TweetFollow Us on Twitter

Feb 89 Letters
Volume Number:5
Issue Number:2
Column Tag:Letters

Letters

By David E. Smith, Editor & Publisher, MacTutor

Invention Software Programmer’s Extender

The Resolution !!!

Dale C. Quantz

The following letter is the response to a letter published in the October 1988 issue of MacTutor. In this letter a Programmer’s Extender user (Warren Michelsen) listed a number of problems he was having with his Programmer’s Extender libraries as well as our response to his inquiries. Invention Software does acknowledge that there was a problem with the resizing of a TextEdit’s destination rectangle when using either the zoom or grow boxes. This bug ONLY occurs in the LSP version of the Extender Volume 1. The bug was inadvertently introduced when a user requested code that would resize a TextEdit’s destRect during a zoom or grow operation. Prior to this we had told other users to implement this feature in the UserHooks (named: UserGrow & UserZoom). After sending a piece of code to a user who was having trouble implementing the above mentioned functionality, the code was accidentally integrated into the LSP release versions. Up until Mr. Michelsen’s letter (he did not telephone us) we were unaware of the problem. We attempted to reproduce his reported bug and were unable to do so. We had not been aware of the problem and/or could not produce the desired affect. We then informed Mr. Michelson that we could not reproduce the bug. It was not until Mr. Michelsen’s second correspondence that we were able to reproduce the problem. The bug appears to have become more pronounced in the later system versions (most likely because of the numerous bug fixes to TextEdit).

In any case, we have completely rewritten the text editing in the Pascal Extender versions and have sent Mr. Michelsen a version of the Extender with the latest code. If any other users are encountering similar problems with the Extender’s implementation of TextEdit (apart from the 32,000 character limit which is inherent in TextEdit) please contact our technical support staff between the hours of 8:30am - 5:00pm EST.

Update to Event Simulator

Matthew Snyder

Fairfield, CA

Another weekend, another thought about Event Simulator. This thought is a minor one, though, and I’m not even sure if it’s significant enough to merit a change. [This letter refers to a program published in the January 1989 issue of MacTutor. -Ed]

The change would be a minor one, too. Right before the heading How the Demo Works and right after that long paragraph about memory, I would add this paragraph:

"I could have avoided the memory problem by using PPostEvent instead of Enqueue. PPostEvent takes an event type and message as arguments, and creates an event using current mouse position, modifier keys, etc., posts the event, and returns to you a pointer to the new queue element. You can then use that pointer to modify the event to your liking. However, I found this method unsatisfactory for a general library because the size of the Event Queue Buffer limits you to 20 consecutive events."

I was trying to imagine what type of critical letters I could expect from readers, and it occurred to me that anyone that’s done this kind of thing before has probably used PPostEvent. “Why didn’t you use PPostEvent? Don’t you have a copy of Inside Mac IV? It’s easy. Here’s how ” The disclaimer above explains why I didn’t use PPostEvent.

[Thank you, Matthew, for your update. Matthew is one of the more concientuous writers, always thinking about his article, even after it has been submitted. Unfortunately, this letter came to me just as I was proofing the final proofs of the journal. -KC]

MacFortran/020 Math Library

Tatsuhito Koya

Evanston, IL

Being a student, I have been on a tight budget lately. I had to terminate most of my magazine subscriptions, but I have decided to keep MacUser, Computer Shopper, and MacTutor. These three magazines have been the main sources of information about what is happening in the world of personal computing--the world of the Macintosh, specifically.

I am not a computer science major; hence, it is difficult for me to find time to develop my programming skill, yet I do have opportunities to use computers for engineering computations. I do most of my computations on the main frame, but I would really like to use my Mac as well. I have MacFortran/020, but the problem is that I cannot find a math library for it anywhere. Moreover, Edit text editor is not one of the best program editors around. I would really appreciate it if you could recommend me a good math library (modifiable preferred) and a program editor.

[ I called Absoft to check on the math library; unfortunately, they knew of none, but they seemed to like the idea; maybe our readers know of a library out there, or will create one. -KC]

[As for a text editor, I would suggest a new Fortran specific editor called FREDITOR 1.0 from Battelle Pacific Northwest Laboratories, PO Box 999, Richland, WA 99352. Our good friend Bill Rausch wrote the manual. The editor was written in Lishgtspeed C and used the LS CAPPS Editor construction kit. The product is distributed by TechAlliance. Look for it in MacTutor's Mail Order Store real soon now. -Ed]

IAC Driver

Lawrence D’Oliveiro

Hamilton, New Zealand

I read the articles on the IAC driver by Frank Alviani and Paul Snively with great interest. The Mac certainly needs a capability like this. However, a couple of questions.

