/*

File: SheetTest.java

Abstract: Testcase for the Sheets-in-Java support class.  Receives source/destination filenames

    from the NSOpenPanel/NSSavePanel sheets that are shown, and displays the filenames in a 

    JOptionPane to demonstrate that the information was successfully passed from Cocoa.

Version: 1.0

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*/ 

package apple.dts.samplecode.jsheets;

import java.awt.Toolkit;

import java.awt.event.*;

import java.io.File;

import javax.swing.*;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import com.apple.eawt.*;

import apple.dts.samplecode.jsheets.event.*;

public class SheetTest extends JFrame implements ActionListener, OpenSheetListener, SaveSheetListener {

    protected JMenu fileMenu;

    protected JMenuBar jmb;

    protected JMenuItem openMI, saveMI;

    public static boolean ON_MAC_OS_X = false;

    public static boolean TIGER14_OR_LATER = false;

    private static Class sheetDelegateClass;

    private static Method openSheetMethod, saveSheetMethod;

    public SheetTest () {

        super("Sheets in Swing");

        jmb = new JMenuBar();

        fileMenu = new JMenu("File");

        openMI = new JMenuItem("Open...");

        openMI.addActionListener(this);

        openMI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));

        saveMI = new JMenuItem("Save...");

        saveMI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));

        saveMI.addActionListener(this);

        fileMenu.add(openMI);

        fileMenu.add(saveMI);

        jmb.add(fileMenu);

        setJMenuBar(jmb);

        setSize(320, 240);

    }

    // If the JSheetDelegate loaded successfully, we're on Mac OS X Tiger and can

    // make the calls to show sheets; otherwise show the standard JFileChooser

    public void actionPerformed(ActionEvent ae) {

        if (ae.getSource() == openMI) {         

            if (sheetDelegateClass != null && openSheetMethod != null) {

                Object[] args = { this, this };

                try {

                    openSheetMethod.invoke(sheetDelegateClass, args);

                    return;

                } catch (Exception ex) {

                    ex.printStackTrace();

                    // do not return; fall back to JFileChooser below

                }

            }

            JFileChooser jfc = new JFileChooser();

            jfc.setMultiSelectionEnabled(true);

            jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);

            int result = jfc.showOpenDialog(this);

            if (result == JFileChooser.APPROVE_OPTION) {

                openFiles(jfc.getSelectedFiles());

            } else if (result == JFileChooser.CANCEL_OPTION) {

                dialogCancelled();

            }

        } else {

            if (sheetDelegateClass != null && saveSheetMethod != null) {

                Object[] args = { this, this };

                try {

                    saveSheetMethod.invoke(sheetDelegateClass, args);

                    return;

                } catch (Exception ex) {

                    ex.printStackTrace();

                    // do not return; fall back to JFileChooser below

                }

            }   

            JFileChooser jfc = new JFileChooser();

            int result = jfc.showSaveDialog(this);

            if (result == JFileChooser.APPROVE_OPTION) {

                saveFile(jfc.getSelectedFile());

            } else if (result == JFileChooser.CANCEL_OPTION) {

                dialogCancelled();

            }       

        }

    }

    public void openFiles(String[] filePaths) {

        String list = "";

        for (int i = 0; i < filePaths.length; i++) {

            list += filePaths[i] + "\n";

        }

        JOptionPane.showMessageDialog(this, list);

    }

    public void openFiles(File[] files) {

        String list = "";

        for (int i = 0; i < files.length; i++) {

            list += files[i].getAbsolutePath() + "\n";

        }

        JOptionPane.showMessageDialog(this, list);

    }

    public void saveFile(File newFile) {

        saveFile(newFile.getAbsolutePath());

    }

    public void saveFile(String filename) {

        JOptionPane.showMessageDialog(this, filename);  

    }

    public void dialogCancelled() {

        System.out.println("User cancelled open/save");

    }

    /*

     * SheetListener methods for open/save/cancel

     * Defer to pure-Java file handling above

     */

    public void openSheetFinished(SheetEvent se) {

        openFiles(se.getFilenames());

    }

    public void saveSheetFinished(SheetEvent se) {

        saveFile(se.getFilename());

    }

    public void sheetCancelled() {

        dialogCancelled();

    }

    public static void main(String[] args) {

        ON_MAC_OS_X = System.getProperty("os.name").toLowerCase().startsWith("mac os x");

        float osVersion = Float.parseFloat(System.getProperty("os.version").substring(0, 4));

        float javaVersion = Float.parseFloat(System.getProperty("java.version").substring(0,3));

        TIGER14_OR_LATER = ON_MAC_OS_X && (osVersion >= 10.4f) && (javaVersion >= 1.4f);

        // Only load this class if on Mac OS X Tiger; this prevents the native library from 

        // being loaded on the wrong platforms

        // Also load the necessary methods for showing our sheets; these will also be called reflectively

        if (TIGER14_OR_LATER) {

            try {

                sheetDelegateClass = ClassLoader.getSystemClassLoader().loadClass("apple.dts.samplecode.jsheets.JSheetDelegate");

                Class[] defArgs = { java.awt.Frame.class, OpenSheetListener.class };

                openSheetMethod = sheetDelegateClass.getDeclaredMethod("showOpenSheet", defArgs);

                defArgs[1] = SaveSheetListener.class;

                saveSheetMethod = sheetDelegateClass.getDeclaredMethod("showSaveSheet", defArgs);

            } catch (Exception ex) {

                ex.printStackTrace();

            }

        }

        new SheetTest().setVisible(true);

    }

}