Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!SUN.COM!dshr
From: dshr@SUN.COM (David Rosenthal)
Newsgroups: comp.windows.x
Subject: Re: WM_ICON_SIZE
Message-ID: <9002122303.AA02066@devnull.sun.com>
Date: 12 Feb 90 22:49:33 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 27

> The Xlib XSetIconSizes allows you to set the WM_ICON_SIZE property to
> a list of XIconSize structs. (Similarly, XGetIconSizes allows you to
> read a list of XIconSize structs off the property.) Now in the IC3M
> (v1.0), it does not say anything about putting more than the
> equivalent of one XIconSize struct on the WM_ICON_SIZE property. 
> 
> Am I understanding this correctly?
> Is this an upward extension on the IC3M?

No,  you are not.  Section 4.1.3.2 does not restrict the property to
containing only a single instance of the structure.  Note,  however,
that the contents of a single instance of the property allow the WM
to express a series of possible icon sizes.

> Is an IC3M compliant application, free to ignore anything past the
> 	first struct? 

Well,  the window manager has complete control over the size (and
even the existence) of icons.  So even if you provide an icon of
a particular size the WM may override it.  The information in
WM_ICON_SIZE is just a hint,  you are free to ignore even the
contents of the first struct if you want to.  But it would be
best to take account of WM_ICON_SIZE and choose one of the sizes
specified by one of the structs therein.  Everything will
work if you always choose from the first struct's series.

	David.