1 #ifndef DALI_INTERNAL_ACTOR_H
2 #define DALI_INTERNAL_ACTOR_H
5 * Copyright (c) 2021 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.
25 #include <dali/devel-api/actors/actor-devel.h>
26 #include <dali/devel-api/rendering/renderer-devel.h>
27 #include <dali/internal/common/const-string.h>
28 #include <dali/internal/common/internal-constants.h>
29 #include <dali/internal/common/memory-pool-object-allocator.h>
30 #include <dali/internal/event/actors/actor-declarations.h>
31 #include <dali/internal/event/actors/actor-parent-impl.h>
32 #include <dali/internal/event/actors/actor-parent.h>
33 #include <dali/internal/event/common/object-impl.h>
34 #include <dali/internal/event/common/stage-def.h>
35 #include <dali/internal/update/nodes/node-declarations.h>
36 #include <dali/public-api/actors/actor.h>
37 #include <dali/public-api/common/dali-common.h>
38 #include <dali/public-api/common/vector-wrapper.h>
39 #include <dali/public-api/events/gesture.h>
40 #include <dali/public-api/math/viewport.h>
41 #include <dali/public-api/object/ref-object.h>
42 #include <dali/public-api/size-negotiation/relayout-container.h>
54 class ActorGestureData;
60 using RendererPtr = IntrusivePtr<Renderer>;
61 using RendererContainer = std::vector<RendererPtr>;
62 using RendererIter = RendererContainer::iterator;
64 class ActorDepthTreeNode;
65 using DepthNodeMemoryPool = Dali::Internal::MemoryPoolObjectAllocator<ActorDepthTreeNode>;
68 * Actor is the primary object with which Dali applications interact.
69 * UI controls can be built by combining multiple actors.
70 * Multi-Touch events are received through signals emitted by the actor tree.
72 * An Actor is a proxy for a Node in the scene graph.
73 * When an Actor is added to the Stage, it creates a node and connects it to the scene graph.
74 * The scene-graph can be updated in a separate thread, so the connection is done using an asynchronous message.
75 * When a tree of Actors is detached from the Stage, a message is sent to destroy the associated nodes.
77 class Actor : public Object, public ActorParent
81 * @brief Struct to hold an actor and a dimension
83 struct ActorDimensionPair
88 * @param[in] newActor The actor to assign
89 * @param[in] newDimension The dimension to assign
91 ActorDimensionPair(Actor* newActor, Dimension::Type newDimension)
93 dimension(newDimension)
98 * @brief Equality operator
100 * @param[in] lhs The left hand side argument
101 * @param[in] rhs The right hand side argument
103 bool operator==(const ActorDimensionPair& rhs)
105 return (actor == rhs.actor) && (dimension == rhs.dimension);
108 Actor* actor; ///< The actor to hold
109 Dimension::Type dimension; ///< The dimension to hold
112 using ActorDimensionStack = std::vector<ActorDimensionPair>;
116 * Create a new actor.
117 * @return A smart-pointer to the newly allocated Actor.
119 static ActorPtr New();
122 * Helper to create node for derived classes who don't have their own node type
123 * @return pointer to newly created unique node
125 static const SceneGraph::Node* CreateNode();
128 * Retrieve the name of the actor.
131 std::string_view GetName() const
133 return mName.GetStringView();
137 * Set the name of the actor.
138 * @param[in] name The new name.
140 void SetName(std::string_view name);
143 * @copydoc Dali::Actor::GetId
145 uint32_t GetId() const;
150 * Query whether an actor is the root actor, which is owned by the Stage.
151 * @return True if the actor is a root actor.
159 * Query whether the actor is connected to the Scene.
167 * Query whether the actor has any renderers.
168 * @return True if the actor is renderable.
170 bool IsRenderable() const
172 // inlined as this is called a lot in hit testing
173 return mRenderers && !mRenderers->empty();
177 * Query whether the actor is of class Dali::Layer
178 * @return True if the actor is a layer.
182 // inlined as this is called a lot in hit testing
187 * Gets the layer in which the actor is present
188 * @return The layer, which will be uninitialized if the actor is off-stage.
190 Dali::Layer GetLayer();
193 * @copydoc Dali::Internal::ActorParent::Add()
195 void Add(Actor& child) override;
198 * @copydoc Dali::Internal::ActorParent::Remove()
200 void Remove(Actor& child) override;
203 * @copydoc Dali::DevelActor::SwitchParent()
205 void SwitchParent(Actor& newParent);
208 * @copydoc Dali::Internal::ActorParent::AddWithoutNotify()
210 void AddWithoutNotify(Actor& child);
213 * @copydoc Dali::Internal::ActorParent::RemoveWithoutNotify()
215 bool RemoveWithoutNotify(Actor& child);
218 * @copydoc Dali::Actor::Unparent
223 * @copydoc Dali::Internal::ActorParent::GetChildCount()
225 uint32_t GetChildCount() const override;
228 * @copydoc Dali::Internal::ActorParent::GetChildAt
230 ActorPtr GetChildAt(uint32_t index) const override;
233 * Retrieve a reference to Actor's children.
234 * @note Not for public use.
235 * @return A reference to the container of children.
236 * @note The internal container is lazily initialized so ensure you check the child count before using the value returned by this method.
238 ActorContainer& GetChildrenInternal();
241 * @copydoc Dali::Internal::ActorParent::FindChildByName
243 ActorPtr FindChildByName(ConstString actorName) override;
246 * @copydoc Dali::Internal::ActorParent::FindChildById
248 ActorPtr FindChildById(const uint32_t id) override;
251 * @copydoc Dali::Internal::ActorParent::UnparentChildren
253 void UnparentChildren() override;
256 * Retrieve the parent of an Actor.
257 * @return The parent actor, or NULL if the Actor does not have a parent.
259 Actor* GetParent() const
261 return static_cast<Actor*>(mParent);
265 * Calculates screen position and size.
267 * @return pair of two values, position of top-left corner on screen and size respectively.
269 Rect<> CalculateScreenExtents() const;
272 * @copydoc DevelActor::SetNeedGesturePropagation.
274 void SetNeedGesturePropagation(bool propagation);
277 * Retrieve need gesture propagation value
278 * @return The actor's need gesture propagation value.
280 bool NeedGesturePropagation();
283 * Sets the size of an actor.
284 * This does not interfere with the actors scale factor.
285 * @param [in] width The new width.
286 * @param [in] height The new height.
288 void SetSize(float width, float height);
291 * Sets the size of an actor.
292 * This does not interfere with the actors scale factor.
293 * @param [in] width The size of the actor along the x-axis.
294 * @param [in] height The size of the actor along the y-axis.
295 * @param [in] depth The size of the actor along the z-axis.
297 void SetSize(float width, float height, float depth);
300 * Sets the size of an actor.
301 * This does not interfere with the actors scale factor.
302 * @param [in] size The new size.
304 void SetSize(const Vector2& size);
307 * Sets the update size for an actor.
309 * @param[in] size The size to set.
311 void SetSizeInternal(const Vector2& size);
314 * Sets the size of an actor.
315 * This does not interfere with the actors scale factor.
316 * @param [in] size The new size.
318 void SetSize(const Vector3& size);
321 * Sets the update size for an actor.
323 * @param[in] size The size to set.
325 void SetSizeInternal(const Vector3& size);
328 * Set the width component of the Actor's size.
