Crates.io | fltk-evented |
lib.rs | fltk-evented |
version | 0.5.3 |
source | src |
created_at | 2021-10-25 17:36:35.762697 |
updated_at | 2024-11-02 18:31:19.472871 |
description | Listener widgets for fltk-rs |
homepage | |
repository | https://github.com/fltk-rs/fltk-evented |
max_upload_size | |
id | 471095 |
size | 53,157 |
This crate provides Listener widgets both for sync and async
which can basically wrap any fltk-rs widget (implementing WidgetBase and WidgetExt)
and provides methods triggered() -> bool
and event() -> Event
to handle events in the event loop, without requiring callbacks.
It also provides on_<event>(callback)
methods which simplify handling events whereas you would've had to use the widget's handle method directly.
[dependencies]
fltk = "1.4"
fltk-evented = "0.5"
use fltk::{app, button::Button, frame::Frame, group::Flex, prelude::*, window::Window};
use fltk_evented::Listener;
fn main() {
let a = app::App::default().with_scheme(app::Scheme::Gtk);
app::set_font_size(20);
let mut count = 0;
let mut wind = Window::default()
.with_size(160, 200)
.with_label("Counter");
let flex = Flex::default()
.with_size(120, 160)
.center_of_parent()
.column();
let but_inc: Listener<_> = Button::default().with_label("+").into();
let mut frame = Frame::default().with_label(&count.to_string());
let but_dec: Listener<_> = Button::default().with_label("-").into();
flex.end();
wind.end();
wind.show();
while a.wait() {
if fltk_evented::event() {
if but_inc.triggered() {
count += 1;
}
if but_dec.triggered() {
count -= 1;
}
frame.set_label(&count.to_string());
}
}
}
use fltk::{
app,
button::Button,
enums::{Color, Event},
frame::Frame,
group::Flex,
prelude::*,
window::Window,
};
use fltk_evented::Listener;
fn main() {
let a = app::App::default().with_scheme(app::Scheme::Gtk);
app::set_font_size(20);
let mut count = 0;
let mut wind = Window::default()
.with_size(160, 200)
.with_label("Counter");
let flex = Flex::default()
.with_size(120, 160)
.center_of_parent()
.column();
let mut but_inc: Listener<_> = Button::default().with_label("+").into();
let mut frame = Frame::default().with_label(&count.to_string());
let mut but_dec: Listener<_> = Button::default().with_label("-").into();
flex.end();
wind.end();
wind.show();
fn button_color(btn: &mut Button, c: Color) {
btn.set_color(c);
btn.redraw();
}
while a.wait() {
if fltk_evented::event() {
match but_inc.event() {
Event::Enter | Event::Move => button_color(&mut but_inc, Color::White),
Event::Leave => button_color(&mut but_inc, Color::BackGround),
_ => (),
}
match but_dec.event() {
Event::Enter | Event::Move => button_color(&mut but_dec, Color::White),
Event::Leave => button_color(&mut but_dec, Color::BackGround),
_ => (),
}
}
}
}
Using on_<event>
methods:
use fltk::{
app, button,
enums::{Color, FrameType},
prelude::*,
window,
};
use fltk_evented::Listener;
fn main() {
let app = app::App::default();
let mut wind = window::Window::default().with_size(400, 300);
wind.set_color(Color::White);
let mut but: Listener<_> = button::Button::new(160, 210, 80, 35, "Click me!").into();
but.set_frame(FrameType::FlatBox);
but.set_color(Color::Cyan);
but.set_selection_color(Color::Cyan.darker());
but.clear_visible_focus();
wind.end();
wind.show();
but.on_hover(|b| {
b.set_color(Color::Cyan.lighter().lighter());
});
but.on_leave(|b| {
b.set_color(Color::Cyan);
});
but.on_click(|b| {
println!("Clicked");
b.set_label_color(Color::White);
});
but.on_release(move |b| {
wind.set_label("Button Released!");
b.set_label_color(Color::Black);
});
app.run().unwrap();
}
fltk-evented can be used with either tokio or async-std to handle non-blocking async calls in the event loop. The following examples shows usage with tokio. Another example using async-std can be found in the examples directory:
use fltk::{prelude::*, *};
use fltk_evented::AsyncListener;
#[tokio::main]
async fn main() -> Result<(), reqwest::Error> {
let mut buf = text::TextBuffer::default();
let a = app::App::default().with_scheme(app::Scheme::Gtk);
app::set_font_size(20);
let mut wind = window::Window::default()
.with_size(400, 300)
.center_screen()
.with_label("Counter");
let col = group::Pack::default()
.with_size(400, 300)
.center_of_parent()
.with_type(group::PackType::Vertical);
let mut editor = text::TextEditor::default().with_size(0, 240);
editor.set_buffer(buf.clone());
let getter: AsyncListener<_> = button::Button::default()
.with_label("Get")
.with_size(0, 60)
.into();
col.end();
wind.end();
wind.show();
while a.wait() {
if getter.triggered().await {
let text = reqwest::get("https://www.rust-lang.org")
.await?
.text()
.await?;
buf.set_text(&text);
}
}
Ok(())
}