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inpututil: Add IsTouchJustReleased (#504)

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This commit is contained in:
Hajime Hoshi 2018-02-17 03:58:19 +09:00
parent a7fafc74e7
commit d3f573523a
1 changed files with 20 additions and 1 deletions
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19
inpututil/inpututil.go
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@ -34,6 +34,7 @@ type inputState struct {
prevGamepadButtonStates map[int]map[ebiten.GamepadButton]int
touchStates map[int]int
prevTouchStates map[int]int
m sync.RWMutex
}
@ -127,8 +128,15 @@ func (i *inputState) update() {
// Touches
ids = map[int]struct{}{}
// Reset the previous states first since some gamepad IDs might be already gone.
for id := range i.prevTouchStates {
i.prevTouchStates[id] = 0
}
for _, t := range ebiten.Touches() {
ids[t.ID()] = struct{}{}
i.prevTouchStates[t.ID()] = i.touchStates[t.ID()]
i.touchStates[t.ID()]++
}
idsToDelete = []int{}
@ -248,6 +256,17 @@ func IsJustTouched(id int) bool {
return TouchDuration(id) == 1
}
// IsTouchJustReleased returns a boolean value indicating
// whether the given touch is released just in the current frame.
//
// IsTouchJustReleased is concurrent safe.
func IsTouchJustReleased(id int) bool {
theInputState.m.RLock()
r := theInputState.touchStates[id] == 0 && theInputState.prevTouchStates[id] > 0
theInputState.m.RUnlock()
return r
}
// TouchDuration returns how long the touch remains in frames.
//
// TouchDuration is concurrent safe.