Ajout du GUI

kivy/input/providers/leapfinger.py

@@ -0,0 +1,113 @@
+'''
+Leap Motion - finger only
+=========================
+'''
+
+__all__ = ('LeapFingerEventProvider', 'LeapFingerEvent')
+
+from collections import deque
+from kivy.logger import Logger
+from kivy.input.provider import MotionEventProvider
+from kivy.input.factory import MotionEventFactory
+from kivy.input.motionevent import MotionEvent
+
+_LEAP_QUEUE = deque()
+
+Leap = InteractionBox = None
+
+
+def normalize(value, a, b):
+    return (value - a) / float(b - a)
+
+
+class LeapFingerEvent(MotionEvent):
+
+    def __init__(self, *args, **kwargs):
+        kwargs.setdefault('is_touch', True)
+        kwargs.setdefault('type_id', 'touch')
+        super().__init__(*args, **kwargs)
+        self.profile = ('pos', 'pos3d',)
+
+    def depack(self, args):
+        super().depack(args)
+        if args[0] is None:
+            return
+        x, y, z = args
+        self.sx = normalize(x, -150, 150)
+        self.sy = normalize(y, 40, 460)
+        self.sz = normalize(z, -350, 350)
+        self.z = z
+
+
+class LeapFingerEventProvider(MotionEventProvider):
+
+    __handlers__ = {}
+
+    def start(self):
+        # don't do the import at start, or the error will be always displayed
+        # for user who don't have Leap
+        global Leap, InteractionBox
+        import Leap
+        from Leap import InteractionBox
+
+        class LeapMotionListener(Leap.Listener):
+
+            def on_init(self, controller):
+                Logger.info('leapmotion: Initialized')
+
+            def on_connect(self, controller):
+                Logger.info('leapmotion: Connected')
+
+            def on_disconnect(self, controller):
+                Logger.info('leapmotion: Disconnected')
+
+            def on_frame(self, controller):
+                frame = controller.frame()
+                _LEAP_QUEUE.append(frame)
+
+            def on_exit(self, controller):
+                pass
+
+        self.uid = 0
+        self.touches = {}
+        self.listener = LeapMotionListener()
+        self.controller = Leap.Controller(self.listener)
+
+    def update(self, dispatch_fn):
+        try:
+            while True:
+                frame = _LEAP_QUEUE.popleft()
+                events = self.process_frame(frame)
+                for ev in events:
+                    dispatch_fn(*ev)
+        except IndexError:
+            pass
+
+    def process_frame(self, frame):
+        events = []
+        touches = self.touches
+        available_uid = []
+        for hand in frame.hands:
+            for finger in hand.fingers:
+                # print(hand.id(), finger.id(), finger.tip())
+                uid = '{0}:{1}'.format(hand.id, finger.id)
+                available_uid.append(uid)
+                position = finger.tip_position
+                args = (position.x, position.y, position.z)
+                if uid not in touches:
+                    touch = LeapFingerEvent(self.device, uid, args)
+                    events.append(('begin', touch))
+                    touches[uid] = touch
+                else:
+                    touch = touches[uid]
+                    touch.move(args)
+                    events.append(('update', touch))
+        for key in list(touches.keys())[:]:
+            if key not in available_uid:
+                events.append(('end', touches[key]))
+                del touches[key]
+        return events
+
+
+# registers
+MotionEventFactory.register('leapfinger', LeapFingerEventProvider)