1 #ifndef DALI_TOOLKIT_CONTROL_IMPL_H
2 #define DALI_TOOLKIT_CONTROL_IMPL_H
5 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/devel-api/adaptor-framework/accessibility.h>
23 #include <dali/integration-api/debug.h>
24 #include <dali/public-api/adaptor-framework/style-change.h>
25 #include <dali/public-api/events/long-press-gesture.h>
26 #include <dali/public-api/events/pan-gesture.h>
27 #include <dali/public-api/events/pinch-gesture.h>
28 #include <dali/public-api/events/tap-gesture.h>
29 #include <dali/public-api/object/property-index-ranges.h>
30 #include <dali/public-api/object/type-info.h>
33 #include <dali-toolkit/public-api/controls/control.h>
45 * @addtogroup dali_toolkit_controls
55 * @brief This is the internal base class for all controls.
57 * It will provide some common functionality required by all controls.
58 * Implements ConnectionTrackerInterface so that signals (typically connected to member functions) will
59 * be disconnected automatically when the control is destroyed.
62 class DALI_IMPORT_API Control : public CustomActorImpl, public ConnectionTrackerInterface
66 class Extension; ///< Forward declare future extension interface
68 // Creation & Destruction
71 * @brief Creates a new ControlImpl instance that does not require touch by default.
73 * If touch is required, then the user can connect to this class' touch signal.
75 * @return A handle to the ControlImpl instance
77 static Toolkit::Control New();
81 * @brief Virtual destructor.
90 * @copydoc Dali::Toolkit::Control::SetStyleName
92 void SetStyleName( const std::string& styleName );
95 * @copydoc Dali::Toolkit::Control::GetStyleName
97 const std::string& GetStyleName() const;
102 * @copydoc Dali::Toolkit::Control::SetBackgroundColor
104 void SetBackgroundColor( const Vector4& color );
107 * @copydoc Dali::Toolkit::Control::GetBackgroundColor
109 Vector4 GetBackgroundColor() const;
112 * @copydoc Dali::Toolkit::Control::SetBackgroundImage
114 void SetBackgroundImage( Image image );
117 * @brief Sets the background with a property map.
120 * @param[in] map The background property map
122 void SetBackground(const Property::Map& map);
125 * @copydoc Dali::Toolkit::Control::ClearBackground
127 void ClearBackground();
132 * @brief Allows deriving classes to enable any of the gesture detectors that are available.
134 * Gesture detection can be enabled one at a time or in bitwise format as shown:
136 * EnableGestureDetection(Gesture::Type(Gesture::Pinch | Gesture::Tap | Gesture::Pan));
139 * @param[in] type The gesture type(s) to enable
141 void EnableGestureDetection( Gesture::Type type );
144 * @brief Allows deriving classes to disable any of the gesture detectors.
146 * Like EnableGestureDetection, this can also be called using bitwise or.
148 * @param[in] type The gesture type(s) to disable
149 * @see EnableGetureDetection
151 void DisableGestureDetection( Gesture::Type type );
154 * @brief If deriving classes wish to fine tune pinch gesture
155 * detection, then they can access the gesture detector through this
156 * API and modify the detection.
159 * @return The pinch gesture detector
160 * @pre Pinch detection should have been enabled via EnableGestureDetection().
161 * @see EnableGestureDetection
163 PinchGestureDetector GetPinchGestureDetector() const;
166 * @brief If deriving classes wish to fine tune pan gesture
167 * detection, then they can access the gesture detector through this
168 * API and modify the detection.
171 * @return The pan gesture detector
172 * @pre Pan detection should have been enabled via EnableGestureDetection().
173 * @see EnableGestureDetection
175 PanGestureDetector GetPanGestureDetector() const;
178 * @brief If deriving classes wish to fine tune tap gesture
179 * detection, then they can access the gesture detector through this
180 * API and modify the detection.
183 * @return The tap gesture detector
184 * @pre Tap detection should have been enabled via EnableGestureDetection().
185 * @see EnableGestureDetection
187 TapGestureDetector GetTapGestureDetector() const;
190 * @brief If deriving classes wish to fine tune long press gesture
191 * detection, then they can access the gesture detector through this
192 * API and modify the detection.
