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203 lines
6.3 KiB
Python
203 lines
6.3 KiB
Python
"""
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Behaviors/ToggleButton
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======================
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This behavior must always be inherited after the button's Widget class since it
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works with the inherited properties of the button class.
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example:
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.. code-block:: python
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class MyToggleButtonWidget(MDFlatButton, MDToggleButton):
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# [...]
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pass
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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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from kivymd.uix.behaviors.toggle_behavior import MDToggleButton
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from kivymd.uix.button import MDRectangleFlatButton
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KV = '''
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Screen:
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MDBoxLayout:
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adaptive_size: True
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pos_hint: {"center_x": .5, "center_y": .5}
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MyToggleButton:
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text: "Show ads"
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group: "x"
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MyToggleButton:
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text: "Do not show ads"
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group: "x"
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MyToggleButton:
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text: "Does not matter"
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group: "x"
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'''
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class MyToggleButton(MDRectangleFlatButton, MDToggleButton):
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.background_down = self.theme_cls.primary_light
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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/toggle-button-1.gif
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:align: center
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.. code-block:: python
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class MyToggleButton(MDFillRoundFlatButton, MDToggleButton):
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def __init__(self, **kwargs):
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self.background_down = MDApp.get_running_app().theme_cls.primary_dark
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super().__init__(**kwargs)
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/toggle-button-2.gif
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:align: center
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You can inherit the ``MyToggleButton`` class only from the following classes
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----------------------------------------------------------------------------
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- :class:`~kivymd.uix.button.MDRaisedButton`
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- :class:`~kivymd.uix.button.MDFlatButton`
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- :class:`~kivymd.uix.button.MDRectangleFlatButton`
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- :class:`~kivymd.uix.button.MDRectangleFlatIconButton`
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- :class:`~kivymd.uix.button.MDRoundFlatButton`
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- :class:`~kivymd.uix.button.MDRoundFlatIconButton`
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- :class:`~kivymd.uix.button.MDFillRoundFlatButton`
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- :class:`~kivymd.uix.button.MDFillRoundFlatIconButton`
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"""
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__all__ = ("MDToggleButton",)
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from kivy.properties import BooleanProperty, ColorProperty
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from kivy.uix.behaviors import ToggleButtonBehavior
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from kivymd.uix.button import (
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MDFillRoundFlatButton,
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MDFillRoundFlatIconButton,
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MDFlatButton,
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MDRaisedButton,
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MDRectangleFlatButton,
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MDRectangleFlatIconButton,
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MDRoundFlatButton,
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MDRoundFlatIconButton,
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)
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class MDToggleButton(ToggleButtonBehavior):
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background_normal = ColorProperty(None)
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"""
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Color of the button in ``rgba`` format for the 'normal' state.
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:attr:`background_normal` is a :class:`~kivy.properties.ColorProperty`
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and is defaults to `None`.
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"""
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background_down = ColorProperty(None)
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"""
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Color of the button in ``rgba`` format for the 'down' state.
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:attr:`background_down` is a :class:`~kivy.properties.ColorProperty`
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and is defaults to `None`.
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"""
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font_color_normal = ColorProperty(None)
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"""
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Color of the font's button in ``rgba`` format for the 'normal' state.
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:attr:`font_color_normal` is a :class:`~kivy.properties.ColorProperty`
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and is defaults to `None`.
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"""
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font_color_down = ColorProperty([1, 1, 1, 1])
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"""
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Color of the font's button in ``rgba`` format for the 'down' state.
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:attr:`font_color_down` is a :class:`~kivy.properties.ColorProperty`
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and is defaults to `[1, 1, 1, 1]`.
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"""
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__is_filled = BooleanProperty(False)
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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classinfo = (
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MDRaisedButton,
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MDFlatButton,
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MDRectangleFlatButton,
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MDRectangleFlatIconButton,
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MDRoundFlatButton,
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MDRoundFlatIconButton,
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MDFillRoundFlatButton,
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MDFillRoundFlatIconButton,
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)
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# Do the object inherited from the "supported" buttons?
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if not issubclass(self.__class__, classinfo):
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raise ValueError(
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f"Class {self.__class__} must be inherited from one of the classes in the list {classinfo}"
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)
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if (
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not self.background_normal
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): # This means that if the value == [] or None will return True.
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# If the object inherits from buttons with background:
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if isinstance(
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self,
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(
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MDRaisedButton,
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MDFillRoundFlatButton,
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MDFillRoundFlatIconButton,
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),
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):
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self.__is_filled = True
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self.background_normal = self.theme_cls.primary_color
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# If not the background_normal must be the same as the inherited one:
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else:
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self.background_normal = self.md_bg_color[:]
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# If no background_down is setted:
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if (
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not self.background_down
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): # This means that if the value == [] or None will return True.
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self.background_down = (
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self.theme_cls.primary_dark
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) # get the primary_color dark from theme_cls
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if not self.font_color_normal:
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self.font_color_normal = self.theme_cls.primary_color
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# Alternative to bind the function to the property.
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# self.bind(state=self._update_bg)
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self.fbind("state", self._update_bg)
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def _update_bg(self, ins, val):
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"""Updates the color of the background."""
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if val == "down":
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self.md_bg_color = self.background_down
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if (
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self.__is_filled is False
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): # If the background is transparent, and the button it toggled,
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# the font color must be withe [1, 1, 1, 1].
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self.text_color = self.font_color_down
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if self.group:
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self._release_group(self)
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else:
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self.md_bg_color = self.background_normal
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if (
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self.__is_filled is False
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): # If the background is transparent, the font color must be the
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# primary color.
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self.text_color = self.font_color_normal
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