self.bind('<Button-4>',self.wheel_up)            # untested no wheel mouse
        self.bind('<Button-5>',self.wheel_down)          # untested no wheel mouse
        
        self.bind('<Button1-Motion>',self.motion)        #during drag
        self.bind('<ButtonPress>',self.bdown)                #begin of drag
        self.bind('<ButtonRelease>',self.bup)                #end of drag 

        self.bind('<Double-1>',self.chgScaleDn)            # doubleclick scales down
        self.bind('<Double-2>',self.resetScale)         # doubleclick resets scale
        self.bind('<Double-3>',self.chgScaleUp)         # doubleclick scales up

        self.bind('<Shift-1>',self.resetValue)          # shift resets value