89 lines
3.7 KiB
Rust
89 lines
3.7 KiB
Rust
#[cfg(all(feature = "rwh_06", any(x11_platform, macos_platform, windows_platform)))]
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#[allow(deprecated)]
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fn main() -> Result<(), impl std::error::Error> {
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use std::collections::HashMap;
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use winit::dpi::{LogicalPosition, LogicalSize, Position};
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use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
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use winit::event_loop::{ActiveEventLoop, EventLoop};
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use winit::raw_window_handle::HasRawWindowHandle;
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use winit::window::Window;
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#[path = "util/fill.rs"]
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mod fill;
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fn spawn_child_window(parent: &Window, event_loop: &ActiveEventLoop) -> Window {
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let parent = parent.raw_window_handle().unwrap();
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let mut window_attributes = Window::default_attributes()
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.with_title("child window")
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.with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
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.with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
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.with_visible(true);
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// `with_parent_window` is unsafe. Parent window must be a valid window.
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window_attributes = unsafe { window_attributes.with_parent_window(Some(parent)) };
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event_loop.create_window(window_attributes).unwrap()
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}
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let mut windows = HashMap::new();
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let event_loop: EventLoop<()> = EventLoop::new().unwrap();
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let mut parent_window_id = None;
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event_loop.run(move |event: Event<()>, event_loop| {
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match event {
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Event::Resumed => {
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let attributes = Window::default_attributes()
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.with_title("parent window")
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.with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
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.with_inner_size(LogicalSize::new(640.0f32, 480.0f32));
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let window = event_loop.create_window(attributes).unwrap();
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parent_window_id = Some(window.id());
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println!("Parent window id: {parent_window_id:?})");
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windows.insert(window.id(), window);
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},
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Event::WindowEvent { window_id, event } => match event {
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WindowEvent::CloseRequested => {
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windows.clear();
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event_loop.exit();
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},
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WindowEvent::CursorEntered { device_id: _ } => {
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// On x11, println when the cursor entered in a window even if the child window
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// is created by some key inputs.
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// the child windows are always placed at (0, 0) with size (200, 200) in the
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// parent window, so we also can see this log when we move
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// the cursor around (200, 200) in parent window.
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println!("cursor entered in the window {window_id:?}");
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},
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WindowEvent::KeyboardInput {
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event: KeyEvent { state: ElementState::Pressed, .. },
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..
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} => {
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let parent_window = windows.get(&parent_window_id.unwrap()).unwrap();
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let child_window = spawn_child_window(parent_window, event_loop);
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let child_id = child_window.id();
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println!("Child window created with id: {child_id:?}");
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windows.insert(child_id, child_window);
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},
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WindowEvent::RedrawRequested => {
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if let Some(window) = windows.get(&window_id) {
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fill::fill_window(window);
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}
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},
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_ => (),
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},
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_ => (),
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}
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})
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}
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#[cfg(all(feature = "rwh_06", not(any(x11_platform, macos_platform, windows_platform))))]
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fn main() {
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panic!(
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"This example is supported only on x11, macOS, and Windows, with the `rwh_06` feature \
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enabled."
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);
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}
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