QScrollPrepareEvent Class Reference

The QScrollPrepareEvent class is sent in preparation of scrolling. More...

#include <qevent.h>

Inheritance diagram for QScrollPrepareEvent:

Collaboration diagram for QScrollPrepareEvent:

Public Member Functions
	QScrollPrepareEvent (const QPointF &startPos)
	~QScrollPrepareEvent ()
QScrollPrepareEvent *	clone () const override
QPointF	startPos () const
QSizeF	viewportSize () const
QRectF	contentPosRange () const
QPointF	contentPos () const
void	setViewportSize (const QSizeF &size)
void	setContentPosRange (const QRectF &rect)
void	setContentPos (const QPointF &pos)
Public Member Functions inherited from QEvent
	QEvent (Type type)
virtual	~QEvent ()
Type	type () const
bool	spontaneous () const
virtual void	setAccepted (bool accepted)
bool	isAccepted () const
void	accept ()
void	ignore ()
bool	isInputEvent () const noexcept
bool	isPointerEvent () const noexcept
bool	isSinglePointEvent () const noexcept

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 , FocusAboutToChange = 23 , 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 , 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 , ReadOnlyChange = 106 , 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 , AcceptDropsChange = 152 , 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 , GraphicsSceneLeave = 220 , 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 , StateMachineSignal = 192 ,   StateMachineWrapped = 193 , TouchBegin = 194 , TouchUpdate = 195 , TouchEnd = 196 ,   NativeGesture = 197 , RequestSoftwareInputPanel = 199 , CloseSoftwareInputPanel = 200 , WinIdChange = 203 ,   Gesture = 198 , GestureOverride = 202 , ScrollPrepare = 204 , Scroll = 205 ,   Expose = 206 , InputMethodQuery = 207 , OrientationChange = 208 , TouchCancel = 209 ,   ThemeChange = 210 , SockClose = 211 , PlatformPanel = 212 , StyleAnimationUpdate = 213 ,   ApplicationStateChange = 214 , WindowChangeInternal = 215 , ScreenChangeInternal = 216 , PlatformSurface = 217 ,   Pointer = 218 , TabletTrackingChange = 219 , User = 1000 , MaxUser = 65535 }
Static Public Member Functions inherited from QEvent
static int	registerEventType (int hint=-1) noexcept
Protected Member Functions inherited from QEvent
	QEvent (Type type, InputEventTag)
	QEvent (Type type, PointerEventTag)
	QEvent (Type type, SinglePointEventTag)
Protected Attributes inherited from QEvent
quint16	t

Detailed Description

The QScrollPrepareEvent class is sent in preparation of scrolling.

Since

4.8

\inmodule QtGui

The scroll prepare event is sent before scrolling (usually by QScroller) is started. The object receiving this event should set viewportSize, maxContentPos and contentPos. It also should accept this event to indicate that scrolling should be started.

It is not guaranteed that a QScrollEvent will be sent after an accepted QScrollPrepareEvent, e.g. in a case where the maximum content position is (0, 0).

See also

QScrollEvent, QScroller

Definition at line 1057 of file qevent.h.

Constructor & Destructor Documentation

QScrollPrepareEvent()

QScrollPrepareEvent::QScrollPrepareEvent ( const QPointF &  startPos )

explicit

Creates new QScrollPrepareEvent The startPos is the position of a touch or mouse event that started the scrolling.

Definition at line 4671 of file qevent.cpp.

~QScrollPrepareEvent()

QScrollPrepareEvent::~QScrollPrepareEvent

(

)

Destroys QScrollEvent.

Definition at line 4679 of file qevent.cpp.

Member Function Documentation

clone()

QScrollPrepareEvent* QScrollPrepareEvent::clone ( ) const

inlineoverridevirtual

Creates and returns an identical copy of this event.

Since

6.0

Reimplemented from QEvent.

Definition at line 1064 of file qevent.h.

contentPos()

QPointF QScrollPrepareEvent::contentPos ( ) const

inline

Returns the current position of the content as set by setContentPos.

Definition at line 1070 of file qevent.h.

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contentPosRange()

QRectF QScrollPrepareEvent::contentPosRange ( ) const

inline

Returns the range of coordinates for the content as set by setContentPosRange().

Definition at line 1069 of file qevent.h.

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setContentPos()

void QScrollPrepareEvent::setContentPos

(

const QPointF &

pos

)

Sets the current content position to pos.

See also

contentPos()

Definition at line 4731 of file qevent.cpp.

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setContentPosRange()

void QScrollPrepareEvent::setContentPosRange

(

const QRectF &

rect

)

Sets the range of content coordinates to rect.

See also

contentPosRange()

Definition at line 4721 of file qevent.cpp.

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setViewportSize()

void QScrollPrepareEvent::setViewportSize

(

const QSizeF &

size

)

Sets the size of the area that is to be scrolled to size.

See also

viewportSize()

Definition at line 4711 of file qevent.cpp.

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startPos()

QPointF QScrollPrepareEvent::startPos ( ) const

inline

Returns the position of the touch or mouse event that started the scrolling.

Definition at line 1066 of file qevent.h.

viewportSize()

QSizeF QScrollPrepareEvent::viewportSize ( ) const

inline

Returns size of the area that is to be scrolled as set by setViewportSize

See also

setViewportSize()

Definition at line 1068 of file qevent.h.

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The documentation for this class was generated from the following files:

• src/gui/kernel/qevent.h
• src/gui/kernel/qevent.cpp