1 #ifndef __DALI_SIGNAL_SLOT_CONNECTIONS_H__
2 #define __DALI_SIGNAL_SLOT_CONNECTIONS_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/signals/signal-slot-observers.h>
27 * @addtogroup dali-core-signals
34 * @brief Slot connection is the connection information held by a connection tracker.
36 * A slot can have zero to many connection objects, depending
37 * on how many signals it is connected to.
39 * A connection contains:
41 * - SlotObserver -interface provided by the signal
43 * It holds a pointer to the callback, but does not own it.
45 class DALI_IMPORT_API SlotConnection
52 * @param[in] slotObserver The slot observer.
53 * @param[in] callback A callback object (not owned).
55 SlotConnection(SlotObserver* slotObserver, CallbackBase* callback);
58 * @brief Non-virtual destructor, not intended as a base class.
63 * @brief Retrieve the callback.
65 * @return A pointer to the callback.
67 CallbackBase* GetCallback();
70 * @brief Retrieve the slot observer.
72 * @return A pointer to the slot observer.
74 SlotObserver* GetSlotObserver();
78 SlotConnection( const SlotConnection& ); ///< undefined copy constructor
79 SlotConnection& operator=( const SlotConnection& ); ///< undefined assignment operator
83 SlotObserver* mSlotObserver; ///< a pointer to the slot observer (not owned)
84 CallbackBase* mCallback; ///< The callback. This is not owned, the corresponding SignalConnection has ownership.
88 * @brief SignalConnection is the connection information held by the signal.
90 * A signal can have zero to many connections, depending on how
91 * many slots are connected to this signal.
93 * A connection contains:
95 * - SignalObserver - interface provided by a slot owning object.
97 * It takes ownership of the callback, and will delete it when
98 * the connection is destroyed.
100 class DALI_IMPORT_API SignalConnection
105 * @brief Constructor.
107 * @param[in] callback The callback which should be a C function.
109 SignalConnection( CallbackBase* callback );
112 * @brief Constructor.
114 * @param[in] signalObserver The signal observer.
115 * @param[in] callback Ownership of this callback object is taken.
117 SignalConnection( SignalObserver* signalObserver, CallbackBase* callback );
120 * @brief Non-virtual destructor, not intended as a base class.
125 * @brief Disconnect the signal from the slot.
127 * @param[in] slotObserver The signal disconnecting from the slot.
129 void Disconnect( SlotObserver* slotObserver );
132 * @brief Retrieve the callback.
134 * @return A pointer to the callback.
136 CallbackBase* GetCallback();
140 SignalConnection( const SignalConnection& ); ///< undefined copy constructor
141 SignalConnection& operator=( const SignalConnection& ); ///< undefined assignment operator
145 SignalObserver* mSignalObserver; ///< a pointer to the signal observer (not owned)
146 CallbackBase* mCallback; ///< The callback, has ownership.
154 #endif // __DALI_SIGNAL_SLOT_CONNECTIONS_H__