Old "intuitive map manipulation" proof of concept program

This is a simple test program I wrote in 2004 to try out an idea I had for the intuitive manupulation of a map (this particular map is from an old D&D adventure).

The concept was that the user grabs any point of the map with the mouse and drags it around, which results in the image being rotated and scaled seamlessly. Little did I know that a few years later the same concept would become ubiquitous in multitouch display devices (it's like a pinch gesture with one finger always stuck in the middle :).

I don't claim to be the first to have thought this, but I definitely never seen it anywhere before this idea occured to me and I wrote this little proof of concept program. ... https://www.youtube.com/watch?v=lQP1BXMqBQM