JUCE
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Holds a list of ChangeListeners, and sends messages to them when instructed. More...
Public Member Functions | |
ChangeBroadcaster () noexcept | |
Creates an ChangeBroadcaster. More... | |
virtual | ~ChangeBroadcaster () |
Destructor. More... | |
void | addChangeListener (ChangeListener *listener) |
Registers a listener to receive change callbacks from this broadcaster. More... | |
void | removeChangeListener (ChangeListener *listener) |
Unregisters a listener from the list. More... | |
void | removeAllChangeListeners () |
Removes all listeners from the list. More... | |
void | sendChangeMessage () |
Causes an asynchronous change message to be sent to all the registered listeners. More... | |
void | sendSynchronousChangeMessage () |
Sends a synchronous change message to all the registered listeners. More... | |
void | dispatchPendingMessages () |
If a change message has been sent but not yet dispatched, this will call sendSynchronousChangeMessage() to make the callback immediately. More... | |
Holds a list of ChangeListeners, and sends messages to them when instructed.
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noexcept |
Creates an ChangeBroadcaster.
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virtual |
Destructor.
void juce::ChangeBroadcaster::addChangeListener | ( | ChangeListener * | listener | ) |
Registers a listener to receive change callbacks from this broadcaster.
Trying to add a listener that's already on the list will have no effect.
void juce::ChangeBroadcaster::removeChangeListener | ( | ChangeListener * | listener | ) |
Unregisters a listener from the list.
If the listener isn't on the list, this won't have any effect.
void juce::ChangeBroadcaster::removeAllChangeListeners | ( | ) |
Removes all listeners from the list.
void juce::ChangeBroadcaster::sendChangeMessage | ( | ) |
Causes an asynchronous change message to be sent to all the registered listeners.
The message will be delivered asynchronously by the main message thread, so this method will return immediately. To call the listeners synchronously use sendSynchronousChangeMessage().
Referenced by juce::SelectedItemSet< SelectableItemType >::changed().
void juce::ChangeBroadcaster::sendSynchronousChangeMessage | ( | ) |
Sends a synchronous change message to all the registered listeners.
This will immediately call all the listeners that are registered. For thread-safety reasons, you must only call this method on the main message thread.
Referenced by juce::SelectedItemSet< SelectableItemType >::changed().
void juce::ChangeBroadcaster::dispatchPendingMessages | ( | ) |
If a change message has been sent but not yet dispatched, this will call sendSynchronousChangeMessage() to make the callback immediately.
For thread-safety reasons, you must only call this method on the main message thread.