329 * @param [in] width The new width component.
331 void SetWidth(float width);
334 * Set the height component of the Actor's size.
335 * @param [in] height The new height component.
337 void SetHeight(float height);
340 * Set the depth component of the Actor's size.
341 * @param [in] depth The new depth component.
343 void SetDepth(float depth);
346 * Retrieve the Actor's size from event side.
347 * This size will be the size set or if animating then the target size.
348 * @return The Actor's size.
350 Vector3 GetTargetSize() const;
353 * Retrieve the Actor's size from update side.
354 * This size will be the size set or animating but will be a frame behind.
355 * @return The Actor's size.
357 const Vector3& GetCurrentSize() const;
360 * Return the natural size of the actor
362 * @return The actor's natural size
364 virtual Vector3 GetNaturalSize() const;
367 * Set the origin of an actor, within its parent's area.
368 * This is expressed in 2D unit coordinates, such that (0.0, 0.0, 0.5) is the top-left corner of the parent,
369 * and (1.0, 1.0, 0.5) is the bottom-right corner.
370 * The default parent-origin is top-left (0.0, 0.0, 0.5).
371 * An actor position is the distance between this origin, and the actors anchor-point.
372 * @param [in] origin The new parent-origin.
374 void SetParentOrigin(const Vector3& origin);
377 * Retrieve the parent-origin of an actor.
378 * @return The parent-origin.
380 const Vector3& GetCurrentParentOrigin() const;
383 * Set the anchor-point of an actor. This is expressed in 2D unit coordinates, such that
384 * (0.0, 0.0, 0.5) is the top-left corner of the actor, and (1.0, 1.0, 0.5) is the bottom-right corner.
385 * The default anchor point is top-left (0.0, 0.0, 0.5).
386 * An actor position is the distance between its parent-origin, and this anchor-point.
387 * An actor's rotation is centered around its anchor-point.
388 * @param [in] anchorPoint The new anchor-point.
390 void SetAnchorPoint(const Vector3& anchorPoint);
393 * Retrieve the anchor-point of an actor.
394 * @return The anchor-point.
396 const Vector3& GetCurrentAnchorPoint() const;
399 * Sets the position of the Actor.
400 * The coordinates are relative to the Actor's parent.
401 * The Actor's z position will be set to 0.0f.
402 * @param [in] x The new x position
403 * @param [in] y The new y position
405 void SetPosition(float x, float y);
408 * Sets the position of the Actor.
409 * The coordinates are relative to the Actor's parent.
410 * @param [in] x The new x position
411 * @param [in] y The new y position
412 * @param [in] z The new z position
414 void SetPosition(float x, float y, float z);
417 * Sets the position of the Actor.
418 * The coordinates are relative to the Actor's parent.
419 * @param [in] position The new position.
421 void SetPosition(const Vector3& position);
424 * Set the position of an actor along the X-axis.
425 * @param [in] x The new x position
430 * Set the position of an actor along the Y-axis.
431 * @param [in] y The new y position.
436 * Set the position of an actor along the Z-axis.
437 * @param [in] z The new z position
442 * Translate an actor relative to its existing position.
443 * @param[in] distance The actor will move by this distance.
445 void TranslateBy(const Vector3& distance);
448 * Retrieve the position of the Actor.
449 * The coordinates are relative to the Actor's parent.
450 * @return the Actor's position.
452 const Vector3& GetCurrentPosition() const;
455 * Retrieve the target position of the Actor.
456 * The coordinates are relative to the Actor's parent.
457 * @return the Actor's position.
459 const Vector3& GetTargetPosition() const
461 return mTargetPosition;
465 * @copydoc Dali::Actor::GetCurrentWorldPosition()
467 const Vector3& GetCurrentWorldPosition() const;
470 * @copydoc Dali::Actor::SetInheritPosition()
472 void SetInheritPosition(bool inherit);
475 * @copydoc Dali::Actor::IsPositionInherited()
477 bool IsPositionInherited() const
479 return mInheritPosition;
483 * Sets the orientation of the Actor.
484 * @param [in] angleRadians The new orientation angle in radians.
485 * @param [in] axis The new axis of orientation.
487 void SetOrientation(const Radian& angleRadians, const Vector3& axis);
490 * Sets the orientation of the Actor.
491 * @param [in] orientation The new orientation.
493 void SetOrientation(const Quaternion& orientation);
496 * Rotate an actor around its existing rotation axis.
497 * @param[in] angleRadians The angle to the rotation to combine with the existing rotation.
498 * @param[in] axis The axis of the rotation to combine with the existing rotation.
500 void RotateBy(const Radian& angleRadians, const Vector3& axis);
503 * Apply a relative rotation to an actor.
504 * @param[in] relativeRotation The rotation to combine with the actors existing rotation.
506 void RotateBy(const Quaternion& relativeRotation);
509 * Retreive the Actor's orientation.
510 * @return the orientation.
512 const Quaternion& GetCurrentOrientation() const;
515 * Set whether a child actor inherits it's parent's orientation. Default is to inherit.
516 * Switching this off means that using SetOrientation() sets the actor's world orientation.
517 * @param[in] inherit - true if the actor should inherit orientation, false otherwise.
519 void SetInheritOrientation(bool inherit);
522 * Returns whether the actor inherit's it's parent's orientation.
523 * @return true if the actor inherit's it's parent orientation, false if it uses world orientation.
525 bool IsOrientationInherited() const
527 return mInheritOrientation;
531 * Sets the factor of the parents size used for the child actor.
532 * Note: Only used if ResizePolicy is ResizePolicy::SIZE_RELATIVE_TO_PARENT or ResizePolicy::SIZE_FIXED_OFFSET_FROM_PARENT.
533 * @param[in] factor The vector to multiply the parents size by to get the childs size.
535 void SetSizeModeFactor(const Vector3& factor);
538 * Gets the factor of the parents size used for the child actor.
539 * Note: Only used if ResizePolicy is ResizePolicy::SIZE_RELATIVE_TO_PARENT or ResizePolicy::SIZE_FIXED_OFFSET_FROM_PARENT.
540 * @return The vector being used to multiply the parents size by to get the childs size.
542 const Vector3& GetSizeModeFactor() const;
545 * @copydoc Dali::Actor::GetCurrentWorldOrientation()
547 const Quaternion& GetCurrentWorldOrientation() const;
550 * Sets a scale factor applied to an actor.
551 * @param [in] scale The scale factor applied on all axes.
553 void SetScale(float scale);
556 * Sets a scale factor applied to an actor.
557 * @param [in] scaleX The scale factor applied along the x-axis.
558 * @param [in] scaleY The scale factor applied along the y-axis.
559 * @param [in] scaleZ The scale factor applied along the z-axis.
561 void SetScale(float scaleX, float scaleY, float scaleZ);
564 * Sets a scale factor applied to an actor.
565 * @param [in] scale A vector representing the scale factor for each axis.
567 void SetScale(const Vector3& scale);
570 * Set the x component of the scale factor.
571 * @param [in] x The new x value.
573 void SetScaleX(float x);
576 * Set the y component of the scale factor.
577 * @param [in] y The new y value.
579 void SetScaleY(float y);
582 * Set the z component of the scale factor.
583 * @param [in] z The new z value.
585 void SetScaleZ(float z);
588 * Apply a relative scale to an actor.
589 * @param[in] relativeScale The scale to combine with the actors existing scale.
