Re: Gtk::Button minor problems

["Andrew E. Makeev" <andrew solvo ru>]

В Пнд, 26/02/2007 в 02:29 -0800, johnmb пишет:
> My gtkmm / gtk+ project is running well bar a couple of minor problems to do
> with buttons and I wonder whether anyone has any suggestions.  My problems
> are :-
> 
> 1.)   If I click on a button, it responds as it should and my signal
> connection activates the appropriate methd.  If, however, I cliock on the
> same button without moving the mouse pointer, it doesn't respond no matter
> how many times I click.  If I then move away from the button and click
> somewhere else and then move back to the button and click, it works again.
> 
> 2.)  Generally, the buttons work OK, but occasionally a button will stick
> down without activating its signal.  I hasve to click on it again to free it
> and activate the signal.
> 
> It could be that these problems have the same root - I don't know but any
> suggestions are welcome.
> 
> John

There is issue:
http://bugzilla.gnome.org/show_bug.cgi?id=56070

In my application I have to use some trick to fix that problem:

        void fix_button( GtkWidget* widget )
        {
             gint width, height;
             gint x, y;

             g_return_if_fail( GTK_IS_BUTTON( widget ) );

// button dimensions
             width = widget->allocation.width;
             height = widget->allocation.height;
// mouse pointer in widget coordinates
             gtk_widget_get_pointer( widget, &x, &y );
// check if pointer is over button
             if( x >= 0 && x < width && y >= 0 && y < height )
                 GTK_BUTTON( widget )->in_button = true;
// setting
        }

you should call that function, when signal_clicked() handler is done.

File gtkbutton.c.
There is function gtk_button_grab_notify() that drop in_button flag.
Also, gtk_button_update_state() drops in_button flag when button widget
is insensitive, but doesn't restore it in other case.

So, when you hit button first time it works well, and drops in_button
flag. Now if you don't move mouse pointer out-in button area it won't
generate signal "clicked" anymore.

Regards,
-andrew

PS
It would be great if you could specify GTK+, GTKMM versions you have
installed.