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)
