Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!andrew.cmu.edu!wjh+ From: wjh+@andrew.cmu.edu (Fred Hansen) Newsgroups: comp.cog-eng Subject: Re: Multi-button mice (Re: Xerox sues Apple!) Message-ID: Date: 10 Jan 90 19:31:05 GMT References: <172@comcon.UUCP> <7326@ficc.uu.net> <9320@hoptoad.uucp> <1989Dec18.081450.28019@psuvax1.cs.psu.edu> <4865.258f9c91@mva.cs.liv.ac.uk>, <581@cadlab.cadlab.de> Organization: Information Technology Center, Carnegie Mellon, Pittsburgh, PA Lines: 24 In-Reply-To: <581@cadlab.cadlab.de> Excerpts from netnews.comp.cog-eng: 9-Jan-90 Re: Multi-button mice (Re: .. Charles White@cadlab.UUC (193) > Why on earth would anyone implement a scrollbar that used more then one button? Because a click on one button does a page down operation toward the tail end of the document and a click on the other button does a page up operation to move toward the top of the document. In my case, at least, I do not always want to scroll forward; sometimes I want to back up. And I would like to be able to scroll forward sometimes by a little bit and sometimes by a lot. On my favorite editor a click on the left button scrolls forward by the distance between the top of the window and the place where I click. A click on the right button goes the other direction. As a result, I can leave the mouse in one place and move about the document. (I have a real problem with scroll bars which reverse direction just because the elevator image has moved past the mouse. All of a sudden the clicks I was using to move toward the tail end of the document are now moving me in the other direction.) Fred Hansen