195 * @return The long press gesture detector
196 * @pre Long press detection should have been enabled via EnableGestureDetection().
197 * @see EnableGestureDetection
199 LongPressGestureDetector GetLongPressGestureDetector() const;
201 // Keyboard Navigation
204 * @brief Sets whether this control supports two dimensional
205 * keyboard navigation (i.e. whether it knows how to handle the
206 * keyboard focus movement between its child actors).
208 * The control doesn't support it by default.
210 * @param[in] isSupported Whether this control supports two dimensional keyboard navigation
212 void SetKeyboardNavigationSupport( bool isSupported );
215 * @brief Gets whether this control supports two dimensional keyboard navigation.
218 * @return true if this control supports two dimensional keyboard navigation
220 bool IsKeyboardNavigationSupported();
225 * @copydoc Toolkit::Control::SetKeyInputFocus()
227 void SetKeyInputFocus();
230 * @copydoc Toolkit::Control::HasKeyInputFocus()
232 bool HasKeyInputFocus();
235 * @copydoc Toolkit::Control::ClearKeyInputFocus()
237 void ClearKeyInputFocus();
242 * @brief Sets whether this control is a focus group for keyboard navigation.
244 * (i.e. the scope of keyboard focus movement
245 * can be limited to its child actors). The control is not a focus group by default.
247 * @param[in] isFocusGroup Whether this control is set as a focus group for keyboard navigation
249 void SetAsKeyboardFocusGroup( bool isFocusGroup );
252 * @brief Gets whether this control is a focus group for keyboard navigation.
255 * @return true if this control is set as a focus group for keyboard navigation
257 bool IsKeyboardFocusGroup();
261 * @brief Called by the AccessibilityManager to activate the Control.
264 DALI_INTERNAL void AccessibilityActivate();
267 * @brief Called by the KeyboardFocusManager.
270 DALI_INTERNAL void KeyboardEnter();
276 * @copydoc Dali::Toolkit::Control::KeyEventSignal()
278 Toolkit::Control::KeyEventSignalType& KeyEventSignal();
281 * @copydoc Dali::Toolkit::Control::KeyInputFocusGainedSignal()
283 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusGainedSignal();
286 * @copydoc Dali::Toolkit::Control::KeyInputFocusLostSignal()
288 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusLostSignal();
292 * @brief Called by the KeyInputFocusManager to emit key event signals.
295 * @param[in] event The key event
296 * @return True if the event was consumed
298 DALI_INTERNAL bool EmitKeyEventSignal( const KeyEvent& event );
301 protected: // For derived classes to call
304 * @brief Emits KeyInputFocusGained signal if true else emits KeyInputFocusLost signal.
306 * Should be called last by the control after it acts on the Input Focus change.
309 * @param[in] focusGained True if gained, False if lost
311 void EmitKeyInputFocusSignal( bool focusGained );
313 protected: // From CustomActorImpl, not to be used by application developers
316 * @copydoc CustomActorImpl::OnStageConnection()
317 * @note If overridden, then an up-call to Control::OnStageConnection MUST be made at the end.
319 virtual void OnStageConnection( int depth );
322 * @copydoc CustomActorImpl::OnStageDisconnection()
323 * @note If overridden, then an up-call to Control::OnStageDisconnection MUST be made at the end.
325 virtual void OnStageDisconnection();
328 * @copydoc CustomActorImpl::OnChildAdd()
329 * @note If overridden, then an up-call to Control::OnChildAdd MUST be made at the end.
331 virtual void OnChildAdd( Actor& child );
334 * @copydoc CustomActorImpl::OnChildRemove()
335 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
337 virtual void OnChildRemove( Actor& child );
340 * @copydoc CustomActorImpl::OnPropertySet()
341 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
343 virtual void OnPropertySet( Property::Index index, Property::Value propertyValue );
346 * @copydoc CustomActorImpl::OnSizeSet()
347 * @note If overridden, then an up-call to Control::OnSizeSet MUST be made at the end.
349 virtual void OnSizeSet( const Vector3& targetSize );
352 * @copydoc CustomActorImpl::OnSizeAnimation()
353 * @note If overridden, then an up-call to Control::OnSizeAnimation MUST be made at the end.
