#[cfg(all(feature = "rwh_06", any(x11_platform, macos_platform, windows_platform)))]
#[allow(deprecated)]
fn main() -> Result<(), impl std::error::Error> {
use std::collections::HashMap;
use winit::application::ApplicationHandler;
use winit::dpi::{LogicalPosition, LogicalSize, Position};
use winit::event::{ElementState, KeyEvent, WindowEvent};
use winit::event_loop::{ActiveEventLoop, EventLoop};
use winit::raw_window_handle::HasRawWindowHandle;
use winit::window::{Window, WindowId};
#[path = "util/fill.rs"]
mod fill;
#[derive(Default)]
struct Application {
parent_window_id: Option<WindowId>,
windows: HashMap<WindowId, Window>,
}
impl ApplicationHandler for Application {
fn resumed(&mut self, event_loop: &ActiveEventLoop) {
let attributes = Window::default_attributes()
.with_title("parent window")
.with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
.with_inner_size(LogicalSize::new(640.0f32, 480.0f32));
let window = event_loop.create_window(attributes).unwrap();
println!("Parent window id: {:?})", window.id());
self.parent_window_id = Some(window.id());
self.windows.insert(window.id(), window);
}
fn window_event(
&mut self,
event_loop: &ActiveEventLoop,
window_id: winit::window::WindowId,
event: WindowEvent,
) {
match event {
WindowEvent::CloseRequested => {
self.windows.clear();
event_loop.exit();
},
WindowEvent::CursorEntered { device_id: _ } => {
println!("cursor entered in the window {window_id:?}");
},
WindowEvent::KeyboardInput {
event: KeyEvent { state: ElementState::Pressed, .. },
..
} => {
let parent_window = self.windows.get(&self.parent_window_id.unwrap()).unwrap();
let child_window = spawn_child_window(parent_window, event_loop);
let child_id = child_window.id();
println!("Child window created with id: {child_id:?}");
self.windows.insert(child_id, child_window);
},
WindowEvent::RedrawRequested => {
if let Some(window) = self.windows.get(&window_id) {
fill::fill_window(window);
}
},
_ => (),
}
}
}
fn spawn_child_window(parent: &Window, event_loop: &ActiveEventLoop) -> Window {
let parent = parent.raw_window_handle().unwrap();
let mut window_attributes = Window::default_attributes()
.with_title("child window")
.with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
.with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
.with_visible(true);
window_attributes = unsafe { window_attributes.with_parent_window(Some(parent)) };
event_loop.create_window(window_attributes).unwrap()
}
let event_loop: EventLoop<()> = EventLoop::new().unwrap();
let mut app = Application::default();
event_loop.run_app(&mut app)
}
#[cfg(all(feature = "rwh_06", not(any(x11_platform, macos_platform, windows_platform))))]
fn main() {
panic!(
"This example is supported only on x11, macOS, and Windows, with the `rwh_06` feature \
enabled."
);
}