1 #ifndef __DALI_INTERNAL_OBJECT_H__
2 #define __DALI_INTERNAL_OBJECT_H__
5 * Copyright (c) 2016 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/animation/constraint.h>
23 #include <dali/public-api/common/dali-vector.h>
24 #include <dali/public-api/common/vector-wrapper.h>
25 #include <dali/public-api/object/base-object.h>
26 #include <dali/public-api/object/handle.h>
27 #include <dali/public-api/object/property.h>
28 #include <dali/public-api/object/property-index-ranges.h>
29 #include <dali/public-api/object/property-input.h>
30 #include <dali/public-api/object/property-notification.h>
31 #include <dali/devel-api/common/owner-container.h>
32 #include <dali/internal/event/common/event-thread-services.h>
33 #include <dali/internal/event/common/property-input-impl.h>
34 #include <dali/internal/event/common/property-metadata.h>
35 #include <dali/internal/update/common/property-base.h>
40 class PropertyNotification;
45 class EventThreadServices;
47 class PropertyCondition;
48 class PropertyInputImpl;
58 typedef std::vector< Dali::Constraint > ConstraintContainer;
59 typedef ConstraintContainer::iterator ConstraintIter;
60 typedef ConstraintContainer::const_iterator ConstraintConstIter;
64 * A base class for objects which optionally provide properties.
65 * The concrete derived class is responsible for implementing the property system methods.
66 * Classes may derive from Dali::BaseObject, until any properties are required.
68 * An object for a property-owning object in the scene-graph.
69 * This provides an interface for observing the addition/removal of scene-objects.
71 * The concrete derived class is responsible for:
72 * 1) Adding & removing an object from the scene-graph. The OnSceneObjectAdd() and OnSceneObjectRemove()
73 * methods should be called by the derived class, to trigger observer callbacks.
74 * 3) Implementing the GetSceneObject() methods, used to access the scene-object.
75 * 4) Providing access to properties stored by the scene-graph object. These should match the properties
76 * reported by the base Dali::Internal::Object methods.
79 class Object : public Dali::BaseObject
83 typedef Dali::Handle::Capability Capability;
90 * Called immediately after the object has created & passed ownership of a scene-graph object.
91 * @param[in] object The object object.
93 virtual void SceneObjectAdded(Object& object) = 0;
96 * Called shortly before the object sends a message to remove its scene object.
97 * @param[in] object The object object.
99 virtual void SceneObjectRemoved(Object& object) = 0;
102 * Called shortly before the object itself is destroyed; no further callbacks will be received.
103 * @param[in] object The object object.
105 virtual void ObjectDestroyed(Object& object) = 0;
112 virtual ~Observer(){}
121 * Add an observer to the object.
122 * @param[in] observer The observer to add.
124 virtual void AddObserver( Observer& observer );
127 * Remove an observer from the object
128 * @pre The observer has already been added.
129 * @param[in] observer The observer to remove.
