1 #ifndef __DALI_INTERNAL_OBJECT_H__
2 #define __DALI_INTERNAL_OBJECT_H__
5 * Copyright (c) 2017 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;
46 class EventThreadServices;
48 class PropertyCondition;
49 class PropertyInputImpl;
59 typedef std::vector< Dali::Constraint > ConstraintContainer;
60 typedef ConstraintContainer::iterator ConstraintIter;
61 typedef ConstraintContainer::const_iterator ConstraintConstIter;
65 * A base class for objects which optionally provide properties.
66 * The concrete derived class is responsible for implementing the property system methods.
67 * Classes may derive from Dali::BaseObject, until any properties are required.
69 * An object for a property-owning object in the scene-graph.
70 * This provides an interface for observing the addition/removal of scene-objects.
72 * The concrete derived class is responsible for:
73 * 1) Adding & removing an object from the scene-graph. The OnSceneObjectAdd() and OnSceneObjectRemove()
74 * methods should be called by the derived class, to trigger observer callbacks.
75 * 3) Implementing the GetSceneObject() methods, used to access the scene-object.
76 * 4) Providing access to properties stored by the scene-graph object. These should match the properties
77 * reported by the base Dali::Internal::Object methods.
80 class Object : public Dali::BaseObject
85 * Used by NotifyPropertyAnimation to differentiate between an AnimateTo and AnimateBy call.
91 SET, ///< Animating to the given value.
92 ADJUST_VALUE_BY ///< Animating by the given value.
96 typedef Dali::Handle::Capability Capability;
103 * Called immediately after the object has created & passed ownership of a scene-graph object.
104 * @param[in] object The object object.
106 virtual void SceneObjectAdded(Object& object) = 0;
109 * Called shortly before the object sends a message to remove its scene object.
110 * @param[in] object The object object.
112 virtual void SceneObjectRemoved(Object& object) = 0;
115 * Called shortly before the object itself is destroyed; no further callbacks will be received.
116 * @param[in] object The object object.
118 virtual void ObjectDestroyed(Object& object) = 0;
125 virtual ~Observer(){}
134 * Add an observer to the object.
135 * @param[in] observer The observer to add.
137 virtual void AddObserver( Observer& observer );
140 * Remove an observer from the object
141 * @pre The observer has already been added.
142 * @param[in] observer The observer to remove.
144 virtual void RemoveObserver( Observer& observer );
147 * @copydoc Dali::Handle::Supports()
149 virtual bool Supports( Capability capability ) const;
152 * @copydoc Dali::Handle::GetPropertyCount()
154 virtual unsigned int GetPropertyCount() const;
157 * @copydoc Dali::Handle::GetPropertyName()
159 virtual std::string GetPropertyName( Property::Index index ) const;
162 * @copydoc Dali::Handle::GetPropertyIndex()
164 virtual Property::Index GetPropertyIndex( const std::string& name ) const;
167 * @copydoc Dali::Handle::GetPropertyIndex()
169 virtual Property::Index GetPropertyIndex( Property::Index key ) const;
172 * @copydoc Dali::Handle::GetPropertyIndex()
174 virtual Property::Index GetPropertyIndex( Property::Key key ) const;
177 * @copydoc Dali::Handle::IsPropertyWritable()
179 virtual bool IsPropertyWritable( Property::Index index ) const;
182 * @copydoc Dali::Handle::IsPropertyAnimatable()
184 virtual bool IsPropertyAnimatable( Property::Index index ) const;
187 * @copydoc Dali::Handle::IsPropertyAConstraintInput()
189 virtual bool IsPropertyAConstraintInput( Property::Index index ) const;
192 * @copydoc Dali::Handle::GetPropertyType()
194 virtual Property::Type GetPropertyType( Property::Index index ) const;
197 * @copydoc Dali::Handle::SetProperty()
199 virtual void SetProperty( Property::Index index, const Property::Value& propertyValue );
202 * @copydoc Dali::Handle::GetProperty()
204 virtual Property::Value GetProperty( Property::Index index ) const;
207 * @brief Retrieves the latest value of the property on the scene-graph.
208 * @param[in] index The index of the property required.
209 * @return The latest value of the property on the scene-graph.
