How to enable the snapping options for vector layer using the python programming?

Question

I want to enable the snapping options for the the existing layers using python programming. How can I do this?

Answer 1

I found a post here of someone who developed an Azimuth and Distance plugin which involved using snapping. You could take a look into the source code, it might lead you to the right direction.

Here is the script from the link posted:

def canvasPressEvent(self,event):
    pixels=event.pos()
    snapper=QgsMapCanvasSnapper(self.canvas)
    snapped=snapper.snapToBackgroundLayers(pixels)
    if len(snapped[1])>0:
        xy=snapped[1][0].afterVertex
    else:
        #transforming pixels to x,y
        transform = self.canvas.getCoordinateTransform()
        xy = transform.toMapCoordinates(pixels) #captures the clicked coordinate and transform
    self.emit(SIGNAL("finished(PyQt_PyObject)"),xy)     #return QgsPoint in a signal