Vendor things

third-party/vendor/winit/examples/theme.rs

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+#![allow(clippy::single_match)]
+
+use simple_logger::SimpleLogger;
+use winit::{
+    event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::{Theme, WindowBuilder},
+};
+
+fn main() {
+    SimpleLogger::new().init().unwrap();
+    let event_loop = EventLoop::new();
+
+    let window = WindowBuilder::new()
+        .with_title("A fantastic window!")
+        .with_theme(Some(Theme::Dark))
+        .build(&event_loop)
+        .unwrap();
+
+    println!("Initial theme: {:?}", window.theme());
+    println!("debugging keys:");
+    println!("  (A) Automatic theme");
+    println!("  (L) Light theme");
+    println!("  (D) Dark theme");
+
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::ThemeChanged(theme),
+                window_id,
+                ..
+            } if window_id == window.id() => {
+                println!("Theme is changed: {theme:?}")
+            }
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        input:
+                            KeyboardInput {
+                                virtual_keycode: Some(key),
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => match key {
+                VirtualKeyCode::A => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(None);
+                }
+                VirtualKeyCode::L => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(Some(Theme::Light));
+                }
+                VirtualKeyCode::D => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(Some(Theme::Dark));
+                }
+                _ => (),
+            },
+            _ => (),
+        }
+    });
+}