mirror of https://github.com/kivy/kivy.git
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
'''
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Canvas stress
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=============
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This example tests the performance of our Graphics engine by drawing large
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numbers of small squares. You should see a black canvas with buttons and a
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label at the bottom. Pressing the buttons adds small colored squares to the
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canvas.
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'''
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from kivy.uix.button import Button
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from kivy.uix.widget import Widget
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from kivy.uix.label import Label
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from kivy.uix.boxlayout import BoxLayout
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from kivy.app import App
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from kivy.graphics import Color, Rectangle
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from random import random as r
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from functools import partial
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class StressCanvasApp(App):
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def add_rects(self, label, wid, count, *largs):
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label.text = str(int(label.text) + count)
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with wid.canvas:
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for x in range(count):
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Color(r(), 1, 1, mode='hsv')
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Rectangle(pos=(r() * wid.width + wid.x,
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r() * wid.height + wid.y), size=(20, 20))
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def double_rects(self, label, wid, *largs):
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count = int(label.text)
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self.add_rects(label, wid, count, *largs)
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def reset_rects(self, label, wid, *largs):
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label.text = '0'
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wid.canvas.clear()
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def build(self):
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wid = Widget()
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label = Label(text='0')
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btn_add100 = Button(text='+ 100 rects',
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on_press=partial(self.add_rects, label, wid, 100))
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btn_add500 = Button(text='+ 500 rects',
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on_press=partial(self.add_rects, label, wid, 500))
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btn_double = Button(text='x 2',
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on_press=partial(self.double_rects, label, wid))
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btn_reset = Button(text='Reset',
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on_press=partial(self.reset_rects, label, wid))
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layout = BoxLayout(size_hint=(1, None), height=50)
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layout.add_widget(btn_add100)
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layout.add_widget(btn_add500)
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layout.add_widget(btn_double)
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layout.add_widget(btn_reset)
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layout.add_widget(label)
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root = BoxLayout(orientation='vertical')
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root.add_widget(wid)
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root.add_widget(layout)
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return root
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if __name__ == '__main__':
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StressCanvasApp().run()
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