First of all, why does the driver need to save multiple editions of a source extent? It only returns the latest one on any ReadData call anyway.

Secondly, it would be useful to allow desk accessories to take advantage of IAC. And of course, you don’t need MultiFinder to run desk accessories. The check for the presence of MultiFinder is neat, but is it really necessay?

As always, keep up the good work, and let’s have even more thought provoking articles in MacTutor! [We’ll do our best. -ed]

[This letter gave me the excuse to call and talk to Frank Alviani. Frank, if you ever get the chance, is one of the nicest people to talk to, and I enjoyed the opportunity to call and see how things were going on his new house (not done as of this writing).

Frank explained to me that although the main purpose of the driver is to give the most recent extent to the clients, there are a couple reasons to keep the old extents. The first is to give the client the ability to call older extents. This could be used for perhaps a “hot” undo feature.

The second reason is useful for database type applications where each extent may want to be saved for future use. Lengthy file operations may bring the client back in time to find himself several extent versions behind the current version.

Your second question was a good one, also. Desk accessories have the ability of file I/O. Also the driver itself makes ordinary calls. Therefore it is conceivable that the driver could be modified to work with desk accessories. The call to initialize the driver could say basically, “I don’t care if MultiFinder is around.” - KC]

Animated Watch Cursor Typo

Andy O’Brien

Keep up the great work on a fine magazine. Even the letters contain little tidbits of information. I especially enjoyed David Stoops’ letter in the December ’88 issue. After keying it in (and getting the proper LSP error message). I Realized that the InitWatch procedure in the WatchUtilities unit had a typo in it. GetCursor was being called as a procedure when we all know it is a function. Here is what the procedure should look like. Take care and continued success

porcedure InitWatch;
 var
 watchcount : integer;
begin
 WatchList := acurHandle(GetResource(‘acur’, 0));
 with WatchList^^ do
 begin
 for watchcount := 1 to 8 do
 Watch[watchcount] := GetCursor(HiWord(longint(Watch[watchcount])));
 whichWatch := 0;
 end;
end;

Bookstore Blues?

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

GraphicConverter 10.4.3 - $39.95
GraphicConverter is an all-purpose image-editing program that can import 200 different graphic-based formats, edit the image, and export it to any of 80 available file formats. The high-end editing... Read more
Google Chrome 60.0.3112.78 - Modern and...
Google Chrome is a Web browser by Google, created to be a modern platform for Web pages and applications. It utilizes very fast loading of Web pages and has a V8 engine, which is a custom built... Read more
PDFpenPro 9.1 - Advanced PDF toolkit for...
PDFpenPro allows users to edit PDF's easily. Add text, images and signatures. Fill out PDF forms. Merge or split PDF documents. Reorder and delete pages. Create fillable forms and tables of content... Read more
PDFpen 9.1 - $74.95
PDFpen allows users to easily edit PDF's. Add text, images and signatures. Fill out PDF forms. Merge or split PDF documents. Reorder and delete pages. Even correct text and edit graphics! Features... Read more
DiskCatalogMaker 7.1.3 - Catalog your di...
DiskCatalogMaker is a simple disk management tool which catalogs disks. Simple, light-weight, and fast Finder-like intuitive look and feel Super-fast search algorithm Can compress catalog data for... Read more
Amadeus Pro 2.4 - Multitrack sound recor...
Amadeus Pro lets you use your Mac for any audio-related task, such as live audio recording, digitizing tapes and records, converting between a variety of sound formats, etc. Thanks to its outstanding... Read more
Little Snitch 4.0.1 - Alerts you about o...
Little Snitch gives you control over your private outgoing data. Track background activity As soon as your computer connects to the Internet, applications often have permission to send any... Read more
Sparkle Pro 2.2.1 - $79.99
Sparkle Pro will change your mind if you thought building websites wasn't for you. Sparkle is the intuitive site builder that lets you create sites for your online portfolio, team or band pages, or... Read more
iWatermark Pro 2.0.0fc4 - Easily add wat...
iWatermark Pro is the essential watermarking app for professional, business, and personal use. Easily secure and protect your photos with text, a graphic, a signature, or a QR watermark. Once added... Read more
Together 3.8.7 - Store and organize all...
Together helps you organize your Mac, giving you the ability to store, edit and preview your files in a single clean, uncluttered interface. Together Features Smart storage. With simple drag-and-... Read more

