def build(self): widget = Widget(size=Window.size) with widget.canvas: #设置颜色 Color(255, 0, 255) #绘制一个与Widget一样大小的矩形 Rectangle(pos=widget.pos, size=widget.size) mywidget = MyWidget(size=(400, 400), pos=(200, 200)) with mywidget.canvas: #设置颜色 Color(0, 0, 255) #绘制一个与Widget一样大小的矩形 Rectangle(pos=mywidget.pos, size=mywidget.size) widget.add_widget(mywidget) widget.export_to_png("img.png") return widget
def on_touch_up(self, touch): file_loc = 'drawing.png' file_loc.replace Widget.export_to_png(self, file_loc) self.equation = CheckImage.check_image(file_loc)