Resource-Based GUIs Vs. Code Generators In Java 164
Java Fan writes, "There is a good debate about GUI generation tools for Java going on at theserverside.com: 'Almost every platform has a visual designer that serializes the GUI to resources (some XML, some proprietary binaries) and then attaches it to the controller at runtime. Apple has had this for years with Interface Builder, Vista has a similar philosophy now as well. Java developers though are left with either hand coding of GUIs or potentially messy and brittle code generators. Neither of which promote good MVC separation. In fact they tend to encourage violations unless you are a very disciplined coder.' Personally, I am partial to BuoyBuilder as a great solution to this issue."
Gee, what a deal! (Score:5, Informative)
Wait, no, sorry. It's not.
Nice slashvertisement.
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Uh... the page says the program is under OSL licence.
id Software licences their crappy, outdated Quake 1 3D engine for bazillion dollorz. Are they evil too?
(Granted, the licence appears a bit problematic. You generally can't claim copyright on the output of your program, if the stuff it generates is based on the user input... Otherwise, pencil makers would be really rich. And limiting the field of use is (AFAI
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Re:Gee, what a deal! (Score:4, Insightful)
That's the ivory tower answer, and from a certain perspective it's true and from a certain perspective it's not.
The last Java shop I worked in wouldn't pay for any development tools. Good tools that were free (as in beer) or close to it were at a premium.
Ivory Tower? (Score:2)
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The Difference Between Theory and Practice (Score:5, Insightful)
In theory, I'm not against the use of a GUI builder as long as it provides a way to use all of the layout managers that are available. I've just never seen one that could scale in complexity to the needs of a real world application. Sooner or later, the functionality requirements drive GUI elements to be created based on configuration settings and/or business rules. That is where you hit the wall with the GUI builder.
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Sorry couldn't resist.
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-matthew
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XMLEncoder/XMLDecoder (Score:5, Informative)
Anyone who's interested in this issue should look into the java.bean.XMLEncoder [sun.com] and java.bean.XMLDecoder [sun.com] classes. These classes are able to serialize and deserialize complete GUIs. In the past, I've used the Netbeans GUI Builder to develop throw-away GUI frontends, then serialized them to a file rather than using them directly. I then built a framework that used the little-known "Name" property on AWT/Swing components to attach actions.
The results were quite good. Not only was the GUI decoupled from the code, but development was actually accelerated as minor GUI hiccups had no effect on the rest of the codebase. The downside was that the XML occasionally had to be tweaked to perfection as the XMLEncoder class was not 100% perfect in serializing some of the finer details.
A few years ago I spoke with one of the Netbeans developers about making the XMLEncoder format the standard for Netbeans. The idea was met with some resistence, seemingly because there was no actual Java-standard framework to target. The JVM base libraries have the Encoder/Decoder routines, but all the rest of the work must be done by the programmer. (Such as attaching the actions to the components.)
Train yourself to use Swing Actions. It seems like you're creating hundreds of little objects, but what you're really doing is encapsulating actual actions in the system away from their physcial controls on screen. So if you have a button, a menu item, and a toolbar item that all do the same thing, a single action can control all three widgets. This helps smooth out issues like keyboard shortcuts, which can get quite confusing when coding a Swing application.
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I've run into issues like that with NetBeans in the past, and it was a serious headache - I never tried the technique you mention.
My biggest issue with Java GUI development, however, is that there is no common codebase for it - if I write a project with Borland JBuilder or whatever, I have to totally redo the GUI in NetBeans or Eclipse. At least, this has been true in my experience with Borland (which was short and negative). Xcode also has this issue.
Can we get something more lik
Re:XMLEncoder/XMLDecoder (Score:5, Informative)
The problem isn't the toolkit. It's the lack of a standard serialized form. In the Windows world, the standard format is known as a "resource file". Since all GUI editors target this resource format, there is no compatibility issues across IDEs. Similarly, GTK+ standardizes on GladeXML from the Glade Interface Designer [wikipedia.org]. So there's no question about what format an IDE should support when adding a GUI Designer.
Swing is one of the few GUI technologies that doesn't have a standard serialized format. The XMLEncoder technology took a step toward solving this, but didn't follow through. The result was that we had a format, but no library to actually wire up a deserialized GUI! (e.g. GladeXML is decoded by libglade) This oversight was rather massive, but ended up being ignored as the focus continued to shift toward server-size J2EE development.
