TweetFollow Us on Twitter

IAC Toolkit
Volume Number:7
Issue Number:5
Column TagTools of the Trade

IAC with UserLand's Toolkit

By Dave Kelly, MacTutor Editorial Staff

Perhaps you have heard about interapplication communication. First, look at the way most applications communicate. This investigation will turn out to be an analysis of the evolution of the Macintosh. Up to now communications between applications have been done by the “Export-Import” method. That is, data is exported from the first application to the clipboard or an external file and then pasted or imported into the second application. This method usually requires a user to “baby-sit” the operation. Cut and paste operations don’t make any assumptions about what application is doing the paste and passes on very little knowledge of where the data came from. At most, all that is known is the type of data that is being pasted (TEXT, PICT, etc.).

Of course, ingenious utilities such as QuicKeys and MacroMaker can “automate” some of these operations. These macro utilities have been a great help, but can’t possibly do everything. They extend applications to make them appear to have more features.

Applications running with MultiFinder have had a slight edge up to now when it comes to communicating with each other. A few companies have come up with their own system of communication between applications. For example, you can link data in MS Word to data in MS Excel and changes in the data are reflected in the linked application. There are other “integrated” software packages available. These “custom” applications are designed to work with each other. The problem is that they don’t work outside the set of integrated applications.

With MultiFinder the user can load two or more applications into memory at once, but the only thing that is stopping the applications from talking to one another is the lack of a little bit of software to hook them up. Have you ever written an application and wanted to add the text processing capabilities of MS Word, the communications capabilities of AppleLink and drawing tools of MacDraw II? Since it usually isn’t so smart to “reinvent the wheel”, wouldn’t it be good if you could link you favorite applications together to have the best of all worlds?

The idea of IAC is much more than integrating applications. IAC gives applications the power to ask other applications to perform tasks for them and then return the results. The user can combine the features of several different programs to create new functionality that would otherwise be unavailable. It may help to imagine that you are adding a scripting system to your application. Scripts sent to other applications could look in menus and dialog boxes and assume full control over another application. The difficulty is that IAC must be implemented in the client and server applications before any intercommunication can take place.

Until now the only form of IAC was in custom programs that only talked to each other. System 7.0 defines a common method for applications to communicate. Apple calls it AppleEvents. AppleEvents are only available under system 7.0, which brings up a complication for developers that want their applications to support both System 6.0 and 7.0. There are still many 1 Meg Macintosh systems in use that will still be running 6.0 systems for some time to come.

In January (1991) a new software company called UserLand Software, Inc. released new software support for IAC. The company has been quiet until last November when they disclosed their development of the UserLand IAC Toolkit that first shipped on December 31st. There are several advantages with working with UserLand IAC Toolkit. In particular your application can communicate using System 6.0 or System 7.0 and possibly future operating systems in the future. There are implications that IAC will be available for MS-DOS, Windows, or Unix. The IAC Toolkit was designed so that your application can be driven by a user scripting system. The main advantage is that the toolkit provides an IAC environment that is not biased toward any one platform, yet provides one that will be supported on major platforms like System 7.0.

The Toolkit is simpler to use than AppleEvents (System 7.0). The manual is an indication of this simplicity. The introduction gives a thorough overview of IAC and some real examples of how it could be used. The step by step installation tells what files will be used for using the Toolkit with THINK C version 4.0 or MPW C 3.1 or later. When using system 6.0 the UserLand INIT is required to be installed in your system folder. Next, four sample programs are provided with source code so you can see how it’s done. Implementation of the Toolkit with your projects is presented in a detailed format that shows how to add IAC capability to your applications. The last half of the 71 page manual is a complete reference of the UserLand IAC Toolkit library. If you become familiar with the manual, you should have no problem implementing UserLand IAC. The IAC toolkit adds about 12K to the size of you program. That’s not counting the UserLand INIT that takes about 6K.

Before you get started writing your IAC applications, you should be aware of some costs of IAC. Implementation of UserLand IAC comes at the reasonable price of $395 (retail price, street prices are possibly lower). Distributing IAC using UserLand IAC Toolkit will require that you get a distribution license from UserLand Software before shipping. The cost is $4000 for a fully-paid, royalty-free license to include the Toolkit with as many of your company’s applications as you like. If that doesn’t sound bad enough, they put a 5 year term on the license so that in 1995 you’ll have to renew the license or a new one for a more powerful product that 1995 may produce. When you purchase the distribution license, UserLand will deliver the complete C source code so you can support IAC better especially as Apple introduces new hardware and system software.

The license fee sounds excessive, but in the price UserLand has taken into account their development expenses, developer needs, and future development of cross-platform and network-aware versions In addition, they provide excellent product support by getting involved with IAC developers without an additional charge for support. You’ll need to evaluate the pros and cons vs. cost to decide if the toolkit is the way for you to go. Keep in mind that there will be a bit more of a learning curve to implement AppleEvent IAC for system 7.0. than to implement UserLand IAC. If you’re a small developer and feel that the license is too excessive, you may want to negotiate a “technology exchange” with UserLand, if you have any technology to exchange.

In contrast, other “toolkits” have a much less costly license agreement. Many products such as the Programmer’s Extender and the Extender DialogHandler from Invention Software allow you to distribute freely and/or market programs that use their toolbox if no portions of the source code library, user manuals or other documentation is distributed. UserLand should review their license policy to encourage more small developers to want to use it. I might suggest a license with limited support or without the source code for small developers. It’s too bad, but UserLand’s license was designed for larger commercial and in-house developers. The small struggling developers just have to pay the price like everybody else. Remember, you can still work with the toolkit for the $395 price and don’t have to license your product until it ships. If your product is worth it’s weight, you should be able to come up with the license fee. Dave Winer, President of UserLand puts it this way: “We’ve put a lot of thought into the pricing of this product. If it’s out of reach for some developers, and they don’t have any technology they want to exchange, so be it. We hope at least those developers will consider putting System 7.0 AppleEvents into their products. We believe IAC is worth doing even if it’s only for System 7.0, and even if the developer has to do more work than absolutely necessary. On the other hand, we think that any developer who passes on UserLand IAC Toolkit is being penny-wise and pound-foolish, and missing a great opportunity to make their software more useful and more competitive.”

In summary, the UserLand IAC Toolkit provides support for IAC in System 6.0 not available elsewhere. It has been designed to support multi-platforms including System 7.0. You need the toolkit if you want IAC support in both System 6.0 and 7.0. Although the Userland toolkit is easier to use, the cost to license it for distribution may be a trade off for the time it takes to develop a similar IAC application using System 7.0 AppleEvents. You’ll have to be the judge of that. The toolkit doesn’t support other languages except C at this time.

Userland Software, Inc.

490 California Avenue

Palo Alto, CA. 94306

Phone: 415 325-5700

FAX 415-325-9829

AppleLink USERLAND.DTS

Price: $395 + $4000 license fee (5 year term) to distribute applications that use the Userland IAC Toolkit.

Requires: THINK C version 4.0 or later or MPW C 3.1 or later; a Macintosh computer with at least 2MB RAM, running MultiFinder, System 6.X or System 7.X; a hard disk.

OTHER STUFF

calenDAr™ from Psybron Systems is not just a calendar DA, but is a calendar with fully programmable alarms. If you didn’t think LifeGuard would provide enough for you (March 1991 MacTutor, p.79), calenDAr may provide similar reminders for you. It doesn’t count keystrokes for you, but you can have calenDAr remind you with either a sound and/or a message dialog on periodic intervals or on a one time basis. It’s set up to record new sounds or audio messages for you with MacRecorder or the built in sound support of the Macintosh LC or SI.

The calendar correctly displays calendars for months between January 1583 (the first month of the first full year in which the Gregorian calendar was used) through December 99,999. All major US, Canadian and Jewish holidays are displayed for every year as well as other special dates such as beginning of spring, summer, fall, and winter.

Psybron Systems says that calculating the dates of holidays like Hanukkah and Easter aren’t as easy as it might seem, but calenDAr does an excellent job of it. It’s a spiffy little DA that you might find useful.

Psybron Systems, Inc.

1116 Smith Street Suite 206

Post Office Box 431

Charleston, WV. 25322-0431

(304) 340-4260 or (800) 866-4260

FAX: (304) 345-3312

Price: $49.95 plus shipping.

Update on bugs that were reported in the Programmer’s Assistants from Aladdin Systems: The Bystander bug has been corrected. It was a memory management problem. All of the DAs are being updated to support System 7.0.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Parallels Desktop 12.0.0 - Run Windows a...
Parallels allows you to run Windows and Mac applications side by side. Choose your view to make Windows invisible while still using its applications, or keep the familiar Windows background and... Read more
Firefox 48.0.2 - Fast, safe Web browser.
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
Apple iOS 9.3.5 - The latest version of...
iOS is the world’s most advanced mobile operating system, and it’s the foundation of iPhone, iPad, and iPod touch. It comes with a collection of apps and features that let you do the everyday things... Read more
Spotify 1.0.36.124. - 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
Apple iOS 9.3.5 - The latest version of...
iOS is the world’s most advanced mobile operating system, and it’s the foundation of iPhone, iPad, and iPod touch. It comes with a collection of apps and features that let you do the everyday things... Read more
Parallels Desktop 12.0.0 - Run Windows a...
Parallels allows you to run Windows and Mac applications side by side. Choose your view to make Windows invisible while still using its applications, or keep the familiar Windows background and... Read more
Spotify 1.0.36.124. - 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
Firefox 48.0.2 - Fast, safe Web browser.
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
BBEdit 11.6.1 - Powerful text and HTML e...
BBEdit is the leading professional HTML and text editor for the Mac. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a... Read more
OmniGraffle Pro 6.6.1 - Create diagrams,...
OmniGraffle Pro helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use... Read more

Cartoon Network Superstar Soccer: Goal!!...
Cartoon Network Superstar Soccer: Goal!!! – Multiplayer Sports Game Starring Your Favorite Characters 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Become a soccer superstar with your... | Read more »
NFL Huddle: What's new in Topps NFL...
Can you smell that? It's the scent of pigskin in the air, which either means that cliches be damned, pigs are flying in your neck of the woods, or the new NFL season is right around the corner. [Read more] | Read more »
FarmVille: Tropic Escape tips, tricks, a...
Maybe farming is passé in mobile games now. Ah, but farming -- and doing a lot of a other things too -- in an island paradise might be a little different. At least you can work on your tan and sip some pina coladas while tending to your crops. [... | Read more »
Become the King of Avalon in FunPlus’ la...
King Arthur is dead. Considering the legend dates back to the 5th century, it would be surprising if he wasn’t. But in the context of real-time MMO game King of Avalon: Dragon Warfare, Arthur’s death plunges the kingdom into chaos. Evil sorceress... | Read more »
Nightgate (Games)
Nightgate 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: *** Launch Sale: 25% OFF for a limited time! *** In the year 2398, after a great war, a network of intelligent computers known as... | Read more »
3 best fantasy football apps to get you...
Last season didn't go the way you wanted it to in fantasy football. You were super happy following your drafts or auctions, convinced you had outsmarted everyone. You were all set to hustle on the waiver wire, work out some sweet trades, and make... | Read more »
Pokemon GO update: Take me to your leade...
The Team Leaders in Pokemon GO have had it pretty easy up until now. They show up when players reach level 5, make their cases for joining their respective teams, and that's pretty much it. Light work, as Floyd Mayweather might say. [Read more] | Read more »
Ruismaker FM (Music)
Ruismaker FM 1.0 Device: iOS Universal Category: Music Price: $4.99, Version: 1.0 (iTunes) Description: Following up on the success of Ruismaker, here's her crazy twin-sister, designed for people who want to design their own... | Read more »
Space Marshals 2 (Games)
Space Marshals 2 1.0.15 Device: iOS iPhone Category: Games Price: $5.99, Version: 1.0.15 (iTunes) Description: The sci-fi wild west adventure in outer space continues with Space Marshals 2. This tactical top-down shooter puts you in... | Read more »
Dungeon Warfare (Games)
Dungeon Warfare 1.0 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: Dungeon Warfare is a challenging tower defense game where you become a dungeon lord to defend your dungeon against greedy... | Read more »

Price Scanner via MacPrices.net

BookBook Releases SurfacePad, BookBook &...
BookBook has released three new covers just for iPad Pro: SurfacePad, BookBook and BookBook Rutledge Edition. BookBook for iPad Pro is a gorgeous leather case reminiscent of a vintage sketchbook.... Read more
Clean Text 1.0 for iOS Reduces Text Cleanup a...
Apimac today announced availability of Clean Text for iOS, a tool for webmasters, graphic designers, developers and magazine editors to reduce text cleanup and editing time, and also for any iPhone... Read more
27-inch iMacs on sale for up to $220 off MSRP
B&H Photo has 27″ Apple iMacs on sale for up to $200 off MSRP including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2099 $200 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $1899 $100... Read more
Apple refurbished 13-inch MacBook Airs availa...
Apple has Certified Refurbished 2016 and 2015 13″ MacBook Airs now available starting at $849. An Apple one-year warranty is included with each MacBook, and shipping is free: - 2016 13″ 1.6GHz/8GB/... Read more
Apple refurbished iPad mini 2s available for...
Apple is offering Certified Refurbished iPad mini 2s for up to $80 off the cost of new minis. An Apple one-year warranty is included with each model, and shipping is free: - 16GB iPad mini 2 WiFi: $... Read more
Save up to $600 with Apple refurbished Mac Pr...
Apple has Certified Refurbished Mac Pros available for up to $600 off the cost of new models. An Apple one-year warranty is included with each Mac Pro, and shipping is free. The following... Read more
Mac Pros on sale for $200 off MSRP
B&H Photo has Mac Pros on sale for $200 off MSRP. Shipping is free, and B&H charges sales tax in NY only: - 3.7GHz 4-core Mac Pro: $2799, $200 off MSRP - 3.5GHz 6-core Mac Pro: $3799, $200... Read more
Will We See A 10.5″ iPad Pro in 2017? – The ‘...
A MacRumors report, cites a research note from KGI Securities analyst Ming-Chi Kuo, saying a new size iPad model is in the works. According to the highly respected Cho, who has a strong track record... Read more
IOGEAR USB-C Docking Station Transforms Lapto...
IOGEAR has announced the launch of its innovative USB-C Docking Station with Power Delivery which turns USB-C enabled laptops into desktop workstations. The new IOGEAR USB-C Docking Station features... Read more
12-inch Retina MacBooks on sale for up to $10...
Amazon has 2016 12″ Apple Retina MacBooks on sale for $100 off MSRP. Shipping is free: - 12″ 1.1GHz Space Gray Retina MacBook: $1199 $100 off MSRP - 12″ 1.1GHz Silver Retina MacBook: $1224.99 $75 off... Read more

Jobs Board

*Apple* Engineer - Softthink Solutions, Inc....
Job Description:- Proven experience in administering IOS and OSX Apple devices in enterprises - Experience in administering Apple devices in Windows environments Read more
*Apple* Professional Learning Specialist - A...
# Apple Professional Learning Specialist Job Number: 51234243 Portland, Maine, Maine, United States Posted: Aug. 18, 2016 Weekly Hours: 40.00 **Job Summary** The Read more
*Apple* Mobile Master - Best Buy (United Sta...
What does a Best Buy Apple Mobile Master do? At Best Buy, our mission is to leverage the unique talents and passions of our employees to inspire, delight, and enrich Read more
*Apple* Retail - Multiple Positions Akron, O...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Simply Mac *Apple* Specialist- Repair Techn...
…The Technician is a master at working with our customers to diagnose and repair Apple devices in a manner that exceeds the expectations set forth by Apple Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.