Ajout du GUI

kivy/input/postproc/doubletap.py

@@ -0,0 +1,101 @@
+'''
+Double Tap
+==========
+
+Search touch for a double tap
+'''
+
+__all__ = ('InputPostprocDoubleTap', )
+
+from time import time
+from kivy.config import Config
+from kivy.vector import Vector
+
+
+class InputPostprocDoubleTap(object):
+    '''
+    InputPostProcDoubleTap is a post-processor to check if
+    a touch is a double tap or not.
+    Double tap can be configured in the Kivy config file::
+
+        [postproc]
+        double_tap_time = 250
+        double_tap_distance = 20
+
+    Distance parameter is in the range 0-1000 and time is in milliseconds.
+    '''
+
+    def __init__(self):
+        dist = Config.getint('postproc', 'double_tap_distance')
+        self.double_tap_distance = dist / 1000.0
+        tap_time = Config.getint('postproc', 'double_tap_time')
+        self.double_tap_time = tap_time / 1000.0
+        self.touches = {}
+
+    def find_double_tap(self, ref):
+        '''Find a double tap touch within self.touches.
+        The touch must be not a previous double tap and the distance must be
+        within the specified threshold. Additionally, the touch profiles
+        must be the same kind of touch.
+        '''
+        ref_button = None
+        if 'button' in ref.profile:
+            ref_button = ref.button
+
+        for touchid in self.touches:
+            if ref.uid == touchid:
+                continue
+            etype, touch = self.touches[touchid]
+            if etype != 'end':
+                continue
+            if touch.is_double_tap:
+                continue
+            distance = Vector.distance(
+                Vector(ref.sx, ref.sy),
+                Vector(touch.osx, touch.osy))
+            if distance > self.double_tap_distance:
+                continue
+            if touch.is_mouse_scrolling or ref.is_mouse_scrolling:
+                continue
+            touch_button = None
+            if 'button' in touch.profile:
+                touch_button = touch.button
+            if touch_button != ref_button:
+                continue
+            touch.double_tap_distance = distance
+            return touch
+
+    def process(self, events):
+        if self.double_tap_distance == 0 or self.double_tap_time == 0:
+            return events
+        # first, check if a touch down have a double tap
+        for etype, touch in events:
+            if not touch.is_touch:
+                continue
+            if etype == 'begin':
+                double_tap = self.find_double_tap(touch)
+                if double_tap:
+                    touch.is_double_tap = True
+                    tap_time = touch.time_start - double_tap.time_start
+                    touch.double_tap_time = tap_time
+                    distance = double_tap.double_tap_distance
+                    touch.double_tap_distance = distance
+
+            # add the touch internally
+            self.touches[touch.uid] = (etype, touch)
+
+        # second, check if up-touch is timeout for double tap
+        time_current = time()
+        to_delete = []
+        for touchid in self.touches.keys():
+            etype, touch = self.touches[touchid]
+            if etype != 'end':
+                continue
+            if time_current - touch.time_start < self.double_tap_time:
+                continue
+            to_delete.append(touchid)
+
+        for touchid in to_delete:
+            del self.touches[touchid]
+
+        return events