211 virtual Property::Value GetCurrentProperty( Property::Index index ) const;
214 * @copydoc Dali::Handle::GetPropertyIndices()
216 virtual void GetPropertyIndices( Property::IndexContainer& indices ) const;
219 * @copydoc Dali::Handle::RegisterProperty()
221 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue );
224 * @copydoc Dali::Handle::RegisterProperty()
226 virtual Property::Index RegisterProperty( const std::string& name, Property::Index key, const Property::Value& propertyValue );
229 * @copydoc Dali::Handle::RegisterProperty(std::string name, Property::Value propertyValue, Property::AccessMode accessMode)
231 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue, Property::AccessMode accessMode );
234 * @brief Implementing method for this override
236 virtual Property::Index RegisterProperty( const std::string& name, Property::Index key, const Property::Value& propertyValue, Property::AccessMode accessMode );
239 * @copydoc Dali::Handle::AddPropertyNotification()
241 virtual Dali::PropertyNotification AddPropertyNotification( Property::Index index,
243 const Dali::PropertyCondition& condition );
246 * @copydoc Dali::Handle::RemovePropertyNotification()
248 virtual void RemovePropertyNotification( Dali::PropertyNotification propertyNotification );
251 * @copydoc Dali::Handle::RemovePropertyNotifications()
253 virtual void RemovePropertyNotifications();
256 * Notifies that a property is being animated.
257 * @param[in] animation The animation animating the property.
258 * @param[in] index The index of the property.
259 * @param[in] value The value of the property after the animation.
260 * @param[in] propertyChangeType Whether the property value given should be set or changed by.
262 void NotifyPropertyAnimation( Animation& animation, Property::Index index, const Property::Value& value, PropertyChange::Type propertyChangeType );
264 /******************************** Uniform Mappings ********************************/
267 * @copydoc Dali::Handle::AddUniformMapping()
269 void AddUniformMapping( Property::Index propertyIndex, const std::string& uniformName ) const;
272 * @copydoc Dali::Handle::RemoveUniformMapping( )
274 void RemoveUniformMapping( const std::string& uniformName );
276 /******************************** Constraints ********************************/
279 * Apply a constraint to an Object.
280 * @param[in] constraint The constraint to apply.
282 void ApplyConstraint( ConstraintBase& constraint );
285 * Remove one constraint from an Object.
286 * @param[in] constraint The constraint to remove.
288 void RemoveConstraint( ConstraintBase& constraint );
291 * Remove all constraints from a Object.
293 void RemoveConstraints();
296 * Remove all constraints from a Object with a matching tag
298 void RemoveConstraints( unsigned int tag );
301 * Called by TypeInfo to set the type-info that this object-impl is created by.
302 * @param[in] typeInfo The TypeInfo that creates this object-impl.
304 void SetTypeInfo( const TypeInfo* typeInfo );
307 * @return the index from which custom properties start
309 unsigned int CustomPropertyStartIndex()
311 return PROPERTY_CUSTOM_START_INDEX;
314 /******************** To be overridden by deriving classes ********************/
317 * Retrieve the scene-graph object added by this object.
318 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
320 virtual const SceneGraph::PropertyOwner* GetSceneObject() const = 0;
323 * Retrieve an animatable property owned by the scene-graph object.
324 * @pre -1 < index < GetPropertyCount().
325 * @param[in] index The index of the property.
326 * @return A dereferenceable pointer to a property, or NULL if a scene-object does not exist with this property.
328 virtual const SceneGraph::PropertyBase* GetSceneObjectAnimatableProperty( Property::Index index ) const = 0;
331 * Retrieve a constraint input-property owned by the scene-graph object.
332 * @pre -1 < index < GetPropertyCount().
333 * @param[in] index The index of the property.
334 * @return A dereferenceable pointer to an input property, or NULL if a scene-object does not exist with this property.
336 virtual const PropertyInputImpl* GetSceneObjectInputProperty( Property::Index index ) const = 0;
339 * Query whether the property is a component of a scene-graph property.
340 * @pre -1 < index < GetPropertyCount().
341 * @param[in] index The index of the property.
342 * @return The index or Property::INVALID_COMPONENT_INDEX.
344 virtual int GetPropertyComponentIndex( Property::Index index ) const;
349 * A reference counted object may only be deleted by calling Unreference()
354 * Called immediately by derived classes, after the scene-object has been created & passed to the scene-graph.
