Class MasterAdapter
- java.lang.Object
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- org.deepsymmetry.beatlink.MasterAdapter
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- All Implemented Interfaces:
BeatListener
,MasterListener
public abstract class MasterAdapter extends Object implements MasterListener
An abstract adapter class for receiving updates related to the tempo master. The methods in this class are empty; it exists as a convenience for creating listener objects.
Extend this class to create a
MasterListener
and override only the methods for events that you care about. If you plan to implement all the methods in the interface, you might as well implementMasterListener
directly.Create a listener object using your extended class and then register it using
VirtualCdj.addMasterListener(MasterListener)
. Whenever a relevant change occurs, the appropriate method in the listener object is invoked, and theDeviceUpdate
which reported the change is passed to it.- Author:
- James Elliott
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Constructor Summary
Constructors Constructor Description MasterAdapter()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
masterChanged(DeviceUpdate update)
Invoked when there is a change in which device is the current tempo master.void
newBeat(Beat beat)
Invoked when a beat is reported by the tempo master, as long as theBeatFinder
is active.void
tempoChanged(double tempo)
Invoked when the master tempo has changed.
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Method Detail
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masterChanged
public void masterChanged(DeviceUpdate update)
Description copied from interface:MasterListener
Invoked when there is a change in which device is the current tempo master.
To reduce latency, tempo master updates are delivered to listeners directly on the thread that is receiving them from the network, so if you want to interact with user interface objects in this method, you need to use
javax.swing.SwingUtilities.invokeLater(Runnable)
to do so on the Event Dispatch Thread.Even if you are not interacting with user interface objects, any code in this method must finish quickly, or it will add latency for other listeners, and master updates will back up. If you want to perform lengthy processing of any sort, do so on another thread.
- Specified by:
masterChanged
in interfaceMasterListener
- Parameters:
update
- the message identifying the new master, ornull
if there is now none
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newBeat
public void newBeat(Beat beat)
Invoked when a beat is reported by the tempo master, as long as the
BeatFinder
is active. Even though beats contain far less detailed information than status updates, they can be passed toVirtualCdj.getLatestStatusFor(DeviceUpdate)
to find the current detailed status for that device, as long as the Virtual CDJ is active.To reduce latency, tempo master updates are delivered to listeners directly on the thread that is receiving them from the network, so if you want to interact with user interface objects in this method, you need to use
javax.swing.SwingUtilities.invokeLater(Runnable)
to do so on the Event Dispatch Thread.Even if you are not interacting with user interface objects, any code in this method must finish quickly, or it will add latency for other listeners, and master updates will back up. If you want to perform lengthy processing of any sort, do so on another thread.
- Specified by:
newBeat
in interfaceBeatListener
- Parameters:
beat
- the message which announced the start of the new beat
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tempoChanged
public void tempoChanged(double tempo)
Description copied from interface:MasterListener
Invoked when the master tempo has changed.
To reduce latency, tempo master updates are delivered to listeners directly on the thread that is receiving them from the network, so if you want to interact with user interface objects in this method, you need to use
javax.swing.SwingUtilities.invokeLater(Runnable)
to do so on the Event Dispatch Thread.Even if you are not interacting with user interface objects, any code in this method must finish quickly, or it will add latency for other listeners, and master updates will back up. If you want to perform lengthy processing of any sort, do so on another thread.
- Specified by:
tempoChanged
in interfaceMasterListener
- Parameters:
tempo
- the new master tempo
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