84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
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import time
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from kivy.logger import Logger
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from kivy.event import EventDispatcher
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class SwipeBehavior(EventDispatcher):
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def __init__(self, **kwargs):
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self.register_event_type('on_context_menu')
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self.register_event_type('on_swipe_left')
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self.register_event_type('on_swipe_right')
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self.register_event_type('on_swipe_up')
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self.register_event_type('on_swipe_down')
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self.sb_start_point = None
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self.sb_end_point = None
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self.sb_start_time = None
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self.sb_end_time = None
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self.threshold=20
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self.threshold_time = 1.5
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def on_context_menu(self):
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Logger.info('SwipeBehavior:on_context_menu fired')
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def on_swipe_left(self):
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Logger.info('SwipeBehavior:on_swipe_left fired')
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pass
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def on_swipe_right(self):
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Logger.info('SwipeBehavior:on_swipe_right fired')
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pass
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def on_swipe_up(self):
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Logger.info('SwipeBehavior:on_swipe_up fired')
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pass
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def on_swipe_down(self):
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Logger.info('SwipeBehavior:on_swipe_down fired')
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pass
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def on_touch_down(self,touch):
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if self.collide_point(*touch.pos):
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self.sb_start_point = pos
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self.sb_start_time = time.time()
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return super().on_touch_down(touch)
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def on_touch_move(self,touch):
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if self.collide_point(*touch.pos):
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if self.sb_start_point is None:
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self.sb_start_point = touch.pos
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else:
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self.sb_end_point = touch.pos
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return super().on_touch_move()
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def on_touch_up(self,touch):
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if self.collide_point(*touch.pos):
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self.sb_end_point = touch.pos
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self.sb_end_time = time.time()
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self.check_context_menu()
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self.check_swipe()
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self.sb_start_point = None
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self.sb_end_point = None
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self.sb_start_time = None
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self.sb_end_time = None
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super().on_touch_up()
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def check_context_menu(self):
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if not self.sb_start_time:
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return
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if not self.sb_end_time:
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return
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if self.sb_end_time - self.sb_start_time > self.threshold_time:
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self.dispatch('on_context_menu')
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def check_swipe(self):
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if abs(self.sb_end_point.x - self.sb_start_point.x) > \
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abs(self.sb_end_point.y - self.sb_start_point.y):
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if self.sb_end_point.x - self.sb_start_point.x > self.threshold:
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self.dispatch('on_swipe_right')
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elif self.sb_start_point.x - self.sb_end_point.x > self.threshold:
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self.dispatch('on_swipe_left')
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else:
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if self.sb_end_point.y - self.sb_start_point.y > self.threshold:
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self.dispatch('on_swipe_up')
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elif self.sb_start_point.y - self.sb_end_point.x > self.threshold:
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self.dispatch('on_swipe_down')
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