Re: Quasi modal application window

[Kent Schumacher <kent structural-wood com>]

Havoc Pennington wrote:

> On Mon, 2 Aug 1999, Kent Schumacher wrote:
> >
> > I would also like to have a single 'stop' button that is active - the pointer should turn back to an 'active'
> > pointer when positioned over this button.  All of the rest of the gui for the applications window should not
> > respond to mouse clicks
> >
> > Any thoughts on how to achieve this behavior?
> >
>
> Just gtk_grab_add() the stop button.
>
> Havoc

I'm seeing an odd thing with gtk_grab_add.   After grabbing the
stop button, I can click on another gtk button in the application and
nothing happens (which is what I want).  If I then move to a third button,
it changes color, and if I click on it it sends the 'clicked' signal.

This is definitely not what I want.

Here is a demo app:  To demonstrate the problem, click on 'locker',
click on 'button 1', click on 'button 2'.  Button 2 will light up and
emit a 'clicked' signal.


#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>

#include <gtk/gtk.h>

static int locked_=0;
static void click_cb(GtkWidget *w, gpointer data) {
   fprintf(stderr,"click_cb: %s clicked\n",data);

   if (strcmp(data,"locker") == 0) {
      if (locked_) {
         fprintf(stderr,"click_cb: Removing grab\n");
         gtk_grab_remove(w);
      } else {
         fprintf(stderr,"click_cb: Adding grab\n");
         gtk_grab_add(w);
      }
      locked_ = (! locked_);
   }
}

int main(int argc, char *argv[]) {
   GtkWidget   *window,*hbox,*button,*locker;

   gtk_init(&argc,&argv);

   window   = gtk_window_new(GTK_WINDOW_TOPLEVEL);

   gtk_signal_connect(GTK_OBJECT(window),"delete_event",gtk_main_quit,NULL);

   hbox     = gtk_hbox_new(0,5);

   locker   = gtk_button_new_with_label("Locker");

   gtk_widget_show(locker);
   gtk_box_pack_start(GTK_BOX(hbox),locker,TRUE,TRUE,0);
   gtk_signal_connect(GTK_OBJECT(locker),"clicked",click_cb,"locker");

   button   = gtk_button_new_with_label("button 1");

   gtk_widget_show(button);
   gtk_box_pack_start(GTK_BOX(hbox),button,TRUE,TRUE,0);
   gtk_signal_connect(GTK_OBJECT(button),"clicked",click_cb,"button 1");

   button   = gtk_button_new_with_label("button 2");

   gtk_widget_show(button);
   gtk_box_pack_start(GTK_BOX(hbox),button,TRUE,TRUE,0);
   gtk_signal_connect(GTK_OBJECT(button),"clicked",click_cb,"button 2");

   gtk_container_add(GTK_CONTAINER(window),hbox);

   gtk_widget_show(hbox);
   gtk_widget_show(window);

   gtk_main();

   return(1);
}