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155 lines
4.0 KiB
Python
Executable File
155 lines
4.0 KiB
Python
Executable File
"""
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KivyToast
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=========
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.. rubric:: Implementation of toasts for desktop.
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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.toast import toast
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KV = '''
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MDScreen:
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MDTopAppBar:
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title: 'Test Toast'
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pos_hint: {'top': 1}
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left_action_items: [['menu', lambda x: x]]
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MDRaisedButton:
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text: 'TEST KIVY TOAST'
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pos_hint: {'center_x': .5, 'center_y': .5}
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on_release: app.show_toast()
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'''
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class Test(MDApp):
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def show_toast(self):
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'''Displays a toast on the screen.'''
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toast('Test Kivy Toast')
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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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"""
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from typing import List
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from kivy.animation import Animation
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from kivy.clock import Clock
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from kivy.core.window import Window
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from kivy.lang import Builder
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from kivy.metrics import dp
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from kivy.properties import ListProperty, NumericProperty
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from kivy.uix.label import Label
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from kivymd.uix.dialog import BaseDialog
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Builder.load_string(
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"""
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<Toast>:
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size_hint: (None, None)
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pos_hint: {"center_x": 0.5, "center_y": 0.1}
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opacity: 0
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auto_dismiss: True
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overlay_color: [0, 0, 0, 0]
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canvas:
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Color:
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rgba: root._md_bg_color
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RoundedRectangle:
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pos: self.pos
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size: self.size
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radius: root.radius
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"""
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)
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class Toast(BaseDialog):
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duration = NumericProperty(2.5)
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"""
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The amount of time (in seconds) that the toast is visible on the screen.
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:attr:`duration` is an :class:`~kivy.properties.NumericProperty`
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and defaults to `2.5`.
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"""
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_md_bg_color = ListProperty()
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.label_toast = Label(size_hint=(None, None), markup=True, opacity=0)
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self.label_toast.bind(texture_size=self.label_check_texture_size)
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self.add_widget(self.label_toast)
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def label_check_texture_size(
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self, instance_label: Label, texture_size: List[int]
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) -> None:
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"""
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Resizes the text if the text texture is larger than the screen size.
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Sets the size of the toast according to the texture size of the toast
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text.
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"""
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texture_width, texture_height = texture_size
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if texture_width > Window.width:
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instance_label.text_size = (Window.width - dp(10), None)
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instance_label.texture_update()
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texture_width, texture_height = instance_label.texture_size
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self.size = (texture_width + 25, texture_height + 25)
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def toast(self, text_toast: str) -> None:
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"""Displays a toast."""
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self.label_toast.text = text_toast
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self.open()
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def on_open(self) -> None:
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"""Default open event handler."""
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self.fade_in()
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Clock.schedule_once(self.fade_out, self.duration)
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def fade_in(self) -> None:
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"""Animation of opening toast on the screen."""
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anim = Animation(opacity=1, duration=0.4)
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anim.start(self.label_toast)
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anim.start(self)
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def fade_out(self, *args) -> None:
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"""Animation of hiding toast on the screen."""
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anim = Animation(opacity=0, duration=0.4)
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anim.bind(on_complete=lambda *x: self.dismiss())
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anim.start(self.label_toast)
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anim.start(self)
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def on_touch_down(self, touch):
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if not self.collide_point(*touch.pos):
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if self.auto_dismiss:
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self.fade_out()
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return False
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super().on_touch_down(touch)
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return True
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def toast(
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text: str = "", background: list = None, duration: float = 2.5
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) -> None:
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"""
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Displays a toast.
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:param text: text to be displayed in the toast;
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:param duration: the amount of time (in seconds) that the toast is visible on the screen
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:param background: toast background color in ``rgba`` format;
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"""
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if background is None:
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background = [0.2, 0.2, 0.2, 1]
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Toast(duration=duration, _md_bg_color=background).toast(text)
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