1 #ifndef DALI_TOOLKIT_CONTROL_IMPL_H
2 #define DALI_TOOLKIT_CONTROL_IMPL_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.
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
49 * @brief This is the internal base class for all controls.
51 * It will provide some common functionality required by all controls.
52 * Implements ConnectionTrackerInterface so that signals (typically connected to member functions) will
53 * be disconnected automatically when the control is destroyed.
56 class DALI_TOOLKIT_API Control : public CustomActorImpl, public ConnectionTrackerInterface
59 class Extension; ///< Forward declare future extension interface
61 // Creation & Destruction
64 * @brief Creates a new ControlImpl instance that does not require touch by default.
66 * If touch is required, then the user can connect to this class' touch signal.
68 * @return A handle to the ControlImpl instance
70 static Toolkit::Control New();
74 * @brief Virtual destructor.
83 * @copydoc Dali::Toolkit::Control::SetStyleName
85 void SetStyleName(const std::string& styleName);
88 * @copydoc Dali::Toolkit::Control::GetStyleName
90 const std::string& GetStyleName() const;
95 * @copydoc Dali::Toolkit::Control::SetBackgroundColor
97 void SetBackgroundColor(const Vector4& color);
100 * @brief Sets the background with a property map.
103 * @param[in] map The background property map
105 void SetBackground(const Property::Map& map);
108 * @copydoc Dali::Toolkit::Control::ClearBackground
110 void ClearBackground();
115 * @brief Allows deriving classes to enable any of the gesture detectors that are available.
117 * Gesture detection can be enabled one at a time or in bitwise format as shown:
119 * EnableGestureDetection(GestureType::Value(GestureType::PINCH | GestureType::TAP | GestureType::PAN));
122 * @param[in] type The gesture type(s) to enable
124 void EnableGestureDetection(GestureType::Value type);
127 * @brief Allows deriving classes to disable any of the gesture detectors.
129 * Like EnableGestureDetection, this can also be called using bitwise or.
131 * @param[in] type The gesture type(s) to disable
132 * @see EnableGetureDetection
134 void DisableGestureDetection(GestureType::Value type);
137 * @brief If deriving classes wish to fine tune pinch gesture
138 * detection, then they can access the gesture detector through this
139 * API and modify the detection.
142 * @return The pinch gesture detector
143 * @pre Pinch detection should have been enabled via EnableGestureDetection().
144 * @see EnableGestureDetection
146 PinchGestureDetector GetPinchGestureDetector() const;
149 * @brief If deriving classes wish to fine tune pan gesture
150 * detection, then they can access the gesture detector through this
151 * API and modify the detection.
154 * @return The pan gesture detector
155 * @pre Pan detection should have been enabled via EnableGestureDetection().
156 * @see EnableGestureDetection
158 PanGestureDetector GetPanGestureDetector() const;
161 * @brief If deriving classes wish to fine tune tap gesture
162 * detection, then they can access the gesture detector through this
163 * API and modify the detection.
166 * @return The tap gesture detector
167 * @pre Tap detection should have been enabled via EnableGestureDetection().
168 * @see EnableGestureDetection
170 TapGestureDetector GetTapGestureDetector() const;
173 * @brief If deriving classes wish to fine tune long press gesture
174 * detection, then they can access the gesture detector through this
175 * API and modify the detection.
178 * @return The long press gesture detector
179 * @pre Long press detection should have been enabled via EnableGestureDetection().
180 * @see EnableGestureDetection
182 LongPressGestureDetector GetLongPressGestureDetector() const;
184 // Keyboard Navigation
187 * @brief Sets whether this control supports two dimensional
188 * keyboard navigation (i.e. whether it knows how to handle the
189 * keyboard focus movement between its child actors).
191 * The control doesn't support it by default.
193 * @param[in] isSupported Whether this control supports two dimensional keyboard navigation
195 void SetKeyboardNavigationSupport(bool isSupported);
198 * @brief Gets whether this control supports two dimensional keyboard navigation.
201 * @return true if this control supports two dimensional keyboard navigation
203 bool IsKeyboardNavigationSupported();
208 * @copydoc Toolkit::Control::SetKeyInputFocus()
210 void SetKeyInputFocus();
213 * @copydoc Toolkit::Control::HasKeyInputFocus()
215 bool HasKeyInputFocus();
218 * @copydoc Toolkit::Control::ClearKeyInputFocus()
220 void ClearKeyInputFocus();
225 * @brief Sets whether this control is a focus group for keyboard navigation.
