Include the class in your project, then create a new window in Interface Builder. Add a NSToolbar to the window, and set the toolbar’s class to SelectableToolbar.
Remove the default items from the toolbar and add new ones, being sure to set them as ‘Selectable’, and set their action to the change: method in the SelectableToolbar
In the window, add a tab view, and make the number of tabs equal to the number of items in your toolbar, and set the tabs to be at the bottom. Set your new tab view to resize with the window, position it in the top left corner and make it fill the whole window, also connect the SelectableToolbar’s tabview outlet to it. Now, populate your tab view’s tabs with appropriate controls and whatnot. When you finish a tab, select all its contents, and choose Layout > Embed Objects In > Custom View. This puts the contents of the tab in its own view, that the SelectableToolbar will use to determine the size of the window. So position the view in the top left corner, and change it’s autosizing so that it stays in the top left corner.

Completed Window (View from Interface Builder)

Keep in mind that, the size of the tab view and of the window doesn’t matter, so you can change it to help you lay things out, just keep the tab view in the top left corner. If you’ve set it up correctly, it should look something like to the right in Interface Builder
Download the Sample Project

.../usr/bin/ranlib: file: .libs/libgfortran.a(_dim_r16.o) has no symbols
/usr/bin/ranlib: file: .libs/libgfortran.a(_atan2_r16.o) has no symbols
/usr/bin/ranlib: file: .libs/libgfortran.a(_mod_r16.o) has no symbols
creating libgfortran.la
(cd .libs && rm -f libgfortran.la && ln -s ../libgfortran.la libgfortran.la)
make: *** [all] Error 2

arghh.. It fails to build gcc42 which is need for GCJ (A handy part of GCC that turns java class files into native machine code).  It seems to make sense that this utility would need it, being based on libraries written in Java? Okay, so I’ll just download GCC (it includes GCJ) and compile it myself.  I subversion’ed myself the newest copy of GCC’s source

svn checkout svn://gcc.gnu.org/svn/gcc/trunk gcc

I configured it to tell it where all my libraries were and where to install to (for me since I use macports this would be /opt/local), but not before installing its dependencies (libiconv, and mpfr), luckily these installed fine using macports. Then I ran make and waited…and waited..and waited for almost 3 HOURS!. sheesh. Apparently compilers are complicated or something. Anyway.. it was time to remember what I was doing and download Pdftk’s source.  I configured it to the correct paths once again, (so it can find the libraries it needs for GCJ and so forth).  I’m ready to make… and

gcj: error trying to exec 'ecj1': execvp: No such file or directory

What?? Okay after some googling I find out that actually GCJ doesn’t do the actual compiling of the java files into class files, it relies on some jar from eclipse that you can download the latest one here (warning ftp site) (Another pitfall here is that when downloading jar files your browser might append a .zip on the end, just delete the .zip, don’t try to unzip the file).  You can place that file anywhere (I put it in /opt/local/share/gcc-4.6.0/ and renamed it ecj.jar for simplicities sake).  It also needs a script called ecj1 with the contents as follows:

#!/bin/sh
gij -cp /opt/local/share/gcc-4.6.0/ecj.jar org.eclipse.jdt.internal.compiler.batch.GCCMain ${1+"$@"}

Of course change the path in the script to point to your ecj.jar file.  I put this script in /opt/local/bin, but you can put it in any folder in your PATH.  Okay now, back to pdftk…but things still aren’t going well.  Another make, although goes further, reveals that there is a problem with the makefile’s calling of gcjh, aww man.  Okay more googling produces a patch for this problem. I apply the patch with “patch -p0 < patch-filename”.  The patch doesn’t apply without errors of course.  I had to fix these manually, which isn’t too difficult, you just look at the .rej files and you can understand fairly easily the change they are indicating, if not read up on patch files a bit. Okay so things are looking good now, another make and the thing builds all the way to the end…. almost.

multiple definition of `java resource .dummy'

It fails to link all the compiled files together…  Argh… Okay so at least this is a know bug so there must be a fix right?  Well there is a temporary fix, that is to use the objcopy command from binutils to force the dummy resource to be local, but alas objcopy doesn’t seem to work on OS X, I even built it from the newest version of the source and it still doesn’t work.  The only way I found to fix this was to use a hex or text editor to rename the dummy resource.  That’s exactly what I ended up doing after failing to write a script to do it (all of the scripts I wrote ended up corrupting the file somehow).  I opened up all the .o files in the project with smultron and did a find and replace on each one (find: dummy replace: random 5-character string).  This is not the desired way of doing this since there are literally hundreds of them (I may be exaggerating).

