64 lines
1.0 KiB
Go
64 lines
1.0 KiB
Go
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package gui
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import (
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"sync"
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"time"
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"github.com/hajimehoshi/ebiten/v2"
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)
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var (
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KeyPressDelayNS = 500_000_000
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KeyPressRepeatNS = 30_000_000
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KeyPressResetNS = 60_000_000
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)
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type keyState struct {
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mu sync.Mutex
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keys map[ebiten.Key]press
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}
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func newKeyState() *keyState {
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return &keyState{
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keys: make(map[ebiten.Key]press),
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}
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}
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type press struct {
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at int64
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repeating bool
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}
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func (k *keyState) AnythingPressed() bool {
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return len(k.keys) > 0
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}
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func (k *keyState) RepeatPressed(key ebiten.Key) bool {
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now := time.Now().UnixNano()
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k.mu.Lock()
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defer k.mu.Unlock()
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if ebiten.IsKeyPressed(key) {
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event, ok := k.keys[key]
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if !ok {
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k.keys[key] = press{at: now}
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return true
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}
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since := now - event.at
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if !event.repeating && since > int64(KeyPressDelayNS) {
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k.keys[key] = press{at: now, repeating: true}
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return true
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} else if event.repeating && since > int64(KeyPressRepeatNS) {
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k.keys[key] = press{at: now, repeating: true}
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return true
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}
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return false
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}
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delete(k.keys, key)
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return false
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}
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