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May 12th, 2010, 01:41 PM
#1
Can you return user action from ActionEvent?
Hello, I am working on a program and trying to add a GUI to it. I want the user to chose a directory for files to be run into the program. I am using a separate class for the GUI and I cant seem to pass the anything from ActionEvent to my main. Is this possible? My code is below. Any help or advice at all would be greatly appreciated.
Code:
public class GUIOptions extends JPanel
implements ActionListener {
static private final String newline = "\n";
JButton openButton;
JTextArea log;
JFileChooser fc;
public GUIOptions() {
super(new BorderLayout());
log = new JTextArea(25,50);
log.setMargin(new Insets(5,5,5,5));
log.setEditable(false);
JScrollPane logScrollPane = new JScrollPane(log);
fc = new JFileChooser();
//fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
openButton = new JButton("Chose a directory");
openButton.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(openButton);
add(buttonPanel, BorderLayout.PAGE_START);
add(logScrollPane, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e) {
//Handle open button action.
if (e.getSource() == openButton) {
int returnVal = fc.showOpenDialog(GUIOptions.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
File file = fc.getSelectedFile();
log.append("Opening: " + file.getName() + "." + newline);
// File[] testFiles = fc.getSelectedFiles();
//return testFiles;
} else {
log.append("Open command cancelled by user." + newline);
}
log.setCaretPosition(log.getDocument().getLength());
}
}
public static void createAndShowGUI() {
JFrame frame = new JFrame("TestMiningGui");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new GUIOptions());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
createAndShowGUI();
File[] testFiles = getFileListFromDirectory(This is where I cant get it to call the user specified directory);
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May 12th, 2010, 05:28 PM
#2
Re: Can you return user action from ActionEvent?
Your GUIOptions class doesn't have a method getFileListFromDirectory() and if it did it would have to be an instance method as the FileChooser is called from an instance method. This means your main method would need a reference to the GUIOptions instance so it can call the method. You also need an instance attribute to keep a record of what file/dir was selected so you can generate the file list.
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