103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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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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ChangeBroadcaster::ChangeBroadcaster() noexcept
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{
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broadcastCallback.owner = this;
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}
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ChangeBroadcaster::~ChangeBroadcaster()
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{
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}
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void ChangeBroadcaster::addChangeListener (ChangeListener* const listener)
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{
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// Listeners can only be safely added when the event thread is locked
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// You can use a MessageManagerLock if you need to call this from another thread.
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JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
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changeListeners.add (listener);
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anyListeners = true;
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}
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void ChangeBroadcaster::removeChangeListener (ChangeListener* const listener)
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{
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// Listeners can only be safely removed when the event thread is locked
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// You can use a MessageManagerLock if you need to call this from another thread.
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JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
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changeListeners.remove (listener);
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anyListeners = changeListeners.size() > 0;
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}
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void ChangeBroadcaster::removeAllChangeListeners()
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{
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// Listeners can only be safely removed when the event thread is locked
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// You can use a MessageManagerLock if you need to call this from another thread.
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JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
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changeListeners.clear();
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anyListeners = false;
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}
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void ChangeBroadcaster::sendChangeMessage()
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{
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if (anyListeners)
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broadcastCallback.triggerAsyncUpdate();
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}
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void ChangeBroadcaster::sendSynchronousChangeMessage()
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{
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// This can only be called by the event thread.
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JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
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broadcastCallback.cancelPendingUpdate();
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callListeners();
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}
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void ChangeBroadcaster::dispatchPendingMessages()
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{
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broadcastCallback.handleUpdateNowIfNeeded();
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}
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void ChangeBroadcaster::callListeners()
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{
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changeListeners.call ([this] (ChangeListener& l) { l.changeListenerCallback (this); });
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}
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//==============================================================================
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ChangeBroadcaster::ChangeBroadcasterCallback::ChangeBroadcasterCallback()
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: owner (nullptr)
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{
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}
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void ChangeBroadcaster::ChangeBroadcasterCallback::handleAsyncUpdate()
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{
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jassert (owner != nullptr);
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owner->callListeners();
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}
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} // namespace juce
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