532 lines
16 KiB
Python
532 lines
16 KiB
Python
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# -*- coding: utf-8 -*-
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'''
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Lists
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=====
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`Material Design spec, Lists page <https://www.google.com/design/spec/components/lists.html>`_
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`Material Design spec, Lists: Controls page <https://www.google.com/design/spec/components/lists-controls.html>`_
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The class :class:`MDList` in combination with a ListItem like
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:class:`OneLineListItem` will create a list that expands as items are added to
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it, working nicely with Kivy's :class:`~kivy.uix.scrollview.ScrollView`.
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Simple examples
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---------------
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Kv Lang:
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.. code-block:: python
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ScrollView:
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do_scroll_x: False # Important for MD compliance
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MDList:
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OneLineListItem:
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text: "Single-line item"
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TwoLineListItem:
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text: "Two-line item"
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secondary_text: "Secondary text here"
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ThreeLineListItem:
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text: "Three-line item"
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secondary_text: "This is a multi-line label where you can fit more text than usual"
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Python:
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.. code-block:: python
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# Sets up ScrollView with MDList, as normally used in Android:
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sv = ScrollView()
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ml = MDList()
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sv.add_widget(ml)
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contacts = ["Paula", "John", "Kate", "Vlad"]
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for c in contacts:
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ml.add_widget(
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OneLineListItem(
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text=c
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)
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)
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Advanced usage
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--------------
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Due to the variety in sizes and controls in the MD spec, this module suffers
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from a certain level of complexity to keep the widgets compliant, flexible
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and performant.
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For this KivyMD provides ListItems that try to cover the most common usecases,
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when those are insufficient, there's a base class called :class:`ListItem`
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which you can use to create your own ListItems. This documentation will only
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cover the provided ones, for custom implementations please refer to this
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module's source code.
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Text only ListItems
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-------------------
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- :class:`~OneLineListItem`
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- :class:`~TwoLineListItem`
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- :class:`~ThreeLineListItem`
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These are the simplest ones. The :attr:`~ListItem.text` attribute changes the
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text in the most prominent line, while :attr:`~ListItem.secondary_text`
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changes the second and third line.
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If there are only two lines, :attr:`~ListItem.secondary_text` will shorten
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the text to fit in case it is too long; if a third line is available, it will
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instead wrap the text to make use of it.
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ListItems with widget containers
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--------------------------------
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- :class:`~OneLineAvatarListItem`
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- :class:`~TwoLineAvatarListItem`
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- :class:`~ThreeLineAvatarListItem`
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- :class:`~OneLineIconListItem`
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- :class:`~TwoLineIconListItem`
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- :class:`~ThreeLineIconListItem`
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- :class:`~OneLineAvatarIconListItem`
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- :class:`~TwoLineAvatarIconListItem`
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- :class:`~ThreeLineAvatarIconListItem`
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These widgets will take other widgets that inherit from :class:`~ILeftBody`,
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:class:`ILeftBodyTouch`, :class:`~IRightBody` or :class:`~IRightBodyTouch` and
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put them in their corresponding container.
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As the name implies, :class:`~ILeftBody` and :class:`~IRightBody` will signal
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that the widget goes into the left or right container, respectively.
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:class:`~ILeftBodyTouch` and :class:`~IRightBodyTouch` do the same thing,
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except these widgets will also receive touch events that occur within their
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surfaces.
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Python example:
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.. code-block:: python
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class ContactPhoto(ILeftBody, AsyncImage):
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pass
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class MessageButton(IRightBodyTouch, MDIconButton):
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phone_number = StringProperty()
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def on_release(self):
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# sample code:
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Dialer.send_sms(phone_number, "Hey! What's up?")
