538 lines
15 KiB
Python
Executable file
538 lines
15 KiB
Python
Executable file
"""
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Components/Selection Controls
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=============================
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.. seealso::
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`Material Design spec, Selection controls <https://material.io/components/selection-controls>`_
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.. rubric:: Selection controls allow the user to select options.
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/selection-controll.png
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:align: center
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`KivyMD` provides the following selection controls classes for use:
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- MDCheckbox_
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- MDSwitch_
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.. MDCheckbox:
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MDCheckbox
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----------
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.. code-block:: python
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from kivy.lang import Builder
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from kivymd.app import MDApp
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KV = '''
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FloatLayout:
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MDCheckbox:
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size_hint: None, None
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size: "48dp", "48dp"
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pos_hint: {'center_x': .5, 'center_y': .5}
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'''
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class Test(MDApp):
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def build(self):
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return Builder.load_string(KV)
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Test().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/checkbox.gif
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:align: center
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.. Note:: Be sure to specify the size of the checkbox. By default, it is
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``(dp(48), dp(48))``, but the ripple effect takes up all the available
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space.
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/checkbox-no-size.gif
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:align: center
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Control state
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-------------
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.. code-block:: kv
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MDCheckbox:
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on_active: app.on_checkbox_active(*args)
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.. code-block:: python
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def on_checkbox_active(self, checkbox, value):
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if value:
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print('The checkbox', checkbox, 'is active', 'and', checkbox.state, 'state')
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else:
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print('The checkbox', checkbox, 'is inactive', 'and', checkbox.state, 'state')
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MDCheckbox with group
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---------------------
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.. code-block:: python
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from kivy.lang import Builder
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from kivymd.app import MDApp
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KV = '''
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<Check@MDCheckbox>:
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group: 'group'
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size_hint: None, None
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size: dp(48), dp(48)
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FloatLayout:
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Check:
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active: True
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pos_hint: {'center_x': .4, 'center_y': .5}
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Check:
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pos_hint: {'center_x': .6, 'center_y': .5}
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'''
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class Test(MDApp):
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def build(self):
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return Builder.load_string(KV)
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Test().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/checkbox-group.gif
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:align: center
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.. MDSwitch:
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MDSwitch
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--------
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.. code-block:: python
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from kivy.lang import Builder
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from kivymd.app import MDApp
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KV = '''
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FloatLayout:
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MDSwitch:
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pos_hint: {'center_x': .5, 'center_y': .5}
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'''
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class Test(MDApp):
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def build(self):
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return Builder.load_string(KV)
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Test().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-switch.gif
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:align: center
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.. Note:: For :class:`~MDCheckbox` size is not required. By default it is
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``(dp(36), dp(48))``, but you can increase the width if you want.
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.. code-block:: kv
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MDSwitch:
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width: dp(64)
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-switch_width.png
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:align: center
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.. Note:: Control state of :class:`~MDSwitch` same way as in
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:class:`~MDCheckbox`.
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"""
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__all__ = ("MDCheckbox", "MDSwitch")
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from kivy.animation import Animation
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from kivy.lang import Builder
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from kivy.metrics import dp, sp
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from kivy.properties import (
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AliasProperty,
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BooleanProperty,
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ListProperty,
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NumericProperty,
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StringProperty,
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)
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from kivy.uix.behaviors import ButtonBehavior, ToggleButtonBehavior
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from kivy.uix.floatlayout import FloatLayout
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from kivy.uix.widget import Widget
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from kivy.utils import get_color_from_hex
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from kivymd.color_definitions import colors
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from kivymd.theming import ThemableBehavior
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from kivymd.uix.behaviors import (
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CircularElevationBehavior,
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CircularRippleBehavior,
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)
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from kivymd.uix.label import MDIcon
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Builder.load_string(
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"""
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<MDCheckbox>
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canvas:
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Clear
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Color:
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rgba: self.color
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Rectangle:
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texture: self.texture
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size: self.texture_size
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pos:
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int(self.center_x - self.texture_size[0] / 2.),\
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int(self.center_y - self.texture_size[1] / 2.)
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color: self._current_color
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halign: 'center'
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valign: 'middle'
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<Thumb>
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color: 1, 1, 1, 1
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canvas:
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Color:
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rgba: self.color
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Ellipse:
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size: self.size
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pos: self.pos
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<MDSwitch>
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canvas.before:
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Color:
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rgba:
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self._track_color_disabled if self.disabled else\
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(self._track_color_active if self.active\
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else self._track_color_normal)
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RoundedRectangle:
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size: self.width - dp(8), dp(16)
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pos: self.x + dp(8), self.center_y - dp(8)
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radius: [dp(7)]
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on_release: thumb.trigger_action()
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Thumb:
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id: thumb
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size_hint: None, None
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size: dp(24), dp(24)
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pos: root.pos[0] + root._thumb_pos[0], root.pos[1] + root._thumb_pos[1]
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color:
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root.thumb_color_disabled if root.disabled else\
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(root.thumb_color_down if root.active else root.thumb_color)
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elevation: 4 if root.active else 2
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on_release: setattr(root, 'active', not root.active)
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"""
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)
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class MDCheckbox(CircularRippleBehavior, ToggleButtonBehavior, MDIcon):
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active = BooleanProperty(False)
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"""
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Indicates if the checkbox is active or inactive.
