TweetFollow Us on Twitter

March 96 - Letters


d e v e l o p is absolutely the coolest publication for a Mac developer. I thought I would drop a line to say "thanks" for putting the next issue up on the Web a full month before it will arrive at my home. At least this way I can get a partial fix! Good job!
-- Rob Newberry

I just noticed that you've released d e v e l o p Issue 24 online. I'm a subscriber, yet I have to call or send e-mail to you each time to remind you to send my issue! Your magazine is terrific, but the service is quite the opposite.
-- Carl Limisco

As a service to developers who may want access to content as soon as it's finalized, develop content is uploaded to the Web within three days of issue completion. The print and CD-ROM production processes, however, consume more time and thus result in the delay between when you may first see content on the Web and when you receive your copy with its CD in the mail.

In the case of Issue 24, this period was extended due to technical dif ficulties with generating the mailing information. Starting with Issue 23, we switched to APDA for distribution of develop. There have been a few snags in the transition, but we're confident that subscribers will experience improved service. Meanwhile, we apologize for any problems.
-- Diane Wilcox

When I received develop Issue 24, I was shocked to find a bug in the Puzzle Page. When BAL is explain- ing how LockPixels and UnlockPixels work, he mentions that the PixMap baseAddr can be either a handle or a pointer, and that a flag in rowBytes identifies which state the baseAddr is in. This is wrong; that information is stored in the pmVersion field of the PixMap. There aren't any bits to spare in rowBytes. Other than that, it was a great Puzzle Page, as usual.
-- Cameron Esfahani

You're right; you caught this slip-up by the puzzlemeisters themselves. Say, if you're so good, why not write your own Puzzle Page? [Readers: See the puzzle Cameron coauthors in this issue.]
-- Caroline Rose

The code accompanying Norman Franke's article on multipane dialogs (develop Issue 23) is great. I had it up and running in a PowerPlant application in less than an hour. But I found some bugs; for example, in the routines T2PMPDAction and friends, you lock down theData, and I suspect you should be locking down tmpData. Before I get down and dirty, I was wondering if y ou knew of any other bugs already pre - sent.

Also, the code needs an extra routine to generate the data handle without displaying the dialog so that one might set the initial values (as opposed to using factory defaults).

When I get the PowerPlant classes working and debugged, I'd like to distribute them on the Internet (free). May I include your code (possibly modified)? Again, thanks for a great article.

-- Gordon Watts

Norman has provided a newer version of his code as of Issue 24's CD. He' s fixed a lot of bugs and also now provides PowerPlant classes; see the README file for details.

You may redistribute the MPDialogs source if you like, as long as it's part of your own thing and not just a redistribution of the original package. For instance, you'll probably not be distributing Norman' s sample or its source, but just the files MPDialogs.c and MPDialogs.h. Please include a pointer to where they came from, since presumably the code will change over time (bug fixes and so on).

By the way, you can contact Norman directly at
-- Dave Johnson


The observant among you will notice a change in Technical Notes on this issue's CD (and on the World Wide Web and the other myriad places where they can be found). The old Macintosh Technical Notes are still around, but now there are also new Notes, going simply by the name "Technotes." The old Notes will eventually evolve into the new scheme. We talked with Technote leader Tom Maremaa, from Apple's Developer Technical Support group, for the scoop on this.

"The old Notes have a rich and varied history at Apple, and have served developers well in the past," Tom said. "We wanted to continue that tradition -- but with changes, something on the order of Technotes: The Next Generation."

First, Tom hopes you'll agree that the biggest improvement is in the quality of the new Technotes. They receive far more review by Apple engineers than the old Notes did, and they're better edited and formatted, so you should find them a lot more readable and reliable. Technotes will also be timelier: more of them will focus on hot new technologies, such as QuickTime VR and QuickDraw 3D, with updates and additions posted regularly on the Web at They'll migrate to develop's CD and other such locations, but you'll no longer have to wait that long for the latest and greatest information.

