1 #ifndef __DALI_TOOLKIT_INTERNAL_SCROLL_VIEW_H__
2 #define __DALI_TOOLKIT_INTERNAL_SCROLL_VIEW_H__
5 * Copyright (c) 2015 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/adaptor-framework/timer.h>
23 #include <dali/public-api/animation/animation.h>
24 #include <dali/public-api/object/property-notification.h>
27 #include <dali-toolkit/public-api/controls/control-impl.h>
28 #include <dali-toolkit/internal/controls/scrollable/scroll-view/scroll-base-impl.h>
29 #include <dali-toolkit/public-api/controls/scrollable/scroll-view/scroll-view.h>
30 #include <dali-toolkit/public-api/controls/scrollable/scroll-view/scroll-view-effect.h>
42 typedef IntrusivePtr<ScrollView> ScrollViewPtr;
44 class ScrollInternalConstraints;
45 typedef IntrusivePtr<ScrollInternalConstraints> ScrollInternalConstraintsPtr;
47 class ScrollOvershootIndicator;
48 typedef IntrusivePtr<ScrollOvershootIndicator> ScrollOvershootIndicatorPtr;
51 * @copydoc Toolkit::ScrollView
53 class ScrollView : public ScrollBase
58 * FindDirection specifies how searching is conducted within the Find... routines.
62 None = -3, ///< Includes none within the search query.
63 All = -2, ///< Includes all within the search query.
64 Left = -1, ///< Includes only those not right !(>)
65 Right = 1, ///< Includes only those right (>)
66 Up = -1, ///< Includes only those not below !(>)
67 Down = 1, ///< Includes only those below (>)
68 Out = -1, ///< Includes only those not infront !(>)
69 In = 1 ///< Includes only those infront (>)
74 LockPossible = 0, ///< Locking is possible, but not set in stone yet.
75 LockHorizontal, ///< Locking is set to horizontal. (can pan vertically)
76 LockVertical, ///< Locking is set to vertical. (can pan horizontally)
77 LockNone ///< Locking is set to none (free panning).
82 AnimatingInternalX = 0x01, ///< animating mPropertyX due to externally requested ScrollTo or internal snapping operation
83 AnimatingInternalY = 0x02, ///< animating mPropertyY due to externally requested ScrollTo or internal snapping operation
84 SnappingInternalX = 0x04, ///< snapping mPropertyX back to mPropertyPreScroll x value to remove x overshoot over time
85 SnappingInternalY = 0x08, ///< snapping mPropertyY back to mPropertyPreScroll y value to remove y overshoot over time
88 static const unsigned int SCROLL_X_STATE_MASK = AnimatingInternalX | SnappingInternalX;
89 static const unsigned int SCROLL_Y_STATE_MASK = AnimatingInternalY | SnappingInternalY;
90 static const unsigned int SCROLL_ANIMATION_FLAGS = AnimatingInternalX | AnimatingInternalY;
91 static const unsigned int SNAP_ANIMATION_FLAGS = SnappingInternalX | SnappingInternalY;
95 typedef std::vector<Dali::Toolkit::ScrollViewEffect> ScrollViewEffectContainer; ///< Container of Dali::Toolkit::ScrollViewEffect
96 typedef ScrollViewEffectContainer::iterator ScrollViewEffectIter; ///< Iterator for Dali::Toolkit::ScrollViewEffectContainer
101 * Create a new ScrollView.
102 * @return A public handle to the newly allocated ScrollView.
