Reference client for Bitmessage: a P2P encrypted decentralised communication protocol:
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# -*- coding: utf-8 -*-
'''
Buttons
=======
`Material Design spec, Buttons page <https://www.google.com/design/spec/components/buttons.html>`_
`Material Design spec, Buttons: Floating Action Button page <https://www.google.com/design/spec/components/buttons-floating-action-button.html>`_
TO-DO: DOCUMENT MODULE
'''
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.metrics import dp
from kivy.utils import get_color_from_hex
from kivy.properties import StringProperty, BoundedNumericProperty, \
ListProperty, AliasProperty, BooleanProperty, NumericProperty, \
OptionProperty
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.behaviors import ButtonBehavior
from kivy.uix.boxlayout import BoxLayout
from kivy.animation import Animation
from kivymd.backgroundcolorbehavior import BackgroundColorBehavior
from kivymd.ripplebehavior import CircularRippleBehavior, \
RectangularRippleBehavior
from kivymd.elevationbehavior import ElevationBehavior, \
RoundElevationBehavior
from kivymd.theming import ThemableBehavior
from kivymd.color_definitions import colors
Builder.load_string('''
#:import md_icons kivymd.icon_definitions.md_icons
#:import colors kivymd.color_definitions.colors
#:import MDLabel kivymd.label.MDLabel
<MDIconButton>
size_hint: (None, None)
size: (dp(48), dp(48))
padding: dp(12)
theme_text_color: 'Primary'
MDLabel:
id: _label
font_style: 'Icon'
text: u"{}".format(md_icons[root.icon])
halign: 'center'
theme_text_color: root.theme_text_color
text_color: root.text_color
opposite_colors: root.opposite_colors
valign: 'middle'
<MDFlatButton>
canvas:
Color:
#rgba: self.background_color if self.state == 'normal' else self._bg_color_down
rgba: self._current_button_color
Rectangle:
size: self.size
pos: self.pos
size_hint: (None, None)
height: dp(36)
width: _label.texture_size[0] + dp(16)
padding: (dp(8), 0)
theme_text_color: 'Custom'
text_color: root.theme_cls.primary_color
MDLabel:
id: _label
text: root._text
font_style: 'Button'
size_hint_x: None
text_size: (None, root.height)
height: self.texture_size[1]
theme_text_color: root.theme_text_color
text_color: root.text_color
valign: 'middle'
halign: 'center'
opposite_colors: root.opposite_colors
<MDRaisedButton>:
canvas:
Clear
Color:
rgba: self.background_color_disabled if self.disabled else \
(self.background_color if self.state == 'normal' else self.background_color_down)
Rectangle:
size: self.size
pos: self.pos
anchor_x: 'center'
anchor_y: 'center'
background_color: root.theme_cls.primary_color
background_color_down: root.theme_cls.primary_dark
background_color_disabled: root.theme_cls.divider_color
theme_text_color: 'Primary'
MDLabel:
id: label
font_style: 'Button'
text: root._text
size_hint: None, None
width: root.width
text_size: self.width, None
height: self.texture_size[1]
theme_text_color: root.theme_text_color
text_color: root.text_color
opposite_colors: root.opposite_colors
disabled: root.disabled
halign: 'center'
valign: 'middle'
<MDFloatingActionButton>:
canvas:
Clear
Color:
rgba: self.background_color_disabled if self.disabled else \
(self.background_color if self.state == 'normal' else self.background_color_down)
Ellipse:
size: self.size
pos: self.pos
anchor_x: 'center'
anchor_y: 'center'
background_color: root.theme_cls.accent_color
background_color_down: root.theme_cls.accent_dark
background_color_disabled: root.theme_cls.divider_color
theme_text_color: 'Primary'
MDLabel:
id: label
font_style: 'Icon'
text: u"{}".format(md_icons[root.icon])
size_hint: None, None
size: dp(24), dp(24)
text_size: self.size
theme_text_color: root.theme_text_color
text_color: root.text_color
opposite_colors: root.opposite_colors
disabled: root.disabled
halign: 'center'
valign: 'middle'
''')
class MDIconButton(CircularRippleBehavior, ButtonBehavior, BoxLayout):
icon = StringProperty('circle')
theme_text_color = OptionProperty(None, allownone=True,
options=['Primary', 'Secondary', 'Hint',
'Error', 'Custom'])
text_color = ListProperty(None, allownone=True)
opposite_colors = BooleanProperty(False)
class MDFlatButton(ThemableBehavior, RectangularRippleBehavior,
ButtonBehavior, BackgroundColorBehavior, AnchorLayout):
width = BoundedNumericProperty(dp(64), min=dp(64), max=None,
