TweetFollow Us on Twitter

Dec 97 - Macintosh Q and A

Volume Number: 13 (1997)
Issue Number: 12
Column Tag: develop

Macintosh Q & A

by Apple Developer Support Center

White Backgrounds for Dialog editText Items

Q. I would like to have a colored background for my dialog box but I would like the TextEdit fields in my dialog box to be white. Is this possible to do? Is there some sample code available?

A. Generally speaking, this coloring is achieved via resources, not code. In addition to the dctb' resource, you need to create an 'ictb' resource.

To download a sample of an application using this kind of resource go to http://devworld.apple.com/dev/qa/tb/tb3.html.

The 'ictb' resource is documented on page 6-76 and starting again on page 6-158 of Inside Macintosh: Macintosh Toolbox Essentials. The best way I know of to create and edit 'ictb' resources is with Resorcerer, but you can also create them with a '.r' file compiled by either MPW's Rez or the Metrowerks CodeWarrior equivalent.

Here are some references to web sites for the aforementioned tools:

Resorcerer:
http://www.mathemaesthetics.com/
ETO (incl. Rez):
http://www.devtools.apple.com/eto/
CodeWarrior:
http://www.metrowerks.com/

If this response has failed to adequately address a question or has raised more questions than it answered, please feel free to let us know and we'll try again.

Pete Gontier


OTScheduleDeferredTask When Task Running

Q. What happens when you use OTScheduleDeferredTask to schedule a task that is running?

A. The "Open Transport Client Note" mentions that OTScheduleDeferredTask returns false when you attempt to schedule a task that is already scheduled, but it doesn't say anything about what happens if the task is running. It turns out that a task that is running is not consider to be scheduled, so OTScheduleDeferredTask will successfully reschedule it.

Quinn "The Eskimo!"


Gestalt Values for Recent Macintosh Models

Q. What are the 'mach' gestalt values for the recent Macintosh models?

A. Recently, we announced the following new Macintosh models:

PowerBook 2400

The following list includes the 'mach' gestalt selectors for these and other Macintosh systems which are not included in the Gestalt.h header file which is part of the "Universal Interfaces 2.1 in MPW Latest" on ETO #22.

  • gestaltPerforma5300 = 41; { Macintosh Performa 53xx }
  • gestaltPowerMac5260 = 41; { Power Macintosh 5260/100 }
  • gestaltPerforma6300 = 42; { Macintosh Performa 63xx, except 6360 }
  • gestaltPerforma6360 = 58; { Performa 6360 }
  • gestaltPerforma6400 = 58; { Performa 6400 }
  • gestaltPowerMac9600 = 67; { Power Macintosh 9600
  • gestaltPowerMac7600 = 68; { Power Macintosh 7600 }
  • gestaltPowerMac8600 = 69; { Power Macintosh 8600 }
  • gestaltPowerMac5400 = 74; { Power Macintosh 5400/120}
  • gestaltMacLC580 = 99; { Macintosh LC 580 }
  • gestaltPerforma580 = 99; { Macintosh Performa 580 }
  • gestaltPowerMacLC475 = 104; { Mac LC 475 & PPC Processor Upgrade Card }
  • gestaltPowerMacPerforma47x = 104; { Performa 47x & PPC Proc Upgrade Card }
  • gestaltPowerMacLC575 = 105; { Mac LC 575 & PPC Processor Upgrade Card }
  • gestaltPowerMacPerforma57x = 105; { Performa 57x & PPC Proc Upgrade Card }
  • gestaltPowerMacQuadra630 = 106; { Quadra 630 & PPC Processor Upgrade Card }
  • gestaltPowerMacLC630 = 106; { Mac LC 630 & PPC Processor Upgrade Card }
  • gestaltPowerMac7300 = 109; { Power Macintosh 7300 }
  • gestaltPowerMacQuadra700 = 116; { Quadra 700 & Power PC Upgrade Card }
  • gestaltPowerMacQuadra900 = 117; { Quadra 900 & Power PC Upgrade Card }
  • gestaltPowerMacQuadra950 = 118; { Quadra 950 & Power PC Upgrade Card }
  • gestaltPowerMacCentris610 = 119; { Centris 610 & Power PC Upgrade Card }
  • gestaltPowerMacCentris650 = 120; { Centris 650 & Power PC Upgrade Card }
  • gestaltPowerMacQuadra610 = 121; { Quadra 610 & Power PC Upgrade Card }
  • gestaltPowerMacQuadra650 = 122; { Quadra 650 & Power PC Upgrade Card }
  • gestaltPowerMacQuadra800 = 123; { Quadra 800 & Power PC Upgrade Card }
  • gestaltPowerBook3400 = 306; { Macintosh PowerBook 3400 }
  • gestaltPowerBook2400 = 307; { Macintosh PowerBook 2400 }
  • gestaltPowerBook1400 = 310; { Macintosh PowerBook 1400 }
  • gestaltPowerMac5500 = 512; { Power Macintosh 5500 }
  • gestalt20thAnnivMac = 512; { Twentieth Anniversary Macintosh }
  • gestaltPowerMac5500 = 512; { Power Macintosh 5500 }
  • gestaltPowerMac6500 = 513; { Power Macintosh 6500 }
  • gestaltPowerMac4400 = 515; { Power Macintosh 4400 }

Note: To distinguish the Twentieth Anniversary Macintosh from the Power Macintosh 5500, make a secondary Gestalt selector call to the selector 'bxid'. The response for a Twentieth Anniversary Macintosh will be 0x0000302B

Rich Kubota


Find Desktop Folder

Q. The General control panel (GCP) in 7.6, 7.6.1 and 8.0 has the document options: Last folder, Application set folder, and Documents folder. How can my application determine where this folder is?