104 static Dali::Toolkit::ScrollView New();
109 * @copydoc Toolkit::ScrollView::GetScrollSnapAlphaFunction
111 AlphaFunction GetScrollSnapAlphaFunction() const;
114 * @copydoc Toolkit::ScrollView::SetScrollSnapAlphaFunction
116 void SetScrollSnapAlphaFunction(AlphaFunction alpha);
119 * @copydoc Toolkit::ScrollView::GetScrollFlickAlphaFunction
121 AlphaFunction GetScrollFlickAlphaFunction() const;
124 * @copydoc Toolkit::ScrollView::SetScrollFlickAlphaFunction
126 void SetScrollFlickAlphaFunction(AlphaFunction alpha);
129 * @copydoc Toolkit::ScrollView::GetScrollSnapDuration
131 float GetScrollSnapDuration() const;
134 * @copydoc Toolkit::ScrollView::SetScrollSnapDuration
136 void SetScrollSnapDuration(float time);
139 * @copydoc Toolkit::ScrollView::GetScrollFlickDuration
141 float GetScrollFlickDuration() const;
144 * @copydoc Toolkit::ScrollView::SetScrollFlickDuration
146 void SetScrollFlickDuration(float time);
149 * @copydoc Toolkit::ScrollView::ApplyEffect
151 void ApplyEffect(Toolkit::ScrollViewEffect effect);
154 * @copydoc Toolkit::ScrollView::RemoveEffect
156 void RemoveEffect(Toolkit::ScrollViewEffect effect);
159 * @copydoc Toolkit::ScrollView::RemoveAllEffects
161 void RemoveAllEffects();
164 * @copydoc Toolkit::ScrollView::ApplyConstraintToChildren
166 void ApplyConstraintToChildren(Constraint constraint);
169 * @copydoc Toolkit::ScrollView::RemoveConstraintsFromChildren
171 void RemoveConstraintsFromChildren();
174 * @copydoc Toolkit::ScrollView::GetRulerX
176 const RulerPtr GetRulerX() const;
179 * @copydoc Toolkit::ScrollView::GetRulerY
181 const RulerPtr GetRulerY() const;
184 * @copydoc Toolkit::ScrollView::SetRulerX
186 void SetRulerX(RulerPtr ruler);
189 * @copydoc Toolkit::ScrollView::SetRulerY
191 void SetRulerY(RulerPtr ruler);
194 * Retrieve the touch sensitivity.
196 * @return whether the touch sensitivity is true or false.
198 bool GetScrollSensitive();
201 * @copydoc Toolkit::ScrollView::SetScrollSensitive
203 void SetScrollSensitive(bool sensitive);
206 * @copydoc Toolkit::ScrollView::SetMaxOvershoot
208 void SetMaxOvershoot(float overshootX, float overshootY);
211 * @copydoc Toolkit::ScrollView::SetSnapOvershootAlphaFunction
213 void SetSnapOvershootAlphaFunction(AlphaFunction alpha);
216 * Retrieve the duartion of Snap Overshoot animation
218 * @return the duration.
220 float GetSnapOvershootDuration();
223 * @copydoc Toolkit::ScrollView::SetSnapOvershootDuration
225 void SetSnapOvershootDuration(float duration);
228 * Retrieve whether Actor Auto-Snap mode is enabled or not.
230 * @return Actor Auto-Snap mode Enabled flag.
232 bool GetActorAutoSnap();
235 * @copydoc Toolkit::ScrollView::SetActorAutoSnap
237 void SetActorAutoSnap(bool enable);
240 * Enables or Disables Auto Resizing mode for ScrollView contents.
242 * When enabled, the ScrollView's X/Y Domains are restricted to the
243 * dimensions of the content's bounds, which may change as Actors are
244 * Added/Removed, and repositioned.
246 * @note This has been disabled for now, as this requires some fundamental
247 * changes to the way Actors positions and bounds are retrieved.
248 * (currently only constraints have these initial state knowledge)
250 * @param[in] enable Enables (true), or disables (false) Auto Resize.
252 void SetAutoResize(bool enable);
255 * Returns whether the wrap mode has been enabled (true) or not (false).
257 * @return Wrap Mode Enabled flag.