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:attr:`active` is a :class:`~kivy.properties.BooleanProperty`
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and defaults to `False`.
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"""
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checkbox_icon_normal = StringProperty("checkbox-blank-outline")
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"""
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Background icon of the checkbox used for the default graphical
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representation when the checkbox is not pressed.
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:attr:`checkbox_icon_normal` is a :class:`~kivy.properties.StringProperty`
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and defaults to `'checkbox-blank-outline'`.
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"""
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checkbox_icon_down = StringProperty("checkbox-marked-outline")
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"""
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Background icon of the checkbox used for the default graphical
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representation when the checkbox is pressed.
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:attr:`checkbox_icon_down` is a :class:`~kivy.properties.StringProperty`
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and defaults to `'checkbox-marked-outline'`.
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"""
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radio_icon_normal = StringProperty("checkbox-blank-circle-outline")
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"""
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Background icon (when using the ``group`` option) of the checkbox used for
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the default graphical representation when the checkbox is not pressed.
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:attr:`radio_icon_normal` is a :class:`~kivy.properties.StringProperty`
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and defaults to `'checkbox-blank-circle-outline'`.
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"""
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radio_icon_down = StringProperty("checkbox-marked-circle-outline")
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"""
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Background icon (when using the ``group`` option) of the checkbox used for
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the default graphical representation when the checkbox is pressed.
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:attr:`radio_icon_down` is a :class:`~kivy.properties.StringProperty`
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and defaults to `'checkbox-marked-circle-outline'`.
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"""
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selected_color = ListProperty()
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"""
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Selected color in ``rgba`` format.
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:attr:`selected_color` is a :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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unselected_color = ListProperty()
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"""
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Unelected color in ``rgba`` format.
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:attr:`unselected_color` is a :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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disabled_color = ListProperty()
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"""
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Disabled color in ``rgba`` format.
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:attr:`disabled_color` is a :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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_current_color = ListProperty([0.0, 0.0, 0.0, 0.0])
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def __init__(self, **kwargs):
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self.check_anim_out = Animation(font_size=0, duration=0.1, t="out_quad")
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self.check_anim_in = Animation(
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font_size=sp(24), duration=0.1, t="out_quad"
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)
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super().__init__(**kwargs)
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self.selected_color = self.theme_cls.primary_color
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self.unselected_color = self.theme_cls.secondary_text_color
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self.disabled_color = self.theme_cls.divider_color
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self._current_color = self.unselected_color
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self.check_anim_out.bind(
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on_complete=lambda *x: self.check_anim_in.start(self)
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)
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self.bind(
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checkbox_icon_normal=self.update_icon,
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checkbox_icon_down=self.update_icon,
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radio_icon_normal=self.update_icon,
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radio_icon_down=self.update_icon,
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group=self.update_icon,
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selected_color=self.update_color,
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unselected_color=self.update_color,
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disabled_color=self.update_color,
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disabled=self.update_color,
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state=self.update_color,
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)
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self.theme_cls.bind(primary_color=self.update_primary_color)
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self.update_icon()
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self.update_color()
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def update_primary_color(self, instance, value):
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self.selected_color = value
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def update_icon(self, *args):
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if self.state == "down":
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self.icon = (
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self.radio_icon_down if self.group else self.checkbox_icon_down
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)
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else:
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self.icon = (
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self.radio_icon_normal
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if self.group
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else self.checkbox_icon_normal
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)
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def update_color(self, *args):
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if self.disabled:
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self._current_color = self.disabled_color
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elif self.state == "down":
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self._current_color = self.selected_color
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else:
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self._current_color = self.unselected_color
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def on_state(self, *args):
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if self.state == "down":
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self.check_anim_in.cancel(self)
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self.check_anim_out.start(self)
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self.update_icon()
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if self.group:
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self._release_group(self)
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self.active = True
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else:
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self.check_anim_in.cancel(self)
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self.check_anim_out.start(self)
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self.update_icon()
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self.active = False
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def on_active(self, *args):
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self.state = "down" if self.active else "normal"
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class Thumb(
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CircularElevationBehavior, CircularRippleBehavior, ButtonBehavior, Widget
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):
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ripple_scale = NumericProperty(2)
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"""
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See :attr:`~kivymd.uix.behaviors.ripplebehavior.CommonRipple.ripple_scale`.
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:attr:`ripple_scale` is a :class:`~kivy.properties.NumericProperty`
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and defaults to `2`.
