Cool - thanks Jody. Yep, a mouse wheel tool sounds like a good idea...
Since posting that I also thought I'd hack my local JMapPane to get the same behaviour with up and down arrow key strokes... actually '+' and '-' would probably be better. Also the class is crying out for a method to set the zoom factor. I suspect there are a few people who, like me, have a locally modified version of JMapPane. The class still seems to be used a lot judging by messages here, while there are very few mentions of Johann's 'pending' classes. I know at some stage there is meant to be a beautiful new rendering system but in the meantime perhaps it would be useful to do some housekeeping and tweaks of the JMapPane code. Ian's last commit was mid-2007. Michael 2009/2/16 Jody Garnett <jody.garn...@gmail.com>: > Thanks; once again added to the user guide: > - http://docs.codehaus.org/display/GEOTDOC/MapPane > I actually think we could set up a tool to respect mousewheel events; but > have not looked at it. > > On Thu, Feb 5, 2009 at 10:48 AM, Michael Bedward <michael.bedw...@gmail.com> > wrote: >> >> Perhaps the easiest way of doing it, without sub-classing JMapPane, is >> something like this... >> >> // somewhere in your code... >> double clickToZoom = 0.1; // 1 wheel click is 10% zoom >> >> // wheel event handler >> public void handleMouseWheelEvent(MouseWheelEvent ev) { >> int clicks = ev.getWheelRotation(); >> // -ve means wheel moved up, +ve means down >> int sign = (clicks < 0 ? -1 : 1); >> >> Envelope env = mapPane.getMapArea(); >> double width = env.getWidth(); >> double delta = width * clickToZoom * sign; >> >> env.expandBy(delta); >> mapPane.setMapArea(env); >> mapPane.repaint(); >> } >> >> >> Warning: I can't test this because I don't have a mouse wheel :-) >> >> Michael >> >> >> ------------------------------------------------------------------------------ >> Create and Deploy Rich Internet Apps outside the browser with >> Adobe(R)AIR(TM) >> software. With Adobe AIR, Ajax developers can use existing skills and code >> to >> build responsive, highly engaging applications that combine the power of >> local >> resources and data with the reach of the web. Download the Adobe AIR SDK >> and >> Ajax docs to start building applications >> today-http://p.sf.net/sfu/adobe-com >> _______________________________________________ >> Geotools-gt2-users mailing list >> Geotools-gt2-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
