A control device includes: a receiver for receiving first information regarding the movement of a casing, and second information regarding whether to reflect the first information on the movement of coordinate values; a storage unit for storing a whole-screen region including a real-screen region, and a virtual-screen region set around the real-screen region; a generator for generating the coordinate values within the whole-screen region based on the first information; a switcher for switching a first state in which the coordinate values are movable, and a second state in which the coordinate values are immovable, based on the second information; a determining unit for determining which of the real-screen region or the virtual-screen region the coordinate values belong to; and a coordinate-value control unit for controlling the coordinate values so as to move the coordinate values within the virtual-screen region to the position of predetermined coordinate values within the real-screen region.