"Ian Bartholomew" <
[hidden email]> wrote in message news:<ZDDr9.3483$Lm1.282952@stones>...
> Hi,
>
> > I'm a beginer
>
> Welcome
>
> > and I'm trying to make a simple GUI with buttons. But all
> > I'm getting is an disabled Button, when I'm evaulating the code.
> >
> > Does anybody know what is wrong, what should I do.
>
> When you add the button to the Shell (in the ViewComposer) you should set
> the 'command' aspect for the button to a Symbol. This is the Symbol that is
> "sent" when the button in pressed.
>
> In your Shell (or one of it's superclasses) you should add an instance
> method with a selector which _must be_ the same as the Symbol you use above.
>
> Until the method is present the button will be disabled. Try this -
>
> Add the following to a workspace, select it all and evaluate it. You should
> see a shell with a single button, but the button is disabled as there is no
> method in the image with the selector #buttonPushed
>
> s := Shell show.
> s view addSubView: (p := PushButton new).
> p position: 100@100.
> p command: #buttonPressed.
> p text: 'Press Me'
>
> If you now add the following instance method to the Shell class and then
> re-evaluate the code above the button should now be enabled (because there
> now is a method available with the correct selector) and when it is pressed
> the message box should be displayed.
>
> buttonPressed
> MessageBox notify: 'Pressed'
>
> Note
> - I'm not suggesting you should normally add methods to Shell like this,
> using inheritance just makes the above example easier
> - There are ways of enabling/disabling buttons dynamically, but that is
> probably better as lesson 2
>
> Ask again if you need help in translating the above to your own class.
>
> Regards
> Ian
Thanky you very much for this example.
If it's not a problem, I would like to see how that works in my own
class.
If you could show me a simple example, to see how it works. I will be
really greatful.
Rok
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