(Hopefully simple) Help in Java please!

Discussion in 'Mac Programming' started by Awesomeness, Mar 10, 2009.

  1. macrumors member

    Joined:
    Feb 12, 2009
    #1
    Sorry, It's me and my compression program again :)

    Ok, so all I have left to do is make it so that it works and decompresses when I double click on a .cmprzz file. So, I've registered the extension in the Info.plist and it works fine, but I can't seem to get my application to USE it. It's going to be hard to explain it to you, so I'll post the whole thing:


    Code:
    package compression;
    
    import java.io.*;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import com.apple.eawt.Application;
    import com.apple.eawt.ApplicationEvent;
    import com.apple.eawt.ApplicationListener;
    
    
    
    /*
     * Comprezzor.java uses these files:
     *   images/Open.gif
     *   images/Save.gif
     */
    
    public class Comprezzor extends JPanel
    			implements ActionListener, ApplicationListener {
    	static private final String newline = "\n";
    	JButton comprezzButton, decomprezzButton;
    	JTextArea log;
    	JFileChooser fc;
    	ApplicationListener appListener;
    
    
    	public Comprezzor() {
    		super(new BorderLayout());
    
    		//Create the log first, because the action listeners
    		//need to refer to it.  We format the log here.
    		log = new JTextArea(12,30);
    		log.setLineWrap(true);
    		log.setWrapStyleWord(true);
    		log.setMargin(new Insets(5,5,5,5));
    		log.setEditable(false);
    		JScrollPane logScrollPane = new JScrollPane(log);
    		logScrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    		logScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
    		log.append("Welcome to Comprezzor v1.0.  This program sucks.  It might not even work anyway." + newline + newline);
    
    		log.setCaretPosition(log.getDocument().getLength());
    
    		//Create a file chooser
    		fc = new JFileChooser();
    		fc.setMultiSelectionEnabled(false);
    		fc.setFileSelectionMode(JFileChooser.FILES_ONLY);
    
    
    
    		//Create the comprezz button.
    		comprezzButton = new JButton("Comprezz File...",
    								 createImageIcon("images/Open.gif"));
    		comprezzButton.addActionListener(this);
    
    		//	  Create the decomprezz button.
    		decomprezzButton = new JButton("Decomprezz File...",
    								 createImageIcon("images/Save.gif"));
    		decomprezzButton.addActionListener(this);
    
    		//For layout purposes, put the buttons in a separate panel
    		JPanel buttonPanel = new JPanel(); //use FlowLayout
    		buttonPanel.add(comprezzButton);
    		buttonPanel.add(decomprezzButton);
    
    		//Add the buttons and the log to this panel.
    		add(buttonPanel, BorderLayout.PAGE_START);
    		add(logScrollPane, BorderLayout.CENTER);
    	}
    	String fileText = null;
    	String filePath = null;
    	String text = null;
    
    	public void MacOSAppAdapter() {
    		appListener = new MyAppEventHandler();
    	}
    
    	/** Method to register this handler with Apple's event manager, calling
    	 * addApplicationListener in parent class.
    	 */
    	public void register() {
    		addApplicationListener(appListener);
    	}
    
    	class MyAppEventHandler implements ApplicationListener {
    		public void handleOpenApplication(ApplicationEvent event) {
    		}
    
    		public void handleAbout(ApplicationEvent arg0) {
    			// TODO Auto-generated method stub
    			
    		}
    
    		public void handleOpenFile(ApplicationEvent event) {
    			try {
    				File file = event.//HELP!  How do I get the file path?!
    				log.append("Now decomprezzing: " + file.getName() + "." + newline);
    				filePath = file.getAbsolutePath();
    				log.append("Opening file..." + newline);
    				fileText = Opener.readFile(filePath);
    				fileText = JDecompress.decompress(fileText);
    				log.append("Decomprezzing..." + newline);
    				log.append("Writing file..." + newline);
    				Writer.Save(file, fileText);
    				file.setName(file.getName().split(".cmprzz")[0]);
    				log.append("Done!" + newline + newline);
    			}
    			catch (Throwable t) {
    				log.append("Didn't work =(" + newline + newline);
    			}
    			
    			
    		}
    
    		public void handlePreferences(ApplicationEvent arg0) {
    			// TODO Auto-generated method stub
    			
    		}
    
    		public void handlePrintFile(ApplicationEvent arg0) {
    			// TODO Auto-generated method stub
    			
    		}
    
    		public void handleQuit(ApplicationEvent arg0) {
    			// TODO Auto-generated method stub
    			