355 virtual void OnSizeAnimation( Animation& animation, const Vector3& targetSize );
358 * @copydoc CustomActorImpl::OnTouchEvent()
360 virtual bool OnTouchEvent( const TouchEvent& event );
363 * @copydoc CustomActorImpl::OnHoverEvent()
365 virtual bool OnHoverEvent( const HoverEvent& event );
368 * @copydoc CustomActorImpl::OnKeyEvent()
370 virtual bool OnKeyEvent( const KeyEvent& event );
373 * @copydoc CustomActorImpl::OnWheelEvent()
375 virtual bool OnWheelEvent( const WheelEvent& event );
378 * @copydoc CustomActorImpl::OnRelayout()
380 virtual void OnRelayout( const Vector2& size, RelayoutContainer& container );
383 * @copydoc CustomActorImpl::OnSetResizePolicy()
385 virtual void OnSetResizePolicy( ResizePolicy::Type policy, Dimension::Type dimension );
388 * @copydoc CustomActorImpl::GetNaturalSize()
390 virtual Vector3 GetNaturalSize();
393 * @copydoc CustomActorImpl::CalculateChildSize()
395 virtual float CalculateChildSize( const Dali::Actor& child, Dimension::Type dimension );
398 * @copydoc CustomActorImpl::GetHeightForWidth()
400 virtual float GetHeightForWidth( float width );
403 * @copydoc CustomActorImpl::GetWidthForHeight()
405 virtual float GetWidthForHeight( float height );
408 * @copydoc CustomActorImpl::RelayoutDependentOnChildren()
410 virtual bool RelayoutDependentOnChildren( Dimension::Type dimension = Dimension::ALL_DIMENSIONS );
413 * @copydoc CustomActorImpl::OnCalculateRelayoutSize()
415 virtual void OnCalculateRelayoutSize( Dimension::Type dimension );
418 * @copydoc CustomActorImpl::OnLayoutNegotiated()
420 virtual void OnLayoutNegotiated( float size, Dimension::Type dimension );
422 protected: // Helpers for deriving classes
427 * @brief Flags for the constructor.
430 enum ControlBehaviour
432 CONTROL_BEHAVIOUR_DEFAULT = 0, ///< Default behaviour: Size negotiation is enabled & listens to Style Change signal, but doesn't receive event callbacks. @SINCE_1_2_10
433 REQUIRES_STYLE_CHANGE_SIGNALS = 1 << ( CustomActorImpl::ACTOR_FLAG_COUNT + 0 ), ///< True if needs to monitor style change signals such as theme/font change @SINCE_1_0.0 @DEPRECATED_1_2_10
434 REQUIRES_KEYBOARD_NAVIGATION_SUPPORT = 1 << ( CustomActorImpl::ACTOR_FLAG_COUNT + 1 ), ///< True if needs to support keyboard navigation @SINCE_1_0.0
436 DISABLE_STYLE_CHANGE_SIGNALS = 1 << ( CustomActorImpl::ACTOR_FLAG_COUNT + 2 ), ///< True if control should not monitor style change signals @SINCE_1_2_10
438 LAST_CONTROL_BEHAVIOUR_FLAG
441 static const int CONTROL_BEHAVIOUR_FLAG_COUNT = Log< LAST_CONTROL_BEHAVIOUR_FLAG - 1 >::value + 1; ///< Total count of flags
444 * @brief Control constructor.
447 * @param[in] behaviourFlags Behavioural flags from ControlBehaviour enum
449 Control( ControlBehaviour behaviourFlags );
452 * @brief Second phase initialization.
457 public: // API for derived classes to override
462 * @brief This method is called after the Control has been initialized.
464 * Derived classes should do any second phase initialization by overriding this method.
467 virtual void OnInitialize();
470 * @DEPRECATED_1_1.30. Override OnChildAdd instead.
472 * @brief Called whenever an Actor is added to the control.
474 * Could be overridden by derived classes.
477 * @param[in] child The added actor
479 virtual void OnControlChildAdd( Actor& child ) DALI_DEPRECATED_API;
482 * @DEPRECATED_1_1.30. Override OnChildRemove instead.
484 * @brief Called whenever an Actor is removed from the control.
486 * Could be overridden by derived classes.
