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QtGui.QWheelEvent Class Reference

The QWheelEvent class contains parameters that describe a wheel event. More...

Inheritance diagram for QtGui.QWheelEvent:
Collaboration diagram for QtGui.QWheelEvent:

Public Member Functions

 QWheelEvent (QWheelEvent copy)
 
 QWheelEvent (QPoint pos, QPoint globalPos, int delta, Qt.MouseButton buttons, Qt.KeyboardModifier modifiers, Qt.Orientation orient=Qt.Orientation.Vertical)
 
 
 QWheelEvent (QPoint pos, int delta, Qt.MouseButton buttons, Qt.KeyboardModifier modifiers, Qt.Orientation orient=Qt.Orientation.Vertical)
 
 
override void CreateProxy ()
 
new void Dispose ()
 
- Public Member Functions inherited from QtGui.QInputEvent
 QInputEvent (QInputEvent copy)
 
 QInputEvent (QEvent.Type type, Qt.KeyboardModifier modifiers=Qt.KeyboardModifier.NoModifier)
 
new void Dispose ()
 
- Public Member Functions inherited from QtCore.QEvent
 QEvent (QEvent copy)
 
 QEvent (QEvent.Type type)
 
 
new void Accept ()
 
 
new void Ignore ()
 
 
new void SetAccepted (bool accepted)
 
new void Dispose ()
 

Protected Member Functions

 QWheelEvent (System.Type dummy)
 
- Protected Member Functions inherited from QtGui.QInputEvent
 QInputEvent (System.Type dummy)
 
- Protected Member Functions inherited from QtCore.QEvent
 QEvent (System.Type dummy)
 

Properties

Qt.MouseButton Buttons [get]
 
 
int Delta [get]
 
 
QPoint GlobalPos [get]
 
 
int GlobalX [get]
 
 
int GlobalY [get]
 
 
Qt.Orientation Orientation [get]
 
 
QPoint Pos [get]
 
 
int X [get]
 
 
int Y [get]
 
 
new int D [get, set]
 
new QPoint G [get, set]
 
new Qt.MouseButton MouseState [get, set]
 
new Qt.Orientation O [get, set]
 
new QPoint P [get, set]
 
- Properties inherited from QtGui.QInputEvent
Qt.KeyboardModifier Modifiers [get, set]
 
 
new Qt.KeyboardModifier ModState [get, set]
 
- Properties inherited from QtCore.QEvent
bool IsAccepted [get]
 
bool Spontaneous [get]
 
 
QEvent.Type type [get]
 
 
virtual System.IntPtr SmokeObject [get, set]
 
new ushort T [get, set]
 
static new QMetaObject StaticMetaObject [get]
 

Additional Inherited Members

- Public Types inherited from QtCore.QEvent
enum  Type {
  AcceptDropsChange = 152, AccessibilityDescription = 130, AccessibilityHelp = 119, AccessibilityPrepare = 86,
  ActionAdded = 114, ActionChanged = 113, ActionRemoved = 115, ActivateControl = 80,
  ActivationChange = 99, ApplicationActivate = 121, ApplicationActivated = 121, ApplicationDeactivate = 122,
  ApplicationDeactivated = 122, ApplicationFontChange = 36, ApplicationLayoutDirectionChange = 37, ApplicationPaletteChange = 38,
  ApplicationWindowIconChange = 35, ChildAdded = 68, ChildPolished = 69, ChildRemoved = 71,
  Clipboard = 40, Close = 19, CloseSoftwareInputPanel = 200, ContentsRectChange = 178,
  ContextMenu = 82, Create = 15, CursorChange = 183, DeactivateControl = 81,
  DeferredDelete = 52, Destroy = 16, DragEnter = 60, DragLeave = 62,
  DragMove = 61, DragResponse = 64, Drop = 63, DynamicPropertyChange = 170,
  EmbeddingControl = 79, EnabledChange = 98, Enter = 10, EnterWhatsThisMode = 124,
  FileOpen = 116, FocusIn = 8, FocusOut = 9, FontChange = 97,
  FutureCallOut = 180, Gesture = 198, GestureOverride = 202, GrabKeyboard = 188,
  GrabMouse = 186, GraphicsSceneContextMenu = 159, GraphicsSceneDragEnter = 164, GraphicsSceneDragLeave = 166,
  GraphicsSceneDragMove = 165, GraphicsSceneDrop = 167, GraphicsSceneHelp = 163, GraphicsSceneHoverEnter = 160,
  GraphicsSceneHoverLeave = 162, GraphicsSceneHoverMove = 161, GraphicsSceneMouseDoubleClick = 158, GraphicsSceneMouseMove = 155,
  GraphicsSceneMousePress = 156, GraphicsSceneMouseRelease = 157, GraphicsSceneMove = 182, GraphicsSceneResize = 181,
  GraphicsSceneWheel = 168, HelpRequest = 95, Hide = 18, HideToParent = 27,
  HoverEnter = 127, HoverLeave = 128, HoverMove = 129, IconDrag = 96,
  IconTextChange = 101, InputMethod = 83, KeyPress = 6, KeyRelease = 7,
  KeyboardLayoutChange = 169, LanguageChange = 89, LayoutDirectionChange = 90, LayoutRequest = 76,
  Leave = 11, LeaveWhatsThisMode = 125, LocaleChange = 88, MacGLClearDrawable = 191,
  MacGLWindowChange = 179, MacSizeChange = 177, MaxUser = 65535, MenubarUpdated = 153,
  MetaCall = 43, ModifiedChange = 102, MouseButtonDblClick = 4, MouseButtonPress = 2,
  MouseButtonRelease = 3, MouseMove = 5, MouseTrackingChange = 109, Move = 13,
  NativeGesture = 197, NetworkReplyUpdated = 185, NonClientAreaMouseButtonDblClick = 176, NonClientAreaMouseButtonPress = 174,
  NonClientAreaMouseButtonRelease = 175, NonClientAreaMouseMove = 173, None = 0, OkRequest = 94,
  Paint = 12, PaletteChange = 39, ParentAboutToChange = 131, ParentChange = 21,
  PlatformPanel = 212, Polish = 75, PolishRequest = 74, QueryWhatsThis = 123,
  Quit = 20, RequestSoftwareInputPanel = 199, Resize = 14, Shortcut = 117,
  ShortcutOverride = 51, Show = 17, ShowToParent = 26, ShowWindowRequest = 73,
  SockAct = 50, Speech = 42, StateMachineSignal = 192, StateMachineWrapped = 193,
  StatusTip = 112, Style = 91, StyleChange = 100, TabletEnterProximity = 171,
  TabletLeaveProximity = 172, TabletMove = 87, TabletPress = 92, TabletRelease = 93,
  ThreadChange = 22, Timer = 1, ToolBarChange = 120, ToolTip = 110,
  ToolTipChange = 184, TouchBegin = 194, TouchEnd = 196, TouchUpdate = 195,
  UngrabKeyboard = 189, UngrabMouse = 187, UpdateLater = 78, UpdateRequest = 77,
  UpdateSoftKeys = 201, User = 1000, WhatsThis = 111, WhatsThisClicked = 118,
  Wheel = 31, WinEventAct = 132, WinIdChange = 203, WindowActivate = 24,
  WindowBlocked = 103, WindowDeactivate = 25, WindowIconChange = 34, WindowStateChange = 105,
  WindowTitleChange = 33, WindowUnblocked = 104, ZOrderChange = 126, ZeroTimerEvent = 154
}
  More...
 
