Python 禁用小部件动画

Question

我最近发布了类似的主题，但这次我会尽量更加清晰和具体。我的问题是 Kivy 中的小部件没有像预期的那样动画。下面是一些示例代码，为什么散点图比小部件更适合制作动画：

from kivy.app import App
from kivy.core.window import Window
from kivy.uix.widget import Widget
from kivy.uix.scatter import Scatter
from kivy.animation import Animation
from kivy.graphics import Color, Rectangle

class ExampleWidget(Widget):
    def __init__(self, **kwargs):
        super(ExampleWidget, self).__init__(**kwargs)
        self.size = (100,100)
        self.pos = (100,100)
        with self.canvas:
            Color(1,0,0)
            self.texture = Rectangle(size=self.size, pos=self.pos)

    def on_pos(self, obj, value):
        try: self.texture.pos = value
        except: pass

class ExampleScatterTexture(Widget):
    def __init__(self, **kwargs):
        super(ExampleScatterTexture, self).__init__(**kwargs)
        with self.canvas:
            Color(0,1,0)
            texture = Rectangle(size=self.size, pos=self.pos)

class ExampleScatter(Scatter):
    def __init__(self, **kwargs):
        super(ExampleScatter, self).__init__(**kwargs)
        self.do_rotation = False
        self.do_scale = False
        self.do_translation = False
        self.size = (100,100)
        self.pos = (100,300)
        texture = ExampleScatterTexture(size=self.size)
        self.add_widget(texture)

class ExampleScreen(Widget):
    def __init__(self, **kwargs):
        super(ExampleScreen, self).__init__(**kwargs)
        self.size = Window.size

        example_widget = ExampleWidget()
        self.add_widget(example_widget)

        example_scatter = ExampleScatter()
        self.add_widget(example_scatter)

        #SCATTER IS GREEN, WIDGET IS RED
        example_widget_animation = Animation(pos=(300,100), duration=2., t='in_bounce') + Animation(pos=(100,100), duration=2., t='in_bounce')
        example_scatter_animation = Animation(pos=(300,300), duration=2., t='in_bounce') + Animation(pos=(100,300), duration=2., t='in_bounce')
        example_widget_animation.repeat = True
        example_scatter_animation.repeat = True
        example_widget_animation.start(example_widget)
        example_scatter_animation.start(example_scatter)

class BadAnimationExample(App):
    def build(self):
        root = ExampleScreen()
        return root

if __name__ == "__main__":
    BadAnimationExample().run()

如您所见，小部件动画执行得非常快，然后有一个停顿，而散点动画非常像我们期望的那样。我的问题是，当我将手指放在散点图上时，我所有的 on_touch_move() 函数都不起作用。有什么解决办法吗？

Answer 1

好的，我解决了这个问题。我在子部件 class 中使用了我的 on_touch_move() 方法，解决方案是在父部件中使用它。那么散选就没有问题了

Python 禁用小部件动画

Python Kivy widget animation

python

animation

scatter

widget

kivy