259 bool GetWrapMode() const;
262 * @copydoc Toolkit::ScrollView::SetWrapMode
264 void SetWrapMode(bool enable);
267 * @copydoc Toolkit::ScrollView::GetScrollupdateDistance
269 int GetScrollUpdateDistance() const;
272 * @copydoc Toolkit::ScrollView::SetScrollUpdateDistance
274 void SetScrollUpdateDistance(int distance);
277 * @copydoc Toolkit::ScrollView::GetAxisAutoLock
279 bool GetAxisAutoLock() const;
282 * @copydoc Toolkit::ScrollView::SetAxisAutoLock
284 void SetAxisAutoLock(bool enable);
287 * @copydoc Toolkit::ScrollView::GetAxisAutoLockGradient
289 float GetAxisAutoLockGradient() const;
292 * @copydoc Toolkit::ScrollView::SetAxisAutoLockGradient
294 void SetAxisAutoLockGradient(float gradient);
297 * @copydoc Toolkit::ScrollView::GetFrictionCoefficient
299 float GetFrictionCoefficient() const;
302 * @copydoc Toolkit::ScrollView::SetFrictionCoefficient
304 void SetFrictionCoefficient(float friction);
307 * @copydoc Toolkit::ScrollView::GetFlickSpeedCoefficient
309 float GetFlickSpeedCoefficient() const;
312 * @copydoc Toolkit::ScrollView::SetFlickSpeedCoefficient
314 void SetFlickSpeedCoefficient(float speed);
317 * @copydoc Toolkit::ScrollView::GetMinimumDistanceForFlick
319 Vector2 GetMinimumDistanceForFlick() const;
322 * @copydoc Toolkit::ScrollView::SetMinimumDistanceForFlick
324 void SetMinimumDistanceForFlick( const Vector2& distance );
327 * @copydoc Toolkit::ScrollView::GetMinimumSpeedForFlick
329 float GetMinimumSpeedForFlick() const;
332 * @copydoc Toolkit::ScrollView::SetMinimumSpeedForFlick
334 void SetMinimumSpeedForFlick( float speed );
337 * @copydoc Toolkit::ScrollView::GetMaxFlickSpeed
339 float GetMaxFlickSpeed() const;
342 * @copydoc Toolkit::ScrollView::SetMaxFlickSpeed
344 void SetMaxFlickSpeed(float speed);
347 * @copydoc Toolkit::ScrollView::GetWheelScrollDistanceStep
349 Vector2 GetWheelScrollDistanceStep() const;
352 * @copydoc Toolkit::ScrollView::SetWheelScrollDistanceStep
354 void SetWheelScrollDistanceStep(Vector2 step);
357 * @copydoc Toolkit::ScrollView::GetCurrentPage
359 unsigned int GetCurrentPage() const;
362 * @copydoc Toolkit::ScrollView::GetCurrentScrollPosition
364 Vector2 GetCurrentScrollPosition() const;
367 * @copydoc ScrollTo(const Vector2&)
369 void TransformTo(const Vector2& position,
370 DirectionBias horizontalBias = DirectionBiasNone, DirectionBias verticalBias = DirectionBiasNone);
373 * @copydoc ScrollTo(const Vector2&, float, AlhpaFunction, DirectionBias, DirectionBias)
375 void TransformTo(const Vector2& position, float duration, AlphaFunction alpha,
376 DirectionBias horizontalBias = DirectionBiasNone, DirectionBias verticalBias = DirectionBiasNone);
379 * @copydoc Toolkit::ScrollView::ScrollTo(const Vector2 &position)
381 void ScrollTo(const Vector2 &position);
384 * @copydoc Toolkit::Scrollable::ScrollTo(const Vector2& position, float duration)
386 void ScrollTo(const Vector2& position, float duration);
389 * @copydoc Toolkit::Scrollable::ScrollTo(const Vector2& position, float duration, AlphaFunction alpha)
391 void ScrollTo(const Vector2& position, float duration, AlphaFunction alpha);
394 * @copydoc Toolkit::ScrollView::ScrollTo(const Vector2 &position, float duration, DirectionBias horizontalBias, DirectionBias verticalBias)
396 void ScrollTo(const Vector2& position, float duration,
397 DirectionBias horizontalBias, DirectionBias verticalBias);