227 * (i.e. the scope of keyboard focus movement
228 * can be limited to its child actors). The control is not a focus group by default.
230 * @param[in] isFocusGroup Whether this control is set as a focus group for keyboard navigation
232 void SetAsKeyboardFocusGroup(bool isFocusGroup);
235 * @brief Gets whether this control is a focus group for keyboard navigation.
238 * @return true if this control is set as a focus group for keyboard navigation
240 bool IsKeyboardFocusGroup();
244 * @brief Called by the AccessibilityManager to activate the Control.
247 DALI_INTERNAL void AccessibilityActivate();
250 * @brief Called by the KeyboardFocusManager.
253 DALI_INTERNAL void KeyboardEnter();
257 * @brief Retrieve visual property animations.
258 * This Control is a destination.
260 * @param[in] animation generated animation
261 * @param[in] source source control of the animation.
262 * @param[in] alphaFunction AlphaFunction of the animation
263 * @param[in] timePeriod TimePeriod of the animation
265 virtual void CreateTransitions(Dali::Animation& animation, Dali::Toolkit::Control source, AlphaFunction alphaFunction, TimePeriod timePeriod);
268 * @brief Set this Control is transparent or not without any affection on the child Actors.
270 void SetTransparent(bool transparent) override;
273 * @brief Get this Control is transparent or not.
275 bool GetTransparent() const override;
280 * @copydoc Dali::Toolkit::Control::KeyEventSignal()
282 Toolkit::Control::KeyEventSignalType& KeyEventSignal();
285 * @copydoc Dali::Toolkit::Control::KeyInputFocusGainedSignal()
287 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusGainedSignal();
290 * @copydoc Dali::Toolkit::Control::KeyInputFocusLostSignal()
292 Toolkit::Control::KeyInputFocusSignalType& KeyInputFocusLostSignal();
296 * @brief Called by the KeyInputFocusManager to emit key event signals.
299 * @param[in] event The key event
300 * @return True if the event was consumed
302 DALI_INTERNAL bool EmitKeyEventSignal(const KeyEvent& event);
305 private: // For utility method
306 void MakeVisualTransition(Dali::Animation& animation, Dali::Toolkit::Control source, Dali::Property::Index index, AlphaFunction alphaFunction, TimePeriod timePeriod);
308 protected: // For derived classes to call
310 * @brief Emits KeyInputFocusGained signal if true else emits KeyInputFocusLost signal.
312 * Should be called last by the control after it acts on the Input Focus change.
315 * @param[in] focusGained True if gained, False if lost
317 void EmitKeyInputFocusSignal(bool focusGained);
319 protected: // From CustomActorImpl
321 * @copydoc CustomActorImpl::OnSceneConnection()
322 * @note If overridden, then an up-call to Control::OnSceneConnection MUST be made at the end.
324 void OnSceneConnection(int depth) override;
327 * @copydoc CustomActorImpl::OnSceneDisconnection()
328 * @note If overridden, then an up-call to Control::OnSceneDisconnection MUST be made at the end.
330 void OnSceneDisconnection() override;
333 * @copydoc CustomActorImpl::OnChildAdd()
334 * @note If overridden, then an up-call to Control::OnChildAdd MUST be made at the end.
336 void OnChildAdd(Actor& child) override;
339 * @copydoc CustomActorImpl::OnChildRemove()
340 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
342 void OnChildRemove(Actor& child) override;
345 * @copydoc CustomActorImpl::OnPropertySet()
346 * @note If overridden, then an up-call to Control::OnChildRemove MUST be made at the end.
348 void OnPropertySet(Property::Index index, const Property::Value& propertyValue) override;
351 * @copydoc CustomActorImpl::OnSizeSet()
352 * @note If overridden, then an up-call to Control::OnSizeSet MUST be made at the end.
354 void OnSizeSet(const Vector3& targetSize) override;
357 * @copydoc CustomActorImpl::OnSizeAnimation()
358 * @note If overridden, then an up-call to Control::OnSizeAnimation MUST be made at the end.
