Reference client for Bitmessage: a P2P encrypted decentralised communication protocol:
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# -*- coding: utf-8 -*-
from kivy.animation import Animation
from kivy.clock import Clock
from kivy.core.window import Window
from kivy.lang import Builder
from kivy.metrics import dp
from kivy.properties import OptionProperty, NumericProperty, StringProperty, \
BooleanProperty, ListProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.relativelayout import RelativeLayout
Builder.load_string("""
#: import Window kivy.core.window.Window
<SlidingPanel>
orientation: 'vertical'
size_hint_x: None
width: dp(320)
x: -1 * self.width if self.side == 'left' else Window.width
<PanelShadow>
canvas:
Color:
rgba: root.color
Rectangle:
size: root.size
""")
class PanelShadow(BoxLayout):
color = ListProperty([0, 0, 0, 0])
class SlidingPanel(BoxLayout):
anim_length_close = NumericProperty(0.3)
anim_length_open = NumericProperty(0.3)
animation_t_open = StringProperty('out_sine')
animation_t_close = StringProperty('out_sine')
side = OptionProperty('left', options=['left', 'right'])
_open = False
def __init__(self, **kwargs):
super(SlidingPanel, self).__init__(**kwargs)
self.shadow = PanelShadow()
Clock.schedule_once(lambda x: Window.add_widget(self.shadow,89), 0)
Clock.schedule_once(lambda x: Window.add_widget(self,90), 0)
def toggle(self):
Animation.stop_all(self, 'x')
Animation.stop_all(self.shadow, 'color')
if self._open:
if self.side == 'left':
target_x = -1 * self.width
else:
target_x = Window.width
sh_anim = Animation(duration=self.anim_length_open,
t=self.animation_t_open,
color=[0, 0, 0, 0])
sh_anim.start(self.shadow)
self._get_main_animation(duration=self.anim_length_close,
t=self.animation_t_close,
x=target_x,
is_closing=True).start(self)
self._open = False
else:
if self.side == 'left':
target_x = 0
else:
target_x = Window.width - self.width
Animation(duration=self.anim_length_open, t=self.animation_t_open,
color=[0, 0, 0, 0.5]).start(self.shadow)
self._get_main_animation(duration=self.anim_length_open,
t=self.animation_t_open,
x=target_x,
is_closing=False).start(self)
self._open = True
def _get_main_animation(self, duration, t, x, is_closing):
return Animation(duration=duration, t=t, x=x)
def on_touch_down(self, touch):
# Prevents touch events from propagating to anything below the widget.
super(SlidingPanel, self).on_touch_down(touch)
if self.collide_point(*touch.pos) or self._open:
return True
def on_touch_up(self, touch):
if not self.collide_point(touch.x, touch.y) and self._open:
self.toggle()
return True
super(SlidingPanel, self).on_touch_up(touch)