Display control device

A display control device comprising:

• a screen image processing portion that executes a process for transitioning from a screen image displayed on a screen of a display device to another type of screen image;
• an input acceptance portion that accepts a user manipulation input to perform the process executed in the screen image processing portion;
• a queue that stores an event in chronological order to be executed by the screen image processing portion based on the manipulation input accepted by the input acceptance portion;
• an event delivery portion that
• monitors a situation of the process executed by the screen image processing portion,
• delivers the event, which is stored at a beginning of the queue, to the screen image processing portion each time when the screen image processing portion finishes the process, and
• deletes the event, which is delivered to the screen image processing portion, from the queue;
• and
• a sift portion that sifts the transition request event stored in the queue,
• wherein the event includes a transition request event to transition from the screen-image displayed on the screen of the display device to the another type of screen image,
• wherein the screen image processing portion transitions from the screen-image displayed on the display device to the another type of screen image according to the transition request event in response to the event delivery portion delivering the transition request event to the screen image processing portion, and
• wherein, when the queue stores a plurality of transition request events each corresponding to a same type of screen-image after transition, the sift portion retains a newest transition request event of the plurality of the transition request events that was most recently stored in the queue, and discards the other transition request events of the plurality of transition request events that correspond to the same type of screen-image after transition and that were stored in the queue before the newest transition request.