1 #ifndef __DALI_CONNECTION_TRACKER_INTERFACE_H__
2 #define __DALI_CONNECTION_TRACKER_INTERFACE_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 * @addtogroup CAPI_DALI_SIGNALS_MODULE
27 #include <dali/public-api/common/dali-common.h>
28 #include <dali/public-api/signals/signal-slot-observers.h>
30 namespace Dali DALI_IMPORT_API
34 * @brief Interface used to track connections between signals and slots.
36 * Performs automatic connection and disconnection when either the slot or signal dies.
39 * class MyApp : public ConnectionTracker
41 * Button.ClickedSignal().Connect( this, &MyApp::OnPress );
45 * std::cout << "hello world" << std::endl;
50 * When MyApp is destroyed, it automatically disconnects from Button.ClickSignal.
51 * It provides a signal observer interface, to observer when signals are destroyed
52 * e.g. if Button object is destroyed while it is still connected.
54 class ConnectionTrackerInterface : public SignalObserver
61 ConnectionTrackerInterface();
64 * @brief Virtual destructor.
66 virtual ~ConnectionTrackerInterface();
69 * @brief Called when a signal is connected.
71 * @param[in] slotObserver The slot observer i.e. a signal.
72 * @param[in] callback The call back.
74 virtual void SignalConnected( SlotObserver* slotObserver, CallbackBase* callback ) = 0;
77 * @brief Query the connection count.
79 * @return The number of signal/slot connections know by the connection tracker.
81 virtual std::size_t GetConnectionCount() const = 0;
85 ConnectionTrackerInterface( const ConnectionTrackerInterface& ); ///< undefined copy constructor
86 ConnectionTrackerInterface& operator=( const ConnectionTrackerInterface& ); ///< undefined assignment operator
94 #endif // __DALI_CONNECTION_TRACKER_INTERFACE_H__