131 virtual void RemoveObserver( Observer& observer );
134 * @copydoc Dali::Handle::Supports()
136 virtual bool Supports( Capability capability ) const;
139 * @copydoc Dali::Handle::GetPropertyCount()
141 virtual unsigned int GetPropertyCount() const;
144 * @copydoc Dali::Handle::GetPropertyName()
146 virtual std::string GetPropertyName( Property::Index index ) const;
149 * @copydoc Dali::Handle::GetPropertyIndex()
151 virtual Property::Index GetPropertyIndex( const std::string& name ) const;
154 * @copydoc Dali::Handle::IsPropertyWritable()
156 virtual bool IsPropertyWritable( Property::Index index ) const;
159 * @copydoc Dali::Handle::IsPropertyAnimatable()
161 virtual bool IsPropertyAnimatable( Property::Index index ) const;
164 * @copydoc Dali::Handle::IsPropertyAConstraintInput()
166 virtual bool IsPropertyAConstraintInput( Property::Index index ) const;
169 * @copydoc Dali::Handle::GetPropertyType()
171 virtual Property::Type GetPropertyType( Property::Index index ) const;
174 * @copydoc Dali::Handle::SetProperty()
176 virtual void SetProperty( Property::Index index, const Property::Value& propertyValue );
179 * @copydoc Dali::Handle::GetProperty()
181 virtual Property::Value GetProperty( Property::Index index ) const;
184 * @copydoc Dali::Handle::GetPropertyIndices()
186 virtual void GetPropertyIndices( Property::IndexContainer& indices ) const;
189 * @copydoc Dali::Handle::RegisterProperty()
191 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue );
194 * @copydoc Dali::Handle::RegisterProperty(std::string name, Property::Value propertyValue, Property::AccessMode accessMode)
196 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue, Property::AccessMode accessMode );
199 * @copydoc Dali::Handle::AddPropertyNotification()
201 virtual Dali::PropertyNotification AddPropertyNotification( Property::Index index,
203 const Dali::PropertyCondition& condition );
206 * @copydoc Dali::Handle::RemovePropertyNotification()
208 virtual void RemovePropertyNotification( Dali::PropertyNotification propertyNotification );
211 * @copydoc Dali::Handle::RemovePropertyNotifications()
213 virtual void RemovePropertyNotifications();
215 /******************************** Uniform Mappings ********************************/
218 * @copydoc Dali::Handle::AddUniformMapping()
220 void AddUniformMapping( Property::Index propertyIndex, const std::string& uniformName ) const;
223 * @copydoc Dali::Handle::RemoveUniformMapping( )
225 void RemoveUniformMapping( const std::string& uniformName );
227 /******************************** Constraints ********************************/
230 * Apply a constraint to an Object.
231 * @param[in] constraint The constraint to apply.
233 void ApplyConstraint( ConstraintBase& constraint );
236 * Remove one constraint from an Object.
237 * @param[in] constraint The constraint to remove.
239 void RemoveConstraint( ConstraintBase& constraint );
242 * Remove all constraints from a Object.
244 void RemoveConstraints();
247 * Remove all constraints from a Object with a matching tag
249 void RemoveConstraints( unsigned int tag );
252 * Called by TypeInfo to set the type-info that this object-impl is created by.
253 * @param[in] typeInfo The TypeInfo that creates this object-impl.
255 void SetTypeInfo( const TypeInfo* typeInfo );
258 * @return the index from which custom properties start
260 unsigned int CustomPropertyStartIndex()
262 return PROPERTY_CUSTOM_START_INDEX;
265 /******************** To be overridden by deriving classes ********************/
268 * Retrieve the scene-graph object added by this object.
269 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
271 virtual const SceneGraph::PropertyOwner* GetSceneObject() const = 0;
274 * Retrieve an animatable property owned by the scene-graph object.
275 * @pre -1 < index < GetPropertyCount().
276 * @param[in] index The index of the property.
277 * @return A dereferenceable pointer to a property, or NULL if a scene-object does not exist with this property.
279 virtual const SceneGraph::PropertyBase* GetSceneObjectAnimatableProperty( Property::Index index ) const = 0;
282 * Retrieve a constraint input-property owned by the scene-graph object.
283 * @pre -1 < index < GetPropertyCount().
284 * @param[in] index The index of the property.
285 * @return A dereferenceable pointer to an input property, or NULL if a scene-object does not exist with this property.
287 virtual const PropertyInputImpl* GetSceneObjectInputProperty( Property::Index index ) const = 0;
290 * Query whether the property is a component of a scene-graph property.
291 * @pre -1 < index < GetPropertyCount().
292 * @param[in] index The index of the property.
293 * @return The index or Property::INVALID_COMPONENT_INDEX.
295 virtual int GetPropertyComponentIndex( Property::Index index ) const;
300 * A reference counted object may only be deleted by calling Unreference()
305 * Called immediately by derived classes, after the scene-object has been created & passed to the scene-graph.
