David Bustos <[EMAIL PROTECTED]> writes:
> I'm trying to make a list that only appears while the pointer is over it
> and is hidden otherwise. After playing with show(), hide(), and (un)map(),
> I'm currently trying GtkNotebook. I've connected set_page methods to the
> {enter,leave}-notify-event signals of the notebook (see below), but when
> the clist page comes up, more enter/leave signals are emitted and the
> notebook flickers, even though I haven't enabled the
> {ENTER,LEAVE}_NOTIFY_MASK on the clist.
>
> Now how can I prevent this, or is there a better approach?
You get notify-events not only for entering and leaving the notebook
window, but also for the child windows. So you want to switch pages
only when event.detail != NOTIFY_INFERIOR.
When the notebooks has tabs, there is one point (above the left tab in
your example), where you get a NOTIFY_ANCESTOR and it starts looping
again, but excluding NOTIFY_ANCESTOR also doesn't give the behaviour
you want. I don't know what happens here.
If you don't need tabs for your notebook, switching on
NOTIFY_NONLINEAR (or != NOTIFY_INFERIOR) seems to work.
Btw., the definition of "notify detail" in X.h is
#define NotifyAncestor 0
#define NotifyVirtual 1
#define NotifyInferior 2
#define NotifyNonlinear 3
#define NotifyNonlinearVirtual 4
#define NotifyPointer 5
#define NotifyPointerRoot 6
#define NotifyDetailNone 7
while in GTK.py we have
NOTIFY_ANCESTOR = 0
NOTIFY_VIRTUAL = 1
NOTIFY_INFERIOR = 2
NOTIFY_NONLINEAR = 3
NOTIFY_NONLINEAR_VIRTUAL = 4
NOTIFY_UNKNOWN = 5
Does anyone have an explanation for the difference?
> ---------------------------------------------------------------------------
> from gtk import *
>
> w = GtkWindow()
> w.set_usize(100,200)
> w.connect('destroy', mainquit)
>
> nb = GtkNotebook()
> nb.set_show_tabs(TRUE)
> nb.add_events(GDK.ENTER_NOTIFY_MASK | GDK.LEAVE_NOTIFY_MASK)
> w.add(nb)
>
> nb.insert_page(GtkLabel('A page.'), GtkLabel('A tab'), 0)
>
> clist = GtkCList(2, ('Stuff', ''))
> for i in range(5): clist.append(('item', `i`))
> nb.insert_page(clist, GtkLabel('Another tab'), 1)
>
> nb.connect('enter-notify-event', lambda nb,event: nb.set_page(1))
> nb.connect('leave-notify-event', lambda nb,event: nb.set_page(0))
>
> w.show_all()
> mainloop()
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