400 * @copydoc Toolkit::ScrollView::ScrollTo(const Vector2 &position, float duration, AlphaFunction alpha, DirectionBias horizontalBias, DirectionBias verticalBias)
402 void ScrollTo(const Vector2& position, float duration, AlphaFunction alpha,
403 DirectionBias horizontalBias, DirectionBias verticalBias);
406 * @copydoc Toolkit::ScrollView::ScrollTo(unsigned int page)
408 void ScrollTo(unsigned int page);
411 * @copydoc Toolkit::ScrollView::ScrollTo(unsigned int page, float duration, DirectionBias bias)
413 void ScrollTo(unsigned int page, float duration, DirectionBias bias = DirectionBiasNone);
416 * @copydoc Toolkit::ScrollView::ScrollTo(Actor& actor)
418 void ScrollTo(Actor &actor);
421 * @copydoc Toolkit::ScrollView::ScrollTo(Actor& actor, float duration)
423 void ScrollTo(Actor &actor, float duration);
426 * @copydoc Toolkit::ScrollView::SetScrollingDirection()
428 void SetScrollingDirection( Radian direction, Radian threshold );
431 * @copydoc Toolkit::ScrollView::RemoveScrollingDirection()
433 void RemoveScrollingDirection( Radian angle );
436 * Finds the closest Actor to the current center of the ScrollView.
438 * @return A handle to the actor if found, or an empty handle if not.
440 Actor FindClosestActor();
443 * Finds the closest Actor to position in ScrollView
445 * @param[in] position position within ScrollView.
446 * @param[in] dirX Whether to search only those elements that are Left,Right, or All
447 * @param[in] dirY Whether to search only those elements that are Up,Down, or All
448 * @param[in] dirZ Whether to search only those elements that are Out,In, or All
449 * @return A handle to the actor if found, or an empty handle if not.
451 Actor FindClosestActorToPosition(const Vector3& position, FindDirection dirX = All, FindDirection dirY = All, FindDirection dirZ = All);
454 * @copydoc Toolkit::ScrollView::ScrollToSnapPoint
456 bool ScrollToSnapPoint();
461 void StopAnimation(void);
464 * Stops the input animation
466 * @param[in] the animation to stop
468 void StopAnimation(Animation& animation);
471 * Animates to position transform.
473 * @param[in] position The position to animate to
474 * @param[in] positionDuration The number of seconds this animation should run for in each axis.
475 * @param[in] alpha The easing alpha function to use.
476 * @param[in] findShortcuts (optional) Whether to find the shortest route (in Wrap mode)
477 * @param[in] horizontalBias (optional) Whether to bias animation to left or right (or no biasing)
478 * @param[in] verticalBias (optional) Whether to bias animation to top or bottom (or no biasing)
479 * @return True if animation necessary and taking place to reach desired transform.
481 bool AnimateTo(const Vector2& position, const Vector2& positionDuration,
482 AlphaFunction alpha, bool findShortcuts = true,
483 DirectionBias horizontalBias = DirectionBiasNone, DirectionBias verticalBias = DirectionBiasNone,
484 SnapType snapType = Snap);
487 * @copydoc Toolkit::Scrollable::AddOverlay()
489 void AddOverlay(Actor actor);
492 * @copydoc Toolkit::Scrollable::RemoveOverlay()
494 void RemoveOverlay(Actor actor);
497 * @copydoc Toolkit::Internal::Scrollable::SetOvershootSize
499 void SetOvershootSize( const Vector2& size );
502 * @copydoc Toolkit::Internal::Scrollable::SetOvershootEffectColor
504 void SetOvershootEffectColor( const Vector4& color );
509 * Called when a property of an object of this type is set.
