456 lines
12 KiB
Python
456 lines
12 KiB
Python
"""
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Components/Banner
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=================
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.. seealso::
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`Material Design spec, Banner <https://material.io/components/banners>`_
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.. rubric:: A banner displays a prominent message and related optional actions.
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner.png
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:align: center
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Usage
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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 kivy.factory import Factory
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from kivymd.app import MDApp
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Builder.load_string('''
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<ExampleBanner@Screen>
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MDBanner:
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id: banner
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text: ["One line string text example without actions."]
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# The widget that is under the banner.
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# It will be shifted down to the height of the banner.
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over_widget: screen
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vertical_pad: toolbar.height
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MDToolbar:
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id: toolbar
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title: "Example Banners"
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elevation: 10
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pos_hint: {'top': 1}
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BoxLayout:
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id: screen
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orientation: "vertical"
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size_hint_y: None
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height: Window.height - toolbar.height
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OneLineListItem:
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text: "Banner without actions"
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on_release: banner.show()
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Widget:
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''')
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class Test(MDApp):
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def build(self):
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return Factory.ExampleBanner()
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Test().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-example-1.gif
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:align: center
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.. rubric:: Banner type.
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By default, the banner is of the type ``'one-line'``:
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.. code-block:: kv
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MDBanner:
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text: ["One line string text example without actions."]
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-one-line.png
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:align: center
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To use a two-line banner, specify the ``'two-line'`` :attr:`MDBanner.type` for the banner
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and pass the list of two lines to the :attr:`MDBanner.text` parameter:
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.. code-block:: kv
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MDBanner:
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type: "two-line"
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text:
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["One line string text example without actions.", "This is the second line of the banner message."]
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-two-line.png
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:align: center
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Similarly, create a three-line banner:
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.. code-block:: kv
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MDBanner:
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type: "three-line"
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text:
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["One line string text example without actions.", "This is the second line of the banner message." "and this is the third line of the banner message."]
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-three-line.png
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:align: center
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To add buttons to any type of banner,
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use the :attr:`MDBanner.left_action` and :attr:`MDBanner.right_action` parameters,
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which should take a list ['Button name', function]:
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.. code-block:: kv
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MDBanner:
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text: ["One line string text example without actions."]
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left_action: ["CANCEL", lambda x: None]
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Or two buttons:
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.. code-block:: kv
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MDBanner:
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text: ["One line string text example without actions."]
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left_action: ["CANCEL", lambda x: None]
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right_action: ["CLOSE", lambda x: None]
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-actions.png
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:align: center
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If you want to use the icon on the left in the banner,
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add the prefix `'-icon'` to the banner type:
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.. code-block:: kv
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MDBanner:
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type: "one-line-icon"
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icon: f"{images_path}/kivymd.png"
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text: ["One line string text example without actions."]
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/banner-icon.png
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:align: center
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.. Note:: `See full example <https://github.com/kivymd/KivyMD/wiki/Components-Banner>`_
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"""
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__all__ = ("MDBanner",)
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from kivy.animation import Animation
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from kivy.clock import Clock
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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 (
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ListProperty,
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NumericProperty,
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ObjectProperty,
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OptionProperty,
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StringProperty,
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)
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from kivy.uix.widget import Widget
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from kivymd.uix.button import MDFlatButton
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from kivymd.uix.card import MDCard
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from kivymd.uix.list import (
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OneLineAvatarListItem,
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OneLineListItem,
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ThreeLineAvatarListItem,
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ThreeLineListItem,
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TwoLineAvatarListItem,
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TwoLineListItem,
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)
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Builder.load_string(
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"""
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#:import Window kivy.core.window.Window
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#:import Clock kivy.clock.Clock
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<ThreeLineIconBanner>
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text: root.text_message[0]
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secondary_text: root.text_message[1]
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tertiary_text: root.text_message[2]
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divider: None
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_no_ripple_effect: True
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ImageLeftWidget:
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source: root.icon
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<TwoLineIconBanner>
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text: root.text_message[0]
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secondary_text: root.text_message[1]
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divider: None
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_no_ripple_effect: True
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ImageLeftWidget:
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source: root.icon
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<OneLineIconBanner>
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text: root.text_message[0]
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divider: None
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_no_ripple_effect: True
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ImageLeftWidget:
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source: root.icon
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<ThreeLineBanner>
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text: root.text_message[0]
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secondary_text: root.text_message[1]
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tertiary_text: root.text_message[2]
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divider: None
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_no_ripple_effect: True
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<TwoLineBanner>
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text: root.text_message[0]
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secondary_text: root.text_message[1]
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divider: None
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_no_ripple_effect: True
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<OneLineBanner>
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text: root.text_message[0]
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divider: None
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_no_ripple_effect: True
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<MDBanner>
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size_hint_y: None
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height: self.minimum_height
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banner_y: 0
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orientation: "vertical"
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y: Window.height - self.banner_y
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canvas:
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Color:
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rgba: 0, 0, 0, 0
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Rectangle:
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pos: self.pos
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size: self.size
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BoxLayout:
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id: container_message
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size_hint_y: None
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height: self.minimum_height
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BoxLayout:
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size_hint: None, None
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size: self.minimum_size
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pos_hint: {"right": 1}
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padding: 0, 0, "8dp", "8dp"
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spacing: "8dp"
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BoxLayout:
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id: left_action_box
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size_hint: None, None
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size: self.minimum_size
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BoxLayout:
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id: right_action_box
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size_hint: None, None
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size: self.minimum_size
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"""
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)
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class MDBanner(MDCard):
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vertical_pad = NumericProperty(dp(68))
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"""
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Indent the banner at the top of the screen.
