1 #ifndef DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H
2 #define DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H
5 * Copyright (c) 2019 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>
43 * @copydoc Toolkit::KeyboardFocusManager
45 class KeyboardFocusManager : public Dali::BaseObject, public ConnectionTracker
49 typedef Toolkit::DevelKeyboardFocusManager::CustomAlgorithmInterface CustomAlgorithmInterface;
51 enum FocusIndicatorState
53 UNKNOWN = -1, ///< Unknown state
54 HIDE = 0, ///< FocusIndicator is hidden
55 SHOW = 1, ///< FocusIndicator is shown
58 enum EnableFocusedIndicatorState
60 DISABLE = 0, ///< FocusIndicator is disable
61 ENABLE = 1, ///< FocusIndicator is enable
64 enum FocusedIndicatorModeState
66 NONE = 0, ///< Set nothing
67 ALWAYS_SHOW = 1, ///< FocusIndicator is always shown
71 * @copydoc Toolkit::KeyboardFocusManager::Get
73 static Toolkit::KeyboardFocusManager Get();
76 * Construct a new KeyboardFocusManager.
78 KeyboardFocusManager();
81 * @copydoc Toolkit::KeyboardFocusManager::SetCurrentFocusActor
83 bool SetCurrentFocusActor(Actor actor);
86 * @copydoc Toolkit::KeyboardFocusManager::GetCurrentFocusActor
88 Actor GetCurrentFocusActor();
91 * @copydoc Toolkit::KeyboardFocusManager::MoveFocus
93 bool MoveFocus(Toolkit::Control::KeyboardFocus::Direction direction);
96 * @copydoc Toolkit::KeyboardFocusManager::ClearFocus
101 * @copydoc Toolkit::KeyboardFocusManager::SetAsFocusGroup
103 void SetAsFocusGroup(Actor actor, bool isFocusGroup);
106 * @copydoc Toolkit::KeyboardFocusManager::IsFocusGroup
108 bool IsFocusGroup(Actor actor) const;
111 * @copydoc Toolkit::KeyboardFocusManager::GetFocusGroup
113 Actor GetFocusGroup(Actor actor);
116 * @copydoc Toolkit::KeyboardFocusManager::SetFocusGroupLoop
118 void SetFocusGroupLoop(bool enabled);
121 * @copydoc Toolkit::KeyboardFocusManager::GetFocusGroupLoop
123 bool GetFocusGroupLoop() const;
126 * @copydoc Toolkit::KeyboardFocusManager::SetFocusIndicatorActor
128 void SetFocusIndicatorActor(Actor indicator);
131 * @copydoc Toolkit::KeyboardFocusManager::GetFocusIndicatorActor
133 Actor GetFocusIndicatorActor();
136 * Move current focus to backward
138 void MoveFocusBackward();
141 * @copydoc Toolkit::DevelKeyboardFocusManager::SetCustomAlgorithm
143 void SetCustomAlgorithm(CustomAlgorithmInterface& interface);
146 * @copydoc Toolkit::DevelKeyboardFocusManager::UseFocusIndicator
148 void EnableFocusIndicator(bool enable);
151 * @copydoc Toolkit::DevelKeyboardFocusManager::UseFocusIndicator
153 bool IsFocusIndicatorEnabled() const;
158 * @copydoc Toolkit::KeyboardFocusManager::PreFocusChangeSignal()
160 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& PreFocusChangeSignal();
163 * @copydoc Toolkit::KeyboardFocusManager::FocusChangedSignal()
165 Toolkit::KeyboardFocusManager::FocusChangedSignalType& FocusChangedSignal();
168 * @copydoc Toolkit::KeyboardFocusManager::FocusGroupChangedSignal()
170 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& FocusGroupChangedSignal();
173 * @copydoc Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignal()
175 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& FocusedActorEnterKeySignal();
178 * Connects a callback function with the object's signals.
179 * @param[in] object The object providing the signal.
180 * @param[in] tracker Used to disconnect the signal.
181 * @param[in] signalName The signal to connect to.
182 * @param[in] functor A newly allocated FunctorDelegate.
183 * @return True if the signal was connected.
184 * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
186 static bool DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor );
193 virtual ~KeyboardFocusManager();
197 typedef std::vector< WeakHandle< Actor > > FocusStack; ///< Define Dali::Vector< Dali::BaseObject* > as FocusStack to contain focus history
198 typedef FocusStack::iterator FocusStackIterator; ///< Define FocusStack::Iterator as FocusStackIterator to navigate FocusStack
201 * This will be called when the adaptor is initialized
203 void OnAdaptorInit();
206 * This will be called when a new wndow is created
207 * @param window The new window
209 void OnWindowCreated( Dali::Window& window );
212 * Get configuration from StyleManager.
214 void GetConfigurationFromStyleManger();
217 * Get the focus group of current focused actor.
218 * @pre The FocusManager has been initialized.
219 * @return A handle to the parent of the current focused actor which is a focus group,
220 * or an empty handle if no actor is focused.
222 Actor GetCurrentFocusGroup();
225 * Move the focus to the specified actor and send notification for the focus change.