356 void OnSceneObjectAdd();
359 * Called by derived classes, shortly before send a message to remove the scene-object.
361 void OnSceneObjectRemove();
364 * For overriding by derived classes to return the parent of this object.
366 virtual Object* GetParentObject() const
368 // By default the Object does not have a parent
373 * For use in derived classes.
374 * This is called after a property is set.
375 * @param [in] index The index of the property.
376 * @param [in] propertyValue The value of the property.
378 virtual void OnPropertySet( Property::Index index, Property::Value propertyValue ) {}
381 * Retrieves the TypeInfo for this object. Only retrieves it from the type-registry once and then stores a pointer
382 * to it locally there-after. The type info will not change during the life-time of the application.
383 * @return The type-info for this object (Can be NULL)
385 const TypeInfo* GetTypeInfo() const;
388 * Helper to find custom property
390 * @return pointer to the property
392 CustomPropertyMetadata* FindCustomProperty( Property::Index index ) const;
395 * Helper to find animatable property
397 * @return pointer to the property
399 AnimatablePropertyMetadata* FindAnimatableProperty( Property::Index index ) const;
402 * Helper to register a scene-graph property
403 * @param [in] name The name of the property.
404 * @param [in] key The key of the property
405 * @param [in] index The index of the property
406 * @param [in] value The value of the property.
407 * @return The index of the registered property or Property::INVALID_INDEX if registration failed.
409 Property::Index RegisterSceneGraphProperty(const std::string& name, Property::Index key, Property::Index index, const Property::Value& propertyValue) const;
412 * Check whether the animatable property is registered already, if not then register one.
413 * @param [in] index The index of the property
414 * @return pointer to the property.
416 AnimatablePropertyMetadata* RegisterAnimatableProperty(Property::Index index) const;
419 * Resolve the index and name of child properties if any.
421 void ResolveChildProperties();
423 private: // Default property extensions for derived classes
426 * Query how many default properties the derived class supports.
427 * @return The number of default properties.
429 virtual unsigned int GetDefaultPropertyCount() const = 0;
432 * Retrieve all the indices that are associated with the default properties supported by the derived class.
433 * @return A container of default property indices.
434 * @note The deriving class must not modify the existing elements in the container.
436 virtual void GetDefaultPropertyIndices( Property::IndexContainer& indices ) const = 0;
439 * Query how many default properties the derived class supports.
440 * @return The number of default properties.
442 virtual const char* GetDefaultPropertyName( Property::Index index ) const = 0;
445 * Query the index of a default property.
446 * @param [in] name The name of the property.
447 * @return The index of the property, or Property::INVALID_INDEX if no default property exists with the given name.
449 virtual Property::Index GetDefaultPropertyIndex( const std::string& name ) const = 0;
452 * Query whether a default property is writable.
453 * @param [in] index The index of the property.
454 * @return True if the property is animatable.
456 virtual bool IsDefaultPropertyWritable( Property::Index index ) const = 0;
459 * Query whether a default property is animatable.
460 * This determines whether the property can be the target of an animation or constraint.
461 * @param [in] index The index of the property.
462 * @return True if the property is animatable.
464 virtual bool IsDefaultPropertyAnimatable( Property::Index index ) const = 0;
467 * @brief Query whether a default property can be used as an input to a constraint.
469 * @param [in] index The index of the property.
470 * @return True if the property can be used as an input to a constraint.
472 virtual bool IsDefaultPropertyAConstraintInput( Property::Index index ) const = 0;
475 * Query the type of a default property.
476 * @param [in] index The index of the property.
477 * @return The type of the property.
479 virtual Property::Type GetDefaultPropertyType( Property::Index index ) const = 0;
482 * Set the value of a default property.
483 * @pre The property types match i.e. propertyValue.GetType() is equal to GetPropertyType(index).
484 * @param [in] index The index of the property.
485 * @param [in] propertyValue The new value of the property.
487 virtual void SetDefaultProperty( Property::Index index, const Property::Value& propertyValue ) = 0;
490 * Retrieve a default property value.
491 * @param [in] index The index of the property.
492 * @return The property value.
494 virtual Property::Value GetDefaultProperty( Property::Index index ) const = 0;
497 * Retrieve the latest scene-graph value of a default property.
