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## com.trolltech.qt.core
Class QEvent

    java.lang.Object
      com.trolltech.qt.internal.QSignalEmitterInternal
          com.trolltech.qt.QSignalEmitter
              com.trolltech.qt.QtJambiObject
                  com.trolltech.qt.core.QEvent

All Implemented Interfaces:
  QtJambiInterface

Direct Known Subclasses:
  QAccessibleEvent, QActionEvent, QChildEvent, QClipboardEvent, QCloseEvent, QDragLeaveEvent, QDragResponseEvent, QDropEvent, QDynamicPropertyChangeEvent, QFileOpenEvent, QFocusEvent, QGraphicsSceneEvent, QHelpEvent, QHideEvent, QHoverEvent, QIconDragEvent, QInputEvent, QInputMethodEvent, QMoveEvent, QPaintEvent, QResizeEvent, QShortcutEvent, QShowEvent, QStatusTipEvent, QTimerEvent, QToolBarChangeEvent, QWhatsThisClickedEvent, QWindowStateChangeEvent

    public class QEvent

extends QtJambiObject

The QEvent class is the base class of all event classes. Event objects contain event parameters. Qt's main event loop (`QCoreApplication::exec()`) fetches native window system events from the event queue, translates them into QEvents, and sends the translated events to `QObject`s.

In general, events come from the underlying window system (`spontaneous()` returns true), but it is also possible to manually send events using `QCoreApplication::sendEvent()` and `QCoreApplication::postEvent()` (`spontaneous()` returns false).

QObjects receive events by having their `QObject::event()` function called. The function can be reimplemented in subclasses to customize event handling and add additional event types; QWidget::event() is a notable example. By default, events are dispatched to event handlers like `QObject::timerEvent()` and `QWidget::mouseMoveEvent()`. `QObject::installEventFilter()` allows an object to intercept events destined for another object.

The basic QEvent contains only an event type parameter and an "accept" flag. The accept flag set with `accept()`, and cleared with `ignore()`. It is set by default, but don't rely on this as subclasses may choose to clear it in their constructor.

Subclasses of QEvent contain additional parameters that describe the particular event.

See also:
  `QObject::event()`, `QObject::installEventFilter()`, QWidget::event(), `QCoreApplication::sendEvent()`, `QCoreApplication::postEvent()`, and `QCoreApplication::processEvents()`.

Nested Class Summary
`static class` | `QEvent.Type` This enum type defines the valid event types in Qt.

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
`QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9`

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal`

Field Summary

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`currentSender`

Constructor Summary
`QEvent(QEvent.Type type)` Contructs an event object of type `type`.

Method Summary
`void` | `accept()` Sets the accept flag of the event object, the equivalent of calling setAccepted(true).
`void` | `ignore()` Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).
`boolean` | `isAccepted()` the accept flag of the event object
`static int` | `registerEventType()` Registers and returns a custom event type.
`static int` | `registerEventType(int hint)` Registers and returns a custom event type.
`void` | `setAccepted(boolean accepted)` the accept flag of the event object
`protected void` | `setT(char t)` Sets the type of this QEvent to `t`.
`boolean` | `spontaneous()` Returns true if the event originated outside the application (a system event); otherwise returns false.
`protected char` | `t()` Returns the type of this QEvent.
`java.lang.String` | `toString()` Returns a string representation of the `this QEvent`.
`QEvent.Type` | `type()` Returns the event type.

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 com.trolltech.qt.internal.QSignalEmitterInternal
`__qt_signalInitialization`

Methods inherited from class java.lang.Object
`clone, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.trolltech.qt.QtJambiInterface
`disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership`

Constructor Detail

### QEvent

    public QEvent(QEvent.Type type)

  Contructs an event object of type `type`.

Method Detail

### accept

    public final void accept()

  Sets the accept flag of the event object, the equivalent of calling setAccepted(true).

  Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget.

See also:
  `ignore()`.

### ignore

    public final void ignore()

  Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).

  Clearing the accept parameter indicates that the event receiver does not want the event. Unwanted events might be propgated to the parent widget.

See also:
  `accept()`.

### isAccepted

    public final boolean isAccepted()

  the accept flag of the event object

  Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget. By default, `isAccepted()` is set to true, but don't rely on this as subclasses may choose to clear it in their constructor.

  For convenience, the accept flag can also be set with `accept()`, and cleared with `ignore()`.

### setAccepted

    public final void setAccepted(boolean accepted)

  the accept flag of the event object

  Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget. By default, `isAccepted()` is set to true, but don't rely on this as subclasses may choose to clear it in their constructor.

  For convenience, the accept flag can also be set with `accept()`, and cleared with `ignore()`.

### spontaneous

    public final boolean spontaneous()

  Returns true if the event originated outside the application (a system event); otherwise returns false.

  The return value of this function is not defined for paint events.

### type

    public final QEvent.Type type()

  Returns the event type.

### registerEventType

    public static int registerEventType()

  Registers and returns a custom event type. The `hint` provided will be used if it is available, otherwise it will return a value between `QEvent::User` and `QEvent::MaxUser` that has not yet been registered. The `hint` is ignored if its value is not between `QEvent::User` and `QEvent::MaxUser` .

### registerEventType

    public static int registerEventType(int hint)

  Registers and returns a custom event type. The `hint` provided will be used if it is available, otherwise it will return a value between `QEvent::User` and `QEvent::MaxUser` that has not yet been registered. The `hint` is ignored if its value is not between `QEvent::User` and `QEvent::MaxUser` .

### setT

    protected final void setT(char t)

  Sets the type of this QEvent to `t`.

### t

    protected final char t()

  Returns the type of this QEvent.

### toString

    public java.lang.String toString()

  Returns a string representation of the `this QEvent`.

  Overrides:
    `toString` in class `java.lang.Object`

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