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// MIT/Apache2 License
#[cfg(feature = "async-std-support")]
#[path = "util/cancel.rs"]
mod cancel;
#[cfg(feature = "async-std-support")]
use breadx::Result;
#[cfg(feature = "async-std-support")]
mod inner {
use async_std::io::prelude::*;
use breadx::{
prelude::*,
protocol::{xproto, Event},
rt_support::async_std_support,
Result,
};
pub async fn real_main() -> Result<()> {
super::cancel::spawn_kill_thread();
// almost identical to the tokio example, see that for comments
let mut connection = async_std_support::connect(None).await?;
// the events our windows receives.
let events = xproto::EventMask::EXPOSURE | xproto::EventMask::BUTTON_PRESS;
// the background color
let background = connection.default_screen().white_pixel;
// create the new window
let parent = connection.default_screen().root;
let wid = connection.generate_xid().await?;
connection
.create_window_checked(
0,
wid,
parent,
0,
0,
600,
400,
0,
xproto::WindowClass::COPY_FROM_PARENT,
0,
xproto::CreateWindowAux::new()
.event_mask(events)
.background_pixel(background),
)
.await?;
// map to screen and set title
connection.map_window_checked(wid).await?;
let title = "Hello from async-std!";
connection
.change_property_checked(
xproto::PropMode::REPLACE,
wid,
xproto::AtomEnum::WM_NAME.into(),
xproto::AtomEnum::STRING.into(),
8,
title.len() as u32,
title,
)
.await?;
// set up a GC for drawing
let gc = connection.generate_xid().await?;
connection
.create_gc_checked(
gc,
wid,
xproto::CreateGCAux::new()
.foreground(connection.default_screen().black_pixel)
.graphics_exposures(0)
.line_width(10),
)
.await?;
// create some colors
let cmap = connection.default_screen().default_colormap;
let red_color = connection.alloc_color(cmap, 0xffff, 0, 0).await?;
let green_color = connection.alloc_color(cmap, 0, 0xffff, 0).await?;
let blue_color = connection.alloc_color(cmap, 0, 0, 0xffff).await?;
connection.flush().await?;
// resolve the colors
let red_pixel = connection.wait_for_reply(red_color).await?.pixel;
let green_pixel = connection.wait_for_reply(green_color).await?.pixel;
let blue_pixel = connection.wait_for_reply(blue_color).await?.pixel;
// setup exit strategy
let wm_protocols = connection.intern_atom(false, "WM_PROTOCOLS").await?;
let wm_delete_window = connection.intern_atom(false, "WM_DELETE_WINDOW").await?;
connection.flush().await?;
let wm_protocols = connection.wait_for_reply(wm_protocols).await?.atom;
let wm_delete_window = connection.wait_for_reply(wm_delete_window).await?.atom;
connection
.change_property_checked(
xproto::PropMode::REPLACE,
wid,
wm_protocols,
xproto::AtomEnum::ATOM.into(),
32,
1,
&wm_delete_window,
)
.await?;
super::cancel::spawn_close_thread(wid);
// primary event loop
loop {
let event = connection.wait_for_event().await?;
match event {
Event::Expose(_) => {
// begin the repaint
// draw a red "X"
connection
.change_gc(gc, xproto::ChangeGCAux::new().foreground(red_pixel))
.await?;
connection
.poly_segment(
wid,
gc,
&[
xproto::Segment {
x1: 10,
y1: 10,
x2: 150,
y2: 150,
},
xproto::Segment {
x1: 150,
y1: 10,
x2: 10,
y2: 150,
},
],
)
.await?;
// draw a green circle
connection
.change_gc(gc, xproto::ChangeGCAux::new().foreground(green_pixel))
.await?;
connection
.poly_fill_arc(
wid,
gc,
&[xproto::Arc {
x: 200,
y: 10,
width: 150,
height: 150,
angle1: 0,
angle2: 360 * 64,
}],
)
.await?;
// draw a blue semicircle
connection
.change_gc(gc, xproto::ChangeGCAux::new().foreground(blue_pixel))
.await?;
connection
.poly_fill_arc(
wid,
gc,
&[xproto::Arc {
x: 200,
y: 10,
width: 150,
height: 150,
angle1: 0,
angle2: 270 * 64,
}],
)
.await?;
// draw the black outline of a circle
connection
.change_gc(
gc,
xproto::ChangeGCAux::new()
.foreground(connection.default_screen().black_pixel),
)
.await?;
connection
.poly_arc(
wid,
gc,
&[xproto::Arc {
x: 200,
y: 10,
width: 150,
height: 150,
angle1: 0,
angle2: 360 * 64,
}],
)
.await?;
// end the repaint
connection.flush().await?;
}
Event::ButtonPress(bp) => {
// indicate the button press
let mut stdout = async_std::io::stdout();
writeln!(stdout, "Detected click at ({}, {})", bp.event_x, bp.event_y)
.await
.unwrap();
}
Event::ClientMessage(cme) => {
// check if exit msg
if cme.data.as_data32()[0] == wm_delete_window {
break;
}
}
_ => {}
}
}
Ok(())
}
}
#[async_std::main]
#[cfg(feature = "async-std-support")]
async fn main() -> Result<()> {
tracing_subscriber::fmt::init();
inner::real_main().await
}
#[cfg(not(feature = "async-std-support"))]
fn main() {
println!("This example requires the `async-std-support` feature to be enabled.");
}