510 * @param[in] object The object whose property is set.
511 * @param[in] index The property index.
512 * @param[in] value The new property value.
514 static void SetProperty( BaseObject* object, Property::Index index, const Property::Value& value );
517 * Called to retrieve a property of an object of this type.
518 * @param[in] object The object whose property is to be retrieved.
519 * @param[in] index The property index.
520 * @return The current value of the property.
522 static Property::Value GetProperty( BaseObject* object, Property::Index index );
527 * @copydoc Dali::Toolkit::ScrollView::SnapStartedSignal()
529 Toolkit::ScrollView::SnapStartedSignalType& SnapStartedSignal();
532 * Connects a callback function with the object's signals.
533 * @param[in] object The object providing the signal.
534 * @param[in] tracker Used to disconnect the signal.
535 * @param[in] signalName The signal to connect to.
536 * @param[in] functor A newly allocated FunctorDelegate.
537 * @return True if the signal was connected.
538 * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
540 static bool DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor );
542 private: // private overridden functions from CustomActorImpl and Controls
545 * @copydoc Dali::CustomActorImpl::OnSizeAnimation(Animation&, const Vector3&)
547 virtual void OnSizeAnimation(Animation& animation, const Vector3& targetSize);
550 * @copydoc CustomActorImpl::OnSizeSet(const Vector3&)
552 virtual void OnSizeSet( const Vector3& size );
555 * From CustomActorImpl; called after a child has been added to the owning actor.
556 * @param[in] child The child which has been added.
558 virtual void OnChildAdd(Actor& child);
561 * From CustomActorImpl; called shortly before a child is removed from the owning actor.
562 * @param[in] child The child being removed.
564 virtual void OnChildRemove(Actor& child);
567 * From CustomActorImpl; called after a wheelEvent is received by the owning actor.
568 * @param[in] event The wheel event.
569 * @return True if the event should be consumed.
571 virtual bool OnWheelEvent(const WheelEvent& event);
574 * @copydoc Toolkit::Control::OnInitialize()
576 virtual void OnInitialize();
579 * @copydoc CustomActorImpl::OnStageConnection()
581 virtual void OnStageConnection( int depth );
584 * @copydoc CustomActorImpl::OnStageDisconnection()
586 virtual void OnStageDisconnection();
589 * @copydoc Toolkit::Control::OnAccessibilityPan()
591 virtual bool OnAccessibilityPan(PanGesture gesture);
594 * @copydoc Toolkit::Scrollable::EnableScrollOvershoot()
596 virtual void EnableScrollOvershoot(bool enable);
601 * Called after a touchSignal is received by the owning actor.
603 * We don't consume these events as content within the container may consume events.
605 * @param[in] actor The touched actor.
606 * @param[in] touch The touch information.
607 * @return True if the event should be consumed.
609 bool OnTouch( Actor actor, const TouchData& touch );
612 * Start a timer which calls OnTouchDownTimeout()
614 void StartTouchDownTimer();
617 * Stop a timer which calls OnTouchDownTimeout()
619 void StopTouchDownTimer();
622 * Helper to detect when touch-point has been down (outside of pan gesture)
624 bool OnTouchDownTimeout();
627 * Called whenever a snap animation has completed
628 * @param[in] source the Animation instance that has completed.
629 * Resets all scrolling animations and states, leaving current scroll position at SCROLL_POSITION
631 void ResetScrolling();
634 * Updates mScrollInternalPosition, mScrollPrePosition and mScrollPostPosition from their property counterparts
636 void UpdateLocalScrollProperties();
639 * Makes sure scroll values are ready for animated scrolling
641 void PreAnimatedScrollSetup();
644 * Finish an animated scroll, ensuring all scroll properties are updated
647 void FinaliseAnimatedScroll();
650 * Animates the internal x property to the given value
652 * @param[in] position The X position to animate to
653 * @param[in] duration The time in seconds for animation
654 * @param[in] alpha The alpha function to use for animating
656 void AnimateInternalXTo( float position, float duration, AlphaFunction alpha );
659 * Animates the internal y property to the given value
661 * @param[in] position The Y position to animate to
662 * @param[in] duration The time in seconds for animation
663 * @param[in] alpha The alpha function to use for animating
665 void AnimateInternalYTo( float position, float duration, AlphaFunction alpha );
668 * Called whenever a snap animation on the x-axis has completed
669 * @param[in] source the Animation instance that has completed.
