How to enable "enter-notify-event" for a GtkImage ?

[Gregory Hosler <ghosler redhat com>]

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Hi all,

on the gtk_widget devhelp page, there is dome documentation about signals common to all
widgets. supposedly.

I have a gtk_image, and i'd like to receive enter/leave notifications.

I have enabled GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK (as near as I can tell) on
the widget (gtk_widget_add_events), and my signal handler just isn't firing...

If I instead enable the NOTIFY_MASK's on an EventBox, then the signal handler see's the
signals.

As a proof of concept, I took the paned.c example from the gtk+ examples, and modified it
(attached) (you'll need to supply your own image :) Anyway, if I change the
g_signal_connect's and the gtk_widget_add_events to the eboxprev (a GtkEventBox), then I
get the interrupts I want. But the problem w/ that approach is that the event box covers
an area greater than the image. I really only want enter/leave on the image.

I know that if I surround the image with an event box, and then surround that with a tight
box (doesn't give extra space to children), with enough layers between the image and the
scroll window, I can get what I want.

But it seems to me that somehow I ought to be able to trigger enter/leave events on the
image itself. Or can not that be done ?

- -Greg

(p.s. I do note the disclaimer surrounding the enter-notify-event/leave-notify-event's. It
says "This signal will be sent to the grab widget if there is one." I suppose the issue is
that the GtkImage isn't "grabbing" the focus, yes ? any way around that ?

- --
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Please also check the log file at "/dev/null" for additional information.
                (from /var/log/Xorg.setup.log)

| Greg Hosler                                   ghosler redhat com    |
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CC = gcc

CFLAGS = -g -Wall                               \
        -DG_DISABLE_DEPRECATED          \
        -DGDK_DISABLE_DEPRECATED        \
        -DGDK_PIXBUF_DISABLE_DEPRECATED \
        -DGTK_DISABLE_DEPRECATED

paned: paned.c 
        $(CC) `pkg-config gtk+-2.0 --cflags --libs` paned.c -o paned $(CFLAGS)

clean: 
        rm -f *.o paned