CustomActorImpl is an abstract base class for custom control implementations. More...

Inheritance diagram for Dali::CustomActorImpl:

Public Member Functions
CustomActor	Self () const
	Used by derived CustomActorImpl instances, to access the public Actor interface.
virtual void	OnStageConnection (int32_t depth)=0
	Called after the actor has been connected to the stage.
virtual void	OnStageDisconnection ()=0
	Called after the actor has been disconnected from Stage.
virtual void	OnChildAdd (Actor &child)=0
	Called after a child has been added to the owning actor.
virtual void	OnChildRemove (Actor &child)=0
	Called after the owning actor has attempted to remove a child (regardless of whether it succeeded or not).
virtual void	OnPropertySet (Property::Index index, Property::Value propertyValue)
	Called when the owning actor property is set.
virtual void	OnSizeSet (const Vector3 &targetSize)=0
	Called when the owning actor's size is set e.g. using Actor::SetSize().
virtual void	OnSizeAnimation (Animation &animation, const Vector3 &targetSize)=0
	Called when the owning actor's size is animated e.g. using Animation::AnimateTo( Property( actor, Actor::Property::SIZE ), ... ).
virtual bool	OnTouchEvent (const TouchEvent &event) DALI_DEPRECATED_API=0
	Called after a touch-event is received by the owning actor.
virtual bool	OnHoverEvent (const HoverEvent &event)=0
	Called after a hover-event is received by the owning actor.
virtual bool	OnKeyEvent (const KeyEvent &event)=0
	Called after a key-event is received by the actor that has had its focus set.
virtual bool	OnWheelEvent (const WheelEvent &event)=0
	Called after a wheel-event is received by the owning actor.
virtual void	OnRelayout (const Vector2 &size, RelayoutContainer &container)=0
	Called after the size negotiation has been finished for this control.
virtual void	OnSetResizePolicy (ResizePolicy::Type policy, Dimension::Type dimension)=0
	Notification for deriving classes.
virtual Vector3	GetNaturalSize ()=0
	Returns the natural size of the actor.
virtual float	CalculateChildSize (const Dali::Actor &child, Dimension::Type dimension)=0
	Calculates the size for a child.
virtual float	GetHeightForWidth (float width)=0
	This method is called during size negotiation when a height is required for a given width.
virtual float	GetWidthForHeight (float height)=0
	This method is called during size negotiation when a width is required for a given height.
virtual bool	RelayoutDependentOnChildren (Dimension::Type dimension=Dimension::ALL_DIMENSIONS)=0
	Determines if this actor is dependent on its children for relayout.
virtual void	OnCalculateRelayoutSize (Dimension::Type dimension)=0
	Virtual method to notify deriving classes that relayout dependencies have been met and the size for this object is about to be calculated for the given dimension.
virtual void	OnLayoutNegotiated (float size, Dimension::Type dimension)=0
	Virtual method to notify deriving classes that the size for a dimension has just been negotiated.
virtual Extension *	GetExtension ()
	Retrieves the extension for this control.
void	Initialize (Internal::CustomActor &owner)
	Initializes a CustomActor.
Internal::CustomActor *	GetOwner () const
	Gets the owner.
bool	RequiresTouchEvents () const
	Returns whether the OnTouchEvent() callback is required.
bool	RequiresHoverEvents () const
	Returns whether the OnHoverEvent() callback is required.
bool	RequiresWheelEvents () const
	Returns whether the OnWheelEvent() callback is required.
bool	IsRelayoutEnabled () const
	Returns whether relayout is enabled.
Protected Types
enum	ActorFlags
	Enumeration for the constructor flags. More...
Protected Member Functions
virtual	~CustomActorImpl ()
	Forward declare future extension interface.
	CustomActorImpl (ActorFlags flags)
	Creates a CustomActorImpl.
void	RelayoutRequest ()
	Requests a relayout, which means performing a size negotiation on this actor, its parent and children (and potentially whole scene).
float	GetHeightForWidthBase (float width)
	Provides the Actor implementation of GetHeightForWidth.
float	GetWidthForHeightBase (float height)
	Provides the Actor implementation of GetWidthForHeight.
float	CalculateChildSizeBase (const Dali::Actor &child, Dimension::Type dimension)
	Calculates the size for a child using the base actor object.
bool	RelayoutDependentOnChildrenBase (Dimension::Type dimension=Dimension::ALL_DIMENSIONS)
	Determines if this actor is dependent on its children for relayout from the base class.
Static Protected Attributes
static const int32_t	ACTOR_FLAG_COUNT = Log< LAST_ACTOR_FLAG - 1 >::value + 1
	Value for deriving classes to continue on the flag enum.

