Scene Handling¶

The ‘Scene’ is a singleton class which may be used to interact with maya’s currently opened scene and to manage scene messages. It is a mix of functionality from the file MEL command and the MSceneMessage API type. The following example uses utilities and scenes from the test system:

import mrv.maya as mrv
empty_scene = get_maya_file('empty.ma')
mrv.Scene.open(empty_scene, force=1)
assert mrv.Scene.name() == empty_scene

files = list()
def beforeAndAfterNewCB( data ):
        assert data is None
        files.append(mrv.Scene.name())

mrv.Scene.beforeNew = beforeAndAfterNewCB
mrv.Scene.afterNew = beforeAndAfterNewCB

assert len(files) == 0
mrv.Scene.new()
assert len(files) == 2
assert files[0] == empty_scene

It is important to remove callbacks once you are done with them to allow the corresponding maya callbacks to be cleaned up properly:

mrv.Scene.beforeNew.remove(beforeAndAfterNewCB)
mrv.Scene.afterNew.remove(beforeAndAfterNewCB)

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