591 void ScaleBy(const Vector3& relativeScale);
594 * Retrieve the scale factor applied to an actor.
595 * @return A vector representing the scale factor for each axis.
597 const Vector3& GetCurrentScale() const;
600 * @copydoc Dali::Actor::GetCurrentWorldScale()
602 const Vector3& GetCurrentWorldScale() const;
605 * @copydoc Dali::Actor::SetInheritScale()
607 void SetInheritScale(bool inherit);
610 * @copydoc Dali::Actor::IsScaleInherited()
612 bool IsScaleInherited() const
614 return mInheritScale;
618 * @copydoc Dali::Actor::GetCurrentWorldMatrix()
620 Matrix GetCurrentWorldMatrix() const;
625 * Sets the visibility flag of an actor.
626 * @param[in] visible The new visibility flag.
628 void SetVisible(bool visible);
631 * Retrieve the visibility flag of an actor.
632 * @return The visibility flag.
634 bool IsVisible() const;
637 * Sets the opacity of an actor.
638 * @param [in] opacity The new opacity.
640 void SetOpacity(float opacity);
643 * Retrieve the actor's opacity.
644 * @return The actor's opacity.
646 float GetCurrentOpacity() const;
649 * Retrieve the actor's clipping mode.
650 * @return The actor's clipping mode (cached)
652 ClippingMode::Type GetClippingMode() const
654 return mClippingMode;
658 * Sets whether an actor should emit touch or hover signals; see SignalTouch() and SignalHover().
659 * An actor is sensitive by default, which means that as soon as an application connects to the SignalTouch(),
660 * the touch event signal will be emitted, and as soon as an application connects to the SignalHover(), the
661 * hover event signal will be emitted.
663 * If the application wishes to temporarily disable the touch or hover event signal emission, then they can do so by calling:
665 * actor.SetSensitive(false);
668 * Then, to re-enable the touch or hover event signal emission, the application should call:
670 * actor.SetSensitive(true);
673 * @see SignalTouch() and SignalHover().
674 * @note If an actor's sensitivity is set to false, then it's children will not emit a touch or hover event signal either.
675 * @param[in] sensitive true to enable emission of the touch or hover event signals, false otherwise.
677 void SetSensitive(bool sensitive)
679 mSensitive = sensitive;
683 * Query whether an actor emits touch or hover event signals.
684 * @see SetSensitive(bool)
685 * @return true, if emission of touch or hover event signals is enabled, false otherwise.
687 bool IsSensitive() const
693 * @copydoc Dali::Actor::SetDrawMode
695 void SetDrawMode(DrawMode::Type drawMode);
698 * @copydoc Dali::Actor::GetDrawMode
700 DrawMode::Type GetDrawMode() const
706 * @copydoc Dali::Actor::IsOverlay
708 bool IsOverlay() const
710 return (DrawMode::OVERLAY_2D == mDrawMode);
714 * Sets the actor's color. The final color of actor depends on its color mode.
715 * This final color is applied to the drawable elements of an actor.
716 * @param [in] color The new color.
718 void SetColor(const Vector4& color);
721 * Set the red component of the color.
722 * @param [in] red The new red component.
724 void SetColorRed(float red);
727 * Set the green component of the color.
728 * @param [in] green The new green component.
730 void SetColorGreen(float green);
733 * Set the blue component of the scale factor.
734 * @param [in] blue The new blue value.
736 void SetColorBlue(float blue);
739 * Retrieve the actor's color.
742 const Vector4& GetCurrentColor() const;
745 * Sets the actor's color mode.
746 * Color mode specifies whether Actor uses its own color or inherits its parent color
747 * @param [in] colorMode to use.
749 void SetColorMode(ColorMode colorMode);
752 * Returns the actor's color mode.
753 * @return currently used colorMode.
755 ColorMode GetColorMode() const
761 * @copydoc Dali::Actor::GetCurrentWorldColor()
763 const Vector4& GetCurrentWorldColor() const;
766 * @copydoc Dali::Actor::GetHierarchyDepth()
768 inline int32_t GetHierarchyDepth() const
779 * Get the actor's sorting depth
781 * @return The depth used for hit-testing and renderer sorting
783 uint32_t GetSortingDepth()
789 // Size negotiation virtual functions
792 * @brief Called after the size negotiation has been finished for this control.
794 * The control is expected to assign this given size to itself/its children.
796 * Should be overridden by derived classes if they need to layout
797 * actors differently after certain operations like add or remove
798 * actors, resize or after changing specific properties.
800 * Note! As this function is called from inside the size negotiation algorithm, you cannot
801 * call RequestRelayout (the call would just be ignored)
803 * @param[in] size The allocated size.
804 * @param[in,out] container The control should add actors to this container that it is not able
805 * to allocate a size for.
807 virtual void OnRelayout(const Vector2& size, RelayoutContainer& container)
812 * @brief Notification for deriving classes when the resize policy is set
814 * @param[in] policy The policy being set
815 * @param[in] dimension The dimension the policy is being set for
817 virtual void OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension)
822 * @brief Virtual method to notify deriving classes that relayout dependencies have been
823 * met and the size for this object is about to be calculated for the given dimension
825 * @param dimension The dimension that is about to be calculated
827 virtual void OnCalculateRelayoutSize(Dimension::Type dimension)
832 * @brief Virtual method to notify deriving classes that the size for a dimension
833 * has just been negotiated
835 * @param[in] size The new size for the given dimension
836 * @param[in] dimension The dimension that was just negotiated
838 virtual void OnLayoutNegotiated(float size, Dimension::Type dimension)
843 * @brief Determine if this actor is dependent on it's children for relayout
845 * @param dimension The dimension(s) to check for
846 * @return Return if the actor is dependent on it's children
848 virtual bool RelayoutDependentOnChildren(Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
851 * @brief Determine if this actor is dependent on it's children for relayout.
853 * Called from deriving classes
855 * @param dimension The dimension(s) to check for
856 * @return Return if the actor is dependent on it's children
858 virtual bool RelayoutDependentOnChildrenBase(Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
861 * @brief Calculate the size for a child
863 * @param[in] child The child actor to calculate the size for
864 * @param[in] dimension The dimension to calculate the size for. E.g. width or height.
865 * @return Return the calculated size for the given dimension
867 virtual float CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension);
870 * @brief This method is called during size negotiation when a height is required for a given width.
872 * Derived classes should override this if they wish to customize the height returned.
874 * @param width to use.
875 * @return the height based on the width.
877 virtual float GetHeightForWidth(float width);
880 * @brief This method is called during size negotiation when a width is required for a given height.
882 * Derived classes should override this if they wish to customize the width returned.
884 * @param height to use.
885 * @return the width based on the width.
887 virtual float GetWidthForHeight(float height);
893 * @brief Called by the RelayoutController to negotiate the size of an actor.
895 * The size allocated by the the algorithm is passed in which the
896 * actor must adhere to. A container is passed in as well which
897 * the actor should populate with actors it has not / or does not
898 * need to handle in its size negotiation.
900 * @param[in] size The allocated size.
901 * @param[in,out] container The container that holds actors that are fed back into the
902 * RelayoutController algorithm.
