- event-type->int event-typeprocedure
event-type may be one of the following symbols:
- joystick-axis
- joystick-button-down
- joystick-button-up
- joystick-configuration
- key-down
- key-char
- key-up
- mouse-axes
- mouse-button-down
- mouse-button-up
- mouse-enter-display
- mouse-leave-display
- mouse-warped
- timer
- display-expose
- display-resize
- display-close
- display-lost
- display-found
- display-switch-in
- display-switch-out
- display-orientation
- audio-stream-fragment
- audio-stream-finished