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pass
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# Sets up ScrollView with MDList, as normally used in Android:
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sv = ScrollView()
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ml = MDList()
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sv.add_widget(ml)
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contacts = [
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["Annie", "555-24235", "http://myphotos.com/annie.png"],
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["Bob", "555-15423", "http://myphotos.com/bob.png"],
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["Claire", "555-66098", "http://myphotos.com/claire.png"]
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]
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for c in contacts:
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item = TwoLineAvatarIconListItem(
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text=c[0],
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secondary_text=c[1]
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)
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item.add_widget(ContactPhoto(source=c[2]))
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item.add_widget(MessageButton(phone_number=c[1])
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ml.add_widget(item)
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API
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---
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'''
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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 ObjectProperty, StringProperty, NumericProperty, \
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ListProperty, OptionProperty
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from kivy.uix.behaviors import ButtonBehavior
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from kivy.uix.floatlayout import FloatLayout
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from kivy.uix.gridlayout import GridLayout
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import kivymd.material_resources as m_res
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from kivymd.ripplebehavior import RectangularRippleBehavior
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from kivymd.theming import ThemableBehavior
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Builder.load_string('''
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#:import m_res kivymd.material_resources
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<MDList>
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cols: 1
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size_hint_y: None
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height: self._min_list_height
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padding: 0, self._list_vertical_padding
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<BaseListItem>
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size_hint_y: None
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canvas:
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Color:
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rgba: self.theme_cls.divider_color
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Line:
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points: root.x,root.y, root.x+self.width,root.y
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BoxLayout:
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id: _text_container
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orientation: 'vertical'
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pos: root.pos
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padding: root._txt_left_pad, root._txt_top_pad, root._txt_right_pad, root._txt_bot_pad
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MDLabel:
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id: _lbl_primary
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text: root.text
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font_style: root.font_style
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theme_text_color: root.theme_text_color
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text_color: root.text_color
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size_hint_y: None
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height: self.texture_size[1]
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MDLabel:
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id: _lbl_secondary
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text: '' if root._num_lines == 1 else root.secondary_text
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font_style: root.secondary_font_style
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theme_text_color: root.secondary_theme_text_color
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text_color: root.secondary_text_color
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size_hint_y: None
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height: 0 if root._num_lines == 1 else self.texture_size[1]
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shorten: True if root._num_lines == 2 else False
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<OneLineAvatarListItem>
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BoxLayout:
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id: _left_container
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size_hint: None, None
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x: root.x + dp(16)
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y: root.y + root.height/2 - self.height/2
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size: dp(40), dp(40)
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<ThreeLineAvatarListItem>
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BoxLayout:
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id: _left_container
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size_hint: None, None
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x: root.x + dp(16)
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y: root.y + root.height - root._txt_top_pad - self.height - dp(5)
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size: dp(40), dp(40)
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<OneLineIconListItem>
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BoxLayout:
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id: _left_container
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size_hint: None, None
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x: root.x + dp(16)
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y: root.y + root.height/2 - self.height/2
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size: dp(48), dp(48)
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<ThreeLineIconListItem>
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BoxLayout:
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id: _left_container
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size_hint: None, None
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x: root.x + dp(16)
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y: root.y + root.height - root._txt_top_pad - self.height - dp(5)
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size: dp(48), dp(48)
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<OneLineRightIconListItem>
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BoxLayout:
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id: _right_container
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size_hint: None, None
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x: root.x + root.width - m_res.HORIZ_MARGINS - self.width
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y: root.y + root.height/2 - self.height/2
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size: dp(48), dp(48)
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<ThreeLineRightIconListItem>
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BoxLayout:
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id: _right_container
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size_hint: None, None
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x: root.x + root.width - m_res.HORIZ_MARGINS - self.width
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y: root.y + root.height/2 - self.height/2
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size: dp(48), dp(48)
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<OneLineAvatarIconListItem>
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BoxLayout:
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id: _right_container
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size_hint: None, None
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x: root.x + root.width - m_res.HORIZ_MARGINS - self.width
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y: root.y + root.height/2 - self.height/2
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size: dp(48), dp(48)
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<TwoLineAvatarIconListItem>
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BoxLayout:
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id: _right_container
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size_hint: None, None
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x: root.x + root.width - m_res.HORIZ_MARGINS - self.width
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y: root.y + root.height/2 - self.height/2
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size: dp(48), dp(48)
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<ThreeLineAvatarIconListItem>
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BoxLayout:
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id: _right_container
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size_hint: None, None
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x: root.x + root.width - m_res.HORIZ_MARGINS - self.width
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y: root.y + root.height - root._txt_top_pad - self.height - dp(5)
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size: dp(48), dp(48)
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''')
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class MDList(GridLayout):
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'''ListItem container. Best used in conjunction with a
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:class:`kivy.uix.ScrollView`.
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When adding (or removing) a widget, it will resize itself to fit its
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children, plus top and bottom paddings as described by the MD spec.
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'''
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selected = ObjectProperty()
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_min_list_height = dp(16)
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_list_vertical_padding = dp(8)
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icon = StringProperty()
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def add_widget(self, widget, index=0):
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super(MDList, self).add_widget(widget, index)
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self.height += widget.height
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def remove_widget(self, widget):
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super(MDList, self).remove_widget(widget)
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self.height -= widget.height
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class BaseListItem(ThemableBehavior, RectangularRippleBehavior,
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ButtonBehavior, FloatLayout):
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'''Base class to all ListItems. Not supposed to be instantiated on its own.
