self.selectedlights.remove(lightname)

        self.updateselectionboxes()

    #

    # LMB click or drag

    #

    def leftpress(self,ev):

        self.lmbstate='pressed'

        self.lmbstart=(ev.x,ev.y)

        shifted=ev.state & 1

        control=ev.state & 4

        touching=self.findoverlappinglights((ev.x-self.halo,ev.y-self.halo,ev.x+self.halo,ev.y+self.halo))

        istouching=len(touching)>0

        if not istouching:

            # clicked in space

            if not shifted and not control and len(self.selectedlights)>0:

                # either a deselect (if no motion) or a level change (if motion)

                self.lmbstate = 'deselect-or-level'

            if shifted or control or len(self.selectedlights)==0:

            for t in self.gettags(o):

                if t.startswith("name_"):

                    n = self.tagtoname(t[5:])

                    if n and (n not in lights):

                        lights.append(n)

        return lights

root=Tk()

root.wm_geometry("+376+330")

s=Stage(root)

s.setimage('guysanddolls.gif')

s.pack()

root.mainloop()