Detailed Description

CustomActorImpl is an abstract base class for custom control implementations.

This provides a series of pure virtual methods, which are called when actor-specific events occur. And CustomActorImpl is typically owned by a single CustomActor instance; see also CustomActor::CustomActor( CustomActorImpl &implementation ).

Since:: 3.0, DALi version 1.0.0

Member Enumeration Documentation

enum Dali::CustomActorImpl::ActorFlags [protected]

Enumeration for the constructor flags.

Since:: 3.0, DALi version 1.0.0

Enumerator:

ACTOR_BEHAVIOUR_DEFAULT	Use to provide default behaviour (size negotiation is on, event callbacks are not called). Since: 3.0, DALi version 1.2.10
DISABLE_SIZE_NEGOTIATION	True if control does not need size negotiation, i.e. it can be skipped in the algorithm. Since: 3.0, DALi version 1.0.0
REQUIRES_TOUCH_EVENTS	True if the OnTouchEvent() callback is required. Since: 3.0, DALi version 1.0.0
REQUIRES_HOVER_EVENTS	True if the OnHoverEvent() callback is required. Since: 3.0, DALi version 1.0.0
REQUIRES_WHEEL_EVENTS	True if the OnWheelEvent() callback is required. Since: 3.0, DALi version 1.0.0
LAST_ACTOR_FLAG	Special marker for last actor flag. Since: 3.0, DALi version 1.0.0

Constructor & Destructor Documentation

virtual Dali::CustomActorImpl::~CustomActorImpl ( ) [protected, virtual]

Forward declare future extension interface.

Virtual destructor

Since:: 3.0, DALi version 1.0.0

Dali::CustomActorImpl::CustomActorImpl ( ActorFlags flags ) [protected]

Creates a CustomActorImpl.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] flags Bitfield of ActorFlags to define behaviour

Member Function Documentation

virtual float Dali::CustomActorImpl::CalculateChildSize	(	const Dali::Actor &	child,
		Dimension::Type	dimension
	)		`[pure virtual]`

Calculates the size for a child.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	child	The child actor to calculate the size for
[in]	dimension	The dimension to calculate the size for. E.g. width or height

Returns:: Return the calculated size for the given dimension

Implemented in Dali::Toolkit::Internal::Control.

float Dali::CustomActorImpl::CalculateChildSizeBase	(	const Dali::Actor &	child,
		Dimension::Type	dimension
	)		`[protected]`

Calculates the size for a child using the base actor object.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	child	The child actor to calculate the size for
[in]	dimension	The dimension to calculate the size for. E.g. width or height

Returns:: Return the calculated size for the given dimension. If more than one dimension is requested, just return the first one found

virtual Extension* Dali::CustomActorImpl::GetExtension ( ) [virtual]

Retrieves the extension for this control.

Since:: 3.0, DALi version 1.0.0

Returns:: The extension if available, NULL otherwise

virtual float Dali::CustomActorImpl::GetHeightForWidth ( float width ) [pure virtual]

This method is called during size negotiation when a height is required for a given width.

Derived classes should override this if they wish to customize the height returned.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] width Width to use

Returns:: The height based on the width

Implemented in Dali::Toolkit::Internal::Control.

float Dali::CustomActorImpl::GetHeightForWidthBase ( float width ) [protected]

Provides the Actor implementation of GetHeightForWidth.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] width Width to use

Returns:: The height based on the width

virtual Vector3 Dali::CustomActorImpl::GetNaturalSize ( ) [pure virtual]

Returns the natural size of the actor.

Since:: 3.0, DALi version 1.0.0

Returns:: The actor's natural size

Implemented in Dali::Toolkit::Internal::Control.

Internal::CustomActor* Dali::CustomActorImpl::GetOwner ( ) const

Gets the owner.

This method is needed when creating additional handle objects to existing objects. Owner is the Dali::Internal::CustomActor that owns the implementation of the custom actor inside core. Creation of a handle to Dali public API Actor requires this pointer.

Since:: 3.0, DALi version 1.0.0

Returns:: A pointer to the Actor implementation that owns this custom actor implementation

virtual float Dali::CustomActorImpl::GetWidthForHeight ( float height ) [pure virtual]

This method is called during size negotiation when a width is required for a given height.

