def drawNode(self, node):
        """This is the recursive method called for each node
        in the tree"""
        self._canvas.comment('begin node %r'%node)
        color = self._canvas._color
        if not (isinstance(node, Path) and node.isClipPath):
            self._canvas.saveState()

        #apply state changes
        deltas = getStateDelta(node)
        self._tracker.push(deltas)
        self.applyStateChanges(deltas, {})

        #draw the object, or recurse
        self.drawNodeDispatcher(node)

        rDeltas = self._tracker.pop()
        if not (isinstance(node, Path) and node.isClipPath):
            self._canvas.restoreState()
        self._canvas.comment('end node %r'%node)
        self._canvas._color = color

        #restore things we might have lost (without actually doing anything).
        for k, v in rDeltas.items():
            if k in self._restores:
                setattr(self._canvas,self._restores[k],v)

    def drawNode(self, node):
        """This is the recursive method called for each node in the tree.
        """

        if self.verbose:
            print "### begin _SVGRenderer.drawNode"

        self._canvas.comment("begin node %s" % ` node `)
        color = self._canvas._color
        if not (isinstance(node, Path) and node.isClipPath):
            pass  # self._canvas.saveState()

        # apply state changes
        deltas = getStateDelta(node)
        self._tracker.push(deltas)
        self.applyStateChanges(deltas, {})

        # draw the object, or recurse
        self.drawNodeDispatcher(node)

        rDeltas = self._tracker.pop()
        if not (isinstance(node, Path) and node.isClipPath):
            pass  # self._canvas.restoreState()
        self._canvas.comment("end node %s" % ` node `)
        self._canvas._color = color

        # restore things we might have lost (without actually doing anything).
        for k, v in rDeltas.items():
            if self._restores.has_key(k):
                setattr(self._canvas, self._restores[k], v)

        if self.verbose:
            print "### end _SVGRenderer.drawNode"

    def drawNode(self, node):
        """This is the recursive method called for each node
        in the tree"""
        #print "pdf:drawNode", self
        #if node.__class__ is Wedge: stop
        if not (isinstance(node, Path) and node.isClipPath):
            self._canvas.saveState()

        #apply state changes
        deltas = getStateDelta(node)
        self._tracker.push(deltas)
        self.applyStateChanges(deltas, {})

        #draw the object, or recurse
        self.drawNodeDispatcher(node)

        self._tracker.pop()
        if not (isinstance(node, Path) and node.isClipPath):
            self._canvas.restoreState()

 def push(self,node):
     deltas = getStateDelta(node)
     self._tracker.push(deltas)
     self.applyState()