errorhandler=lambda x: dp(64))
text_color = ListProperty()
text = StringProperty('')
theme_text_color = OptionProperty(None, allownone=True,
options=['Primary', 'Secondary', 'Hint',
'Error', 'Custom'])
text_color = ListProperty(None, allownone=True)
_text = StringProperty('')
_bg_color_down = ListProperty([0, 0, 0, 0])
_current_button_color = ListProperty([0, 0, 0, 0])
def __init__(self, **kwargs):
super(MDFlatButton, self).__init__(**kwargs)
self._current_button_color = self.background_color
self._bg_color_down = get_color_from_hex(
colors[self.theme_cls.theme_style]['FlatButtonDown'])
Clock.schedule_once(lambda x: self.ids._label.bind(
texture_size=self.update_width_on_label_texture))
def update_width_on_label_texture(self, instance, value):
self.ids._label.width = value[0]
def on_text(self, instance, value):
self._text = value.upper()
def on_touch_down(self, touch):
if touch.is_mouse_scrolling:
return False
elif not self.collide_point(touch.x, touch.y):
return False
elif self in touch.ud:
return False
elif self.disabled:
return False
else:
self.fade_bg = Animation(duration=.2, _current_button_color=get_color_from_hex(
colors[self.theme_cls.theme_style]['FlatButtonDown']))
self.fade_bg.start(self)
return super(MDFlatButton, self).on_touch_down(touch)
def on_touch_up(self, touch):
if touch.grab_current is self:
self.fade_bg.stop_property(self, '_current_button_color')
Animation(duration=.05, _current_button_color=self.background_color).start(self)
return super(MDFlatButton, self).on_touch_up(touch)
class MDRaisedButton(ThemableBehavior, RectangularRippleBehavior,
ElevationBehavior, ButtonBehavior,
AnchorLayout):
_bg_color_down = ListProperty([])
background_color = ListProperty()
background_color_down = ListProperty()
background_color_disabled = ListProperty()
theme_text_color = OptionProperty(None, allownone=True,
options=['Primary', 'Secondary', 'Hint',
'Error', 'Custom'])
text_color = ListProperty(None, allownone=True)
def _get_bg_color_down(self):
return self._bg_color_down
def _set_bg_color_down(self, color, alpha=None):
if len(color) == 2:
self._bg_color_down = get_color_from_hex(
colors[color[0]][color[1]])
if alpha:
self._bg_color_down[3] = alpha
elif len(color) == 4:
self._bg_color_down = color
background_color_down = AliasProperty(_get_bg_color_down,
_set_bg_color_down,
bind=('_bg_color_down',))
_bg_color_disabled = ListProperty([])
def _get_bg_color_disabled(self):
return self._bg_color_disabled
def _set_bg_color_disabled(self, color, alpha=None):
if len(color) == 2:
self._bg_color_disabled = get_color_from_hex(
colors[color[0]][color[1]])
if alpha:
self._bg_color_disabled[3] = alpha
elif len(color) == 4:
self._bg_color_disabled = color
background_color_disabled = AliasProperty(_get_bg_color_disabled,
_set_bg_color_disabled,
bind=('_bg_color_disabled',))
_elev_norm = NumericProperty(2)
def _get_elev_norm(self):
return self._elev_norm
def _set_elev_norm(self, value):
self._elev_norm = value if value <= 12 else 12
self._elev_raised = (value + 6) if value + 6 <= 12 else 12
self.elevation = self._elev_norm
elevation_normal = AliasProperty(_get_elev_norm, _set_elev_norm,
bind=('_elev_norm',))
_elev_raised = NumericProperty(8)
def _get_elev_raised(self):
return self._elev_raised
def _set_elev_raised(self, value):
self._elev_raised = value if value + self._elev_norm <= 12 else 12
elevation_raised = AliasProperty(_get_elev_raised, _set_elev_raised,
bind=('_elev_raised',))
text = StringProperty()
_text = StringProperty()
def __init__(self, **kwargs):
super(MDRaisedButton, self).__init__(**kwargs)
self.elevation_press_anim = Animation(elevation=self.elevation_raised,
duration=.2, t='out_quad')
self.elevation_release_anim = Animation(
elevation=self.elevation_normal, duration=.2, t='out_quad')
def on_disabled(self, instance, value):
if value:
self.elevation = 0
else:
self.elevation = self.elevation_normal
super(MDRaisedButton, self).on_disabled(instance, value)
def on_touch_down(self, touch):
if not self.disabled:
if touch.is_mouse_scrolling:
return False
if not self.collide_point(touch.x, touch.y):
return False
if self in touch.ud:
return False
Animation.cancel_all(self, 'elevation')
self.elevation_press_anim.start(self)
return super(MDRaisedButton, self).on_touch_down(touch)
def on_touch_up(self, touch):
if not self.disabled:
if touch.grab_current is not self:
