#:import ZBarSymbol pyzbar.pyzbar.ZBarSymbol

BoxLayout:
    orientation: 'vertical'
    ZBarCam:
        id: zbarcam
        # optional, by default checks all types
        code_types: ZBarSymbol.QRCODE, ZBarSymbol.EAN13
        scan_callback: app._after_scan
        scanner_line_y_initial: self.size[1]/2 +self.qrwidth/2
        scanner_line_y_final: self.size[1]/2-self.qrwidth/2
    
        canvas:
            Color:
                rgba: 0,0,0,.25
            
            #left rect
            Rectangle:
                pos: self.pos[0], self.pos[1]
                size: self.size[0]/2-self.qrwidth/2, self.size[1]
            
            #right rect
            Rectangle:
                pos: self.size[0]/2+self.qrwidth/2, 0
                size: self.size[0]/2-self.qrwidth/2, self.size[1]
            
            #top rect
            Rectangle:
                pos: self.size[0]/2-self.qrwidth/2, self.size[1]/2+self.qrwidth/2
                size: self.qrwidth, self.size[1]/2-self.qrwidth/2
            
            #bottom rect
            Rectangle:
                pos: self.size[0]/2-self.qrwidth/2, 0
                size: self.qrwidth, self.size[1]/2-self.qrwidth/2