[Qgis-developer] How to set up QgsPointLocator.MatchFilter in python?

[luna]

I'm working with QGis 2.8 and python.
I replaced my QgsMapCanvasSnapper to QgsSnappingUtils. The following code
works fine for me.

    def canvasPressEvent(self,event):
    x = event.pos().x()
    y = event.pos().y()
    startingPoint = QPoint(x,y)
    utils = self.canvas.snappingUtils()
    SegmentLocator = utils.snapToCurrentLayer(startingPoint, 2)
    if SegmentLocator.isValid():
    edge = SegmentLocator.edgePoints()
    pt1 = edge[1]
    pt2 = edge[0]

Now I try to set up the MatchFilter to get matches only from a particular
feature ID. But I don't know how to begin. The following code dosen't work.

    fid = self.layer.selectedFeaturesIds()[0]
    filter = QgsPointLocator.MatchFilter
    match = QgsPointLocator.Match()
    filter.acceptMatch(match.featureId() == fid)
    SegmentLocator = utils.snapToCurrentLayer(startingPoint, 2, filter)

It would be nice if somebody can help me.



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