QtGui.QGraphicsView Class Reference

The QGraphicsView class provides a widget for displaying the contents of a QGraphicsScene. More...

Inheritance diagram for QtGui.QGraphicsView:

Collaboration diagram for QtGui.QGraphicsView:

Public Types
enum	CacheModeFlag { CacheBackground = 1, CacheNone = 0 }
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enum	DragMode { NoDrag = 0, RubberBandDrag = 2, ScrollHandDrag = 1 }
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enum	OptimizationFlag { DontAdjustForAntialiasing = 4, DontClipPainter = 1, DontSavePainterState = 2, IndirectPainting = 8 }
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enum	ViewportAnchor { AnchorUnderMouse = 2, AnchorViewCenter = 1, NoAnchor = 0 }
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enum	ViewportUpdateMode {   BoundingRectViewportUpdate = 4, FullViewportUpdate = 0, MinimalViewportUpdate = 1, NoViewportUpdate = 3,   SmartViewportUpdate = 2 }
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Public Member Functions
	QGraphicsView (QWidget parent=null)
	QGraphicsView (QGraphicsScene scene, QWidget parent=null)
override void	CreateProxy ()
new Qt.AlignmentFlag	alignment ()
new QGraphicsView.CacheModeFlag	cacheMode ()
new void	CenterOn (QPointF pos)
new void	CenterOn (IQGraphicsItem item)
new void	CenterOn (double x, double y)
new void	EnsureVisible (QRectF rect, int xmargin=50, int ymargin=50)
new void	EnsureVisible (IQGraphicsItem item, int xmargin=50, int ymargin=50)
new void	EnsureVisible (double x, double y, double w, double h, int xmargin=50, int ymargin=50)
override bool	OnEvent (QEvent @event)
new void	FitInView (QRectF rect, Qt.AspectRatioMode aspectRadioMode=Qt.AspectRatioMode.IgnoreAspectRatio)
new void	FitInView (IQGraphicsItem item, Qt.AspectRatioMode aspectRadioMode=Qt.AspectRatioMode.IgnoreAspectRatio)
new void	FitInView (double x, double y, double w, double h, Qt.AspectRatioMode aspectRadioMode=Qt.AspectRatioMode.IgnoreAspectRatio)
override object	InputMethodQuery (Qt.InputMethodQuery query)
new void	InvalidateScene ()
new void	InvalidateScene (QRectF rect, QGraphicsScene.SceneLayer layers=QGraphicsScene.SceneLayer.AllLayers)
new bool	IsTransformed ()
new IQGraphicsItem	ItemAt (QPoint pos)
new IQGraphicsItem	ItemAt (int x, int y)
new System.Collections.Generic.List < IQGraphicsItem >	Items ()
new System.Collections.Generic.List < IQGraphicsItem >	Items (QPoint pos)
new System.Collections.Generic.List < IQGraphicsItem >	Items (QRect rect, Qt.ItemSelectionMode mode=Qt.ItemSelectionMode.IntersectsItemShape)
new System.Collections.Generic.List < IQGraphicsItem >	Items (QPolygon polygon, Qt.ItemSelectionMode mode=Qt.ItemSelectionMode.IntersectsItemShape)
new System.Collections.Generic.List < IQGraphicsItem >	Items (QPainterPath path, Qt.ItemSelectionMode mode=Qt.ItemSelectionMode.IntersectsItemShape)
new System.Collections.Generic.List < IQGraphicsItem >	Items (int x, int y)
new System.Collections.Generic.List < IQGraphicsItem >	Items (int x, int y, int w, int h, Qt.ItemSelectionMode mode=Qt.ItemSelectionMode.IntersectsItemShape)
new QPoint	MapFromScene (QPointF point)
new QPolygon	MapFromScene (QRectF rect)
new QPolygon	MapFromScene (QPolygonF polygon)
new QPainterPath	MapFromScene (QPainterPath path)
new QPoint	MapFromScene (double x, double y)
new QPolygon	MapFromScene (double x, double y, double w, double h)
new QPointF	MapToScene (QPoint point)
new QPolygonF	MapToScene (QRect rect)
new QPolygonF	MapToScene (QPolygon polygon)
new QPainterPath	MapToScene (QPainterPath path)
new QPointF	MapToScene (int x, int y)
new QPolygonF	MapToScene (int x, int y, int w, int h)
new QGraphicsView.OptimizationFlag	optimizationFlags ()
new void	Render (QPainter painter)
new void	Render (QPainter painter, QRectF target)
new void	Render (QPainter painter, QRectF target, QRect source, Qt.AspectRatioMode aspectRatioMode=Qt.AspectRatioMode.KeepAspectRatio)
new QPainter.RenderHint	renderHints ()
new void	ResetCachedContent ()
new void	ResetMatrix ()
new void	ResetTransform ()
new void	Rotate (double angle)
new void	Scale (double sx, double sy)
new void	SetAlignment (Qt.AlignmentFlag alignment)
new void	SetCacheMode (QGraphicsView.CacheModeFlag mode)
new void	SetMatrix (QMatrix matrix, bool combine=false)
new void	SetOptimizationFlag (QGraphicsView.OptimizationFlag flag, bool enabled=true)
new void	SetOptimizationFlags (QGraphicsView.OptimizationFlag flags)
new void	SetRenderHint (QPainter.RenderHint hint, bool enabled=true)
new void	SetRenderHints (QPainter.RenderHint hints)
new void	SetSceneRect (double x, double y, double w, double h)
new void	SetTransform (QTransform matrix, bool combine=false)
new void	Shear (double sh, double sv)
override QSize	SizeHint ()
new void	Translate (double dx, double dy)
new void	UpdateScene (System.Collections.Generic.List< QRectF > rects)
new void	UpdateSceneRect (QRectF rect)
new QTransform	ViewportTransform ()
new void	Dispose ()
Public Member Functions inherited from QtGui.QAbstractScrollArea
	QAbstractScrollArea (QWidget parent=null)
new void	AddScrollBarWidget (QWidget widget, Qt.AlignmentFlag alignment)
override bool	OnEvent (QEvent arg1)
new QSize	MaximumViewportSize ()
override QSize	MinimumSizeHint ()
new System.Collections.Generic.List < QWidget >	ScrollBarWidgets (Qt.AlignmentFlag alignment)
new void	Dispose ()
Public Member Functions inherited from QtGui.QFrame
	QFrame (QWidget parent=null, Qt.WindowType f=0)
override bool	OnEvent (QEvent e)
new void	Dispose ()
Public Member Functions inherited from QtGui.QWidget
	QWidget (QWidget parent=null, Qt.WindowType f=0)
override void	CreateProxy ()
new System.Collections.Generic.List < QAction >	Actions ()
new void	ActivateWindow ()
new void	AddAction (QAction action)
new void	AddActions (System.Collections.Generic.List< QAction > actions)
new void	AdjustSize ()
new QWidget	ChildAt (QPoint p)
new QWidget	ChildAt (int x, int y)
new void	ClearFocus ()
new void	ClearMask ()
new bool	Close ()
new QRect	ContentsRect ()
new void	CreateWinId ()
virtual int	DevType ()
new NativeULong	EffectiveWinId ()
new void	EnsurePolished ()
override bool	OnEvent (QEvent arg1)
new QWidget	FocusWidget ()
new QFont	font ()
new QFontInfo	FontInfo ()
new QFontMetrics	FontMetrics ()
new QRect	geometry ()
new void	GetContentsMargins (ref int left, ref int top, ref int right, ref int bottom)
