파이썬[Python]: kivy - Callback 클래스

kivy.graphics 모듈 - Callback 클래스(class)

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1초에 한번씩 callback 함수를 호출합니다.

참고: graphics 모듈 목록

※ 형식
Callback(callback=None, **kwargs)

reference
https://kivy.org/doc/stable/api-kivy.graphics.html

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/// 예제

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import kivy   kivy.require('2.0.0')   from kivy.app import App from kivy.base import EventLoop from kivy.core.window import Window from kivy.graphics import RenderContext, Color, Rectangle, \                           Callback, Rotate from kivy.uix.widget import Widget   Window.clearcolor = (1, 1, 1, 1) Window.size = (563, 1001) Window.top, Window.left = 30, 2900   fs = ''' $HEADER$ void main(void) {     gl_FragColor = texture2D(texture0, tex_coord0); } '''     class CustomWidget(Widget):     def __init__(self, **kwargs):         # Before doing anything, ensure the windows exist.         EventLoop.ensure_window()           self.texture()  # drawing         self.bind(size=self._update_pos)  # get real size of class CustomWidget         super(CustomWidget, self).__init__(**kwargs)       def _update_pos(self, instance, value):         self.rect.pos = self.center         self.rt.origin = self.center       def _my_callback(self, inst):         self.canvas.remove(self.rect)         self.canvas.add(Rotate(angle=45, origin=self.center))         self.rect = Rectangle(source='./football.png', size=(250, 30), pos=self.center)         self.canvas.add(self.rect)         def texture(self, *args):         # all the necessary information for drawing         self.canvas = RenderContext()           # set shader.fs         self.canvas.shader.fs = fs           with self.canvas:             Color(0, 1, 1, 1)             self.rt = Rotate(angle=-45, origin=self.center)             self.rect = Rectangle(source='./football.png', size=(250, 30), pos=self.center)             Callback(self._my_callback)  # call _my_callback() every 1 second           # the default vertex shader         self.canvas['projection_mat'] = Window.render_context['projection_mat']     class FantasticApp(App):     def build(self):         return CustomWidget()     FantasticApp().run()   Colored by Color Scripter

cs

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* 실행환경: Microsoft Windows 10 Homes
* 인터프리터: 파이썬(Python 3.9)

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