80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/** Manages a list of ActionListeners, and can send them messages.
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To quickly add methods to your class that can add/remove action
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listeners and broadcast to them, you can derive from this.
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@see ActionListener, ChangeListener
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@tags{Events}
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*/
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class JUCE_API ActionBroadcaster
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{
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public:
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//==============================================================================
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/** Creates an ActionBroadcaster. */
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ActionBroadcaster();
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/** Destructor. */
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virtual ~ActionBroadcaster();
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//==============================================================================
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/** Adds a listener to the list.
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Trying to add a listener that's already on the list will have no effect.
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*/
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void addActionListener (ActionListener* listener);
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/** Removes a listener from the list.
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If the listener isn't on the list, this won't have any effect.
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*/
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void removeActionListener (ActionListener* listener);
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/** Removes all listeners from the list. */
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void removeAllActionListeners();
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//==============================================================================
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/** Broadcasts a message to all the registered listeners.
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@see ActionListener::actionListenerCallback
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*/
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void sendActionMessage (const String& message) const;
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private:
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//==============================================================================
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class ActionMessage;
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friend class ActionMessage;
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SortedSet<ActionListener*> actionListeners;
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CriticalSection actionListenerLock;
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JUCE_DECLARE_WEAK_REFERENCEABLE (ActionBroadcaster)
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JUCE_DECLARE_NON_COPYABLE (ActionBroadcaster)
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};
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} // namespace juce
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