Holy crap, that was a lot of work to compile pdftk.  If you’re planning to do the same I sympathise with you, (and let me know if you need any help since I’ve already done it.)  Although, for those of you out there with a 64-bit snow leopard system you can download this package I made of my binaries.  (they install to /usr/local/).  
Download the Package

I hope this helps someone not go through the same frustration I did.  If you have any issues with the package or compiling it.  Let me know I can lend a hand.

Completed Project

Recently I was working on a project where I wanted a certain effect. This was that I wanted the user to be able to delete items out of a table by clicking on the item and not having to add some button somewhere else to do it. So the answer was to put a button on the table to delete it. That was simple enough, just make a table with button cells, but it didn’t look very nice, it showed all the button when you could only delete one at a time. So thus, I decided to make the buttons only appear on the selected table items. Its simple, functional, and you can do it too if you just follow this short guide.

To tackle this problem, there are two “hacks” that we need to do.  First, we have to somehow make the NSButtonCell hide itself.  Next, we have to keep track of which row is selected, and tie that information back to our buttons. To accomplish the first task, will tie the button being hidden to it’s enabled value, since this way is easier then creating a new binding, and it doesn’t matter is the button is disabled if it’s hidden anyway.  Subclass NSButtonCell and override this method with this code.

- (void) drawWithFrame: (NSRect)cellFrame inView: (NSView*)controlView
{
	if([self isEnabled])
		[super drawWithFrame:cellFrame inView:controlView];
}

In interface builder, drag a NSButtonCell to one of the columns of your NSTableView. (Apple hides it as a ‘Check Box Cell’, see below, you have to change the type to ‘Momentary Push In’).

Check Box Cell (NSButtonCell)

Setting the Class to HidingButtonCell

Change the class to your custom subclass. Next we need to somehow get the data in a form we can bind to the button’s enabled key.  There are potentially a couple ways to do this, but I decided to subclass NSTableView, and override this method.

- (void)selectRowIndexes:(NSIndexSet *)indexes byExtendingSelection:(BOOL)extend
{
	[super selectRowIndexes:indexes byExtendingSelection:extend];
	[controller setSelectionIndex:[indexes firstIndex]];
 
	int i;
	for(i = 0; i < [[controller arrangedObjects] count]; i++)
	{
		[[[controller arrangedObjects] objectAtIndex:i] setObject:
			[NSNumber numberWithInt:[indexes firstIndex] == i] forKey:@"enabled"];
	}
 
}

Of, course this way of doing this assumes you’re binding to an NSArray of NSMutableDictionaries.  Next, back in Interface Builder we can bind the column to the new data that’s going to be generated with that method. And thats it enjoy you’re disappearing buttons.  If you want the button to delete the row, like mine, just connect the NSButtonCell’s action to the NSArrayController’s remove: method. If I made any mistakes, or made anything unclear, please leave a comment.  For a closer look, Download the Xcode Project

Sorry it took me so long to put it up.  Some things to note: It interfaces with Remi’s Chat Program in everything except that iOS doesn’t support the rich text.  You may notice if you download the project that I created a file called NSPatches, this was to allow for the iOS to properly unarchive some classes that it doesn’t have, most notably NSFont.  Other then that, from what I can tell ThoMoNetworking works flawlessly on iOS.  The only thing I couldn’t test was from iOS to iOS, since I lacked two iOS devices, but from iOS to OS X worked great, so I would assume it would work fine.  So here is the bulk of the code for you to peruse, and you can download the project underneath, enjoy!

P.S. Let me know if anybody runs into any issues with the code, I may be able to resolve them easily, since some crashes might just be due to iOS not having certain clases that OS X has, which a simple appending to the NSPatches file should fix.