return super(ButtonBehavior, self).on_touch_up(touch)
Animation.cancel_all(self, 'elevation')
self.elevation_release_anim.start(self)
else:
Animation.cancel_all(self, 'elevation')
self.elevation = 0
return super(MDRaisedButton, self).on_touch_up(touch)
def on_text(self, instance, text):
self._text = text.upper()
def on__elev_norm(self, instance, value):
self.elevation_release_anim = Animation(elevation=value,
duration=.2, t='out_quad')
def on__elev_raised(self, instance, value):
self.elevation_press_anim = Animation(elevation=value,
duration=.2, t='out_quad')
class MDFloatingActionButton(ThemableBehavior, CircularRippleBehavior,
RoundElevationBehavior, ButtonBehavior,
AnchorLayout):
_bg_color_down = ListProperty([])
background_color = ListProperty()
background_color_down = ListProperty()
background_color_disabled = ListProperty()
theme_text_color = OptionProperty(None, allownone=True,
options=['Primary', 'Secondary', 'Hint',
'Error', 'Custom'])
text_color = ListProperty(None, allownone=True)
def _get_bg_color_down(self):
return self._bg_color_down
def _set_bg_color_down(self, color, alpha=None):
if len(color) == 2:
self._bg_color_down = get_color_from_hex(
colors[color[0]][color[1]])
if alpha:
self._bg_color_down[3] = alpha
elif len(color) == 4:
self._bg_color_down = color
background_color_down = AliasProperty(_get_bg_color_down,
_set_bg_color_down,
bind=('_bg_color_down',))
_bg_color_disabled = ListProperty([])
def _get_bg_color_disabled(self):
return self._bg_color_disabled
def _set_bg_color_disabled(self, color, alpha=None):
if len(color) == 2:
self._bg_color_disabled = get_color_from_hex(
colors[color[0]][color[1]])
if alpha:
self._bg_color_disabled[3] = alpha
elif len(color) == 4:
self._bg_color_disabled = color
background_color_disabled = AliasProperty(_get_bg_color_disabled,
_set_bg_color_disabled,
bind=('_bg_color_disabled',))
icon = StringProperty('android')
_elev_norm = NumericProperty(6)
def _get_elev_norm(self):
return self._elev_norm
def _set_elev_norm(self, value):
self._elev_norm = value if value <= 12 else 12
self._elev_raised = (value + 6) if value + 6 <= 12 else 12
self.elevation = self._elev_norm
elevation_normal = AliasProperty(_get_elev_norm, _set_elev_norm,
bind=('_elev_norm',))
# _elev_raised = NumericProperty(12)
_elev_raised = NumericProperty(6)
def _get_elev_raised(self):
return self._elev_raised
def _set_elev_raised(self, value):
self._elev_raised = value if value + self._elev_norm <= 12 else 12
elevation_raised = AliasProperty(_get_elev_raised, _set_elev_raised,
bind=('_elev_raised',))
def __init__(self, **kwargs):
if self.elevation_raised == 0 and self.elevation_normal + 6 <= 12:
self.elevation_raised = self.elevation_normal + 6
elif self.elevation_raised == 0:
self.elevation_raised = 12
super(MDFloatingActionButton, self).__init__(**kwargs)
self.elevation_press_anim = Animation(elevation=self.elevation_raised,
duration=.2, t='out_quad')
self.elevation_release_anim = Animation(
elevation=self.elevation_normal, duration=.2, t='out_quad')
def _set_ellipse(self, instance, value):
ellipse = self.ellipse
ripple_rad = self.ripple_rad
ellipse.size = (ripple_rad, ripple_rad)
ellipse.pos = (self.center_x - ripple_rad / 2.,
self.center_y - ripple_rad / 2.)
def on_disabled(self, instance, value):
super(MDFloatingActionButton, self).on_disabled(instance, value)
if self.disabled:
self.elevation = 0
else:
self.elevation = self.elevation_normal
def on_touch_down(self, touch):
if not self.disabled:
if touch.is_mouse_scrolling:
return False
if not self.collide_point(touch.x, touch.y):
return False
if self in touch.ud:
return False
self.elevation_press_anim.stop(self)
self.elevation_press_anim.start(self)
return super(MDFloatingActionButton, self).on_touch_down(touch)
def on_touch_up(self, touch):
if not self.disabled:
if touch.grab_current is not self:
return super(ButtonBehavior, self).on_touch_up(touch)
self.elevation_release_anim.stop(self)
self.elevation_release_anim.start(self)
return super(MDFloatingActionButton, self).on_touch_up(touch)
def on_elevation_normal(self, instance, value):
self.elevation = value
def on_elevation_raised(self, instance, value):
if self.elevation_raised == 0 and self.elevation_normal + 6 <= 12:
self.elevation_raised = self.elevation_normal + 6
elif self.elevation_raised == 0:
self.elevation_raised = 12