virtual System.IntPtr	GetDC ()
new void	GrabGesture (Qt.GestureType type, Qt.GestureFlag flags=0)
new void	GrabKeyboard ()
new void	GrabMouse ()
new void	GrabMouse (QCursor arg1)
new int	GrabShortcut (QKeySequence key, Qt.ShortcutContext context=Qt.ShortcutContext.WindowShortcut)
new QGraphicsProxyWidget	GraphicsProxyWidget ()
virtual int	HeightForWidth (int arg1)
new void	Hide ()
new Qt.InputMethodHint	inputMethodHints ()
new void	InsertAction (QAction before, QAction action)
new void	InsertActions (QAction before, System.Collections.Generic.List< QAction > actions)
new NativeULong	InternalWinId ()
new bool	IsAncestorOf (QWidget child)
new bool	IsEnabledTo (QWidget arg1)
new bool	IsEnabledToTLW ()
new bool	IsHidden ()
new bool	IsLeftToRight ()
new bool	IsRightToLeft ()
new bool	IsTopLevel ()
new bool	IsVisibleTo (QWidget arg1)
new bool	IsWindow ()
new void	Lower ()
new QPoint	MapFrom (QWidget arg1, QPoint arg2)
new QPoint	MapFromGlobal (QPoint arg1)
new QPoint	MapFromParent (QPoint arg1)
new QPoint	MapTo (QWidget arg1, QPoint arg2)
new QPoint	MapToGlobal (QPoint arg1)
new QPoint	MapToParent (QPoint arg1)
new void	Move (int x, int y)
new QWidget	NativeParentWidget ()
new QWidget	NextInFocusChain ()
new void	OverrideWindowFlags (Qt.WindowType type)
new void	OverrideWindowState (Qt.WindowState state)
virtual QPaintEngine	PaintEngine ()
new QPalette	palette ()
new QWidget	ParentWidget ()
new QWidget	PreviousInFocusChain ()
new void	Raise ()
virtual void	ReleaseDC (System.IntPtr arg1)
new void	ReleaseKeyboard ()
new void	ReleaseMouse ()
new void	ReleaseShortcut (int id)
new void	RemoveAction (QAction action)
new void	Render (IQPaintDevice target)
new void	Render (QPainter painter)
new void	Render (IQPaintDevice target, QPoint targetOffset)
new void	Render (QPainter painter, QPoint targetOffset)
new void	Render (IQPaintDevice target, QPoint targetOffset, QRegion sourceRegion, QWidget.RenderFlag renderFlags=QWidget.RenderFlag.DrawWindowBackground|QWidget.RenderFlag.DrawChildren)
new void	Render (QPainter painter, QPoint targetOffset, QRegion sourceRegion, QWidget.RenderFlag renderFlags=QWidget.RenderFlag.DrawWindowBackground|QWidget.RenderFlag.DrawChildren)
new void	Repaint ()
new void	Repaint (QRect arg1)
new void	Repaint (QRegion arg1)
new void	Repaint (int x, int y, int w, int h)
new void	Resize (int w, int h)
new bool	RestoreGeometry (QByteArray geometry)
new QByteArray	SaveGeometry ()
new void	Scroll (int dx, int dy)
new void	Scroll (int dx, int dy, QRect arg3)
new void	SetAttribute (Qt.WidgetAttribute arg1, bool on=true)
new void	SetBaseSize (int basew, int baseh)
new void	SetContentsMargins (int left, int top, int right, int bottom)
new void	SetDisabled (bool arg1)
new void	SetFixedHeight (int h)
new void	SetFixedSize (QSize arg1)
new void	SetFixedSize (int w, int h)
new void	SetFixedWidth (int w)
new void	SetFocus ()
new void	SetFocus (Qt.FocusReason reason)
new void	SetGeometry (int x, int y, int w, int h)
new void	SetHidden (bool hidden)
new void	SetInputMethodHints (Qt.InputMethodHint hints)
new void	SetMask (QBitmap arg1)
new void	SetMaximumSize (int maxw, int maxh)
new void	SetMinimumSize (int minw, int minh)
new void	SetParent (QWidget parent)
new void	SetParent (QWidget parent, Qt.WindowType f)
new void	SetShortcutAutoRepeat (int id, bool enable=true)
new void	SetShortcutEnabled (int id, bool enable=true)
new void	SetShown (bool shown)
new void	SetSizeIncrement (int w, int h)
new void	SetSizePolicy (QSizePolicy.Policy horizontal, QSizePolicy.Policy vertical)
virtual void	SetVisible (bool visible)
new void	Show ()
new void	ShowFullScreen ()
new void	ShowMaximized ()
new void	ShowMinimized ()
new void	ShowNormal ()
new void	StackUnder (QWidget arg1)
new bool	TestAttribute (Qt.WidgetAttribute arg1)
new QWidget	TopLevelWidget ()
new bool	UnderMouse ()
new void	UngrabGesture (Qt.GestureType type)
new void	UnsetCursor ()
new void	UnsetLayoutDirection ()
new void	UnsetLocale ()
new void	Update ()
new void	Update (QRect arg1)
new void	Update (QRegion arg1)
new void	Update (int x, int y, int w, int h)
new void	UpdateGeometry ()
new QRegion	VisibleRegion ()
new NativeULong	WinId ()
new QWidget	Window ()
new Qt.WindowType	WindowType ()
new void	Dispose ()
new int	ColorCount ()
new int	Depth ()
new int	HeightMM ()
new int	LogicalDpiX ()
new int	LogicalDpiY ()
new int	NumColors ()
new bool	PaintingActive ()
new int	PhysicalDpiX ()
new int	PhysicalDpiY ()
new int	WidthMM ()
Public Member Functions inherited from QtCore.QObject
	QObject (QObject parent=null)
new bool	BlockSignals (bool b)
new System.Collections.Generic.List < QObject >	Children ()
new bool	Connect (QObject sender, string signal, string member, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection)
new void	DeleteLater ()
new bool	Disconnect (QObject receiver, string member=null)
new bool	Disconnect (string signal=null, QObject receiver=null, string member=null)
new void	DumpObjectInfo ()
new void	DumpObjectTree ()
new System.Collections.Generic.List < QByteArray >	DynamicPropertyNames ()
virtual bool	EventFilter (QObject arg1, QEvent arg2)
new bool	Inherits (string classname)
new void	InstallEventFilter (QObject arg1)
new bool	IsWidgetType ()
new void	KillTimer (int id)
new object	Property (string name)
new void	RemoveEventFilter (QObject arg1)
new bool	SetProperty (string name, object value)
new void	SetUserData (uint id, QObjectUserData data)
new bool	SignalsBlocked ()
new int	StartTimer (int interval)
new QObjectUserData	UserData (uint id)
new void	Dispose ()
Public Member Functions inherited from QtCore.Qt
delegate QTextStream	FuncQTextStreamQTextStream (QTextStream qTextStream)
delegate string	FuncStringQByteArray (QByteArray qByteArray)
delegate QByteArray	FuncQByteArrayString (string @string)
delegate void	ActionQtMsgTypeString (QtMsgType qtMsgType, string @string)
delegate QObject	FuncQObject ()
Public Member Functions inherited from QtGui.IQPaintDevice
new int	ColorCount ()
new int	Depth ()
int	DevType ()
System.IntPtr	GetDC ()
new int	Height ()
new int	HeightMM ()
new int	LogicalDpiX ()
new int	LogicalDpiY ()
new int	NumColors ()
QPaintEngine	PaintEngine ()
new bool	PaintingActive ()
new int	PhysicalDpiX ()
new int	PhysicalDpiY ()
void	ReleaseDC (System.IntPtr hdc)
new int	Width ()
new int	WidthMM ()

