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Improve the API of the pie chart

This commit is contained in:
Savanni D'Gerinel 2023-08-09 11:03:08 -04:00
parent 6fb7749642
commit 0078f1db27
2 changed files with 20 additions and 22 deletions
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36
dashboard/src/drawing/pie_chart.rs
View File

@ -1,4 +1,4 @@
use cairo::{Context, Format, ImageSurface}; use cairo::Context;
use std::f64::consts::PI; use std::f64::consts::PI;
#[derive(Clone, Debug)] #[derive(Clone, Debug)]
@ -18,8 +18,9 @@ pub struct Wedge {
pub struct PieChart { pub struct PieChart {
rotation: f64, rotation: f64,
wedges: Vec<Wedge>, wedges: Vec<Wedge>,
width: i32, center_x: f64,
height: i32, center_y: f64,
radius: f64,
} }
impl PieChart { impl PieChart {
@ -27,8 +28,9 @@ impl PieChart {
Self { Self {
rotation: 0., rotation: 0.,
wedges: vec![], wedges: vec![],
width: 0, center_x: 0.,
height: 0, center_y: 0.,
radius: 0.,
} }
} }
@ -43,22 +45,18 @@ impl PieChart {
self self
} }
pub fn width(mut self, width: i32) -> Self { pub fn center(mut self, center_x: f64, center_y: f64) -> Self {
self.width = width; self.center_x = center_x;
self.center_y = center_y;
self self
} }
pub fn height(mut self, height: i32) -> Self { pub fn radius(mut self, radius: f64) -> Self {
self.height = height; self.radius = radius;
self self
} }
pub fn draw(self, context: &Context) { pub fn draw(self, context: &Context) {
println!("drawing: {} {}", self.width, self.height);
let radius = self.width.min(self.height) as f64 / 2.;
let center_x = (self.width / 2) as f64;
let center_y = (self.height / 2) as f64;
context.set_source_rgba(0., 0., 0., 0.); context.set_source_rgba(0., 0., 0., 0.);
let _ = context.paint(); let _ = context.paint();
@ -80,12 +78,12 @@ impl PieChart {
end_angle + self.rotation, end_angle + self.rotation,
self.rotation self.rotation
); );
context.move_to(center_x, center_y); context.move_to(self.center_x, self.center_y);
context.set_source_rgb(color.r, color.g, color.b); context.set_source_rgb(color.r, color.g, color.b);
context.arc( context.arc(
center_x, self.center_x,
center_y, self.center_y,
radius, self.radius,
start_angle + self.rotation, start_angle + self.rotation,
end_angle + self.rotation, end_angle + self.rotation,
); );
@ -94,7 +92,7 @@ impl PieChart {
); );
context.set_source_rgb(1., 1., 1.); context.set_source_rgb(1., 1., 1.);
context.arc(center_x, center_y, radius, 0., 2. * PI); context.arc(self.center_x, self.center_y, self.radius, 0., 2. * PI);
let _ = context.stroke(); let _ = context.stroke();
} }
} }

6
dashboard/src/main.rs
View File

@ -259,8 +259,8 @@ impl TransitClock {
let sunset = info.sunset - NaiveTime::from_hms_opt(0, 0, 0).unwrap(); let sunset = info.sunset - NaiveTime::from_hms_opt(0, 0, 0).unwrap();
PieChart::new() PieChart::new()
.width(width) .center(center_x, center_y)
.height(height) .radius(radius)
.rotation(-PI / 2.) .rotation(-PI / 2.)
.wedges( .wedges(
vec![Wedge { vec![Wedge {
@ -280,7 +280,7 @@ impl TransitClock {
context.set_source_rgb(0., 0., 0.); context.set_source_rgb(0., 0., 0.);
context.translate(center_x, center_y); context.translate(center_x, center_y);
context.rotate(tick as f64 * (PI / 12.)); context.rotate(tick as f64 * (PI / 12.));
context.move_to(radius, 0.); context.move_to(radius - 5., 0.);
context.line_to(radius - 10., 0.); context.line_to(radius - 10., 0.);
let _ = context.stroke(); let _ = context.stroke();
context.identity_matrix(); context.identity_matrix();