Java JOptionPane Prompt promptForDatsDir(Component parentComponent)

Description

Modally prompts the user for the FTL resources dir.

License

Open Source License

Parameter

Parameter	Description
parentComponent	a parent for Swing dialogs, or null

Declaration

public static File promptForDatsDir(Component parentComponent) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.Component;
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;

public class Main {
    /**/*from w  ww  .j  a va  2s  .c om*/
     * Modally prompts the user for the FTL resources dir.
     *
     * Reminder: GUI dialogs need to be in the event dispatch thread.
     *
     * @param parentComponent
     *            a parent for Swing dialogs, or null
     */
    public static File promptForDatsDir(Component parentComponent) {
        File result = null;

        String message = "";
        message += "You will now be prompted to locate FTL manually.\n";
        message += "Select '(FTL dir)/resources/data.dat'.\n";
        message += "Or 'FTL.app', if you're on OSX.";
        JOptionPane.showMessageDialog(parentComponent, message, "Find FTL",
                JOptionPane.INFORMATION_MESSAGE);

        final JFileChooser fc = new JFileChooser();
        fc.setDialogTitle("Find data.dat or FTL.app");
        fc.setFileHidingEnabled(false);
        fc.addChoosableFileFilter(new FileFilter() {
            @Override
            public String getDescription() {
                return "FTL Data File - (FTL dir)/resources/data.dat";
            }

            @Override
            public boolean accept(File f) {
                return f.isDirectory() || f.getName().equals("data.dat")
                        || f.getName().equals("FTL.app");
            }
        });
        fc.setMultiSelectionEnabled(false);

        if (fc.showOpenDialog(parentComponent) == JFileChooser.APPROVE_OPTION) {
            File f = fc.getSelectedFile();
            if (f.getName().equals("data.dat")) {
                result = f.getParentFile();
            } else if (f.getName().endsWith(".app") && f.isDirectory()) {
                File contentsPath = new File(f, "Contents");
                if (contentsPath.exists() && contentsPath.isDirectory()
                        && new File(contentsPath, "Resources").exists())
                    result = new File(contentsPath, "Resources");
            }
        }

        if (result != null && isDatsDirValid(result)) {
            return result;
        }

        return null;
    }

    /**
     * Confirms the FTL resources dir exists and contains the dat files.
     */
    public static boolean isDatsDirValid(File d) {
        if (!d.exists() || !d.isDirectory())
            return false;
        if (!new File(d, "data.dat").exists())
            return false;
        if (!new File(d, "resource.dat").exists())
            return false;
        return true;
    }
}

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