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

Notability 4.2.2 - Note-taking and annot...
Notability is a powerful note-taker to annotate documents, sketch ideas, record lectures, take notes and more. It combines, typing, handwriting, audio recording, and photos so you can create notes... Read more
Adobe Acrobat Reader 20.006.20034 - View...
Adobe Acrobat Reader allows users to view PDF documents. You may not know what a PDF file is, but you've probably come across one at some point. PDF files are used by companies and even the IRS to... Read more
Adobe Acrobat DC 20.006.20034 - Powerful...
Acrobat DC is available only as a part of Adobe Creative Cloud, and can only be installed and/or updated through Adobe's Creative Cloud app. Adobe Acrobat DC with Adobe Document Cloud services is... Read more
Day One 4.8 - Maintain a daily journal.
Day One is an easy, great-looking way to use a journal / diary / text-logging application. Day One is well designed and extremely focused to encourage you to write more through quick Menu Bar entry,... Read more
OmniPlan 3.14 - Professional-grade proje...
With OmniPlan, you can create logical, manageable project plans with Gantt charts, schedules, summaries, milestones, and critical paths. Break down the tasks needed to make your project a success,... Read more
calibre 4.11.0 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more
Tinderbox 8.5.0 - Store and organize you...
Tinderbox is a personal content management assistant. It stores your notes, ideas, and plans. It can help you organize and understand them. And Tinderbox helps you share ideas through Web journals... Read more
OmniPlan Pro 3.14 - Professional-grade p...
With OmniPlan Pro, you can create logical, manageable project plans with Gantt charts, schedules, summaries, milestones, and critical paths. Break down the tasks needed to make your project a success... Read more
Amazon Chime 4.30.7368 - Communications...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
Adobe Premiere Pro CC 2020 14.0.2 - Digi...
Premiere Pro CC 2020 is available as part of Adobe Creative Cloud for as little as $52.99/month. The price on display is a price for annual by-monthly plan for Adobe Premiere Pro only Adobe Premiere... Read more

Latest Forum Discussions

See All

Marvel Strike Force introduces new brawl...
FoxNext's squad-based RPG Marvel Strike Force is set to receive some fresh characters from the X-Men and Iron Man series. They'll arrive as part of the game's latest update, which follows a sizable spending boycott on the title due to complaints... | Read more »
Speed Dating for Ghosts is a narrative a...
Speed Dating for Ghosts originally released on Steam back 2018, since then it has received honourable mentions for narrative during the Independent Games Festival. Now it's made its way over to iOS devices where it's available as a premium title... | Read more »
Fast-paced multiplayer title Tennis Star...
Tennis Stars: Ultimate Clash is the latest free-to-play tennis title to hit iOS and Android. It's said to be a fairly casual experience, offering easy-to-learn controls and fast-paced, mobile-friendly matches. [Read more] | Read more »
Super Mecha Champions' latest updat...
Super Mecha Champions' latest update sees the addition of a brand new character called R.E.D. Alongside that, there's news about the current season and a series of Emojis that have been added to the game. [Read more] | Read more »
Isle Escape: The House is an upcoming pu...
Isle Escape: The House is an upcoming puzzle game from Simeon Angelov that's intended to serve as an introduction to a saga they're planning on releasing in an episodic fashion. The first chapter is set to release for both iOS and Android on 29th... | Read more »
Company of Heroes, the classic RTS, is n...
Feral Interactive has finally released their highly anticipated iOS version of the strategy classic Company of Heroes. It's available now for iPad as a premium title and has had various tweaks to ensure that it's optimised for touch controls. [... | Read more »
Mario Kart Tour's Vancouver Tour ha...
With Mario Kart Tour's Valentine's Tour now at an end (suspiciously before Valentine's Day has even arrived), it's now time to move on to the all-new and exciting Vancouver Tour. This time around, the featured drivers are Hiker Wario and Aurora... | Read more »
A new PictoQuest update makes it a much...
PictoQuest is a charming little puzzle game, but it left us a little disappointed. The game just didn’t seem to use screen space effectively, to the point that using the touch controls (as opposed to the default virtual d-pad) could lead to errant... | Read more »
Alley is an atmospheric adventure game a...
Alley is an atmospheric adventure game that sees you playing as a young girl trapped in an inescapable nightmare. Surrounded by her worst fears, every step forward for her is a huge challenge that you'll help guide her through using some simple... | Read more »
Fight monsters and collect heroes in Cry...
From Final Fantasy to Chaos Rings, Japanese roleplaying games have found a large and loyal fanbase on mobile devices. If you’re seeking a more under-the-radar JRPG to escape into, Lionsfilm’s Cryptract could be the one. The game has been around... | Read more »

