466 lines
12 KiB
Python
Executable File
466 lines
12 KiB
Python
Executable File
"""
|
|
Components/Label
|
|
================
|
|
|
|
.. rubric:: The :class:`MDLabel` widget is for rendering text.
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/label.png
|
|
:align: center
|
|
|
|
- MDLabel_
|
|
- MDIcon_
|
|
|
|
.. MDLabel:
|
|
MDLabel
|
|
-------
|
|
|
|
Class :class:`MDLabel` inherited from the :class:`~kivy.uix.label.Label` class
|
|
but for :class:`MDLabel` the ``text_size`` parameter is ``(self.width, None)``
|
|
and default is positioned on the left:
|
|
|
|
.. code-block:: python
|
|
|
|
from kivy.lang import Builder
|
|
|
|
from kivymd.app import MDApp
|
|
|
|
KV = '''
|
|
MDScreen:
|
|
|
|
MDBoxLayout:
|
|
orientation: "vertical"
|
|
|
|
MDTopAppBar:
|
|
title: "MDLabel"
|
|
|
|
MDLabel:
|
|
text: "MDLabel"
|
|
'''
|
|
|
|
|
|
class Test(MDApp):
|
|
def build(self):
|
|
return Builder.load_string(KV)
|
|
|
|
|
|
Test().run()
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-label-to-left.png
|
|
:align: center
|
|
|
|
.. Note:: See :attr:`~kivy.uix.label.Label.halign`
|
|
and :attr:`~kivy.uix.label.Label.valign` attributes
|
|
of the :class:`~kivy.uix.label.Label` class
|
|
|
|
.. code-block:: kv
|
|
|
|
MDLabel:
|
|
text: "MDLabel"
|
|
halign: "center"
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-label-to-center.png
|
|
:align: center
|
|
|
|
:class:`~MDLabel` color:
|
|
------------------------
|
|
|
|
:class:`~MDLabel` provides standard color themes for label color management:
|
|
|
|
.. code-block:: python
|
|
|
|
from kivy.lang import Builder
|
|
|
|
from kivymd.app import MDApp
|
|
from kivymd.uix.label import MDLabel
|
|
|
|
KV = '''
|
|
MDScreen:
|
|
|
|
MDBoxLayout:
|
|
id: box
|
|
orientation: "vertical"
|
|
|
|
MDTopAppBar:
|
|
title: "MDLabel"
|
|
'''
|
|
|
|
|
|
class Test(MDApp):
|
|
def build(self):
|
|
screen = Builder.load_string(KV)
|
|
# Names of standard color themes.
|
|
for name_theme in [
|
|
"Primary",
|
|
"Secondary",
|
|
"Hint",
|
|
"Error",
|
|
"ContrastParentBackground",
|
|
]:
|
|
screen.ids.box.add_widget(
|
|
MDLabel(
|
|
text=name_theme,
|
|
halign="center",
|
|
theme_text_color=name_theme,
|
|
)
|
|
)
|
|
return screen
|
|
|
|
|
|
Test().run()
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-label-theme-text-color.png
|
|
:align: center
|
|
|
|
To use a custom color for :class:`~MDLabel`, use a theme `'Custom'`.
|
|
After that, you can specify the desired color in the ``rgba`` format
|
|
in the ``text_color`` parameter:
|
|
|
|
.. code-block:: kv
|
|
|
|
MDLabel:
|
|
text: "Custom color"
|
|
halign: "center"
|
|
theme_text_color: "Custom"
|
|
text_color: 0, 0, 1, 1
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-label-custom-color.png
|
|
:align: center
|
|
|
|
:class:`~MDLabel` provides standard font styles for labels. To do this,
|
|
specify the name of the desired style in the :attr:`~MDLabel.font_style`
|
|
parameter:
|
|
|
|
.. code-block:: python
|
|
|
|
from kivy.lang import Builder
|
|
|
|
from kivymd.app import MDApp
|
|
from kivymd.uix.label import MDLabel
|
|
from kivymd.font_definitions import theme_font_styles
|
|
|
|
|
|
KV = '''
|
|
MDScreen:
|
|
|
|
MDBoxLayout:
|
|
orientation: "vertical"
|
|
|
|
MDTopAppBar:
|
|
title: "MDLabel"
|
|
|
|
ScrollView:
|
|
|
|
MDList:
|
|
id: box
|
|
'''
|
|
|
|
|
|
class Test(MDApp):
|
|
def build(self):
|
|
screen = Builder.load_string(KV)
