1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
// Take a look at the license at the top of the repository in the LICENSE file.
use crate::AxisUse;
use crate::Device;
use crate::TimeCoord;
use crate::Window;
use glib::object::IsA;
use glib::translate::*;
use std::mem;
use std::ptr;
impl Device {
#[doc(alias = "gdk_device_get_axis")]
#[doc(alias = "get_axis")]
pub fn is_axis(&self, axes: &mut [f64], use_: AxisUse, value: &mut f64) -> bool {
unsafe {
from_glib(ffi::gdk_device_get_axis(
self.to_glib_none().0,
axes.as_mut_ptr(),
use_.into_glib(),
value,
))
}
}
/// 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 [`Window::set_event_compression()`][crate::Window::set_event_compression()] to get
/// more motion events delivered directly, independent of the windowing
/// system.
/// ## `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
///
/// # Returns
///
/// [`true`] if the windowing system supports motion history and
/// at least one event was found.
///
/// ## `events`
///
/// location to store a newly-allocated array of [`TimeCoord`][crate::TimeCoord], or
/// [`None`]
#[doc(alias = "gdk_device_get_history")]
#[doc(alias = "get_history")]
pub fn history<P: IsA<Window>>(&self, window: &P, start: u32, stop: u32) -> Vec<TimeCoord> {
unsafe {
let mut events = ptr::null_mut();
let mut n_events = mem::MaybeUninit::uninit();
let ret: bool = from_glib(ffi::gdk_device_get_history(
self.to_glib_none().0,
window.as_ref().to_glib_none().0,
start,
stop,
&mut events,
n_events.as_mut_ptr(),
));
if !ret {
return Vec::new();
}
let n_events = n_events.assume_init() as usize;
FromGlibContainer::from_glib_full_num(events, n_events)
}
}
}