Price Scanner via MacPrices.net

$749 MacBook Airs continue to be available on...
Amazon has the 2017 13″ 1.8GHz/128GB MacBook Air on sale today for only $749 shipped. That’s $250 off Apple’s original MSRP for this model and the cheapest new MacBook available from any Apple... Read more
HomePods on sale for $204 at Other World Comp...
Other World Computing has discounted, new, Apple HomePods on sale for up to $95 off Apple’s MSRP: – HomePod Space Gray: $207.99 $92 off MSRP – HomePod White: $204.99 $95 off MSRP These are the same... Read more
Get a Certified Refurbished iMac at Apple for...
Apple has Certified Refurbished 2019 21″ & 27″ iMacs available starting at $929 and up to $350 off the cost of new models. Apple’s one-year warranty is standard, shipping is free, and each iMac... Read more
A Look Back At The Top 5 Most Read Stories Of...
FEATURE: 02.21.20 The best of the best are now history and we’re not talking about Super Bowl LIV from earlier this month but rather, coverage from the past year (its second and first full one at... Read more
Apple offers wide range of discounted custom...
Save up to $610 on a custom-configured 21″ or 27″ iMac with these Certified Refurbished models available at Apple. Each iMac features a new outer case, free shipping, and includes Apple’s standard 1-... Read more
Find the best prices and sales on Macs, iPads...
Our Apple award-winning price trackers are the best place to look for the best New Year’s deals and lowest prices on Apple gear. Scan our price trackers for the latest information on sales, bundles,... Read more
Apple’s 27″ 8-Core iMac Pro on sale today for...
B&H Photo has the base 8-Core 3.2GHz 32GB/1TB iMac Pro on sale today for $4599 — $400 off Apple’s MSRP. Overnight shipping is free to many addresses in the US: – 8-Core 3.2GHz 32GB/1TB iMac Pro... Read more
In stock! Apple’s new Mac Pro for $5995 with...
Apple reseller DataVision has the new 2019 Apple Mac Pro in stock today for $5995 ($5 off MSRP) including free shipping. DataVision charges sales tax for NY, NJ, PA, and CA residents only. If you don... Read more
Apple offers 2019 13″ MacBook Pros for up to...
Apple has a full line of Certified Refurbished 2019 13″ 2.4GHz 4-Core Touch Bar MacBook Pros available starting at $1529 and up to $300 off MSRP. Apple’s one-year warranty is included, shipping is... Read more
Save up to $200 on a 13″ MacBook Air at Apple...
Apple has a full line of Certified Refurbished 2019 13″ MacBook Airs available starting at only $929 and up to $200 off the cost of new Airs. Each MacBook features a new outer case, comes with a... Read more

Jobs Board

Best Buy *Apple* Computing Master - Best Bu...
**745058BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Store Associates **Store NUmber or Department:** 001080-Lake Charles-Store **Job Read more
Sales Supervisor - *Apple* Blossom Mall - J...
Sales Supervisor - Apple Blossom Mall Location:Winchester, VA, United States- Apple Blossom Mall 1850 Apple Blossom Dr Job ID:1083621Store Hourly Positions Read more
Geek Squad Advanced Repair *Apple* Professi...
**763700BR** **Job Title:** Geek Squad Advanced Repair Apple Professional **Job Category:** Store Associates **Store NUmber or Department:** 000660-Natomas-Store Read more
Medical Assistant - *Apple* Valley Clinic -...
…professional, quality care to patients in the ambulatory setting at the M Health Fairview Apple Valley Clinic, located in Apple Valley, MN. Join the **M Health Read more
*Apple* Mobility Sales Professional - Best B...
**763669BR** **Job Title:** Apple Mobility Sales Professional **Job Category:** Store Associates **Store NUmber or Department:** 000851-Santana Row-Store **Job Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.