use gtk::{glib, prelude::*};
use crate::model::WeightChange;
mod imp {
use crate::model::WeightChange;
use adw::{prelude::*, subclass::prelude::*};
use gtk::glib;
use std::{cell::Cell, str::FromStr};
#[derive(Debug, Default)]
pub struct Arrows {
pub weight_change: Cell<WeightChange>,
}
#[glib::object_subclass]
impl ObjectSubclass for Arrows {
const NAME: &'static str = "HealthArrows";
type ParentType = adw::Bin;
type Type = super::Arrows;
}
impl ObjectImpl for Arrows {
fn properties() -> &'static [glib::ParamSpec] {
use once_cell::sync::Lazy;
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
vec![glib::ParamSpecString::builder("weight-change")
.default_value(Some("no_change"))
.construct()
.readwrite()
.build()]
});
PROPERTIES.as_ref()
}
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
let obj = self.obj();
match pspec.name() {
"weight-change" => {
self.weight_change
.set(WeightChange::from_str(value.get::<&str>().unwrap()).unwrap());
obj.queue_draw();
}
_ => unimplemented!(),
}
}
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
match pspec.name() {
"weight-change" => self.weight_change.get().to_value(),
_ => unimplemented!(),
}
}
}
impl WidgetImpl for Arrows {
fn snapshot(&self, snapshot: >k::Snapshot) {
let widget = self.obj();
let cr = snapshot.append_cairo(>k::graphene::Rect::new(
0.0,
0.0,
widget.width() as f32,
widget.height() as f32,
));
let width = f64::from(widget.width());
let height = f64::from(widget.height());
let weight_change = self.weight_change.get();
cr.set_line_width(2.5);
let style_context = widget.style_context();
let shaded = style_context.lookup_color("blue").unwrap();
GdkCairoContextExt::set_source_rgba(&cr, &shaded);
let (arrowhead_position, arrowhead_size) = match weight_change {
WeightChange::Down => (height * 0.85, -width / 12.0_f64),
WeightChange::Up => (height * 0.1, width / 12.0_f64),
WeightChange::NoChange => (width * 0.9, -width / 12.0_f64),
};
match weight_change {
WeightChange::Down | WeightChange::Up => {
cr.move_to(width / 2.0, height * 0.1);
cr.line_to(width / 2.0, height * 0.85);
cr.move_to(width / 2.0, arrowhead_position);
cr.line_to(
width / 2.0 - arrowhead_size,
arrowhead_position + arrowhead_size,
);
cr.move_to(width / 2.0, arrowhead_position);
cr.line_to(
width / 2.0 + arrowhead_size,
arrowhead_position + arrowhead_size,
);
}
WeightChange::NoChange => {
cr.move_to(width - width * 0.85, height / 2.0);
cr.line_to(width - width * 0.1, height / 2.0);
cr.move_to(arrowhead_position, height / 2.0);
cr.line_to(
arrowhead_size + arrowhead_position,
height / 2.0 - arrowhead_size,
);
cr.move_to(arrowhead_position, height / 2.0);
cr.line_to(
arrowhead_position + arrowhead_size,
height / 2.0 + arrowhead_size,
);
}
}
cr.stroke().expect("Couldn't stroke on Cairo Context");
cr.save().unwrap();
}
}
impl BinImpl for Arrows {}
}
glib::wrapper! {
pub struct Arrows(ObjectSubclass<imp::Arrows>)
@extends gtk::Widget, adw::Bin,
@implements gtk::Accessible, gtk::Buildable, gtk::ConstraintTarget;
}
impl Arrows {
pub fn new() -> Self {
glib::Object::new()
}
pub fn set_weight_change(&self, change: WeightChange) {
self.set_property("weight-change", &change)
}
}
#[cfg(test)]
mod test {
use super::Arrows;
use crate::utils::init_gtk;
#[gtk::test]
fn new() {
init_gtk();
Arrows::new();
}
}