How do I contain an object within bounds of another object?

I want to be able to contain an object (ball, i.e. circle) within bounds of another object (environment, i.e. larger rectangle) and be able to rotate the rect object...

Imagine a circle (ball) inside a long rectangle... I want to ability to rotate the rectangle and have the ball stay in place (according to its placement within the rect) and not be able to move outside the bounds of the rect. But the ball can move around within the rect with user input (i.e. 8-directional behavior).

I haven't tried it, but you can make the border of the box solid. (Add an invisible solid rectangular sprites to each side, pin everything together)

When there is no user input, pin the ball to the box. When user presses a key to move the ball, unpin it and let the 8-behavior take care of it.

Creative solution (I'll give it a whirl!) - Thank You dop2000!