RGtk2: gdkDeviceGetHistory – R documentation

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gdkDeviceGetHistory

Description

Obtains the motion history for a 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.)

Usage

gdkDeviceGetHistory(object, window, start, stop)

Arguments

`object`	a `GdkDevice`
`window`	the window with respect to which which the event coordinates will be reported
`start`	starting timestamp for range of events to return
`stop`	ending timestamp for the range of events to return

Value

A list containing the following elements:

`retval`	[logical] `TRUE` if the windowing system supports motion history and at least one event was found.
`events`	location to store a newly-allocated list of `GdkTimeCoord`, or `NULL`. [ array length=n_events][ out ][ transfer none ]
`n.events`	location to store the length of `events`, or `NULL`

Author(s)

Derived by RGtkGen from GTK+ documentation

RGtk2

R Bindings for Gtk 2.8.0 and Above

v2.20.36

GPL

Authors

Michael Lawrence <michafla@gene.com> and Duncan Temple Lang <duncan@wald.ucdavis.edu>

Initial release