How to automatically reload raster layers if source is changed in QGIS?

[المشرف العام]

How to automatically reloaded raster layer if source is changed? (The path is the same but inside source file are changes)

I use:

qgis.utils.iface.mapCanvas().refresh() but layer not refresh.

# # #

The maps are repainting but there are still the same image (source file is changed on disc)

I use:

layers = qgis.utils.iface.legendInterface().layers() for layer in layers: layer.triggerRepaint()

أكثر...