Reference client for Bitmessage: a P2P encrypted decentralised communication protocol:
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# -*- coding: utf-8 -*-
from kivy.app import App
from kivy.lang import Builder
from kivy.properties import (ListProperty, ObjectProperty, NumericProperty)
from kivy.properties import AliasProperty
from kivy.metrics import dp
Builder.load_string('''
<ElevationBehavior>
canvas.before:
Color:
a: self._soft_shadow_a
Rectangle:
texture: self._soft_shadow_texture
size: self._soft_shadow_size
pos: self._soft_shadow_pos
Color:
a: self._hard_shadow_a
Rectangle:
texture: self._hard_shadow_texture
size: self._hard_shadow_size
pos: self._hard_shadow_pos
Color:
a: 1
<RoundElevationBehavior>
canvas.before:
Color:
a: self._soft_shadow_a
Rectangle:
texture: self._soft_shadow_texture
size: self._soft_shadow_size
pos: self._soft_shadow_pos
Color:
a: self._hard_shadow_a
Rectangle:
texture: self._hard_shadow_texture
size: self._hard_shadow_size
pos: self._hard_shadow_pos
Color:
a: 1
''')
class ElevationBehavior(object):
_elevation = NumericProperty(1)
def _get_elevation(self):
return self._elevation
def _set_elevation(self, elevation):
try:
self._elevation = elevation
except:
self._elevation = 1
elevation = AliasProperty(_get_elevation, _set_elevation,
bind=('_elevation',))
_soft_shadow_texture = ObjectProperty()
_soft_shadow_size = ListProperty([0, 0])
_soft_shadow_pos = ListProperty([0, 0])
_soft_shadow_a = NumericProperty(0)
_hard_shadow_texture = ObjectProperty()
_hard_shadow_size = ListProperty([0, 0])
_hard_shadow_pos = ListProperty([0, 0])
_hard_shadow_a = NumericProperty(0)
def __init__(self, **kwargs):
super(ElevationBehavior, self).__init__(**kwargs)
self.bind(elevation=self._update_shadow,
pos=self._update_shadow,
size=self._update_shadow)
def _update_shadow(self, *args):
if self.elevation > 0:
ratio = self.width / (self.height if self.height != 0 else 1)
if ratio > -2 and ratio < 2:
self._shadow = App.get_running_app().theme_cls.quad_shadow
width = soft_width = self.width * 1.9
height = soft_height = self.height * 1.9
elif ratio <= -2:
self._shadow = App.get_running_app().theme_cls.rec_st_shadow
ratio = abs(ratio)
if ratio > 5:
ratio = ratio * 22
else:
ratio = ratio * 11.5
width = soft_width = self.width * 1.9
height = self.height + dp(ratio)
soft_height = self.height + dp(ratio) + dp(self.elevation) * .5
else:
self._shadow = App.get_running_app().theme_cls.quad_shadow
width = soft_width = self.width * 1.8
height = soft_height = self.height * 1.8
# self._shadow = App.get_running_app().theme_cls.rec_shadow
# ratio = abs(ratio)
# if ratio > 5:
# ratio = ratio * 22
# else:
# ratio = ratio * 11.5
#
# width = self.width + dp(ratio)
# soft_width = self.width + dp(ratio) + dp(self.elevation) * .9
# height = soft_height = self.height * 1.9
x = self.center_x - width / 2
soft_x = self.center_x - soft_width / 2
self._soft_shadow_size = (soft_width, soft_height)
self._hard_shadow_size = (width, height)
y = self.center_y - soft_height / 2 - dp(
.1 * 1.5 ** self.elevation)
self._soft_shadow_pos = (soft_x, y)
self._soft_shadow_a = 0.1 * 1.1 ** self.elevation
self._soft_shadow_texture = self._shadow.textures[
str(int(round(self.elevation - 1)))]
y = self.center_y - height / 2 - dp(.5 * 1.18 ** self.elevation)
self._hard_shadow_pos = (x, y)
self._hard_shadow_a = .4 * .9 ** self.elevation
self._hard_shadow_texture = self._shadow.textures[
str(int(round(self.elevation)))]
else:
self._soft_shadow_a = 0
self._hard_shadow_a = 0
class RoundElevationBehavior(object):
_elevation = NumericProperty(1)
def _get_elevation(self):
return self._elevation
def _set_elevation(self, elevation):
try:
self._elevation = elevation
except:
self._elevation = 1
elevation = AliasProperty(_get_elevation, _set_elevation,
bind=('_elevation',))
_soft_shadow_texture = ObjectProperty()
_soft_shadow_size = ListProperty([0, 0])
_soft_shadow_pos = ListProperty([0, 0])
_soft_shadow_a = NumericProperty(0)
_hard_shadow_texture = ObjectProperty()
_hard_shadow_size = ListProperty([0, 0])
_hard_shadow_pos = ListProperty([0, 0])
_hard_shadow_a = NumericProperty(0)
def __init__(self, **kwargs):
super(RoundElevationBehavior, self).__init__(**kwargs)
self._shadow = App.get_running_app().theme_cls.round_shadow
self.bind(elevation=self._update_shadow,
pos=self._update_shadow,
size=self._update_shadow)
def _update_shadow(self, *args):
if self.elevation > 0:
width = self.width * 2
height = self.height * 2
x = self.center_x - width / 2
self._soft_shadow_size = (width, height)
self._hard_shadow_size = (width, height)
y = self.center_y - height / 2 - dp(.1 * 1.5 ** self.elevation)
self._soft_shadow_pos = (x, y)
self._soft_shadow_a = 0.1 * 1.1 ** self.elevation
self._soft_shadow_texture = self._shadow.textures[
str(int(round(self.elevation)))]
y = self.center_y - height / 2 - dp(.5 * 1.18 ** self.elevation)
self._hard_shadow_pos = (x, y)
self._hard_shadow_a = .4 * .9 ** self.elevation
self._hard_shadow_texture = self._shadow.textures[
str(int(round(self.elevation - 1)))]
else:
self._soft_shadow_a = 0
self._hard_shadow_a = 0