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docs: Mention the DELEGATE_LAYOUT flag in set_allocation()
With code examples.
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@ -7765,7 +7765,51 @@ clutter_actor_allocate (ClutterActor *self,
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*
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* If the #ClutterActor is using a #ClutterLayoutManager delegate object
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* to handle the allocation of its children, this function will call
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* the clutter_layout_manager_allocate() function.
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* the clutter_layout_manager_allocate() function only if the
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* %CLUTTER_DELEGATE_LAYOUT flag is set on @flags, otherwise it is
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* expected that the subclass will call clutter_layout_manager_allocate()
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* by itself. For instance, the following code:
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*
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* |[
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* static void
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* my_actor_allocate (ClutterActor *actor,
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* const ClutterActorBox *allocation,
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* ClutterAllocationFlags flags)
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* {
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* ClutterActorBox new_alloc;
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* ClutterAllocationFlags new_flags;
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*
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* adjust_allocation (allocation, &new_alloc);
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*
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* new_flags = flags | CLUTTER_DELEGATE_LAYOUT;
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*
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* /* this will use the layout manager set on the actor */
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* clutter_actor_set_allocation (actor, &new_alloc, new_flags);
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* }
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* ]|
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*
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* is equivalent to this:
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*
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* |[
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* static void
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* my_actor_allocate (ClutterActor *actor,
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* const ClutterActorBox *allocation,
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* ClutterAllocationFlags flags)
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* {
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* ClutterLayoutManager *layout;
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* ClutterActorBox new_alloc;
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*
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* adjust_allocation (allocation, &new_alloc);
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*
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* clutter_actor_set_allocation (actor, &new_alloc, flags);
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*
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* layout = clutter_actor_get_layout_manager (actor);
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* clutter_layout_manager_allocate (layout,
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* CLUTTER_CONTAINER (actor),
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* &new_alloc,
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* flags);
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* }
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* ]|
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*
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* Since: 1.10
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*/
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