904 void NegotiateSize(const Vector2& size, RelayoutContainer& container);
907 * @brief Set whether size negotiation should use the assigned size of the actor
908 * during relayout for the given dimension(s)
910 * @param[in] use Whether the assigned size of the actor should be used
911 * @param[in] dimension The dimension(s) to set. Can be a bitfield of multiple dimensions
913 void SetUseAssignedSize(bool use, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
916 * @brief Returns whether size negotiation should use the assigned size of the actor
917 * during relayout for a single dimension
919 * @param[in] dimension The dimension to get
920 * @return Return whether the assigned size of the actor should be used. If more than one dimension is requested, just return the first one found
922 bool GetUseAssignedSize(Dimension::Type dimension) const;
925 * @copydoc Dali::Actor::SetResizePolicy()
927 void SetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
930 * @copydoc Dali::Actor::GetResizePolicy()
932 ResizePolicy::Type GetResizePolicy(Dimension::Type dimension) const;
935 * @copydoc Dali::Actor::SetSizeScalePolicy()
937 void SetSizeScalePolicy(SizeScalePolicy::Type policy);
940 * @copydoc Dali::Actor::GetSizeScalePolicy()
942 SizeScalePolicy::Type GetSizeScalePolicy() const;
945 * @copydoc Dali::Actor::SetDimensionDependency()
947 void SetDimensionDependency(Dimension::Type dimension, Dimension::Type dependency);
950 * @copydoc Dali::Actor::GetDimensionDependency()
952 Dimension::Type GetDimensionDependency(Dimension::Type dimension) const;
955 * @brief Set the size negotiation relayout enabled on this actor
957 * @param[in] relayoutEnabled Boolean to enable or disable relayout
959 void SetRelayoutEnabled(bool relayoutEnabled);
962 * @brief Return if relayout is enabled
964 * @return Return if relayout is enabled or not for this actor
966 bool IsRelayoutEnabled() const;
969 * @brief Mark an actor as having it's layout dirty
971 * @param dirty Whether to mark actor as dirty or not
972 * @param dimension The dimension(s) to mark as dirty
974 void SetLayoutDirty(bool dirty, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
977 * @brief Return if any of an actor's dimensions are marked as dirty
979 * @param dimension The dimension(s) to check
980 * @return Return if any of the requested dimensions are dirty
982 bool IsLayoutDirty(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) const;
985 * @brief Returns if relayout is enabled and the actor is not dirty
987 * @return Return if it is possible to relayout the actor
989 bool RelayoutPossible(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) const;
992 * @brief Returns if relayout is enabled and the actor is dirty
994 * @return Return if it is required to relayout the actor
996 bool RelayoutRequired(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) const;
999 * @brief Request a relayout, which means performing a size negotiation on this actor, its parent and children (and potentially whole scene)
1001 * This method is automatically called from OnSceneConnection(), OnChildAdd(),
1002 * OnChildRemove(), SetSizePolicy(), SetMinimumSize() and SetMaximumSize().
1004 * This method can also be called from a derived class every time it needs a different size.
1005 * At the end of event processing, the relayout process starts and
1006 * all controls which requested Relayout will have their sizes (re)negotiated.
1008 * @note RelayoutRequest() can be called multiple times; the size negotiation is still
1009 * only performed once, i.e. there is no need to keep track of this in the calling side.
1011 void RelayoutRequest(Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1014 * @brief Determine if this actor is dependent on it's parent for relayout
1016 * @param dimension The dimension(s) to check for
1017 * @return Return if the actor is dependent on it's parent
1019 bool RelayoutDependentOnParent(Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1022 * @brief Determine if this actor has another dimension depedent on the specified one
1024 * @param dimension The dimension to check for
1025 * @param dependentDimension The dimension to check for dependency with
1026 * @return Return if the actor is dependent on this dimension
1028 bool RelayoutDependentOnDimension(Dimension::Type dimension, Dimension::Type dependentDimension);
1031 * @brief Calculate the size of a dimension
1033 * @param[in] dimension The dimension to calculate the size for
1034 * @param[in] maximumSize The upper bounds on the size
1035 * @return Return the calculated size for the dimension
1037 float CalculateSize(Dimension::Type dimension, const Vector2& maximumSize);
1040 * Negotiate a dimension based on the size of the parent
1042 * @param[in] dimension The dimension to negotiate on
1043 * @return Return the negotiated size
1045 float NegotiateFromParent(Dimension::Type dimension);
1048 * Negotiate a dimension based on the size of the parent. Fitting inside.
1050 * @param[in] dimension The dimension to negotiate on
1051 * @return Return the negotiated size
1053 float NegotiateFromParentFit(Dimension::Type dimension);
1056 * Negotiate a dimension based on the size of the parent. Flooding the whole space.
1058 * @param[in] dimension The dimension to negotiate on
1059 * @return Return the negotiated size
1061 float NegotiateFromParentFlood(Dimension::Type dimension);
1064 * @brief Negotiate a dimension based on the size of the children
1066 * @param[in] dimension The dimension to negotiate on
1067 * @return Return the negotiated size
1069 float NegotiateFromChildren(Dimension::Type dimension);
1072 * Set the negotiated dimension value for the given dimension(s)
1074 * @param negotiatedDimension The value to set
1075 * @param dimension The dimension(s) to set the value for
1077 void SetNegotiatedDimension(float negotiatedDimension, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1080 * Return the value of negotiated dimension for the given dimension
1082 * @param dimension The dimension to retrieve
1083 * @return Return the value of the negotiated dimension
1085 float GetNegotiatedDimension(Dimension::Type dimension) const;
1088 * @brief Set the padding for a dimension
1090 * @param[in] padding Padding for the dimension. X = start (e.g. left, bottom), y = end (e.g. right, top)
1091 * @param[in] dimension The dimension to set
1093 void SetPadding(const Vector2& padding, Dimension::Type dimension);
1096 * Return the value of padding for the given dimension
1098 * @param dimension The dimension to retrieve
1099 * @return Return the value of padding for the dimension
1101 Vector2 GetPadding(Dimension::Type dimension) const;
1104 * Return the actor size for a given dimension
1106 * @param[in] dimension The dimension to retrieve the size for
1107 * @return Return the size for the given dimension
1109 float GetSize(Dimension::Type dimension) const;
1112 * Return the natural size of the actor for a given dimension
1114 * @param[in] dimension The dimension to retrieve the size for
1115 * @return Return the natural size for the given dimension
1117 float GetNaturalSize(Dimension::Type dimension) const;
1120 * @brief Return the amount of size allocated for relayout
1122 * May include padding
1124 * @param[in] dimension The dimension to retrieve
1125 * @return Return the size
1127 float GetRelayoutSize(Dimension::Type dimension) const;
1130 * @brief If the size has been negotiated return that else return normal size
1132 * @param[in] dimension The dimension to retrieve
1133 * @return Return the size
1135 float GetLatestSize(Dimension::Type dimension) const;
1138 * Apply the negotiated size to the actor
1140 * @param[in] container The container to fill with actors that require further relayout
1142 void SetNegotiatedSize(RelayoutContainer& container);
1145 * @brief Flag the actor as having it's layout dimension negotiated.
1147 * @param[in] negotiated The status of the flag to set.
1148 * @param[in] dimension The dimension to set the flag for
1150 void SetLayoutNegotiated(bool negotiated, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1153 * @brief Test whether the layout dimension for this actor has been negotiated or not.
1155 * @param[in] dimension The dimension to determine the value of the flag for
1156 * @return Return if the layout dimension is negotiated or not.
