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96 lines
3.1 KiB
96 lines
3.1 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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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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jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
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changeListeners.add (listener);
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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 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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jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
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changeListeners.remove (listener);
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}
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void ChangeBroadcaster::removeAllChangeListeners()
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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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jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
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changeListeners.clear();
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}
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void ChangeBroadcaster::sendChangeMessage()
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{
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if (changeListeners.size() > 0)
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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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jassert (MessageManager::getInstance()->isThisTheMessageThread());
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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 (&ChangeListener::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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