Derived classes should override this if they wish to customize the width returned.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] height Height to use

Returns:: The width based on the width

Implemented in Dali::Toolkit::Internal::Control.

float Dali::CustomActorImpl::GetWidthForHeightBase ( float height ) [protected]

Provides the Actor implementation of GetWidthForHeight.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] height Height to use

Returns:: The width based on the height

void Dali::CustomActorImpl::Initialize ( Internal::CustomActor & owner )

Initializes a CustomActor.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] owner The owning object

Precondition:: The CustomActorImpl is not already owned.

Note:: Called when ownership of the CustomActorImpl is passed to a CustomActor.

bool Dali::CustomActorImpl::IsRelayoutEnabled ( ) const

Returns whether relayout is enabled.

Since:: 3.0, DALi version 1.0.0

Returns:: Return true if relayout is enabled on the custom actor

Note:: Called when ownership of the CustomActorImpl is passed to a CustomActor.

virtual void Dali::CustomActorImpl::OnCalculateRelayoutSize ( Dimension::Type dimension ) [pure virtual]

Virtual method to notify deriving classes that relayout dependencies have been met and the size for this object is about to be calculated for the given dimension.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] dimension The dimension that is about to be calculated

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnChildAdd ( Actor & child ) [pure virtual]

Called after a child has been added to the owning actor.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] child The child which has been added

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnChildRemove ( Actor & child ) [pure virtual]

Called after the owning actor has attempted to remove a child (regardless of whether it succeeded or not).

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] child The child being removed

Implemented in Dali::Toolkit::Internal::Control.

virtual bool Dali::CustomActorImpl::OnHoverEvent ( const HoverEvent & event ) [pure virtual]

Called after a hover-event is received by the owning actor.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] event The hover event

Returns:: True if the event should be consumed

Note:: CustomActorImpl::REQUIRES_HOVER_EVENTS must be enabled during construction. See CustomActorImpl::CustomActorImpl( ActorFlags flags ).

Implemented in Dali::Toolkit::Internal::Control.

virtual bool Dali::CustomActorImpl::OnKeyEvent ( const KeyEvent & event ) [pure virtual]

Called after a key-event is received by the actor that has had its focus set.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] event The Key Event

Returns:: True if the event should be consumed

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnLayoutNegotiated	(	float	size,
		Dimension::Type	dimension
	)		`[pure virtual]`

Virtual method to notify deriving classes that the size for a dimension has just been negotiated.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	size	The new size for the given dimension
[in]	dimension	The dimension that was just negotiated

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnPropertySet	(	Property::Index	index,
		Property::Value	propertyValue
	)		`[virtual]`

Called when the owning actor property is set.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	index	The Property index that was set
[in]	propertyValue	The value to set

Reimplemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnRelayout	(	const Vector2 &	size,
		RelayoutContainer &	container
	)		`[pure virtual]`

Called after the size negotiation has been finished for this control.

The control is expected to assign this given size to itself/its children.

Should be overridden by derived classes if they need to layout actors differently after certain operations like add or remove actors, resize or after changing specific properties.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	size	The allocated size
[in,out]	container	The control should add actors to this container that it is not able to allocate a size for

Note:: As this function is called from inside the size negotiation algorithm, you cannot call RequestRelayout (the call would just be ignored).

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnSetResizePolicy	(	ResizePolicy::Type	policy,
		Dimension::Type	dimension
	)		`[pure virtual]`

Notification for deriving classes.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	policy	The policy being set
[in]	dimension	The dimension the policy is being set for

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnSizeAnimation	(	Animation &	animation,
		const Vector3 &	targetSize
	)		`[pure virtual]`

Called when the owning actor's size is animated e.g. using Animation::AnimateTo( Property( actor, Actor::Property::SIZE ), ... ).

Since:: 3.0, DALi version 1.0.0

Parameters:

[in]	animation	The object which is animating the owning actor
[in]	targetSize	The target size. Note that this target size may not match the size returned via Actor::GetTargetSize

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnSizeSet ( const Vector3 & targetSize ) [pure virtual]

Called when the owning actor's size is set e.g. using Actor::SetSize().

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] targetSize The target size. Note that this target size may not match the size returned via Actor::GetTargetSize

Implemented in Dali::Toolkit::Internal::Control.

virtual void Dali::CustomActorImpl::OnStageConnection ( int32_t depth ) [pure virtual]

Called after the actor has been connected to the stage.

When an actor is connected, it will be directly or indirectly parented to the root Actor.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] depth The depth in the hierarchy for the actor

Note:: The root Actor is provided automatically by Dali::Stage, and is always considered to be connected. When the parent of a set of actors is connected to the stage, then all of the children will received this callback. For the following actor tree, the callback order will be A, B, D, E, C, and finally F.

