I am using a database view as a source to draw a line over a map in QGIS 2.18.12. This view contains just one registration and it changes from time to time. I would like to draw the line automatically when the view changes. Is it possible to do this from a Python script? For the moment my solution is to reload the whole project, but it is not as fine as I expected because I want to refresh just the line not all layers.
The code I use now is:
from PyQt4.QtCore import * from PyQt4.QtGui import * from qgis.core import * from qgis.gui import * from qgis.utils import iface from PyQt4.QtCore import QTimer timer = QTimer() timer.setInterval(10000) QObject.connect(timer, SIGNAL("timeout()"),qgis.utils.iface.mapCanvas().refreshAllLayers) timer.start()