[GIS] How to zoom to selected feature with QGIS Python Console

pyqgisqgisselect

I want to select a feature by ID and zoom to it. I tried the following but the canvas doesn't change. Any ideas?

canvas = qgis.utils.iface.mapCanvas()
cLayer = canvas.currentLayer()
cLayer.select(51)
canvas.zoomToSelected()

Try this:

canvas.zoomToSelected( cLayer )

The zoomToSelected method accepts a layer as argument, see QgsMapCanvas.

However, I've noticed it should also work without argument. That's strange.

You need to set the extents of the map canvas to the extents of the selections:

box = layer.boundingBoxOfSelected()
iface.mapCanvas().setExtent(box)
iface.mapCanvas().refresh()

Follow these 5 steps in the QGIS Python console:

Get the layer reference (I assume the layer is at the top of the ToC):

l = iface.mapCanvas().layers()[0]
Get a featureIterator from an expression:

expr = QgsExpression( "\"EXCHANGE_1141_CODE\"='IH'" ) it = l.getFeatures( QgsFeatureRequest( expr ) )
Build a list of feature Ids from the result obtained in 2.:

ids = [i.id() for i in it]
Select features with the ids obtained in 3.:

l.setSelectedFeatures( ids )
Zoom to selected features:

iface.mapCanvas().zoomToSelected()

I've tested this procedure in QGIS v.2.6.