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

Check out the new Pirate Attack update i...
Love pirates and board games? Well, you'll love the new Pirate Attack themed update that just launched in Game of Dice. It adds a bunch of new content themed around pirates, like an all new event map based on a pirate ship which revamps the toll... | Read more »
Splash Cars guide - How to paint the tow...
Splash Cars is an arcade driving game that feels like a hybrid between Dawn of the Plow and Splatoon. In it, you'll need to drive a car around to repaint areas of a town that have lost all of their color. Check out these tips to help you perform... | Read more »
The best video player on mobile
We all know the stock video player on iOS is not particularly convenient, primarily because it asks us to hook a device up to iTunes to sync video in a world that has things like Netflix. [Read more] | Read more »
Four apps to help improve your Super Bow...
Super Bowl Sunday is upon us, and whether you’re a Panthers or a Broncos fan you’re no doubt gearing up for it. [Read more] | Read more »
LooperSonic (Music)
LooperSonic 1.0 Device: iOS Universal Category: Music Price: $4.99, Version: 1.0 (iTunes) Description: LooperSonic is a multi-track audio looper and recorder that will take your loops to the next level. Use it like a loop pedal to... | Read more »
Space Grunts guide - How to survive
Space Grunts is a fast-paced roguelike from popular iOS developer, Orange Pixel. While it taps into many of the typical roguelike sensibilities, you might still find yourself caught out by a few things. We delved further to find you some helpful... | Read more »
Dreii guide - How to play well with othe...
Dreii is a rather stylish and wonderful puzzle game that’s reminiscent of cooperative games like Journey. If that sounds immensely appealing, then you should immediately get cracking and give it a whirl. We can offer you some tips and tricks on... | Read more »
Kill the Plumber World guide - How to ou...
You already know how to hop around like Mario, but do you know how to defeat him? Those are your marching orders in Kill the Plumber, and it's not always as easy as it looks. Here are some tips to get you started. This is not a seasoned platform... | Read more »
Planar Conquest (Games)
Planar Conquest 1.0 Device: iOS Universal Category: Games Price: $12.99, Version: 1.0 (iTunes) Description: IMPORTANT: Planar Conquest is compatible only with iPad 3 & newer devices, iPhone 5 & newer. It’s NOT compatible with... | Read more »
We talk to Cheetah Mobile about its plan...
Piano Tiles 2 is a fast-paced rhythm action high score chaser out now on iOS and Android. You have to tap a series of black tiles that appear on the screen in time to the music, being careful not to accidentally hit anywhere else. Do that and it's... | Read more »

Price Scanner via MacPrices.net

BookBook For iPad Pro Coming Soon
The iPad Pro is a device unlike any other, and with Apple Pencil, it’s the ideal portable sketchpad: all that’s missing is the modern easel and portfolio to go. TwelveSouth’s BookBook for iPad Pro... Read more
12-inch 1.2GHz Silver Retina MacBook on sale...
B&H Photo has the 12″ 1.2GHz Silver Retina MacBook on sale for $1399 including free shipping plus NY sales tax only. Their price is $200 off MSRP, and it’s the lowest price for this model from... Read more
iPads on sale at Target: $100 off iPad Air 2,...
Target has WiFi iPad Air 2s and iPad mini 4s on sale for up to $100 off MSRP on their online store for a limited time. Choose free shipping or free local store pickup (if available). Sale prices for... Read more
Target offers Apple Watch for $100 off MSRP
Target has Apple Watches on sale for $100 for a limited time. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary: - Apple... Read more
Apple refurbished 2014 13-inch Retina MacBook...
Apple has Certified Refurbished 2014 13″ Retina MacBook Pros available for up to $400 off original MSRP, starting at $979. An Apple one-year warranty is included with each model, and shipping is free... Read more
Macs available for up to $300 off MSRP, $20 o...
Purchase a new Mac or iPad using Apple’s Education Store and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free, and... Read more
Watch Super Bowl 50 Live On Your iPad For Fre...
Watch Super Bowl 50 LIVE on the CBS Sports app for iPad and Apple TV. Get the app and then tune in Sunday, February 7, 2016 at 6:30 PM ET to catch every moment of the big game. The CBS Sports app is... Read more
Two-thirds Of All Smart Watches Shipped In 20...
Apple dominated the smart watch market in 2015, accounting for over 12 million units and two-thirds of all shipments according to Canalys market research analysts’ estimates. Samsung returned to... Read more
12-inch 1.2GHz Retina MacBooks on sale for up...
B&H Photo has 12″ 1.2GHz Retina MacBooks on sale for $180 off MSRP. Shipping is free, and B&H charges NY tax only: - 12″ 1.2GHz Gray Retina MacBook: $1499 $100 off MSRP - 12″ 1.2GHz Silver... Read more
12-inch 1.1GHz Gray Retina MacBook on sale fo...
B&H Photo has the 12″ 1.1GHz Gray Retina MacBook on sale for $1199 including free shipping plus NY sales tax only. Their price is $100 off MSRP, and it’s the lowest price available for this model... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
*Apple* Retail - Multiple Positions (US) - A...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Subject Matter Expert - Experis (Uni...
This position is for an Apple Subject Matter Expert to assist in developing the architecture, support and services for integration of Apple devices into the domain. Read more
*Apple* Macintosh OSX - Net2Source Inc. (Uni...
…: * Work Authorization : * Contact Number(Best time to reach you) : Skills : Apple Macintosh OSX Location : New York, New York. Duartion : 6+ Months The associate would Read more
Computer Operations Technician ll - *Apple*...
# Web Announcement** Apple Technical Liaison**The George Mason University, Information Technology Services (ITS), Technology Support Services, Desktop Support Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.