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:attr:`vertical_pad` is an :class:`~kivy.properties.NumericProperty`
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and defaults to `dp(68)`.
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"""
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opening_transition = StringProperty("in_quad")
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"""
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The name of the animation transition.
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:attr:`opening_transition` is an :class:`~kivy.properties.StringProperty`
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and defaults to `'in_quad'`.
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"""
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icon = StringProperty("data/logo/kivy-icon-128.png")
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"""Icon banner.
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:attr:`icon` is an :class:`~kivy.properties.StringProperty`
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and defaults to `'data/logo/kivy-icon-128.png'`.
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"""
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over_widget = ObjectProperty()
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"""
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The widget that is under the banner.
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It will be shifted down to the height of the banner.
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:attr:`over_widget` is an :class:`~kivy.properties.ObjectProperty`
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and defaults to `None`.
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"""
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text = ListProperty()
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"""List of lines for banner text.
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Must contain no more than three lines for a
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`'one-line'`, `'two-line'` and `'three-line'` banner, respectively.
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:attr:`text` is an :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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left_action = ListProperty()
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"""The action of banner.
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To add one action, make a list [`'name_action'`, callback]
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where `'name_action'` is a string that corresponds to an action name and
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``callback`` is the function called on a touch release event.
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:attr:`left_action` is an :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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right_action = ListProperty()
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"""Works the same way as :attr:`left_action`.
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:attr:`right_action` is an :class:`~kivy.properties.ListProperty`
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and defaults to `[]`.
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"""
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type = OptionProperty(
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"one-line",
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options=[
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"one-line",
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"two-line",
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"three-line",
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"one-line-icon",
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"two-line-icon",
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"three-line-icon",
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],
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allownone=True,
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)
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"""Banner type. . Available options are: (`"one-line"`, `"two-line"`,
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`"three-line"`, `"one-line-icon"`, `"two-line-icon"`, `"three-line-icon"`).
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:attr:`type` is an :class:`~kivy.properties.OptionProperty`
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and defaults to `'one-line'`.
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"""
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_type_message = None
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_progress = False
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def add_actions_buttons(self, box, data):
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if data:
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name_action_button, function_action_button = data
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action_button = MDFlatButton(
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text=f"[b]{name_action_button}[/b]",
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theme_text_color="Custom",
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text_color=self.theme_cls.primary_color,
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on_release=function_action_button,
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)
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action_button.markup = True
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box.add_widget(action_button)
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def set_left_action(self):
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self.add_actions_buttons(self.ids.left_action_box, self.left_action)
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def set_right_action(self):
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self.add_actions_buttons(self.ids.right_action_box, self.right_action)
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def set_type_banner(self):
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self._type_message = {
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"three-line-icon": ThreeLineIconBanner,
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"two-line-icon": TwoLineIconBanner,
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"one-line-icon": OneLineIconBanner,
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"three-line": ThreeLineBanner,
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"two-line": TwoLineBanner,
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"one-line": OneLineBanner,
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}[self.type]
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def add_banner_to_container(self):
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self.ids.container_message.add_widget(
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self._type_message(text_message=self.text, icon=self.icon)
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)
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def show(self):
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def show(interval):
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self.set_type_banner()
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self.set_left_action()
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self.set_right_action()
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self.add_banner_to_container()
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Clock.schedule_once(self.animation_display_banner, 0.1)
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if self._progress:
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return
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self._progress = True
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if self.ids.container_message.children:
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self.hide()
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Clock.schedule_once(show, 0.7)
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def animation_display_banner(self, i):
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Animation(
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banner_y=self.height + self.vertical_pad,
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d=0.15,
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t=self.opening_transition,
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).start(self)
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anim = Animation(
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y=self.over_widget.y - self.height,
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d=0.15,
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t=self.opening_transition,
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)
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anim.bind(on_complete=self._reset_progress)
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anim.start(self.over_widget)
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def hide(self):
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def hide(interval):
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anim = Animation(banner_y=0, d=0.15)
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anim.bind(on_complete=self._remove_banner)
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anim.start(self)
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Animation(y=self.over_widget.y + self.height, d=0.15).start(
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self.over_widget
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)
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Clock.schedule_once(hide, 0.5)
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def _remove_banner(self, *args):
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self.ids.container_message.clear_widgets()
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self.ids.left_action_box.clear_widgets()
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self.ids.right_action_box.clear_widgets()
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def _reset_progress(self, *args):
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self._progress = False
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class BaseBanner(Widget):
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text_message = ListProperty(["", "", ""])
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icon = StringProperty()
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def on_touch_down(self, touch):
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self.parent.parent.hide()
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class ThreeLineIconBanner(ThreeLineAvatarListItem, BaseBanner):
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pass
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class TwoLineIconBanner(TwoLineAvatarListItem, BaseBanner):
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pass
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class OneLineIconBanner(OneLineAvatarListItem, BaseBanner):
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pass
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class ThreeLineBanner(ThreeLineListItem, BaseBanner):
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pass
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class TwoLineBanner(TwoLineListItem, BaseBanner):
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pass
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class OneLineBanner(OneLineListItem, BaseBanner):
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pass
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