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wayland: implement wl_seat v8

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This commit is contained in:
Julian Orth 2022-05-27 15:39:48 +02:00
parent 145e4dbc24
commit 50c87d6da7
10 changed files with 111 additions and 80 deletions
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44
src/utils/scroller.rs
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@ -1,27 +1,45 @@
use {
crate::ifs::wl_seat::{
wl_pointer::{PendingScroll, VERTICAL_SCROLL},
PX_PER_SCROLL,
crate::{
backend::AXIS_120,
ifs::wl_seat::{
wl_pointer::{PendingScroll, VERTICAL_SCROLL},
PX_PER_SCROLL,
},
},
std::cell::Cell,
};
#[derive(Default)]
pub struct Scroller {
scroll: Cell<f64>,
v120: Cell<i32>,
smooth: Cell<f64>,
}
impl Scroller {
pub fn handle(&self, scroll: &PendingScroll) -> Option<i32> {
if let Some(d) = scroll.discrete[VERTICAL_SCROLL as usize].get() {
self.scroll.set(0.0);
Some(d)
} else if let Some(scroll) = scroll.axis[VERTICAL_SCROLL as usize].get() {
let mut scroll = self.scroll.get() + scroll.to_f64();
let discrete = (scroll / PX_PER_SCROLL).trunc();
scroll -= discrete * PX_PER_SCROLL;
self.scroll.set(scroll);
Some(discrete as i32)
let n = if let Some(d) = scroll.v120[VERTICAL_SCROLL as usize].get() {
self.smooth.set(0.0);
let mut v120 = self.v120.get() + d;
let discrete = v120 / AXIS_120;
v120 -= discrete * AXIS_120;
self.v120.set(v120);
discrete
} else if let Some(smooth) = scroll.smooth[VERTICAL_SCROLL as usize].get() {
self.v120.set(0);
let mut smooth = self.smooth.get() + smooth.to_f64();
let discrete = (smooth / PX_PER_SCROLL).trunc();
smooth -= discrete * PX_PER_SCROLL;
self.smooth.set(smooth);
discrete as _
} else {
0
};
if scroll.stop[VERTICAL_SCROLL as usize].get() {
self.v120.set(0);
self.smooth.set(0.0);
}
if n != 0 {
Some(n)
} else {
None
}