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#![doc = include_str!("../README.md")]
use fltk::{prelude::*, *};
use notify::{
event::{AccessKind, AccessMode, EventKind},
Event, RecursiveMode, Watcher,
};
use serde_derive::{Deserialize, Serialize};
use std::{
path::{Path, PathBuf},
sync::{
atomic::{AtomicBool, Ordering},
Arc,
},
};
mod utils;
#[derive(Clone, Debug, Serialize, Deserialize)]
struct Widget {
widget: String,
label: Option<String>,
id: Option<String>,
fixed: Option<i32>,
color: Option<String>,
labelcolor: Option<String>,
children: Option<Vec<Widget>>,
hide: Option<bool>,
deactivate: Option<bool>,
visible: Option<bool>,
resizable: Option<bool>,
selectioncolor: Option<String>,
tooltip: Option<String>,
image: Option<String>,
deimage: Option<String>,
labelfont: Option<u32>,
labelsize: Option<i32>,
align: Option<i32>,
when: Option<i32>,
frame: Option<u32>,
downframe: Option<u32>,
shortcut: Option<String>,
pad: Option<i32>,
minimum: Option<f64>,
maximum: Option<f64>,
step: Option<f64>,
slidersize: Option<f64>,
}
#[derive(Debug, Clone)]
pub struct DeclarativeApp {
a: app::App,
w: i32,
h: i32,
label: String,
#[allow(dead_code)]
path: PathBuf,
widget: Option<Widget>,
}
impl DeclarativeApp {
pub fn new<P: AsRef<Path>>(w: i32, h: i32, label: &str, path: P) -> Self {
let json = utils::load(path.as_ref()).expect("Failed to load widget data!");
let a = app::App::default().with_scheme(app::Scheme::Gtk);
Self {
a,
w,
h,
label: label.to_string(),
path: PathBuf::from(path.as_ref()),
widget: Some(json),
}
}
pub fn run<F: FnMut(&mut window::Window) + 'static>(
&self,
hot_reload: bool,
mut run_cb: F,
) -> Result<(), Box<dyn std::error::Error>> {
let mut win = window::Window::default()
.with_size(self.w, self.h)
.with_label(&self.label);
if let Some(widget) = &self.widget {
utils::transform(widget);
}
win.end();
win.show();
if let Some(mut frst) = win.child(0) {
frst.resize(0, 0, win.w(), win.h());
win.resizable(&frst);
}
run_cb(&mut win);
if hot_reload {
let flag = Arc::new(AtomicBool::new(false));
app::add_timeout3(0.1, {
let flag = flag.clone();
let mut win = win.clone();
move |_t| {
if flag.load(Ordering::Relaxed) {
run_cb(&mut win);
flag.store(false, Ordering::Relaxed);
}
app::repeat_timeout3(0.1, _t);
}
});
let path = self.path.clone();
let mut watcher =
notify::recommended_watcher(move |res: Result<Event, notify::Error>| match res {
Ok(event) => {
if let EventKind::Access(AccessKind::Close(mode)) = event.kind {
if mode == AccessMode::Write {
if let Some(wid) = utils::load(&path) {
win.clear();
win.begin();
utils::transform(&wid);
win.end();
if let Some(mut frst) = win.child(0) {
frst.resize(0, 0, win.w(), win.h());
win.resizable(&frst);
}
flag.store(true, Ordering::Relaxed);
}
}
}
}
Err(e) => eprintln!("{}", e),
})?;
watcher.watch(&self.path, RecursiveMode::NonRecursive)?;
}
self.a.run()?;
Ok(())
}
}