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From: E_CMA@vaxa.nerc-murchison.ac.uk
Newsgroups: comp.windows.x
Subject: Re: POPUP menu issue continue ...
Message-ID: <9106282116.AA16358@ucbvax.Berkeley.EDU>
Date: 28 Jun 91 10:55:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 96

> The second one remains for which I could not popup different menus by
> depressing different buttons(Button1, Button2, and Button3). I only can
> get one by btn3.

You would appear to be missing a few bits of code. Your event loop picks 
up the generic keypress events but only recognises Button3 events as
relevant to popup menus. (See the documentation for the attributes of
XmRowColumn.) To override this you must set the XmNwhichButton resource
for the menus you attach to each mouse button....

In main()
...setting XmNwhichButton  for each menu... (if you are using
 XmCreatePopupMenu, put these in the argument lists)

    XtSetArg(wargs[0], XmNwhichButton, Button1);
    XtSetValues(menu_1,wargs,1);

    XtSetArg(wargs[0], XmNwhichButton, Button2);
    XtSetValues(menu_2,wargs,1);

    XtSetArg(wargs[0], XmNwhichButton, Button3); 
    XtSetValues(menu_3,wargs,1);   

Alternatively, you can set the XmNwhichButton resource in the UIL
file if you use one,  where your popup menus are defined as unmanaged 
children of your drawing area widget. I prefer that method myself.
Button3 is the default button for popups, which is why that works already.
 
    /*
     * set up event handlers for each of the popup menus
     * insert these just before your event loop
     */
    XtAddEventHandler(host_widget,     /* = widget within which 
                                          the event is recognised*/
                      ButtonPressMask, 
                      False,
                      post_menu,
                      menu_1);  

 /* then do the same for menu_2 and menu_3... */

   XtAddEventHandler(host_widget,     
                     ButtonPressMask, 
                     False,
                     post_menu,
                     menu_2);  

   XtAddEventHandler(host_widget, 
                     ButtonPressMask, 
                     False,
                     post_menu,
                     menu_3);  
 ...

/*
 * --------------------------------------------------------------------------
 * post_menu ()
 *
 * c.f.from Young p97  make popup menu appear at sprite position
 * --------------------------------------------------------------------------
 */
void post_menu (Widget w, Widget menu, XEvent *event)
 {
  Arg wargs[10];
  int button;

   XtSetArg(wargs[0], XmNwhichButton, &button);
   XtGetValues(menu, wargs, 1);

   if(event->xbutton.button == button)
   {
        XmMenuPosition(menu,event);
        XtManageChild(menu);
   }
 }
/*
 * === End of post_menu_handler =========================================
 */

I hope the above will be of help

 Cheers
    Carolyn Allen

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