1 #ifndef DALI_TOOLKIT_CONTROL_IMPL_H
2 #define DALI_TOOLKIT_CONTROL_IMPL_H
5 * Copyright (c) 2022 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/style-change.h>
23 #include <dali/public-api/animation/alpha-function.h>
24 #include <dali/public-api/animation/time-period.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>
40 * @addtogroup dali_toolkit_controls
46 namespace DevelControl
48 class ControlAccessible;
50 } // namespace DevelControl
56 * @brief This is the internal base class for all controls.
58 * It will provide some common functionality required by all controls.
59 * Implements ConnectionTrackerInterface so that signals (typically connected to member functions) will
60 * be disconnected automatically when the control is destroyed.
63 class DALI_TOOLKIT_API Control : public CustomActorImpl, public ConnectionTrackerInterface
66 class Extension; ///< Forward declare future extension interface
68 // Creation & Destruction
70 * @brief Creates a new ControlImpl instance that does not require touch by default.
72 * If touch is required, then the user can connect to this class' touch signal.
74 * @return A handle to the ControlImpl instance
76 static Toolkit::Control New();
80 * @brief Virtual destructor.
89 * @copydoc Dali::Toolkit::Control::SetStyleName
91 void SetStyleName(const std::string& styleName);
94 * @copydoc Dali::Toolkit::Control::GetStyleName
96 const std::string& GetStyleName() const;
101 * @copydoc Dali::Toolkit::Control::SetBackgroundColor
103 void SetBackgroundColor(const Vector4& color);
106 * @brief Sets the background with a property map.
109 * @param[in] map The background property map
111 void SetBackground(const Property::Map& map);
114 * @copydoc Dali::Toolkit::Control::ClearBackground
116 void ClearBackground();
121 * @brief Gets the Accessible object that represents this control.
123 * This method creates the Accessible object if necessary, so a non-null return is expected.
125 * @return The Accessible object
127 Toolkit::DevelControl::ControlAccessible* GetAccessibleObject();
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(GestureType::Value(GestureType::PINCH | GestureType::TAP | GestureType::PAN));
139 * @param[in] type The gesture type(s) to enable
141 void EnableGestureDetection(GestureType::Value 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(GestureType::Value 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();
277 * @copydoc Dali::Toolkit::Control::KeyEventSignal()
279 Toolkit::Control::KeyEventSignalType& KeyEventSignal();
282 * @copydoc Dali::Toolkit::Control::KeyInputFocusGainedSignal()
284 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusGainedSignal();
287 * @copydoc Dali::Toolkit::Control::KeyInputFocusLostSignal()
289 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusLostSignal();
293 * @brief Called by the KeyInputFocusManager to emit key event signals.
296 * @param[in] event The key event
297 * @return True if the event was consumed
299 DALI_INTERNAL bool EmitKeyEventSignal(const KeyEvent& event);
302 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
315 * @copydoc CustomActorImpl::OnSceneConnection()
316 * @note If overridden, then an up-call to Control::OnSceneConnection MUST be made at the end.
318 void OnSceneConnection(int depth) override;
321 * @copydoc CustomActorImpl::OnSceneDisconnection()
322 * @note If overridden, then an up-call to Control::OnSceneDisconnection MUST be made at the end.
324 void OnSceneDisconnection() override;
327 * @copydoc CustomActorImpl::OnChildAdd()
328 * @note If overridden, then an up-call to Control::OnChildAdd MUST be made at the end.
330 void OnChildAdd(Actor& child) override;
333 * @copydoc CustomActorImpl::OnChildRemove()
334 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
336 void OnChildRemove(Actor& child) override;
339 * @copydoc CustomActorImpl::OnPropertySet()
340 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
342 void OnPropertySet(Property::Index index, const Property::Value& propertyValue) override;
345 * @copydoc CustomActorImpl::OnSizeSet()
346 * @note If overridden, then an up-call to Control::OnSizeSet MUST be made at the end.
348 void OnSizeSet(const Vector3& targetSize) override;
351 * @copydoc CustomActorImpl::OnSizeAnimation()
352 * @note If overridden, then an up-call to Control::OnSizeAnimation MUST be made at the end.
354 void OnSizeAnimation(Animation& animation, const Vector3& targetSize) override;
357 * @copydoc CustomActorImpl::OnRelayout()
359 void OnRelayout(const Vector2& size, RelayoutContainer& container) override;
362 * @copydoc CustomActorImpl::OnSetResizePolicy()
364 void OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension) override;
367 * @copydoc CustomActorImpl::GetNaturalSize()
369 Vector3 GetNaturalSize() override;
372 * @copydoc CustomActorImpl::CalculateChildSize()
374 float CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension) override;
377 * @copydoc CustomActorImpl::GetHeightForWidth()
379 float GetHeightForWidth(float width) override;
382 * @copydoc CustomActorImpl::GetWidthForHeight()
384 float GetWidthForHeight(float height) override;
387 * @copydoc CustomActorImpl::RelayoutDependentOnChildren()
389 bool RelayoutDependentOnChildren(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) override;
392 * @copydoc CustomActorImpl::OnCalculateRelayoutSize()
394 void OnCalculateRelayoutSize(Dimension::Type dimension) override;
397 * @copydoc CustomActorImpl::OnLayoutNegotiated()
399 void OnLayoutNegotiated(float size, Dimension::Type dimension) override;
401 public: // Helpers for deriving classes
404 * @brief Flags for the constructor.