A. The General control panel (GCP) patches FindFolder so it will return the correct document folder given the current GCP options. Pass FindFolder a folderType of 'docs'. One quick note: Because the GCP patches FindFolder, the createFolder option doesn't work. If the folder doesn't exist you won't get an error and it won't be created. You have to write code to determine if the folder actually exist: if it doesn't, you'll have to create it yourself.

George Warner


MemError

Q. When I am debugging my application MemError() always returns noErr. What's wrong with MemError()?

A. Nothing, if you are debugging your application with a high level debugger. High level debuggers often call Memory Manager routines while stepping through your code. When a Memory Manager routine is called, it sets MemError() and in this case, the debugger's memory request was successful (it returned noErr) and cleared your application's MemError() result.

The solution to this problem is often just to not step over Memory Manager calls and the call to MemError(). If you put a break point just after the MemError() call, you usually get the correct error -- the one your application would see if it wasn't running in the debugger.

The other option is to use a low level debugger such as MacsBug to debug your memory allocation problems.

As a general rule your application should check the value of the handle or pointer returned by NewHandle, NewPtr, etc: and if it is nil, you should call MemError() for an error number. Just calling MemError() without checking the value of the handle/pointer is not a good idea.

Mark Cookson

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

EtreCheck 3.4.2 - For troubleshooting yo...
EtreCheck is an app that displays the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to... Read more
Hopper Disassembler 4.2.10- - Binary dis...
Hopper Disassembler is a binary disassembler, decompiler, and debugger for 32- and 64-bit executables. It will let you disassemble any binary you want, and provide you all the information about its... Read more
VueScan 9.5.81 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
iFFmpeg 6.4.2 - Convert multimedia files...
iFFmpeg is a comprehensive media tool to convert movie, audio and media files between formats. The FFmpeg command line instructions can be very hard to master/understand, so iFFmpeg does all the hard... Read more
Fantastical 2.4.1 - Create calendar even...
Fantastical 2 is the Mac calendar you'll actually enjoy using. Creating an event with Fantastical is quick, easy, and fun: Open Fantastical with a single click or keystroke Type in your event... Read more
Fantastical 2.4.1 - Create calendar even...
Fantastical 2 is the Mac calendar you'll actually enjoy using. Creating an event with Fantastical is quick, easy, and fun: Open Fantastical with a single click or keystroke Type in your event... Read more
Live Home 3D Pro 3.2.2 - $69.99
Live Home 3D Pro, a successor of Live Interior 3D, is the powerful yet intuitive home design software that lets you build the house of your dreams right on your Mac. It has every feature of Live Home... Read more
Live Home 3D Pro 3.2.2 - $69.99
Live Home 3D Pro, a successor of Live Interior 3D, is the powerful yet intuitive home design software that lets you build the house of your dreams right on your Mac. It has every feature of Live Home... Read more
FileZilla 3.27.0.1 - Fast and reliable F...
FileZilla (ported from Windows) is a fast and reliable FTP client and server with lots of useful features and an intuitive interface. Version 3.27.0.1: MSW: Add misssing file to .zip binary package... Read more
Spotify 1.0.59.395. - Stream music, crea...
Spotify is a streaming music service that gives you on-demand access to millions of songs. Whether you like driving rock, silky R&B, or grandiose classical music, Spotify's massive catalogue puts... Read more