Static Public Member Functions
static string	Tr (string s, string c=null)
static string	Tr (string s, string c, int n)
static string	TrUtf8 (string s, string c=null)
static string	TrUtf8 (string s, string c, int n)
Static Public Member Functions inherited from QtGui.QAbstractScrollArea
static string	Tr (string s, string c=null)
static string	Tr (string s, string c, int n)
static string	TrUtf8 (string s, string c=null)
static string	TrUtf8 (string s, string c, int n)
Static Public Member Functions inherited from QtGui.QFrame
static string	Tr (string s, string c=null)
static string	Tr (string s, string c, int n)
static string	TrUtf8 (string s, string c=null)
static string	TrUtf8 (string s, string c, int n)
Static Public Member Functions inherited from QtGui.QWidget
static QWidget	Find (NativeULong arg1)
static QWidget	KeyboardGrabber ()
static QWidget	MouseGrabber ()
static void	SetTabOrder (QWidget arg1, QWidget arg2)
static string	Tr (string s, string c=null)
static string	Tr (string s, string c, int n)
static string	TrUtf8 (string s, string c=null)
static string	TrUtf8 (string s, string c, int n)
Static Public Member Functions inherited from QtCore.QObject
static bool	Connect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod method, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection)
static bool	Connect (QObject sender, string signal, QObject receiver, string member, Qt.ConnectionType arg5=Qt.ConnectionType.AutoConnection)
static bool	Disconnect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod member)
static bool	Disconnect (QObject sender, string signal, QObject receiver, string member)
static uint	RegisterUserData ()
static string	Tr (string s, string c=null)
static string	Tr (string s, string c, int n)
static string	TrUtf8 (string s, string c=null)
static string	TrUtf8 (string s, string c, int n)
Static Public Member Functions inherited from QtCore.Qt
static QDataStream	Write (QDataStream s, object p)
static QDataStream	Write (QDataStream arg1, QSizeF arg2)
static QTextStream	Write (QTextStream s, Qt.FuncQTextStreamQTextStream f)
static QDataStream	Write (QDataStream arg1, QPoint arg2)
static QDataStream	Write (QDataStream arg1, QLineF arg2)
static QDataStream	Write (QDataStream arg1, QPointF arg2)
static QDataStream	Write (QDataStream arg1, QChar arg2)
static QDataStream	Write (QDataStream arg1, QByteArray arg2)
static QDataStream	Write (QDataStream arg1, QEasingCurve arg2)
static QDataStream	Write (QDataStream arg1, QRectF arg2)
static QDataStream	Write (QDataStream arg1, QDateTime arg2)
static QDataStream	Write (QDataStream arg1, QUrl arg2)
static QDataStream	Write (QDataStream arg1, QTime arg2)
static QDataStream	Write (QDataStream arg1, QLocale arg2)
static QDataStream	Write (QDataStream arg1, QBitArray arg2)
static QDataStream	Write (QDataStream arg1, QUuid arg2)
static QDataStream	Write (QDataStream arg1, QLine arg2)
static QDataStream	Write (QDataStream arg1, QDate arg2)
static QDataStream	Write (QDataStream @out, QRegExp regExp)
static QDataStream	Write (QDataStream arg1, QRect arg2)
static QDataStream	Write (QDataStream arg1, QSize arg2)
static QDataStream	Write (QDataStream s, QVariant.Type p)
static QDataStream	Write (QDataStream arg1, string arg2)
static QDataStream	Write (QDataStream @out, System.Collections.Generic.List< string > list)
static QDataStream	Read (QDataStream arg1, QChar arg2)
static QDataStream	Read (QDataStream arg1, QLocale arg2)
static QDataStream	Read (QDataStream arg1, QRect arg2)
static QDataStream	Read (QDataStream arg1, QEasingCurve arg2)
static QDataStream	Read (QDataStream arg1, QDate arg2)
static QDataStream	Read (QDataStream arg1, QUrl arg2)
static QDataStream	Read (QDataStream arg1, QUuid arg2)
static QTextStream	Read (QTextStream s, Qt.FuncQTextStreamQTextStream f)
static QDataStream	Read (QDataStream arg1, QLineF arg2)
static QDataStream	Read (QDataStream arg1, QRectF arg2)
static QDataStream	Read (QDataStream arg1, QPointF arg2)
static QDataStream	Read (QDataStream arg1, QLine arg2)
static QDataStream	Read (QDataStream arg1, QBitArray arg2)
static QDataStream	Read (QDataStream arg1, QSize arg2)
static QDataStream	Read (QDataStream arg1, QDateTime arg2)
static QDataStream	Read (QDataStream arg1, QTime arg2)
static QDataStream	Read (QDataStream arg1, QPoint arg2)
static QDataStream	Read (QDataStream @in, QRegExp regExp)
static QDataStream	Read (QDataStream s, object p)
static QDataStream	Read (QDataStream arg1, QByteArray arg2)
static QDataStream	Read (QDataStream arg1, QSizeF arg2)
static QDataStream	Read (QDataStream arg1, string arg2)
static QDataStream	Read (QDataStream s, QVariant.Type p)
static QDataStream	Read (QDataStream @in, System.Collections.Generic.List< string > list)
static double	qAcos (double v)
static void	qAddPostRoutine (System.Action arg1)
static string	qAppName ()
static double	qAsin (double v)
static double	qAtan (double v)
static double	qAtan2 (double x, double y)
static void	qBadAlloc ()
static int	qCeil (double v)
static ushort	qChecksum (string s, uint len)
static QByteArray	qCompress (QByteArray data)
static QByteArray	qCompress (QByteArray data, int compressionLevel=-1)
static QByteArray	qCompress (Pointer< byte > data, int nbytes)
static QByteArray	qCompress (Pointer< byte > data, int nbytes, int compressionLevel=-1)
static double	qCos (double v)
static double	qExp (double v)
static double	qFabs (double v)
static double	qFastCos (double x)
static double	qFastSin (double x)
static string	qFlagLocation (string method)
static int	qFloor (double v)
static bool	qFuzzyCompare (double p1, double p2)
static bool	qFuzzyCompare (float p1, float p2)
static bool	qFuzzyIsNull (double d)
static bool	qFuzzyIsNull (float f)
static uint	qHash (QBitArray key)
static uint	qHash (QChar key)
static uint	qHash (QStringRef key)
static uint	qHash (QUrl url)
static uint	qHash (QPersistentModelIndex index)
static uint	qHash (QByteArray key)
static uint	qHash (QModelIndex index)
static uint	qHash (uint key)
static uint	qHash (sbyte key)
static uint	qHash (byte key)
static uint	qHash (short key)
static uint	qHash (NativeLong key)
static uint	qHash (ushort key)
static uint	qHash (long key)
static uint	qHash (ulong key)
static uint	qHash (int key)
static uint	qHash (string key)
static uint	qHash (NativeULong key)
static double	qInf ()
static Qt.ActionQtMsgTypeString	qInstallMsgHandler (Qt.ActionQtMsgTypeString arg1)
static int	qIntCast (float f)
static int	qIntCast (double f)
static bool	qIsFinite (double d)
static bool	qIsFinite (float f)
static bool	qIsInf (float f)
static bool	qIsInf (double d)
static bool	qIsNaN (float f)
static bool	qIsNaN (double d)
static bool	qIsNull (float f)
static bool	qIsNull (double d)
static double	qLn (double v)
static double	qPow (double x, double y)
static double	qQNaN ()
static void	qRegisterStaticPluginInstanceFunction (Qt.FuncQObject function)
static void	qRemovePostRoutine (System.Action arg1)
static int	qRound (double d)
static long	qRound64 (double d)
static double	qSNaN ()
static bool	qSharedBuild ()
static double	qSin (double v)
static double	qSqrt (double v)
static bool	qStringComparisonHelper (QStringRef s1, string s2)
static double	qTan (double v)
static QByteArray	qUncompress (QByteArray data)
static QByteArray	qUncompress (Pointer< byte > data, int nbytes)
static string	qVersion ()
static void	Qbswap_helper (Pointer< byte > src, Pointer< byte > dest, int size)
static QByteArray	Qgetenv (string varName)
static bool	Qputenv (string varName, QByteArray value)
static int	Qrand ()
static void	Qsrand (uint seed)
static int	Qstrcmp (QByteArray str1, QByteArray str2)
static int	Qstrcmp (QByteArray str1, string str2)
static int	Qstrcmp (string str1, QByteArray str2)
static int	Qstrcmp (string str1, string str2)
static Pointer< sbyte >	Qstrcpy (Pointer< sbyte > dst, string src)
static Pointer< sbyte >	Qstrdup (string arg1)
static int	Qstricmp (string arg1, string arg2)
static uint	Qstrlen (string str)
static int	Qstrncmp (string str1, string str2, uint len)
static Pointer< sbyte >	Qstrncpy (Pointer< sbyte > dst, string src, uint len)
static int	Qstrnicmp (string arg1, string arg2, uint len)
static uint	Qstrnlen (string str, uint maxlen)
static string	QtTrId (string id, int n=-1)