Latest Forum Discussions

See All

Mix and match magical brews in Miracle M...
Miracle Merchant, the charming fantasy card game by Tiny Touch Tales, is arriving next week. The development team, which also brought you Card Crawl and Card Thief, announced the game's launch with a pleasant little trailer that showcases the game'... | Read more »
Last Day on Earth: Zombie Survival guide...
Last Day on Earth: Zombie Survival is the latest big hit in the survival game craze. The gist of the game is pretty cut and dry -- try your best to survive in a world overrun by flesh-eating zombies. But Last Day on Earth justifies the hype... | Read more »
Eden: Renaissance (Games)
Eden: Renaissance 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Eden: Renaissance is a thrilling turn-based puzzle adventure set in a luxurious world, offering a deep and moving... | Read more »
Glyph Quest Chronicles guide - how to ma...
Glyph Quest returns with a new free-to-play game, Glyph Quest Chronicles. Chronicles offers up more of the light-hearted, good humored fantasy fun that previous games featured, but with a few more refined tricks up its sleeve. It's a clever mix of... | Read more »
Catch yourself a Lugia and Articuno in P...
Pokémon Go Fest may have been a bit of a disaster, with Niantic offering fans full refunds and $100 worth of in-game curency to apologize for the failed event, but that hasn't ruined trainers' chances of catching new legendary Pokémon. Lugia nad... | Read more »
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 »

Price Scanner via MacPrices.net

USB 3.0 Promoter Group Announces USB 3.2 Upda...
The USB 3.0 Promoter Group has announced the pending release of the USB 3.2 specification, an incremental update that defines multi-lane operation for new USB 3.2 hosts and devices. USB Developer... Read more
Save on MacBook Pros with Apple Refurbished 2...
Apple recently dropped prices on Certified Refurbished 2016 15″ and 13″ MacBook Pros with models now as much as $590 off original MSRP. An Apple one-year warranty is included with each model, and... Read more
13-inch 2.3GHz/256GB MacBook Pros on sale for...
B&H Photo has 13″ 2.3GHz/256GB MacBook Pros in stock today and on sale for $100 off MSRP including free shipping plus NY & NJ sales tax only: – 13-inch 2.3GHz/256GB Space Gray MacBook Pro (... Read more
Clearance 2016 13-inch MacBook Airs, Apple re...
Apple has Certified Refurbished 2016 13″ MacBook Airs available starting at $809. An Apple one-year warranty is included with each MacBook, and shipping is free: – 13″ 1.6GHz/8GB/128GB MacBook Air: $... Read more
PHOOZY World’s First Thermal Capsules to Summ...
Summer days spent soaking up the sun can be tough on smartphones, causing higher battery consumption and overheating. To solve this problem, eXclaim IP, LLC has introduced the PHOOZY Thermal Capsule... Read more
2018 Honda Ridgeline with Android Auto and Ap...
The 2018 Honda Ridgeline is arriving in dealerships nationwide with a Manufacturer’s Suggested Retail Price (MSRP1) starting at $29,630. The 2017 Honda Ridgeline was named North American Truck of the... Read more
comScore Ranks Top 15 U.S. Smartphone Apps fo...
comScore, Inc. recently released data from comScore Mobile Metrix, reporting the top smartphone apps in the U.S. by audience reach for June 2017. * “Apple Music,” as it appears in comScore’s monthly... Read more
13-inch 3.1GHz MacBook Pros on sale for $100...
B&H Photo has the new 2017 13″ 3.1GHz Space Gray MacBook Pros in stock today and on sale for $100 off MSRP including free shipping. B&H charges sales tax in NY and NJ only: – 13″ 3.1GHz/256GB... Read more
Apple refurbished Mac minis available startin...
Apple has Certified Refurbished Mac minis available starting at $419. Apple’s one-year warranty is included with each mini, and shipping is free: – 1.4GHz Mac mini: $419 $80 off MSRP – 2.6GHz Mac... Read more
Apple’s 2017 Back to School Promotion: Free B...
Purchase a new Mac using Apple’s Education discount, and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free. As part... Read more

Jobs Board

*Apple* Solutions Consultant (ASC) - Poole -...
Job Summary The people here at Apple don't just create products - they create the kind of wonder that's revolutionised entire industries. It's the diversity of those Read more
SW Engineer *Apple* TV - Apple Inc. (United...
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
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
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.