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Software Engineering

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  • Is there some reason you can't make use of the previous position of the mouse? Assuming the mouse is already in the valid area, can you evaluate a new position for the mouse and, if not in the area, keep the previous position of the mouse? If position updates are small moves, this should leave the mouse at the edge of the area when attempted to be moved outside it. Commented Nov 22, 2011 at 8:11
  • There are a couple of issues with that: A. the mouse can be moved at very fast rates, if I flick my mouse across the mouse pad as if I were going to jump from the windows start button to the exit button of a window, I can get it to jump something like 200 pixels between position updates. Issue B. I need the user to be able to move the mouse along the edge of the area smoothly, jumping it back to its previous position would keep it in one spot if the user tried to move outwards from the area at an angle (I would want it to move along the edge, but in the direction of that angle.) Commented Nov 22, 2011 at 8:30
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    This is just a quick thought, but how about instead of one static point, you use two static points. You could do a hit test based on if the mouse is closer to one point or the other? That way, instead of being bound by a circle, it would be bound by an oval, and you'd be able to make a better judgment call over where the mouse is bound to. Commented Nov 22, 2011 at 15:52