TweetFollow Us on Twitter

Nov 96 Factory Floor
Volume Number:12
Issue Number:11
Column Tag:From The Factory Floor

A Brand New Constructor

By Dave Mark, Metrowerks

This month’s Factory Floor interview is with Eric Scouten, Robin Mair, and Clint Popetz, three members of Metrowerks’ Constructor team. In case you’ve never used it before, Constructor is the visual front end that makes it easy to design interfaces for your Macintosh and Java applications and applets. With the release of CodeWarrior 10 in September, Constructor sports a new look and offers some new functionality. Read on to find out more.

Dave: How would you compare the old (CW8) and new (CW10) versions of Constructor?

Eric: There are now two Constructors: one for PowerPlant (MacOS) and one for Java. The Java Constructor debuted on CW10 and brings the same interface-building capabilities to the Java language framework (AWT) that we’ve been providing for our C++ framework for two years now.

In the PowerPlant Constructor, we’ve added several new resource editors since CW8. In CW9, we added the ability to edit menu bars. It’s pretty slick. The menu bar editor relies heavily on the Mac’s drag-and-drop interface. You can drag menu items around from one menu to another in a single mouse action. In CW10, we added support for many of the bitmap resource formats that people use in MacOS applications. You can edit icon suites, PICT resources, pattern resources, and more.

The other changes you’ll notice are not features, per se, but improvements in the user experience. In CW9, we began adopting the Apple Grayscale Appearance; this look is now almost complete in CW10, and is also visible in other parts of the CW product line (especially the IDE). Also, the CW8 Constructor had a lot of problems with stability. We’ve tightened up the code quality significantly since then.

Dave: Why are there two separate Constructors for Java (the AWT) and MacOS (for PowerPlant)?

Eric: There were two things that motivated this decision: code stability and code size. Constructor for Java contains a lot of new technology, such as an embedded copy of the Java virtual machine. This introduces some additional system requirements (such as the Code Fragment Manager for 68K) and adds quite a bit to the size of the final application. The Java runtime overhead is unnecessary in the Constructor for MacOS.

I also wanted to make sure that the development of Constructor for Java did not, in any way, disrupt the stability of the PowerPlant Constructor. Since the Java version was finalized fairly late in the CW10 release cycle, this was a significant concern.

In the future, both versions will be built from the same source files and will share about 80% common code. However, I expect that they will always remain separate. The project models are different, and the products will be growing in different directions.

Clint: As Eric said, embedding the Java runtime in Constructor creates a noticeable increase in memory footprint and binary size. We didn’t want to foist this on unsuspecting Constructor users. In addition, we felt that the intersection of Java programmers and PowerPlant programmers is pretty small at this point, so keeping the products separate seemed like a good move.

Dave: What is the Code Generation model for Java Constructor?

Eric: It’s pretty transparent, really. When you save a Constructor file, a Java source file is generated at the same time. It contains all the necessary code to rebuild the interface that you’ve described in the visual editor.

Clint: The code generation mechanism (which was written completely in Java) is meant to duplicate as closely as possible the UReanimator functionality in PowerPlant. So, the generated code consists of a series of classes, one for each component in the hierarchy, which know how to reanimate the target component. This source is not meant to be modified, since it is not the actual component subclass source. The developer can create their own Component subclasses in separate files, and then invoke the Reanimator methods to build the interface at runtime. Code to do this might look like:

MyFrame theFrame = (MyFrame)Reanimator.Reanimate(“MyFrame”,”theFrameName”);

In addition, the developer may wish to grab references to components in the newly created hierarchy. This functionality, which PowerPlant users will recognize as similar to the FindPaneByID functionality, is also provided by the Reanimator. Sample code to locate a TextArea in theFrame might look like:

TextArea theArea = (TextArea)Reanimator.Locate(“TextArea”,”theArea”,theFrame);

Dave: Over time, more and more resource editing appears to be moving into Constructor. Will Constructor eventually be able to take advantage of TMPLs? How much resource editing do you see moving into Constructor?

Eric: Right. Constructor began its life as a special-purpose resource editor, which knew about only the PowerPlant-specific resources (PPob and Txtr). We’ve gradually been adding more generic resource editing capabilities to it: menus, icons, etc.

These features are part of a long-term plan to evolve Constructor into a general-purpose resource editor and application builder. Editing resources described by TMPLs is an essential part of this plan, and it should be supported fairly soon (in either CW11 or CW12). We are also designing a plug-in API for resource editors, so you can write your own editors for custom resource types.

Dave: What Apple events does Constructor support now (in CW10)? What about new Apple events for future releases?

Eric: Apple event support in Constructor is pretty minimal. We’ve found that users view Constructor as an interactive program, and don’t typically want to script the process of designing a visual interface.

