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java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QEvent
com.trolltech.qt.gui.QInputEvent
com.trolltech.qt.gui.QWheelEvent
public class QWheelEvent
The QWheelEvent class contains parameters that describe a wheel event. Wheel events are sent to the widget under the mouse cursor, but if that widget does not handle the event they are sent to the focus widget. The rotation distance is provided by delta()
. The functions pos()
and globalPos()
return the mouse cursor's location at the time of the event.
A wheel event contains a special accept flag that indicates whether the receiver wants the event. You should call ignore()
if you do not handle the wheel event; this ensures that it will be sent to the parent widget.
The QWidget::setEnabled()
function can be used to enable or disable mouse and keyboard events for a widget.
The event handler QWidget::wheelEvent()
receives wheel events.
QMouseEvent
, and QWidget::grabMouse()
.
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.core.QEvent |
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QEvent.Type |
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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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 |
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com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary |
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Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
currentSender |
Constructor Summary | |
---|---|
QWheelEvent(QPoint pos,
int delta,
Qt.MouseButtons buttons,
Qt.KeyboardModifiers modifiers)
Constructs a wheel event object. |
|
QWheelEvent(QPoint pos,
int delta,
Qt.MouseButtons buttons,
Qt.KeyboardModifiers modifiers,
Qt.Orientation orient)
Constructs a wheel event object. |
|
QWheelEvent(QPoint pos,
QPoint globalPos,
int delta,
Qt.MouseButtons buttons,
Qt.KeyboardModifiers modifiers)
Constructs a wheel event object. |
|
QWheelEvent(QPoint pos,
QPoint globalPos,
int delta,
Qt.MouseButtons buttons,
Qt.KeyboardModifiers modifiers,
Qt.Orientation orient)
Constructs a wheel event object. |
Method Summary | |
---|---|
Qt.MouseButtons |
buttons()
Returns the mouse state when the event occurred. |
int |
delta()
Returns the distance that the wheel is rotated, in eighths of a degree. |
protected QPoint |
g()
|
QPoint |
globalPos()
Returns the global position of the mouse pointer at the time of the event. |
int |
globalX()
Returns the global x position of the mouse cursor at the time of the event. |
int |
globalY()
Returns the global y position of the mouse cursor at the time of the event. |
protected Qt.MouseButtons |
mouseState()
|
protected Qt.Orientation |
o()
|
Qt.Orientation |
orientation()
Returns the wheel's orientation. |
protected QPoint |
p()
|
QPoint |
pos()
Returns the position of the mouse cursor relative to the widget that received the event. |
protected void |
setG(QPoint g)
|
protected void |
setMouseState(Qt.MouseButton[] mouseState)
|
protected void |
setMouseState(Qt.MouseButtons mouseState)
|
protected void |
setO(Qt.Orientation o)
|
protected void |
setP(QPoint p)
|
java.lang.String |
toString()
|
int |
x()
Returns the x position of the mouse cursor, relative to the widget that received the event. |
int |
y()
Returns the y position of the mouse cursor, relative to the widget that received the event. |
Methods inherited from class com.trolltech.qt.gui.QInputEvent |
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modifiers, modState, setModState, setModState |
Methods inherited from class com.trolltech.qt.core.QEvent |
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accept, ignore, isAccepted, registerEventType, registerEventType, setAccepted, setT, spontaneous, t, type |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
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__qt_signalInitialization |
Methods inherited from class java.lang.Object |
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clone, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
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public QWheelEvent(QPoint pos, QPoint globalPos, int delta, Qt.MouseButtons buttons, Qt.KeyboardModifiers modifiers)
The pos provides the location of the mouse cursor within the widget. The position in global coordinates is specified by globalPos. delta contains the rotation distance, modifiers holds the keyboard modifier flags at the time of the event, and orient holds the wheel's orientation.
pos()
, globalPos()
, delta()
, and state().
public QWheelEvent(QPoint pos, QPoint globalPos, int delta, Qt.MouseButtons buttons, Qt.KeyboardModifiers modifiers, Qt.Orientation orient)
The pos provides the location of the mouse cursor within the widget. The position in global coordinates is specified by globalPos. delta contains the rotation distance, modifiers holds the keyboard modifier flags at the time of the event, and orient holds the wheel's orientation.
pos()
, globalPos()
, delta()
, and state().
public QWheelEvent(QPoint pos, int delta, Qt.MouseButtons buttons, Qt.KeyboardModifiers modifiers)
The position, pos, is the location of the mouse cursor within the widget. The globalPos()
is initialized to QCursor::pos()
which is usually, but not always, correct. Use the other constructor if you need to specify the global position explicitly.
The buttons describe the state of the mouse buttons at the time of the event, delta contains the rotation distance, modifiers holds the keyboard modifier flags at the time of the event, and orient holds the wheel's orientation.
pos()
, delta()
, and state().
public QWheelEvent(QPoint pos, int delta, Qt.MouseButtons buttons, Qt.KeyboardModifiers modifiers, Qt.Orientation orient)
The position, pos, is the location of the mouse cursor within the widget. The globalPos()
is initialized to QCursor::pos()
which is usually, but not always, correct. Use the other constructor if you need to specify the global position explicitly.
The buttons describe the state of the mouse buttons at the time of the event, delta contains the rotation distance, modifiers holds the keyboard modifier flags at the time of the event, and orient holds the wheel's orientation.
pos()
, delta()
, and state().
Method Detail |
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public final Qt.MouseButtons buttons()
public final int delta()
Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120; i.e., 120 * 1/8 = 15.
Example:
public void wheelEvent(QWheelEvent event) { int numDegrees = event.delta() / 8; int numSteps = numDegrees / 15; if (event.orientation().equals(Qt.Orientation.Horizontal)) { scrollHorizontally(numSteps); } else { scrollVertically(numSteps); } event.accept(); }
public final QPoint globalPos()
globalPos()
can differ a lot from the current cursor position returned by QCursor::pos()
. globalX()
, and globalY()
.
public final int globalX()
globalY()
, and globalPos()
.
public final int globalY()
globalX()
, and globalPos()
.
public final Qt.Orientation orientation()
public final QPoint pos()
If you move your widgets around in response to mouse events, use globalPos()
instead of this function.
x()
, y()
, and globalPos()
.
public final int x()
y()
, and pos()
.
public final int y()
x()
, and pos()
.
protected final void setG(QPoint g)
protected final QPoint g()
protected final void setMouseState(Qt.MouseButton[] mouseState)
protected final void setMouseState(Qt.MouseButtons mouseState)
protected final Qt.MouseButtons mouseState()
protected final void setO(Qt.Orientation o)
protected final Qt.Orientation o()
protected final void setP(QPoint p)
protected final QPoint p()
public java.lang.String toString()
toString
in class QInputEvent
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