Protected Member Functions
	QGraphicsView (System.Type dummy)
override void	OnContextMenuEvent (QContextMenuEvent @event)
override void	OnDragEnterEvent (QDragEnterEvent @event)
override void	OnDragLeaveEvent (QDragLeaveEvent @event)
override void	OnDragMoveEvent (QDragMoveEvent @event)
virtual void	DrawBackground (QPainter painter, QRectF rect)
virtual void	DrawForeground (QPainter painter, QRectF rect)
virtual void	DrawItems (QPainter painter, int numItems, IQGraphicsItem items, QStyleOptionGraphicsItem options)
override void	OnDropEvent (QDropEvent @event)
override void	OnFocusInEvent (QFocusEvent @event)
override bool	FocusNextPrevChild (bool next)
override void	OnFocusOutEvent (QFocusEvent @event)
override void	OnInputMethodEvent (QInputMethodEvent @event)
override void	OnKeyPressEvent (QKeyEvent @event)
override void	OnKeyReleaseEvent (QKeyEvent @event)
override void	OnMouseDoubleClickEvent (QMouseEvent @event)
override void	OnMouseMoveEvent (QMouseEvent @event)
override void	OnMousePressEvent (QMouseEvent @event)
override void	OnMouseReleaseEvent (QMouseEvent @event)
override void	OnPaintEvent (QPaintEvent @event)
override void	OnResizeEvent (QResizeEvent @event)
override void	ScrollContentsBy (int dx, int dy)
new void	SetupViewport (QWidget widget)
override void	OnShowEvent (QShowEvent @event)
override bool	OnViewportEvent (QEvent @event)
override void	OnWheelEvent (QWheelEvent @event)
Protected Member Functions inherited from QtGui.QAbstractScrollArea
	QAbstractScrollArea (System.Type dummy)
override void	OnContextMenuEvent (QContextMenuEvent arg1)
override void	OnDragEnterEvent (QDragEnterEvent arg1)
override void	OnDragLeaveEvent (QDragLeaveEvent arg1)
override void	OnDragMoveEvent (QDragMoveEvent arg1)
override void	OnDropEvent (QDropEvent arg1)
override void	OnKeyPressEvent (QKeyEvent arg1)
override void	OnMouseDoubleClickEvent (QMouseEvent arg1)
override void	OnMouseMoveEvent (QMouseEvent arg1)
override void	OnMousePressEvent (QMouseEvent arg1)
override void	OnMouseReleaseEvent (QMouseEvent arg1)
override void	OnPaintEvent (QPaintEvent arg1)
override void	OnResizeEvent (QResizeEvent arg1)
new void	SetViewportMargins (QMargins margins)
new void	SetViewportMargins (int left, int top, int right, int bottom)
new void	SetupViewport (QWidget viewport)
virtual bool	OnViewportEvent (QEvent arg1)
override void	OnWheelEvent (QWheelEvent arg1)
Protected Member Functions inherited from QtGui.QFrame
	QFrame (System.Type dummy)
override void	OnChangeEvent (QEvent arg1)
new void	DrawFrame (QPainter arg1)
override void	OnPaintEvent (QPaintEvent arg1)
Protected Member Functions inherited from QtGui.QWidget
	QWidget (System.Type dummy)
virtual void	OnActionEvent (QActionEvent arg1)
virtual void	OnCloseEvent (QCloseEvent arg1)
new void	Create ()
new void	Create (NativeULong arg1, bool initializeWindow=true, bool destroyOldWindow=true)
new void	OnCustomContextMenuRequested (QPoint pos)
new void	Destroy (bool destroyWindow=true, bool destroySubWindows=true)
virtual void	EnabledChange (bool arg1)
virtual void	OnEnterEvent (QEvent arg1)
virtual void	OnFocusInEvent (QFocusEvent arg1)
new bool	FocusNextChild ()
virtual void	OnFocusOutEvent (QFocusEvent arg1)
new bool	FocusPreviousChild ()
virtual void	FontChange (QFont arg1)
virtual void	OnHideEvent (QHideEvent arg1)
virtual void	OnInputMethodEvent (QInputMethodEvent arg1)
virtual void	OnKeyReleaseEvent (QKeyEvent arg1)
virtual void	LanguageChange ()
virtual void	OnLeaveEvent (QEvent arg1)
virtual int	Metric (QPaintDevice.PaintDeviceMetric arg1)
virtual void	OnMoveEvent (QMoveEvent arg1)
virtual void	PaletteChange (QPalette arg1)
new void	ResetInputContext ()
virtual void	OnShowEvent (QShowEvent arg1)
virtual void	StyleChange (QStyle arg1)
virtual void	OnTabletEvent (QTabletEvent arg1)
new void	UpdateMicroFocus ()
virtual void	WindowActivationChange (bool arg1)
Protected Member Functions inherited from QtCore.QObject
	QObject (System.Type dummy)
virtual void	OnChildEvent (QChildEvent arg1)
virtual void	ConnectNotify (string signal)
virtual void	OnCustomEvent (QEvent arg1)
new void	OnDestroyed (QObject arg1=null)
virtual void	DisconnectNotify (string signal)
new int	Receivers (string signal)
new QObject	Sender ()
new int	SenderSignalIndex ()
virtual void	OnTimerEvent (QTimerEvent arg1)