In the future, Constructor may have some Apple event interactions with the CodeWarrior IDE, to support building and running applications directly from Constructor.

Dave: Constructor allows you to design a CPPb resource that describes a “custom display class”, that is, a class derived from an existing PowerPlant display class. How does this mechanism work?

Eric: The properties (location, size, color, etc.) for each pane or view in a layout are stored in a bytestream. Constructor has built-in knowledge about all of the classes that are part of the PowerPlant framework itself.

Invariably, developers need to create their own subclasses of the PowerPlant building blocks to display the content that is specific to their application. (An example might be to create a subclass of LTableView that displays the list of message titles, senders, etc. in an e-mail application.)

The custom display class mechanism allows you to use Constructor to describe these specialized classes. If the class requires extra data to be in the bytestream, you create a CPPb resource to tell Constructor what these properties are. These properties then appear in the property inspector alongside the properties for the built-in class that you’ve derived from.

Custom display classes are due for a major overhaul in the next release of Constructor. We’ll be making the process quite a lot easier and less error-prone.

Dave: Products such as WebBurst allow you to build a complete applet or application using Constructor-like techniques, while Constructor has focused more on the specification of the user interface. Will Constructor be moving more into the application building model?

Robin: Constructor really started as a tool that provided easier access to the capabilities of PowerPlant and its pane/view mechanism, allowing graphical manipulation of the pane hierarchies. It is certainly our intent to move Constructor forward into the application building realm in an effort to make it easier for our customers to build applications. We will start moving in this direction by allowing the user to handle many of the more mundane aspects of application building directly from within Constructor. This would include providing tools for editing the standard resources such as, ‘BNDL’, ‘FREF’, etc. The inclusion of the new icon editor will also facilitate this by allowing the icons for the application to be created within Constructor. We don’t necessarily want to become the next ResEdit, but we want to enable our users to edit the resources commonly associated with building an application on the Mac.

In addition, we want to be able to provide a tighter integration between Constructor and the IDE in order to facilitate building an application without having to continually switch back and forth between the two environments. One of our goals in this direction is to allow the user to build the UI for their application, and get it up and running without having too write any code, so that they can quickly get something working.

Dave: WebBurst allows you to add graphic prettiness and animation to your applets in a way not currently supported by Constructor. Will Constructor be moving in this direction?

Robin: Many of these capabilities can be delivered by providing a richer set of objects that can be manipulated within Constructor. It is certainly one of our goals to provide a much richer set of objects that can be utilized in the construction of an application’s UI. Up until now we have been focusing on getting the core set of functionality in place. Once that task has been accomplished, we can start to provide richer capabilities that are not in the current versions of Constructor or PowerPlant.

We also are looking into mechanisms that will allow the user to introduce their custom classes into Constructor so that they have the ability to extend the set of capabilities that are available to them. CPPb’s currently allow you to do this but you cannot see how your classes would render, so the goal is provide a mechanism that would allow the drawing code from your classes to be available when your classes are included in a layout, thus allowing the visual manipulation to take on a more realistic representation than what is currently available in Constructor.

This mechanism could also potentially allow third party developers to create class libraries that could be used from within Constructor.

Dave: Does this mean that I’ll be able to import my own code into Constructor?

Robin: This has always been one of the thorny issues with Constructor, and any interface builder written with C++, for that matter.

Up until now we have had the CPPb mechanism which at least allows the user to setup the values they care about for their custom classes and to manipulate their layout, but the manipulation process has been a little unsatisfactory because their classes have only been represented in a layout as a rectangular box, which doesn’t exactly give you a feel for the appearance of the interface under construction.

The problem has been that with C++ there really is no clean way to get the users code included into Constructor, particularly the rendering aspects of the code, which is what you care about during the layout process.

In order to address this, Eric is working on a mechanism that would allow the users custom classes to handle the rendering of these classes within a layout, thereby making the layout process more visual than is currently available. We hope to make this available in a future version of Constructor in order to improve the layout process for custom classes.

As part of this effort we would also like to improve the CPPb mechanism so that it has greater flexibility, particularly in terms of the types that are available for constructing CPPbs.

Dave: What kind of changes do you see in future versions of Constructor?

Robin: Well as we’ve already mentioned, you can expect to see Constructor move more towards the application building realm, by allowing the user to perform many of the operations required to build an application directly from within Constructor. It is also our intent to establish a tighter integration with the IDE so that tasks, such as running or building the application, can be initiated from within Constructor.

We will also continue to develop the feature set of Constructor in order to deliver more power and flexibility to the application development process.

For example, we are planning on enhancing Constructor’s abilities to manage the various assets that come into play in the application building process. This basically can be viewed as a cataloging process that will provide the user with a centralized location for storing, browsing, and retrieving the various elements that are used to build both the UI for the application, as well as the application itself. This cataloging mechanism would be flexible enough to allow the user to drag elements from a catalog into a layout, or conversely to be able to drag a collection of elements from a layout back into the catalog for future reuse. The contents of the catalog would not be restricted to simple widgets, but would include all of the pieces needed in the construction process.