|
|
# Names of standard font styles.
|
|
for name_style in theme_font_styles[:-1]:
|
|
screen.ids.box.add_widget(
|
|
MDLabel(
|
|
text=f"{name_style} style",
|
|
halign="center",
|
|
font_style=name_style,
|
|
)
|
|
)
|
|
return screen
|
|
|
|
|
|
Test().run()
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-label-font-style.gif
|
|
:align: center
|
|
|
|
.. MDIcon:
|
|
MDIcon
|
|
-------
|
|
|
|
You can use labels to display material design icons using the
|
|
:class:`~MDIcon` class.
|
|
|
|
.. seealso::
|
|
|
|
`Material Design Icons <https://materialdesignicons.com/>`_
|
|
|
|
`Material Design Icon Names <https://github.com/kivymd/KivyMD/blob/master/kivymd/icon_definitions.py>`_
|
|
|
|
The :class:`~MDIcon` class is inherited from
|
|
:class:`~MDLabel` and has the same parameters.
|
|
|
|
.. Warning:: For the :class:`~MDIcon` class, you cannot use ``text``
|
|
and ``font_style`` options!
|
|
|
|
.. code-block:: kv
|
|
|
|
MDIcon:
|
|
icon: "gmail"
|
|
pos_hint: {"center_x": .5, "center_y": .5}
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-icon.png
|
|
:align: center
|
|
|
|
MDIcon with badge icon
|
|
----------------------
|
|
|
|
.. code-block:: kv
|
|
|
|
MDIcon:
|
|
icon: "gmail"
|
|
badge_icon: "numeric-10"
|
|
pos_hint: {"center_x": .5, "center_y": .5}
|
|
|
|
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-icon-badge.png
|
|
:align: center
|
|
"""
|
|
|
|
__all__ = ("MDLabel", "MDIcon")
|
|
|
|
import os
|
|
from typing import Union
|
|
|
|
from kivy.clock import Clock
|
|
from kivy.lang import Builder
|
|
from kivy.metrics import sp
|
|
from kivy.properties import (
|
|
AliasProperty,
|
|
BooleanProperty,
|
|
ColorProperty,
|
|
NumericProperty,
|
|
OptionProperty,
|
|
StringProperty,
|
|
)
|
|
from kivy.uix.label import Label
|
|
|
|
from kivymd import uix_path
|
|
from kivymd.theming import ThemableBehavior
|
|
from kivymd.theming_dynamic_text import get_contrast_text_color
|
|
from kivymd.uix import MDAdaptiveWidget
|
|
from kivymd.uix.floatlayout import MDFloatLayout
|
|
|
|
__MDLabel_colors__ = {
|
|
"Primary": "text_color",
|
|
"Secondary": "secondary_text_color",
|
|
"Hint": "disabled_hint_text_color",
|
|
"Error": "error_color",
|
|
"OP": {
|
|
"Primary": "opposite_text_color",
|
|
"Secondary": "opposite_secondary_text_color",
|
|
"Hint": "opposite_disabled_hint_text_color",
|
|
},
|
|
}
|
|
|
|
with open(
|
|
os.path.join(uix_path, "label", "label.kv"), encoding="utf-8"
|
|
) as kv_file:
|
|
Builder.load_string(kv_file.read())
|
|
|
|
|
|
class MDLabel(ThemableBehavior, Label, MDAdaptiveWidget):
|
|
font_style = StringProperty("Body1")
|
|
"""
|
|
Label font style.
