391 lines
12 KiB
Python
Executable file
391 lines
12 KiB
Python
Executable file
"""
|
||
Behaviors/Ripple
|
||
================
|
||
|
||
.. rubric:: Classes implements a circular and rectangular ripple effects.
|
||
|
||
To create a widget with сircular ripple effect, you must create a new class
|
||
that inherits from the :class:`~CircularRippleBehavior` class.
|
||
|
||
For example, let's create an image button with a circular ripple effect:
|
||
|
||
.. code-block:: python
|
||
|
||
from kivy.lang import Builder
|
||
from kivy.uix.behaviors import ButtonBehavior
|
||
from kivy.uix.image import Image
|
||
|
||
from kivymd.app import MDApp
|
||
from kivymd.uix.behaviors import CircularRippleBehavior
|
||
|
||
KV = '''
|
||
#:import images_path kivymd.images_path
|
||
|
||
|
||
Screen:
|
||
|
||
CircularRippleButton:
|
||
source: f"{images_path}/kivymd.png"
|
||
size_hint: None, None
|
||
size: "250dp", "250dp"
|
||
pos_hint: {"center_x": .5, "center_y": .5}
|
||
'''
|
||
|
||
|
||
class CircularRippleButton(CircularRippleBehavior, ButtonBehavior, Image):
|
||
def __init__(self, **kwargs):
|
||
self.ripple_scale = 0.85
|
||
super().__init__(**kwargs)
|
||
|
||
|
||
class Example(MDApp):
|
||
def build(self):
|
||
self.theme_cls.theme_style = "Dark"
|
||
return Builder.load_string(KV)
|
||
|
||
|
||
Example().run()
|
||
|
||
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/circular-ripple-effect.gif
|
||
:align: center
|
||
|
||
To create a widget with rectangular ripple effect, you must create a new class
|
||
that inherits from the :class:`~RectangularRippleBehavior` class:
|
||
|
||
.. code-block:: python
|
||
|
||
from kivy.lang import Builder
|
||
from kivy.uix.behaviors import ButtonBehavior
|
||
|
||
from kivymd.app import MDApp
|
||
from kivymd.uix.behaviors import RectangularRippleBehavior, BackgroundColorBehavior
|
||
|
||
KV = '''
|
||
Screen:
|
||
|
||
RectangularRippleButton:
|
||
size_hint: None, None
|
||
size: "250dp", "50dp"
|
||
pos_hint: {"center_x": .5, "center_y": .5}
|
||
'''
|
||
|
||
|
||
class RectangularRippleButton(
|
||
RectangularRippleBehavior, ButtonBehavior, BackgroundColorBehavior
|
||
):
|
||
md_bg_color = [0, 0, 1, 1]
|
||
|
||
|
||
class Example(MDApp):
|
||
def build(self):
|
||
self.theme_cls.theme_style = "Dark"
|
||
return Builder.load_string(KV)
|
||
|
||
|
||
Example().run()
|
||
|
||
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/rectangular-ripple-effect.gif
|
||
:align: center
|
||
"""
|
||
|
||
__all__ = (
|
||
"CommonRipple",
|
||
"RectangularRippleBehavior",
|
||
"CircularRippleBehavior",
|
||
)
|
||
|
||
from kivy.animation import Animation
|
||
from kivy.graphics import (
|
||
Color,
|
||
Ellipse,
|
||
Rectangle,
|
||
StencilPop,
|
||
StencilPush,
|
||
StencilUnUse,
|
||
StencilUse,
|
||
)
|
||
from kivy.properties import (
|
||
BooleanProperty,
|
||
ListProperty,
|
||
NumericProperty,
|
||
StringProperty,
|
||
)
|
||
|
||
|
||
class CommonRipple(object):
|
||
"""Base class for ripple effect."""
|
||
|
||
ripple_rad_default = NumericProperty(1)
|
||
"""
|
||
Default value of the ripple effect radius.
|
||
|
||
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/ripple-rad-default.gif
|
||
:align: center
|
||
|
||
:attr:`ripple_rad_default` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `1`.
|
||
"""
|
||
|
||
ripple_color = ListProperty()
|
||
"""
|
||
Ripple color in ``rgba`` format.
|
||
|
||
:attr:`ripple_color` is an :class:`~kivy.properties.ListProperty`
|
||
and defaults to `[]`.
|
||
"""
|
||
|
||
ripple_alpha = NumericProperty(0.5)
|
||
"""
|
||
Alpha channel values for ripple effect.
|
||
|
||
:attr:`ripple_alpha` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `0.5`.
|
||
"""
|
||
|
||
ripple_scale = NumericProperty(None)
|
||
"""
|
||
Ripple effect scale.