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-WS
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Sort of. In my case, I serialized a running GUI to get the file. I could have hand coded it, but that would have been a pain. Instead, I created it in Netbeans, and ran the class through java.bean.XMLEncoder.
Again, the REAL problem is attaching the actions. (i.e. events, keymappings, etc.) If you think about it, you can't attach an event listener inside an XML file, because the XML file is decoupled from your code. S
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XStream (Score:2, Insightful)
I use XStream [codehaus.org] which is very nice xml serialization utility library. XStream has very nice aliasing abilities, so you can trim the xml to very close to absolute minimum ( 2 minute tutorial [codehaus.org]).
Currently I'm planning on externalizing website validation objects as xml so they can be updated more easily and dynamically. It's basically the same thing you describe and I can easily see how it would help with GUI programming. To get around the "attaching actions to the components" problem you can use the MVC design
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I have played with XStream a bit. It's nice, but it has the disadvantage of (at least when I tried it) not being able to correctly serialize a Swing GUI. The Java Bean libraries are tweaked to understand Swing classes, so they correctly serialize the GUI in nearly all cases. (Minus a few of the fine details I was mentioning.) Deserialization is a minor issue in comparison.
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However, it's not Swing, which may be a problem for some (I personally like SWT better than Swing, but understand that some believe the opposite).
GINAC (Score:4, Interesting)
We started a project along the lines of Interface Builder with a Java Swing implementation for our master's thesis in 2005. It's called GINAC, as in GUI Is Not Application Code [ugent.be].
As I really hate designing GUI's in code, I've started working on it again lately, currently implementing something along the lines of cocoa bindings. If anybody is interested in helping out, let me know!
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You've joined the ranks of Mozilla Firebird, and Jetty, the Tads Virtual Machine [drizzle.com] by trying to make a new project with exactly the same name as an already existing, extremely popular project.
How about you rename it to something that isn't taken?
GINAC=>GINAC is not a computer algebra system [ginac.de]
Step #1 of picking a name for any OSS is looking for it on Google.
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Step #1 of naming *anything* is looking it up on Google.
Re:GINAC (Score:5, Funny)
You should just go the extra few feet and call it "Visually Activated GUI Is Not Application Code".
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VAGINA-Code?
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I thought about this a few years ago. It is technically feasible and if I'm not mistaken, someone at Sun was working on this when Swing first came out, but it never materialized for some reason. I was discouraged from doing anything like this because of that big ugly disclaimer in Swing:
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of
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Huge oversight on Sun's part (Score:4, Insightful)
Is there an accepted good builder now? The article seems to imply this is far from a solved problem. (10 years later!)
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There's Netbeans [netbeans.org] which has a GUI builder. (Which, IMHO, sucks. Or at least did the last time I used it.)
Eclipse [eclipse.org] also has plugins (the Visual Editor) to allow creating GUIs graphically. (Which is, IMHO, worse than Netbeans's.)
So, there are GUI building tools. They just suck. (IMHO, of course.)
Personally I'd like to see something like XUL where the GUI is specified using a markup language. Which is why I started writing one and then never released it.
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Whoever modded your post "Interesting" clearly has a sense of humor.
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http://www.netbeans.org/kb/articles/matisse.html [netbeans.org]
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Is there an accepted good builder now? The article seems to imply this is far from a solved problem. (10 years later!)
Yes [jformdesigner.com]
It supports many layout models [jformdesigner.com] including the JGoodies FormLayout, which is far superior to the old GridLayout system.
I've been using it for the last few years and it works marvelously.
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Re:Huge oversight on Sun's part (Score:5, Interesting)
I'm guessing you really mean GridBagLayout, since GridLayout is a different and very very simple layout.
I realize GridBagLayout is hard to learn, but over the years I've learned that you cannot avoid it.
Sun has tried [sun.com] three [sun.com] times [sun.com] to make a "simple" replacement for GridBagLayout. Each attempt utterly fails as a replacement (but each is useful for some other rare types of layout needs).
I've tried to make my own "simplified" version of GridBagLayout too. In fact, I suspect nearly every intermediate Java GUI programmer tries this at some point; it's almost a rite of passage. And it's always a failure. The reason is that UI layout simply is that complicated, and there's no way around it. If you think it's simpler, then you probably aren't aware of all the issues involved.
A UI builder won't make it any simpler. It will just make it easier for you to ignore the issues. The usual result of such "freedom" is that the resulting UI looks acceptable, but doesn't have acceptable behavior. For instance, to pick a simple case, a scrolling list doesn't resize when the window containing it resizes.
