Getting bounding box of a selected region through PyQGIS?

Question

Assume I have selected several features of a layer in QGIS and I would like to get the bounding information of the whole selected area through python console like the bounding of yellow regions the figure shows.

What is the easiest method to do it?

p.s. I have tried to use layer.selectedFeatures() but it just extract the list of selected features but cannot directly get the bounding info.

Answer 1

this is simpel in pyqgis:

layer = iface.activeLayer() # is the currently selected layer
box = layer.boundingBoxOfSelected() # creates a bounding box
iface.mapCanvas().setExtent(box) # zooms to this bounding box

you could also scale the box variable with

box.scale(2,box.center()[0], box.center()[1])

where "2" is the scale factor.

Tested with QGIS 2.18. For further research have a look athe pyqgis api of boundingBoxOfSelected

Answer 2

If you want the bounding box of every selected feature:

layer = iface.activeLayer()
for feature in layer.selectedFeaturesIterator():
    print feature.geometry().boundingBox()