parent
d2bfe56293
commit
d6152c02e9
@ -1,161 +0,0 @@
|
||||
use crate::ui::{
|
||||
component::{Component, Event, EventCtx},
|
||||
display,
|
||||
event::TouchEvent,
|
||||
geometry::{Point, Rect},
|
||||
shape::Renderer,
|
||||
};
|
||||
|
||||
use super::theme;
|
||||
|
||||
pub use crate::ui::component::SwipeDirection;
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct Swipe {
|
||||
pub area: Rect,
|
||||
pub allow_up: bool,
|
||||
pub allow_down: bool,
|
||||
pub allow_left: bool,
|
||||
pub allow_right: bool,
|
||||
backlight_start: u16,
|
||||
backlight_end: u16,
|
||||
origin: Option<Point>,
|
||||
}
|
||||
|
||||
impl Swipe {
|
||||
const DISTANCE: i32 = 120;
|
||||
const THRESHOLD: f32 = 0.3;
|
||||
|
||||
pub fn new() -> Self {
|
||||
Self {
|
||||
area: Rect::zero(),
|
||||
allow_up: false,
|
||||
allow_down: false,
|
||||
allow_left: false,
|
||||
allow_right: false,
|
||||
backlight_start: theme::BACKLIGHT_NORMAL,
|
||||
backlight_end: theme::BACKLIGHT_NONE,
|
||||
origin: None,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn vertical() -> Self {
|
||||
Self::new().up().down()
|
||||
}
|
||||
|
||||
pub fn horizontal() -> Self {
|
||||
Self::new().left().right()
|
||||
}
|
||||
|
||||
pub fn up(mut self) -> Self {
|
||||
self.allow_up = true;
|
||||
self
|
||||
}
|
||||
|
||||
pub fn down(mut self) -> Self {
|
||||
self.allow_down = true;
|
||||
self
|
||||
}
|
||||
|
||||
pub fn left(mut self) -> Self {
|
||||
self.allow_left = true;
|
||||
self
|
||||
}
|
||||
|
||||
pub fn right(mut self) -> Self {
|
||||
self.allow_right = true;
|
||||
self
|
||||
}
|
||||
|
||||
fn is_active(&self) -> bool {
|
||||
self.allow_up || self.allow_down || self.allow_left || self.allow_right
|
||||
}
|
||||
|
||||
fn ratio(&self, dist: i16) -> f32 {
|
||||
(dist as f32 / Self::DISTANCE as f32).min(1.0)
|
||||
}
|
||||
|
||||
fn backlight(&self, ratio: f32) {
|
||||
let start = self.backlight_start as f32;
|
||||
let end = self.backlight_end as f32;
|
||||
let value = start + ratio * (end - start);
|
||||
display::set_backlight(value as u16);
|
||||
}
|
||||
}
|
||||
|
||||
impl Component for Swipe {
|
||||
type Msg = SwipeDirection;
|
||||
|
||||
fn place(&mut self, bounds: Rect) -> Rect {
|
||||
self.area = bounds;
|
||||
self.area
|
||||
}
|
||||
|
||||
fn event(&mut self, _ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
|
||||
if !self.is_active() {
|
||||
return None;
|
||||
}
|
||||
match (event, self.origin) {
|
||||
(Event::Touch(TouchEvent::TouchStart(pos)), _) if self.area.contains(pos) => {
|
||||
// Mark the starting position of this touch.
|
||||
self.origin.replace(pos);
|
||||
}
|
||||
(Event::Touch(TouchEvent::TouchMove(pos)), Some(origin)) => {
|
||||
// Consider our allowed directions and the touch distance and modify the display
|
||||
// backlight accordingly.
|
||||
let ofs = pos - origin;
|
||||
let abs = ofs.abs();
|
||||
if abs.x > abs.y && (self.allow_left || self.allow_right) {
|
||||
// Horizontal direction.
|
||||
if (ofs.x < 0 && self.allow_left) || (ofs.x > 0 && self.allow_right) {
|
||||
self.backlight(self.ratio(abs.x));
|
||||
}
|
||||
} else if abs.x < abs.y && (self.allow_up || self.allow_down) {
|
||||
// Vertical direction.
|
||||
if (ofs.y < 0 && self.allow_up) || (ofs.y > 0 && self.allow_down) {
|
||||
self.backlight(self.ratio(abs.y));
|
||||
}
|
||||
};
|
||||
}
|
||||
(Event::Touch(TouchEvent::TouchEnd(pos)), Some(origin)) => {
|
||||
// Touch interaction is over, reset the position.
|
||||
self.origin.take();
|
||||
|
||||
// Compare the touch distance with our allowed directions and determine if it
|
||||
// constitutes a valid swipe.
|
||||
let ofs = pos - origin;
|
||||
let abs = ofs.abs();
|
||||
if abs.x > abs.y && (self.allow_left || self.allow_right) {
|
||||
// Horizontal direction.
|
||||
if self.ratio(abs.x) >= Self::THRESHOLD {
|
||||
if ofs.x < 0 && self.allow_left {
|
||||
return Some(SwipeDirection::Left);
|
||||
} else if ofs.x > 0 && self.allow_right {
|
||||
return Some(SwipeDirection::Right);
|
||||
}
|
||||
}
|
||||
} else if abs.x < abs.y && (self.allow_up || self.allow_down) {
|
||||
// Vertical direction.
|
||||
if self.ratio(abs.y) >= Self::THRESHOLD {
|
||||
if ofs.y < 0 && self.allow_up {
|
||||
return Some(SwipeDirection::Up);
|
||||
} else if ofs.y > 0 && self.allow_down {
|
||||
return Some(SwipeDirection::Down);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// Swipe did not happen, reset the backlight.
|
||||
self.backlight(0.0);
|
||||
}
|
||||
_ => {
|
||||
// Do nothing.
|
||||
}
|
||||
}
|
||||
None
|
||||
}
|
||||
|
||||
fn paint(&mut self) {}
|
||||
|
||||
fn render<'s>(&'s self, _target: &mut impl Renderer<'s>) {}
|
||||
}
|
Loading…
Reference in new issue