671 void OnScrollAnimationFinished( Animation& source );
674 * Called when either the X or Y internal scroll positions have finished snapping back to SCROLL_PRE_POSITION
676 * @param[in] source the Animation instance that has completed.
678 void OnSnapInternalPositionFinished( Animation& source );
681 * Called whenever a snap animation on the x-axis has completed and we need to snap pre scroll
682 * position to our clamped position
683 * @param[in] position The x position to snap pre scroll property to
685 void SnapInternalXTo( float position );
688 * Called whenever a snap animation on the y-axis has completed and we need to snap pre scroll
689 * position to our clamped position
690 * @param[in] position The y position to snap pre scroll property to
692 void SnapInternalYTo( float position );
695 * This is called internally whenever the Scroll Rulers are
696 * modified. This will update the properties: 'scrollPositionMin'
697 * and 'scrollPositionMax' to reflect the changes.
699 void UpdatePropertyDomain();
702 * Called when the gesture starts.
704 void GestureStarted();
707 * Amalgamated Gesture Continuing event
709 * @param[in] panDelta average panning delta from base position (0)
711 void GestureContinuing(const Vector2& panDelta);
714 * Called upon pan gesture event.
716 * @param[in] gesture The gesture event.
718 void OnPan( const PanGesture& pan);
721 * Extension of the above gestures.
723 * @param[in] gesture The gesture event.
725 void OnGestureEx(Gesture::State state);
728 * Performs snapping while taking into account Velocity of gesture
729 * (velocity in pixels/sec)
731 * @param[in] velocity velocity in pixels/sec
733 bool SnapWithVelocity(Vector2 velocity);
736 * Finishes Container Transform
737 * (occurs upon finishing gesture i.e. releasing)
739 void FinishTransform();
742 * Returns overshoot vector based on current position
744 * Overshoot vector is defined as how far outside of bounds
745 * the viewport is trying to view (prior to being clamped).
747 * an overshoot of (100,50), means user is in bottom right corner,
748 * trying to pan +100 to the right, and +50 below. This can be used
749 * to determine an effect, such as stretching.
751 * @param[in] position The position for which you wish to obtain overshoot vector
753 Vector2 GetOvershoot(Vector2& position) const;
756 * Clamps position within the domain set up by X/Y Rulers
758 * @param[in,out] position The position you wish to clamp
760 void ClampPosition(Vector2& position) const;
763 * Clamps position within the domain set up by X/Y Rulers
765 * @param[in,out] position The position you wish to clamp
766 * @param[out] clamped The results of the clamping.
768 void ClampPosition(Vector2& position, ClampState2D &clamped) const;
771 * Wraps position within the domain set up by X/Y Rulers
773 * @note Only wraps if mWrapMode is enabled, and respective domains
776 * @param[in,out] position The position you wish to wrap
778 void WrapPosition(Vector2& position) const;
781 * Updates the main internal scroll constraints with new ruler and domain
784 void UpdateMainInternalConstraint();
787 * Enables/disables the overshoot constraints
789 * @param[in] enabled whether to enable or disable the overshoot constraints
791 void SetOvershootConstraintsEnabled(bool enabled);
794 * Sets internal constraints for this ScrollView.
795 * Many of these internal constraints are based on properties within
798 void SetInternalConstraints();
803 * Construct a new ScrollView.
