1 #ifndef DALI_INTERNAL_SCENE_GRAPH_PROPERTY_OWNER_H
2 #define DALI_INTERNAL_SCENE_GRAPH_PROPERTY_OWNER_H
5 * Copyright (c) 2023 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/devel-api/common/owner-container.h>
23 #include <dali/internal/common/const-string.h>
24 #include <dali/internal/common/message.h>
25 #include <dali/internal/update/animation/scene-graph-constraint-declarations.h>
26 #include <dali/internal/update/common/property-base.h>
27 #include <dali/internal/update/common/scene-graph-buffers.h>
28 #include <dali/internal/update/common/uniform-map.h>
29 #include <dali/public-api/common/dali-vector.h>
38 class ResetterManager;
40 using OwnedPropertyContainer = OwnerContainer<PropertyBase*>;
41 using OwnedPropertyIter = OwnedPropertyContainer::Iterator;
44 * An update-thread object which own properties.
45 * This allows observers to track the lifetime of the object & its properties.
54 * Called when the observable object is connected to the scene graph.
55 * @param[in] owner A reference to the connected PropertyOwner
57 virtual void PropertyOwnerConnected(PropertyOwner& owner) = 0;
60 * Called when the observable object is disconnected from the scene graph.
61 * @param[in] currentBufferIndex The buffer to reset.
62 * @param[in] owner A reference to the disconnected PropertyOwner
64 virtual void PropertyOwnerDisconnected(BufferIndex updateBufferIndex, PropertyOwner& owner) = 0;
67 * Called shortly before the observable object is destroyed.
69 * @note Cleanup should be done in both this and PropertyOwnerDisconnected as PropertyOwnerDisconnected
70 * may not be called (i.e. when shutting down).
72 virtual void PropertyOwnerDestroyed(PropertyOwner& owner) = 0;
76 * Virtual destructor, no deletion through this interface
78 virtual ~Observer() = default;
82 * Create a property owner.
83 * @return A newly allocated object.
85 static PropertyOwner* New();
88 * Virtual destructor; this is intended as a base class.
90 virtual ~PropertyOwner();
94 * The observer is responsible for calling RemoveObserver(*this) during its own destruction.
95 * Connecting an actor-side object as an observer is not allowed, due to thread-safety issues.
96 * @param[in] observer The observer.
98 void AddObserver(Observer& observer);
101 * Remove an observer.
102 * @param[in] observer The observer.
104 void RemoveObserver(Observer& observer);
107 * This method can be used to determine if there is an animation or
108 * constraint that is using this property owner.
109 * @return true if there are observers.
114 * Called just before destruction to disconnect all observers and remove constraints.
115 * This occurs when the object is in the process of being destroyed.
120 * Notify all observers that the object has been connected
121 * This occurs when the object is connected to the scene-graph during UpdateManager::Update().
123 void ConnectToSceneGraph();
126 * Notify all observers that the object has been disconnected and remove constraints.
127 * This occurs when the object is disconnected from the scene-graph during UpdateManager::Update().
128 * @param[in] currentBufferIndex The current update buffer.
130 void DisconnectFromSceneGraph(BufferIndex updateBufferIndex);
133 * Reserve the given number of properties
135 void ReserveProperties(int propertyCount);
138 * Install a custom property.
139 * @post The PropertyOwner takes ownership of the property.
140 * @param[in] property A pointer to a newly allocated property.
142 void InstallCustomProperty(OwnerPointer<PropertyBase>& property);
145 * Retrieve the custom properties owned by the object.
146 * @return A container of properties.
148 OwnedPropertyContainer& GetCustomProperties()
150 return mCustomProperties;
154 * Retrieve the custom properties owned by the object.
155 * @return A container of properties.
157 const OwnedPropertyContainer& GetCustomProperties() const
159 return mCustomProperties;
163 * Mark an property owner with the updated flag.
164 * @param[in] updated The updated flag
166 void SetUpdated(bool updated)
172 * Retrieve if the property owner is updated due to the property is being animating.
173 * @return An updated flag
183 * Apply a constraint.
184 * @param[in] constraint The constraint to apply.
186 void ApplyConstraint(OwnerPointer<ConstraintBase>& constraint);
189 * Begin removal of constraints.
190 * @param[in] constraint The constraint to remove.
192 void RemoveConstraint(ConstraintBase* constraint);
195 * Retrieve the constraints that are currently applied.
196 * @return A container of constraints.
198 ConstraintOwnerContainer& GetConstraints();
201 * @copydoc UniformMap::Add
203 virtual void AddUniformMapping(const UniformPropertyMapping& map);
206 * @copydoc UniformMap::Remove
208 virtual void RemoveUniformMapping(const ConstString& uniformName);
211 * Get the mappings table
213 const UniformMap& GetUniformMap() const;
216 * Query whether playing an animation is possible or not.
217 * @return true if playing an animation is possible.
219 virtual bool IsAnimationPossible() const
225 * @brief Install custom resetter messages to resetter manager.
226 * @pre ConnectToSceneGraph() Should be called before this API.
228 * @param[in] manager ResetterManager to add resetter.
230 virtual void AddInitializeResetter(ResetterManager& manager) const
237 * Protected constructor.
242 * Method to inform derived classes when property maps have been modified.
244 virtual void OnMappingChanged()
246 // Default behaviour is to do nothing
251 PropertyOwner(const PropertyOwner&);
254 PropertyOwner& operator=(const PropertyOwner& rhs);
257 OwnedPropertyContainer mCustomProperties; ///< Properties provided with InstallCustomProperty()
258 UniformMap mUniformMaps; ///< Container of owned uniform maps
260 bool mIsConnectedToSceneGraph;
263 using ObserverContainer = Dali::Vector<PropertyOwner::Observer*>;
264 using ObserverIter = ObserverContainer::Iterator;
265 using ConstObserverIter = ObserverContainer::ConstIterator;
267 ObserverContainer mObservers; ///< Container of observer raw-pointers (not owned)
269 ConstraintOwnerContainer mConstraints; ///< Container of owned constraints
272 } // namespace SceneGraph
274 } // namespace Internal
278 #endif // DALI_INTERNAL_SCENE_GRAPH_PROPERTY_OWNER_H