1 #ifndef __DALI_IMF_MANAGER_H__
2 #define __DALI_IMF_MANAGER_H__
5 * Copyright (c) 2015 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-handle.h>
23 #include <dali/public-api/signals/dali-signal.h>
28 namespace Internal DALI_INTERNAL
37 * @brief The ImfManager class
39 * Specifically manages the ecore input method framework which enables the virtual or hardware keyboards.
41 class DALI_IMPORT_API ImfManager : public BaseHandle
46 * @brief Events that are generated by the IMF.
51 PREEDIT, ///< Pre-Edit changed
52 COMMIT, ///< Commit recieved
53 DELETESURROUNDING, ///< Event to delete a range of characters from the string
54 GETSURROUNDING ///< Event to query string and cursor position
58 * @brief This structure is used to pass on data from the IMF regarding predictive text.
63 * @brief Default Constructor.
76 * @param[in] aEventName The name of the event from the IMF.
77 * @param[in] aPredictiveString The pre-edit or commit string.
78 * @param[in] aCursorOffset Start position from the current cursor position to start deleting characters.
79 * @param[in] aNumberOfChars The number of characters to delete from the cursorOffset.
81 ImfEventData( ImfEvent aEventName, const std::string& aPredictiveString, int aCursorOffset, int aNumberOfChars )
82 : predictiveString( aPredictiveString ),
83 eventName( aEventName ),
84 cursorOffset( aCursorOffset ),
85 numberOfChars( aNumberOfChars )
90 std::string predictiveString; ///< The pre-edit or commit string.
91 ImfEvent eventName; ///< The name of the event from the IMF.
92 int cursorOffset; ///< Start position from the current cursor position to start deleting characters.
93 int numberOfChars; ///< number of characters to delete from the cursorOffset.
97 * @brief Data required by IMF from the callback
99 struct ImfCallbackData
108 preeditResetRequired( false )
114 * @param[in] aUpdate True if cursor position needs to be updated
115 * @param[in] aCursorPosition new position of cursor
116 * @param[in] aCurrentText current text string
117 * @param[in] aPreeditResetRequired flag if preedit reset is required.
119 ImfCallbackData( bool aUpdate, int aCursorPosition, const std::string& aCurrentText, bool aPreeditResetRequired )
120 : currentText( aCurrentText ),
121 cursorPosition( aCursorPosition ),
123 preeditResetRequired( aPreeditResetRequired )
127 std::string currentText; ///< current text string
128 int cursorPosition; ///< new position of cursor
129 bool update :1; ///< if cursor position needs to be updated
130 bool preeditResetRequired :1; ///< flag if preedit reset is required.
133 typedef Signal< void (ImfManager&) > ImfManagerSignalType; ///< Keyboard actived signal
134 typedef Signal< ImfCallbackData ( ImfManager&, const ImfEventData& ) > ImfEventSignalType; ///< keyboard events
139 * @brief Retrieve a handle to the instance of ImfManager.
140 * @return A handle to the ImfManager.
142 static ImfManager Get();
145 * @brief Activate the IMF.
147 * It means that the text editing is started at somewhere.
148 * If the H/W keyboard isn't connected then it will show the virtual keyboard.
153 * @brief Deactivate the IMF.
155 * It means that the text editing is finished at somewhere.
160 * @brief Get the restoration status, which controls if the keyboard is restored after the focus lost then regained.
162 * If true then keyboard will be restored (activated) after focus is regained.
163 * @return restoration status.
165 bool RestoreAfterFocusLost() const;
168 * @brief Set status whether the IMF has to restore the keyboard after losing focus.
170 * @param[in] toggle True means that keyboard should be restored after focus lost and regained.
172 void SetRestoreAfterFocusLost( bool toggle );
175 * @brief Send message reset the pred-edit state / imf module.
177 * Used to interupt pre-edit state maybe due to a touch input.
182 * @brief Notifies IMF context that the cursor position has changed, required for features like auto-capitalisation.
184 void NotifyCursorPosition();
187 * @brief Sets cursor position stored in VirtualKeyboard, this is required by the IMF context.
189 * @param[in] cursorPosition position of cursor
191 void SetCursorPosition( unsigned int cursorPosition );
194 * @brief Gets cursor position stored in VirtualKeyboard, this is required by the IMF context.
196 * @return current position of cursor
198 unsigned int GetCursorPosition() const;
201 * @brief Method to store the string required by the IMF, this is used to provide predictive word suggestions.
203 * @param[in] text The text string surrounding the current cursor point.
205 void SetSurroundingText( const std::string& text );
208 * @brief Gets current text string set within the IMF manager, this is used to offer predictive suggestions.
210 * @return current position of cursor
212 const std::string& GetSurroundingText() const;
219 * @brief This is emitted when the virtual keyboard is connected to or the hardware keyboard is activated.
221 * @return The IMF Activated signal.
223 ImfManagerSignalType& ActivatedSignal();
226 * @brief This is emitted when the IMF manager receives an event from the IMF.
228 * @return The Event signal containing the event data.
230 ImfEventSignalType& EventReceivedSignal();
232 // Construction & Destruction
235 * @brief Constructor.
242 * This is non-virtual since derived Handle types must not contain data or virtual methods.
247 * @brief This constructor is used by ImfManager::Get().
249 * @param[in] imfManager A pointer to the imf Manager.
251 explicit DALI_INTERNAL ImfManager( Internal::Adaptor::ImfManager* imfManager );
256 #endif // __DALI_IMF_MANAGER_H__