226 * @param actor The actor to be queried
227 * @return Whether the focus is successful or not
229 bool DoSetCurrentFocusActor(Actor actor);
232 * Move the focus to the next actor towards the specified direction within the layout control
233 * @param control The layout control to move the focus in
234 * @param actor The current focused actor
235 * @param direction The direction of focus movement
236 * @return Whether the focus is successful or not
238 bool DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction);
241 * Move the focus to the first focusable actor in the next focus group in the forward
242 * or backward direction. The "Tab" key changes the focus group in the forward direction
243 * and the "Shift-Tab" key changes it in the backward direction.
244 * @param forward Whether the direction of focus group change is forward or backward
245 * @return Whether the focus group change is successful or not
247 bool DoMoveFocusToNextFocusGroup(bool forward);
250 * Enter has been pressed on the actor. If the actor is control, call the OnKeybaordEnter virtual function.
251 * This function will emit FocusedActorEnterKeySignal.
252 * @param actor The actor to notify
254 void DoKeyboardEnter( Actor actor );
257 * Check whether the actor is a layout control that supports two dimensional keyboard navigation.
258 * The layout control needs to internally set the focus order for the child actor and be able to
259 * tell KeyboardFocusmanager the next focusable actor in the given direction.
260 * @pre The KeyboardFocusManager has been initialized.
261 * @pre The Actor has been initialized.
262 * @param actor The actor to be checked.
263 * @return Whether the actor is a layout control or not.
265 bool IsLayoutControl(Actor actor) const;
268 * Returns the closest ancestor of the given actor that is a layout control.
269 * @param actor The actor to be checked for its parent layout control
270 * @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
272 Toolkit::Control GetParentLayoutControl(Actor actor) const;
275 * Callback for the key event when no actor in the stage has gained the key input focus
276 * @param[in] event The KeyEvent event.
278 void OnKeyEvent( const KeyEvent& event );
281 * Callback for the touch event when the screen is touched and when the touch ends
282 * (i.e. the down & up touch events only).
283 * @param[in] touch The touch information
285 void OnTouch( const TouchData& touch );
288 * Called when the window focus is changed.
289 * @param[in] window The window whose focus is changed
290 * @param[in] focusIn Whether the focus is in/out
292 void OnWindowFocusChanged( Window window, bool focusIn );
295 * Get the focus Actor from current window
297 Actor GetFocusActorFromCurrentWindow();
302 KeyboardFocusManager(const KeyboardFocusManager&);
304 KeyboardFocusManager& operator=(const KeyboardFocusManager& rhs);
308 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType mPreFocusChangeSignal; ///< The signal to notify the focus will be changed
309 Toolkit::KeyboardFocusManager::FocusChangedSignalType mFocusChangedSignal; ///< The signal to notify the focus change
310 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType mFocusGroupChangedSignal; ///< The signal to notify the focus group change
311 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType mFocusedActorEnterKeySignal; ///< The signal to notify that enter has been pressed on the focused actor
313 WeakHandle< Actor > mCurrentFocusActor; ///< A weak handle to the current focused actor
315 Actor mFocusIndicatorActor; ///< The focus indicator actor shared by all the keyboard focusable actors for highlight
317 FocusStack mFocusHistory; ///< Stack to contain pre-focused actor's BaseObject*
319 SlotDelegate< KeyboardFocusManager > mSlotDelegate;
321 CustomAlgorithmInterface* mCustomAlgorithmInterface; ///< The user's (application / toolkit) implementation of CustomAlgorithmInterface
323 typedef std::vector< std::pair< WeakHandle< Layer >, WeakHandle< Actor > > > FocusActorContainer;
325 FocusActorContainer mCurrentFocusActors; ///< A container of focused actors
327 WeakHandle< Layer > mCurrentFocusedWindow; ///< A weak handle to the current focused window's root layer
329 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.
331 EnableFocusedIndicatorState mEnableFocusIndicator; ///< Whether use focus indicator
333 FocusedIndicatorModeState mAlwaysShowIndicator; ///< Whether always show indicator. If true, the indicator would be directly shown when focused
335 bool mFocusGroupLoopEnabled:1; ///< Whether the focus movement is looped within the same focus group
337 bool mIsWaitingKeyboardFocusChangeCommit:1; /// A flag to indicate PreFocusChangeSignal emitted but the proposed focus actor is not commited by the application yet.
339 bool mClearFocusOnTouch:1; ///< Whether clear focus on touch.
342 } // namespace Internal
344 inline Internal::KeyboardFocusManager& GetImpl(Dali::Toolkit::KeyboardFocusManager& obj)
346 DALI_ASSERT_ALWAYS(obj);
348 Dali::BaseObject& handle = obj.GetBaseObject();
350 return static_cast<Internal::KeyboardFocusManager&>(handle);
353 inline const Internal::KeyboardFocusManager& GetImpl(const Dali::Toolkit::KeyboardFocusManager& obj)
355 DALI_ASSERT_ALWAYS(obj);
357 const Dali::BaseObject& handle = obj.GetBaseObject();
359 return static_cast<const Internal::KeyboardFocusManager&>(handle);
362 } // namespace Toolkit
366 #endif // DALI_TOOLKIT_INTERNAL_KEYBOARD_FOCUS_MANAGER_H