controlActivity

Pass control to a subView corresponding to a pressed keyboard key or to
a mouse button pressed, if any.

isControlActive

Answer false if the blue mouse button is pressed and the cursor is
outside of the inset display box of the Controller's view; answer true,
otherwise.

isControlWanted

Answer true if the cursor is inside the inset display box (see
View|insetDisplayBox) of the receiver's view, and answer false,
otherwise. It is sent by Controller|controlNextLevel in order to determine
whether or not control should be passed to this receiver from the
Controller of the superView of this receiver's view.

processMenuKey

The user typed a key on the keyboard. Perform the action of the button whose shortcut is that key, if any.