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From: mouse@LARRY.MCRCIM.MCGILL.EDU (der Mouse)
Newsgroups: comp.windows.x
Subject: Re:  X/DEC WINDOWS : HELP
Message-ID: <9007010722.AA06006@Larry.McRCIM.McGill.EDU>
Date: 1 Jul 90 07:22:23 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 34

> I have just started working with DEC Windows on a DEC workstation.  I
> have some manuals provided by DEC and for programming with DEC
> windows, I felt that the manuals are not so informative.

> I am facing these problems :

> 1. How to rotate text ?  Is there any X routine available?

The core X protocol does not support any sort of non-horizontal[%]
text.  (Various extensions, such as the Display PostScript present in
Sun's X11/NeWS, do.  If you're willing to commit yourself to such a
platform, you may be able to use one of them.  I don't know whether DEC
has such support available or not.)  It is possible to draw the text
into a pixmap, read it back into an image, rotate the image yourself,
and send it back to the server for display.  This will work but it's a
rather ugly kludge and will probably turn out to be excessively slow.
It is also very difficult to cleanly rotate a pixel-based image by
other than multiples of 90 degrees.

[%] It does not support 180-degree rotation; the reason for my phrasing
    it this way is that there *is* support for right-to-left languages
    like Arabic (though not vertical languages like Chinese).

> 2. How to sense the mouse clicks nad get X Y coordinate points?

Speaking at the protocol level, you want ButtonPress events (and
possibly ButtonRelease and/or MotionNotify events as well).  The Xlib
level provides much the same view of things; if you're using a toolkit
or widget set things get more complicated (and I can't help).

					der Mouse

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			new: mouse@larry.mcrcim.mcgill.edu