808 * A reference counted object may only be deleted by calling Unreference()
810 virtual ~ScrollView();
815 * Searches this ScrollView, and attempts to Unbind
816 * systematically this Actor from the ScrollView attached.
818 * @param[in] child The actor to be unbound.
820 virtual void FindAndUnbindActor(Actor child);
823 * Gets position property.
825 * @return The current position
827 Vector2 GetPropertyPrePosition() const;
830 * Gets position property.
832 * @return The current position
834 Vector2 GetPropertyPosition() const;
837 * Handles a Stopped animation. Its position properties need to be saved, and the animation flag
840 void HandleStoppedAnimation();
843 * Handles a Stopped animation (whether the animation completed, or was
844 * manually stopped). Its position properties need to be saved, and the
845 * animation flag switched off.
847 void HandleSnapAnimationFinished();
850 * Checks if the property notifications are active and adds them if not
852 void SetScrollUpdateNotification( bool enabled );
855 * Refresh the ScrollView (used when animating to update application developer of changes)
856 * @return True if the refresh timer should be kept running.
858 void OnScrollUpdateNotification(Dali::PropertyNotification& source);
863 ScrollView(const ScrollView&);
866 ScrollView& operator=(const ScrollView& rhs);
870 unsigned long mTouchDownTime; ///< The touch down time
872 int mGestureStackDepth; ///< How many gestures are currently occuring.
873 Vector2 mPanStartPosition; ///< Where the pan gesture's touch down occured
874 Vector2 mPanDelta; ///< Amount currently panned.
876 unsigned int mScrollStateFlags; ///< flags indicating current state of scrolling
877 // Scroll delegate pre and post position properties...
878 Vector2 mScrollPrePosition; ///< Wrapped scroll position, but not clamped
879 Vector2 mScrollPostPosition; ///< Wrapped and clamped, this is the final scroll position used
880 Vector2 mScrollTargetPosition; ///< Final target position for an animated scroll
881 Vector2 mDomainOffset; ///< Domain offset (this keeps track of the domain boundaries that scroll positions traverses)
883 // Rulers for each axes...
887 // Last property values set to ScrollView
891 Animation mInternalXAnimation; ///< Animates mPropertyX to a snap position or application requested scroll position
892 Animation mInternalYAnimation; ///< Animates mPropertyY to a snap position or application requested scroll position
895 Vector2 mLastVelocity; ///< Record the last velocity from PanGesture (Finish event doesn't have correct velocity)
898 Timer mTouchDownTimer; ///< Used to interrupt snap-animation. This cannot be done in OnTouch without breaking fast flick behavior.
900 float mScrollUpdateDistance; ///< Distance for scrolling to travel for the scroll update notifications
901 Dali::PropertyNotification mScrollXUpdateNotification; ///< scroll x position update notification
902 Dali::PropertyNotification mScrollYUpdateNotification; ///< scroll y position update notification
904 Actor mInternalActor; ///< Internal actor (we keep internal actors in here e.g. scrollbars, so we can ignore it in searches)
906 ScrollViewEffectContainer mEffects; ///< Container keeping track of all the applied effects.
908 Vector2 mMaxOvershoot; ///< Number of scrollable pixels that will take overshoot from 0.0f to 1.0f
909 Vector2 mUserMaxOvershoot; ///< Set by user, allows overriding of default max overshoot for the scroll indicator
910 float mSnapOvershootDuration; ///< Duration for overshoot snapping back to Vector2::ZERO
911 AlphaFunction mSnapOvershootAlphaFunction; ///< AlphaFunction to be used for this overshoot.
913 float mSnapDuration; ///< Time for the snap animation to take (in seconds).
914 AlphaFunction mSnapAlphaFunction; ///< AlphaFunction to be used for the Snap Animation.
916 Vector2 mMinFlickDistance; ///< Minimum pan distance required for a flick
917 float mFlickSpeedThreshold; ///< Minimum pan speed required for a flick in pixels/ms
918 float mFlickDuration; ///< Time for the flick animation to take (in seconds).
