I am just getting started on this (and java), and have some seemingly basic questions
1. When you want to add your own code to a form, do you just add it to the form class file (ie this is for my own functions which are not related to the code that you enter into framework-generated events etc).
2. Where do you actually put the code to display the initial values in text fields etc (ie is there some particular event exit). I am actually using panels in a tabbed form.
On Thu, 24 Jul 2008 19:40:47 GMT, Ian Semmel <isemmelNOJ...@NOJUNKrocketcomp.com.au> wrote, quoted or indirectly quoted someone who said :
>1. When you want to add your own code to a form, do you just add it to the form class file (ie this is for my own functions which >are not related to the code that you enter into framework-generated events etc).
There is no Form class file I am aware of. You build JPanels and arrange them into JFrames. The JPanels have various JComponents arrayed on them with a layout mananger. Perhaps you are confusing Swing with HTML forms.
There are quite different ways of operationg. HTML Forms are a primitive data input method available in browsers. Swing is a technique used with Applets, Java Webstart or stand alone Java apps.
Roedy Green wrote: > On Thu, 24 Jul 2008 19:40:47 GMT, Ian Semmel > <isemmelNOJ...@NOJUNKrocketcomp.com.au> wrote, quoted or indirectly > quoted someone who said :
>> 1. When you want to add your own code to a form, do you just add it to the form class file (ie this is for my own functions which >> are not related to the code that you enter into framework-generated events etc).
> There is no Form class file I am aware of. You build JPanels and > arrange them into JFrames. The JPanels have various JComponents > arrayed on them with a layout mananger. Perhaps you are confusing > Swing with HTML forms.
> There are quite different ways of operationg. HTML Forms are a > primitive data input method available in browsers. Swing is a > technique used with Applets, Java Webstart or stand alone Java apps.
It's my terminology that's confusing.
What I mean is eg a javax.swing.JDialog source file created when you create a Matisse form in say eclipse.
What I want to know is how do you know when all the fields have been created so that you can then use them.
On Thu, 24 Jul 2008 23:43:45 GMT, Ian Semmel <isemmelNOJ...@NOJUNKrocketcomp.com.au> wrote, quoted or indirectly quoted someone who said :
>What I mean is eg a javax.swing.JDialog source file created when you create a Matisse form in say eclipse.
>What I want to know is how do you know when all the fields have been created so that you can then use them.
I have never used Matisse, so I don't know what sort of code it generates. I presume you can look at it.
I would expect all the Components to be created and hooked up with listeners in the constructor, so all should be ready to go. They might use the addnotify mechanism.
Roedy Green wrote: > On Thu, 24 Jul 2008 23:43:45 GMT, Ian Semmel > <isemmelNOJ...@NOJUNKrocketcomp.com.au> wrote, quoted or indirectly > quoted someone who said :
>> What I mean is eg a javax.swing.JDialog source file created when you create a Matisse form in say eclipse.
>> What I want to know is how do you know when all the fields have been created so that you can then use them.
> I have never used Matisse, so I don't know what sort of code it > generates. I presume you can look at it.
> I would expect all the Components to be created and hooked up with > listeners in the constructor, so all should be ready to go. They might > use the addnotify mechanism.
Yes, those links seem to be about the trouble I was having (not that I fully understand them).
I moved things around in my program and now they seem to work. Previously, I had a null parent on the dialog, now I have a hidden JFrame which I think is the answer.
Ian Semmel wrote: > I am just getting started on this (and java), and have some seemingly > basic questions
> 1. When you want to add your own code to a form, do you just add it to > the form class file (ie this is for my own functions which are not > related to the code that you enter into framework-generated events etc).
> 2. Where do you actually put the code to display the initial values in > text fields etc (ie is there some particular event exit). I am actually > using panels in a tabbed form.
I recommend to read Fowler's "Organizing Presentation Logic". It describes the basic approaches for where to put what.
I provide a presentation at www.jgoodies.com/articles/ "Desktop Patterns & Data Binding" that adds some Java/Swing related diagrams to Fowler's text.
You may also consider studying some of the tutorial sources from my open source JGoodies Binding. There you can see how a (stupid) view class is associated with a presentation logic class that contains all the meat. The "EditorCopyingExample" does not really use an automatic data binding, and so is the simplest example, which may be good for a starting point. See http://www.jgoodies.com/downloads/libraries.html Get the Binding, extract it, look at "src/tutorial".