//
//  Remi_s_Chat_AppViewController.m
//  Remi's Chat App
//
//  Created by Remi Bernotavicius on 7/18/10.
//  Copyright __MyCompanyName__ 2010. All rights reserved.
//
 
#import "Remi_s_Chat_AppViewController.h"
 
@implementation Remi_s_Chat_AppViewController
 
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/
 
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
 
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
 
	myServer = [[ThoMoServerStub alloc] initWithProtocolIdentifier:@"remischat"];
	[myServer setDelegate:self];
	[myServer start];
 
	myClient = [[ThoMoClientStub alloc] initWithProtocolIdentifier:@"remischat"];
	[myClient setDelegate:self];
	[myClient start];
 
	[[UIApplication sharedApplication] setDelegate:self];
}
 
- (void)applicationWillTerminate:(UIApplication *)application
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@" disconnected"]] autorelease];
	[temp appendAttributedString:[[[NSAttributedString alloc] initWithString:@"\n"] autorelease]];
	[myServer sendToAllClients:temp];
}
 
- (void)server:(ThoMoServerStub *)theServer acceptedConnectionFromClient:(NSString *)aClientIdString;
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@" connected"]] autorelease];
	[temp appendAttributedString:[[[NSAttributedString alloc] initWithString:@"\n"] autorelease]];
	[myServer send:temp toClient:aClientIdString];
}
 
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
 
- (void)didReceiveMemoryWarning {
	// Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
 
	// Release any cached data, images, etc that aren't in use.
}
 
- (void)viewDidUnload {
	// Release any retained subviews of the main view.
	// e.g. self.myOutlet = nil;
}
 
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
	CGRect newFrame = self.view.frame;
	if ([[UIApplication sharedApplication] statusBarOrientation]== UIInterfaceOrientationPortrait
		|| [[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortraitUpsideDown)
		newFrame.size.height -= 216;
	else
		newFrame.size.height -= 162;
 
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:0.3];
 
    [self.view setFrame:newFrame];
 
    [UIView commitAnimations];
}
 
-(IBAction)sendMessage:(id)sender
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@": "]] autorelease];
	[temp appendAttributedString:[[[NSMutableAttributedString alloc] initWithString:toSend.text] autorelease]];
	[temp appendAttributedString:[[[NSMutableAttributedString alloc] initWithString:@"\n"] autorelease]];
 
	[myServer sendToAllClients:temp];
	toSend.text = @"";
}
 
- (void)textFieldDidEndEditing:(UITextField *)textField
{
	CGRect newFrame = self.view.frame;
	if ([[UIApplication sharedApplication] statusBarOrientation]== UIInterfaceOrientationPortrait
		|| [[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortraitUpsideDown)
		newFrame.size.height += 216;
	else
		newFrame.size.height += 162;
 
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:0.3];
 
    [self.view setFrame:newFrame];
 
    [UIView commitAnimations];
}
 
-(void)server:(ThoMoServerStub *)theServer didReceiveData:(id)theData fromClient:(NSString *)aClientIdString {}
 
-(void)client:(ThoMoClientStub *)theClient didReceiveData:(id)theData fromServer:(NSString *)aServerIdString;
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithAttributedString:theData] autorelease];
	history.text = [history.text stringByAppendingString:[temp string]];
 
	[history scrollRangeToVisible:NSMakeRange([history.text length]-2, 1)];
}
 
- (void)dealloc {
    [super dealloc];
}
 
@end

Download the Xcode Project

With such a powerful framework at my disposal, I decided to test it out.  I wanted to see just how easy it would be to create my own ad-hoc chatting program.  I’ve included the source as well so you can test out the framework for yourselves.

I give you, Remi’s Chat Program

Since ThoMoNetworking lets you send any object, I was able to send NSAttributedString objects, so the text’s color and font are preserved.  I was also able to include recalling previously sent messages with the arrow keys (like in the terminal) and growl support as a superfluous features.  This seemingly complicated program is actually very little code.