Re: Huge oversight on Sun's part (Score:2)
In fact, my First Rule of Java GUI Development is that any given layout, whether it starts off using a BorderLayout, FlowLayout, or whatever, will eventually get rewritten to use a GridBagLayout. None of the other LMs is sufficiently flexible or powerful, and you always end up hitting one of their limits.
People bemoan the complexity of GBL, but as you say, it's irreducible complexity. (With the possible exception of internal padding, which I never use.)
If there's a problem, it's with Sun's
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http://madbean.com/anim/totallygridbag [madbean.com]
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--Rob
Faces in the Crowd (Score:4, Interesting)
If those APIs don't already exist, reusing an existing one, especially Flash, would offer possibilities for reusing existing components or patterns already populating the Net.
Java could increase its stature among distributed architectures. And make our lives easier.
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> that can dynamically retrieve classes across the network
> at runtime and safely instantiate them.
It's kind of interesting how this feature conflicts with Java's static typing system. I mean, if you're receiving a bytestream across the network you need to have some sort of way to unmarshal it into objects, and doing that in Java involves a fair bit of casting and exception catching. You see the same sort of issues with XML to object
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person = readFromNetworkSocket(); # reads in a Person
puts person.age; # yay, we're calling methods
where you don't have a predefined Person type; instead, the data gets read from the stream and a new type is defined at runtime.
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I'm not sure how you declare the Person class before you instantiate it from the class
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> you instantiate it from the class loaded by the network.
Right, exactly - since Java is statically typed, the type needs to be declared somewhere - probably via an existing interface or base class or some such. That's kind of the beauty of dynamic typing - types don't need to be declared in advance.
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QED, pronounced "talking the talk, not walking the walk".
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Hehe, so true, I feel that way so often! Well, back to reading the Rails 1.2 upgrade notes...
OpenLaszlo's XML data binding approach (Score:2)
Using XML micro-formats is a more dynamic and flexible approach than persistent objects. Your data is much too important to tie it directly to the internal implementation of one particular version of one particular class.
The approach that OpenLaszlo [openlaszlo.org] takes is XML data binding and declarative constraints. You design XML "micro formats" for your data, and then you can write many different views and editors of the same data, by binding different OpenLaszlo classes to the XML data with XPath constraints and
Before everybody called it "AJAX"... (Score:2)
OpenLaszlo [openlaszlo.org] is a great way to write "AJAXian" dynamically downloaded componentized data driven applications, that run in the Flash player and DHTML/JavaScript browsers (and eventually the J2ME Java VM [openlaszlo.org]).
For many years, I've been building distributed data driven scriptable user interfaces, and evangelizing what's now called the "AJAX" architecture. Here are some old articles I wrote about X, NeWS and TCL in the 80's and 90's. Note that in this context "server" means window server (your desktop: once called
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Can I really write a GUI app in OpenLaszlo that compiles cleanly to Java and Flash applets that run close to the same in respective VMs on PCs and mobiles/phones, as well as native apps? Or is it a meta version of Java's "Write Once, Test Everywhere", made intractable by the complexity of target platforms?
Which IDE is best, th
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You can certainly learn the value of the platform without paying for a seminar. The development platform is free since it's open source, and it doesn't cost anything to read the online documentation, the wiki [openlaszlo.org], and get involved with the community [openlaszlo.org].
Of course there are differences between the capabilities of different platforms. OpenLaszlo is most mature on Flash, which runs identically on all platform and browsers, and has great graphics and multimedia capabilities. The DHTML/JavaScript version of OpenLasz
Never heard of Matisse eh ? (Score:5, Informative)
Whenever it comes to Java it always amazes me how many people have very outspoken opinions about it while its almost immediatly obvious that they hardly know what they're talking about. Then again, when reading the article its becoming obvious that when he's talking about GUI's (since when do you code in a GUI? I use an IDE for that) he actually means to say Eclipse. Don't get me wrong: I'm not dissing Eclipse here, but do question his bias.
When it comes to building GUI's Java really allows itself to be used by code generators IMO simply because Java is very modulair build. The only problem you might face here are the somewhat limited layout managers. For the non-Java people amongst us: these basicly define the "interface" between the GUI you're building and the way it behaves. For example; when it comes to resizing or placing of the objects then you're dealing with a layout manager.
