kivyblocks/kivyblocks/swipebehavior.py
2021-08-15 16:57:20 +08:00

119 lines
3.4 KiB
Python

import time
from kivy.logger import Logger
class SwipeBehavior(object):
def __init__(self, **kwargs):
object.__init__(self)
self.swipeenable = True
self.register_event_type('on_context_menu')
self.register_event_type('on_swipe_left')
self.register_event_type('on_swipe_right')
self.register_event_type('on_swipe_up')
self.register_event_type('on_swipe_down')
self.sb_start_point = None
self.sb_end_point = None
self.sb_start_time = None
self.sb_end_time = None
self.threshold=20
self.threshold_time = 0.6
self.bind(on_touch_down=self.on_touchdown)
self.bind(on_touch_move=self.on_touchmove)
self.bind(on_touch_up=self.on_touchup)
def disable_swipe(self):
self.swipeenable = False
def enable_swipe(self):
self.swipeenable = True
def on_context_menu(self):
pass
# Logger.info('SwipeBehavior:on_context_menu fired')
def on_swipe_left(self):
pass
# Logger.info('SwipeBehavior:on_swipe_left fired')
def on_swipe_right(self):
pass
# Logger.info('SwipeBehavior:on_swipe_right fired')
def on_swipe_up(self):
pass
# Logger.info('SwipeBehavior:on_swipe_up fired')
def on_swipe_down(self):
pass
# Logger.info('SwipeBehavior:on_swipe_down fired')
def on_touchdown(self,o, touch):
if touch.is_mouse_scrolling:
# Logger.info('SwipeBehavior:is_mouse_scrolling')
return False
if not self.collide_point(touch.x, touch.y):
return False
# Logger.info('SwipeBehavior:touch_down fired')
if self.swipeenable:
# Logger.info('SwipeBehavior:touch_down fired')
self.sb_start_point = touch.pos
self.sb_start_time = time.time()
def on_touchmove(self,o,touch):
if self.collide_point(*touch.pos) and self.swipeenable:
# Logger.info('SwipeBehavior:touch_move fired')
if self.sb_start_point is None:
self.sb_start_point = touch.pos
else:
self.sb_end_point = touch.pos
def on_touchup(self,o,touch):
ret = False
if self.collide_point(*touch.pos) and self.swipeenable:
# Logger.info('SwipeBehavior:touch_up fired')
self.sb_end_point = touch.pos
self.sb_end_time = time.time()
self.check_context_menu()
ret = True
self.check_swipe()
self.sb_start_point = None
self.sb_end_point = None
self.sb_start_time = None
self.sb_end_time = None
def check_context_menu(self):
if not self.sb_start_time:
return
if not self.sb_end_time:
return
period_time = self.sb_end_time - self.sb_start_time
# Logger.info('SwipeBehavior:period_time=%f,threshold_time=%f',
# period_time, self.threshold_time)
if period_time >= self.threshold_time:
self.dispatch('on_context_menu')
def check_swipe(self):
if not self.sb_end_point:
return
if not self.sb_start_point:
return
if abs(self.sb_end_point[0] - self.sb_start_point[0]) > \
abs(self.sb_end_point[1] - self.sb_start_point[1]):
Logger.info('SwipeBehavior:check_swipe x>y')
if self.sb_end_point[0] - self.sb_start_point[0] >= \
self.threshold:
self.dispatch('on_swipe_right')
elif self.sb_start_point[0] - self.sb_end_point[0] >= \
self.threshold:
self.dispatch('on_swipe_left')
else:
# Logger.info('SwipeBehavior:check_swipe x<y')
if self.sb_end_point[1] - self.sb_start_point[1] >= \
self.threshold:
self.dispatch('on_swipe_up')
elif self.sb_start_point[1] - self.sb_end_point[1] >= \
self.threshold:
self.dispatch('on_swipe_down')