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bjg

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JFileChooser question

I am using a JFileChooser to select a directory.  The problem is when I select the directory and then click on the approve button, nothing happens.  Here is the code I am using:

_fileChooser = new JFileChooser(System.getProperty("user.dir"));
_fileChooser.setApproveButtonText("Select");
_fileChooser.setDialogTitle("Select a directory");
_fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
_fileChooser.setFileFilter(new DirFileFilter());

class DirFileFilter extends FileFilter
    {
        public boolean accept(File f)
        {
            return f != null && f.isDirectory();
        }
               
        public String getDescription()
        {
            return "Directory";
        }
    }


protected void showFileChooser()
    {
        System.out.println("showFileChooser()");
        System.out.println("isDirectorySelectionEnabled = " + getFileChooser().isDirectorySelectionEnabled());
        int result = getFileChooser().showOpenDialog(this);
        System.out.println("result = " + result);
        if (result == JFileChooser.APPROVE_OPTION)
        {
            File f = getFileChooser().getSelectedFile();
            System.out.println("Selected directory = " + f);
        }
    }

What am I doing wrong?
Avatar of txholdem
txholdem
Have you tried this? replacing the APPROVE_OPTION block:

public void approveSelection(){
  File file = getSelectedFile();
  System.out.println("Selected directory = " + f);
}
Avatar of bjg
bjg

ASKER

I don't think you understand what is happening, when I click on the select button, NOTHING happens ... meaning the file dialog does not go away ... absolutely NOTHING happens.
Avatar of txholdem
txholdem
'void approveSelection()' works for me just fine. When I click on the select button of the filechooser, it executes what I put in the handler (approveSelection).
ASKER CERTIFIED SOLUTION
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txholdem
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Avatar of bjg
bjg

ASKER

So you are saying override public void approveSelection()?
Avatar of bjg
bjg

ASKER

I guess I am just not understanding what you are getting at ... when the user clicks on the approve button on the JFileChooser, I want the dialog to go away and the selected file should be set so when I call filechooser.getSelectedFile(), it returns the file (directory that I selected).
Avatar of txholdem
txholdem
yes, override public void approveSelection().

public void approveSelection(){
  File f = getSelectedFile();
  System.out.println("Selected directory = " + f);
  System.exit(0);
}
Avatar of rahul_bindu
rahul_bindu
Hi,
       I think that the problem is with your getFileChooser() method.if the code you posted in the beggning is the code in the method then probably you are returning a new instance of the FileChooser object.

ie if yur method is :-

private FileChooser getFileChooser()
{
     fileChooser = new JFileChooser     (System.getProperty("user.dir"));
_fileChooser.setApproveButtonText("Select");
_fileChooser.setDialogTitle("Select a directory");
_fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
_fileChooser.setFileFilter(new DirFileFilter());
return _fileChooser;
}

so every call to this returns a new instance.

If you have a condtion to check whether the _fileChooser already exists it mifht work

private FileChooser getFileChooser()
{
   if(_fileChooser == null)
  {
     fileChooser = new FileChooser                  System.getProperty("user.dir"));
      _fileChooser.setApproveButtonText("Select");
      _fileChooser.setDialogTitle("Select a directory");
     _fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
     _fileChooser.setFileFilter(new DirFileFilter());
  }
   
return _fileChooser;
}

Regards,
Rahul.
Avatar of bjg
bjg

ASKER

I do have a conditional check to see if it is null before creating a new instance of it, so that's not the problem ...
Avatar of bjg
bjg

ASKER

As for your suggesstion txholdem, I don't think that is the solution because I don't think that approveSelection is ever being called, otherwise the dialog box would disappear because the default implementation of approveSelection calls setVisible(false)
Avatar of jimmack
jimmack
Hi bjg,

  I'm not sure I can help, but could I clarify something please?

  This looks very similar to a problem I encountered recently.  I found that the approveSelection wasn't being called if there were no files in the directory.  If I selected a directory that did contain files, then it worked OK.  Could you confirm that this is the behaviour you are seeing?

  Thanx.

  Jim.
Avatar of bjg
bjg

ASKER

This is not the behavior I am seeing, it never calls approveSelection(), even if there are any files in the directory.
Avatar of jimmack
jimmack
Hi,

  OK.  I'll see if I can replicate the problem in another way.

  Thanx.

  Jim.
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