Hi, Frankly, I don't know. I have never written an application for PalmOS which needed such techniques so haven't looked into the area.
My point is that you will have to interpret the stylus taps/strokes and then run the software to do the panning, whether that is by: a) drawing a new area of the map on the screen b) copying the bitmap for the new area from an offscreen bitmap c) changing the start of screen pointer to a new area in memory. Your best bet would be to search for open source PalmOS mapping projects which allow pan and zoom of vector graphics or bitmaps. If you find any please let me know as I have a passing interest in the area. Personally I would put the panning problem to one side. For now just assume you will completely redraw the screen for each map movement. A far more important consideration is how you are going to store the vast amount of data you need in such a fashion that panning and zooming is possible. TomTom seem to require approximately a gigabyte for a fairly comprehensive street map of western Europe. Regards, On 15/01/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > im sorry but i dont get what you mean by: > > "and then implement your own software to pan etc." > > i've read about off screen windows? is it not the possible to display an > image bigger than the screen itself and then the rest of the image will be > displayed in the offscreen window .. so that when you want to scroll the > image left to right v.v. you will be able to do so? > > thanks! > -- > For information on using the PalmSource Developer Forums, or to > unsubscribe, please see http://www.palmos.com/dev/support/forums/ > -- For information on using the PalmSource Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