1158 bool IsLayoutNegotiated(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) const;
1161 * @brief provides the Actor implementation of GetHeightForWidth
1162 * @param width to use.
1163 * @return the height based on the width.
1165 float GetHeightForWidthBase(float width);
1168 * @brief provides the Actor implementation of GetWidthForHeight
1169 * @param height to use.
1170 * @return the width based on the height.
1172 float GetWidthForHeightBase(float height);
1175 * @brief Calculate the size for a child
1177 * @param[in] child The child actor to calculate the size for
1178 * @param[in] dimension The dimension to calculate the size for. E.g. width or height.
1179 * @return Return the calculated size for the given dimension
1181 float CalculateChildSizeBase(const Dali::Actor& child, Dimension::Type dimension);
1184 * @brief Set the preferred size for size negotiation
1186 * @param[in] size The preferred size to set
1188 void SetPreferredSize(const Vector2& size);
1191 * @brief Return the preferred size used for size negotiation
1193 * @return Return the preferred size
1195 Vector2 GetPreferredSize() const;
1198 * @copydoc Dali::Actor::SetMinimumSize
1200 void SetMinimumSize(float size, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1203 * @copydoc Dali::Actor::GetMinimumSize
1205 float GetMinimumSize(Dimension::Type dimension) const;
1208 * @copydoc Dali::Actor::SetMaximumSize
1210 void SetMaximumSize(float size, Dimension::Type dimension = Dimension::ALL_DIMENSIONS);
1213 * @copydoc Dali::Actor::GetMaximumSize
1215 float GetMaximumSize(Dimension::Type dimension) const;
1218 * @copydoc Dali::Actor::AddRenderer()
1220 uint32_t AddRenderer(Renderer& renderer);
1223 * @copydoc Dali::Actor::GetRendererCount()
1225 uint32_t GetRendererCount() const;
1228 * @copydoc Dali::Actor::GetRendererAt()
1230 RendererPtr GetRendererAt(uint32_t index);
1233 * @copydoc Dali::Actor::RemoveRenderer()
1235 void RemoveRenderer(Renderer& renderer);
1238 * @copydoc Dali::Actor::RemoveRenderer()
1240 void RemoveRenderer(uint32_t index);
1243 * @brief Set BlendEquation at each renderer that added on this Actor.
1245 void SetBlendEquation(DevelBlendEquation::Type blendEquation);
1248 * @brief Get Blend Equation that applied to this Actor
1250 DevelBlendEquation::Type GetBlendEquation() const;
1253 * @brief Set this Actor is transparent or not without any affection on the child Actors.
1255 virtual void SetTransparent(bool transparent);
1258 * @brief Get this Actor is transparent or not.
1260 virtual bool GetTransparent() const;
1264 * Converts screen coordinates into the actor's coordinate system.
1265 * @note The actor coordinates are relative to the top-left (0.0, 0.0, 0.5)
1266 * @param[out] localX On return, the X-coordinate relative to the actor.
1267 * @param[out] localY On return, the Y-coordinate relative to the actor.
1268 * @param[in] screenX The screen X-coordinate.
1269 * @param[in] screenY The screen Y-coordinate.
1270 * @return True if the conversion succeeded.
1272 bool ScreenToLocal(float& localX, float& localY, float screenX, float screenY) const;
1275 * Converts screen coordinates into the actor's coordinate system.
1276 * @note The actor coordinates are relative to the top-left (0.0, 0.0, 0.5)
1277 * @param[in] renderTask The render-task used to display the actor.
1278 * @param[out] localX On return, the X-coordinate relative to the actor.
1279 * @param[out] localY On return, the Y-coordinate relative to the actor.
1280 * @param[in] screenX The screen X-coordinate.
1281 * @param[in] screenY The screen Y-coordinate.
1282 * @return True if the conversion succeeded.
1284 bool ScreenToLocal(const RenderTask& renderTask, float& localX, float& localY, float screenX, float screenY) const;
1287 * Converts from the actor's coordinate system to screen coordinates.
1288 * @note The actor coordinates are relative to the top-left (0.0, 0.0, 0.5)
1289 * @param[in] viewMatrix The view-matrix
1290 * @param[in] projectionMatrix The projection-matrix
1291 * @param[in] viewport The view-port
1292 * @param[out] localX On return, the X-coordinate relative to the actor.
1293 * @param[out] localY On return, the Y-coordinate relative to the actor.
1294 * @param[in] screenX The screen X-coordinate.
1295 * @param[in] screenY The screen Y-coordinate.
1296 * @return True if the conversion succeeded.
1298 bool ScreenToLocal(const Matrix& viewMatrix,
1299 const Matrix& projectionMatrix,
1300 const Viewport& viewport,
1304 float screenY) const;
1307 * Sets whether the actor should receive a notification when touch or hover motion events leave
1308 * the boundary of the actor.
1310 * @note By default, this is set to false as most actors do not require this.
1311 * @note Need to connect to the SignalTouch or SignalHover to actually receive this event.
1313 * @param[in] required Should be set to true if a Leave event is required
1315 void SetLeaveRequired(bool required)
1317 mLeaveRequired = required;
1321 * This returns whether the actor requires touch or hover events whenever touch or hover motion events leave
1322 * the boundary of the actor.
1323 * @return true if a Leave event is required, false otherwise.
1325 bool GetLeaveRequired() const
1327 return mLeaveRequired;
1331 * @copydoc Dali::Actor::SetKeyboardFocusable()
1333 void SetKeyboardFocusable(bool focusable)
1335 mKeyboardFocusable = focusable;
1339 * @copydoc Dali::Actor::IsKeyboardFocusable()
1341 bool IsKeyboardFocusable() const
1343 return mKeyboardFocusable;
1347 * Query whether the application or derived actor type requires intercept touch events.
1348 * @return True if intercept touch events are required.
1350 bool GetInterceptTouchRequired() const
1352 return !mInterceptTouchedSignal.Empty();
1356 * Query whether the application or derived actor type requires touch events.
1357 * @return True if touch events are required.
1359 bool GetTouchRequired() const
1361 return !mTouchedSignal.Empty();
1365 * Query whether the application or derived actor type requires hover events.
1366 * @return True if hover events are required.
1368 bool GetHoverRequired() const
1370 return !mHoveredSignal.Empty();
1374 * Query whether the application or derived actor type requires wheel events.
1375 * @return True if wheel events are required.
1377 bool GetWheelEventRequired() const
1379 return !mWheelEventSignal.Empty();
1383 * Query whether the actor is actually hittable. This method checks whether the actor is
1384 * sensitive, has the visibility flag set to true and is not fully transparent.
1385 * @return true, if it can be hit, false otherwise.
1387 bool IsHittable() const
1389 return IsSensitive() && IsVisible() && (GetCurrentWorldColor().a > FULLY_TRANSPARENT) && IsNodeConnected();
1393 * Query whether the actor captures all touch after it starts even if touch leaves its boundary.
1394 * @return true, if it captures all touch after start
1396 bool CapturesAllTouchAfterStart() const
1398 return mCaptureAllTouchAfterStart;
1402 * Sets the touch area offset of an actor.
1403 * @param [in] offset The new offset of area (left, right, bottom, top).
1405 void SetTouchAreaOffset(Rect<int> offset)
1407 mTouchAreaOffset = offset;
1411 * Retrieve the Actor's touch area offset.
1412 * @return The Actor's touch area offset.