489 * @param[in] child The removed actor
491 virtual void OnControlChildRemove( Actor& child ) DALI_DEPRECATED_API;
496 * @brief This method should be overridden by deriving classes requiring notifications when the style changes.
499 * @param[in] styleManager The StyleManager object
500 * @param[in] change Information denoting what has changed
502 virtual void OnStyleChange( Toolkit::StyleManager styleManager, StyleChange::Type change );
507 * @brief This method is called when the control is accessibility activated.
509 * Derived classes should override this to perform custom accessibility activation.
511 * @return true if this control can perform accessibility activation
513 virtual bool OnAccessibilityActivated();
516 * @brief This method should be overridden by deriving classes when they wish to respond the accessibility
520 * @param[in] gesture The pan gesture
521 * @return true if the pan gesture has been consumed by this control
523 virtual bool OnAccessibilityPan( PanGesture gesture );
526 * @brief This method should be overridden by deriving classes when they wish to respond the accessibility
530 * @param[in] touchEvent The touch event
531 * @return true if the touch event has been consumed by this control
533 virtual bool OnAccessibilityTouch( const TouchEvent& touchEvent );
536 * @brief This method should be overridden by deriving classes when they wish to respond
537 * the accessibility up and down action (i.e. value change of slider control).
540 * @param[in] isIncrease Whether the value should be increased or decreased
541 * @return true if the value changed action has been consumed by this control
543 virtual bool OnAccessibilityValueChange( bool isIncrease );
546 * @brief This method should be overridden by deriving classes when they wish to respond
547 * the accessibility zoom action.
550 * @return true if the zoom action has been consumed by this control
552 virtual bool OnAccessibilityZoom();
557 * @brief Called when the control gains key input focus.
559 * Should be overridden by derived classes if they need to customize what happens when focus is gained.
562 virtual void OnKeyInputFocusGained();
565 * @brief Called when the control loses key input focus.
567 * Should be overridden by derived classes if they need to customize what happens when focus is lost.
570 virtual void OnKeyInputFocusLost();
573 * @brief Gets the next keyboard focusable actor in this control towards the given direction.
575 * A control needs to override this function in order to support two dimensional keyboard navigation.
577 * @param[in] currentFocusedActor The current focused actor
578 * @param[in] direction The direction to move the focus towards
579 * @param[in] loopEnabled Whether the focus movement should be looped within the control
580 * @return The next keyboard focusable actor in this control or an empty handle if no actor can be focused
582 virtual Actor GetNextKeyboardFocusableActor( Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled );
585 * @brief Informs this control that its chosen focusable actor will be focused.
587 * This allows the application to perform any actions if wishes
588 * before the focus is actually moved to the chosen actor.
591 * @param[in] commitedFocusableActor The commited focusable actor
593 virtual void OnKeyboardFocusChangeCommitted( Actor commitedFocusableActor );
596 * @brief This method is called when the control has enter pressed on it.
598 * Derived classes should override this to perform custom actions.
600 * @return true if this control supported this action
602 virtual bool OnKeyboardEnter();
607 * @brief Called whenever a pinch gesture is detected on this control.
609 * This can be overridden by deriving classes when pinch detection
610 * is enabled. The default behaviour is to scale the control by the
614 * @param[in] pinch The pinch gesture
615 * @note If overridden, then the default behavior will not occur.
616 * @note Pinch detection should be enabled via EnableGestureDetection().
617 * @see EnableGestureDetection
619 virtual void OnPinch( const PinchGesture& pinch );
622 * @brief Called whenever a pan gesture is detected on this control.
624 * This should be overridden by deriving classes when pan detection
628 * @param[in] pan The pan gesture
629 * @note There is no default behavior with panning.
630 * @note Pan detection should be enabled via EnableGestureDetection().
631 * @see EnableGestureDetection
633 virtual void OnPan( const PanGesture& pan );
636 * @brief Called whenever a tap gesture is detected on this control.
638 * This should be overridden by deriving classes when tap detection
642 * @param[in] tap The tap gesture
643 * @note There is no default behavior with a tap.
644 * @note Tap detection should be enabled via EnableGestureDetection().
