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114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 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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