1414 const Rect<int>& GetTouchAreaOffset() const
1416 return mTouchAreaOffset;
1422 * Retrieve the gesture data associated with this actor. The first call to this method will
1423 * allocate space for the ActorGestureData so this should only be called if an actor really does
1425 * @return Reference to the ActorGestureData for this actor.
1426 * @note Once the gesture-data is created for an actor it is likely that gestures are required
1427 * throughout the actor's lifetime so it will only be deleted when the actor is destroyed.
1429 ActorGestureData& GetGestureData();
1432 * Queries whether the actor requires the gesture type.
1433 * @param[in] type The gesture type.
1434 * @return True if the gesture is required, false otherwise.
1436 bool IsGestureRequired(GestureType::Value type) const;
1441 * Used by the EventProcessor to emit intercept touch event signals.
1442 * @param[in] touch The touch data.
1443 * @return True if the event was intercepted.
1445 bool EmitInterceptTouchEventSignal(const Dali::TouchEvent& touch);
1448 * Used by the EventProcessor to emit touch event signals.
1449 * @param[in] touch The touch data.
1450 * @return True if the event was consumed.
1452 bool EmitTouchEventSignal(const Dali::TouchEvent& touch);
1455 * Used by the EventProcessor to emit hover event signals.
1456 * @param[in] event The hover event.
1457 * @return True if the event was consumed.
1459 bool EmitHoverEventSignal(const Dali::HoverEvent& event);
1462 * Used by the EventProcessor to emit wheel event signals.
1463 * @param[in] event The wheel event.
1464 * @return True if the event was consumed.
1466 bool EmitWheelEventSignal(const Dali::WheelEvent& event);
1469 * @brief Emits the visibility change signal for this actor and all its children.
1470 * @param[in] visible Whether the actor has become visible or not.
1471 * @param[in] type Whether the actor's visible property has changed or a parent's.
1473 void EmitVisibilityChangedSignal(bool visible, DevelActor::VisibilityChange::Type type);
1476 * @brief Emits the layout direction change signal for this actor and all its children.
1477 * @param[in] type Whether the actor's layout direction property has changed or a parent's.
1479 void EmitLayoutDirectionChangedSignal(LayoutDirection::Type type);
1482 * @copydoc DevelActor::InterceptTouchedSignal()
1484 Dali::Actor::TouchEventSignalType& InterceptTouchedSignal()
1486 return mInterceptTouchedSignal;
1490 * @copydoc Dali::Actor::TouchedSignal()
1492 Dali::Actor::TouchEventSignalType& TouchedSignal()
1494 return mTouchedSignal;
1498 * @copydoc Dali::Actor::HoveredSignal()
1500 Dali::Actor::HoverSignalType& HoveredSignal()
1502 return mHoveredSignal;
1506 * @copydoc Dali::Actor::WheelEventSignal()
1508 Dali::Actor::WheelEventSignalType& WheelEventSignal()
1510 return mWheelEventSignal;
1514 * @copydoc Dali::Actor::OnSceneSignal()
1516 Dali::Actor::OnSceneSignalType& OnSceneSignal()
1518 return mOnSceneSignal;
1522 * @copydoc Dali::Actor::OffSceneSignal()
1524 Dali::Actor::OffSceneSignalType& OffSceneSignal()
1526 return mOffSceneSignal;
1530 * @copydoc Dali::Actor::OnRelayoutSignal()
1532 Dali::Actor::OnRelayoutSignalType& OnRelayoutSignal()
1534 return mOnRelayoutSignal;
1538 * @copydoc DevelActor::VisibilityChangedSignal
1540 DevelActor::VisibilityChangedSignalType& VisibilityChangedSignal()
1542 return mVisibilityChangedSignal;
1546 * @copydoc LayoutDirectionChangedSignal
1548 Dali::Actor::LayoutDirectionChangedSignalType& LayoutDirectionChangedSignal()
1550 return mLayoutDirectionChangedSignal;
1554 * @copydoc DevelActor::ChildAddedSignal
1556 DevelActor::ChildChangedSignalType& ChildAddedSignal();
1559 * @copydoc DevelActor::ChildRemovedSignal
1561 DevelActor::ChildChangedSignalType& ChildRemovedSignal();
1564 * @copydoc DevelActor::ChildOrderChangedSignal
1566 DevelActor::ChildOrderChangedSignalType& ChildOrderChangedSignal();
1569 * Connects a callback function with the object's signals.
1570 * @param[in] object The object providing the signal.
1571 * @param[in] tracker Used to disconnect the signal.
1572 * @param[in] signalName The signal to connect to.
1573 * @param[in] functor A newly allocated FunctorDelegate.
1574 * @return True if the signal was connected.
1575 * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
1577 static bool DoConnectSignal(BaseObject* object,
1578 ConnectionTrackerInterface* tracker,
1579 const std::string& signalName,
1580 FunctorDelegate* functor);
1583 * Performs actions as requested using the action name.
1584 * @param[in] object The object on which to perform the action.
1585 * @param[in] actionName The action to perform.
1586 * @param[in] attributes The attributes with which to perfrom this action.
1587 * @return true if the action was done.
1589 static bool DoAction(BaseObject* object,
1590 const std::string& actionName,
1591 const Property::Map& attributes);
1597 * For use in derived classes.
1598 * This should only be called by Animation, when the actor is resized using Animation::Resize().
1600 virtual void OnSizeAnimation(Animation& animation, const Vector3& targetSize)
1613 * Protected Constructor. See Actor::New().
1614 * The second-phase construction Initialize() member should be called immediately after this.
1615 * @param[in] derivedType The derived type of actor (if any).
1616 * @param[in] reference to the node
1618 Actor(DerivedType derivedType, const SceneGraph::Node& node);
1621 * Second-phase constructor. Must be called immediately after creating a new Actor;
1623 void Initialize(void);
1626 * A reference counted object may only be deleted by calling Unreference()
1631 * Called on a child during Add() when the parent actor is connected to the Scene.
1632 * @param[in] parentDepth The depth of the parent in the hierarchy.
1634 void ConnectToScene(uint32_t parentDepth);
1637 * Helper for ConnectToScene, to recursively connect a tree of actors.
1638 * This is atomic i.e. not interrupted by user callbacks.
1639 * @param[in] depth The depth in the hierarchy of the actor
1640 * @param[out] connectionList On return, the list of connected actors which require notification.
1642 void RecursiveConnectToScene(ActorContainer& connectionList, uint32_t depth);
1645 * Connect the Node associated with this Actor to the scene-graph.
1647 void ConnectToSceneGraph();
1650 * Helper for ConnectToScene, to notify a connected actor through the public API.
1652 void NotifyStageConnection();
1655 * Called on a child during Remove() when the actor was previously on the Stage.
1657 void DisconnectFromStage();
1660 * Helper for DisconnectFromStage, to recursively disconnect a tree of actors.
1661 * This is atomic i.e. not interrupted by user callbacks.
1662 * @param[out] disconnectionList On return, the list of disconnected actors which require notification.
1664 void RecursiveDisconnectFromStage(ActorContainer& disconnectionList);
1667 * Disconnect the Node associated with this Actor from the scene-graph.
1669 void DisconnectFromSceneGraph();
1672 * Helper for DisconnectFromStage, to notify a disconnected actor through the public API.