Now... When it comes to Java IDE's two names immediatly spring out: NetBeans [netbeans.org] (my personal favorite) and Eclipse. Now that he has commented on the latter let me comment on the first. From NetBeans 5.0 and up it comes with a fancy GUI builder codenamed "Project Matisse". Its official name is now NetBeans Swing GUI builder [netbeans.org]. After taking a closer look at that I wonder if he still thinks that there are no decent GUI builders available for Java.
The real problem here isn't so much the GUI builder but the underlying layout manager which needs to keep things in check. I think that also explains why there isn't much of this available as it looks to me as if there aren't many people about who manage to come up with decent Java coded tools which can be used and adopted by many other coders. NetBeans has solved all this by introducing a layout manager of their own, the so called Absolute Layout. Pro's are its extreme extensiveness, the con's are that if you wish to use it you'll have to ship it with your software because its not part of the standard Java Runtime Environment (JRE).
If you wish to see a demo of Matisse in action then check out the NetBeans flash demos [netbeans.org], especially the first part of "Why NetBeans?". Personally I'd recommend another approach, namely simply downloading NetBeans [netbeans.info] and trying it out for yourself. Its available for Linux, Solaris, Windows and I think even OS X.
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Uhmm.... Matisse sucks. I like netbeans... but I really do hate their GUI builder.
The GroupLayout that they have bundled with it seems to crap out all the time, as previously placed components suddenly go zooming off to one side. or sometimes even out of the bounds of the component entirely, when all I did was add one more component to the parent. The number of headaches this has caused me in the past is enough to make me not even _try_ using it anymore... I now almost always use either gridbaglayout o
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Absolute layout considered harmful because the resulting GUI looks very unprofessional when the containing window is resized. It is difficult and very challenging to create a GUI builder that does not rely on absolute layout, however, it is not impossible.
What I find interesting is the psychology in perceiving different types of GUIs. We don't expect the contents of a web page to resize when we resize the browser window because we view the browser window as a window on the web page document and not the p
Interface Builder (Score:3, Interesting)
Presumably NeXT has had it for even longer, a couple of decades or there abouts. IB was written by a brilliant French coder as I recall... he was a friend of a colleague. Short of firing up my NeXTBox does anyone remember more of the history?
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Anyway I was right about the French connection Jean-Marie Hullot [rixstep.com] and Bertrand Serlet [wikipedia.org] are the authors. Bertrand worked at Inria in the offices next to mine when I was an engineer at the OSF. It is interesting that Simon Patience is director of Engineering at Apple and also worked in the same office block in downtown Grenoble city. I believe their are others too.
cough HYPERCARD cough (Score:2)
HyperCard [wikipedia.org] was originally released with System Software 6 in 1987.
HyperCard was more advanced than NeXTStep in 1987, and in many important ways it is still is more advanced than Cocoa in 2006. In all the 18 years since the release of NeXTStep, it STILL does not let users edit their user interfaces the way HyperCard did. It has none of the user-customizable run-time flexibility, which was one of the most important features of HyperCard: it enabled anyone (even kids) to construct their own user interfaces.
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What planet are you from? HyperCard has been used to develop many different applications, and has inspired a lot of other wonderful user-editable software, such as Wikipedia:
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Can you edit the user interface of a Cocoa application WHILE it's running? Hypercard and OpenDoc were designed to do that. Simply editing a resource file while the program's not running is a different thing entirely. Can you add scripts to the resource files that modify the behavior of the program? Is the system designed to support that, or are you treading on thin ice?
-Don
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I'm not arguing that anyone should be using HyperCard now, nor that it's a replacement for Cocoa. My point is that Apple had all that great stuff like HyperCard and OpenDoc in the past, and they took a big step backwards when they went to NeXTStep, whose architecture was designed 18 years ago, before the web, before XML, back when people were still arguing about Objective C -vs- C++. Third party extension and hacks aside, NeXTStep was designed a LONG time ago, and it wasn't designed to be user extensible l
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It did. IB was a steeper learning curve but built nicer looking (at the time)and more robust interfaces. The Visual Studio GUI builder produced some really messy code as I recall - but I haven't used it since 1993.
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Exciting times and Jobs seems very able to spot winners, a talent the Sculley sorely lacked.
Hybrid approach for fast dev - good code (Score:1)
My approach is to use the GUI designers to quickly prototype the UI and for fast proof of concept. Once I am pretty close to the requirements, it is time to refactor to good coding standards.
With regard to Java, the only approach that I have seen that is flexible and maintainable is to provide the cor
Just Use Swing (Score:3, Insightful)
I can understand why people think they need XML-based systems. So much Swing-based code sucks ass. Putting all of your buttons and frames in a big-ass method is nasty and hard to maintain. Well-thought-out componentized Swing code is easy to maintain and nice to look at. Plus, once you are finished with your project, you can re-use any components you built. Swing is a great library - more people need to just learn it.