Properties
new QGraphicsScene	Scene [get, set]
new QMatrix	Matrix [get]
new QTransform	Transform [get]
new QBrush	BackgroundBrush [get, set]
new QBrush	ForegroundBrush [get, set]
new bool	Interactive [get, set]
new QRectF	SceneRect [get, set]
new Qt.AlignmentFlag	Alignment [get, set]
new QPainter.RenderHint	RenderHints [get, set]
new DragMode	dragMode [get, set]
new CacheModeFlag	CacheMode [get, set]
new ViewportAnchor	TransformationAnchor [get, set]
new ViewportAnchor	ResizeAnchor [get, set]
new ViewportUpdateMode	viewportUpdateMode [get, set]
new Qt.ItemSelectionMode	RubberBandSelectionMode [get, set]
new OptimizationFlag	OptimizationFlags [get, set]
static new QMetaObject	StaticMetaObject [get]
new IQGraphicsViewSignals	Emit [get]
Properties inherited from QtGui.QAbstractScrollArea
virtual EventHandler < QEventArgs< QEvent > >	ViewportEvent
new QWidget	CornerWidget [get, set]
new QScrollBar	HorizontalScrollBar [get, set]
new QScrollBar	VerticalScrollBar [get, set]
new QWidget	Viewport [get, set]
override EventHandler < QEventArgs< QPaintEvent > >	PaintEvent
override EventHandler < QEventArgs< QActionEvent > >	ActionEvent
override EventHandler < QEventArgs< QEvent > >	ChangeEvent
override EventHandler < QEventArgs< QCloseEvent > >	CloseEvent
override EventHandler < QEventArgs < QContextMenuEvent > >	ContextMenuEvent
override EventHandler < QEventArgs< QDragEnterEvent > >	DragEnterEvent
override EventHandler < QEventArgs< QDragLeaveEvent > >	DragLeaveEvent
override EventHandler < QEventArgs< QDragMoveEvent > >	DragMoveEvent
override EventHandler < QEventArgs< QDropEvent > >	DropEvent
override EventHandler < QEventArgs< QEvent > >	EnterEvent
override EventHandler < QEventArgs< QFocusEvent > >	FocusInEvent
override EventHandler < QEventArgs< QFocusEvent > >	FocusOutEvent
override EventHandler < QEventArgs< QHideEvent > >	HideEvent
override EventHandler < QEventArgs < QInputMethodEvent > >	InputMethodEvent
override EventHandler < QEventArgs< QKeyEvent > >	KeyPressEvent
override EventHandler < QEventArgs< QKeyEvent > >	KeyReleaseEvent
override EventHandler < QEventArgs< QEvent > >	LeaveEvent
override EventHandler < QEventArgs< QMouseEvent > >	MouseDoubleClickEvent
override EventHandler < QEventArgs< QMouseEvent > >	MouseMoveEvent
override EventHandler < QEventArgs< QMouseEvent > >	MousePressEvent
override EventHandler < QEventArgs< QMouseEvent > >	MouseReleaseEvent
override EventHandler < QEventArgs< QMoveEvent > >	MoveEvent
override EventHandler < QEventArgs< QResizeEvent > >	ResizeEvent
override EventHandler < QEventArgs< QShowEvent > >	ShowEvent
override EventHandler < QEventArgs< QTabletEvent > >	TabletEvent
override EventHandler < QEventArgs< QWheelEvent > >	WheelEvent
new Qt.ScrollBarPolicy	VerticalScrollBarPolicy [get, set]
new Qt.ScrollBarPolicy	HorizontalScrollBarPolicy [get, set]
static new QMetaObject	StaticMetaObject [get]
new IQAbstractScrollAreaSignals	Emit [get]
Properties inherited from QtGui.QFrame
new int	FrameStyle [get, set]
new Shape	FrameShape [get, set]
new Shadow	FrameShadow [get, set]
new int	LineWidth [get, set]
new int	MidLineWidth [get, set]
new int	FrameWidth [get]
new QRect	FrameRect [get, set]
static new QMetaObject	StaticMetaObject [get]
new IQFrameSignals	Emit [get]
Properties inherited from QtGui.QWidget
virtual EventHandler < QEventArgs< QActionEvent > >	ActionEvent
virtual EventHandler < QEventArgs< QEvent > >	ChangeEvent
virtual EventHandler < QEventArgs< QCloseEvent > >	CloseEvent
virtual EventHandler < QEventArgs < QContextMenuEvent > >	ContextMenuEvent
virtual EventHandler < QEventArgs< QDragEnterEvent > >	DragEnterEvent
virtual EventHandler < QEventArgs< QDragLeaveEvent > >	DragLeaveEvent
virtual EventHandler < QEventArgs< QDragMoveEvent > >	DragMoveEvent
virtual EventHandler < QEventArgs< QDropEvent > >	DropEvent
virtual EventHandler < QEventArgs< QEvent > >	EnterEvent
virtual EventHandler < QEventArgs< QFocusEvent > >	FocusInEvent
virtual EventHandler < QEventArgs< QFocusEvent > >	FocusOutEvent
virtual EventHandler < QEventArgs< QHideEvent > >	HideEvent
virtual EventHandler < QEventArgs < QInputMethodEvent > >	InputMethodEvent
virtual EventHandler < QEventArgs< QKeyEvent > >	KeyPressEvent
virtual EventHandler < QEventArgs< QKeyEvent > >	KeyReleaseEvent
virtual EventHandler < QEventArgs< QEvent > >	LeaveEvent
virtual EventHandler < QEventArgs< QMouseEvent > >	MouseDoubleClickEvent
virtual EventHandler < QEventArgs< QMouseEvent > >	MouseMoveEvent
virtual EventHandler < QEventArgs< QMouseEvent > >	MousePressEvent
virtual EventHandler < QEventArgs< QMouseEvent > >	MouseReleaseEvent
virtual EventHandler < QEventArgs< QMoveEvent > >	MoveEvent
virtual EventHandler < QEventArgs< QPaintEvent > >	PaintEvent
virtual EventHandler < QEventArgs< QResizeEvent > >	ResizeEvent
virtual EventHandler < QEventArgs< QShowEvent > >	ShowEvent
virtual EventHandler < QEventArgs< QTabletEvent > >	TabletEvent
virtual EventHandler < QEventArgs< QWheelEvent > >	WheelEvent
Slot< QPoint >	CustomContextMenuRequested
new QPalette.ColorRole	BackgroundRole [get, set]
new QMargins	ContentsMargins [get, set]
new QWidget	FocusProxy [get, set]
new QPalette.ColorRole	ForegroundRole [get, set]
new QGraphicsEffect	GraphicsEffect [get, set]
new QInputContext	InputContext [get, set]
new QLayout	Layout [get, set]
new QRegion	Mask [get, set]
new QStyle	Style [get, set]
new Qt.WindowType	WindowFlags [get, set]
new string	WindowRole [get, set]
new Qt.WindowState	WindowState [get, set]
new bool	Modal [get]
new Qt.WindowModality	WindowModality [get, set]
new bool	Enabled [get, set]
new QRect	Geometry [get, set]
new QRect	FrameGeometry [get]
new QRect	NormalGeometry [get]
new int	X [get]
new int	Y [get]
new QPoint	Pos [get, set]
new QSize	FrameSize [get]
new QSize	Size [get, set]
new int	Width [get]
new int	Height [get]
new QRect	Rect [get]
new QRect	ChildrenRect [get]
new QRegion	ChildrenRegion [get]
new QSizePolicy	SizePolicy [get, set]
new QSize	MinimumSize [get, set]
new QSize	MaximumSize [get, set]
new int	MinimumWidth [get, set]
new int	MinimumHeight [get, set]
new int	MaximumWidth [get, set]
new int	MaximumHeight [get, set]
new QSize	SizeIncrement [get, set]
new QSize	BaseSize [get, set]
new QPalette	Palette [get, set]
new QFont	Font [get, set]
new QCursor	Cursor [get, set]
new bool	MouseTracking [get, set]
new bool	IsActiveWindow [get]
new Qt.FocusPolicy	FocusPolicy [get, set]
new bool	Focus [get]
new Qt.ContextMenuPolicy	ContextMenuPolicy [get, set]
new bool	UpdatesEnabled [get, set]
new bool	Visible [get, set]
new bool	Minimized [get]
new bool	Maximized [get]
new bool	FullScreen [get]
new bool	AcceptDrops [get, set]
new string	WindowTitle [get, set]
new QIcon	WindowIcon [get, set]
new string	WindowIconText [get, set]
new double	WindowOpacity [get, set]
new bool	WindowModified [get, set]
new string	ToolTip [get, set]
new string	StatusTip [get, set]
new string	WhatsThis [get, set]
new string	AccessibleName [get, set]
new string	AccessibleDescription [get, set]
new Qt.LayoutDirection	LayoutDirection [get, set]
new bool	AutoFillBackground [get, set]
new string	StyleSheet [get, set]
new QLocale	Locale [get, set]
new string	WindowFilePath [get, set]
new Qt.InputMethodHint	InputMethodHints [get, set]
static new QMetaObject	StaticMetaObject [get]
new ushort	Painters [get, set]
new IQWidgetSignals	Emit [get]
Properties inherited from QtCore.QObject
virtual EventHandler < QEventArgs< QChildEvent > >	ChildEvent
virtual EventHandler < QEventArgs< QEvent > >	CustomEvent
virtual EventHandler < QEventArgs< QEvent > >	Event
virtual EventHandler < QEventArgs< QTimerEvent > >	TimerEvent
Slot< QObject >	DestroyedQObject
Slot	Destroyed
new QObject	Parent [get, set]
virtual System.IntPtr	SmokeObject [get, set]
new string	ObjectName [get, set]
static new QMetaObject	StaticMetaObject [get]
static new QMetaObject	StaticQtMetaObject [get]
new IQObjectSignals	Emit [get]

