Overhaul device events API and add gamepad support on Windows (#804)

* Initial implementation * Corrected RAWINPUT buffer sizing * Mostly complete XInput implementation * XInput triggers * Add preliminary CHANGELOG entry. * match unix common API to evl 2.0 * wayland: eventloop2.0 * make EventLoopProxy require T: 'static * Revamp device event API, as well as several misc. fixes on Windows: * When you have multiple windows, you no longer receive duplicate device events * Mouse Device Events now send X-button input * Mouse Device Events now send horizontal scroll wheel input * Add MouseEvent documentation and Device ID debug passthrough * Improve type safety on get_raw_input_data * Remove button_id field from MouseEvent::Button in favor of �utton * Remove regex dependency on Windows * Remove axis filtering in XInput * Make gamepads not use lazy_static * Publicly expose gamepad rumble * Unstack DeviceEvent and fix examples/tests * Add HANDLE retrieval method to DeviceExtWindows * Add distinction between non-joystick axes and joystick axes. This helps with properly calculating the deadzone for controller joysticks. One potential issue is that the `Stick` variant isn't used for *all* joysticks, which could be potentially confusing - for example, raw input joysticks will never use the `Stick` variant because we don't understand the semantic meaning of raw input joystick axes. * Add ability to get gamepad port * Fix xinput controller hot swapping * Add functions for enumerating attached devices * Clamp input to [0.0, 1.0] on gamepad rumble * Expose gamepad rumble errors * Add method to check if device is still connected * Add docs * Rename AxisHint and ButtonHint to GamepadAxis and GamepadButton * Add CHANGELOG entry * Update CHANGELOG.md * Add HidId and MovedAbsolute * Fix xinput deprecation warnings * Add ability to retrieve gamepad battery level * Fix weird imports in gamepad example * Update CHANGELOG.md * Resolve francesca64 comments
rust-windowing · Jun 21, 2019 · 208e0bc · 208e0bc
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -47,6 +47,20 @@
 - On Windows, fix initial dimensions of a fullscreen window.
 - On Windows, Fix transparent borderless windows rendering wrong.
 
+- Improve event API documentation.
+- Overhaul device event API:
+  - **Breaking**: `Event::DeviceEvent` split into `MouseEvent`, `KeyboardEvent`, and `GamepadEvent`.
+  - **Breaking**: Remove `DeviceEvent::Text` variant.
+  - **Breaking**: `DeviceId` split into `MouseId`, `KeyboardId`, and `GamepadHandle`.
+  - **Breaking**: Removed device IDs from `WindowEvent` variants.
+  - Add `enumerate` function on device ID types to list all attached devices of that type.
+  - Add `is_connected` function on device ID types check if the specified device is still available.
+  - **Breaking**: On Windows, rename `DeviceIdExtWindows` to `DeviceExtWindows`.
+    - Add `handle` function to retrieve the underlying `HANDLE`.
+- On Windows, fix duplicate device events getting sent if Winit managed multiple windows.
+- On Windows, raw mouse events now report Mouse4 and Mouse5 presses and releases.
+- Added gamepad support on Windows via raw input and XInput.
+
 # Version 0.19.1 (2019-04-08)
 
 - On Wayland, added a `get_wayland_display` function to `EventsLoopExt`.

diff --git a/Cargo.toml b/Cargo.toml
@@ -41,6 +41,7 @@ objc = "0.2.3"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 bitflags = "1"
+rusty-xinput = "1.0"
 
 [target.'cfg(target_os = "windows")'.dependencies.winapi]
 version = "0.3.6"
@@ -49,6 +50,7 @@ features = [
     "commctrl",
     "dwmapi",
     "errhandlingapi",
+    "hidpi",
     "hidusage",
     "libloaderapi",
     "objbase",
@@ -64,6 +66,7 @@ features = [
     "wingdi",
     "winnt",
     "winuser",
+    "xinput",
 ]
 