|
||
|
||
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/ripple-scale-1.gif
|
||
:align: center
|
||
|
||
:attr:`ripple_scale` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `None`.
|
||
"""
|
||
|
||
ripple_duration_in_fast = NumericProperty(0.3)
|
||
"""
|
||
Ripple duration when touching to widget.
|
||
|
||
:attr:`ripple_duration_in_fast` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `0.3`.
|
||
"""
|
||
|
||
ripple_duration_in_slow = NumericProperty(2)
|
||
"""
|
||
Ripple duration when long touching to widget.
|
||
|
||
:attr:`ripple_duration_in_slow` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `2`.
|
||
"""
|
||
|
||
ripple_duration_out = NumericProperty(0.3)
|
||
"""
|
||
The duration of the disappearance of the wave effect.
|
||
|
||
.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/ripple-duration-out.gif
|
||
:align: center
|
||
|
||
:attr:`ripple_duration_out` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `0.3`.
|
||
"""
|
||
|
||
ripple_func_in = StringProperty("out_quad")
|
||
"""
|
||
Type of animation for ripple in effect.
|
||
|
||
:attr:`ripple_func_in` is an :class:`~kivy.properties.StringProperty`
|
||
and defaults to `'out_quad'`.
|
||
"""
|
||
|
||
ripple_func_out = StringProperty("out_quad")
|
||
"""
|
||
Type of animation for ripple out effect.
|
||
|
||
:attr:`ripple_func_in` is an :class:`~kivy.properties.StringProperty`
|
||
and defaults to `'ripple_func_out'`.
|
||
"""
|
||
|
||
_ripple_rad = NumericProperty()
|
||
_doing_ripple = BooleanProperty(False)
|
||
_finishing_ripple = BooleanProperty(False)
|
||
_fading_out = BooleanProperty(False)
|
||
_no_ripple_effect = BooleanProperty(False)
|
||
|
||
def lay_canvas_instructions(self):
|
||
raise NotImplementedError
|
||
|
||
def start_ripple(self):
|
||
if not self._doing_ripple:
|
||
self._doing_ripple = True
|
||
anim = Animation(
|
||
_ripple_rad=self.finish_rad,
|
||
t="linear",
|
||
duration=self.ripple_duration_in_slow,
|
||
)
|
||
anim.bind(on_complete=self.fade_out)
|
||
|
||
anim.start(self)
|
||
|
||
def finish_ripple(self):
|
||
if self._doing_ripple and not self._finishing_ripple:
|
||
self._finishing_ripple = True
|
||
self._doing_ripple = False
|
||
Animation.cancel_all(self, "_ripple_rad")
|
||
anim = Animation(
|
||
_ripple_rad=self.finish_rad,
|
||
t=self.ripple_func_in,
|
||
duration=self.ripple_duration_in_fast,
|
||
)
|
||
anim.bind(on_complete=self.fade_out)
|
||
anim.start(self)
|
||
|
||
def fade_out(self, *args):
|
||
rc = self.ripple_color
|
||
if not self._fading_out:
|
||
self._fading_out = True
|
||
Animation.cancel_all(self, "ripple_color")
|
||
anim = Animation(
|
||
ripple_color=[rc[0], rc[1], rc[2], 0.0],
|
||
t=self.ripple_func_out,
|
||
duration=self.ripple_duration_out,
|
||
)
|
||
anim.bind(on_complete=self.anim_complete)
|
||
anim.start(self)
|
||
|
||
def anim_complete(self, *args):
|
||
self._doing_ripple = False
|
||
self._finishing_ripple = False
|
||
self._fading_out = False
|
||
self.canvas.after.clear()
|
||
|
||
def on_touch_down(self, touch):
|
||
if touch.is_mouse_scrolling:
|
||
return False
|
||
if not self.collide_point(touch.x, touch.y):
|
||
return False
|
||
|
||
if not self.disabled:
|
||
if self._doing_ripple:
|
||
Animation.cancel_all(
|
||
self, "_ripple_rad", "ripple_color", "rect_color"
|
||
)
|
||
self.anim_complete()
|
||
self._ripple_rad = self.ripple_rad_default
|
||
self.ripple_pos = (touch.x, touch.y)
|
||
|
||
if self.ripple_color:
|
||
pass
|
||
elif hasattr(self, "theme_cls"):
|
||
self.ripple_color = self.theme_cls.ripple_color
|
||
else:
|
||
# If no theme, set Gray 300.
|
||
self.ripple_color = [
|
||
0.8784313725490196,
|
||
0.8784313725490196,
|
||
0.8784313725490196,
|
||
self.ripple_alpha,
|
||
]
|
||
self.ripple_color[3] = self.ripple_alpha
|
||
self.lay_canvas_instructions()
|
||
self.finish_rad = max(self.width, self.height) * self.ripple_scale
|
||
self.start_ripple()
|
||
return super().on_touch_down(touch)
|
||
|
||
def on_touch_move(self, touch, *args):
|
||
if not self.collide_point(touch.x, touch.y):
|
||
if not self._finishing_ripple and self._doing_ripple:
|
||
self.finish_ripple()
|
||
return super().on_touch_move(touch, *args)
|
||
|
||
def on_touch_up(self, touch):
|
||
if self.collide_point(touch.x, touch.y) and self._doing_ripple:
|
||
self.finish_ripple()
|
||
return super().on_touch_up(touch)
|
||
|
||
def _set_ellipse(self, instance, value):
|
||
self.ellipse.size = (self._ripple_rad, self._ripple_rad)
|
||
|
||
# Adjust ellipse pos here
|
||
|
||
def _set_color(self, instance, value):
|
||
self.col_instruction.a = value[3]
|
||
|
||
|
||
class RectangularRippleBehavior(CommonRipple):
|
||
"""Class implements a rectangular ripple effect."""
|
||
|
||
ripple_scale = NumericProperty(2.75)
|
||
"""
|
||
See :class:`~CommonRipple.ripple_scale`.
|
||
|
||
:attr:`ripple_scale` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `2.75`.
|
||
"""
|
||
|
||
def lay_canvas_instructions(self):
|
||
if self._no_ripple_effect:
|
||
return
|
||
with self.canvas.after:
|
||
StencilPush()
|
||
Rectangle(pos=self.pos, size=self.size)
|
||
StencilUse()
|
||
self.col_instruction = Color(rgba=self.ripple_color)
|
||
self.ellipse = Ellipse(
|
||
size=(self._ripple_rad, self._ripple_rad),
|
||
pos=(
|
||
self.ripple_pos[0] - self._ripple_rad / 2.0,
|
||
self.ripple_pos[1] - self._ripple_rad / 2.0,
|
||
),
|
||
)
|
||
StencilUnUse()
|
||
Rectangle(pos=self.pos, size=self.size)
|
||
StencilPop()
|
||
self.bind(ripple_color=self._set_color, _ripple_rad=self._set_ellipse)
|
||
|
||
def _set_ellipse(self, instance, value):
|
||
super()._set_ellipse(instance, value)
|
||
self.ellipse.pos = (
|
||
self.ripple_pos[0] - self._ripple_rad / 2.0,
|
||
self.ripple_pos[1] - self._ripple_rad / 2.0,
|
||
)
|
||
|
||
|
||
class CircularRippleBehavior(CommonRipple):
|
||
"""Class implements a circular ripple effect."""
|
||
|
||
ripple_scale = NumericProperty(1)
|
||
"""
|
||
See :class:`~CommonRipple.ripple_scale`.
|
||
|
||
:attr:`ripple_scale` is an :class:`~kivy.properties.NumericProperty`
|
||
and defaults to `1`.
|
||
"""
|
||
|
||
def lay_canvas_instructions(self):
|
||
with self.canvas.after:
|
||
StencilPush()
|
||
self.stencil = Ellipse(
|
||
size=(
|
||
self.width * self.ripple_scale,
|
||
self.height * self.ripple_scale,
|
||
),
|
||
pos=(
|
||
self.center_x - (self.width * self.ripple_scale) / 2,
|
||
self.center_y - (self.height * self.ripple_scale) / 2,
|
||
),
|
||
)
|
||
StencilUse()
|
||
self.col_instruction = Color(rgba=self.ripple_color)
|
||
self.ellipse = Ellipse(
|
||
size=(self._ripple_rad, self._ripple_rad),
|
||
pos=(
|
||
self.center_x - self._ripple_rad / 2.0,
|
||
self.center_y - self._ripple_rad / 2.0,
|
||
),
|
||
)
|
||
StencilUnUse()
|
||
Ellipse(pos=self.pos, size=self.size)
|
||
StencilPop()
|
||
self.bind(
|
||
ripple_color=self._set_color, _ripple_rad=self._set_ellipse
|
||
)
|
||
|
||
def _set_ellipse(self, instance, value):
|
||
super()._set_ellipse(instance, value)
|
||
if self.ellipse.size[0] > self.width * 0.6 and not self._fading_out:
|
||
self.fade_out()
|
||
self.ellipse.pos = (
|
||
self.center_x - self._ripple_rad / 2.0,
|
||
self.center_y - self._ripple_rad / 2.0,
|
||
)
|