Additional Inherited Members
Protected Attributes inherited from QtCore.QObject
object	Q_EMIT = null
SmokeInvocation	interceptor
readonly List< QEventHandler >	eventFilters = new List<QEventHandler>()

Detailed Description

The QGraphicsView class provides a widget for displaying the contents of a QGraphicsScene.

QGraphicsView visualizes the contents of a QGraphicsScene in a scrollable viewport. To create a scene with geometrical items, see QGraphicsScene's documentation. QGraphicsView is part of the Graphics View Framework.

To visualize a scene, you start by constructing a QGraphicsView object, passing the address of the scene you want to visualize to QGraphicsView's constructor. Alternatively, you can call setScene() to set the scene at a later point. After you call show(), the view will by default scroll to the center of the scene and display any items that are visible at this point. For example:

QGraphicsScene scene;

scene.addText("Hello, world!");

QGraphicsView view(&scene);

view.show();

You can explicitly scroll to any position on the scene by using the scroll bars, or by calling centerOn(). By passing a point to centerOn(), QGraphicsView will scroll its viewport to ensure that the point is centered in the view. An overload is provided for scrolling to a QGraphicsItem, in which case QGraphicsView will see to that the center of the item is centered in the view. If all you want is to ensure that a certain area is visible, (but not necessarily centered,) you can call ensureVisible() instead.

QGraphicsView can be used to visualize a whole scene, or only parts of it. The visualized area is by default detected automatically when the view is displayed for the first time (by calling QGraphicsScene::itemsBoundingRect()). To set the visualized area rectangle yourself, you can call setSceneRect(). This will adjust the scroll bars' ranges appropriately. Note that although the scene supports a virtually unlimited size, the range of the scroll bars will never exceed the range of an integer (INT_MIN, INT_MAX).

