Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!ontek!eric
From: eric@ontek.UUCP (Eric Hanson)
Newsgroups: comp.windows.x
Subject: Window sizes in X11R3
Keywords: X11R3 Window
Message-ID: <890@ontek.UUCP>
Date: 9 Jan 90 19:20:56 GMT
Organization: Ontek Corporation, Laguna Hills, CA
Lines: 33

I hate to interrupt the R4 discussion, but I've got an R3
question...

I've created a "graphing" widget (essentially a Window with
an extensive display routine) for my own work, which I
use inside of a standard Xaw Viewport Widget. On a recent, very
large, graph, I noticed the Viewport's scrollbars acting
strangely as I scrolled away from (0,0). After a little debugging, 
I discovered that the graph widget's height exceeded 45,000 pixels
-- I overshot the magic 32767 limit on short integers.

A little research led to the following:
1)  Widgets deal in "shorts." The x,y,width,height fields on
    the core structure use types Position and Dimension, which are
    defined as short and unsigned short in Intrinsic.h.
2)  Windows use "int" for x,y,width,height, at least according to
    the Xlib procedure params and the Window Attribute structures.
    On my Sun 4, ints are 32-bit. Therefore, it would seem that X
    would allow a 2 billion x 2 billion sized window.

And now for the questions...
1)  Does this mean that the largest allow widget size is 32K?
2)  What would happen if I changed Position & Dimension in
    Intrinsic.h to ints, and remade X?
3)  Am I insane for wanting such big windows?

Sorry if any of this has been hashed out before, but would those in
the know please respond ASAP -- it's deadline time again!!

Thanks in advance, 
Eric Hanson                           ...!uunet!ontek!eric
Ontek Corporation
Laguna Hills, CA