<RelativeWidget>: # 画布之后 canvas.before: Color: # 白色 rgba:[1,1,1,1] Rectangle: pos:self.pos # 最大布局 size:self.size canvas: Color: # 红 rgba:[.5,.1,.1,1] Rectangle: pos:self.pos size:300,300 # 之前 canvas.after: Color: # 绿 ...