1 #ifndef __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__
2 #define __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__
5 * Copyright (c) 2019 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.
25 #include <dali/public-api/common/vector-wrapper.h>
26 #include <dali/public-api/object/base-object.h>
27 #include <dali/public-api/size-negotiation/relayout-container.h>
28 #include <dali/internal/common/memory-pool-object-allocator.h>
29 #include <dali/internal/event/size-negotiation/memory-pool-relayout-container.h>
36 class RenderController;
43 * @brief The relayout controller is responsible for taking request from actors to relayout their sizes.
44 * The requests are actioned on at the end of the frame where all actors that have made a request are
47 class RelayoutController : public Dali::BaseObject
53 * We should only create a unique instance.
54 * @param[in] controller to request a render from the RenderController if core is not processing events.
56 RelayoutController( Integration::RenderController& controller );
61 virtual ~RelayoutController();
64 * @brief Get the singleton of RelayoutController object.
66 * @return A handle to the RelayoutController control.
68 static RelayoutController* Get();
71 * @brief Request to relayout the given actor and all sub-actors of it.
73 * This flags the actor and all actors dependent on it for relayout. The actual
74 * relayout is performed at the end of the frame. This means that multiple calls to relayout
75 * will not cause multiple relayouts to occur.
77 * @param[in] actor The actor to request relayout on
78 * @param[in] dimension The dimension(s) to request the relayout on. Defaults to all dimensions
80 void RequestRelayout( Dali::Actor& actor, Dimension::Type dimension = Dimension::ALL_DIMENSIONS );
83 * @brief Request to relayout of all actors in the sub-tree below the given actor.
85 * This flags the actor and all actors below it for relayout. The actual
86 * relayout is performed at the end of the frame. This means that multiple calls to relayout
87 * will not cause multiple relayouts to occur.
89 * @param[in] actor The actor to request relayout on
91 void RequestRelayoutTree( Dali::Actor& actor );
94 * @brief Force propagate relayout flags through the tree. This is similiar to Request Relayout
95 * except all dependencies have their flags reset in spite of whether they are all ready set.
97 * This is useful for resetting layout flags during the layout process.
99 * @param[in] actor The actor to propagate from
100 * @param[in] dimension The dimension to propagate on
102 void PropagateFlags( Dali::Actor& actor, Dimension::Type dimension = Dimension::ALL_DIMENSIONS );
105 * @brief Relayouts all actors that have been marked as dirty
110 * @brief Enable/disable the controller
112 * @param[in] enabled Flag to indicate whether the controller should be enabled or disabled
114 void SetEnabled( bool enabled );
117 * @brief Return true if the relayout controller is currently performing a relayout
119 * @return Return true if the relayout controller is currently performing a relayout
121 bool IsPerformingRelayout() const;
124 * @brief Sets whether core is processing events.
126 * @param[in] processingEvents whether core is processing events.
128 void SetProcessingCoreEvents( bool processingEvents );
133 * @brief Callback raised after the application creates the scene
135 void OnApplicationSceneCreated();
138 * @brief Callback for when an object is destroyed
140 * @param[in] object The object being destroyed
142 void OnObjectDestroyed( const Dali::RefObject* object );
146 using RawActorList = Dali::Vector< Dali::Internal::Actor* >;
149 * @brief Request for relayout. Relays out whole scene.
154 * @brief Add actor to request list
156 * @param[in] actor The root of the sub tree to add
158 void AddRequest( Dali::Actor& actor );
161 * @brief Remove actor from request list
163 * @param[in] actor The root of the sub tree to remove
165 void RemoveRequest( Dali::Actor& actor );
168 * @brief Disconnect the Relayout() method from the Stage::EventProcessingFinishedSignal().
173 * @brief Propagate dirty layout flags to actor and all sub-actors. This will stop propagating when a dirty actor
176 * @param[in] actor The actor to propagate on
177 * @param[in] dimension The dimension to propagate on
178 * @param[in] topOfSubTreeStack The top of the sub tree that this actor is in
179 * @param[in] potentialRedundantSubRoots Actors collected as potentially already being included in relayout
181 void PropagateAll( Dali::Actor& actor, Dimension::Type dimension, std::vector< Dali::Actor >& topOfSubTreeStack, std::vector< Dali::Actor >& potentialRedundantSubRoots );
184 * Queue an actor on the relayout container
186 * @param[in] actor The actor to be queued
187 * @param[in] actors The container to add the actor to
188 * @param[in] size The size that this actor should be
190 void QueueActor( Internal::Actor* actor, RelayoutContainer& actors, Vector2 size );
193 * @brief Find the given object in the list and null it out
195 * @param[in] list The list to search
196 * @param[in] object The object to search for
198 void FindAndZero( const RawActorList& list, const Dali::RefObject* object );
201 RelayoutController(const RelayoutController&) = delete;
202 RelayoutController& operator=(const RelayoutController&) = delete;
206 Integration::RenderController& mRenderController;
207 MemoryPoolObjectAllocator< MemoryPoolRelayoutContainer::RelayoutInfo > mRelayoutInfoAllocator;
209 SlotDelegate< RelayoutController > mSlotDelegate;
211 RawActorList mDirtyLayoutSubTrees; ///< List of roots of sub trees that are dirty
212 MemoryPoolRelayoutContainer* mRelayoutStack; ///< Stack for relayouting
214 bool mRelayoutConnection : 1; ///< Whether EventProcessingFinishedSignal signal is connected.
215 bool mRelayoutFlag : 1; ///< Relayout flag to avoid unnecessary calls
216 bool mEnabled : 1; ///< Initially disabled. Must be enabled at some point.
217 bool mPerformingRelayout : 1; ///< The relayout controller is currently performing a relayout
218 bool mProcessingCoreEvents : 1; ///< Whether core is processing events.
222 } // namespace Internal
226 #endif // __DALI_INTERNAL_RELAYOUT_CONTROLLER_IMPL_H__