       A (parent)
      / \
     B   C
    / \   \
   D   E   F

Parameters:

[in] depth The depth in the hierarchy for the actor

virtual void Dali::CustomActorImpl::OnStageDisconnection ( ) [pure virtual]

Called after the actor has been disconnected from Stage.

If an actor is disconnected, it either has no parent or is parented to a disconnected actor.

Since:: 3.0, DALi version 1.0.0

Note:: When the parent of a set of actors is disconnected to the stage, then all of the children will received this callback, starting with the leaf actors. For the following actor tree, the callback order will be D, E, B, F, C, and finally A.

       A (parent)
      / \
     B   C
    / \   \
   D   E   F

Implemented in Dali::Toolkit::Internal::Control.

virtual bool Dali::CustomActorImpl::OnTouchEvent ( const TouchEvent & event ) [pure virtual]

Called after a touch-event is received by the owning actor.

Deprecated:: Deprecated since 3.0, DALi version 1.1.37 Connect to TouchSignal() instead.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] event The touch event

Returns:: True if the event should be consumed

Note:: CustomActorImpl::REQUIRES_TOUCH_EVENTS must be enabled during construction. See CustomActorImpl::CustomActorImpl( ActorFlags flags ).

Implemented in Dali::Toolkit::Internal::Control.

virtual bool Dali::CustomActorImpl::OnWheelEvent ( const WheelEvent & event ) [pure virtual]

Called after a wheel-event is received by the owning actor.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] event The wheel event

Returns:: True if the event should be consumed

Note:: CustomActorImpl::REQUIRES_WHEEL_EVENTS must be enabled during construction. See CustomActorImpl::CustomActorImpl( ActorFlags flags ).

Implemented in Dali::Toolkit::Internal::Control.

virtual bool Dali::CustomActorImpl::RelayoutDependentOnChildren ( Dimension::Type dimension = Dimension::ALL_DIMENSIONS ) [pure virtual]

Determines if this actor is dependent on its children for relayout.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] dimension The dimension(s) to check for

Returns:: Return if the actor is dependent on it's children

Implemented in Dali::Toolkit::Internal::Control.

bool Dali::CustomActorImpl::RelayoutDependentOnChildrenBase ( Dimension::Type dimension = Dimension::ALL_DIMENSIONS ) [protected]

Determines if this actor is dependent on its children for relayout from the base class.

Since:: 3.0, DALi version 1.0.0

Parameters:

[in] dimension The dimension(s) to check for

Returns:: Return if the actor is dependent on it's children

void Dali::CustomActorImpl::RelayoutRequest ( ) [protected]

Requests a relayout, which means performing a size negotiation on this actor, its parent and children (and potentially whole scene).

This method can also be called from a derived class every time it needs a different size. At the end of event processing, the relayout process starts and all controls which requested Relayout will have their sizes (re)negotiated.

Since:: 3.0, DALi version 1.0.0

Note:: RelayoutRequest() can be called multiple times; the size negotiation is still only performed once, i.e. there is no need to keep track of this in the calling side.

bool Dali::CustomActorImpl::RequiresHoverEvents ( ) const

Returns whether the OnHoverEvent() callback is required.

Since:: 3.0, DALi version 1.0.0

Returns:: True if the OnHoverEvent() callback is required

Note:: Called when ownership of the CustomActorImpl is passed to a CustomActor.

bool Dali::CustomActorImpl::RequiresTouchEvents ( ) const

Returns whether the OnTouchEvent() callback is required.

Since:: 3.0, DALi version 1.0.0

Returns:: True if the OnTouchEvent() callback is required

Note:: Called when ownership of the CustomActorImpl is passed to a CustomActor.

bool Dali::CustomActorImpl::RequiresWheelEvents ( ) const

Returns whether the OnWheelEvent() callback is required.

Since:: 3.0, DALi version 1.0.0

Returns:: True if the OnWheelEvent() callback is required

Note:: Called when ownership of the CustomActorImpl is passed to a CustomActor.

CustomActor Dali::CustomActorImpl::Self ( ) const

Used by derived CustomActorImpl instances, to access the public Actor interface.

Since:: 3.0, DALi version 1.0.0

Returns:: A pointer to self, or an uninitialized pointer if the CustomActorImpl is not owned.

Public Member Functions

Protected Types

Protected Member Functions

Static Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation