TweetFollow Us on Twitter

Sep 96 Dialog Box
Volume Number:12
Issue Number:9
Column Tag:Dialogue Box

Dialog Box

By Matt Neuburg, letters@mactech.com

Hello Java, Good-bye OLE and OpenDoc

Sometimes, when we are lucky, reality sneaks up and screams “Hello!” when we most need it.

Thinking about how to write extensible applications in Java, I was listing requirements, procedures, and issues for communication and control between the main application and the extensions. What is the minimum core of OLE and OpenDoc? Does it really have to be as complicated as OpenDoc?

Then reality suddenly screamed, “Hello! Isn’t a Java-enabled browser one of the most extensible applications we have ever seen? How is that done?”

A browser can load and run essentially “anonymous” applets, of any complexity, that can do just about anything - even bring up windows and work with files (when permitted). What more could we want?

Well, for extensible applications in general, we could want custom menus, closer integration into the application, and more access to the application’s data. As it happens, all this is possible - right now - with Java; the implementation of a browser shows us how.

We extend the Applet class to make our own applets. The Applet class establishes a few “entry points” (methods) through which a browser can tell the applet to initialize itself, run, update, and so on. The applet can do whatever else you want in addition to these few responsibilities.

For its part, the browser must implement the AppletContext interface, which dictates the services the browser must provide to any applet. If both sides fulfill these contracts, the browser can use Java’s ClassLoader to load an applet from a local or remote file, place it into the browser’s own window, and run it.

To implement our own extensible applications, we don’t have to use applets (although we certainly can); we just need to set up the kind of contracts established by the Applet class and the AppletContext interface. Perhaps we will include ways to share menus and application data; the particular methods are our call (so to speak).

Now think of the silliness of first implementing a Java-enabled OpenDoc part, then rewriting applications to accept OpenDoc parts! Or just rewriting for OpenDoc in general. Why not rewrite the applications in Java, and get straight to the point?

“Hello!” Which is the actually existing revolution - Java, or OLE/OpenDoc?

It’s time to tell OLE and OpenDoc (and VBXs, OCXs, XFCNs, MOBJs, XTNDs, and so on) “Good-bye!”

“Uncle Dave” Moffat

Mac Web Tools Redux

In the May 1996 Dialogue Box, Ziya Oz writes:

“At the last Macworld Expo in Boston, I asked myself: If Ceneca was not formed by ex-Taligent people, would they have developed Page/SiteMill for the Mac OS first? Would they even have developed for the Mac at all? My answers are: No and No again.”

His conclusions are erroneous. Ceneca initially planned to write PageMill for Windows. However, when they spoke to Web authors at several companies, they found out that Macintosh was the dominant platform for creating Web content. Ceneca therefore changed their strategy and developed a Mac version instead. (I learned this from Robert Seidl of Ceneca/Adobe at the WWDC.)

The majority of Web content is created on Macs. Macintosh is also the second most popular Web server, after UNIX. A developer writing content tools would be wise to publish a Mac version of his product.

Terry Morse

Language Wars Redux

Many Mac OS programmers still code in Pascal - and that’s OK. But they (and MacTech Magazine, too) should give another language a try. No, I’m not talking about C++ or Java; I’m talking about Oberon-2 (Pascal’s grandchild, so to speak). Interested? Then read on.

MacOberon, Oberon System 3, and Oberon/F generate 68K code. PowerOberon generates PowerPC code, but has no linker yet. Or you can use MPW. The URLs are:

ftp://ftp.inf.ethz.ch/pub/Oberon/

ftp://oberon.ssw.uni-linz.ac.at/pub/Oberon/PowerMac/

http://frodo.informatik.uni-ulm.de/projekte/MPWOberon/

As a CodeWarrior, I hope that Metrowerks will integrate this fantastic language into their IDE. But, till then, I’m perfectly happy with C++ and PowerPlant.

By the way, to “serious” Oberon users I recommend Programming in Oberon and Object-oriented Programming in Oberon-2 (both from Addison-Wesley).

Paul E. Sevinc

[Our paucity of articles written in Oberon is not due to any want of trying. In fact, we have a review of Oberon/F in the works; watch for it in a future issue. As always, the best way to ensure coverage of your favorite area of expertise is to participate by writing us an article yourself - man]

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Victorious Knight (Games)
Victorious Knight 1.3 Device: iOS Universal Category: Games Price: $1.99, Version: 1.3 (iTunes) Description: New challenges awaits you! Experience fresh RPG experience with a unique combat mechanic, packed with high quality 3D... | Read more »
Agent Gumball - Roguelike Spy Game (Gam...
Agent Gumball - Roguelike Spy Game 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Someone’s been spying on Gumball. What the what?! Two can play at that game! GO UNDERCOVERSneak past enemy... | Read more »
Runaway Toad (Games)
Runaway Toad 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: It ain’t easy bein’ green! Tap, hold, and swipe to help Toad hop to safety in this gorgeous new action game from the creators of... | Read more »
PsyCard (Games)
PsyCard 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: From the makers och Card City Nights, Progress To 100 and Ittle Dew PSYCARD is a minesweeper-like game set in a cozy cyberpunk... | Read more »
Sago Mini Robot Party (Education)
Sago Mini Robot Party 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: -- Children's Technology Review Editor's Choice -- | Read more »
How to get a high score in every level o...
Sky Charms is an adorable match three puzzler that provides a decent challenge thanks to its creative level design. It regularly presents something new, forcing you to think on your feet. [Read more] | Read more »
Apestorm: Full Bananas (Games)
Apestorm: Full Bananas 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: ***Launch sale – limited time only!*** Fugitive Apes have taken to the skies in search of revenge after humans have... | Read more »
How to create bigger words in Spellspire
Words have power. At least they do in Spellspire,a game about blasting out magical attacks by making words out of a jumble of letters. And it's a lot of fun. But if you want to be the best, you're going to have to think tactically when you start... | Read more »
Steel Media and DeePoon have partnered f...
Virtual reality is the next big thing, and 148Apps's publisher,Steel Media, wants to know what the hottest upcoming games are. [Read more] | Read more »
Airline Director 2 - Tycoon Game (Games...
Airline Director 2 - Tycoon Game 1.2.1 Device: iOS Universal Category: Games Price: $2.99, Version: 1.2.1 (iTunes) Description: Airline Director 2 is a management game set in the challenging field of commercial aviation. As the... | Read more »

Price Scanner via MacPrices.net

Aleratec Releases Mac Software Upgrade for 1...
California based Aleratec Inc., designer, developer and manufacturer of Portable Device Management (PDM) charge/sync products for mobile devices and professional-grade duplicators for hard disk... Read more
Sale! Amazon offers 27-inch iMac, 13-inch 2.9...
Amazon has the 27″ 3.2GHz 5K iMac and the 13″ 3.9GHz Retina MacBook Pro on sale for $300 off MSRP, each including free shipping, for a limited time: - 27″ 3.2GHz/1TB HD 5K iMac (model MK462LL/A): $... Read more
Apple refurbished 13-inch Retina MacBook Pros...
Apple has Certified Refurbished 13″ Retina MacBook Pros available for up to $270 off the cost of new models. An Apple one-year warranty is included with each model, and shipping is free: - 13″ 2.7GHz... Read more
13-inch 2.7GHz/128GB Retina MacBook Pro on sa...
Take $200 off MSRP on the price of a new 13″ 2.7GHz/128GB Retina MacBook Pro (model MF839LL/A) at Amazon. Shipping is free: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1099.99 $200 off MSRP Act now if... Read more
Apple refurbished clearance 15-inch Retina Ma...
Apple has Certified Refurbished 2014 15″ 2.2GHz Retina MacBook Pros available for $1609, $390 off original MSRP. Apple’s one-year warranty is included, and shipping is free. They have refurbished 15... Read more
27-inch 5K iMacs on sale for up to $150 off M...
B&H Photo has 27″ 5K iMacs on sale for up to $150 off MSRP including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2199 $100 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $1849.99 $150... Read more
What Does The Refreshed 12-Inch MacBook Tell...
A lot of commentators are complaining that Apple’s update of the 12-Inch MacBook last week is a bit of a damp squib. I don’t know what they were expecting, since it would be very unlike Apple to do a... Read more
Free Wittify Keyboard Now Available On The Ap...
A team of Harvard Business School students have announced that the Wittify Keyboard, a new app utility for iOS devices, is now available on the Apple App Store. The Wittify keyboard and application... Read more
Apple Reports First Year-Over-Year Quarterly...
Apple on TUesday announced financial results for its fiscal 2016 second quarter ending March 26, 2016. The Company posted quarterly revenue of $50.6 billion and quarterly net income of $10.5 billion... Read more
13-inch 2.7GHz Retina MacBook Pros on sale fo...
Take $130-$150 off MSRP on the price of a new 13″ 2.7GHz Retina MacBook Pro at Amazon. Shipping is free: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1169 $130 off MSRP - 13″ 2.7GHz/256GB Retina MacBook... Read more

Jobs Board

Simply Mac *Apple* Specialist- Service Repa...
Simply Mac is the largest premier retailer of Apple products in the nation. In order to support our growing customer base, we are currently looking for a driven Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
*Apple* Solutions Consultant - … (United Sta...
Job Summary As an Apple Solutions Consultant, you'll be the link between our future customers and our products. You'll showcase your entrepreneurial spirit as you Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.