407 enum ControlBehaviour
409 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
410 NOT_IN_USE_1 = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 0),
411 REQUIRES_KEYBOARD_NAVIGATION_SUPPORT = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 1), ///< True if needs to support keyboard navigation @SINCE_1_0.0
412 DISABLE_STYLE_CHANGE_SIGNALS = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 2), ///< True if control should not monitor style change signals @SINCE_1_2_10
414 LAST_CONTROL_BEHAVIOUR_FLAG
417 static const int CONTROL_BEHAVIOUR_FLAG_COUNT = Log<LAST_CONTROL_BEHAVIOUR_FLAG - 1>::value + 1; ///< Total count of flags
420 * @brief Creates a new ControlImpl instance that does not require touch by default.
422 * If touch is required, then the user can connect to this class' touch signal.
424 * @param[in] additionalBehaviour Additional control behaviour.
425 * @return A handle to the ControlImpl instance
427 static Toolkit::Control New(ControlBehaviour additionalBehaviour);
433 * @brief Control constructor.
436 * @param[in] behaviourFlags Behavioural flags from ControlBehaviour enum
438 Control(ControlBehaviour behaviourFlags);
441 * @brief Second phase initialization.
446 public: // API for derived classes to override
450 * @brief This method is called after the Control has been initialized.
452 * Derived classes should do any second phase initialization by overriding this method.
455 virtual void OnInitialize();
460 * @brief This method should be overridden by deriving classes requiring notifications when the style changes.
463 * @param[in] styleManager The StyleManager object
464 * @param[in] change Information denoting what has changed
466 virtual void OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change);
471 * @brief This method is called when the control is accessibility activated.
473 * Derived classes should override this to perform custom accessibility activation.
475 * @return true if this control can perform accessibility activation
477 virtual bool OnAccessibilityActivated();
480 * @brief This method should be overridden by deriving classes when they wish to respond the accessibility
484 * @param[in] gesture The pan gesture
485 * @return true if the pan gesture has been consumed by this control
487 virtual bool OnAccessibilityPan(PanGesture gesture);
490 * @brief This method should be overridden by deriving classes when they wish to respond
491 * the accessibility up and down action (i.e. value change of slider control).
494 * @param[in] isIncrease Whether the value should be increased or decreased
495 * @return true if the value changed action has been consumed by this control
497 virtual bool OnAccessibilityValueChange(bool isIncrease);
500 * @brief This method should be overridden by deriving classes when they wish to respond
501 * the accessibility zoom action.
504 * @return true if the zoom action has been consumed by this control
506 virtual bool OnAccessibilityZoom();
511 * @brief Called when the control gains key input focus.
513 * Should be overridden by derived classes if they need to customize what happens when focus is gained.
516 virtual void OnKeyInputFocusGained();
519 * @brief Called when the control loses key input focus.
521 * Should be overridden by derived classes if they need to customize what happens when focus is lost.
524 virtual void OnKeyInputFocusLost();
527 * @brief Gets the next keyboard focusable actor in this control towards the given direction.
529 * A control needs to override this function in order to support two dimensional keyboard navigation.
531 * @param[in] currentFocusedActor The current focused actor
532 * @param[in] direction The direction to move the focus towards
533 * @param[in] loopEnabled Whether the focus movement should be looped within the control
534 * @return The next keyboard focusable actor in this control or an empty handle if no actor can be focused
536 virtual Actor GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled);
539 * @brief Informs this control that its chosen focusable actor will be focused.
541 * This allows the application to perform any actions if wishes
542 * before the focus is actually moved to the chosen actor.
545 * @param[in] commitedFocusableActor The commited focusable actor
547 virtual void OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor);
550 * @brief This method is called when the control has enter pressed on it.
552 * Derived classes should override this to perform custom actions.
554 * @return true if this control supported this action
556 virtual bool OnKeyboardEnter();
559 * @brief Called after a key-event is received by the actor that has had its focus set.
562 * @param[in] event The Key Event
563 * @return True if the event should be consumed
565 virtual bool OnKeyEvent(const KeyEvent& event);
570 * @brief Called whenever a pinch gesture is detected on this control.
