1 #ifndef __DALI_INTERNAL_OBJECT_H__
2 #define __DALI_INTERNAL_OBJECT_H__
5 * Copyright (c) 2014 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/internal/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;
63 * A base class for objects which optionally provide properties.
64 * The concrete derived class is responsible for implementing the property system methods.
65 * Classes may derive from Dali::BaseObject, until any properties are required.
67 * An object for a property-owning object in the scene-graph.
68 * This provides an interface for observing the addition/removal of scene-objects.
70 * The concrete derived class is responsible for:
71 * 1) Adding & removing an object from the scene-graph. The OnSceneObjectAdd() and OnSceneObjectRemove()
72 * methods should be called by the derived class, to trigger observer callbacks.
73 * 3) Implementing the GetSceneObject() methods, used to access the scene-object.
74 * 4) Providing access to properties stored by the scene-graph object. These should match the properties
75 * reported by the base Dali::Internal::Object methods.
78 class Object : public Dali::BaseObject
82 typedef Dali::Handle::Capability Capability;
89 * Called immediately after the object has created & passed ownership of a scene-graph object.
90 * @param[in] object The object object.
92 virtual void SceneObjectAdded(Object& object) = 0;
95 * Called shortly before the object sends a message to remove its scene object.
96 * @param[in] object The object object.
98 virtual void SceneObjectRemoved(Object& object) = 0;
101 * Called shortly before the object itself is destroyed; no further callbacks will be received.
102 * @param[in] object The object object.
104 virtual void ObjectDestroyed(Object& object) = 0;
111 virtual ~Observer(){}
120 * Add an observer to the object.
121 * @param[in] observer The observer to add.
123 virtual void AddObserver( Observer& observer );
126 * Remove an observer from the object
127 * @pre The observer has already been added.
128 * @param[in] observer The observer to remove.
130 virtual void RemoveObserver( Observer& observer );
133 * @copydoc Dali::Handle::Supports()
135 virtual bool Supports( Capability capability ) const;
138 * @copydoc Dali::Handle::GetPropertyCount()
140 virtual unsigned int GetPropertyCount() const;
143 * @copydoc Dali::Handle::GetPropertyName()
145 virtual std::string GetPropertyName( Property::Index index ) const;
148 * @copydoc Dali::Handle::GetPropertyIndex()
150 virtual Property::Index GetPropertyIndex( const std::string& name ) const;
153 * @copydoc Dali::Handle::IsPropertyWritable()
155 virtual bool IsPropertyWritable( Property::Index index ) const;
158 * @copydoc Dali::Handle::IsPropertyAnimatable()
160 virtual bool IsPropertyAnimatable( Property::Index index ) const;
163 * @copydoc Dali::Handle::IsPropertyAConstraintInput()
165 virtual bool IsPropertyAConstraintInput( Property::Index index ) const;
168 * @copydoc Dali::Handle::GetPropertyType()
170 virtual Property::Type GetPropertyType( Property::Index index ) const;
173 * @copydoc Dali::Handle::SetProperty()
175 virtual void SetProperty( Property::Index index, const Property::Value& propertyValue );
178 * @copydoc Dali::Handle::GetProperty()
180 virtual Property::Value GetProperty( Property::Index index ) const;
183 * @copydoc Dali::Handle::GetPropertyIndices()
185 virtual void GetPropertyIndices( Property::IndexContainer& indices ) const;
188 * @copydoc Dali::Handle::RegisterProperty()
190 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue );
193 * @copydoc Dali::Handle::RegisterProperty(std::string name, Property::Value propertyValue, Property::AccessMode accessMode)
195 virtual Property::Index RegisterProperty( const std::string& name, const Property::Value& propertyValue, Property::AccessMode accessMode );
198 * @copydoc Dali::Handle::AddPropertyNotification()
200 virtual Dali::PropertyNotification AddPropertyNotification( Property::Index index,
202 const Dali::PropertyCondition& condition );
205 * @copydoc Dali::Handle::RemovePropertyNotification()
207 virtual void RemovePropertyNotification( Dali::PropertyNotification propertyNotification );
210 * @copydoc Dali::Handle::RemovePropertyNotifications()
212 virtual void RemovePropertyNotifications();
217 * Apply a constraint to an Object.
218 * @param[in] constraint The constraint to apply.
220 void ApplyConstraint( ConstraintBase& constraint );
223 * Remove one constraint from an Object.
224 * @param[in] constraint The constraint to remove.
226 void RemoveConstraint( ConstraintBase& constraint );
229 * Remove all constraints from a Object.
231 void RemoveConstraints();
234 * Remove all constraints from a Object with a matching tag
236 void RemoveConstraints( unsigned int tag );
239 * Called by TypeInfo to set the type-info that this object-impl is created by.
240 * @param[in] typeInfo The TypeInfo that creates this object-impl.
242 void SetTypeInfo( const TypeInfo* typeInfo );
245 * @return the index from which custom properties start
247 unsigned int CustomPropertyStartIndex()
249 return PROPERTY_CUSTOM_START_INDEX;
252 // To be overridden by deriving classes
255 * Retrieve the scene-graph object added by this object.
256 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
258 virtual const SceneGraph::PropertyOwner* GetSceneObject() const = 0;
261 * Retrieve an animatable property owned by the scene-graph object.
262 * @pre -1 < index < GetPropertyCount().
263 * @param[in] index The index of the property.
264 * @return A dereferenceable pointer to a property, or NULL if a scene-object does not exist with this property.
266 virtual const SceneGraph::PropertyBase* GetSceneObjectAnimatableProperty( Property::Index index ) const = 0;
269 * Retrieve an constraint input-property owned by the scene-graph object.
270 * @pre -1 < index < GetPropertyCount().
271 * @param[in] index The index of the property.
272 * @return A dereferenceable pointer to an input property, or NULL if a scene-object does not exist with this property.
274 virtual const PropertyInputImpl* GetSceneObjectInputProperty( Property::Index index ) const = 0;
277 * Query whether the property is a component of a scene-graph property.
278 * @pre -1 < index < GetPropertyCount().
279 * @param[in] index The index of the property.
280 * @return The index or Property::INVALID_COMPONENT_INDEX.
282 virtual int GetPropertyComponentIndex( Property::Index index ) const;
287 * A reference counted object may only be deleted by calling Unreference()
292 * Called immediately by derived classes, after the scene-object has been created & passed to the scene-graph.
294 void OnSceneObjectAdd();
297 * Called by derived classes, shortly before send a message to remove the scene-object.
299 void OnSceneObjectRemove();
302 * For use in derived classes.
303 * This is called after a non animatable custom property is set.
304 * @param [in] index The index of the property.
305 * @param [in] propertyValue The value of the property.
307 virtual void OnPropertySet( Property::Index index, Property::Value propertyValue ) {}
310 * Retrieves the TypeInfo for this object. Only retrieves it from the type-registry once and then stores a pointer
311 * to it locally there-after. The type info will not change during the life-time of the application.
312 * @return The type-info for this object (Can be NULL)
314 const TypeInfo* GetTypeInfo() const;
317 * Helper to find custom property
319 * @return pointer to the property
321 CustomPropertyMetadata* FindCustomProperty( Property::Index index ) const;
324 * Helper to find animatable property
326 * @return pointer to the property
328 AnimatablePropertyMetadata* FindAnimatableProperty( Property::Index index ) const;
331 * Helper to register a scene-graph property
332 * @param [in] name The name of the property.
333 * @param [in] index The index of the property
334 * @param [in] value The value of the property.
335 * @return The index of the registered property or Property::INVALID_INDEX if registration failed.
337 Property::Index RegisterSceneGraphProperty(const std::string& name, Property::Index index, const Property::Value& propertyValue) const;
339 private: // Default property extensions for derived classes
342 * Query how many default properties the derived class supports.
343 * @return The number of default properties.
345 virtual unsigned int GetDefaultPropertyCount() const = 0;
348 * Retrieve all the indices that are associated with the default properties supported by the derived class.
349 * @return A container of default property indices.
350 * @note The deriving class must not modify the existing elements in the container.
352 virtual void GetDefaultPropertyIndices( Property::IndexContainer& indices ) const = 0;
355 * Query how many default properties the derived class supports.
356 * @return The number of default properties.
358 virtual const char* GetDefaultPropertyName( Property::Index index ) const = 0;
361 * Query the index of a default property.
362 * @param [in] name The name of the property.
363 * @return The index of the property, or Property::INVALID_INDEX if no default property exists with the given name.
365 virtual Property::Index GetDefaultPropertyIndex( const std::string& name ) const = 0;
368 * Query whether a default property is writable.
369 * @param [in] index The index of the property.
370 * @return True if the property is animatable.
372 virtual bool IsDefaultPropertyWritable( Property::Index index ) const = 0;
375 * Query whether a default property is animatable.
376 * This determines whether the property can be the target of an animation or constraint.
377 * @param [in] index The index of the property.
378 * @return True if the property is animatable.
380 virtual bool IsDefaultPropertyAnimatable( Property::Index index ) const = 0;
383 * @brief Query whether a default property can be used as an input to a constraint.
385 * @param [in] index The index of the property.
386 * @return True if the property can be used as an input to a constraint.
388 virtual bool IsDefaultPropertyAConstraintInput( Property::Index index ) const = 0;
391 * Query the type of a default property.
392 * @param [in] index The index of the property.
393 * @return The type of the property.
395 virtual Property::Type GetDefaultPropertyType( Property::Index index ) const = 0;
398 * Set the value of a default property.
399 * @pre The property types match i.e. propertyValue.GetType() is equal to GetPropertyType(index).
400 * @param [in] index The index of the property.
401 * @param [in] propertyValue The new value of the property.
403 virtual void SetDefaultProperty( Property::Index index, const Property::Value& propertyValue ) = 0;
406 * Retrieve a default property value.
407 * @param [in] index The index of the property.
408 * @return The property value.
410 virtual Property::Value GetDefaultProperty( Property::Index index ) const = 0;
413 * @todo this is virtual so that for now actor can override it,
414 * it needs to be removed and only have GetSceneObject but that requires changing actor and constraint logic
415 * Retrieve the scene-graph object added by this object.
416 * @return A pointer to the object, or NULL if no object has been added to the scene-graph.
418 virtual const SceneGraph::PropertyOwner* GetPropertyOwner() const
420 return GetSceneObject();
424 * Notify derived class of installation of a new scene-object property.
425 * This method is called after the message is to sent to install the property
426 * @param [in] newProperty A newly allocated scene-object property. Ownership is obviously not passed.
427 * @param [in] name The name allocated to this custom property.
428 * @param [in] index The index allocated to this custom property.
430 virtual void NotifyScenePropertyInstalled( const SceneGraph::PropertyBase& newProperty, const std::string& name, unsigned int index ) const
436 Object(const Object& rhs);
439 Object& operator=(const Object& rhs);
442 * Enable property notifications in scene graph
444 void EnablePropertyNotifications();
447 * Enable property notifications in scene graph
449 void DisablePropertyNotifications();
452 * Get the value of the property.
453 * @param [in] entry An entry from the property lookup container.
454 * @return The new value of the property.
456 Property::Value GetPropertyValue( const PropertyMetadata* entry ) const;
459 * Set the value of scene graph property.
460 * @param [in] index The index of the property.
461 * @param [in] entry An entry from the property lookup container.
462 * @param [in] value The new value of the property.
464 virtual void SetSceneGraphProperty( Property::Index index, const PropertyMetadata& entry, const Property::Value& value );
468 * Get the event thread services object - used for sending messages to the scene graph
469 * Assert if called from the wrong thread.
470 * This is intentionally inline for performance reasons.
472 * @return The event thread services object
474 inline EventThreadServices& GetEventThreadServices()
476 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
477 return mEventThreadServices;
481 * Get the event thread services object - used for sending messages to the scene graph
482 * Assert if called from the wrong thread
483 * This is intentionally inline for performance reasons.
485 * @return The event thread services object
487 inline const EventThreadServices& GetEventThreadServices() const
489 DALI_ASSERT_DEBUG( EventThreadServices::IsCoreRunning() );
490 return mEventThreadServices;
494 EventThreadServices& mEventThreadServices;
498 typedef OwnerContainer<PropertyMetadata*> PropertyMetadataLookup;
499 mutable PropertyMetadataLookup mCustomProperties; ///< Used for accessing custom Node properties
500 mutable PropertyMetadataLookup mAnimatableProperties; ///< Used for accessing animatable Node properties
501 mutable TypeInfo const * mTypeInfo; ///< The type-info for this object, mutable so it can be lazy initialized from const method if it is required
503 Dali::Vector<Observer*> mObservers;
505 ConstraintContainer* mConstraints; ///< Container of owned -constraints.
507 typedef std::vector< Dali::PropertyNotification > PropertyNotificationContainer;
508 typedef PropertyNotificationContainer::iterator PropertyNotificationContainerIter;
509 typedef PropertyNotificationContainer::const_iterator PropertyNotificationContainerConstIter;
510 PropertyNotificationContainer* mPropertyNotifications; ///< Container of owned property notifications.
513 } // namespace Internal
515 // Helpers for public-api forwarding methods
517 inline Internal::Object& GetImplementation(Dali::Handle& object)
519 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
521 BaseObject& handle = object.GetBaseObject();
523 return static_cast<Internal::Object&>(handle);
526 inline const Internal::Object& GetImplementation(const Dali::Handle& object)
528 DALI_ASSERT_ALWAYS( object && "Object handle is empty" );
530 const BaseObject& handle = object.GetBaseObject();
532 return static_cast<const Internal::Object&>(handle);
537 #endif // __DALI_INTERNAL_OBJECT_H__