gdk-event, common-lisp:structure-object, common-lisp:t

None

Generated from button presses for the buttons 4 to 7. Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.

Some GDK backends can also generate 'smooth' scroll events, which can be recognized by the :smooth direction. For these, the scroll deltas can be obtained with the gdk-event-scroll-deltas function.

(define-g-boxed-variant-cstruct gdk-event "GdkEvent"
  (type gdk-event-type)
  (window (g-object gdk-window))
  (send-event (:boolean :int8))
  (:variant type
            ...
            ((:scroll) gdk-event-scroll
             (time :uint32)
             (x :double)
             (y :double)
             (state gdk-modifier-type)
             (direction gdk-scroll-direction)
             (device (g-object gdk-device))
             (x-root :double)
             (y-root :double)
             (delta-x :double)
             (delta-y :double))
  ... ))  

type

The gdk-event-type type of the scroll event.

window

The gdk-window object which received the event.

send-event

True if the event was sent explicitly.

time

An unsigned integer with the time of the event in milliseconds.

x

The double float x coordinate of the pointer relative to the window.

y

The double float y coordinate of the pointer relative to the window.

state

The gdk-modifier-type bit-mask representing the state of the modifier keys, e.g. the Control, Shift and Alt keys, and the pointer buttons.

direction

The gdk-scroll-direction direction to scroll to, one of the :up, :down, :left, :right or :smooth values.

device

The gdk-device object where the event originated.

x-root

The double float x coordinate of the pointer relative to the root of the screen.

y-root

The double float y coordinate of the pointer relative to the root of the screen.

delta-x

The double float x coordinate of the scroll delta.

delta-y

The double float y coordinate of the scroll delta.