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eadd9a19b2
* Replace Closed event with CloseRequested and Destroyed Implements #434 The existing Closed event had ambiguous meaning, both in name and in cross-platform behavior. Closed is now split into two more precise events: * CloseRequested - the window has been requested to close, most commonly by having clicked the window's close button. Whether or not you respond by closing the window is up to you. * Destroyed - the window has been destroyed, and can no longer be safely used. Most notably, now you can reliably implement classic patterns like prompting the user to save their work before closing, and have the opportunity to perform any necessary cleanup. Migrating to the new API is straightforward. In most cases, you can simply replace all existing usages of Closed with CloseRequested. For more information, see the example programs, particularly handling_close and multiwindow. iOS applications must replace all usages of Closed with Destroyed, and require no other changes.
34 lines
894 B
Rust
34 lines
894 B
Rust
extern crate winit;
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use std::collections::HashMap;
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fn main() {
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let mut events_loop = winit::EventsLoop::new();
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let mut windows = HashMap::new();
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for _ in 0..3 {
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let window = winit::Window::new(&events_loop).unwrap();
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windows.insert(window.id(), window);
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}
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events_loop.run_forever(|event| {
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match event {
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winit::Event::WindowEvent {
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event: winit::WindowEvent::CloseRequested,
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window_id,
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} => {
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println!("Window {:?} has received the signal to close", window_id);
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// This drops the window, causing it to close.
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windows.remove(&window_id);
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if windows.is_empty() {
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return winit::ControlFlow::Break;
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}
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}
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_ => (),
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}
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winit::ControlFlow::Continue
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})
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}
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