Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!stan!marvin!toml
From: toml@marvin.Solbourne.COM (Tom LaStrange)
Newsgroups: comp.windows.x.motif
Subject: Re: What is the best way to iconify/deiconify?
Message-ID: <TOML.91May8101432@marvin.Solbourne.COM>
Date: 8 May 91 14:14:32 GMT
References: <9105071922.AA15644@15644> <9105081533.AA19820@osfsun>
Sender: toml@solbourne.com (Tom LaStrange)
Distribution: inet
Organization: Solbourne Computer, Inc.
Lines: 49
In-Reply-To: wwang@osf.org's message of 8 May 91 08:33:45 GMT

|> Jerry:
|> 	Here are the code segments:
|> 
|> /* check the window state, call it when you get a PropertyNotify event */
|> void checkState(w, cd, event)
|> Widget w;
|> char *cd;
|> XPropertyEvent *event;
|> {
|>   Arg args[1];
|>   Boolean iconic;
|>   Atom actual_type, atom;
|>   int  actual_format;
|>   unsigned long nitems, bytes_after;
|>   unsigned char *data;
|>   long     *state;
|> 
|>     atom = XInternAtom(display, "WM_STATE", False);
|> 
|>     XGetWindowProperty(display, window, atom,
|> 		       0L, 1L, False, AnyPropertyType,  &actual_type,
|> 		       &actual_format, &nitems, &bytes_after, &data);
|> 
|>     printf("actual_type: %s, actual_format: %d, nitems: %d, bytes_after: %d\n",
|> 	   XGetAtomName(dpy, actual_type), actual_format, nitems, bytes_after);
|> 
|>     state = (long *)data;
|>     if (*state == NormalState) printf("NormalState\n");
|>     if (*state == IconicState) printf("IconicState\n");
|>     if (*state == WithdrawnState) printf("WithdrawnState\n");
|> 
|>     free(date);
|>     return;
|>   }

This is not a safe thing to do and the ICCCM kind of frowns on it.

   Section 4.1.3.1 WM_STATE

  "In general, clients should not need to examine the contents of this
   property; it is intended for communication between window and session
   managers."

What if the window changes state between the time you you get the property
and return it?  You should watch for and keep track of MapNotify and
UnmapNotify events if you want to track your current state.

--
(I kid you not)Tom LaStrange        toml@Solbourne.COM