Method
GdkDeviceget_history
Declaration [src]
gboolean
gdk_device_get_history (
GdkDevice* device,
GdkWindow* window,
guint32 start,
guint32 stop,
GdkTimeCoord*** events,
gint* n_events
)
Description [src]
Obtains the motion history for a pointer device; given a starting and
ending timestamp, return all events in the motion history for
the device in the given range of time. Some windowing systems
do not support motion history, in which case, FALSE will
be returned. (This is not distinguishable from the case where
motion history is supported and no events were found.)
Note that there is also gdk_window_set_event_compression() to get
more motion events delivered directly, independent of the windowing system.
This method is not directly available to language bindings.
Parameters
window-
Type:
GdkWindowThe window with respect to which which the event coordinates will be reported.
The data is owned by the caller of the method. start-
Type:
guint32Starting timestamp for range of events to return.
stop-
Type:
guint32Ending timestamp for the range of events to return.
events-
Type: An array of
GdkTimeCoord**location to store a newly-allocated array of
GdkTimeCoord, orNULL.The argument will be set by the function. The argument can be NULL.The length of the array is specified in the n_eventsargument.The caller of the method takes ownership of the returned data, and is responsible for freeing it. n_events-
Type:
gint*Location to store the length of
events, orNULL.The argument will be set by the function. The argument can be NULL.