Latest Forum Discussions

See All

The best deals on the App Store this wee...
There are quite a few truly superb games on sale on the App Store this week. If you haven't played some of these, many of which are true classics, now's the time to jump on the bandwagon. Here are the deals you need to know about. [Read more] | Read more »
Realpolitiks Mobile (Games)
Realpolitiks Mobile 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: PLEASE NOTE: The game might not work properly on discontinued 1GB of RAM devices (iPhone 5s, iPhone 6, iPhone 6 Plus, iPad... | Read more »
Layton’s Mystery Journey (Games)
Layton’s Mystery Journey 1.0.0 Device: iOS Universal Category: Games Price: $15.99, Version: 1.0.0 (iTunes) Description: THE MUCH-LOVED LAYTON SERIES IS BACK WITH A 10TH ANNIVERSARY INSTALLMENT! Developed by LEVEL-5, LAYTON’S... | Read more »
Full Throttle Remastered (Games)
Full Throttle Remastered 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Originally released by LucasArts in 1995, Full Throttle is a classic graphic adventure game from industry legend Tim... | Read more »
Stunning shooter Morphite gets a new tra...
Morphite is officially landing on iOS in September. The game looks like the space shooter we've been needing on mobile, and we're going to see if it fits the bill quite shortly. The game's a collaborative effort between Blowfish Studios, We're Five... | Read more »
Layton's Mystery Journey arrives to...
As you might recall, Layton's Mystery Journey is headed to iOS and Android -- tomorrow! To celebrate the impending launch, Level-5's released a new trailer, complete with an adorable hamster. [Read more] | Read more »
Sidewords (Games)
Sidewords 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Grab a cup of coffee and relax with Sidewords. Sidewords is part logic puzzle, part word game, all original. No timers. No... | Read more »
Noodlecake Games' 'Leap On!...
Noodlecake Games is always good for some light-hearted arcade fun, and its latest project, Leap On! could carry on that tradition. It's a bit like high stakes tetherball in a way. Your job is to guide a cute little blob around a series of floating... | Read more »
RuneScape goes mobile later this year
Yes, RuneScape still exists. In fact, it's coming to iOS and Android in just a few short months. Jagex, creators of the hit fantasy MMORPG of yesteryear, is releasing RuneScape Mobile and Old School RuneScape for mobile devices, complete with... | Read more »
Crash of Cars wants you to capture the c...
Crash of Cars is going full on medieval in its latest update, introducing castles and all manner of new cars and skins fresh from the Dark Ages. The update introduces a new castle-themed map (complete with catapults) and a gladiator-style battle... | Read more »

Price Scanner via MacPrices.net

Apple Move Away from White Label Event Apps C...
DoubleDutch, Inc., a global provider of Live Engagement Marketing (LEM) solutions, has made a statement in the light of a game-changing announcement from Apple at this year’s WWDC conference.... Read more
70 Year Old Artist Creates Art Tools for the...
New Hampshire-based developer Pirate’s Moon has announced MyArtTools 1.1.3, the update to their precision drawing app, designed by artist Richard Hoeper exclusively for use with the 12.9-inch iPad... Read more
Sale! New 2017 13-inch 2.3GHz MacBook Pros fo...
Amazon has new 2017 13″ 2.3GHz/128GB MacBook Pros on sale today for $150 off MSRP including free shipping. Their prices are the lowest available for these models from any reseller: – 13″ 2.3GHz/128GB... Read more
13″ 2.3GHz/128GB Space Gray MacBook Pro on sa...
MacMall has the 13″ 2.3GHz/128GB Space Gray MacBook Pro (MPXQ2LL/A) on sale for $1219 including free shipping. Their price is $80 off MSRP. Read more
Clearance 2016 12-inch Retina MacBooks, Apple...
Apple recently dropped prices on Certified Refurbished 2016 12″ Retina MacBooks, with models now available starting at $1019. Apple will include a standard one-year warranty with each MacBook, and... Read more
Save or Share
FotoJet Designer, is a simple but powerful new graphic design apps available on both Mac and Windows. With FotoJet Designer’s 900+ templates, thousands of resources, and powerful editing tools you... Read more
Logo Maker Shop iOS App Lets Businesses Get C...
A newly released app is designed to help business owners to get creative with their branding by designing their own logos. With more than 1,000 editable templates, Logo Maker Shop 1.0 provides the... Read more
Sale! New 15-inch MacBook Pros for up to $150...
Amazon has the new 2017 15″ MacBook Pros on sale for up to $150 off MSRP including free shipping: – 15″ 2.8GHz MacBook Pro Space Gray: $2249 $150 off MSRP – 15″ 2.89Hz MacBook Pro Space Gray: $2779 $... Read more
DEVONthink To Go 2.1.7 For iOS Brings Usabili...
DEVONtechnologies has updated DEVONthink To Go, the iOS companion to DEVONthink for Mac, with enhancements and bug fixes. Version 2.1.7 adds an option to clear the Global Inbox and makes the grid... Read more
15-inch 2.2GHz Retina MacBook Pro, Apple refu...
Apple has Certified Refurbished 2015 15″ 2.2GHz Retina MacBook Pros available for $1699. That’s $300 off MSRP, and it’s the lowest price available for a 15″ MacBook Pro. An Apple one-year warranty is... Read more

Jobs Board

Frameworks Engineering Manager, *Apple* Wat...
Frameworks Engineering Manager, Apple Watch Job Number: 41632321 Santa Clara Valley, California, United States Posted: Jun. 15, 2017 Weekly Hours: 40.00 Job Summary Read more
Product Manager - *Apple* Pay on the *Appl...
Job Summary Apple is looking for a talented product manager to drive the expansion of Apple Pay on the Apple Online Store. This position includes a unique Read more
*Apple* Retail - Multiple Positions - Apple...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
*Apple* Retail - Multiple Positions - Apple...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Senior Payments Architect - *Apple* Pay - A...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.