The QHoverEvent class contains parameters that describe a mouse event. More...

#include <qevent.h>

Inheritance diagram for QHoverEvent:

Public Functions
const QPoint &	oldPos () const
	Returns the previous position of the mouse cursor, relative to the widget that received the event. More...

const QPoint &	pos () const
	Returns the position of the mouse cursor, relative to the widget that received the event. More...

	QHoverEvent (Type type, const QPoint &pos, const QPoint &oldPos)
	Constructs a hover event object. More...

	~QHoverEvent ()

Public Functions inherited from QEvent
void	accept ()
	Sets the accept flag of the event object, the equivalent of calling setAccepted(true). More...

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

bool	isAccepted () const

	QEvent (Type type)
	Contructs an event object of type type. More...

void	setAccepted (bool accepted)

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

Type	type () const
	Returns the event type. More...

virtual	~QEvent ()
	Destroys the event. More...

Protected Variables
QPoint	op

QPoint	p

Protected Variables inherited from QEvent
QEventPrivate *	d

ushort	t

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

Static Public Functions inherited from QEvent
static int	registerEventType (int hint=-1)
	Registers and returns a custom event type. More...

Detailed Description

The QHoverEvent class contains parameters that describe a mouse event.

Mouse events occur when a mouse cursor is moved into, out of, or within a widget, and if the widget has the Qt::WA_Hover attribute.

The function pos() gives the current cursor position, while oldPos() gives the old mouse position.

There are a few similarities between the events QEvent::HoverEnter and QEvent::HoverLeave, and the events QEvent::Enter and QEvent::Leave. However, they are slightly different because we do an update() in the event handler of HoverEnter and HoverLeave.

QEvent::HoverMove is also slightly different from QEvent::MouseMove. Let us consider a top-level window A containing a child B which in turn contains a child C (all with mouse tracking enabled):

Now, if you move the cursor from the top to the bottom in the middle of A, you will get the following QEvent::MouseMove events:

A::MouseMove
B::MouseMove
C::MouseMove

You will get the same events for QEvent::HoverMove, except that the event always propagates to the top-level regardless whether the event is accepted or not. It will only stop propagating with the Qt::WA_NoMousePropagation attribute.

In this case the events will occur in the following way:

A::HoverMove
A::HoverMove, B::HoverMove
A::HoverMove, B::HoverMove, C::HoverMove

Definition at line 125 of file qevent.h.

Constructors and Destructors

◆ QHoverEvent()

QHoverEvent::QHoverEvent	(	Type	type,
		const QPoint &	pos,
		const QPoint &	oldPos
	)

Constructs a hover event object.

The type parameter must be QEvent::HoverEnter, QEvent::HoverLeave, or QEvent::HoverMove.

The pos is the current mouse cursor's position relative to the receiving widget, while oldPos is the previous mouse cursor's position relative to the receiving widget.

Definition at line 531 of file qevent.cpp.

     : QEvent(type), p(pos), op(oldPos)
 {
 }

◆ ~QHoverEvent()

QHoverEvent::~QHoverEvent ( )

Warning: This function is not part of the public interface.

Definition at line 539 of file qevent.cpp.

540 {

541 }

Functions

◆ oldPos()

const QPoint & QHoverEvent::oldPos ( ) const

inline

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

If there is no previous position, oldPos() will return the same position as pos().

On QEvent::HoverEnter events, this position will always be QPoint(-1, -1).

See also: pos()

Definition at line 132 of file qevent.h.

Referenced by QTabBar::event().

132 { return op; }

QHoverEvent::op

QPoint op

Definition: qevent.h:135

◆ pos()

const QPoint & QHoverEvent::pos ( ) const

inline

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

On QEvent::HoverLeave events, this position will always be QPoint(-1, -1).

See also: oldPos()

Definition at line 131 of file qevent.h.

Referenced by QToolBar::event(), QTabBar::event(), QHeaderView::event(), and QTreeView::viewportEvent().

131 { return p; }

QHoverEvent::p

QPoint p

Definition: qevent.h:135

Properties

◆ op

QPoint QHoverEvent::op

protected

Definition at line 135 of file qevent.h.

◆ p

QPoint QHoverEvent::p