Re: [gtk-list] Re: Getting check button children

[Eric Harlow <linuxgeek yahoo com>]

The problem is that you have an event handler on the "clicked" event
which ends up firing the "clicked" event.  There are many ways of
handling this.  A static variable in the function might be the easiest
way.  Something like

setStateFalse ()
{

static int bInLoop = 0

    if (bInLoop == 0) {
        bInLoop = 1;
        // --- put your code here that changes
        //     the state
        bInLoop = 0;
    }
}

This will have the effect of not going into the loop if the function
is already in the middle of a call.  Of course, you can always use
*real* semaphores instead of a static variable. 

 -Eric


---"Buch, William H." <bbuch@hqm.com> wrote:
>
> how should i call a mouse event against a check button?  currently i
am
> doing the following:
> 
> gtk_signal_connect(button, "clicked", function, pointer data)
> 
> i guess that isn't correct?
> 
> -bill
> 
> -----Original Message-----
> From: Eric Harlow [mailto:linuxgeek@yahoo.com]
> Sent: Saturday, July 11, 1998 8:15 PM
> To: BBUCH@JERRY.hqm.com
> Subject: [gtk-list] Re: Getting check button children
> 
> 
> 
> Without seeing how you're installing the event handler / signal
> handler, it's hard to say.  Check to see which events the buttons are
> handling.  The gtk_toggle_button_set_state button does call the
> gtk_button_clicked function which, I believe, ends up signaling a
> "button_clicked" and if you're listening to it and calling
> setStateFalse from there, that might cause an infinite loop to occur.
> 
>  -Eric
> 
> 
> 
> ---"Buch, William H." <bbuch@hqm.com> wrote:
> >
> > I used erics children get procedure and it works.  but when i try to
> > change the state of the check button, i get into an endless loop and
> > then it segment faults on me.  here is the code below:
> > 
> > GtkWidget parent = gtk_widget_get_ancestor(widget,
> gtk_hbox_get_type());
> > 
> > i have three check boxes packed into a hbox, which i got above.
then:
> > 
> > gtk_container_foreach(GTK_CONTAINER(parent),
> > 	(GtkCallback) setStateFalse,
> > 	NULL);
> > 
> > void setStateFalse(GtkWidget *widget, gpointer data)
> > {
> > 	if(GTK_IS_TOGGLE_BUTTON(GTK_OBJECT(widget)))
> > 		printf("toggle");
> > }
> > 
> > the above works.  it prints out three toggle messages which it
should
> > because there are three toggle buttons.
> > but this one doesn't work.
> > 
> > void setStateFalse(GtkWidget *widget, gpointer data)
> > {
> > 	if(GTK_IS_TOGGLE_BUTTON(GTK_OBJECT(widget))) {
> > 		gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(widget),
> > FALSE);
> > 	}
> > }
> > 
> > if i would stick a printf("toggle") into that, i get a lot of toggle
> > messages printed to the screen.  is there something wrong that i am
> > doing?  i need to HELP! :)
> > 
> > thanks in advance
> > 
> > Bill
> > 
> > -- 
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> /dev/null
> > 
> > 
> 
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