Another area we intend to improve is the inspection and editing of object properties, some of which you can get an early glimpse of by looking at the Java version of Constructor. This mechanism will be used in the PowerPlant version as well, and will be enhanced to provide a richer set of property editing capabilities.

As shown in the latest version of Constructor, with the inclusion of the icon editor, we want to continue delivering more of the resource editing capabilities that are needed in order to successfully construct an application.

We are definitely not standing still on Constructor. It is our goal to continue moving the tool forward in an effort to make it more powerful, flexible, and extensible. We also want to make it more accessible to novice users by continuing to improve its interface and the set of capabilities it delivers.

Clint: Since we are using live Java objects for displaying the interface, we plan to allow installation of user classes in Constructor, so that one could build interfaces with live instances of their classes. Along with this, we would like to provide a mechanism for added data in Constructor which could be streamed into user classes at runtime, similar to custom types in the PowerPlant Constructor.

Eric: The major directions for Constructor in the future are to take more of the gruntwork out of PowerPlant programming and to extend the resource-editing capabilities of the tool.

In the end, this is a tool to help users write great applications. Many of the features that you’ve seen implemented or planned are the direct result of user suggestions or comments. I invite people to contact me directly by e-mail (scouten@metrowerks.com) if they have new ideas that they’d like to see in future Constructors.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

BetterTouchTool 2.305 - Customize multi-...
BetterTouchTool adds many new, fully customizable gestures to the Magic Mouse, Multi-Touch MacBook trackpad, and Magic Trackpad. These gestures are customizable: Magic Mouse: Pinch in / out (zoom... Read more
calibre 3.8.0 - 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
Carbon Copy Cloner 5.0.2 - Easy-to-use b...
Carbon Copy Cloner backups are better than ordinary backups. Suppose the unthinkable happens while you're under deadline to finish a project: your Mac is unresponsive and all you hear is an ominous,... Read more
Evernote 6.12.3 - Create searchable note...
Evernote allows you to easily capture information in any environment using whatever device or platform you find most convenient, and makes this information accessible and searchable at anytime, from... Read more
Default Folder X 5.1.6 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Geekbench 4.1.2 - Measure processor and...
Geekbench provides a comprehensive set of benchmarks engineered to quickly and accurately measure processor and memory performance. Designed to make benchmarks easy to run and easy to understand,... Read more
GraphicConverter 10.5 - $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
Dropbox 35.4.20 - Cloud backup and synch...
Dropbox is an application that creates a special Finder folder that automatically syncs online and between your computers. It allows you to both backup files and keep them up-to-date between systems... Read more
XMind 8 Update 4 - Popular mind mapping...
XMind is the most popular mind mapping tool. Millions of people use XMind to clarify thinking, manage complex information, run brainstorming and get work organized. It couldn't be easier to get... Read more
Safari Technology Preview 11.1 - The new...
Safari Technology Preview contains the most recent additions and improvements to WebKit and the latest advances in Safari web technologies. And once installed, you will receive notifications of... Read more

The best new games we played this week -...
It's pretty much been one big release after another. We were privy to a bunch of surprises this week, with a lot of games we'd been waiting for quite some time dropping unexpectedly. We hope you're free this weekend, because there is a lot for... | Read more »
Stormbound: Kingdom Wars guide - how to...
Stormbound: Kingdom Wars is an excellent new RTS turned card battler out now on iOS and Android. Lovers of strategy will get a lot of enjoyment out of Stormbound's chess-like mechanics, and it's cardbased units are perfect for anyone who loves the... | Read more »
The best AR apps and games on iOS right...
iOS 11 has officially launched, and with it comes Apple's ARKit, a helpful framework that makes it easier than ever for developers to create mobile AR experiences. To celebrate the occassion, we're featuring some of the best AR apps and games on... | Read more »
Phoenix Wright: Ace Attorney - Spirit of...
Phoenix Wright: Ace Attorney - Spirit of Justice 1.00.00 Device: iOS Universal Category: Games Price: $.99, Version: 1.00.00 (iTunes) Description: ************************************************※IMPORTANT※・Please read the “When... | Read more »
Kpressor (Utilities)
Kpressor 1.0.0 Device: iOS Universal Category: Utilities Price: $4.99, Version: 1.0.0 (iTunes) Description: The ultimate ZIP compression application for iPhone and iPad. - Full integration of iOS 11 with support for multitasking.-... | Read more »
Find out how you can save £35 and win a...
Nothing raises excitement like a good competition, and we’re thrilled to announce our latest contest. We’ll be sending one lucky reader and a friend to the Summoners War World Arena Championship at Le Comedia in Paris on October 7th. It’s the... | Read more »
Another Lost Phone: Laura's Story...
Another Lost Phone: Laura's Story 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Another Lost Phone is a game about exploring the social life of a young woman whose phone you have just... | Read more »
The Witness (Games)
The Witness 1.0 Device: iOS Universal Category: Games Price: $9.99, Version: 1.0 (iTunes) Description: You wake up, alone, on a strange island full of puzzles that will challenge and surprise you. You don't remember who you are, and... | Read more »
Egg, Inc. guide - how to build your gold...
Egg, Inc.'s been around for some time now, but don't you believe for one second that this quirky clicker game has gone out of style. The game keeps popping up on Reddit and other community forums thanks to the outlandish gameplay (plus, the... | Read more »
The best deals on the App Store this wee...
Good news, everyone! Your favorite day of the week has arrived at last -- it's discount roundup day! This fine Wednesday evening we're gathering up the hottest deals on the App Store. We've got action platformers, we've got puzzle games, we've got... | Read more »