1674 void NotifyStageDisconnection();
1677 * When the Actor is OnScene, checks whether the corresponding Node is connected to the scene graph.
1678 * @return True if the Actor is OnScene & has a Node connected to the scene graph.
1680 bool IsNodeConnected() const;
1684 * Trigger a rebuild of the actor depth tree from this root
1685 * If a Layer3D is encountered, then this doesn't descend any further.
1686 * The mSortedDepth of each actor is set appropriately.
1688 void RebuildDepthTree();
1692 * Traverse the actor tree, inserting actors into the depth tree in sibling order.
1693 * @param[in] sceneGraphNodeDepths A vector capturing the nodes and their depth index
1694 * @param[in,out] depthIndex The current depth index (traversal index)
1696 void DepthTraverseActorTree(OwnerPointer<SceneGraph::NodeDepths>& sceneGraphNodeDepths, int32_t& depthIndex);
1699 // Default property extensions from Object
1702 * @copydoc Dali::Internal::Object::SetDefaultProperty()
1704 void SetDefaultProperty(Property::Index index, const Property::Value& propertyValue) override;
1707 * @copydoc Dali::Internal::Object::SetSceneGraphProperty()
1709 void SetSceneGraphProperty(Property::Index index, const PropertyMetadata& entry, const Property::Value& value) override;
1712 * @copydoc Dali::Internal::Object::GetDefaultProperty()
1714 Property::Value GetDefaultProperty(Property::Index index) const override;
1717 * @copydoc Dali::Internal::Object::GetDefaultPropertyCurrentValue()
1719 Property::Value GetDefaultPropertyCurrentValue(Property::Index index) const override;
1722 * @copydoc Dali::Internal::Object::OnNotifyDefaultPropertyAnimation()
1724 void OnNotifyDefaultPropertyAnimation(Animation& animation, Property::Index index, const Property::Value& value, Animation::Type animationType) override;
1727 * @copydoc Dali::Internal::Object::GetSceneObjectAnimatableProperty()
1729 const SceneGraph::PropertyBase* GetSceneObjectAnimatableProperty(Property::Index index) const override;
1732 * @copydoc Dali::Internal::Object::GetSceneObjectInputProperty()
1734 const PropertyInputImpl* GetSceneObjectInputProperty(Property::Index index) const override;
1737 * @copydoc Dali::Internal::Object::GetPropertyComponentIndex()
1739 int32_t GetPropertyComponentIndex(Property::Index index) const override;
1742 * @copydoc Dali::Internal::Object::IsAnimationPossible()
1744 bool IsAnimationPossible() const override
1750 * Retrieve the actor's node.
1751 * @return The node used by this actor
1753 const SceneGraph::Node& GetNode() const;
1756 * @copydoc Dali::DevelActor::Raise()
1761 * @copydoc Dali::DevelActor::Lower()
1766 * @copydoc Dali::DevelActor::RaiseToTop()
1771 * @copydoc Dali::DevelActor::LowerToBottom()
1773 void LowerToBottom();
1776 * @copydoc Dali::DevelActor::RaiseAbove()
1778 void RaiseAbove(Internal::Actor& target);
1781 * @copydoc Dali::DevelActor::LowerBelow()
1783 void LowerBelow(Internal::Actor& target);
1787 * Sets the scene which this actor is added to.
1788 * @param[in] scene The scene
1790 void SetScene(Scene& scene)
1796 * Gets the scene which this actor is added to.
1799 Scene& GetScene() const
1804 LayoutDirection::Type GetLayoutDirection() const
1806 return mLayoutDirection;
1819 struct AnimatedSizeFlag
1832 // Remove default constructor and copy constructor
1834 Actor(const Actor&) = delete;
1835 Actor& operator=(const Actor& rhs) = delete;
1838 * Set the actor's parent.
1839 * @param[in] parent The new parent.
1841 void SetParent(ActorParent* parent);
1844 * For use in derived classes, called after Initialize()
1846 virtual void OnInitialize()
1851 * For use in internal derived classes.
1852 * This is called during ConnectToScene(), after the actor has finished adding its node to the scene-graph.
1853 * The derived class must not modify the actor hierachy (Add/Remove children) during this callback.
1855 virtual void OnSceneConnectionInternal()
1860 * For use in internal derived classes.
1861 * This is called during DisconnectFromStage(), before the actor removes its node from the scene-graph.
1862 * The derived class must not modify the actor hierachy (Add/Remove children) during this callback.
1864 virtual void OnSceneDisconnectionInternal()
1869 * For use in external (CustomActor) derived classes.
1870 * This is called after the atomic ConnectToScene() traversal has been completed.
1872 virtual void OnSceneConnectionExternal(int depth)
1877 * For use in external (CustomActor) derived classes.
1878 * This is called after the atomic DisconnectFromStage() traversal has been completed.
1880 virtual void OnSceneDisconnectionExternal()
1885 * For use in derived classes; this is called after Add() has added a child.
1886 * @param[in] child The child that was added.
1888 virtual void OnChildAdd(Actor& child)
1893 * For use in derived classes; this is called after Remove() has attempted to remove a child( regardless of whether it succeeded or not ).
1894 * @param[in] child The child that was removed.
1896 virtual void OnChildRemove(Actor& child)
1901 * For use in derived classes.
1902 * This is called after SizeSet() has been called.
1904 virtual void OnSizeSet(const Vector3& targetSize)
1909 * @brief Retrieves the cached event side value of a default property.
1910 * @param[in] index The index of the property
1911 * @param[out] value Is set with the cached value of the property if found.
1912 * @return True if value set, false otherwise.
1914 bool GetCachedPropertyValue(Property::Index index, Property::Value& value) const;
1917 * @brief Retrieves the current value of a default property from the scene-graph.
1918 * @param[in] index The index of the property
1919 * @param[out] value Is set with the current scene-graph value of the property
1920 * @return True if value set, false otherwise.
1922 bool GetCurrentPropertyValue(Property::Index index, Property::Value& value) const;
1925 * @brief Ensure the relayouter is allocated
1927 Relayouter& EnsureRelayouter();
1930 * @brief Apply the size set policy to the input size
1932 * @param[in] size The size to apply the policy to
1933 * @return Return the adjusted size
1935 Vector2 ApplySizeSetPolicy(const Vector2& size);
1938 * Retrieve the parent object of an Actor.
1939 * @return The parent object, or NULL if the Actor does not have a parent.
1941 Object* GetParentObject() const override
1943 return static_cast<Actor*>(mParent);
1947 * @brief Get the current position of the actor in screen coordinates.
1949 * @return Returns the screen position of actor
1951 const Vector2 GetCurrentScreenPosition() const;
1954 * Sets the visibility flag of an actor.
1955 * @param[in] visible The new visibility flag.
1956 * @param[in] sendMessage Whether to send a message to the update thread or not.
1958 void SetVisibleInternal(bool visible, SendMessage::Type sendMessage);
1961 * @copydoc ActorParent::SetSiblingOrderOfChild
1963 void SetSiblingOrderOfChild(Actor& child, uint32_t order) override;
1966 * @copydoc ActorParent::GetSiblingOrderOfChild
1968 uint32_t GetSiblingOrderOfChild(const Actor& child) const override;
1971 * @copydoc ActorParent::RaiseChild
1973 void RaiseChild(Actor& child) override;
1976 * @copydoc ActorParent::LowerChild
1978 void LowerChild(Actor& child) override;
1981 * @copydoc ActorParent::RaiseChildToTop
1983 void RaiseChildToTop(Actor& child) override;
1986 * @copydoc ActorParent::LowerChildToBottom
1988 void LowerChildToBottom(Actor& child) override;
1991 * @copydoc ActorParent::RaiseChildAbove
1993 void RaiseChildAbove(Actor& child, Actor& target) override;
1996 * @copydoc ActorParent::LowerChildBelow()
1998 void LowerChildBelow(Actor& child, Actor& target) override;
2001 * Set whether a child actor inherits it's parent's layout direction. Default is to inherit.
