Sideband/sbapp/kivymd/uix/imagelist/imagelist.py

"""
Components/ImageList
====================

.. seealso::

    `Material Design spec, Image lists <https://material.io/components/image-lists>`_

.. rubric:: Image lists display a collection of images in an organized grid.

.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/image-list.png
    :align: center

`KivyMD` provides the following tile classes for use:

Usage
-----

.. code-block:: python

    from kivy.lang import Builder

    from kivymd.app import MDApp

    KV = '''
    MDScreen:

        MDSmartTile:
            radius: 24
            box_radius: [0, 0, 24, 24]
            box_color: 1, 1, 1, .2
            source: "cats.jpg"
            pos_hint: {"center_x": .5, "center_y": .5}
            size_hint: None, None
            size: "320dp", "320dp"

            MDIconButton:
                icon: "heart-outline"
                theme_icon_color: "Custom"
                icon_color: 1, 0, 0, 1
                pos_hint: {"center_y": .5}
                on_release: self.icon = "heart" if self.icon == "heart-outline" else "heart-outline"

            MDLabel:
                text: "Julia and Julie"
                bold: True
                color: 1, 1, 1, 1
    '''


    class MyApp(MDApp):
        def build(self):
            return Builder.load_string(KV)


    MyApp().run()

.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-usage.gif
    :align: center

Implementation
--------------

.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-usage-sceleton.png
    :align: center
"""

__all__ = [
    "MDSmartTile",
]

import os

from kivy.lang import Builder
from kivy.properties import (
    BooleanProperty,
    ColorProperty,
    OptionProperty,
    StringProperty,
    VariableListProperty,
)
from kivy.uix.behaviors import ButtonBehavior

from kivymd import uix_path
from kivymd.theming import ThemableBehavior
from kivymd.uix.behaviors import RectangularRippleBehavior
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.fitimage import FitImage
from kivymd.uix.label import MDLabel
from kivymd.uix.relativelayout import MDRelativeLayout

with open(
    os.path.join(uix_path, "imagelist", "imagelist.kv"), encoding="utf-8"
) as kv_file:
    Builder.load_string(kv_file.read())


class SmartTileImage(RectangularRippleBehavior, ButtonBehavior, FitImage):
    """Implements the tile image."""


class SmartTileOverlayBox(MDBoxLayout):
    """Implements a container for custom widgets to be added to the tile."""


class MDSmartTile(MDRelativeLayout, ThemableBehavior):
    """
    A tile for more complex needs.

    Includes an image, a container to place overlays and a box that can act
    as a header or a footer, as described in the Material Design specs.

    :Events:
        `on_press`
            Called when the button is pressed.
        `on_release`
            Called when the button is released (i.e. the touch/click that
            pressed the button goes away).
    """

    box_radius = VariableListProperty([0], length=4)
    """
    Box radius.

    .. versionadded:: 1.0.0

    .. code-block:: kv

        MDSmartTile:
            radius: 24
            box_radius: [0, 0, 24, 24]

    .. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-box-radius.png
        :align: center

    :attr:`box_radius` is an :class:`~kivy.properties.VariableListProperty`
    and defaults to `[0, 0, 0, 0]`.
    """

    box_color = ColorProperty((0, 0, 0, 0.5))
    """
    Sets the color and opacity for the information box.

    .. code-block:: kv

        MDSmartTile:
            radius: 24
            box_radius: [0, 0, 24, 24]
            box_color: 0, 1, 0, .5

    .. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-box-color.png
        :align: center

    :attr:`box_color` is a :class:`~kivy.properties.ColorProperty`
    and defaults to `(0, 0, 0, 0.5)`.
    """

    box_position = OptionProperty("footer", options=["footer", "header"])
    """
    Determines weather the information box acts as a header or footer to the
    image. Available are options: `'footer'`, `'header'`.

    .. code-block:: kv

        MDSmartTile:
            radius: 24
            box_radius: [24, 24, 0, 0]
            box_position: "header"

    .. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-box-position.png
        :align: center

    :attr:`box_position` is a :class:`~kivy.properties.OptionProperty`
    and defaults to `'footer'`.
    """

    overlap = BooleanProperty(True)
    """
    Determines if the `header/footer` overlaps on top of the image or not.

    .. code-block:: kv

        MDSmartTile:
            radius: [24, 24, 0, 0]
            box_radius: [0, 0, 24, 24]
            overlap: False

    .. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-overlap.png
        :align: center

    :attr:`overlap` is a :class:`~kivy.properties.BooleanProperty`
    and defaults to `True`.
    """

    lines = OptionProperty(1, options=[1, 2])
    """
    Number of lines in the `header/footer`. As per `Material Design specs`,
    only 1 and 2 are valid values. Available are options: `1`, `2`.
    This parameter just increases the height of the container for custom
    elements.

    .. code-block:: kv

        MDSmartTile:
            radius: 24
            box_radius: [0, 0, 24, 24]
            lines: 2
            source: "cats.jpg"
            pos_hint: {"center_x": .5, "center_y": .5}
            size_hint: None, None
            size: "320dp", "320dp"

            MDIconButton:
                icon: "heart-outline"
                theme_icon_color: "Custom"
                icon_color: 1, 0, 0, 1
                pos_hint: {"center_y": .5}
                on_release: self.icon = "heart" if self.icon == "heart-outline" else "heart-outline"

            TwoLineListItem:
                text: "[color=#ffffff][b]My cats[/b][/color]"
                secondary_text: "[color=#808080][b]Julia and Julie[/b][/color]"
                pos_hint: {"center_y": .5}
                _no_ripple_effect: True

    .. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/md-smart-tile-lines.png
        :align: center

    :attr:`lines` is a :class:`~kivy.properties.OptionProperty`
    and defaults to `1`.
    """

    source = StringProperty()
    """
    Path to tile image. See :attr:`~kivy.uix.image.Image.source`.

    :attr:`source` is a :class:`~kivy.properties.StringProperty`
    and defaults to `''`.
    """

    mipmap = BooleanProperty(False)
    """
    Indicate if you want OpenGL mipmapping to be applied to the texture.
    Read :ref:`mipmap` for more information.

    .. versionadded:: 1.0.0

    :attr:`mipmap` is a :class:`~kivy.properties.BooleanProperty`
    and defaults to `False`.
    """

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.register_event_type("on_release")
        self.register_event_type("on_press")

    def on_release(self, *args):
        """
        Called when the button is released (i.e. the touch/click that
        pressed the button goes away).
        """

    def on_press(self, *args):
        """Called when the button is pressed."""

    def add_widget(self, widget, *args, **kwargs):
        if isinstance(widget, (SmartTileImage, SmartTileOverlayBox)):
            return super().add_widget(widget, *args, **kwargs)
        else:
            if isinstance(widget, MDLabel):
                widget.shorten = True
                widget.shorten_from = "right"
            self.ids.box.add_widget(widget)