Price Scanner via MacPrices.net

Apple Offering Up To $455 Credit Toward iPhon...
iPhone 8 and 8 Plus are now available at the Apple Store, and you can receive up to $375 credit toward a new iPhone purchase when you trade in your eligible smartphone. Photo Courtesy Apple Just... Read more
AnyTrans Offers iOS Users Three Ways For Movi...
iMobie Inc. today announceed AnyTrans v6.0.1, which now can help iOS users move all data to iPhone 8/8 Plus seamlessly. The software is available both on Mac and Windows and fully able to move all... Read more
Snag a 13-inch 2.3GHz MacBook Pro for $100 of...
B&H Photo has 2017 13″ 2.3GHz MacBook Pros in stock today and on sale for $100 off MSRP, each including free shipping plus NY & NJ sales tax only: – 13-inch 2.3GHz/128GB Space Gray MacBook... Read more
Verizon offers new iPhone 8 for $100-$300 off...
Verizon is offering the new iPhone 8 for up to $300 off MSRP with an eligible trade-in: • $300 off: iPhone 6S/6S Plus/7/7 Plus, Google Pixel XL, LG G6, Moto Z2 Force, Samsung Galaxy S7/S7 edge/S8/S8... Read more
Apple Refurbished 2017 13-inch MacBook Pros a...
Apple has Certified Refurbished 2017 13″ Touch Bar MacBook Pros in stock today and available for $200-$300 off MSRP. A standard Apple one-year warranty is included with each MacBook, and shipping is... Read more
OWC USB-C Travel Dock with 5 Ports Connectivi...
OWC have announced the new OWC USB-C Travel Dock, the latest addition to their line of connectivity solutions. The USB-C Travel Dock lets you connect its integrated USB-C cable to a Mac or PC laptop... Read more
Pelican Products, Inc. Unveils Cases For All...
Pelican Products, Inc. has announced the launch of its full line of cases including Voyager, Adventurer, Protector, Ambassador, Interceptor (for the Apple iPhone 8 and 8 Plus backwards compatible... Read more
$100 off new 2017 13-inch MacBook Airs
B&H Photo has 2017 13″ MacBook Airs on sale today for $100 off MSRP including free shipping. B&H charges NY & NJ sales tax only: – 13″ 1.8GHz/128GB MacBook Air (MQD32LL/A): $899, $100 off... Read more
Apple restocks Certified Refurbished 13-inch...
Apple has Certified Refurbished 2015 13″ MacBook Airs available starting at $719 and 2016 models available starting at $809. An Apple one-year warranty is included with each MacBook, and shipping is... Read more
Is iPhone X Really The Future Of The Smartpho...
Should iPhone X even be called a telephone? It does of course support telephony and texting, but its main feature set is oriented to other things. It is also debatable whether it makes any rational... Read more

Jobs Board

Specialist - Retail Customer Services and Sal...
The position listed below is not with Tennessee Interviews but with Apple , Inc. Tennessee Interviews is a private organization that works in collaboration with Read more
Specialist - Retail Customer Services and Sal...
The position listed below is not with South Carolina Interviews but with Apple , Inc. South Carolina Interviews is a private organization that works in collaboration Read more
Behavior Technician with *Apple* Consulting...
The position listed below is not with Washington Interviews but with APPLE CONSULTING Washington Interviews is a private organization that works in collaboration Read more
Infection Control RN with *Apple* Rehab - A...
The position listed below is not with Georgia Interviews but with Apple Rehab Georgia Interviews is a private organization that works in collaboration with Read more
Specialist - Retail Customer Services and Sal...
The position listed below is not with South Carolina Interviews but with Apple , Inc. South Carolina Interviews is a private organization that works in collaboration Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.