2002 * @param[in] inherit - true if the actor should inherit layout direction, false otherwise.
2004 void SetInheritLayoutDirection(bool inherit);
2007 * Returns whether the actor inherits it's parent's layout direction.
2008 * @return true if the actor inherits it's parent's layout direction, false otherwise.
2010 bool IsLayoutDirectionInherited() const
2012 return mInheritLayoutDirection;
2016 * @brief Propagates layout direction recursively.
2017 * @param[in] direction New layout direction.
2019 void InheritLayoutDirectionRecursively(Dali::LayoutDirection::Type direction, bool set = false);
2022 * @brief Sets the update size hint of an actor.
2023 * @param [in] updateSizeHint The update size hint.
2025 void SetUpdateSizeHint(const Vector2& updateSizeHint);
2028 * @brief Recursively emits the visibility-changed-signal on the actor tree.
2030 * @param[in] visible The new visibility of the actor
2031 * @param[in] type Whether the actor's visible property has changed or a parent's
2033 void EmitVisibilityChangedSignalRecursively(bool visible,
2034 DevelActor::VisibilityChange::Type type);
2037 ActorParentImpl mParentImpl; ///< Implementation of ActorParent;
2038 ActorParent* mParent; ///< Each actor (except the root) can have one parent
2039 Scene* mScene; ///< The scene the actor is added to
2040 RendererContainer* mRenderers; ///< Renderer container
2041 Vector3* mParentOrigin; ///< NULL means ParentOrigin::DEFAULT. ParentOrigin is non-animatable
2042 Vector3* mAnchorPoint; ///< NULL means AnchorPoint::DEFAULT. AnchorPoint is non-animatable
2043 Relayouter* mRelayoutData; ///< Struct to hold optional collection of relayout variables
2044 ActorGestureData* mGestureData; ///< Optional Gesture data. Only created when actor requires gestures
2047 Dali::Actor::TouchEventSignalType mInterceptTouchedSignal;
2048 Dali::Actor::TouchEventSignalType mTouchedSignal;
2049 Dali::Actor::HoverSignalType mHoveredSignal;
2050 Dali::Actor::WheelEventSignalType mWheelEventSignal;
2051 Dali::Actor::OnSceneSignalType mOnSceneSignal;
2052 Dali::Actor::OffSceneSignalType mOffSceneSignal;
2053 Dali::Actor::OnRelayoutSignalType mOnRelayoutSignal;
2054 DevelActor::VisibilityChangedSignalType mVisibilityChangedSignal;
2055 Dali::Actor::LayoutDirectionChangedSignalType mLayoutDirectionChangedSignal;
2057 Quaternion mTargetOrientation; ///< Event-side storage for orientation
2058 Vector4 mTargetColor; ///< Event-side storage for color
2059 Vector3 mTargetSize; ///< Event-side storage for size (not a pointer as most actors will have a size)
2060 Vector3 mTargetPosition; ///< Event-side storage for position (not a pointer as most actors will have a position)
2061 Vector3 mTargetScale; ///< Event-side storage for scale
2062 Vector3 mAnimatedSize; ///< Event-side storage for size animation
2063 Rect<int> mTouchAreaOffset; ///< touch area offset (left, right, bottom, top)
2065 ConstString mName; ///< Name of the actor
2066 uint32_t mSortedDepth; ///< The sorted depth index. A combination of tree traversal and sibling order.
2067 int16_t mDepth; ///< The depth in the hierarchy of the actor. Only 32,767 levels of depth are supported
2068 uint16_t mUseAnimatedSize; ///< Whether the size is animated.
2070 const bool mIsRoot : 1; ///< Flag to identify the root actor
2071 const bool mIsLayer : 1; ///< Flag to identify that this is a layer
2072 bool mIsOnScene : 1; ///< Flag to identify whether the actor is on-scene
2073 bool mSensitive : 1; ///< Whether the actor emits touch event signals
2074 bool mLeaveRequired : 1; ///< Whether a touch event signal is emitted when the a touch leaves the actor's bounds
2075 bool mKeyboardFocusable : 1; ///< Whether the actor should be focusable by keyboard navigation
2076 bool mOnSceneSignalled : 1; ///< Set to true before OnSceneConnection signal is emitted, and false before OnSceneDisconnection
2077 bool mInsideOnSizeSet : 1; ///< Whether we are inside OnSizeSet
2078 bool mInheritPosition : 1; ///< Cached: Whether the parent's position should be inherited.
2079 bool mInheritOrientation : 1; ///< Cached: Whether the parent's orientation should be inherited.
2080 bool mInheritScale : 1; ///< Cached: Whether the parent's scale should be inherited.
2081 bool mPositionUsesAnchorPoint : 1; ///< Cached: Whether the position uses the anchor point or not.
2082 bool mVisible : 1; ///< Cached: Whether the actor is visible or not.
2083 bool mInheritLayoutDirection : 1; ///< Whether the actor inherits the layout direction from parent.
2084 bool mCaptureAllTouchAfterStart : 1; ///< Whether the actor should capture all touch after touch starts even if the motion moves outside of the actor area.
2085 bool mIsBlendEquationSet : 1; ///< Flag to identify whether the Blend equation is set
2086 bool mNeedGesturePropagation : 1; ///< Whether the parent listens for gesture events or not
2087 LayoutDirection::Type mLayoutDirection : 2; ///< Layout direction, Left to Right or Right to Left.
2088 DrawMode::Type mDrawMode : 3; ///< Cached: How the actor and its children should be drawn
2089 ColorMode mColorMode : 3; ///< Cached: Determines whether mWorldColor is inherited
2090 ClippingMode::Type mClippingMode : 3; ///< Cached: Determines which clipping mode (if any) to use.
2091 DevelBlendEquation::Type mBlendEquation : 16; ///< Cached: Determines which blend equation will be used to render renderers.
2094 static ActorContainer mNullChildren; ///< Empty container (shared by all actors, returned by GetChildren() const)
2096 struct PropertyHandler;
2097 struct SiblingHandler;
2099 friend class ActorParentImpl; // Allow impl to call private methods on actor
2102 } // namespace Internal
2104 // Helpers for public-api forwarding methods
2106 inline Internal::Actor& GetImplementation(Dali::Actor& actor)
2108 DALI_ASSERT_ALWAYS(actor && "Actor handle is empty");
2110 BaseObject& handle = actor.GetBaseObject();
2112 return static_cast<Internal::Actor&>(handle);
2115 inline const Internal::Actor& GetImplementation(const Dali::Actor& actor)
2117 DALI_ASSERT_ALWAYS(actor && "Actor handle is empty");
2119 const BaseObject& handle = actor.GetBaseObject();
2121 return static_cast<const Internal::Actor&>(handle);
2126 #endif // DALI_INTERNAL_ACTOR_H