mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE library - "Jules' Utility Class Extensions"
|
|
Copyright 2004-11 by Raw Material Software Ltd.
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
JUCE can be redistributed and/or modified under the terms of the GNU General
|
|
Public License (Version 2), as published by the Free Software Foundation.
|
|
A copy of the license is included in the JUCE distribution, or can be found
|
|
online at www.gnu.org/licenses.
|
|
|
|
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
To release a closed-source product which uses JUCE, commercial licenses are
|
|
available: visit www.rawmaterialsoftware.com/juce for more information.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
ChangeBroadcaster::ChangeBroadcaster() noexcept
|
|
{
|
|
// are you trying to create this object before or after juce has been intialised??
|
|
jassert (MessageManager::instance != nullptr);
|
|
|
|
callback.owner = this;
|
|
}
|
|
|
|
ChangeBroadcaster::~ChangeBroadcaster()
|
|
{
|
|
// all event-based objects must be deleted BEFORE juce is shut down!
|
|
jassert (MessageManager::instance != nullptr);
|
|
}
|
|
|
|
void ChangeBroadcaster::addChangeListener (ChangeListener* const listener)
|
|
{
|
|
// Listeners can only be safely added when the event thread is locked
|
|
// You can use a MessageManagerLock if you need to call this from another thread.
|
|
jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
|
|
|
|
changeListeners.add (listener);
|
|
}
|
|
|
|
void ChangeBroadcaster::removeChangeListener (ChangeListener* const listener)
|
|
{
|
|
// Listeners can only be safely added when the event thread is locked
|
|
// You can use a MessageManagerLock if you need to call this from another thread.
|
|
jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
|
|
|
|
changeListeners.remove (listener);
|
|
}
|
|
|
|
void ChangeBroadcaster::removeAllChangeListeners()
|
|
{
|
|
// Listeners can only be safely added when the event thread is locked
|
|
// You can use a MessageManagerLock if you need to call this from another thread.
|
|
jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
|
|
|
|
changeListeners.clear();
|
|
}
|
|
|
|
void ChangeBroadcaster::sendChangeMessage()
|
|
{
|
|
if (changeListeners.size() > 0)
|
|
callback.triggerAsyncUpdate();
|
|
}
|
|
|
|
void ChangeBroadcaster::sendSynchronousChangeMessage()
|
|
{
|
|
// This can only be called by the event thread.
|
|
jassert (MessageManager::getInstance()->isThisTheMessageThread());
|
|
|
|
callback.cancelPendingUpdate();
|
|
callListeners();
|
|
}
|
|
|
|
void ChangeBroadcaster::dispatchPendingMessages()
|
|
{
|
|
callback.handleUpdateNowIfNeeded();
|
|
}
|
|
|
|
void ChangeBroadcaster::callListeners()
|
|
{
|
|
changeListeners.call (&ChangeListener::changeListenerCallback, this);
|
|
}
|
|
|
|
//==============================================================================
|
|
ChangeBroadcaster::ChangeBroadcasterCallback::ChangeBroadcasterCallback()
|
|
: owner (nullptr)
|
|
{
|
|
}
|
|
|
|
void ChangeBroadcaster::ChangeBroadcasterCallback::handleAsyncUpdate()
|
|
{
|
|
jassert (owner != nullptr);
|
|
owner->callListeners();
|
|
}
|