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'''
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text = StringProperty()
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'''Text shown in the first line.
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:attr:`text` is a :class:`~kivy.properties.StringProperty` and defaults
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to "".
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'''
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text_color = ListProperty(None)
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''' Text color used if theme_text_color is set to 'Custom' '''
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font_style = OptionProperty(
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'Subhead', options=['Body1', 'Body2', 'Caption', 'Subhead', 'Title',
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'Headline', 'Display1', 'Display2', 'Display3',
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'Display4', 'Button', 'Icon'])
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theme_text_color = StringProperty('Primary',allownone=True)
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''' Theme text color for primary text '''
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secondary_text = StringProperty()
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'''Text shown in the second and potentially third line.
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The text will wrap into the third line if the ListItem's type is set to
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\'one-line\'. It can be forced into the third line by adding a \\n
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escape sequence.
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:attr:`secondary_text` is a :class:`~kivy.properties.StringProperty` and
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defaults to "".
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'''
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secondary_text_color = ListProperty(None)
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''' Text color used for secondary text if secondary_theme_text_color
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is set to 'Custom' '''
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secondary_theme_text_color = StringProperty('Secondary',allownone=True)
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''' Theme text color for secondary primary text '''
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secondary_font_style = OptionProperty(
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'Body1', options=['Body1', 'Body2', 'Caption', 'Subhead', 'Title',
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'Headline', 'Display1', 'Display2', 'Display3',
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'Display4', 'Button', 'Icon'])
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_txt_left_pad = NumericProperty(dp(16))
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_txt_top_pad = NumericProperty()
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_txt_bot_pad = NumericProperty()
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_txt_right_pad = NumericProperty(m_res.HORIZ_MARGINS)
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_num_lines = 2
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class ILeftBody:
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'''Pseudo-interface for widgets that go in the left container for
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ListItems that support it.
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Implements nothing and requires no implementation, for annotation only.
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'''
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pass
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class ILeftBodyTouch:
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'''Same as :class:`~ILeftBody`, but allows the widget to receive touch
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events instead of triggering the ListItem's ripple effect
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'''
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pass
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class IRightBody:
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'''Pseudo-interface for widgets that go in the right container for
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ListItems that support it.
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Implements nothing and requires no implementation, for annotation only.
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'''
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pass
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class IRightBodyTouch:
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'''Same as :class:`~IRightBody`, but allows the widget to receive touch
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events instead of triggering the ListItem's ripple effect
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'''
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pass
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class ContainerSupport:
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'''Overrides add_widget in a ListItem to include support for I*Body
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widgets when the appropiate containers are present.
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'''
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_touchable_widgets = ListProperty()
