1 #ifndef DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H
2 #define DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H
5 * Copyright (c) 2020 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/object/base-object.h>
23 #include <dali/public-api/object/weak-handle.h>
24 #include <dali/public-api/common/vector-wrapper.h>
27 #include <dali-toolkit/public-api/focus-manager/keyboard-focus-manager.h>
28 #include <dali-toolkit/devel-api/focus-manager/keyboard-focus-manager-devel.h>
29 #include <dali/devel-api/adaptor-framework/window-devel.h>
39 } // namespace Integration
48 * @copydoc Toolkit::KeyboardFocusManager
50 class KeyboardFocusManager : public Dali::BaseObject, public ConnectionTracker
54 typedef Toolkit::DevelKeyboardFocusManager::CustomAlgorithmInterface CustomAlgorithmInterface;
56 enum FocusIndicatorState
58 UNKNOWN = -1, ///< Unknown state
59 HIDE = 0, ///< FocusIndicator is hidden
60 SHOW = 1, ///< FocusIndicator is shown
63 enum EnableFocusedIndicatorState
65 DISABLE = 0, ///< FocusIndicator is disable
66 ENABLE = 1, ///< FocusIndicator is enable
69 enum FocusedIndicatorModeState
71 NONE = 0, ///< Set nothing
72 ALWAYS_SHOW = 1, ///< FocusIndicator is always shown
76 * @copydoc Toolkit::KeyboardFocusManager::Get
78 static Toolkit::KeyboardFocusManager Get();
81 * Construct a new KeyboardFocusManager.
83 KeyboardFocusManager();
86 * @copydoc Toolkit::KeyboardFocusManager::SetCurrentFocusActor
88 bool SetCurrentFocusActor(Actor actor);
91 * @copydoc Toolkit::KeyboardFocusManager::GetCurrentFocusActor
93 Actor GetCurrentFocusActor();
96 * @copydoc Toolkit::KeyboardFocusManager::MoveFocus
98 bool MoveFocus(Toolkit::Control::KeyboardFocus::Direction direction);
101 * @copydoc Toolkit::KeyboardFocusManager::ClearFocus
106 * @copydoc Toolkit::KeyboardFocusManager::SetAsFocusGroup
108 void SetAsFocusGroup(Actor actor, bool isFocusGroup);
111 * @copydoc Toolkit::KeyboardFocusManager::IsFocusGroup
113 bool IsFocusGroup(Actor actor) const;
116 * @copydoc Toolkit::KeyboardFocusManager::GetFocusGroup
118 Actor GetFocusGroup(Actor actor);
121 * @copydoc Toolkit::KeyboardFocusManager::SetFocusGroupLoop
123 void SetFocusGroupLoop(bool enabled);
126 * @copydoc Toolkit::KeyboardFocusManager::GetFocusGroupLoop
128 bool GetFocusGroupLoop() const;
131 * @copydoc Toolkit::KeyboardFocusManager::SetFocusIndicatorActor
133 void SetFocusIndicatorActor(Actor indicator);
136 * @copydoc Toolkit::KeyboardFocusManager::GetFocusIndicatorActor
138 Actor GetFocusIndicatorActor();
141 * Move current focus to backward
143 void MoveFocusBackward();
146 * @copydoc Toolkit::DevelKeyboardFocusManager::SetCustomAlgorithm
148 void SetCustomAlgorithm(CustomAlgorithmInterface& interface);
151 * @copydoc Toolkit::DevelKeyboardFocusManager::UseFocusIndicator
153 void EnableFocusIndicator(bool enable);
156 * @copydoc Toolkit::DevelKeyboardFocusManager::UseFocusIndicator
158 bool IsFocusIndicatorEnabled() const;
161 * @copydoc Toolkit::DevelKeyboardFocusManager::EnableDefaultAlgorithm
163 void EnableDefaultAlgorithm(bool enable);
166 * @copydoc Toolkit::DevelKeyboardFocusManager::IsDefaultAlgorithmEnabled
168 bool IsDefaultAlgorithmEnabled() const;
173 * @copydoc Toolkit::KeyboardFocusManager::PreFocusChangeSignal()
175 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& PreFocusChangeSignal();
178 * @copydoc Toolkit::KeyboardFocusManager::FocusChangedSignal()
180 Toolkit::KeyboardFocusManager::FocusChangedSignalType& FocusChangedSignal();
183 * @copydoc Toolkit::KeyboardFocusManager::FocusGroupChangedSignal()
185 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& FocusGroupChangedSignal();
188 * @copydoc Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignal()
190 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& FocusedActorEnterKeySignal();
193 * Connects a callback function with the object's signals.
194 * @param[in] object The object providing the signal.
195 * @param[in] tracker Used to disconnect the signal.
196 * @param[in] signalName The signal to connect to.
197 * @param[in] functor A newly allocated FunctorDelegate.
198 * @return True if the signal was connected.
199 * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
201 static bool DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor );
208 virtual ~KeyboardFocusManager();
212 typedef std::vector< WeakHandle< Actor > > FocusStack; ///< Define Dali::Vector< Dali::BaseObject* > as FocusStack to contain focus history
213 typedef FocusStack::iterator FocusStackIterator; ///< Define FocusStack::Iterator as FocusStackIterator to navigate FocusStack
216 * This will be called when the adaptor is initialized
218 void OnAdaptorInit();
221 * This will be called when a new scene holder is created
222 * @param sceneHolder The new scene holder
224 void OnSceneHolderCreated( Dali::Integration::SceneHolder& sceneHolder );
227 * Get configuration from StyleManager.
229 void GetConfigurationFromStyleManger();
232 * Get the focus group of current focused actor.
233 * @pre The FocusManager has been initialized.