919 AlphaFunction mFlickAlphaFunction; ///< AlphaFunction to be used for the Flick Animation.
921 float mAxisAutoLockGradient; ///< Axis Auto-lock gradient threshold. Above this gradient and it will lock scrolling to closest axis.
922 float mFrictionCoefficient; ///< Friction coefficient. Amount of friction to apply to free panning flick animation. in stage.lengths/sec
923 float mFlickSpeedCoefficient; ///< Flick velocity coefficient. Input touch velocity is multiplied by this.
924 float mMaxFlickSpeed; ///< Maximum flick speed. Maximum speed of flick in stage.lengths/sec.
926 Vector2 mWheelScrollDistanceStep; ///< The step of scroll distance in actor coordinates in X and Y axes for each wheel event received.
928 //ScrollInternalConstraintsPtr mScrollInternalConstraints;
929 Constraint mScrollMainInternalPrePositionConstraint;
930 Constraint mScrollMainInternalPositionConstraint;
931 Constraint mScrollMainInternalOvershootXConstraint;
932 Constraint mScrollMainInternalOvershootYConstraint;
933 Constraint mScrollMainInternalDeltaConstraint;
934 Constraint mScrollMainInternalFinalConstraint;
935 Constraint mScrollMainInternalRelativeConstraint;
936 Constraint mScrollMainInternalDomainConstraint;
937 Constraint mScrollMainInternalPrePositionMaxConstraint;
939 ScrollOvershootIndicatorPtr mOvershootIndicator;
941 Toolkit::ScrollView::SnapStartedSignalType mSnapStartedSignal;
943 bool mInAccessibilityPan:1; ///< With AccessibilityPan its easier to move between snap positions
944 bool mScrolling:1; ///< Flag indicating whether the scroll view is being scrolled (by user or animation)
945 bool mScrollInterrupted:1; ///< Flag set for when a down event interrupts a scroll
946 bool mPanning:1; ///< Whether scroll view is currently panning or not
947 bool mSensitive:1; ///< Scroll Sensitivity Flag.
948 bool mTouchDownTimeoutReached:1; ///< Indicates when down event timeout occured without corresponding up event (touch still down)
949 bool mActorAutoSnapEnabled:1; ///< Whether to automatically snap to closest actor.
950 bool mAutoResizeContainerEnabled:1; ///< Whether to automatically resize container (affects RulerDomain's on X/Y axes)
951 bool mWrapMode:1; ///< Whether to wrap contents based on container size.
952 bool mAxisAutoLock:1; ///< Whether to automatically lock axis when panning.
953 bool mAlterChild:1; ///< Internal flag to control behavior of OnChildAdd/OnChildRemove when Adding internal Actors.
954 bool mDefaultMaxOvershoot:1; ///< Whether to use default max overshoot or application defined one
955 bool mCanScrollHorizontal:1; ///< Local value of our property to check against
956 bool mCanScrollVertical:1; ///< Local value of our property to check against
959 } // namespace Internal
961 // Helpers for public-api forwarding methods
963 inline Toolkit::Internal::ScrollView& GetImpl(Toolkit::ScrollView& scrollView)
965 DALI_ASSERT_ALWAYS(scrollView);
967 Dali::RefObject& handle = scrollView.GetImplementation();
969 return static_cast<Toolkit::Internal::ScrollView&>(handle);
972 inline const Toolkit::Internal::ScrollView& GetImpl(const Toolkit::ScrollView& scrollView)
974 DALI_ASSERT_ALWAYS(scrollView);
976 const Dali::RefObject& handle = scrollView.GetImplementation();
978 return static_cast<const Toolkit::Internal::ScrollView&>(handle);
981 } // namespace Toolkit
985 #endif // __DALI_TOOLKIT_INTERNAL_SCROLL_VIEW_H__