com.trolltech.qt.gui
Class QCloseEvent

java.lang.Object
  extended by com.trolltech.qt.QSignalEmitter
      extended by com.trolltech.qt.QtJambiObject
          extended by com.trolltech.qt.core.QEvent
              extended by com.trolltech.qt.gui.QCloseEvent
All Implemented Interfaces:
QtJambiInterface

public class QCloseEvent
extends QEvent

The QCloseEvent class contains parameters that describe a close event.

Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. They are also sent when you call QWidget::close() to close a widget programmatically.

Close events contain a flag that indicates whether the receiver wants the widget to be closed or not. When a widget accepts the close event, it is hidden (and destroyed if it was created with the Qt::WA_DeleteOnClose flag). If it refuses to accept the close event nothing happens. (Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this.)

The event handler QWidget::closeEvent() receives close events. The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handing, you should reimplement the event handler and ignore the event.

The closeEvent() in the Application example shows a close event handler that asks whether to save a document before closing.

If you want the widget to be deleted when it is closed, create it with the Qt::WA_DeleteOnClose flag. This is very useful for independent top-level windows in a multi-window application.

QObjects emits the destroyed() signal when they are deleted.

If the last top-level window is closed, the QApplication::lastWindowClosed() signal is emitted.

The isAccepted function returns true if the event's receiver has agreed to close the widget; call accept to agree to close the widget and call ignore if the receiver of this event does not want the widget to be closed.

See Also:
QWidget::close, QWidget::hide, QObject::destroyed, QCoreApplication::exec, QCoreApplication::quit, QApplication::lastWindowClosed

Nested Class Summary
 
Nested classes/interfaces inherited from class com.trolltech.qt.core.QEvent
QEvent.Type
 
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
QSignalEmitter.Signal0, QSignalEmitter.Signal1<A>, QSignalEmitter.Signal2<A,B>, QSignalEmitter.Signal3<A,B,C>, QSignalEmitter.Signal4<A,B,C,D>, QSignalEmitter.Signal5<A,B,C,D,E>, QSignalEmitter.Signal6<A,B,C,D,E,F>, QSignalEmitter.Signal7<A,B,C,D,E,F,G>, QSignalEmitter.Signal8<A,B,C,D,E,F,G,H>, QSignalEmitter.Signal9<A,B,C,D,E,F,G,H,I>
 
Constructor Summary
QCloseEvent()
          Constructs a close event object.
 
Method Summary
static QCloseEvent fromNativePointer(QNativePointer nativePointer)
          This function returns the QCloseEvent instance pointed to by nativePointer
 
Methods inherited from class com.trolltech.qt.core.QEvent
accept, ignore, isAccepted, setAccepted, setT, spontaneous, t, type
 
Methods inherited from class com.trolltech.qt.QtJambiObject
dispose, disposed, 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, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.trolltech.qt.QtJambiInterface
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership
 

Constructor Detail

QCloseEvent

public QCloseEvent()

Constructs a close event object.

See Also:
accept
Method Detail

fromNativePointer

public static QCloseEvent fromNativePointer(QNativePointer nativePointer)
This function returns the QCloseEvent instance pointed to by nativePointer

Parameters:
nativePointer - the QNativePointer of which object should be returned.