Initial commit

src/widgets/clock.rs

@@ -0,0 +1,76 @@
+use std::default::Default;
+
+use crate::{
+    buffer::BufferView,
+    color::Color,
+    fonts::FontMap,
+    widgets::{Geometry, Widget},
+};
+
+use chrono::{Local, Timelike};
+
+const CLOCK_FONT: &str = "sans";
+const CLOCK_SIZE: f32 = 96.;
+
+pub struct Clock {
+    dirty: bool,
+    geometry: Geometry,
+    digit_width: u32,
+    colon_width: u32,
+}
+
+impl<'a> Clock {
+    pub fn new() -> Clock {
+        Clock {
+            dirty: true,
+            geometry: Default::default(),
+            digit_width: 0,
+            colon_width: 0,
+        }
+    }
+}
+
+impl<'a> Widget for Clock {
+    fn set_dirty(&mut self, dirty: bool) {
+        self.dirty = dirty;
+    }
+    fn get_dirty(&self) -> bool {
+        self.dirty
+    }
+
+    fn geometry(&self) -> Geometry {
+        self.geometry
+    }
+
+    fn draw(&mut self, fonts: &mut FontMap, view: &mut BufferView) -> Geometry {
+        let time = Local::now().naive_local();
+        let fg = Color::new(1., 1., 1., 1.);
+        let bg = Color::new(0., 0., 0., 1.);
+
+        let digit = self.digit_width;
+        let colon = self.colon_width;
+        let font = fonts.get_font(CLOCK_FONT, CLOCK_SIZE);
+        font.draw_text_fixed_width(
+            view,
+            &bg,
+            &fg,
+            &[digit, digit, colon, digit, digit],
+            &format!("{:02}:{:02}", time.hour(), time.minute()),
+        )
+        .unwrap();
+        self.geometry
+    }
+
+    fn geometry_update(&mut self, fonts: &mut FontMap, geometry: &Geometry) -> Geometry {
+        let font = fonts.get_font(CLOCK_FONT, CLOCK_SIZE);
+        self.digit_width = font.auto_widest("0123456789").unwrap();
+        self.colon_width = font.auto_widest(":").unwrap();
+        self.geometry = Geometry {
+            x: geometry.x,
+            y: geometry.y,
+            width: self.digit_width * 4 + self.colon_width,
+            height: CLOCK_SIZE.ceil() as u32,
+        };
+        self.geometry
+    }
+}