307 void OnSceneObjectAdd();
310 * Called by derived classes, shortly before send a message to remove the scene-object.
312 void OnSceneObjectRemove();
315 * For overriding by derived classes to return the parent of this object.
317 virtual Object* GetParentObject() const
319 // By default the Object does not have a parent
324 * For use in derived classes.
325 * This is called after a property is set.
326 * @param [in] index The index of the property.
327 * @param [in] propertyValue The value of the property.
329 virtual void OnPropertySet( Property::Index index, Property::Value propertyValue ) {}
332 * Retrieves the TypeInfo for this object. Only retrieves it from the type-registry once and then stores a pointer
333 * to it locally there-after. The type info will not change during the life-time of the application.
334 * @return The type-info for this object (Can be NULL)
336 const TypeInfo* GetTypeInfo() const;
339 * Helper to find custom property
341 * @return pointer to the property
343 CustomPropertyMetadata* FindCustomProperty( Property::Index index ) const;
346 * Helper to find animatable property
348 * @return pointer to the property
350 AnimatablePropertyMetadata* FindAnimatableProperty( Property::Index index ) const;
353 * Helper to register a scene-graph property
354 * @param [in] name The name of the property.
355 * @param [in] index The index of the property
356 * @param [in] value The value of the property.
357 * @return The index of the registered property or Property::INVALID_INDEX if registration failed.
359 Property::Index RegisterSceneGraphProperty(const std::string& name, Property::Index index, const Property::Value& propertyValue) const;
362 * Check whether the animatable property is registered already, if not then register one.
363 * @param [in] index The index of the property
364 * @return pointer to the property.
366 AnimatablePropertyMetadata* RegisterAnimatableProperty(Property::Index index) const;
369 * Resolve the index and name of child properties if any.
371 void ResolveChildProperties();
373 private: // Default property extensions for derived classes
376 * Query how many default properties the derived class supports.
377 * @return The number of default properties.
379 virtual unsigned int GetDefaultPropertyCount() const = 0;
382 * Retrieve all the indices that are associated with the default properties supported by the derived class.
383 * @return A container of default property indices.
384 * @note The deriving class must not modify the existing elements in the container.
386 virtual void GetDefaultPropertyIndices( Property::IndexContainer& indices ) const = 0;
389 * Query how many default properties the derived class supports.
390 * @return The number of default properties.
392 virtual const char* GetDefaultPropertyName( Property::Index index ) const = 0;
395 * Query the index of a default property.
396 * @param [in] name The name of the property.
397 * @return The index of the property, or Property::INVALID_INDEX if no default property exists with the given name.
399 virtual Property::Index GetDefaultPropertyIndex( const std::string& name ) const = 0;
402 * Query whether a default property is writable.
403 * @param [in] index The index of the property.
404 * @return True if the property is animatable.
406 virtual bool IsDefaultPropertyWritable( Property::Index index ) const = 0;
409 * Query whether a default property is animatable.
410 * This determines whether the property can be the target of an animation or constraint.
411 * @param [in] index The index of the property.
412 * @return True if the property is animatable.
414 virtual bool IsDefaultPropertyAnimatable( Property::Index index ) const = 0;
417 * @brief Query whether a default property can be used as an input to a constraint.
419 * @param [in] index The index of the property.
420 * @return True if the property can be used as an input to a constraint.
422 virtual bool IsDefaultPropertyAConstraintInput( Property::Index index ) const = 0;
425 * Query the type of a default property.
426 * @param [in] index The index of the property.
427 * @return The type of the property.
429 virtual Property::Type GetDefaultPropertyType( Property::Index index ) const = 0;
432 * Set the value of a default property.
433 * @pre The property types match i.e. propertyValue.GetType() is equal to GetPropertyType(index).
434 * @param [in] index The index of the property.
435 * @param [in] propertyValue The new value of the property.
