On Tue, 16 Nov 2010 22:50:05 Kellomaki Pertti (Nokia-MS/Tampere) wrote:
> Is it possible to have executable code as part of a model element? In a
> hypothetical Scheme based QML I could create a list model that contains
> <string, procedure> pairs, and then in a list view a delegate could
> simply call the procedure:
>
> (define file-menu
> (list
> (list "Save"
> (lambda () (save-file))) ; executable code
> (list "Quit"
> (lambda () (quit))))
>
> Does QML allow something like this, or is there some other convenient
> way to glue together e.g. labels and actions?
While I'm going to withhold judgment for now on whether what I'm suggesting is
a good idea, you can just have strings of javascript in the model and execute
them with eval(). e.g
ListModel{
ListElement{
name: "Save"
action: "saveFile()"
}
ListElement{
name: "Quit"
action: "Qt.quit()"
}
}
and inside the delegate somewhere: eval(action);
Not quite the same as your example, because the code as a string will be
evaluated in the context of wherever eval was called but if save-file() was
still visible in that context then it would work.
--
Alan Alpert
Software Engineer
Nokia, Qt Development Frameworks
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