572 * This can be overridden by deriving classes when pinch detection
573 * is enabled. The default behaviour is to scale the control by the
577 * @param[in] pinch The pinch gesture
578 * @note If overridden, then the default behavior will not occur.
579 * @note Pinch detection should be enabled via EnableGestureDetection().
580 * @see EnableGestureDetection
582 virtual void OnPinch(const PinchGesture& pinch);
585 * @brief Called whenever a pan gesture is detected on this control.
587 * This should be overridden by deriving classes when pan detection
591 * @param[in] pan The pan gesture
592 * @note There is no default behavior with panning.
593 * @note Pan detection should be enabled via EnableGestureDetection().
594 * @see EnableGestureDetection
596 virtual void OnPan(const PanGesture& pan);
599 * @brief Called whenever a tap gesture is detected on this control.
601 * This should be overridden by deriving classes when tap detection
605 * @param[in] tap The tap gesture
606 * @note There is no default behavior with a tap.
607 * @note Tap detection should be enabled via EnableGestureDetection().
608 * @see EnableGestureDetection
610 virtual void OnTap(const TapGesture& tap);
613 * @brief Called whenever a long press gesture is detected on this control.
615 * This should be overridden by deriving classes when long press
616 * detection is enabled.
619 * @param[in] longPress The long press gesture
620 * @note There is no default behaviour associated with a long press.
621 * @note Long press detection should be enabled via EnableGestureDetection().
622 * @see EnableGestureDetection
624 virtual void OnLongPress(const LongPressGesture& longPress);
626 // From ConnectionTrackerInterface
629 * @copydoc ConnectionTrackerInterface::SignalConnected
631 void SignalConnected(SlotObserver* slotObserver, CallbackBase* callback) override;
634 * @copydoc ConnectionTrackerInterface::SignalDisconnected
636 void SignalDisconnected(SlotObserver* slotObserver, CallbackBase* callback) override;
639 * @brief Retrieves the extension for this control.
642 * @return The extension if available, NULL otherwise
644 virtual Extension* GetControlExtension()
652 * @brief Make visual transition from source control to destination control about specific Visual.
653 * If both of source and destination control have same visual index, than generates information for the transition of this Control.
655 * @param[out] sourcePropertyMap Source property map to be applied on this Control.
656 * @param[out] destinationPropertyMap Destination property map to be applied on this Control.
657 * @param[in] source Source control of the animation.
658 * @param[in] destination Destination control of the animation.
659 * @param[in] visualIndex Property::Index to make animation.
661 void MakeVisualTransition(Dali::Property::Map& sourcePropertyMap, Dali::Property::Map& destinationPropertyMap,
662 Dali::Toolkit::Control source, Dali::Toolkit::Control destination, Dali::Property::Index visualIndex);
665 * @brief Retrieves source and destination visual properties for the Transition of this Control.
666 * The properties of this Control will be transitioned from the propeties of source Control to that of destination control.
667 * If a property value is different between source and destination Control,
668 * the property information of each Control will be included in sourceProperties and destinationProperties.
670 * @param[out] sourceProperties Source property list to be applied on this Control.
671 * @param[out] destinationProperties Destination property list to be applied on this Control.
672 * @param[in] source Source control of the animation.
673 * @param[in] destination Destination control of the animation.
675 * @note This method do not handle Actor properties.
676 * And the size and order of the sourceProperties and destinationProperties must be synchronized.
678 virtual void OnCreateTransitions(std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& sourceProperties,
679 std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& destinationProperties,
680 Dali::Toolkit::Control source,
681 Dali::Toolkit::Control destination)
686 * @brief Update visual properties.
687 * @param[in] properties Property list to be used to update visual properties of this Control.
689 virtual void OnUpdateVisualProperties(const std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& properties)
696 // Not copyable or movable
697 DALI_INTERNAL Control(const Control&) = delete; ///< Deleted copy constructor.
698 DALI_INTERNAL Control(Control&&) = delete; ///< Deleted move constructor.
699 DALI_INTERNAL Control& operator=(const Control&) = delete; ///< Deleted copy assignment operator.
700 DALI_INTERNAL Control& operator=(Control&&) = delete; ///< Deleted move assignment operator.
703 class DALI_INTERNAL Impl; // Class declaration is public so we can internally add devel API's to the Controls Impl
711 * @brief Gets implementation from the handle.
715 * @return Implementation
716 * @pre handle is initialized and points to a control
718 DALI_TOOLKIT_API Internal::Control& GetImplementation(Dali::Toolkit::Control& handle);
721 * @brief Gets implementation from the handle.
725 * @return Implementation
726 * @pre Handle is initialized and points to a control.
728 DALI_TOOLKIT_API const Internal::Control& GetImplementation(const Dali::Toolkit::Control& handle);
730 } // namespace Internal
735 } // namespace Toolkit
739 #endif // DALI_TOOLKIT_CONTROL_IMPL_H