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Implement swipe and hold

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This commit is contained in:
Kovid Goyal 2014-02-11 10:59:30 +05:30
parent d7ed14e30c
commit cc0ad5d918
1 changed files with 29 additions and 5 deletions
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34
src/calibre/gui2/viewer/gestures.py
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@ -25,8 +25,10 @@ if iswindows and sys.getwindowsversion()[:2] >= (6, 2): # At least windows 7
except Exception:
pass
SWIPE_HOLD_INTERVAL = 0.5 # seconds
HOLD_THRESHOLD = 1.0 # seconds
SWIPE_DISTANCE = 50 # manhattan pixels
TAP_THRESHOLD = 50 # manhattan pixels
SWIPE_DISTANCE = 100 # manhattan pixels
Tap, TapAndHold, Pinch, Swipe, SwipeAndHold = 'Tap', 'TapAndHold', 'Pinch', 'Swipe', 'SwipeAndHold'
Left, Right, Up, Down = 'Left', 'Right', 'Up', 'Down'
@ -121,10 +123,10 @@ class State(QObject):
if TapAndHold in self.possible_gestures:
self.tap_hold_updated.emit(tp)
if SwipeAndHold in self.possible_gestures:
self.swipe_hold_updated.emit(tp)
self.swipe_hold_updated.emit(self.hold_data[1])
else:
self.possible_gestures &= {TapAndHold, SwipeAndHold}
if tp.total_movement > SWIPE_DISTANCE:
if tp.total_movement > TAP_THRESHOLD:
st = tp.swipe_type
if st is None:
self.possible_gestures.clear()
@ -132,7 +134,7 @@ class State(QObject):
self.hold_started = True
self.possible_gestures = {SwipeAndHold}
self.hold_data = (now, st)
self.swipe_hold_started.emit(tp)
self.swipe_hold_started.emit(st)
else:
self.possible_gestures = {TapAndHold}
self.hold_started = True
@ -142,7 +144,7 @@ class State(QObject):
def finalize(self):
if Tap in self.possible_gestures:
tp = next(self.touch_points.itervalues())
if tp.total_movement <= SWIPE_DISTANCE:
if tp.total_movement <= TAP_THRESHOLD:
self.tapped.emit(tp)
return
@ -171,11 +173,15 @@ class GestureHandler(QObject):
def __init__(self, view):
QObject.__init__(self, view)
self.state = State()
self.last_swipe_hold_update = None
self.state.swiped.connect(self.handle_swipe)
self.state.tapped.connect(self.handle_tap)
self.state.tap_hold_started.connect(partial(self.handle_tap_hold, 'start'))
self.state.tap_hold_updated.connect(partial(self.handle_tap_hold, 'update'))
self.state.tap_hold_finished.connect(partial(self.handle_tap_hold, 'end'))
self.state.swipe_hold_started.connect(partial(self.handle_swipe_hold, 'start'))
self.state.swipe_hold_updated.connect(partial(self.handle_swipe_hold, 'update'))
self.state.swipe_hold_finished.connect(partial(self.handle_swipe_hold, 'end'))
self.evmap = {QEvent.TouchBegin: 'start', QEvent.TouchUpdate: 'update', QEvent.TouchEnd: 'end'}
# Ignore fake mouse events generated by the window system from touch
@ -263,3 +269,21 @@ class GestureHandler(QObject):
# We have to use post event otherwise the popup remains an alien widget and does not receive events
QApplication.postEvent(self.parent(), ev)
def handle_swipe_hold(self, action, direction):
view = self.parent()
if action == 'start':
self.last_swipe_hold_update = time.time()
try:
self.handle_swipe(direction)
finally:
view.is_auto_repeat_event = False
elif action == 'update' and self.last_swipe_hold_update is not None and time.time() - self.last_swipe_hold_update > SWIPE_HOLD_INTERVAL:
view.is_auto_repeat_event = True
self.last_swipe_hold_update = time.time()
try:
self.handle_swipe(direction)
finally:
view.is_auto_repeat_event = False
elif action == 'end':
self.last_swipe_hold_update = None