GBoxed event-touch - cl-cffi-gtk3 API documentation

Package: gdk

GBoxed gdk:event-touch

Declaration

(define-gboxed-variant-cstruct event "GdkEvent"
  (type event-type)
  (window (g:object window))
  (send-event (:boolean :int8))
  (:variant type
            ...
            ((:touch-begin
              :touch-update
              :touch-end
              :touch-cancel) event-touch
             (time :uint32)
             (x :double)
             (y :double)
             (axes (fixed-array :double 2))
             (state modifier-type)
             (sequence (g:boxed event-sequence))
             (emulating-pointer :boolean)
             (device (g:object device))
             (x-root :double)
             (y-root :double))
  ... ))

Values

type: The gdk:event-type type of the event, one of the :touch-begin, :touch-update, :touch-end, :touch-cancel values.
window: The gdk:window object which received the event.
send-event: True if the event was sent explicitly.
time: The unsigned integer for 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.
axes: The x, y fields translated to the axes of the device.
state: The gdk:modifier-type bit-mask representing the state of the modifier keys, for example, the Control, Shift and Alt keys, and the pointer buttons.
sequence: The gdk:event-sequence event sequence that the event belongs to.
emulating-pointer: Whether the event should be used for emulating pointer event.
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.

Details

Used for touch events. The type field will be one of the :touch-begin, :touch-update, :touch-end or :touch-cancel values.

Touch events are grouped into sequences by means of the sequence field, which can also be obtained with the gdk:event-event-sequence function. Each sequence begins with a :touch-begin event, followed by any number of :touch-update events, and ends with a :touch-end event or :touch-cancel event. With multitouch devices, there may be several active sequences at the same time.