437 virtual void SetDefaultProperty( Property::Index index, const Property::Value& propertyValue ) = 0;
440 * Retrieve a default property value.
441 * @param [in] index The index of the property.
442 * @return The property value.
444 virtual Property::Value GetDefaultProperty( Property::Index index ) const = 0;
447 * @todo this is virtual so that for now actor can override it,
448 * it needs to be removed and only have GetSceneObject but that requires changing actor and constraint logic
449 * Retrieve the scene-graph object added by this object.
450 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
452 virtual const SceneGraph::PropertyOwner* GetPropertyOwner() const
454 return GetSceneObject();
458 * Notify derived class of installation of a new scene-object property.
459 * This method is called after the message is to sent to install the property
460 * @param [in] newProperty A newly allocated scene-object property. Ownership is obviously not passed.
461 * @param [in] name The name allocated to this custom property.
462 * @param [in] index The index allocated to this custom property.
464 virtual void NotifyScenePropertyInstalled( const SceneGraph::PropertyBase& newProperty, const std::string& name, unsigned int index ) const
470 Object(const Object& rhs);
473 Object& operator=(const Object& rhs);
476 * Enable property notifications in scene graph
478 void EnablePropertyNotifications();
481 * Enable property notifications in scene graph
483 void DisablePropertyNotifications();
486 * Get the value of the property.
487 * @param [in] entry An entry from the property lookup container.
488 * @return The new value of the property.
490 Property::Value GetPropertyValue( const PropertyMetadata* entry ) const;
493 * Set the value of scene graph property.
494 * @param [in] index The index of the property.
495 * @param [in] entry An entry from the property lookup container.
496 * @param [in] value The new value of the property.
498 virtual void SetSceneGraphProperty( Property::Index index, const PropertyMetadata& entry, const Property::Value& value );
502 * Get the event thread services object - used for sending messages to the scene graph
503 * Assert if called from the wrong thread.
504 * This is intentionally inline for performance reasons.
506 * @return The event thread services object
508 inline EventThreadServices& GetEventThreadServices()
510 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
511 return mEventThreadServices;
515 * Get the event thread services object - used for sending messages to the scene graph
516 * Assert if called from the wrong thread
517 * This is intentionally inline for performance reasons.
519 * @return The event thread services object
521 inline const EventThreadServices& GetEventThreadServices() const
523 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
524 return mEventThreadServices;
528 EventThreadServices& mEventThreadServices;
532 typedef OwnerContainer<PropertyMetadata*> PropertyMetadataLookup;
533 mutable PropertyMetadataLookup mCustomProperties; ///< Used for accessing custom Node properties
534 mutable PropertyMetadataLookup mAnimatableProperties; ///< Used for accessing animatable Node properties
535 mutable TypeInfo const * mTypeInfo; ///< The type-info for this object, mutable so it can be lazy initialized from const method if it is required
537 Dali::Vector<Observer*> mObservers;
539 ConstraintContainer* mConstraints; ///< Container of owned -constraints.
541 typedef std::vector< Dali::PropertyNotification > PropertyNotificationContainer;
542 typedef PropertyNotificationContainer::iterator PropertyNotificationContainerIter;
543 typedef PropertyNotificationContainer::const_iterator PropertyNotificationContainerConstIter;
544 PropertyNotificationContainer* mPropertyNotifications; ///< Container of owned property notifications.
546 } // namespace Internal
548 // Helpers for public-api forwarding methods
550 inline Internal::Object& GetImplementation(Dali::Handle& object)
552 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
554 BaseObject& handle = object.GetBaseObject();
556 return static_cast<Internal::Object&>(handle);
559 inline const Internal::Object& GetImplementation(const Dali::Handle& object)
561 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
563 const BaseObject& handle = object.GetBaseObject();
565 return static_cast<const Internal::Object&>(handle);
570 #endif // __DALI_INTERNAL_OBJECT_H__