QGraphicsView visualizes the scene by calling render(). By default, the items are drawn onto the viewport by using a regular QPainter, and using default render hints. To change the default render hints that QGraphicsView passes to QPainter when painting items, you can call setRenderHints().

By default, QGraphicsView provides a regular QWidget for the viewport widget. You can access this widget by calling viewport(), or you can replace it by calling setViewport(). To render using OpenGL, simply call setViewport(new QGLWidget). QGraphicsView takes ownership of the viewport widget.

QGraphicsView supports affine transformations, using QTransform. You can either pass a matrix to setTransform(), or you can call one of the convenience functions rotate(), scale(), translate() or shear(). The most two common transformations are scaling, which is used to implement zooming, and rotation. QGraphicsView keeps the center of the view fixed during a transformation. Because of the scene alignment (setAligment()), translating the view will have no visual impact.

You can interact with the items on the scene by using the mouse and keyboard. QGraphicsView translates the mouse and key events into scene events, (events that inherit QGraphicsSceneEvent,), and forward them to the visualized scene. In the end, it's the individual item that handles the events and reacts to them. For example, if you click on a selectable item, the item will typically let the scene know that it has been selected, and it will also redraw itself to display a selection rectangle. Similiary, if you click and drag the mouse to move a movable item, it's the item that handles the mouse moves and moves itself. Item interaction is enabled by default, and you can toggle it by calling setInteractive().

You can also provide your own custom scene interaction, by creating a subclass of QGraphicsView, and reimplementing the mouse and key event handlers. To simplify how you programmatically interact with items in the view, QGraphicsView provides the mapping functions mapToScene() and mapFromScene(), and the item accessors items() and itemAt(). These functions allow you to map points, rectangles, polygons and paths between view coordinates and scene coordinates, and to find items on the scene using view coordinates.

See also QGraphicsScene, QGraphicsItem, and QGraphicsSceneEvent.

Member Enumeration Documentation

enum QtGui.QGraphicsView.CacheModeFlag

This enum describes the flags that you can set for a QGraphicsView's cache mode.

See also cacheMode.

Enumerator:

CacheBackground	The background is cached. This affects both custom backgrounds, and backgrounds based on the backgroundBrush property. When this flag is enabled, QGraphicsView will allocate one pixmap with the full size of the viewport.
CacheNone	All painting is done directly onto the viewport.

enum QtGui.QGraphicsView.DragMode

This enum describes the default action for the view when pressing and dragging the mouse over the viewport.

See also dragMode and QGraphicsScene::setSelectionArea().

Enumerator:

NoDrag	Nothing happens; the mouse event is ignored.
RubberBandDrag	A rubber band will appear. Dragging the mouse will set the rubber band geometry, and all items covered by the rubber band are selected. This mode is disabled for non-interactive views.
ScrollHandDrag	The cursor changes into a pointing hand, and dragging the mouse around will scroll the scrolbars. This mode works both in interactive and non-interactive mode.

enum QtGui.QGraphicsView.OptimizationFlag

This enum describes flags that you can enable to improve rendering performance in QGraphicsView. By default, none of these flags are set. Note that setting a flag usually imposes a side effect, and this effect can vary between paint devices and platforms.

This enum was introduced or modified in Qt 4.3.

Enumerator:

DontAdjustForAntialiasing	Disables QGraphicsView's antialiasing auto-adjustment of exposed areas. Items that render antialiased lines on the boundaries of their QGraphicsItem::boundingRect() can end up rendering parts of the line outside. To prevent rendering artifacts, QGraphicsView expands all exposed regions by 2 pixels in all directions. If you enable this flag, QGraphicsView will no longer perform these adjustments, minimizing the areas that require redrawing, which improves performance. A common side effect is that items that do draw with antialiasing can leave painting traces behind on the scene as they are moved.
DontClipPainter	This value is obsolete and has no effect.
DontSavePainterState	When rendering, QGraphicsView protects the painter state (see QPainter::save()) when rendering the background or foreground, and when rendering each item. This allows you to leave the painter in an altered state (i.e., you can call QPainter::setPen() or QPainter::setBrush() without restoring the state after painting). However, if the items consistently do restore the state, you should enable this flag to prevent QGraphicsView from doing the same.
IndirectPainting	Since Qt 4.6, restore the old painting algorithm that calls QGraphicsView::drawItems() and QGraphicsScene::drawItems(). To be used only for compatibility with old code.

enum QtGui.QGraphicsView.ViewportAnchor

This enums describe the possible anchors that QGraphicsView can use when the user resizes the view or when the view is transformed.

See also resizeAnchor and transformationAnchor.

Enumerator:

AnchorUnderMouse	The point under the mouse is used as the anchor.
AnchorViewCenter	The scene point at the center of the view is used as the anchor.
NoAnchor	No anchor, i.e. the view leaves the scene's position unchanged.

enum QtGui.QGraphicsView.ViewportUpdateMode

This enum describes how QGraphicsView updates its viewport when the scene contents change or are exposed.

This enum was introduced or modified in Qt 4.3.

See also viewportUpdateMode.

Enumerator:

BoundingRectViewportUpdate	The bounding rectangle of all changes in the viewport will be redrawn. This mode has the advantage that QGraphicsView searches only one region for changes, minimizing time spent determining what needs redrawing. The disadvantage is that areas that have not changed also need to be redrawn.
FullViewportUpdate	When any visible part of the scene changes or is reexposed, QGraphicsView will update the entire viewport. This approach is fastest when QGraphicsView spends more time figuring out what to draw than it would spend drawing (e.g., when very many small items are repeatedly updated). This is the preferred update mode for viewports that do not support partial updates, such as QGLWidget, and for viewports that need to disable scroll optimization.
MinimalViewportUpdate	QGraphicsView will determine the minimal viewport region that requires a redraw, minimizing the time spent drawing by avoiding a redraw of areas that have not changed. This is QGraphicsView's default mode. Although this approach provides the best performance in general, if there are many small visible changes on the scene, QGraphicsView might end up spending more time finding the minimal approach than it will spend drawing.
NoViewportUpdate	QGraphicsView will never update its viewport when the scene changes; the user is expected to control all updates. This mode disables all (potentially slow) item visibility testing in QGraphicsView, and is suitable for scenes that either require a fixed frame rate, or where the viewport is otherwise updated externally.
SmartViewportUpdate	QGraphicsView will attempt to find an optimal update mode by analyzing the areas that require a redraw.

Constructor & Destructor Documentation

QtGui.QGraphicsView.QGraphicsView ( System.Type  dummy )

protected

QtGui.QGraphicsView.QGraphicsView

(

QWidget

parent = null

)

Constructs a QGraphicsView. parent is passed to QWidget's constructor.

QtGui.QGraphicsView.QGraphicsView	(	QGraphicsScene	scene,
		QWidget	parent = null
	)

Constructs a QGraphicsView and sets the visualized scene to scene. parent is passed to QWidget's constructor.

