com.trolltech.qt.core
Class QRunnable

java.lang.Object
  com.trolltech.qt.QSignalEmitter
      com.trolltech.qt.QtJambiObject
          com.trolltech.qt.core.QRunnable

All Implemented Interfaces:

QtJambiInterface

public abstract class QRunnable
extends QtJambiObject

The QRunnable class is the base class for all runnable objects. The QRunnable class is an interface for representing a task or piece of code that needs to be executed, represented by your reimplementation of the run() function.

You can use QThreadPool to execute your code in a separate thread. QThreadPool deletes the QRunnable automatically if autoDelete() returns true (the default). Use setAutoDelete() to change the auto-deletion flag.

QThreadPool supports executing the same QRunnable more than once by calling QThreadPool::tryStart(this) from within the run() function. If autoDelete is enabled the QRunnable will be deleted when the last thread exits the run function. Calling QThreadPool::start() multiple times with the same QRunnable when autoDelete is enabled creates a race condition and is not recommended.

See also:

QThreadPool.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter

QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9

Constructor Summary

QRunnable()
Constructs a QRunnable.

Method Summary

boolean	autoDelete() Returns true is auto-deletion is enabled; false otherwise.
static QRunnable	fromNativePointer(QNativePointer nativePointer) This method returns the QRunnable instance pointed to by nativePointer.
abstract void	run() Implement this pure virtual function in your subclass.
void	setAutoDelete(boolean _autoDelete) Enables auto-deletion if autoDelete is true; otherwise auto-deletion is disabled.

Methods inherited from class com.trolltech.qt.QtJambiObject

dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr

Methods inherited from class com.trolltech.qt.QSignalEmitter

blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.trolltech.qt.QtJambiInterface

disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership

Constructor Detail

QRunnable

public QRunnable()

Constructs a QRunnable. Auto-deletion is enabled by default.

See also:

autoDelete(), and setAutoDelete().

Method Detail

autoDelete

public final boolean autoDelete()

Returns true is auto-deletion is enabled; false otherwise.

If auto-deletion is enabled, QThreadPool will automatically delete this runnable after calling run(); otherwise, ownership remains with the application programmer.

See also:

setAutoDelete(), and QThreadPool.

setAutoDelete

public final void setAutoDelete(boolean _autoDelete)

Enables auto-deletion if autoDelete is true; otherwise auto-deletion is disabled.

If auto-deletion is enabled, QThreadPool will automatically delete this runnable after calling run(); otherwise, ownership remains with the application programmer.

Note that this flag must be set before calling QThreadPool::start(). Calling this function after QThreadPool::start() results in undefined behavior.

See also:

autoDelete(), and QThreadPool.

run

public abstract void run()

Implement this pure virtual function in your subclass.

fromNativePointer

public static QRunnable fromNativePointer(QNativePointer nativePointer)

This method returns the QRunnable instance pointed to by nativePointer.