feat(eckhart): set brightness screen

core/embed/rust/src/ui/layout_eckhart/component_msg_obj.rs

@@ -17,7 +17,7 @@ use super::firmware::{
     AllowedTextContent, ConfirmHomescreen, ConfirmHomescreenMsg, Homescreen, HomescreenMsg,
     MnemonicInput, MnemonicKeyboard, MnemonicKeyboardMsg, NumberInputScreen, NumberInputScreenMsg,
     PinKeyboard, PinKeyboardMsg, SelectWordCountMsg, SelectWordCountScreen, SelectWordMsg,
-    SelectWordScreen, TextScreen, TextScreenMsg,
+    SelectWordScreen, SetBrightnessMsg, SetBrightnessScreen, TextScreen, TextScreenMsg,
 };
 
 impl ComponentMsgObj for PinKeyboard<'_> {
@@ -128,3 +128,12 @@ impl ComponentMsgObj for ConfirmHomescreen {
         }
     }
 }
+
+impl ComponentMsgObj for SetBrightnessScreen {
+    fn msg_try_into_obj(&self, msg: Self::Msg) -> Result<Obj, Error> {
+        match msg {
+            SetBrightnessMsg::Confirmed => Ok(CONFIRMED.as_obj()),
+            SetBrightnessMsg::Cancelled => Ok(CANCELLED.as_obj()),
+        }
+    }
+}

core/embed/rust/src/ui/layout_eckhart/firmware/brightness_screen.rs

@@ -0,0 +1,216 @@
+use crate::{
+    storage,
+    translations::TR,
+    trezorhal::display,
+    ui::{
+        component::{Component, Event, EventCtx},
+        event::TouchEvent,
+        geometry::{Alignment2D, Insets, Offset, Point, Rect},
+        shape::{Bar, Renderer},
+    },
+};
+
+use super::super::{
+    constant::SCREEN,
+    firmware::{Header, HeaderMsg},
+    theme,
+};
+
+pub struct SetBrightnessScreen {
+    header: Header,
+    slider: VerticalSlider,
+}
+
+pub enum SetBrightnessMsg {
+    Confirmed,
+    Cancelled,
+}
+
+impl SetBrightnessScreen {
+    const SLIDER_HEIGHT: i16 = 392;
+    pub fn new(min: u16, max: u16, init_value: u16) -> Self {
+        Self {
+            header: Header::new(TR::brightness__title.into()).with_close_button(),
+            slider: VerticalSlider::new(min, max, init_value),
+        }
+    }
+}
+
+impl Component for SetBrightnessScreen {
+    type Msg = SetBrightnessMsg;
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        // assert full screen
+        debug_assert_eq!(bounds.height(), SCREEN.height());
+        debug_assert_eq!(bounds.width(), SCREEN.width());
+
+        let (header_area, rest) = bounds.split_top(Header::HEADER_HEIGHT);
+        let (slider_area, _) = rest.split_top(Self::SLIDER_HEIGHT);
+
+        self.header.place(header_area);
+        self.slider.place(slider_area);
+
+        bounds
+    }
+
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        if let Some(HeaderMsg::Cancelled) = self.header.event(ctx, event) {
+            return Some(SetBrightnessMsg::Cancelled);
+        }
+
+        if let Some(value) = self.slider.event(ctx, event) {
+            unwrap!(storage::set_brightness(value as _));
+            return Some(SetBrightnessMsg::Confirmed);
+        }
+        None
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        self.header.render(target);
+        self.slider.render(target);
+    }
+}
+
+#[cfg(feature = "ui_debug")]
+impl crate::trace::Trace for SetBrightnessScreen {
+    fn trace(&self, t: &mut dyn crate::trace::Tracer) {
+        t.component("SetBrightnessScreen");
+        t.child("Header", &self.header);
+        t.child("Slider", &self.slider);
+    }
+}
+
+struct VerticalSlider {
+    area: Rect,
+    touch_area: Rect,
+    min: u16,
+    max: u16,
+    value: u16,
+    val_pct: u16,
+    touching: bool,
+}
+
+impl VerticalSlider {
+    const SLIDER_WIDTH: i16 = 120;
+
+    pub fn new(min: u16, max: u16, value: u16) -> Self {
+        debug_assert!(min < max);
+        let value = value.clamp(min, max);
+        Self {
+            area: Rect::zero(),
+            touch_area: Rect::zero(),
+            min,
+            max,
+            value,
+            val_pct: 0,
+            touching: false,
+        }
+    }
+
+    pub fn update_value(&mut self, pos: Point, ctx: &mut EventCtx) {
+        // Area where slider value is not saturated
+        let proportional_area = self.area.inset(Insets::new(
+            Self::SLIDER_WIDTH / 2,
+            0,
+            Self::SLIDER_WIDTH / 2,
+            0,
+        ));
+
+        let filled = (proportional_area.y1 - pos.y).clamp(0, proportional_area.height());
+        let val_pct = (filled as u16 * 100) / proportional_area.height() as u16;
+        let val = (val_pct * (self.max - self.min)) / 100 + self.min;
+
+        if val != self.value {
+            ctx.request_paint();
+            self.value = val;
+        }
+    }
+}
+
+impl Component for VerticalSlider {
+    type Msg = u8;
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        self.area = Rect::snap(
+            bounds.center(),
+            Offset::new(Self::SLIDER_WIDTH, bounds.height()),
+            Alignment2D::CENTER,
+        );
+        self.touch_area = self.area.outset(Insets::uniform(20));
+        bounds
+    }
+
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        if let Event::Touch(touch_event) = event {
+            match touch_event {
+                TouchEvent::TouchStart(pos) if self.touch_area.contains(pos) => {
+                    // Detect only touches inside the touch area
+                    self.touching = true;
+                    self.update_value(pos, ctx);
+                    display::backlight(self.value as _);
+                    ctx.request_paint();
+                }
+                TouchEvent::TouchMove(pos) if self.touching => {
+                    self.update_value(pos, ctx);
+                    // Update only if the touch started inside the touch area
+                    display::backlight(self.value as _);
+                }
+                TouchEvent::TouchEnd(pos) if self.touching => {
+                    self.touching = false;
+                    self.update_value(pos, ctx);
+                    ctx.request_paint();
+                    // Confirm the value only if the touch ended inside the touch area
+                    if self.touch_area.contains(pos) {
+                        return Some(self.value as _);
+                    } else {
+                        display::backlight(self.value as _);
+                    }
+                }
+                _ => {}
+            };
+        }
+        None
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        let val_pct = ((100 * (self.value - self.min)) / (self.max - self.min)).clamp(0, 100);
+
+        // Square area for the slider
+        let (_, small_area) = self.area.split_bottom(Self::SLIDER_WIDTH);
+
+        // Background pad
+        Bar::new(self.area)
+            .with_radius(12)
+            .with_bg(theme::GREY_EXTRA_DARK)
+            .render(target);
+
+        // Moving slider
+        Bar::new(small_area.translate(
+            Offset::y(val_pct as i16 * (self.area.height() - Self::SLIDER_WIDTH) / 100).neg(),
+        ))
+        .with_radius(4)
+        .with_bg(theme::GREY_LIGHT)
+        .render(target);
+    }
+}
+
+#[cfg(feature = "ui_debug")]
+impl crate::trace::Trace for VerticalSlider {
+    fn trace(&self, t: &mut dyn crate::trace::Tracer) {
+        t.component("VerticalSlider");
+        t.int("value", self.value as i64);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{super::super::constant::SCREEN, *};
+
+    #[test]
+    fn test_component_heights_fit_screen() {
+        assert!(
+            SetBrightnessScreen::SLIDER_HEIGHT + Header::HEADER_HEIGHT <= SCREEN.height(),
+            "Components overflow the screen height",
+        );
+    }
+}