360 void OnSizeAnimation(Animation& animation, const Vector3& targetSize) override;
363 * @copydoc CustomActorImpl::OnRelayout()
365 void OnRelayout(const Vector2& size, RelayoutContainer& container) override;
368 * @copydoc CustomActorImpl::OnSetResizePolicy()
370 void OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension) override;
373 * @copydoc CustomActorImpl::GetNaturalSize()
375 Vector3 GetNaturalSize() override;
378 * @copydoc CustomActorImpl::CalculateChildSize()
380 float CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension) override;
383 * @copydoc CustomActorImpl::GetHeightForWidth()
385 float GetHeightForWidth(float width) override;
388 * @copydoc CustomActorImpl::GetWidthForHeight()
390 float GetWidthForHeight(float height) override;
393 * @copydoc CustomActorImpl::RelayoutDependentOnChildren()
395 bool RelayoutDependentOnChildren(Dimension::Type dimension = Dimension::ALL_DIMENSIONS) override;
398 * @copydoc CustomActorImpl::OnCalculateRelayoutSize()
400 void OnCalculateRelayoutSize(Dimension::Type dimension) override;
403 * @copydoc CustomActorImpl::OnLayoutNegotiated()
405 void OnLayoutNegotiated(float size, Dimension::Type dimension) override;
407 protected: // Helpers for deriving classes
411 * @brief Flags for the constructor.
414 enum ControlBehaviour
416 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
417 NOT_IN_USE_1 = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 0),
418 REQUIRES_KEYBOARD_NAVIGATION_SUPPORT = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 1), ///< True if needs to support keyboard navigation @SINCE_1_0.0
419 DISABLE_STYLE_CHANGE_SIGNALS = 1 << (CustomActorImpl::ACTOR_FLAG_COUNT + 2), ///< True if control should not monitor style change signals @SINCE_1_2_10
421 LAST_CONTROL_BEHAVIOUR_FLAG
424 static const int CONTROL_BEHAVIOUR_FLAG_COUNT = Log<LAST_CONTROL_BEHAVIOUR_FLAG - 1>::value + 1; ///< Total count of flags
427 * @brief Control constructor.
430 * @param[in] behaviourFlags Behavioural flags from ControlBehaviour enum
432 Control(ControlBehaviour behaviourFlags);
435 * @brief Second phase initialization.
440 public: // API for derived classes to override
444 * @brief This method is called after the Control has been initialized.
446 * Derived classes should do any second phase initialization by overriding this method.
449 virtual void OnInitialize();
454 * @brief This method should be overridden by deriving classes requiring notifications when the style changes.
457 * @param[in] styleManager The StyleManager object
458 * @param[in] change Information denoting what has changed
460 virtual void OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change);
465 * @brief This method is called when the control is accessibility activated.
467 * Derived classes should override this to perform custom accessibility activation.
469 * @return true if this control can perform accessibility activation
471 virtual bool OnAccessibilityActivated();
474 * @brief This method should be overridden by deriving classes when they wish to respond the accessibility
478 * @param[in] gesture The pan gesture
479 * @return true if the pan gesture has been consumed by this control
481 virtual bool OnAccessibilityPan(PanGesture gesture);
484 * @brief This method should be overridden by deriving classes when they wish to respond
485 * the accessibility up and down action (i.e. value change of slider control).
488 * @param[in] isIncrease Whether the value should be increased or decreased
489 * @return true if the value changed action has been consumed by this control
491 virtual bool OnAccessibilityValueChange(bool isIncrease);
494 * @brief This method should be overridden by deriving classes when they wish to respond
495 * the accessibility zoom action.
498 * @return true if the zoom action has been consumed by this control
500 virtual bool OnAccessibilityZoom();
505 * @brief Called when the control gains key input focus.
507 * Should be overridden by derived classes if they need to customize what happens when focus is gained.
510 virtual void OnKeyInputFocusGained();
513 * @brief Called when the control loses key input focus.
515 * Should be overridden by derived classes if they need to customize what happens when focus is lost.
518 virtual void OnKeyInputFocusLost();
521 * @brief Gets the next keyboard focusable actor in this control towards the given direction.
523 * A control needs to override this function in order to support two dimensional keyboard navigation.
