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From: nick@lfcs.ed.ac.uk (Nick Rothwell)
Newsgroups: comp.sys.mac.programmer
Subject: "DeltaMoveWindow"?
Message-ID: <1908@etive.ed.ac.uk>
Date: 3 May 89 10:40:16 GMT
References: <1907@etive.ed.ac.uk>
Sender: news@etive.ed.ac.uk
Reply-To: nick@lfcs.ed.ac.uk (Nick Rothwell)
Organization: LFCS Enya Admiration Society
Lines: 25

I was rather surprised to find that the Window Manager doesn't have a
DeltaMoveWindow trap - there's only MoveWindow, which is absolute. I have
an application where each "document" (for want of a better word) appears
in a number of small windows with WIND templates held in a resource file.
If I'm opening several "documents" at once, I want the appearance of the
windows to be staggered slightly in a diagonal down the screen, so that
they're all visible. So, I had to hack up a "DeltaMoveWindow". This is what
I came up with - ugly, but it seems to work. If anybody has a nicer way of
doing this, I'd really like to know...!

	static void deltaMoveWindow(win, dx, dy)
	WindowPtr win;
	int dx, dy;
	{
		int oldX = -((WindowPeek) win)->port.portBits.bounds.left,
			oldY = -((WindowPeek) win)->port.portBits.bounds.top;

		MoveWindow(win, oldX + dx, oldY + dy, false);
	}

		Nick.
Nick Rothwell,	Laboratory for Foundations of Computer Science, Edinburgh.
		nick@lfcs.ed.ac.uk    <Atlantic Ocean>!mcvax!ukc!lfcs!nick
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