QGIS » QGIS Application

I am developing a python plugin operating on data imported from GPX file. My project is to UTM 51N spatialrefsys with On-the-fly transformation enabled and the gpx waypoints layer is in WGS-84 (see attached project file).

I want to reproject my waypoints to project SRS (UTM 51N) a do some calculation. I tried the following code but it does not work (newpoint coordinates are not in UTM)

renderer = self.canvas.mapRenderer()
newpoint = renderer.layerToMapCoordinates(waypointslayer, point)

I found out that it is because waypointslayer.crs is set to UTM in the API even though the GUI shows "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs" in the layer properties dialog. If I set the crs manually

srs = QgsCoordinateReferenceSystem(4326)
vectorlayer.setCrs(srs)

the transformations starts to work. I verified this in both 1.4.0 Windows standalone and trunk r13321 from OSGeo4W.
lrend = vectorlayer.renderer()
self.tell("project %s %s" % (renderer.hasCrsTransformEnabled(), renderer.destinationSrs().toWkt()))
self.tell("vectorlayer %s" % vectorlayer.crs().toWkt())
for i, point in enumerate(vlist):
self.tell("reprojecting %s from layer %s" % (point, vectorlayer.name()))
#vlist[i]= renderer.layerToMapCoordinates(vectorlayer, QgsPoint(pointr0, pointr1))
vlist[i]= renderer.layerToMapCoordinates(vectorlayer, point)
self.tell("reprojected as %s" % vlist[i])
return vlist