Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!uunet!ispd-newsserver!hoffmann
From: hoffmann@acl.kodak.com (marty hoffmann)
Newsgroups: comp.sys.amiga.programmer
Subject: RE:  Prop gadgets and FOLLOWMOUSE
Message-ID: <1991Feb8.213305.15745@ssd.kodak.com>
Date: 8 Feb 91 21:33:05 GMT
Sender: news@ssd.kodak.com
Distribution: usa
Organization: Eastman Kodak
Lines: 19
Originator: hoffmann@acl


John Lee asked about using FOLLOWMOUSE to track a proportional gadget.
The fact that the messages related to FOLLOWMOUSE point to the window
and not the gadget is probably not a bug.

If I want to update screen information (like a counter) while the user
slides a proportional gadget, I create the gadget with GADGIMMEDIATE 
and RELVERIFY.  When I get a GADGETDOWN message for the gadget, I 
enter a tight loop, reading the pot values directly from the PropInfo
structure and updating the screen accordingly.  The exit condition for
the loop is receiving the corresponding GADGETUP.  When I exit the
loop, I read the pot values and update the screen one last time.

I never use FOLLOWMOUSE in this respect.

The above idea works even if the user clicks on the gadget without 
dragging it.

						Marty Hoffmann