Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!mit-eddie!bu-cs!purdue!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!ukc!mupsy!liv-cs!phil From: phil@mva.cs.liv.ac.uk Newsgroups: comp.sys.mac.programmer Subject: help needed dragging a non-rectangular PICT Message-ID: <6095@mva.cs.liv.ac.uk> Date: 6 Dec 88 17:30:34 GMT Lines: 22 Organisation: Computer Science CSMVAX, Liverpool University Attention Mac Programming experts! I'm writing a program in which I'd like to drag a PICT across a background, and have it update the background as I move the item across it. Just like the way that MacPaint et al do. Any hints or pointers to how to do it would be most appreciated. My thoughts were to draw the items in the background to an offscreen bitmap and use copybits when an update is required (faster than re-drawing individual items?), but how do I draw the non- rectangular "dragged" item without it erasing all sorts of stuff - if you know what I mean. To would be mailers - the ukc gateway refuses to mail stuff on to me, all I get is a tantalising message containing the subject line. If the mail comes through Earn then it's usually OK. Phil Jimmieson, *************************************************** Computer Science Dept., * * Liverpool University, * JANET : PHIL@UK.AC.LIV.CS.MVA * Merseyside, England, * ARPA : PHIL%mva.cs.liv.ac.uk@cunyvm.cuny.edu * L69 3BX * * * old address SQPHIL@UK.AC.LIV.CSVAX may work * (UK) 051-794-3689 ***************************************************