 [target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd"))'.dependencies]

diff --git a/examples/cursor.rs b/examples/cursor.rs
@@ -16,14 +16,10 @@ fn main() {
         match event {
             Event::WindowEvent {
                 event:
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                state: ElementState::Pressed,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        state: ElementState::Pressed,
                         ..
-                    },
+                    }),
                 ..
             } => {
                 println!("Setting cursor to \"{:?}\"", CURSORS[cursor_idx]);

diff --git a/examples/cursor_grab.rs b/examples/cursor_grab.rs
@@ -17,16 +17,12 @@ fn main() {
         if let Event::WindowEvent { event, .. } = event {
             match event {
                 WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
-                WindowEvent::KeyboardInput {
-                    input:
-                        KeyboardInput {
-                            state: ElementState::Released,
-                            virtual_keycode: Some(key),
-                            modifiers,
-                            ..
-                        },
+                WindowEvent::KeyboardInput(KeyboardInput {
+                    state: ElementState::Released,
+                    virtual_keycode: Some(key),
+                    modifiers,
                     ..
-                } => {
+                }) => {
                     use winit::event::VirtualKeyCode::*;
                     match key {
                         Escape => *control_flow = ControlFlow::Exit,

diff --git a/examples/fullscreen.rs b/examples/fullscreen.rs
@@ -57,15 +57,11 @@ fn main() {
             Event::WindowEvent { event, .. } => {
                 match event {
                     WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                virtual_keycode: Some(virtual_code),
-                                state,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        virtual_keycode: Some(virtual_code),
+                        state,
                         ..
-                    } => {
+                    }) => {
                         match (virtual_code, state) {
                             (VirtualKeyCode::Escape, _) => *control_flow = ControlFlow::Exit,
                             (VirtualKeyCode::F, ElementState::Pressed) => {

diff --git a/examples/gamepad.rs b/examples/gamepad.rs
@@ -0,0 +1,52 @@
+use winit::{
+    event::{
+        device::{GamepadEvent, GamepadHandle},
+        Event, WindowEvent,
+    },
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
+
+fn main() {
+    let event_loop = EventLoop::new();
+
+    let _window = WindowBuilder::new()
+        .with_title("The world's worst video game")
+        .build(&event_loop)
+        .unwrap();
+
+    println!("enumerating gamepads:");
+    for gamepad in GamepadHandle::enumerate(&event_loop) {
+        println!(
+            "    gamepad={:?}\tport={:?}\tbattery level={:?}",
+            gamepad,
+            gamepad.port(),
+            gamepad.battery_level()
+        );
+    }
+
+    let deadzone = 0.12;
+
+    event_loop.run(move |event, _, control_flow| {
+        match event {
+            Event::GamepadEvent(gamepad_handle, event) => {
+                match event {
+                    // Discard any Axis events that has a corresponding Stick event.
+                    GamepadEvent::Axis { stick: true, .. } => (),
+
+                    // Discard any Stick event that falls inside the stick's deadzone.
+                    GamepadEvent::Stick {
+                        x_value, y_value, ..
+                    } if (x_value.powi(2) + y_value.powi(2)).sqrt() < deadzone => (),
+
+                    _ => println!("[{:?}] {:#?}", gamepad_handle, event),
+                }
+            },
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
+            _ => (),
+        }
+    });
+}
diff --git a/examples/gamepad_rumble.rs b/examples/gamepad_rumble.rs
@@ -0,0 +1,60 @@
+use std::time::Instant;
+use winit::event_loop::EventLoop;
+
+#[derive(Debug, Clone)]
+enum Rumble {
+    None,
+    Left,
+    Right,
+}
+
+fn main() {
+    let event_loop = EventLoop::new();
+
+    // You should generally use `GamepadEvent::Added/Removed` to detect gamepads, as doing that will
+    // allow you to more easily support gamepad hotswapping. However, we're using `enumerate` here
+    // because it makes this example more concise.
+    let gamepads = winit::event::device::GamepadHandle::enumerate(&event_loop).collect::<Vec<_>>();
+
+    let rumble_patterns = &[
+        (0.5, Rumble::None),
+        (2.0, Rumble::Left),
+        (0.5, Rumble::None),
+        (2.0, Rumble::Right),
+    ];
+    let mut rumble_iter = rumble_patterns.iter().cloned().cycle();
+
+    let mut active_pattern = rumble_iter.next().unwrap();
+    let mut timeout = active_pattern.0;
+    let mut timeout_start = Instant::now();
+
+    event_loop.run(move |_, _, _| {
+        if timeout <= active_pattern.0 {
+            let t = (timeout / active_pattern.0) * std::f64::consts::PI;
+            let intensity = t.sin();
+
+            for g in &gamepads {
+                let result = match active_pattern.1 {
+                    Rumble::Left => g.rumble(intensity, 0.0),
+                    Rumble::Right => g.rumble(0.0, intensity),
+                    Rumble::None => Ok(()),
+                };
+
+                if let Err(e) = result {
+                    println!("Rumble failed: {:?}", e);
+                }
+            }
+
+            timeout = (Instant::now() - timeout_start).as_millis() as f64 / 1000.0;
+        } else {
+            active_pattern = rumble_iter.next().unwrap();
+            println!(
+                "Rumbling {:?} for {:?} seconds",
+                active_pattern.1, active_pattern.0
+            );
+
+            timeout = 0.0;
+            timeout_start = Instant::now();
+        }
+    });
+}
diff --git a/examples/handling_close.rs b/examples/handling_close.rs
@@ -41,15 +41,11 @@ fn main() {
                         // closing the window. How to close the window is detailed in the handler for
                         // the Y key.
                     },
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                virtual_keycode: Some(virtual_code),
-                                state: Released,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        virtual_keycode: Some(virtual_code),
+                        state: Released,
                         ..
-                    } => {
+                    }) => {
                         match virtual_code {
                             Y => {
                                 if close_requested {

