egui/examples/keyboard_events/src/main.rs
Emil Ernerfeldt 8ce0e1c520
Avoid deadlocks by using lambdas for context lock (#2625)
ctx.input().key_pressed(Key::A) -> ctx.input(|i| i.key_pressed(Key::A))
2023-01-25 10:24:23 +01:00

48 lines
1.5 KiB
Rust

#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
use eframe::egui;
use egui::*;
fn main() -> Result<(), eframe::Error> {
// Log to stdout (if you run with `RUST_LOG=debug`).
tracing_subscriber::fmt::init();
let options = eframe::NativeOptions::default();
eframe::run_native(
"Keyboard events",
options,
Box::new(|_cc| Box::new(Content::default())),
)
}
#[derive(Default)]
struct Content {
text: String,
}
impl eframe::App for Content {
fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
egui::CentralPanel::default().show(ctx, |ui| {
ui.heading("Press/Hold/Release example. Press A to test.");
if ui.button("Clear").clicked() {
self.text.clear();
}
ScrollArea::vertical()
.auto_shrink([false; 2])
.stick_to_bottom(true)
.show(ui, |ui| {
ui.label(&self.text);
});
if ctx.input(|i| i.key_pressed(Key::A)) {
self.text.push_str("\nPressed");
}
if ctx.input(|i| i.key_down(Key::A)) {
self.text.push_str("\nHeld");
ui.ctx().request_repaint(); // make sure we note the holding.
}
if ctx.input(|i| i.key_released(Key::A)) {
self.text.push_str("\nReleased");
}
});
}
}