498 * @param[in] index The index of the property.
499 * @return The latest scene-graph value of a default property.
501 virtual Property::Value GetDefaultPropertyCurrentValue( Property::Index index ) const = 0;
504 * Notifies that a default property is being animated so the deriving class should update the cached value.
505 * @param[in] animation The animation animating the property.
506 * @param[in] index The index of the property.
507 * @param[in] value The value of the property after the animation.
508 * @param[in] propertyChangeType Whether the property value given should be set or changed by.
510 virtual void OnNotifyDefaultPropertyAnimation( Animation& animation, Property::Index index, const Property::Value& value, PropertyChange::Type propertyChangeType )
514 * @todo this is virtual so that for now actor can override it,
515 * it needs to be removed and only have GetSceneObject but that requires changing actor and constraint logic
516 * Retrieve the scene-graph object added by this object.
517 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
519 virtual const SceneGraph::PropertyOwner* GetPropertyOwner() const
521 return GetSceneObject();
525 * Notify derived class of installation of a new scene-object property.
526 * This method is called after the message is to sent to install the property
527 * @param [in] newProperty A newly allocated scene-object property. Ownership is obviously not passed.
528 * @param [in] name The name allocated to this custom property.
529 * @param [in] index The index allocated to this custom property.
531 virtual void NotifyScenePropertyInstalled( const SceneGraph::PropertyBase& newProperty, const std::string& name, unsigned int index ) const
537 Object(const Object& rhs);
540 Object& operator=(const Object& rhs);
543 * Enable property notifications in scene graph
545 void EnablePropertyNotifications();
548 * Enable property notifications in scene graph
550 void DisablePropertyNotifications();
553 * Get the latest value of the property on the scene-graph.
554 * @param[in] entry An entry from the property lookup container.
555 * @return The latest value of the property.
557 Property::Value GetCurrentPropertyValue( const PropertyMetadata* entry ) const;
560 * Set the value of scene graph property.
561 * @param [in] index The index of the property.
562 * @param [in] entry An entry from the property lookup container.
563 * @param [in] value The new value of the property.
565 virtual void SetSceneGraphProperty( Property::Index index, const PropertyMetadata& entry, const Property::Value& value );
569 * Get the event thread services object - used for sending messages to the scene graph
570 * Assert if called from the wrong thread.
571 * This is intentionally inline for performance reasons.
573 * @return The event thread services object
575 inline EventThreadServices& GetEventThreadServices()
577 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
578 return mEventThreadServices;
582 * Get the event thread services object - used for sending messages to the scene graph
583 * Assert if called from the wrong thread
584 * This is intentionally inline for performance reasons.
586 * @return The event thread services object
588 inline const EventThreadServices& GetEventThreadServices() const
590 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
591 return mEventThreadServices;
595 EventThreadServices& mEventThreadServices;
599 typedef OwnerContainer<PropertyMetadata*> PropertyMetadataLookup;
600 mutable PropertyMetadataLookup mCustomProperties; ///< Used for accessing custom Node properties
601 mutable PropertyMetadataLookup mAnimatableProperties; ///< Used for accessing animatable Node properties
602 mutable TypeInfo const * mTypeInfo; ///< The type-info for this object, mutable so it can be lazy initialized from const method if it is required
604 Dali::Vector<Observer*> mObservers;
606 ConstraintContainer* mConstraints; ///< Container of owned -constraints.
608 typedef std::vector< Dali::PropertyNotification > PropertyNotificationContainer;
609 typedef PropertyNotificationContainer::iterator PropertyNotificationContainerIter;
610 typedef PropertyNotificationContainer::const_iterator PropertyNotificationContainerConstIter;
611 PropertyNotificationContainer* mPropertyNotifications; ///< Container of owned property notifications.
613 } // namespace Internal
615 // Helpers for public-api forwarding methods
617 inline Internal::Object& GetImplementation(Dali::Handle& object)
619 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
621 BaseObject& handle = object.GetBaseObject();
623 return static_cast<Internal::Object&>(handle);
626 inline const Internal::Object& GetImplementation(const Dali::Handle& object)
628 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
630 const BaseObject& handle = object.GetBaseObject();
632 return static_cast<const Internal::Object&>(handle);
637 #endif // __DALI_INTERNAL_OBJECT_H__