openCom-Companion/sbapp/kivymd/uix/expansionpanel/expansionpanel.py
2022-07-07 22:16:10 +02:00

462 lines
13 KiB
Python
Executable File

"""
Components/ExpansionPanel
=========================
.. seealso::
`Material Design spec, Expansion panel <https://material.io/archive/guidelines/components/expansion-panels.html#>`_
.. rubric:: Expansion panels contain creation flows and allow lightweight editing of an element.
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/expansion-panel.png
:align: center
Usage
-----
.. code-block:: python
self.add_widget(
MDExpansionPanel(
icon="logo.png", # panel icon
content=Content(), # panel content
panel_cls=MDExpansionPanelOneLine(text="Secondary text"), # panel class
)
)
To use :class:`~MDExpansionPanel` you must pass one of the following classes
to the :attr:`~MDExpansionPanel.panel_cls` parameter:
- :class:`~MDExpansionPanelOneLine`
- :class:`~MDExpansionPanelTwoLine`
- :class:`~MDExpansionPanelThreeLine`
These classes are inherited from the following classes:
- :class:`~kivymd.uix.list.OneLineAvatarIconListItem`
- :class:`~kivymd.uix.list.TwoLineAvatarIconListItem`
- :class:`~kivymd.uix.list.ThreeLineAvatarIconListItem`
.. code-block:: python
self.root.ids.box.add_widget(
MDExpansionPanel(
icon="logo.png",
content=Content(),
panel_cls=MDExpansionPanelThreeLine(
text="Text",
secondary_text="Secondary text",
tertiary_text="Tertiary text",
)
)
)
Example
-------
.. code-block:: python
from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.expansionpanel import MDExpansionPanel, MDExpansionPanelThreeLine
from kivymd import images_path
KV = '''
<Content>
adaptive_height: True
TwoLineIconListItem:
text: "(050)-123-45-67"
secondary_text: "Mobile"
IconLeftWidget:
icon: 'phone'
ScrollView:
MDGridLayout:
id: box
cols: 1
adaptive_height: True
'''
class Content(MDBoxLayout):
'''Custom content.'''
class Test(MDApp):
def build(self):
return Builder.load_string(KV)
def on_start(self):
for i in range(10):
self.root.ids.box.add_widget(
MDExpansionPanel(
icon=f"{images_path}kivymd.png",
content=Content(),
panel_cls=MDExpansionPanelThreeLine(
text="Text",
secondary_text="Secondary text",
tertiary_text="Tertiary text",
)
)
)
Test().run()
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/expansion-panel.gif
:align: center
Two events are available for :class:`~MDExpansionPanel`
-------------------------------------------------------
- :attr:`~MDExpansionPanel.on_open`
- :attr:`~MDExpansionPanel.on_close`
.. code-block:: kv
MDExpansionPanel:
on_open: app.on_panel_open(args)
on_close: app.on_panel_close(args)
The user function takes one argument - the object of the panel:
.. code-block:: python
def on_panel_open(self, instance_panel):
print(instance_panel)
.. seealso:: `See Expansion panel example <https://github.com/kivymd/KivyMD/wiki/Components-Expansion-Panel>`_
`Expansion panel and MDCard <https://github.com/kivymd/KivyMD/wiki/Components-Expansion-Panel-and-MDCard>`_
"""
__all__ = (
"MDExpansionPanel",
"MDExpansionPanelOneLine",
"MDExpansionPanelTwoLine",
"MDExpansionPanelThreeLine",
"MDExpansionPanelLabel",
)
import os
from typing import Union
from kivy.animation import Animation
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.metrics import dp
from kivy.properties import NumericProperty, ObjectProperty, StringProperty
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.widget import WidgetException
import kivymd.material_resources as m_res
from kivymd import uix_path
from kivymd.icon_definitions import md_icons
from kivymd.uix.button import MDIconButton
from kivymd.uix.list import (
IconLeftWidget,
ImageLeftWidget,
IRightBodyTouch,
OneLineAvatarIconListItem,
ThreeLineAvatarIconListItem,
TwoLineAvatarIconListItem,
TwoLineListItem,
)
with open(
os.path.join(uix_path, "expansionpanel", "expansionpanel.kv"),
encoding="utf-8",
) as kv_file:
Builder.load_string(kv_file.read())
class MDExpansionChevronRight(IRightBodyTouch, MDIconButton):
"""Chevron icon on the right panel."""
