Andre M. Winter - Carto.net schreef: First of all, thanks for the elaborate answer.
>hi Jeroen, > > > >>Zoom & Pan operations on SVG maps are quite common. Mostly those >>operations are implemented changing the viewBox attributes. >> >> > >the problem is that viewBox manipulations are incompatible with >currentScale/Translate because on every setting of new viewBox values >currentScale/Translate gets set to 1,0,0 whatever they may have been set >before. you should never mix those two methods, unless you know exactly >what you do (btw i never saw an example doing that and this may be a >stong enough argument...) > > > I see. The question I was actually posing was if the currentScale/Translate method would be easier then the viewBox method for maps inside user interfaces. Since currentScale/Translate only work on the outmost svg element, the viewBox method seems more appropiate. >no, that cannot work because currentScale/Translate always act on (or >represent the state of) the outermost svg, the root element. the way to >go is to have your main content zoomed as ever you want and apply >inverse transformations (for <g>s) or inverse screenCTMs (for inner ><svg>s) to the parts that are acting as "fixed" interface containers. > > hehe, I'm actually belgian, but followed a german course the last two years, so it will probably be ok :). >because it is tricky. there are samples out there but these are not easy >to break down in a 5-lines sample script. all this is explained in book >coming out feb 2006, but it will be in german first (but you should be >able to read it, judging based on your last name...) here is a short >description <http://www.huethig.de/shop/product.html?id=146899&top=1>, >the companion website will go online jan 2006 at <http://svg.carto.net/> >(may be offline these times). > Could you comment on what you think is the most appropiate/easy way to provide zoom & pan for maps in SVG? I only have experience with the viewBox method. Jeroen Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ------------------------ Yahoo! Groups Sponsor --------------------~--> 1.2 million kids a year are victims of human trafficking. Stop slavery. http://us.click.yahoo.com/.QUssC/izNLAA/TtwFAA/1U_rlB/TM --------------------------------------------------------------------~-> ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
