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
ClutterLayoutManager does not have any state associated with it, and defers all the state to its sub-classes. The BoxLayout is thus in charge of controlling: • whether or not animations should be used • the duration of the animation • the easing mode of the animation By adding three new properties: • ClutterBoxLayout:use-animations • ClutterBoxLayout:easing-duration • ClutterBoxLayout:easing-mode And their relative accessors pairs we can make BoxLayout decide whether or not, and with which parameters, call the begin_animation() method of ClutterLayoutManager. The test-box-layout has been modified to reflect this new functionality, by checking the key-press event for the 'a' key symbol to toggle the use of animations.