83 lines
2.1 KiB
Rust
83 lines
2.1 KiB
Rust
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//! Keyboard input handling.
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//! 键盘输入处理。
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use std::collections::HashSet;
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/// Keyboard input state.
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/// 键盘输入状态。
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#[derive(Debug, Default)]
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pub struct KeyboardState {
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/// Currently pressed keys.
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/// 当前按下的键。
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pressed: HashSet<String>,
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/// Keys pressed this frame.
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/// 本帧按下的键。
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just_pressed: HashSet<String>,
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/// Keys released this frame.
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/// 本帧释放的键。
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just_released: HashSet<String>,
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}
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impl KeyboardState {
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/// Create new keyboard state.
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/// 创建新的键盘状态。
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pub fn new() -> Self {
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Self::default()
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}
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/// Handle key down event.
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/// 处理按键按下事件。
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pub fn key_down(&mut self, key: String) {
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if !self.pressed.contains(&key) {
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self.just_pressed.insert(key.clone());
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}
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self.pressed.insert(key);
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}
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/// Handle key up event.
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/// 处理按键释放事件。
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pub fn key_up(&mut self, key: String) {
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if self.pressed.remove(&key) {
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self.just_released.insert(key);
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}
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}
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/// Check if a key is currently pressed.
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/// 检查某个键是否当前被按下。
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#[inline]
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pub fn is_key_down(&self, key: &str) -> bool {
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self.pressed.contains(key)
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}
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/// Check if a key was just pressed this frame.
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/// 检查某个键是否在本帧刚被按下。
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#[inline]
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pub fn is_key_just_pressed(&self, key: &str) -> bool {
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self.just_pressed.contains(key)
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}
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/// Check if a key was just released this frame.
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/// 检查某个键是否在本帧刚被释放。
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#[inline]
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pub fn is_key_just_released(&self, key: &str) -> bool {
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self.just_released.contains(key)
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}
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/// Update state for new frame.
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/// 为新帧更新状态。
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pub fn update(&mut self) {
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self.just_pressed.clear();
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self.just_released.clear();
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}
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/// Clear all input state.
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/// 清除所有输入状态。
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pub fn clear(&mut self) {
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self.pressed.clear();
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self.just_pressed.clear();
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self.just_released.clear();
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}
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}
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