core/embed/rust/src/ui/layout_eckhart/firmware/mod.rs

@@ -1,4 +1,5 @@
 mod action_bar;
+mod brightness_screen;
 mod confirm_homescreen;
 mod header;
 mod hint;
@@ -14,6 +15,7 @@ mod vertical_menu;
 mod vertical_menu_screen;
 
 pub use action_bar::{ActionBar, ActionBarMsg};
+pub use brightness_screen::{SetBrightnessMsg, SetBrightnessScreen};
 pub use confirm_homescreen::{ConfirmHomescreen, ConfirmHomescreenMsg};
 pub use header::{Header, HeaderMsg};
 pub use hint::Hint;

core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs

@@ -34,7 +34,7 @@ use super::{
     firmware::{
         ActionBar, Bip39Input, ConfirmHomescreen, Header, HeaderMsg, Hint, Homescreen,
         MnemonicKeyboard, NumberInputScreen, PinKeyboard, SelectWordCountScreen, SelectWordScreen,
-        Slip39Input, TextScreen,
+        SetBrightnessScreen, Slip39Input, TextScreen,
     },
     flow, fonts, theme, UIEckhart,
 };
@@ -648,8 +648,14 @@ impl FirmwareUI for UIEckhart {
         Ok(layout)
     }
 
-    fn set_brightness(_current_brightness: Option<u8>) -> Result<impl LayoutMaybeTrace, Error> {
-        Err::<RootComponent<Empty, ModelUI>, Error>(Error::ValueError(c"not implemented"))
+    fn set_brightness(current_brightness: Option<u8>) -> Result<impl LayoutMaybeTrace, Error> {
+        let content = SetBrightnessScreen::new(
+            theme::backlight::get_backlight_min() as u16,
+            theme::backlight::get_backlight_max() as u16,
+            current_brightness.unwrap_or(theme::backlight::get_backlight_normal()) as u16,
+        );
+        let layout = RootComponent::new(content);
+        Ok(layout)
     }
 
     fn show_address_details(