diff --git a/examples/multithreaded.rs b/examples/multithreaded.rs
@@ -24,16 +24,12 @@ fn main() {
         thread::spawn(move || {
             while let Ok(event) = rx.recv() {
                 match event {
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                state: ElementState::Released,
-                                virtual_keycode: Some(key),
-                                modifiers,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        state: ElementState::Released,
+                        virtual_keycode: Some(key),
+                        modifiers,
                         ..
-                    } => {
+                    }) => {
                         window.set_title(&format!("{:?}", key));
                         let state = !modifiers.shift;
                         use self::VirtualKeyCode::*;
@@ -118,14 +114,10 @@ fn main() {
                 match event {
                     WindowEvent::CloseRequested
                     | WindowEvent::Destroyed
-                    | WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                virtual_keycode: Some(VirtualKeyCode::Escape),
-                                ..
-                            },
+                    | WindowEvent::KeyboardInput(KeyboardInput {
+                        virtual_keycode: Some(VirtualKeyCode::Escape),
                         ..
-                    } => {
+                    }) => {
                         window_senders.remove(&window_id);
                     },
                     _ => {

diff --git a/examples/multiwindow.rs b/examples/multiwindow.rs
@@ -29,14 +29,10 @@ fn main() {
                             *control_flow = ControlFlow::Exit;
                         }
                     },
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                state: ElementState::Pressed,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        state: ElementState::Pressed,
                         ..
-                    } => {
+                    }) => {
                         let window = Window::new(&event_loop).unwrap();
                         windows.insert(window.id(), window);
                     },

diff --git a/examples/resizable.rs b/examples/resizable.rs
@@ -22,15 +22,11 @@ fn main() {
             Event::WindowEvent { event, .. } => {
                 match event {
                     WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
-                    WindowEvent::KeyboardInput {
-                        input:
-                            KeyboardInput {
-                                virtual_keycode: Some(VirtualKeyCode::Space),
-                                state: ElementState::Released,
-                                ..
-                            },
+                    WindowEvent::KeyboardInput(KeyboardInput {
+                        virtual_keycode: Some(VirtualKeyCode::Space),
+                        state: ElementState::Released,
                         ..
-                    } => {
+                    }) => {
                         resizable = !resizable;
                         println!("Resizable: {}", resizable);
                         window.set_resizable(resizable);