|
|
|
|
Available vanilla font_style are: `'H1'`, `'H2'`, `'H3'`, `'H4'`, `'H5'`,
|
|
`'H6'`, `'Subtitle1'`, `'Subtitle2'`, `'Body1'`, `'Body2'`, `'Button'`,
|
|
`'Caption'`, `'Overline'`, `'Icon'`.
|
|
|
|
:attr:`font_style` is an :class:`~kivy.properties.StringProperty`
|
|
and defaults to `'Body1'`.
|
|
"""
|
|
|
|
_capitalizing = BooleanProperty(False)
|
|
|
|
def _get_text(self):
|
|
if self._capitalizing:
|
|
return self._text.upper()
|
|
return self._text
|
|
|
|
def _set_text(self, value):
|
|
self._text = value
|
|
|
|
_text = StringProperty()
|
|
|
|
text = AliasProperty(_get_text, _set_text, bind=["_text", "_capitalizing"])
|
|
"""Text of the label."""
|
|
|
|
theme_text_color = OptionProperty(
|
|
"Primary",
|
|
allownone=True,
|
|
options=[
|
|
"Primary",
|
|
"Secondary",
|
|
"Hint",
|
|
"Error",
|
|
"Custom",
|
|
"ContrastParentBackground",
|
|
],
|
|
)
|
|
"""
|
|
Label color scheme name.
|
|
|
|
Available options are: `'Primary'`, `'Secondary'`, `'Hint'`, `'Error'`,
|
|
`'Custom'`, `'ContrastParentBackground'`.
|
|
|
|
:attr:`theme_text_color` is an :class:`~kivy.properties.OptionProperty`
|
|
and defaults to `None`.
|
|
"""
|
|
|
|
text_color = ColorProperty(None)
|
|
"""
|
|
Label text color in (r, g, b, a) format.
|
|
|
|
:attr:`text_color` is an :class:`~kivy.properties.ColorProperty`
|
|
and defaults to `None`.
|
|
"""
|
|
|
|
_text_color_str = StringProperty()
|
|
|
|
parent_background = ColorProperty(None)
|
|
can_capitalize = BooleanProperty(True)
|
|
|
|
def __init__(self, **kwargs):
|
|
super().__init__(**kwargs)
|
|
self.bind(
|
|
font_style=self.update_font_style,
|
|
can_capitalize=self.update_font_style,
|
|
)
|
|
self.on_theme_text_color(None, self.theme_text_color)
|
|
self.update_font_style(None, "")
|
|
self.on_opposite_colors(None, self.opposite_colors)
|
|
Clock.schedule_once(self.check_font_styles)
|
|
self.theme_cls.bind(theme_style=self._do_update_theme_color)
|
|
|
|
def check_font_styles(self, interval: Union[int, float] = 0) -> bool:
|
|
if self.font_style not in list(self.theme_cls.font_styles.keys()):
|
|
raise ValueError(
|
|
f"MDLabel.font_style is set to an invalid option '{self.font_style}'."
