Re: Equivalent to Xt translation manager (XtAppAddActions() etc.)?

[Toralf Lund <toralf procaptura com>]

Paul Davis wrote:

> On Tue, 2005-08-09 at 17:53 +0200, Toralf Lund wrote:
>
>  
>
> > So how are the high-level widget signals (like item selection, button 
> > press etc.) implemented, then? Via lots of explicit tests etc. in event 
> > handlers? In Xt those were also defined via the translation manager, I 
> > believe...
> >    
>
> i think you're mixing different things here.
>  
No, I don't think I am. See below.

> mouse button press is a low level X event. widget button press is a
> fairly complex thing to handle, and it was complex in Xt as well.
> however, its handled entirely by a GtkButton widget; it is rare that app
> code has to deal with it unless the app is implementing a new button
> widget type, which is unusual.
>  
I never said it did. I was just trying to point out that Xt had generic 
code that would record those complex sequences of events, which 
obviously also made the widgets themselves easier to implement 
(*someone* also has to maintain the code for GtkButton, right?) in 
addition to being available to application programmers.

> item selection is handled by explicit and complex code but only in the
> base type of widget(s) that do such things. it does not need to be coded
> over and over again.
>  
Yes and no. I think there is something that has to be coded over again 
unless there is something like the translation manager, i.e. the actual 
recording of the event sequence.

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