我想测试Kivy的Animation
函数的所有可能的转换。在
在我的代码中,我调用了一个方法来切换按钮的动画。方法被成功调用,因为我使用了print
来确认更改;但是,按钮的转换不接受更改。在下一个动画列表中,他们不使用第一个动画。在
我做错什么了?在
from kivy.app import App
from kivy.core.window import Window
from kivy.lang import Builder
from random import random
from kivy.uix.button import Button
from kivy.animation import Animation
from kivy.clock import Clock
class LittleButtons(Button):
transition = 'in_back'
dur = 2
num = 0
def change_transition(self):
list = ['in_back','in_bounce','in_circ','in_cubic','in_elastic','in_expo','in_out_back',
'in_out_bounce','in_out_cubic','in_out_elastic','in_out_expo',
'in_out_quad','in_out_quart','in_out_quint','in_out_sine','in_quad','in_quart',
'in_quint','in_sine','linear','out_back','out_bounce','out_circ','out_cubic',
'out_elastic','out_expo','out_quad','out_quart','out_quint','out_sine']
self.num += 1
self.transition = list[self.num]
self.reup()
print(self.transition)
if self.num == len(list) - 1:
self.num = -1
def reup(self, *args):
Animation.cancel_all(self)
anim = Animation(pos_hint = {'center_x': random(), 'center_y': random()},
duration = self.dur, t = self.transition)
anim.start(self)
def __init__(self, **kwargs):
super(LittleButtons, self).__init__(**kwargs)
self.pos_hint = {'center_x': random(), 'center_y': random()}
self.size_hint = None, None
self.width = random() * (Window.width / 20)
self.height = random() * (Window.width / 20)
self.background_color = [0,0,0,.05]
Animation(pos_hint = {'center_x': random(), 'center_y': random()},
duration = self.dur).start(self)
Clock.schedule_interval(self.reup, self.dur)
KV = Builder.load_string("""
#:import Factory kivy.factory.Factory
Screen:
FloatLayout:
on_parent:
(lambda ltext: [self.add_widget(Factory.LittleButtons(text=ltext)) for i in range (150)])('hi!')
LittleButtons:
id: base
Button:
background_color: 0,0,0,0
canvas:
Color:
rgba: 0,1,1,1
Rectangle:
pos: self.pos
size:self.size
on_release:
base.change_transition()
""")
class MyApp(App):
def build(self):
return KV
if __name__ == '__main__':
MyApp().run()
您的代码正在工作,但没有执行您期望的操作。您的
on_release
调用base.change_transition()
,它引用了base
id。该id
是您的KV
字符串中的LittleButtons
,它不是由on_parent
事件生成的。其中一个LittleButtons
的动画转换已成功修改,但其他的不受影响。另外,这个特殊的LittleButtons
是看不见的,因为大的Button
隐藏了它。所以,您成功地改变了一个LittleButtons
的转换,但是它没有显示出来。在相关问题 更多 >
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