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kivy_venv/share/kivy-examples/cover/cover_image.py

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+import kivy
+from kivy.app import App
+from kivy.uix.behaviors import CoverBehavior
+from kivy.uix.image import Image
+
+
+class CoverImage(CoverBehavior, Image):
+    """Image using cover behavior.
+    """
+
+    def __init__(self, **kwargs):
+        super(CoverImage, self).__init__(**kwargs)
+        texture = self._coreimage.texture
+        self.reference_size = texture.size
+        self.texture = texture
+
+
+class MainApp(App):
+
+    def build(self):
+        return CoverImage(source='../widgets/cityCC0.png')
+
+
+if __name__ == '__main__':
+    MainApp().run()

kivy_venv/share/kivy-examples/cover/cover_video.py

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+import kivy
+from kivy.app import App
+from kivy.uix.behaviors import CoverBehavior
+from kivy.uix.video import Video
+
+
+class CoverVideo(CoverBehavior, Video):
+    """Video using cover behavior.
+    """
+
+    def _on_video_frame(self, *largs):
+        video = self._video
+        if not video:
+            return
+        texture = video.texture
+        self.reference_size = texture.size
+        self.calculate_cover()
+        self.duration = video.duration
+        self.position = video.position
+        self.texture = texture
+        self.canvas.ask_update()
+
+
+class MainApp(App):
+
+    def build(self):
+        return CoverVideo(source='../widgets/cityCC0.mpg', play=True)
+
+
+if __name__ == '__main__':
+    MainApp().run()