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def add_widget(self, widget, index=0):
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if issubclass(widget.__class__, ILeftBody):
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self.ids['_left_container'].add_widget(widget)
|
||
|
|
elif issubclass(widget.__class__, ILeftBodyTouch):
|
||
|
|
self.ids['_left_container'].add_widget(widget)
|
||
|
|
self._touchable_widgets.append(widget)
|
||
|
|
elif issubclass(widget.__class__, IRightBody):
|
||
|
|
self.ids['_right_container'].add_widget(widget)
|
||
|
|
elif issubclass(widget.__class__, IRightBodyTouch):
|
||
|
|
self.ids['_right_container'].add_widget(widget)
|
||
|
|
self._touchable_widgets.append(widget)
|
||
|
|
else:
|
||
|
|
return super(BaseListItem, self).add_widget(widget,index)
|
||
|
|
|
||
|
|
def remove_widget(self, widget):
|
||
|
|
super(BaseListItem, self).remove_widget(widget)
|
||
|
|
if widget in self._touchable_widgets:
|
||
|
|
self._touchable_widgets.remove(widget)
|
||
|
|
|
||
|
|
def on_touch_down(self, touch):
|
||
|
|
if self.propagate_touch_to_touchable_widgets(touch, 'down'):
|
||
|
|
return
|
||
|
|
super(BaseListItem, self).on_touch_down(touch)
|
||
|
|
|
||
|
|
def on_touch_move(self, touch, *args):
|
||
|
|
if self.propagate_touch_to_touchable_widgets(touch, 'move', *args):
|
||
|
|
return
|
||
|
|
super(BaseListItem, self).on_touch_move(touch, *args)
|
||
|
|
|
||
|
|
def on_touch_up(self, touch):
|
||
|
|
if self.propagate_touch_to_touchable_widgets(touch, 'up'):
|
||
|
|
return
|
||
|
|
super(BaseListItem, self).on_touch_up(touch)
|
||
|
|
|
||
|
|
def propagate_touch_to_touchable_widgets(self, touch, touch_event, *args):
|
||
|
|
triggered = False
|
||
|
|
for i in self._touchable_widgets:
|
||
|
|
if i.collide_point(touch.x, touch.y):
|
||
|
|
triggered = True
|
||
|
|
if touch_event == 'down':
|
||
|
|
i.on_touch_down(touch)
|
||
|
|
elif touch_event == 'move':
|
||
|
|
i.on_touch_move(touch, *args)
|
||
|
|
elif touch_event == 'up':
|
||
|
|
i.on_touch_up(touch)
|
||
|
|
return triggered
|
||
|
|
|
||
|
|
|
||
|
|
class OneLineListItem(BaseListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(16))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
_num_lines = 1
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(OneLineListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(48)
|
||
|
|
|
||
|
|
|
||
|
|
class TwoLineListItem(BaseListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(20))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(TwoLineListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(72)
|
||
|
|
|
||
|
|
|
||
|
|
class ThreeLineListItem(BaseListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(16))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
_num_lines = 3
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(ThreeLineListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(88)
|
||
|
|
|
||
|
|
|
||
|
|
class OneLineAvatarListItem(ContainerSupport, BaseListItem):
|
||
|
|
_txt_left_pad = NumericProperty(dp(72))
|
||
|
|
_txt_top_pad = NumericProperty(dp(20))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(19)) # dp(24) - dp(5)
|
||
|
|
_num_lines = 1
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(OneLineAvatarListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(56)
|
||
|
|
|
||
|
|
|
||
|
|
class TwoLineAvatarListItem(OneLineAvatarListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(20))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
_num_lines = 2
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(BaseListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(72)
|
||
|
|
|
||
|
|
|
||
|
|
class ThreeLineAvatarListItem(ContainerSupport, ThreeLineListItem):
|
||
|
|
_txt_left_pad = NumericProperty(dp(72))
|
||
|
|
|
||
|
|
|
||
|
|
class OneLineIconListItem(ContainerSupport, OneLineListItem):
|
||
|
|
_txt_left_pad = NumericProperty(dp(72))
|
||
|
|
|
||
|
|
|
||
|
|
class TwoLineIconListItem(OneLineIconListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(20))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
_num_lines = 2
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(BaseListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(72)
|
||
|
|
|
||
|
|
|
||
|
|
class ThreeLineIconListItem(ContainerSupport, ThreeLineListItem):
|
||
|
|
_txt_left_pad = NumericProperty(dp(72))
|
||
|
|
|
||
|
|
|
||
|
|
class OneLineRightIconListItem(ContainerSupport, OneLineListItem):
|
||
|
|
# dp(40) = dp(16) + dp(24):
|
||
|
|
_txt_right_pad = NumericProperty(dp(40) + m_res.HORIZ_MARGINS)
|
||
|
|
|
||
|
|
|
||
|
|
class TwoLineRightIconListItem(OneLineRightIconListItem):
|
||
|
|
_txt_top_pad = NumericProperty(dp(20))
|
||
|
|
_txt_bot_pad = NumericProperty(dp(15)) # dp(20) - dp(5)
|
||
|
|
_num_lines = 2
|
||
|
|
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
super(BaseListItem, self).__init__(**kwargs)
|
||
|
|
self.height = dp(72)
|
||
|
|
|
||
|
|
|
||
|
|
class ThreeLineRightIconListitem(ContainerSupport, ThreeLineListItem):
|
||
|
|
# dp(40) = dp(16) + dp(24):
|
||
|
|
_txt_right_pad = NumericProperty(dp(40) + m_res.HORIZ_MARGINS)
|
||
|
|
|
||
|
|
|
||
|
|
class OneLineAvatarIconListItem(OneLineAvatarListItem):
|
||
|
|
# dp(40) = dp(16) + dp(24):
|
||
|
|
_txt_right_pad = NumericProperty(dp(40) + m_res.HORIZ_MARGINS)
|
||
|
|
|
||
|
|
|
||
|
|
class TwoLineAvatarIconListItem(TwoLineAvatarListItem):
|
||
|
|
# dp(40) = dp(16) + dp(24):
|
||
|
|
_txt_right_pad = NumericProperty(dp(40) + m_res.HORIZ_MARGINS)
|
||
|
|
|
||
|
|
|
||
|
|
class ThreeLineAvatarIconListItem(ThreeLineAvatarListItem):
|
||
|
|
# dp(40) = dp(16) + dp(24):
|
||
|
|
_txt_right_pad = NumericProperty(dp(40) + m_res.HORIZ_MARGINS)
|