Change main properties of map composer from cache to render from Python Console

Question

I'm trying to print out a map from Python console. The issue is that when I add a layer to the map composer, the property of the map is set to cache. However, I want to change it to render so that the map would look less blurry.

Below is my code to add a layer to the map composer:

map_settings = iface.mapCanvas().mapSettings()
c = QgsComposition(map_settings)

view = iface.createNewComposer()
view.setComposition(c)

composerMap = QgsComposerMap(c, 10 ,10, 160, 20)
composerMap.setBackgroundEnabled(True)

rect = QgsRectangle(map_settings.fullExtent())
composerMap.setNewExtent(rect)
composerMap.updateItem()
c.addComposerMap(composerMap)

I am wondering if there is any way to set the main property of map as render instead of cache from Python console.

Answer 1

You could set it using QgsComposerMap::setPreviewMode():

composerMap.setPreviewMode(0)
# 0 = cache
# 1 = render
# 2 = rectangle