You'll notice that Technotes are numbered sequentially, starting from 1001, rather than divided into functional categories. Tom found that placing a Note into a single category was becoming increasingly difficult and arbitrary; often a topic would span more than one category or wouldn't quite fit into any existing category. Locating a Note on a particular subject is easier than ever thanks to the improved searching tools that are now available: you can use Acrobat's search mechanism on the CD or the excellent search facility provided on Apple's Web pages.

"Providing developers with the ability to search fast and ef fectively through the whole body of Technotes, particularly on the Web," said Tom, "has been a major goal in the project. It's there now. Check it out!"

The old Macintosh Technical Notes are gradually being cleaned up: over time they'll be updated and worked into the new scheme, or deleted if obsolete. Should you look for an old Note by category and number, you'll find a "stub" indicating its current status if it's been revised or removed. In particular, the old Q&A Technical Notes are being dis- continued; new Q&As are being released as "Macintosh Technical Q&As" (they're on the Web at

For those of you who like to have Notes in printed form, you can still order a printed copy (of both the old and the new Notes). See the Technotes Web page or the latest Apple Developer Catalog for details.

Finally, Tom would like to point out that Technotes can be submitted by outside authors (although Caroline asks that you first consider whether develop might be a more appropriate vehicle for your handiwork :-). If your Note is published, you'll receive YATS (Yet Another T-Shirt) along with some other goodies, including a chance to participate in Apple developer kitchens and other special events. For more information, or just to let us know what you think of all these changes, write to AppleLink DEVFEEDBACK (

SEND US YOUR EXCUSE FOR NOT WRITING Well, actually, we'd rather receive letters regarding articles published in develop. Letters should be addressed to Caroline Rose -- or, if technical develop-related questions, to Dave Johnson -- at AppleLink CROSE or JOHNSON.DK (Internet or All letters should include your name and company name as well as your address and phone number. Letters may be excerpted or edited for clarity (or to make them say what we wish they did). Please send all subscription-related queries to AppleLink APDA (Internet *


Community Search:
MacTech Search:

Software Updates via MacUpdate

World of Tanks Generals guide - Tips and...
World of Tanks Generals is a brand new card game by the developer behind the World of Tanks shooter franchise. It plays like a cross between chess and your typical card game. You have to keep in consideration where you place your tanks on the board... | Read more »
TruckSimulation 16 guide: How to succeed...
Remember those strangely enjoyable truck missions in Grand Theft Auto V whereit was a disturbing amount of fun to deliver cargo? TruckSimulation 16 is reminiscent of that, and has you play the role of a truck driver who has to deliver various... | Read more »
The best GIF making apps
Animated GIFs have exploded in popularity recently which is likely thanks to a combination of Tumblr, our shorter attention spans, and the simple fact they’re a lot of fun. [Read more] | Read more »
The best remote desktop apps for iOS
We've been sifting through the App Store to find the best ways to do computer tasks on a tablet. That gave us a thought - what if we could just do computer tasks from our tablets? Here's a list of the best remote desktop apps to help you use your... | Read more »
Warhammer 40,000: Freeblade guide - How...
Warhammer 40,000: Freebladejust launched in the App Store and it lets you live your childhood dream of blowing up and slashing a bunch of enemies as a massive, hulking Space Marine. It's not easy being a Space Marine though - and particularly if... | Read more »
Gopogo guide - How to bounce like the be...
Nitrome just launched a new game and, as to be expected, it's a lot of addictive fun. It's called Gopogo, and it challenges you to hoparound a bunch of platforms, avoiding enemies and picking up shiny stuff. It's not easy though - just like the... | Read more »
Sago Mini Superhero (Education)
Sago Mini Superhero 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: KAPOW! Jack the rabbit bursts into the sky as the Sago Mini Superhero! Fly with Jack as he lifts impossible weights,... | Read more »
Star Wars: Galaxy of Heroes guide - How...
Star Wars: Galaxy of Heroes is all about collecting heroes, powering them up, and using them together to defeat your foes. It's pretty straightforward stuff for the most part, but increasing your characters' stats can be a bit confusing because it... | Read more »
The best cooking apps (just in time for...
It’s that time of year again, where you’ll be gathering around the dinner table with your family and a huge feast in front of you. [Read more] | Read more »
Square Rave guide - How to grab those te...
Square Rave is an awesome little music-oriented puzzle game that smacks of games like Lumines, but with its own unique sense of gameplay. To help wrap your head around the game, keep the following tips and tricks in mind. [Read more] | Read more »