525 * @param[in] currentFocusedActor The current focused actor
526 * @param[in] direction The direction to move the focus towards
527 * @param[in] loopEnabled Whether the focus movement should be looped within the control
528 * @return The next keyboard focusable actor in this control or an empty handle if no actor can be focused
530 virtual Actor GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled);
533 * @brief Informs this control that its chosen focusable actor will be focused.
535 * This allows the application to perform any actions if wishes
536 * before the focus is actually moved to the chosen actor.
539 * @param[in] commitedFocusableActor The commited focusable actor
541 virtual void OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor);
544 * @brief This method is called when the control has enter pressed on it.
546 * Derived classes should override this to perform custom actions.
548 * @return true if this control supported this action
550 virtual bool OnKeyboardEnter();
553 * @brief Called after a key-event is received by the actor that has had its focus set.
556 * @param[in] event The Key Event
557 * @return True if the event should be consumed
559 virtual bool OnKeyEvent(const KeyEvent& event);
564 * @brief Called whenever a pinch gesture is detected on this control.
566 * This can be overridden by deriving classes when pinch detection
567 * is enabled. The default behaviour is to scale the control by the
571 * @param[in] pinch The pinch gesture
572 * @note If overridden, then the default behavior will not occur.
573 * @note Pinch detection should be enabled via EnableGestureDetection().
574 * @see EnableGestureDetection
576 virtual void OnPinch(const PinchGesture& pinch);
579 * @brief Called whenever a pan gesture is detected on this control.
581 * This should be overridden by deriving classes when pan detection
585 * @param[in] pan The pan gesture
586 * @note There is no default behavior with panning.
587 * @note Pan detection should be enabled via EnableGestureDetection().
588 * @see EnableGestureDetection
590 virtual void OnPan(const PanGesture& pan);
593 * @brief Called whenever a tap gesture is detected on this control.
595 * This should be overridden by deriving classes when tap detection
599 * @param[in] tap The tap gesture
600 * @note There is no default behavior with a tap.
601 * @note Tap detection should be enabled via EnableGestureDetection().
602 * @see EnableGestureDetection
604 virtual void OnTap(const TapGesture& tap);
607 * @brief Called whenever a long press gesture is detected on this control.
609 * This should be overridden by deriving classes when long press
610 * detection is enabled.
613 * @param[in] longPress The long press gesture
614 * @note There is no default behaviour associated with a long press.
615 * @note Long press detection should be enabled via EnableGestureDetection().
616 * @see EnableGestureDetection
618 virtual void OnLongPress(const LongPressGesture& longPress);
620 // From ConnectionTrackerInterface
623 * @copydoc ConnectionTrackerInterface::SignalConnected
625 void SignalConnected(SlotObserver* slotObserver, CallbackBase* callback) override;
628 * @copydoc ConnectionTrackerInterface::SignalDisconnected
630 void SignalDisconnected(SlotObserver* slotObserver, CallbackBase* callback) override;
633 * @brief Retrieves the extension for this control.
636 * @return The extension if available, NULL otherwise
638 virtual Extension* GetControlExtension()
646 // Not copyable or movable
647 DALI_INTERNAL Control(const Control&) = delete; ///< Deleted copy constructor.
648 DALI_INTERNAL Control(Control&&) = delete; ///< Deleted move constructor.
649 DALI_INTERNAL Control& operator=(const Control&) = delete; ///< Deleted copy assignment operator.
650 DALI_INTERNAL Control& operator=(Control&&) = delete; ///< Deleted move assignment operator.
653 class DALI_INTERNAL Impl; // Class declaration is public so we can internally add devel API's to the Controls Impl
661 * @brief Gets implementation from the handle.
665 * @return Implementation
666 * @pre handle is initialized and points to a control
668 DALI_TOOLKIT_API Internal::Control& GetImplementation(Dali::Toolkit::Control& handle);
671 * @brief Gets implementation from the handle.
675 * @return Implementation
676 * @pre Handle is initialized and points to a control.
678 DALI_TOOLKIT_API const Internal::Control& GetImplementation(const Dali::Toolkit::Control& handle);
680 } // namespace Internal
685 } // namespace Toolkit
689 #endif // DALI_TOOLKIT_CONTROL_IMPL_H