- Static Public Member Functions inherited from QtCore.QEvent
static int RegisterEventType (int hint=-1)
 
 
- Protected Attributes inherited from QtCore.QEvent
SmokeInvocation interceptor
 

Detailed Description

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.

See also QMouseEvent and QWidget::grabMouse().

Constructor & Destructor Documentation

QtGui.QWheelEvent.QWheelEvent ( System.Type  dummy)
protected
QtGui.QWheelEvent.QWheelEvent ( QWheelEvent  copy)
QtGui.QWheelEvent.QWheelEvent ( QPoint  pos,
QPoint  globalPos,
int  delta,
Qt.MouseButton  buttons,
Qt.KeyboardModifier  modifiers,
Qt.Orientation  orient = Qt.Orientation.Vertical 
)

Constructs a wheel event object.

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.

See also pos(), globalPos(), delta(), and state().

QtGui.QWheelEvent.QWheelEvent ( QPoint  pos,
int  delta,
Qt.MouseButton  buttons,
Qt.KeyboardModifier  modifiers,
Qt.Orientation  orient = Qt.Orientation.Vertical 
)

Constructs a wheel event object.

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.

See also pos(), delta(), and state().

Member Function Documentation

override void QtGui.QWheelEvent.CreateProxy ( )
virtual

Reimplemented from QtGui.QInputEvent.

new void QtGui.QWheelEvent.Dispose ( )

Property Documentation

Qt.MouseButton QtGui.QWheelEvent.Buttons
get

Returns the mouse state when the event occurred.

new int QtGui.QWheelEvent.D
getsetprotected
int QtGui.QWheelEvent.Delta
get

Returns the distance that the wheel is rotated, in eighths of a degree. A positive value indicates that the wheel was rotated forwards away from the user; a negative value indicates that the wheel was rotated backwards toward the user.

Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120; i.e., 120 units * 1/8 = 15 degrees.

However, some mice have finer-resolution wheels and send delta values that are less than 120 units (less than 15 degrees). To support this possibility, you can either cumulatively add the delta values from events until the value of 120 is reached, then scroll the widget, or you can partially scroll the widget in response to each wheel event.

Example:

void MyWidget::wheelEvent(QWheelEvent *event)

{

int numDegrees = event->delta() / 8;

int numSteps = numDegrees / 15;

if (event->orientation() == Qt::Horizontal) {

scrollHorizontally(numSteps);

} else {

scrollVertically(numSteps);

}

event->accept();

}

new QPoint QtGui.QWheelEvent.G
getsetprotected
QPoint QtGui.QWheelEvent.GlobalPos
get

Returns the global position of the mouse pointer at the time of the event. This is important on asynchronous window systems such as X11; whenever you move your widgets around in response to mouse events, globalPos() can differ a lot from the current cursor position returned by QCursor::pos().

See also globalX() and globalY().

int QtGui.QWheelEvent.GlobalX
get

Returns the global x position of the mouse cursor at the time of the event.

See also globalY() and globalPos().

int QtGui.QWheelEvent.GlobalY
get

Returns the global y position of the mouse cursor at the time of the event.

See also globalX() and globalPos().

new Qt.MouseButton QtGui.QWheelEvent.MouseState
getsetprotected
new Qt.Orientation QtGui.QWheelEvent.O
getsetprotected
Qt.Orientation QtGui.QWheelEvent.Orientation
get

Returns the wheel's orientation.

new QPoint QtGui.QWheelEvent.P
getsetprotected
QPoint QtGui.QWheelEvent.Pos
get

Returns the position of the mouse cursor relative to the widget that received the event.

If you move your widgets around in response to mouse events, use globalPos() instead of this function.

See also x(), y(), and globalPos().

int QtGui.QWheelEvent.X
get

Returns the x position of the mouse cursor, relative to the widget that received the event.

See also y() and pos().

int QtGui.QWheelEvent.Y
get

Returns the y position of the mouse cursor, relative to the widget that received the event.

See also x() and pos().