_angle = NumericProperty(0)
class MDExpansionPanelOneLine(OneLineAvatarIconListItem):
"""Single line panel."""
class MDExpansionPanelTwoLine(TwoLineAvatarIconListItem):
"""Two-line panel."""
class MDExpansionPanelThreeLine(ThreeLineAvatarIconListItem):
"""Three-line panel."""
class MDExpansionPanelLabel(TwoLineListItem):
"""
Label panel.
..warning:: This class is created for use in the
:class:`~kivymd.uix.stepper.MDStepperVertical` and
:class:`~kivymd.uix.stepper.MDStepper` classes, and has not
been tested for use outside of these classes.
"""
def __init__(self, **kwargs):
super().__init__(**kwargs)
Clock.schedule_once(self.set_paddings)
def set_paddings(self, interval: Union[int, float]) -> None:
self._txt_bot_pad = dp(36)
self._txt_left_pad = dp(0)
class MDExpansionPanel(RelativeLayout):
"""
:Events:
:attr:`on_open`
Called when a panel is opened.
:attr:`on_close`
Called when a panel is closed.
"""
content = ObjectProperty()
"""
Content of panel. Must be `Kivy` widget.
:attr:`content` is an :class:`~kivy.properties.ObjectProperty`
and defaults to `None`.
"""
icon = StringProperty()
"""
Icon of panel.
Icon Should be either be a path to an image or
a logo name in :class:`~kivymd.icon_definitions.md_icons`
:attr:`icon` is an :class:`~kivy.properties.StringProperty`
and defaults to `''`.
"""
opening_transition = StringProperty("out_cubic")
"""
The name of the animation transition type to use when animating to
the :attr:`state` `'open'`.
:attr:`opening_transition` is a :class:`~kivy.properties.StringProperty`
and defaults to `'out_cubic'`.
"""
opening_time = NumericProperty(0.2)
"""
The time taken for the panel to slide to the :attr:`state` `'open'`.
:attr:`opening_time` is a :class:`~kivy.properties.NumericProperty`
and defaults to `0.2`.
"""
closing_transition = StringProperty("out_sine")
"""
The name of the animation transition type to use when animating to
the :attr:`state` 'close'.
:attr:`closing_transition` is a :class:`~kivy.properties.StringProperty`
and defaults to `'out_sine'`.
"""
closing_time = NumericProperty(0.2)
"""
The time taken for the panel to slide to the :attr:`state` `'close'`.
:attr:`closing_time` is a :class:`~kivy.properties.NumericProperty`
and defaults to `0.2`.
"""
panel_cls = ObjectProperty()
"""
Panel object. The object must be one of the classes
:class:`~MDExpansionPanelOneLine`, :class:`~MDExpansionPanelTwoLine` or
:class:`~MDExpansionPanelThreeLine`.
:attr:`panel_cls` is a :class:`~kivy.properties.ObjectProperty`
and defaults to `None`.