|
|
f"Must be one of: {list(self.theme_cls.font_styles)}"
|
|
)
|
|
else:
|
|
return True
|
|
|
|
def update_font_style(self, instance_label, font_style: str) -> None:
|
|
if self.check_font_styles() is True:
|
|
font_info = self.theme_cls.font_styles[self.font_style]
|
|
self.font_name = font_info[0]
|
|
self.font_size = sp(font_info[1])
|
|
if font_info[2] and self.can_capitalize:
|
|
self._capitalizing = True
|
|
else:
|
|
self._capitalizing = False
|
|
|
|
# TODO: Add letter spacing change
|
|
# self.letter_spacing = font_info[3]
|
|
|
|
def on_theme_text_color(
|
|
self, instance_label, theme_text_color: str
|
|
) -> None:
|
|
op = self.opposite_colors
|
|
if op:
|
|
self._text_color_str = __MDLabel_colors__.get("OP", "").get(
|
|
theme_text_color, ""
|
|
)
|
|
else:
|
|
self._text_color_str = __MDLabel_colors__.get(theme_text_color, "")
|
|
if self._text_color_str:
|
|
self._do_update_theme_color()
|
|
else:
|
|
# 'Custom' and 'ContrastParentBackground' lead here, as well as the
|
|
# generic None value it's not yet been set
|
|
self._text_color_str = ""
|
|
if theme_text_color == "Custom" and self.text_color:
|
|
self.color = self.text_color
|
|
elif (
|
|
theme_text_color == "ContrastParentBackground"
|
|
and self.parent_background
|
|
):
|
|
self.color = get_contrast_text_color(self.parent_background)
|
|
else:
|
|
self.color = [0, 0, 0, 1]
|
|
|
|
def on_text_color(self, instance_label, color: list) -> None:
|
|
if self.theme_text_color == "Custom":
|
|
self.color = self.text_color
|
|
|
|
def on_opposite_colors(self, *args) -> None:
|
|
self.on_theme_text_color(self, self.theme_text_color)
|
|
|
|
def _do_update_theme_color(self, *args):
|
|
if self._text_color_str:
|
|
self.color = getattr(self.theme_cls, self._text_color_str)
|
|
if not self.disabled:
|
|
self.color = getattr(self.theme_cls, self._text_color_str)
|
|
else:
|
|
self.color = getattr(self.theme_cls, "disabled_hint_text_color")
|
|
|
|
|
|
class MDIcon(MDFloatLayout, MDLabel):
|
|
icon = StringProperty("android")
|
|
"""
|
|
Label icon name.
|
|
|
|
:attr:`icon` is an :class:`~kivy.properties.StringProperty`
|
|
and defaults to `'android'`.
|
|
"""
|
|
|
|
badge_icon = StringProperty()
|
|
"""
|
|
Label badge icon name.
|
|
|
|
.. versionadded:: 1.0.0
|
|
|
|
:attr:`badge_icon` is an :class:`~kivy.properties.StringProperty`
|
|
and defaults to `''`.
|
|
"""
|
|
|
|
badge_icon_color = ColorProperty([1, 1, 1, 1])
|
|
"""
|
|
Badge icon color in (r, g, b, a) format.
|
|
|
|
.. versionadded:: 1.0.0
|
|
|
|
:attr:`badge_icon_color` is an :class:`~kivy.properties.ColorProperty`
|
|
and defaults to `None`.
|
|
"""
|
|
|
|
badge_bg_color = ColorProperty(None)
|
|
"""
|
|
Badge icon background color in (r, g, b, a) format.
|
|
|
|
.. versionadded:: 1.0.0
|
|
|
|
:attr:`badge_bg_color` is an :class:`~kivy.properties.ColorProperty`
|
|
and defaults to `None`.
|
|
"""
|
|
|
|
badge_font_size = NumericProperty()
|
|
"""
|
|
Badge font size.
|
|
|
|
.. versionadded:: 1.0.0
|
|
|
|
:attr:`badge_font_size` is an :class:`~kivy.properties.NumericProperty`
|
|
and defaults to `0`.
|
|
"""
|
|
|
|
source = StringProperty(None, allownone=True)
|
|
"""
|
|
Path to icon.
|
|
|
|
:attr:`source` is an :class:`~kivy.properties.StringProperty`
|
|
and defaults to `None`.
|
|
"""
|
|
|
|
def __init__(self, **kwargs):
|
|
from kivymd.uix.selectioncontrol import MDCheckbox
|
|
|
|
super().__init__(**kwargs)
|
|
if not isinstance(self, MDCheckbox):
|
|
self.size_hint = (None, None)
|
|
self.size = self.texture_size
|
|
self.adaptive_size = True
|