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