"""
_state = StringProperty("close")
_anim_playing = False
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.register_event_type("on_open")
self.register_event_type("on_close")
if self.panel_cls and isinstance(
self.panel_cls,
(
MDExpansionPanelOneLine,
MDExpansionPanelTwoLine,
MDExpansionPanelThreeLine,
MDExpansionPanelLabel,
),
):
self.panel_cls.pos_hint = {"top": 1}
self.panel_cls._no_ripple_effect = True
self.panel_cls.bind(
on_release=lambda x: self.check_open_panel(self.panel_cls)
)
if not isinstance(self.panel_cls, MDExpansionPanelLabel):
self.chevron = MDExpansionChevronRight()
self.panel_cls.add_widget(self.chevron)
if self.icon:
if self.icon in md_icons.keys():
self.panel_cls.add_widget(
IconLeftWidget(
icon=self.icon,
pos_hint={"center_y": 0.5},
)
)
else:
self.panel_cls.add_widget(
ImageLeftWidget(
source=self.icon, pos_hint={"center_y": 0.5}
)
)
else:
self.panel_cls.remove_widget(
self.panel_cls.ids._left_container
)
self.panel_cls._txt_left_pad = 0
else:
# if no icon
self.panel_cls._txt_left_pad = m_res.HORIZ_MARGINS
self.add_widget(self.panel_cls)
else:
raise ValueError(
"KivyMD: `panel_cls` object must be must be one of the "
"objects from the list\n"
"[MDExpansionPanelOneLine, MDExpansionPanelTwoLine, "
"MDExpansionPanelThreeLine]"
)
def on_open(self, *args):
"""Called when a panel is opened."""
def on_close(self, *args):
"""Called when a panel is closed."""
def check_open_panel(
self,
instance_panel: [
MDExpansionPanelThreeLine,
MDExpansionPanelTwoLine,
MDExpansionPanelThreeLine,
MDExpansionPanelLabel,
],
) -> None:
"""
Called when you click on the panel. Called methods to open or close
a panel.
"""
press_current_panel = False
for panel in self.parent.children:
if isinstance(panel, MDExpansionPanel):
if len(panel.children) == 2:
if instance_panel is panel.children[1]:
press_current_panel = True
panel.remove_widget(panel.children[0])
if not isinstance(self.panel_cls, MDExpansionPanelLabel):
chevron = panel.children[0].children[0].children[0]
self.set_chevron_up(chevron)
self.close_panel(panel, press_current_panel)
self.dispatch("on_close")
break
if not press_current_panel:
self.set_chevron_down()
def set_chevron_down(self) -> None:
"""Sets the chevron down."""
if not isinstance(self.panel_cls, MDExpansionPanelLabel):
Animation(_angle=-90, d=self.opening_time).start(self.chevron)
self.open_panel()
self.dispatch("on_open")
def set_chevron_up(self, instance_chevron: MDExpansionChevronRight) -> None:
"""Sets the chevron up."""
if not isinstance(self.panel_cls, MDExpansionPanelLabel):
Animation(_angle=0, d=self.closing_time).start(instance_chevron)
def close_panel(
self, instance_expansion_panel, press_current_panel: bool
) -> None:
"""Method closes the panel."""
if self._anim_playing:
return
if press_current_panel:
self._anim_playing = True
self._state = "close"
anim = Animation(
height=self.panel_cls.height,
d=self.closing_time,
t=self.closing_transition,
)
anim.bind(on_complete=self._disable_anim)
anim.start(instance_expansion_panel)
def open_panel(self, *args) -> None:
"""Method opens a panel."""
if self._anim_playing:
return
self._anim_playing = True
self._state = "open"
anim = Animation(
height=self.content.height + self.height,
d=self.opening_time,
t=self.opening_transition,
)
anim.bind(on_complete=self._add_content)
anim.bind(on_complete=self._disable_anim)
anim.start(self)
def get_state(self) -> str:
"""Returns the state of panel. Can be `close` or `open` ."""
return self._state
def add_widget(self, widget, index=0, canvas=None):
if isinstance(
widget,
(
MDExpansionPanelOneLine,
MDExpansionPanelTwoLine,
MDExpansionPanelThreeLine,
MDExpansionPanelLabel,
),
):
self.height = widget.height
return super().add_widget(widget)
def _disable_anim(self, *args):
self._anim_playing = False
def _add_content(self, *args):
if self.content:
try:
if isinstance(self.panel_cls, MDExpansionPanelLabel):
self.content.y = dp(36)
self.add_widget(self.content)
except WidgetException:
pass