Jean-Marc Lasgouttes wrote:
> Angus> Conceptually, doing so is easy. We just need to tell the Dialog
> Angus> that the buffer has become readOnly, no? That way, the OK and
> Angus> Apply buttons will be disabled.
>
> Angus> Here's an unchecked implementation of the idea. Frontend only.
> Angus> No hooks from the core. However, I'm sure that you'll be able
> Angus> to turn this into working code ;-)
>
> Angus> We need a member function in frontends/Dialogs.[Ch] that is
> Angus> called when the cursor is moved somewhere illegal. Eg
>
> What we could do too is to call some Dialogs::update() method at the
> same time menus and toolbars are updated. This method would tell each
> open dialog to update itself. The Label dialog would call getStatus on
> LFUN_INSERT_LABEL to see whether insertion is currently possible.
>
> But maybe is it what you are proposing :)
>
> JMarc
I'm not sure it is. I understood Georg as saying that he'd like to prevent
the Ok,Apply buttons of a certain dialog from being pressed when the
cursor was at a certain position.
Cursor moved to X -> illegal to Apply Label dialog. Deactivate.
Cursor moved to Y -> legal to Apply Label dialog. Reactivate.
The point being that the core would explicitly tell individual (named)
dialogs when it was illegal to Apply their contents.
Your suggesting (if I understand correctly) that each and every open
dialog should recieve notification that it should call getStatus to
ascertain whether the Button Controller should be (de-)activated.
On reflection, I like your suggestion much better ;-)
Notification would be received by one of:
* Each dialog connects to a "check_status" signal held in the
frontends/Dialogs.h file. This signal is emitted when the menus and
toolbars are updated.
* by being called by a frontends/Dialogs.h check_status() member function.
This member function is called when the menus and toolbars are updated. In
turn, it calls a check_status() member function for each open dialog.
Historically, signals were a PITA so I've tried to use member functions.
--
Angus