    		}
    
    		public void handleReOpenApplication(ApplicationEvent arg0) {
    			// TODO Auto-generated method stub
    			
    		}
    	}
    
    
    	public void actionPerformed(ActionEvent e) {
    		//Handle open button action.
    		if (e.getSource() == comprezzButton) {
    			fc.setDialogTitle("Comprezz File");
    			int returnVal = fc.showOpenDialog(Comprezzor.this);
    			if (returnVal == JFileChooser.APPROVE_OPTION) {
    				//This is where a real application would open the file.
    				try {
    					File file = fc.getSelectedFile();
    					log.append("Now comprezzing: " + file.getName() + "." + newline);
    					fc.setCurrentDirectory(new File("."));
    					fc.showOpenDialog(null);
    					filePath = file.getAbsolutePath();
    					fileText = Opener.readFile(filePath);
    					log.append("Done!" + newline + newline);
    				}
    				catch (Throwable t) {
    					log.append("Didn't work =(" + newline + newline);
    				}
    			} else {
    				log.append("Comprezz command cancelled." + newline + newline);
    			}
    			log.setCaretPosition(log.getDocument().getLength());
    
    
    		}
    
    		//Handle save button action.
    		else if (e.getSource() == decomprezzButton) {
    			fc.setDialogTitle("Decomprezz File");
    			int returnVal = fc.showOpenDialog(Comprezzor.this);
    			if (returnVal == JFileChooser.APPROVE_OPTION) {
    				//This is where a real application would save the file.
    				try {
    					File file = fc.getSelectedFile();
    					log.append("Now decomprezzing: " + file.getName() + "." + newline);
    					fc.setCurrentDirectory(new File("."));
    					filePath = file.getAbsolutePath();
    					log.append("Opening file..." + newline);
    					fileText = Opener.readFile(filePath);
    					fileText = JDecompress.decompress(fileText);
    					log.append("Decomprezzing..." + newline);
    					log.append("Writing file..." + newline);
    					Writer.Save(file, fileText);
    					file.setName(file.getName().split(".cmprzz")[0]);
    					log.append("Done!" + newline + newline);
    				}
    				catch (Throwable t) {
    					log.append("Didn't work =(" + newline + newline);
    				}
    			} else {
    				log.append("Decomprezz command cancelled." + newline + newline);
    			}
    			log.setCaretPosition(log.getDocument().getLength());
    		}
    	}
    
    	/** Returns an ImageIcon, or null if the path was invalid. */
    	protected static ImageIcon createImageIcon(String path) {
    		java.net.URL imgURL = Comprezzor.class.getResource(path);
    		if (imgURL != null) {
    			return new ImageIcon(imgURL);
    		} else {
    			System.err.println("Couldn't find file: " + path);
    			return null;
    		}
    	}
    
    	/**
    	 * Create the GUI and show it.  For thread safety,
    	 * this method should be invoked from the
    	 * event dispatch thread.
    	 */
    	private static void createAndShowGUI() {
    		//Create and set up the window.
    		JFrame frame = new JFrame("Comprezzor");
    		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    		//Add content to the window.
    		frame.add(new Comprezzor());
    
    		//Display the window.
    		frame.pack();
    		frame.setVisible(true);
    	}
    
    	public static void main(final String args[]) {
    		//Schedule a job for the event dispatch thread:
    		//creating and showing this application's GUI.
    		SwingUtilities.invokeLater(new Runnable() {
    			public void run() {
    				//Turn off metal's use of bold fonts
    				UIManager.put("swing.boldMetal", Boolean.FALSE);
    				createAndShowGUI();
    			}
    		});
    	}
    
    	public void handleAbout(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handleOpenApplication(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handleOpenFile(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handlePreferences(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handlePrintFile(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handleQuit(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    
    	public void handleReOpenApplication(ApplicationEvent arg0) {
    		// TODO Auto-generated method stub
    
    	}
    }
    Eclipse forced me to add those thingies with the TODO crap... I don't want them! I have a limited understanding of creating .app applications. This code has a few errors in it. setName doesn't work/exist either! I just want it to open double clicked .cmprzz files, decompress them, and remove the .cmprzz.

    This is so hard :(
     
  2. macrumors regular

    Joined:
    Feb 22, 2008
    #2
    Before I look through the code to try to see what is happening, thought I would point out that the // TODO ... stubs are just put in there by Eclipse to remind you that those methods were auto-added and you may want to do stuff with them. It's more of a friendly reminder to you, but you can definitely just get rid of them.

    But now I'll try to look through the code and see what is up.
     

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