234 * @return A handle to the parent of the current focused actor which is a focus group,
235 * or an empty handle if no actor is focused.
237 Actor GetCurrentFocusGroup();
240 * Move the focus to the specified actor and send notification for the focus change.
241 * @param actor The actor to be queried
242 * @return Whether the focus is successful or not
244 bool DoSetCurrentFocusActor(Actor actor);
247 * Move the focus to the next actor towards the specified direction within the layout control
248 * @param control The layout control to move the focus in
249 * @param actor The current focused actor
250 * @param direction The direction of focus movement
251 * @return Whether the focus is successful or not
253 bool DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction);
256 * Move the focus to the first focusable actor in the next focus group in the forward
257 * or backward direction. The "Tab" key changes the focus group in the forward direction
258 * and the "Shift-Tab" key changes it in the backward direction.
259 * @param forward Whether the direction of focus group change is forward or backward
260 * @return Whether the focus group change is successful or not
262 bool DoMoveFocusToNextFocusGroup(bool forward);
265 * Enter has been pressed on the actor. If the actor is control, call the OnKeybaordEnter virtual function.
266 * This function will emit FocusedActorEnterKeySignal.
267 * @param actor The actor to notify
269 void DoKeyboardEnter( Actor actor );
272 * Check whether the actor is a layout control that supports two dimensional keyboard navigation.
273 * The layout control needs to internally set the focus order for the child actor and be able to
274 * tell KeyboardFocusmanager the next focusable actor in the given direction.
275 * @pre The KeyboardFocusManager has been initialized.
276 * @pre The Actor has been initialized.
277 * @param actor The actor to be checked.
278 * @return Whether the actor is a layout control or not.
280 bool IsLayoutControl(Actor actor) const;
283 * Returns the closest ancestor of the given actor that is a layout control.
284 * @param actor The actor to be checked for its parent layout control
285 * @return The parent layout control the given actor belongs to or an empty handle if the given actor doesn't belong to a layout control
287 Toolkit::Control GetParentLayoutControl(Actor actor) const;
290 * Callback for the key event when no actor in the stage has gained the key input focus
291 * @param[in] event The KeyEvent event.
293 void OnKeyEvent( const KeyEvent& event );
296 * Callback for the touch event when the screen is touched and when the touch ends
297 * (i.e. the down & up touch events only).
298 * @param[in] touch The touch information
300 void OnTouch( const TouchEvent& touch );
303 * Called when the window focus is changed.
304 * @param[in] window The window whose focus is changed
305 * @param[in] focusIn Whether the focus is in/out
307 void OnWindowFocusChanged( Window window, bool focusIn );
310 * Get the focus Actor from current window
312 Actor GetFocusActorFromCurrentWindow();
317 KeyboardFocusManager(const KeyboardFocusManager&);
319 KeyboardFocusManager& operator=(const KeyboardFocusManager& rhs);
323 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType mPreFocusChangeSignal; ///< The signal to notify the focus will be changed
324 Toolkit::KeyboardFocusManager::FocusChangedSignalType mFocusChangedSignal; ///< The signal to notify the focus change
325 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType mFocusGroupChangedSignal; ///< The signal to notify the focus group change
326 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType mFocusedActorEnterKeySignal; ///< The signal to notify that enter has been pressed on the focused actor
328 WeakHandle< Actor > mCurrentFocusActor; ///< A weak handle to the current focused actor
330 Actor mFocusIndicatorActor; ///< The focus indicator actor shared by all the keyboard focusable actors for highlight
332 FocusStack mFocusHistory; ///< Stack to contain pre-focused actor's BaseObject*
334 SlotDelegate< KeyboardFocusManager > mSlotDelegate;
336 CustomAlgorithmInterface* mCustomAlgorithmInterface; ///< The user's (application / toolkit) implementation of CustomAlgorithmInterface
338 typedef std::vector< std::pair< WeakHandle< Layer >, WeakHandle< Actor > > > FocusActorContainer;
340 FocusActorContainer mCurrentFocusActors; ///< A container of focused actors
342 WeakHandle< Layer > mCurrentFocusedWindow; ///< A weak handle to the current focused window's root layer
344 FocusIndicatorState mIsFocusIndicatorShown; ///< Whether indicator should be shown / hidden when getting focus. It could be enabled when keyboard focus feature is enabled and navigation keys or 'Tab' key are pressed.
346 EnableFocusedIndicatorState mEnableFocusIndicator; ///< Whether use focus indicator
348 FocusedIndicatorModeState mAlwaysShowIndicator; ///< Whether always show indicator. If true, the indicator would be directly shown when focused
350 bool mFocusGroupLoopEnabled:1; ///< Whether the focus movement is looped within the same focus group
352 bool mIsWaitingKeyboardFocusChangeCommit:1; /// A flag to indicate PreFocusChangeSignal emitted but the proposed focus actor is not commited by the application yet.
354 bool mClearFocusOnTouch:1; ///< Whether clear focus on touch.
356 bool mEnableDefaultAlgorithm : 1; ///< Whether use default algorithm focus
359 } // namespace Internal
361 inline Internal::KeyboardFocusManager& GetImpl(Dali::Toolkit::KeyboardFocusManager& obj)
363 DALI_ASSERT_ALWAYS(obj);
365 Dali::BaseObject& handle = obj.GetBaseObject();
367 return static_cast<Internal::KeyboardFocusManager&>(handle);
370 inline const Internal::KeyboardFocusManager& GetImpl(const Dali::Toolkit::KeyboardFocusManager& obj)
372 DALI_ASSERT_ALWAYS(obj);
374 const Dali::BaseObject& handle = obj.GetBaseObject();
376 return static_cast<const Internal::KeyboardFocusManager&>(handle);
379 } // namespace Toolkit
383 #endif // DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H