IBM's AUIML (Score:1, Interesting)
Apache Velocity (Score:2)
Also one thing that might be worth looking into is Apache's Velocity, templating at a whole new level.
Glade (Score:4, Interesting)
Hand coding GUIs (Score:2)
Hand coding may not promote a clean separation of concerns, but it does nothing to preclude it. Interface generation does not ensure a clean separation of concerns. In fact I doubt that it does anything significant to promote it.
The problem is that the controller tier is still a user interface component, which many engineers don't seem to understand. The achilles heel in most MVC programs are bloated, unmaintainable controllers. You still end up with important assumptions
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I think part of my point is view/controller integration, while not ideal, is not that huge a problem, because they are both user interface elements. What's a big problem is the failure to abstract business domain logic. Whether or not you put it in a "model" tier is mere quibbling. It doesn't matter, as long as its not in the UI. Compared to that the gains of decoupling the view and controller are modest.
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IntelliJ (Score:2, Informative)
TrollTech's Jambi does this quite nicely (Score:2, Informative)
I have to say, I'm pretty impressed so far.
Who builds GUI's anymore.... (Score:1)
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even so, i am impressed with how much can be done with a modern browser.
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Maybe I'd like drag-and-drop of files or images or custom data.
Maybe I don't care for the cardinal UI sin of having scrolling areas inside other scrolling areas.
Maybe I want a context menu.
Maybe I want something HTML doesn't provide, like a table with selectable rows.
Maybe I don't want to worry about disabling the "Back" button.
Maybe I don't want to worry about a user double-clicking a form submit button.
If UI librarie
Serializing GUIs is difficult? (Score:2)
Also, it's difficult to get reuse out of a GUI editing tool, but very easy to get it by hand-coding. I generally write factory-type code that handles generating menus, buttons and linked Actions together, in a GUI tool you will often
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Every java programmer I've known nests BorderLayout and other common layouts that fit the need.
But I understand the Mac interface builder is pretty good. So is the VB one by the way. When either works for all platforms and allows the GUI to be manipulated by code as easily as with java, I may re-evaluate it. (For instance, I used to use VB and
ResEdit (Score:2)
this system was eminently useful in getting mac applications translated into languages other than english, as any user could open the shipping application with resedit, start tra
having trouble digesting this... (Score:3, Insightful)
I don't mean to sound all high and mighty, but if you aren't a disciplined coder, then you're not very serious anyway. You can pre-plan the MVC design to your hearts content, but it takes discipline to stay within the boundaries of the original design. Especially since if you don't then you create one of the worst anti-patterns ever, making you wish you'd just written one monolithic chunk of procedural code because bugs/changes would be doable.
Qt Designer is free (Score:2)
What good resource based GUIs are there? (Score:2)
Maybe using Microsoft's GUI XML
If you haven't used Interface Builder (Score:2, Informative)
In fact, IB should have been named "Object Connector" because it is not a "builder" at all. All IB does is let you inst
The Qt Way (Score:2)
This gives you a lot of flexibilit
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No thank you, what happens when they sell a couple of copies then go under. I am then stuck with some libraries I cannot modify or upgrade and a application that will have to then be redone from scratch. I don't care how fancy your wiz bang cool ui generator is, if I do not have the code it is definitely not going into my app.
Right on their home page:
"BuoyBuilder(TM) is released as Open Source under the OSL license. Royalty-free, commercial licenses are available for purchase."
http://buoybuilder.com/DownloadData/BuoyBuilder-sr c-1.1.zip [buoybuilder.com]
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Perhaps not in a legal sense, but it's a hell of a lot easier to reverse engineer.
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Perhaps not in a legal sense, but it's a hell of a lot easier to reverse engineer.
Also, you can check an XML GUI source into an SCM, and then have a chance of merging and diff'ing it, which is impossible with the binary formats (my one serious gripe over interface builder).
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if you're using a lot of custom components it's more flexible.
The system used by NeXT (and now Apple and GNUstep) in the first RAD tool, was very simple. You create an object graph, and serialise it. In your code, you can create instances of this object graph. This seems to me to be a lot more flexible than having to hard-code the connections.
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And yet, nearly all Java layouts seem to do exactly that. If you don't believe it, arrange some components into a GridBagLayout with at least tw
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