getContentPane().add(aFileChooser, BorderLayout.CENTER);
        aFrame.pack();
        aFrame.setLocationRelativeTo(null);
        aFrame.setAlwaysOnTop(true);
        aFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        aFrame.setVisible(true);
              
        aFileChooser.addActionListener(new ActionListener()
        {
          @Override
          public void actionPerformed(ActionEvent e)
          {
            try
            {
              if ((e.getActionCommand()).equals(JFileChooser.APPROVE_SELECTION))
              {
                setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
                
                // user has selected a file
                File aFile = aFileChooser.getSelectedFile();

                // create text are to display the file
                JTextArea aText = new JTextArea();
                aText.setWrapStyleWord(true);
                aText.setEditable(false);
                aText.read(new FileReader(aFile.getAbsolutePath()), null);
                
                JScrollPane aScrollPane = new JScrollPane(aText);
           
                // display newly selected file in a seperate frame.
                JFrame aFrame2 = new JFrame(aFile.getName());
                aFrame2.getContentPane().add(aScrollPane, BorderLayout.CENTER);
                aFrame2.pack();
                aFrame2.setLocationRelativeTo(null);
                aFrame2.setAlwaysOnTop(true);
                aFrame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
                aFrame2.setVisible(true);
              }
              else
              {
                aFrame.dispose();
              }
            }
              
            catch (Exception ex)
            {
              setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
              Errors.displayErrorDialog(ex, "Exception");
            }
          }
        });
      }
      
      catch(Exception ex)
      {
        setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
        Errors.displayErrorDialog(ex, "Exception");
      }

This makes sure the File Chooser is Modal and AlwaysOnTop

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