1 #ifndef __DALI_IMF_MANAGER_H__
2 #define __DALI_IMF_MANAGER_H__
5 * Copyright (c) 2014 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
36 // TODO: Temporary patch to hidden ecore dependency. Must fix it.
37 typedef void* ImfContext;
40 * @brief The ImfManager class
42 * Specifically manages the ecore input method framework which enables the virtual or hardware keyboards.
44 class DALI_IMPORT_API ImfManager : public BaseHandle
49 * @brief Events that are generated by the IMF.
54 PREEDIT, ///< Pre-Edit changed
55 COMMIT, ///< Commit recieved
56 DELETESURROUNDING, ///< Event to delete a range of characters from the string
57 GETSURROUNDING ///< Event to query string and cursor position
61 * @brief This structure is used to pass on data from the IMF regarding predictive text.
66 * @brief Default Constructor.
79 * @param[in] aEventName The name of the event from the IMF.
80 * @param[in] aPredictiveString The pre-edit or commit string.
81 * @param[in] aCursorOffset Start position from the current cursor position to start deleting characters.
82 * @param[in] aNumberOfChars The number of characters to delete from the cursorOffset.
84 ImfEventData(ImfEvent aEventName, const std::string& aPredictiveString, int aCursorOffset,int aNumberOfChars )
85 : eventName(aEventName), predictiveString(aPredictiveString), cursorOffset( aCursorOffset ), numberOfChars( aNumberOfChars )
90 ImfEvent eventName; ///< The name of the event from the IMF.
91 std::string predictiveString; ///< The pre-edit or commit string.
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
105 : update( false ), cursorPosition( 0 ), preeditResetRequired ( false )
111 * @param[in] aUpdate True if cursor position needs to be updated
112 * @param[in] aCursorPosition new position of cursor
113 * @param[in] aCurrentText current text string
114 * @param[in] aPreeditResetRequired flag if preedit reset is required.
116 ImfCallbackData(bool aUpdate, int aCursorPosition, std::string aCurrentText, bool aPreeditResetRequired )
117 : update(aUpdate), cursorPosition(aCursorPosition), currentText( aCurrentText ), preeditResetRequired( aPreeditResetRequired )
121 bool update; ///< if cursor position needs to be updated
122 int cursorPosition; ///< new position of cursor
123 std::string currentText; ///< current text string
124 bool preeditResetRequired; ///< flag if preedit reset is required.
127 typedef Signal< void (ImfManager&) > ImfManagerSignalType; ///< Keyboard actived signal
129 typedef Signal< ImfCallbackData ( ImfManager&, const ImfEventData& ) > ImfEventSignalType; ///< keyboard events
134 * @brief Retrieve a handle to the instance of ImfManager.
135 * @return A handle to the ImfManager.
137 static ImfManager Get();
140 * @brief Get the current imf context.
141 * @return current imf context.
143 ImfContext GetContext();
146 * @brief Activate the IMF.
148 * It means that the text editing is started at somewhere.
149 * If the H/W keyboard isn't connected then it will show the virtual keyboard.
154 * @brief Deactivate the IMF.
156 * It means that the text editing is finished at somewhere.
161 * @brief Get the restoration status, which controls if the keyboard is restored after the focus lost then regained.
163 * If true then keyboard will be restored (activated) after focus is regained.
164 * @return restoration status.
166 bool RestoreAfterFocusLost() const;
169 * @brief Set status whether the IMF has to restore the keyboard after losing focus.
171 * @param[in] toggle True means that keyboard should be restored after focus lost and regained.
173 void SetRestoreAfterFocusLost( bool toggle );
176 * @brief Send message reset the pred-edit state / imf module.
178 * Used to interupt pre-edit state maybe due to a touch input.
183 * @brief Notifies IMF context that the cursor position has changed, required for features like auto-capitalisation.
185 void NotifyCursorPosition();
188 * @brief Sets cursor position stored in VirtualKeyboard, this is required by the IMF context.
190 * @param[in] cursorPosition position of cursor
192 void SetCursorPosition( unsigned int cursorPosition );
195 * @brief Gets cursor position stored in VirtualKeyboard, this is required by the IMF context.
197 * @return current position of cursor
199 int GetCursorPosition();
202 * @brief Method to store the string required by the IMF, this is used to provide predictive word suggestions.
204 * @param[in] text The text string surrounding the current cursor point.
206 void SetSurroundingText( std::string text );
209 * @brief Gets current text string set within the IMF manager, this is used to offer predictive suggestions.
211 * @return current position of cursor
213 std::string GetSurroundingText();
220 * @brief This is emitted when the virtual keyboard is connected to or the hardware keyboard is activated.
222 * @return The IMF Activated signal.
224 ImfManagerSignalType& ActivatedSignal();
227 * @brief This is emitted when the IMF manager receives an event from the IMF.
229 * @return The Event signal containing the event data.
231 ImfEventSignalType& EventReceivedSignal();
233 // Construction & Destruction
236 * @brief Constructor.
243 * This is non-virtual since derived Handle types must not contain data or virtual methods.
248 * @brief This constructor is used by ImfManager::Get().
250 * @param[in] imfManager A pointer to the imf Manager.
252 explicit DALI_INTERNAL ImfManager( Internal::Adaptor::ImfManager* imfManager );
257 #endif // __DALI_IMF_MANAGER_H__