My problem is this: In my GUI I have a topographical map which is
created by reading data from a 10 meg USGS elevation file, and
simply painting the appropriate pixel color on the screen. The
problem is that now when I move something like an image of an
aircraft over the map, the pixels of the map are obviously erased.
Also, the scope of the map is slighlty larger than the area of
the map that is viewable in my GUI. I think If I read the data
into a pixmap first, and then show the pixmap I can keep track
of the pixels that the plane is over and redraw them, and also
have a scrollable view area. However, I'm not sure how to do it.
Any help in pointing me in the right direction to learn about
creating a pixmap on the fly, and doing things like scrollbars
would be greatly appricieted.
- Andy Messier
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