test-kivy-app/kivy_venv/share/kivy-examples/widgets/effectwidget.py

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2024-09-15 12:12:16 +00:00
'''
Example usage of the effectwidget.
Currently highly experimental.
'''
from kivy.app import App
from kivy.uix.effectwidget import EffectWidget
from kivy.uix.spinner import Spinner
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.uix.effectwidget import (MonochromeEffect,
InvertEffect,
ChannelMixEffect,
ScanlinesEffect,
FXAAEffect,
PixelateEffect,
HorizontalBlurEffect,
VerticalBlurEffect)
class ComparisonWidget(EffectWidget):
pass
class EffectSpinner(Spinner):
pass
class SpinnerRow(BoxLayout):
effectwidget = ObjectProperty()
def update_effectwidget(self, *args):
effects = []
for child in self.children[::-1]:
text = child.text
if text == 'none':
pass
if text == 'fxaa':
effects.append(FXAAEffect())
if text == 'monochrome':
effects.append(MonochromeEffect())
if text == 'invert':
effects.append(InvertEffect())
if text == 'mix':
effects.append(ChannelMixEffect())
if text == 'blur_h':
effects.append(HorizontalBlurEffect())
if text == 'blur_v':
effects.append(VerticalBlurEffect())
if text == 'postprocessing':
effects.append(ScanlinesEffect())
if text == 'pixelate':
effects.append(PixelateEffect())
if self.effectwidget:
self.effectwidget.effects = effects
example = Builder.load_string('''
#:import Vector kivy.vector.Vector
BoxLayout:
orientation: 'vertical'
FloatLayout:
ComparisonWidget:
pos_hint: {'x': 0, 'y': 0}
size_hint: 0.5, 1
id: effect1
ComparisonWidget:
pos_hint: {'x': pos_slider.value, 'y': 0}
size_hint: 0.5, 1
id: effect2
background_color: (rs.value, gs.value, bs.value, als.value)
SpinnerRow:
effectwidget: effect1
text: 'left effects'
SpinnerRow:
effectwidget: effect2
text: 'right effects'
BoxLayout:
size_hint_y: None
height: sp(40)
Label:
text: 'control overlap:'
Slider:
min: 0
max: 0.5
value: 0.5
id: pos_slider
BoxLayout:
size_hint_y: None
height: sp(40)
Label:
text: 'right bg r,g,b,a'
Slider:
min: 0
max: 1
value: 0
id: rs
Slider:
min: 0
max: 1
value: 0
id: gs
Slider:
min: 0
max: 1
value: 0
id: bs
Slider:
min: 0
max: 1
value: 0
id: als
<ComparisonWidget>:
Widget:
canvas:
Color:
rgba: 1, 0, 0, 1
Ellipse:
pos: Vector(self.pos) + 0.5*Vector(self.size)
size: 0.4*Vector(self.size)
Color:
rgba: 0, 1, 0.3, 1
Ellipse:
pos: Vector(self.pos) + 0.1*Vector(self.size)
size: 0.6*Vector(self.size)
Color:
rgba: 0.5, 0.3, 0.8, 1
Ellipse:
pos: Vector(self.pos) + Vector([0, 0.6])*Vector(self.size)
size: 0.4*Vector(self.size)
Color:
rgba: 1, 0.8, 0.1, 1
Ellipse:
pos: Vector(self.pos) + Vector([0.5, 0])*Vector(self.size)
size: 0.4*Vector(self.size)
Color:
rgba: 0, 0, 0.8, 1
Line:
points:
[self.x, self.y,
self.x + self.width, self.y + 0.3*self.height,
self.x + 0.2*self.width, self.y + 0.1*self.height,
self.x + 0.85*self.width, self.y + 0.72*self.height,
self.x + 0.31*self.width, self.y + 0.6*self.height,
self.x, self.top]
width: 1
Color:
rgba: 0, 0.9, 0.1, 1
Line:
points:
[self.x + self.width, self.y + self.height,
self.x + 0.35*self.width, self.y + 0.6*self.height,
self.x + 0.7*self.width, self.y + 0.15*self.height,
self.x + 0.2*self.width, self.y + 0.22*self.height,
self.x + 0.3*self.width, self.y + 0.92*self.height]
width: 2
<SpinnerRow>:
orientation: 'horizontal'
size_hint_y: None
height: dp(40)
text: ''
Label:
text: root.text
EffectSpinner:
on_text: root.update_effectwidget()
EffectSpinner:
on_text: root.update_effectwidget()
EffectSpinner:
on_text: root.update_effectwidget()
<EffectSpinner>:
text: 'none'
values:
['none', 'fxaa', 'monochrome',
'invert', 'mix',
'blur_h', 'blur_v',
'postprocessing', 'pixelate',]
''')
class EffectApp(App):
def build(self):
return example
EffectApp().run()