//
//  Remi_s_Chat_ProgramAppDelegate.m
//  Remi's Chat Program
//
//  Created by Remi Bernotavicius on 6/1/10.
//  Copyright 2010 __MyCompanyName__. All rights reserved.
//
 
#import "Remi_s_Chat_ProgramAppDelegate.h"
 
@implementation Remi_s_Chat_ProgramAppDelegate
 
- (NSDictionary *) registrationDictionaryForGrowl {
	NSArray *array = [NSArray arrayWithObjects:@"new message", nil];
    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
                          [NSNumber numberWithInt:1],
                          @"TicketVersion",
                          array,
                          @"AllNotifications",
                          array,
                          @"DefaultNotifications",
                          nil];
    return dict;
}
 
-(void) growlAlert:(NSString *)message title:(NSString *)title{
    [GrowlApplicationBridge notifyWithTitle:title
								description:message
						   notificationName:@"new message"
								   iconData:[[[NSApplication sharedApplication] applicationIconImage] TIFFRepresentation]
								   priority:0
								   isSticky:NO
							   clickContext:@"bringFrontContext"];
}
 
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
	[GrowlApplicationBridge setGrowlDelegate:self];
 
	myServer = [[ThoMoServerStub alloc] initWithProtocolIdentifier:@"remischat"];
	[myServer setDelegate:self];
	[myServer start];
 
	myClient = [[ThoMoClientStub alloc] initWithProtocolIdentifier:@"remischat"];
	[myClient setDelegate:self];
	[myClient start];
 
	[[NSApplication sharedApplication] setDelegate:self];
	previousChats = [[NSMutableArray alloc] init];
	current = 0;
}
 
- (void)server:(ThoMoServerStub *)theServer acceptedConnectionFromClient:(NSString *)aClientIdString;
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@" connected"]] autorelease];
	[temp addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[NSFont boldSystemFontOfSize:12], NSFontAttributeName, nil] range:NSMakeRange(0, [temp length])];
	[temp appendAttributedString:[[[NSAttributedString alloc] initWithString:@"\n"] autorelease]];
	[myServer send:temp toClient:aClientIdString];
}
 
-(void)dealloc
{
	[previousChats release];
	[super dealloc];
}
 
-(void)retreat
{
	if(current < [previousChats count]) 	{ 		current++; 		[[toSend textStorage] setAttributedString:[previousChats objectAtIndex:current]]; 		if(current == [previousChats count]-1) 			[previousChats removeLastObject]; 	} } -(void)advance { 	 	if(current > 0 && [previousChats count] > 0)
	{
		if(current > [previousChats count]-1)
			[previousChats addObject:[[toSend attributedString] copy]];
		current--;
		[[toSend textStorage] setAttributedString:[previousChats objectAtIndex:current]];
	}
}
 
- (void)windowDidBecomeKey:(NSNotification *)notification
{
	[mainWindow makeFirstResponder:[toSend superview]];
}
 
-(IBAction)sendMessage:(id)sender
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@": "]] autorelease];
	[temp appendAttributedString:[toSend attributedString]];
 
	[previousChats addObject:[toSend attributedString]];
 
	if ([previousChats count] <= 10)
		current = [previousChats count];
	else
		[previousChats removeObjectAtIndex:0];
 
	NSString* t = [temp string];
	if(![[t substringWithRange:NSMakeRange([t length]-1, 1)] isEqual:@"\n"])
		[temp appendAttributedString:[[[NSAttributedString alloc] initWithString:@"\n"] autorelease]];
	[myServer sendToAllClients:temp];
	[[toSend textStorage] setAttributedString:[[[NSAttributedString alloc] initWithString:@""] autorelease]];
}
 
- (void) growlNotificationWasClicked:(id)clickContext{
	[[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
 
}
 
-(void)server:(ThoMoServerStub *)theServer didReceiveData:(id)theData fromClient:(NSString *)aClientIdString {}
 
-(void)client:(ThoMoClientStub *)theClient didReceiveData:(id)theData fromServer:(NSString *)aServerIdString;
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithAttributedString:[history attributedString]] autorelease];
	[temp appendAttributedString:theData];
	[[history textStorage] setAttributedString:temp];
 
	[history scrollRangeToVisible:NSMakeRange([[history textStorage] length], 0)];
 
	if(![mainWindow isKeyWindow])
	{
		[[NSApplication sharedApplication] requestUserAttention:NSCriticalRequest];
		[self growlAlert:[(NSAttributedString*)theData string] title:@"New Message"];
	}
}
 
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
	NSMutableAttributedString* temp = [[[NSMutableAttributedString alloc] initWithString:[NSFullUserName() stringByAppendingString:@" disconnected"]] autorelease];
	[temp appendAttributedString:[[[NSAttributedString alloc] initWithString:@"\n"] autorelease]];
	[temp addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[NSFont boldSystemFontOfSize:12], NSFontAttributeName, nil] range:NSMakeRange(0, [temp length])];
	[myServer sendToAllClients:temp];
 
	return NSTerminateNow;
}
 
@end

Download the Xcode Project

Let me know if there are any issues with the source, or if you would like to see more, like an iPhone OS example, just post a comment.

