net.sf.sdedit.ui.components
Class DelayedActivity

java.lang.Object
  java.lang.Thread
      net.sf.sdedit.ui.components.DelayedActivity

All Implemented Interfaces:

Runnable

Direct Known Subclasses:

RedrawThread

public abstract class DelayedActivity
extends Thread

A DelayedActivity is performed when a certain (changing) event has happened at some time and then has not happened again for a certain amount of time. That time is given by getDelay(), the activity to be performed is given by perform(). In order to indicate that the certain event has occurred, some caller must invoke indicateChange().

Author:

Markus Strauch

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

protected

DelayedActivity()

Method Summary

protected abstract int	getDelay()
void	indicateChange()
protected abstract void	perform() Performs the desired activity if something has changed (as indicated by indicateChange(), the delay has passed and no change has been indicated in that time.
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DelayedActivity

protected DelayedActivity()

Method Detail

indicateChange

public void indicateChange()

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

getDelay

protected abstract int getDelay()

perform

protected abstract void perform()

Performs the desired activity if something has changed (as indicated by indicateChange(), the delay has passed and no change has been indicated in that time. This method is always invoked in a monitor that is guarded by the lock associated with this DelayedActivity.