Package org.csstudio.ui.util

Class DelayedNotificator

java.lang.Object

org.csstudio.ui.util.DelayedNotificator

public class DelayedNotificator
extends Object

A utility class to throttle actions caused by user interaction.

In some cases, user interaction may trigger actions that require some time to complete. Multiple interactions will need to cancel the previous submitted task in favor of the latest one. This class provides an easy implementation for that case.

Field Summary

Fields

Modifier and Type	Field	Description
static ScheduledExecutorService	exec

Constructor Summary

Constructors

Constructor	Description
DelayedNotificator(long delay, TimeUnit unit)	Creates a new notificator, with the delay given.

Method Summary

Modifier and Type	Method	Description
void	delayedExec(Widget widget, Runnable command)	Submits a command for the given widget.

Methods inherited from class java.lang.Object

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

Field Details

exec

public static ScheduledExecutorService exec

Constructor Details

DelayedNotificator

public DelayedNotificator(long delay,
 TimeUnit unit)

Creates a new notificator, with the delay given.

Only one task per notificator can be queue at a time.

Parameters:

delay - the delay

unit - the unit of the delay

Method Details

delayedExec

public void delayedExec(Widget widget,
 Runnable command)

Submits a command for the given widget. After the timeout, the command is executed on the display thread of the widget. If another command is submitted before the timeout, than the previous action is cancelled.

Parameters:

widget - the display thread of this widget will be used

command - the command to execute