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"""
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def _set_ellipse(self, instance, value):
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self.ellipse.size = (self._ripple_rad, self._ripple_rad)
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if self.ellipse.size[0] > self.width * 1.5 and not self._fading_out:
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self.fade_out()
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self.ellipse.pos = (
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self.center_x - self._ripple_rad / 2.0,
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self.center_y - self._ripple_rad / 2.0,
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)
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self.stencil.pos = (
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self.center_x - (self.width * self.ripple_scale) / 2,
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self.center_y - (self.height * self.ripple_scale) / 2,
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)
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class MDSwitch(ThemableBehavior, ButtonBehavior, FloatLayout):
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active = BooleanProperty(False)
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"""
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Indicates if the switch is active or inactive.
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:attr:`active` is a :class:`~kivy.properties.BooleanProperty`
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and defaults to `False`.
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"""
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_thumb_color = ListProperty(get_color_from_hex(colors["Gray"]["50"]))
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def _get_thumb_color(self):
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return self._thumb_color
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def _set_thumb_color(self, color, alpha=None):
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if len(color) == 2:
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self._thumb_color = get_color_from_hex(colors[color[0]][color[1]])
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if alpha:
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self._thumb_color[3] = alpha
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elif len(color) == 4:
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self._thumb_color = color
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thumb_color = AliasProperty(
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_get_thumb_color, _set_thumb_color, bind=["_thumb_color"]
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)
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"""
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Get thumb color ``rgba`` format.
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:attr:`thumb_color` is an :class:`~kivy.properties.AliasProperty`
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and property is readonly.
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"""
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_thumb_color_down = ListProperty([1, 1, 1, 1])
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def _get_thumb_color_down(self):
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return self._thumb_color_down
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def _set_thumb_color_down(self, color, alpha=None):
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if len(color) == 2:
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self._thumb_color_down = get_color_from_hex(
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colors[color[0]][color[1]]
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)
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if alpha:
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self._thumb_color_down[3] = alpha
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else:
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self._thumb_color_down[3] = 1
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elif len(color) == 4:
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self._thumb_color_down = color
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_thumb_color_disabled = ListProperty(
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get_color_from_hex(colors["Gray"]["400"])
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)
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thumb_color_disabled = get_color_from_hex(colors["Gray"]["800"])
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"""
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Get thumb color disabled ``rgba`` format.
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:attr:`thumb_color_disabled` is an :class:`~kivy.properties.AliasProperty`
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and property is readonly.
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"""
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def _get_thumb_color_disabled(self):
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return self._thumb_color_disabled
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def _set_thumb_color_disabled(self, color, alpha=None):
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if len(color) == 2:
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self._thumb_color_disabled = get_color_from_hex(
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colors[color[0]][color[1]]
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)
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if alpha:
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self._thumb_color_disabled[3] = alpha
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elif len(color) == 4:
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self._thumb_color_disabled = color
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thumb_color_down = AliasProperty(
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_get_thumb_color_disabled,
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_set_thumb_color_disabled,
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bind=["_thumb_color_disabled"],
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)
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"""
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Get thumb color down ``rgba`` format.
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:attr:`thumb_color_down` is an :class:`~kivy.properties.AliasProperty`
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and property is readonly.
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"""
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_track_color_active = ListProperty()
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_track_color_normal = ListProperty()
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_track_color_disabled = ListProperty()
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_thumb_pos = ListProperty([0, 0])
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.theme_cls.bind(
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theme_style=self._set_colors,
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primary_color=self._set_colors,
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primary_palette=self._set_colors,
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)
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self.bind(active=self._update_thumb_pos)
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self._set_colors()
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self.size_hint = (None, None)
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self.size = (dp(36), dp(48))
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def _set_colors(self, *args):
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self._track_color_normal = self.theme_cls.disabled_hint_text_color
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if self.theme_cls.theme_style == "Dark":
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self._track_color_active = self.theme_cls.primary_color
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self._track_color_active[3] = 0.5
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self._track_color_disabled = get_color_from_hex("FFFFFF")
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self._track_color_disabled[3] = 0.1
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self.thumb_color = get_color_from_hex(colors["Gray"]["400"])
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self.thumb_color_down = get_color_from_hex(
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colors[self.theme_cls.primary_palette]["200"]
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)
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else:
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self._track_color_active = get_color_from_hex(
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colors[self.theme_cls.primary_palette]["200"]
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)
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self._track_color_active[3] = 0.5
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self._track_color_disabled = self.theme_cls.disabled_hint_text_color
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self.thumb_color_down = self.theme_cls.primary_color
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def _update_thumb_pos(self, *args, animation=True):
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if self.active:
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_thumb_pos = (self.width - dp(12), self.height / 2 - dp(12))
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else:
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_thumb_pos = (0, self.height / 2 - dp(12))
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Animation.cancel_all(self, "_thumb_pos")
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if animation:
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Animation(_thumb_pos=_thumb_pos, duration=0.2, t="out_quad").start(
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self
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)
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else:
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self._thumb_pos = _thumb_pos
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def on_size(self, *args):
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self._update_thumb_pos(animation=False)
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