1 #ifndef __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__
2 #define __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__
5 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/common/vector-wrapper.h>
23 #include <dali/public-api/object/base-object.h>
24 #include <dali/public-api/size-negotiation/relayout-container.h>
26 #include <dali/internal/common/memory-pool-object-allocator.h>
27 #include <dali/internal/event/size-negotiation/memory-pool-relayout-container.h>
36 * @brief The relayout controller is responsible for taking request from actors to relayout their sizes.
37 * The requests are actioned on at the end of the frame where all actors that have made a request are
40 class RelayoutController : public Dali::BaseObject
46 * We should only create a unique instance.
53 virtual ~RelayoutController();
56 * @brief Get the singleton of RelayoutController object.
58 * @return A handle to the RelayoutController control.
60 static RelayoutController* Get();
63 * @brief Request to relayout the given actor and all sub-actors of it.
65 * This flags the actor and all actors dependent on it for relayout. The actual
66 * relayout is performed at the end of the frame. This means that multiple calls to relayout
67 * will not cause multiple relayouts to occur.
69 * @param[in] actor The actor to request relayout on
70 * @param[in] dimension The dimension(s) to request the relayout on. Defaults to all dimensions
72 void RequestRelayout( Dali::Actor& actor, Dimension dimension = ALL_DIMENSIONS );
75 * @brief Request to relayout of all actors in the sub-tree below the given actor.
77 * This flags the actor and all actors below it for relayout. The actual
78 * relayout is performed at the end of the frame. This means that multiple calls to relayout
79 * will not cause multiple relayouts to occur.
81 * @param[in] actor The actor to request relayout on
83 void RequestRelayoutTree( Dali::Actor& actor );
86 * @brief Force propagate relayout flags through the tree. This is similiar to Request Relayout
87 * except all dependencies have their flags reset in spite of whether they are all ready set.
89 * This is useful for resetting layout flags during the layout process.
91 * @param[in] actor The actor to propagate from
92 * @param[in] dimension The dimension to propagate on
94 void PropagateFlags( Dali::Actor& actor, Dimension dimension = ALL_DIMENSIONS );
97 * @brief Relayouts all actors that have been marked as dirty
102 * @brief Enable/disable the controller
104 * @param[in] enabled Flag to indicate whether the controller should be enabled or disabled
106 void SetEnabled( bool enabled );
111 * @brief Callback raised after the application creates the scene
113 void OnApplicationSceneCreated();
116 * @brief Callback for when an object is destroyed
118 * @param[in] object The object being destroyed
120 void OnObjectDestroyed( const Dali::RefObject* object );
124 typedef Dali::Vector< BaseObject* > RawActorList;
127 * @brief Request for relayout. Relays out whole scene.
132 * @brief Add actor to request list
134 * @param[in] actor The root of the sub tree to add
136 void AddRequest( Dali::Actor& actor );
139 * @brief Remove actor from request list
141 * @param[in] actor The root of the sub tree to remove
143 void RemoveRequest( Dali::Actor& actor );
146 * @brief Disconnect the Relayout() method from the Stage::EventProcessingFinishedSignal().
151 * @brief Propagate dirty layout flags to actor and all sub-actors. This will stop propagating when a dirty actor
154 * @param[in] actor The actor to propagate on
155 * @param[in] dimension The dimension to propagate on
156 * @param[in] topOfSubTreeStack The top of the sub tree that this actor is in
157 * @param[in] potentialRedundantSubRoots Actors collected as potentially already being included in relayout
159 void PropagateAll( Dali::Actor& actor, Dimension dimension, Dali::ActorContainer& topOfSubTreeStack, Dali::ActorContainer& potentialRedundantSubRoots );
162 * Queue an actor on the relayout container
164 * @param[in] actor The actor to be queued
165 * @param[in] actors The container to add the actor to
166 * @param[in] size The size that this actor should be
168 void QueueActor( Dali::Actor& actor, RelayoutContainer& actors, Vector2 size );
171 * @brief Find the given object in the list and null it out
173 * @param[in] list The list to search
174 * @param[in] object The object to search for
176 void FindAndZero( const RawActorList& list, const Dali::RefObject* object );
179 RelayoutController(const RelayoutController&);
180 RelayoutController& operator=(const RelayoutController&);
184 MemoryPoolObjectAllocator< MemoryPoolRelayoutContainer::RelayoutInfo > mRelayoutInfoAllocator;
186 SlotDelegate< RelayoutController > mSlotDelegate;
188 RawActorList mDirtyLayoutSubTrees; ///< List of roots of sub trees that are dirty
189 MemoryPoolRelayoutContainer* mRelayoutStack; ///< Stack for relayouting
190 bool mRelayoutConnection : 1; ///< Whether EventProcessingFinishedSignal signal is connected.
191 bool mRelayoutFlag : 1; ///< Relayout flag to avoid unnecessary calls
192 bool mEnabled : 1; ///< Initially disabled. Must be enabled at some point.
196 } // namespace Internal
200 #endif // __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__