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Extend window.rs example to show window on non-default X screens #1

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Extend window.rs example to show window on non-default X screens #1

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51 changes: 45 additions & 6 deletions examples/window.rs
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Original file line number Diff line number Diff line change
@@ -1,28 +1,67 @@
#![allow(clippy::single_match)]

use raw_window_handle::{HasRawDisplayHandle, RawDisplayHandle, XlibWindowHandle};
use simple_logger::SimpleLogger;
use winit::{
event::{Event, WindowEvent},
event_loop::EventLoop,
platform::x11::{WindowBuilderExtX11, WindowExtX11},
window::WindowBuilder,
};
use x11_dl::xlib;

#[path = "util/fill.rs"]
mod fill;

fn main() {
SimpleLogger::new().init().unwrap();
let screen_number = std::env::args()
.nth(1)
.expect("please specify screen number to run on as first commandline argument")
.parse()
.expect("could not parse first commandline argument as i32");

SimpleLogger::new().env().init().unwrap();
let event_loop = EventLoop::new();

let window = WindowBuilder::new()
// Extract connection fro X from winit't event loop. 🤷
let display_handle = event_loop.raw_display_handle();
let RawDisplayHandle::Xlib(xlib_display_handle) = display_handle else {
eprintln!("{display_handle:?} was not XlibDisplayHandle");
return;
};
let display: *mut xlib::_XDisplay = xlib_display_handle.display.cast();

// Load Xlib library.
let xlib = xlib::Xlib::open().unwrap();
log::debug!(
"X server we connected to has {} screens (using `XScreenCount(display)`).",
unsafe { (xlib.XScreenCount)(display) }
);

let root_window_id = unsafe { (xlib.XRootWindow)(display, screen_number) };
log::debug!(
"id of root window of screen {} is {}.",
screen_number,
root_window_id
);

let mut root_window_handle = XlibWindowHandle::empty();
root_window_handle.window = root_window_id;
dbg!(root_window_handle);

let window_builder = WindowBuilder::new()
.with_title("A fantastic window!")
.with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
.build(&event_loop)
.unwrap();
.with_inner_size(winit::dpi::LogicalSize::new(500.0, 500.0))
.with_x11_screen(screen_number);
// We need to specify matching root window (every X screen has its own one):
let window_builder =
unsafe { window_builder.with_parent_window(Some(root_window_handle.into())) };
let window = window_builder.build(&event_loop).unwrap();

dbg!(window.xlib_screen_id());

event_loop.run(move |event, _, control_flow| {
control_flow.set_wait();
println!("{event:?}");

match event {
Event::WindowEvent {
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