Price Scanner via

13-inch 128GB MacBook Air now on sale for $79...
Best Buy has just lowered their price on the 2015 13″ 1.6GHz/128GB MacBook Air to $799.99 on their online store for Cyber Monday. Choose free shipping or free local store pickup (if available). Sale... Read more
Best Buy lowers 13-inch MacBook Pro prices, n...
Best Buy has lowered prices on select 13″ MacBook Pros this afternoon. Now save up to $200 off MSRP for Cyber Monday on the following models. Choose free shipping or free local store pickup (if... Read more
Cyber Monday: Apple MacBooks on sale for up t...
Apple resellers have MacBook Pros, MacBook Airs, and MacBooks on sale for up to $250 off MSRP for Cyber Monday 2015. The following is a roundup of the lowest prices available for new models from any... Read more
Cyber Monday: Apple Watch on sale for up to $...
B&H Photo has the Apple Watch on sale for Cyber Monday for $50-$100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - Apple Watch Sport: $50 off - Apple Watch: $50-$100 off B... Read more
Cyber Monday: 15% off Apple products, and sto...
Use code CYBER15 on Cyber Monday only to take 15% on Apple products at Target, and store-wide. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-... Read more
iPad Air 2 And iPad mini Among Top Five Black...
Adobe has released its 2015 online shopping data for Black Friday and Thanksgiving Day. The five best selling electronic products on Black Friday were Samsung 4K TVs, Apple iPad Air 2, Microsoft Xbox... Read more
All-in-one PC Shipments Projected To Drop Ove...
Digitimes’ Aaron Lee and Joseph Tsai report that all-in-one (AIO) PC shipments may drop a double-digit percentage on-year in 2015 due to weaker-than-expected demand, although second-largest AIO make... Read more
Sprint Offers iPad Pro
Sprint now offers Apple’s new iPad Pro with Wi-Fi + Cellular, featuring a 12.9-inch Retina display with 5.6 million pixels. Customers can pick up iPad Pro at select Sprint retail locations. It can... Read more
Cyber Monday: Target offers 15% discount on A...
Target has discounted Apple Watches by 15% for Cyber Monday. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary: - Apple... Read more
Sunday roundup of Holiday weekend Mac sales:...
Take up to $500 off MSRP on the price of a new Mac at B&H Photo today as part of their Black Friday/Holiday weekend sale. Shipping is free, and B&H charges NY tax only. These prices are... Read more

Jobs Board

*Apple* Site Security Manager - Apple (Unite...
# Apple Site Security Manager Job Number: 42975010 Culver City, Califo ia, United States Posted: Oct. 2, 2015 Weekly Hours: 40.00 **Job Summary** The Apple Site Read more
iOS Wallet & *Apple* Pay Engineer - App...
# iOS Wallet & Apple Pay Engineer Job Number: 40586801 Santa Clara Valley, Califo ia, United States Posted: Nov. 16, 2015 Weekly Hours: 40.00 **Job Summary** The iOS Read more
*Apple* Online Store Expansion - Apple (Unit...
# Apple Online Store Expansion Job Number: 41191932 Santa…1, 2015 Weekly Hours: 40.00 **Job Summary** The Online Apple Store is seeking a person to lead its Read more
Software Engineer, *Apple* Watch - Apple (U...
# Software Engineer, Apple Watch Job Number: 38181776 Santa Clara Valley, Califo ia, United States Posted: Nov. 2, 2015 Weekly Hours: 40.00 **Job Summary** The Apple Read more
Technical Program Manager, Strategic Merchant...
# Technical Program Manager, Strategic Merchants - Apple Pay Job Number: 44001177 Santa Clara Valley, Califo ia, United States Posted: Oct. 30, 2015 Weekly Hours: 40.00 Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.