WikiTyper in Action

If you have any comments on the game please post them below. Some things I know are not working and I might fix in the future if people ask about them.  The words per minute is actual words per minute not the correct wpm, (if anyone knows the formula?)  Also occasionally it will display characters that you cannot type, but I couldn’t find a way to remedy that efficiently.  Finally, for those of you Linux and Windows users, a Java port is being made by someone else.  I will post a link if/when it is finished.

-(void)_setDisplayName:(NSString*)name
{
	//Hack Display Name to make KVO Compliant
	[self willChangeValueForKey:@"displayName"];
	[(YourClassNameHere*)super _setDisplayName:name];
	[self didChangeValueForKey:@"displayName"];
}

And that should be it. Note: I changed the method’s return type to void because otherwise it will create an error in the console about KVO compliant methods not being able to return anything other then void.

Also note that this is for read-only binding, to do a binding where you can change the value you have to implement and expose a new binding programmatically.

Apple’s Documentation on KVO

After researching the error, I came to the conclusion that it has to do with snow leopard upgrading CUPS. The newest version of CUPS, I read, requires that all the drivers’ files be owned by root. After investigating I found that Xerox’s PPD’s and plugins were NOT owned by root and thus causing the problem. To remedy this problem just type this command into the terminal:

sudo chown -R root:admin /Library/Printers

(The command might take a while to run.) This owns the /Library/Printers folder and everything in it to root, this could potentially fix many different printer software to work with snow leopard since it can effect pretty much any printer driver. So if you’re having problems try giving this a shot. Good luck.

First enable Gmail Contacts sync in Address Book by clicking Address Book > Preferences… > Accounts. Then click “On My Mac”, and then check the box next to synchronize with Google. After enabling it you will be prompted for your Gmail username and password. Then you should see a sync icon in your status bar. This lets you manually force a sync with google by clicking “sync now.” When it syncs you will probably have to resolve some ‘sync issues’ (basically deciding which contact is correct, the Gmail or Address Book version.)

If this icon annoys you, just hold down the apple key and drag it out of the bar to remove it, to put it back you can enable it in iSync.app’s preferences.

Now to tweak it. Your computer syncs your contacts in a job in that runs through a process called launchd (For those of you that don’t know, in Tiger and newer, launchd takes the job of cron on normal unix systems.) By default this process runs only once every hour, we are going to try and tweak this. To easily edit your loaded jobs, download Lingon from here http://sourceforge.net/projects/lingon/files/. Open up Lingon, on the left under ‘My Agents’ you should see ‘com.google.GoogleContactSyncAgent.’ Click this, and you here you are able to change it from running every hour to as little time as every second (although I don’t recommend this AT ALL.) Just adjust this setting to a shorter time period to speed it up. The real trick here though is that you can set something called a watch file/directory. This lets the process run when that file/directory has been modified. To make the sync run whenever you change one of your contacts you should just fill in under “Run when this file is modified” this file /Users/remi/Library/Application Support/AddressBook/AddressBook-v22.abcddb This file is your address book database, so hence it runs when you update the database. Remember that this makes your contacts instantly updated from your computer to google, but no the other way around. The frequency that the contacts come into your computer from google is determined by the “run it every” setting. I do not know why apple did not have the file set to watch the address book database to begin with, so I’m not sure if there are any adverse effects, but there has been none that I have experienced so far. Once you are finished editing the job, hit save, then log out and back in or restart for it to take effect. To try it out just edit one of your contacts in Address Book.app and see the update automatically appear on Gmail, and if you iPhone is synced to Gmail, then right to your iPhone.

Please post a comment if you have problems with this method, good luck everyone!