645 * @see EnableGestureDetection
647 virtual void OnTap( const TapGesture& tap );
650 * @brief Called whenever a long press gesture is detected on this control.
652 * This should be overridden by deriving classes when long press
653 * detection is enabled.
656 * @param[in] longPress The long press gesture
657 * @note There is no default behaviour associated with a long press.
658 * @note Long press detection should be enabled via EnableGestureDetection().
659 * @see EnableGestureDetection
661 virtual void OnLongPress( const LongPressGesture& longPress );
663 // From ConnectionTrackerInterface
666 * @copydoc ConnectionTrackerInterface::SignalConnected
668 virtual void SignalConnected( SlotObserver* slotObserver, CallbackBase* callback );
671 * @copydoc ConnectionTrackerInterface::SignalDisconnected
673 virtual void SignalDisconnected( SlotObserver* slotObserver, CallbackBase* callback );
676 * @brief Retrieves the extension for this control.
679 * @return The extension if available, NULL otherwise
681 virtual Extension* GetControlExtension()
690 DALI_INTERNAL Control( const Control& );
691 DALI_INTERNAL Control& operator=( const Control& );
694 class Impl; // Class declaration is public so we can internally add devel API's to the Controls Impl
700 void SetAccessibilityConstructor(std::function<std::unique_ptr<Dali::Accessibility::Accessible>(Dali::Actor)> constructor);
701 static Dali::Accessibility::Accessible *GetAccessibilityObject(Dali::Actor actor);
702 Toolkit::Control::AccessibilityActivateSignalType &AccessibilityActivateSignal();
703 void AccessibilitySetAttribute( const std::string& key, const std::string value );
704 std::string AccessibilityGetAttribute( const std::string& key );
705 void AccessibilityEraseAttribute( std::string& key );
707 struct AccessibleImpl : public virtual Dali::Accessibility::Accessible, public virtual Dali::Accessibility::Component, public virtual Dali::Accessibility::Collection,
708 public virtual Dali::Accessibility::Action {
710 Dali::Accessibility::Role role;
711 bool modal = false, root = false;
713 AccessibleImpl( Dali::Actor self, Dali::Accessibility::Role role,
715 : self( self ), role( role ), modal( modal ) {}
717 std::string GetName() override;
718 std::string GetDescription() override;
719 Dali::Accessibility::Accessible* GetParent() override;
720 size_t GetChildCount() override;
721 Dali::Accessibility::Accessible* GetChildAtIndex( size_t index ) override;
722 size_t GetIndexInParent() override;
723 Dali::Accessibility::Role GetRole() override;
724 Dali::Accessibility::States GetStates() override;
725 Dali::Accessibility::Attributes GetAttributes() override;
726 Dali::Accessibility::Rectangle
727 GetExtents( Dali::Accessibility::CoordType ctype ) override;
728 Dali::Accessibility::ComponentLayer GetLayer() override;
729 int GetMdiZOrder() override;
730 bool GrabFocus() override;
731 double GetAlpha() override;
732 bool SetExtents( Dali::Accessibility::Rectangle rect,
733 Dali::Accessibility::CoordType ctype ) override;
734 bool GrabHighlight() override;
735 bool ClearHighlight() override;
736 int GetHighlightIndex() override;
738 std::string GetActionName( size_t index ) override;
739 std::string GetLocalizedActionName( size_t index ) override;
740 std::string GetActionDescription( size_t index ) override;
741 size_t GetActionCount() override;
742 std::string GetActionKeyBinding( size_t index ) override;
743 bool DoAction( size_t index ) override;
745 virtual Dali::Accessibility::States CalculateStates();
746 virtual bool CalculateIsVisible() const;
751 * @brief Gets implementation from the handle.
755 * @return Implementation
756 * @pre handle is initialized and points to a control
758 DALI_IMPORT_API Internal::Control& GetImplementation( Dali::Toolkit::Control& handle );
761 * @brief Gets implementation from the handle.
765 * @return Implementation
766 * @pre Handle is initialized and points to a control.
768 DALI_IMPORT_API const Internal::Control& GetImplementation( const Dali::Toolkit::Control& handle );
770 } // namespace Internal
775 } // namespace Toolkit
779 #endif // DALI_TOOLKIT_CONTROL_IMPL_H