Member Function Documentation

new Qt.AlignmentFlag QtGui.QGraphicsView.alignment

(

)

new QGraphicsView.CacheModeFlag QtGui.QGraphicsView.cacheMode

(

)

new void QtGui.QGraphicsView.CenterOn

(

QPointF

pos

)

Scrolls the contents of the viewport to ensure that the scene coordinate pos, is centered in the view.

Because pos is a floating point coordinate, and the scroll bars operate on integer coordinates, the centering is only an approximation.

Note: If the item is close to or outside the border, it will be visible in the view, but not centered.

See also ensureVisible().

new void QtGui.QGraphicsView.CenterOn

(

IQGraphicsItem

item

)

This is an overloaded function.

Scrolls the contents of the viewport to ensure that item is centered in the view.

See also ensureVisible().

new void QtGui.QGraphicsView.CenterOn	(	double	x,
		double	y
	)

Scrolls the contents of the viewport to ensure that the scene coordinate pos, is centered in the view.

Because pos is a floating point coordinate, and the scroll bars operate on integer coordinates, the centering is only an approximation.

Note: If the item is close to or outside the border, it will be visible in the view, but not centered.

See also ensureVisible().

override void QtGui.QGraphicsView.CreateProxy ( )

virtual

Reimplemented from QtGui.QAbstractScrollArea.

new void QtGui.QGraphicsView.Dispose

(

)

virtual void QtGui.QGraphicsView.DrawBackground ( QPainter  painter, QRectF  rect  )

protectedvirtual

Draws the background of the scene using painter, before any items and the foreground are drawn. Reimplement this function to provide a custom background for this view.

If all you want is to define a color, texture or gradient for the background, you can call setBackgroundBrush() instead.

All painting is done in scene coordinates. rect is the exposed rectangle.

The default implementation fills rect using the view's backgroundBrush. If no such brush is defined (the default), the scene's drawBackground() function is called instead.

See also drawForeground() and QGraphicsScene::drawBackground().

virtual void QtGui.QGraphicsView.DrawForeground ( QPainter  painter, QRectF  rect  )

protectedvirtual

Draws the foreground of the scene using painter, after the background and all items are drawn. Reimplement this function to provide a custom foreground for this view.

If all you want is to define a color, texture or gradient for the foreground, you can call setForegroundBrush() instead.

All painting is done in scene coordinates. rect is the exposed rectangle.

The default implementation fills rect using the view's foregroundBrush. If no such brush is defined (the default), the scene's drawForeground() function is called instead.

See also drawBackground() and QGraphicsScene::drawForeground().

virtual void QtGui.QGraphicsView.DrawItems ( QPainter  painter, int  numItems, IQGraphicsItem  items, QStyleOptionGraphicsItem  options  )

protectedvirtual

Draws the items items in the scene using painter, after the background and before the foreground are drawn. numItems is the number of items in items and options in options. options is a list of styleoptions; one for each item. Reimplement this function to provide custom item drawing for this view.

The default implementation calls the scene's drawItems() function.

Since Qt 4.6, this function is not called anymore unless the QGraphicsView::IndirectPainting flag is given as an Optimization flag.

See also drawForeground(), drawBackground(), and QGraphicsScene::drawItems().

new void QtGui.QGraphicsView.EnsureVisible	(	QRectF	rect,
		int	xmargin = 50,
		int	ymargin = 50
	)

Scrolls the contents of the viewport so that the scene rectangle rect is visible, with margins specified in pixels by xmargin and ymargin. If the specified rect cannot be reached, the contents are scrolled to the nearest valid position. The default value for both margins is 50 pixels.

See also centerOn().

new void QtGui.QGraphicsView.EnsureVisible	(	IQGraphicsItem	item,
		int	xmargin = 50,
		int	ymargin = 50
	)

This is an overloaded function.

Scrolls the contents of the viewport so that the center of item item is visible, with margins specified in pixels by xmargin and ymargin. If the specified point cannot be reached, the contents are scrolled to the nearest valid position. The default value for both margins is 50 pixels.

See also centerOn().

new void QtGui.QGraphicsView.EnsureVisible	(	double	x,
		double	y,
		double	w,
		double	h,
		int	xmargin = 50,
		int	ymargin = 50
	)

Scrolls the contents of the viewport so that the scene rectangle rect is visible, with margins specified in pixels by xmargin and ymargin. If the specified rect cannot be reached, the contents are scrolled to the nearest valid position. The default value for both margins is 50 pixels.

See also centerOn().

new void QtGui.QGraphicsView.FitInView	(	QRectF	rect,
		Qt.AspectRatioMode	aspectRadioMode = Qt.AspectRatioMode.IgnoreAspectRatio
	)

Scales the view matrix and scrolls the scroll bars to ensure that the scene rectangle rect fits inside the viewport. rect must be inside the scene rect; otherwise, fitInView() cannot guarantee that the whole rect is visible.

This function keeps the view's rotation, translation, or shear. The view is scaled according to aspectRatioMode. rect will be centered in the view if it does not fit tightly.

It's common to call fitInView() from inside a reimplementation of resizeEvent(), to ensure that the whole scene, or parts of the scene, scales automatically to fit the new size of the viewport as the view is resized. Note though, that calling fitInView() from inside resizeEvent() can lead to unwanted resize recursion, if the new transformation toggles the automatic state of the scrollbars. You can toggle the scrollbar policies to always on or always off to prevent this (see horizontalScrollBarPolicy() and verticalScrollBarPolicy()).

If rect is empty, or if the viewport is too small, this function will do nothing.

See also setTransform(), ensureVisible(), and centerOn().

new void QtGui.QGraphicsView.FitInView	(	IQGraphicsItem	item,
		Qt.AspectRatioMode	aspectRadioMode = Qt.AspectRatioMode.IgnoreAspectRatio
	)

Scales the view matrix and scrolls the scroll bars to ensure that the scene rectangle rect fits inside the viewport. rect must be inside the scene rect; otherwise, fitInView() cannot guarantee that the whole rect is visible.

This function keeps the view's rotation, translation, or shear. The view is scaled according to aspectRatioMode. rect will be centered in the view if it does not fit tightly.

It's common to call fitInView() from inside a reimplementation of resizeEvent(), to ensure that the whole scene, or parts of the scene, scales automatically to fit the new size of the viewport as the view is resized. Note though, that calling fitInView() from inside resizeEvent() can lead to unwanted resize recursion, if the new transformation toggles the automatic state of the scrollbars. You can toggle the scrollbar policies to always on or always off to prevent this (see horizontalScrollBarPolicy() and verticalScrollBarPolicy()).

If rect is empty, or if the viewport is too small, this function will do nothing.

See also setTransform(), ensureVisible(), and centerOn().

new void QtGui.QGraphicsView.FitInView	(	double	x,
		double	y,
		double	w,
		double	h,
		Qt.AspectRatioMode	aspectRadioMode = Qt.AspectRatioMode.IgnoreAspectRatio
	)

Scales the view matrix and scrolls the scroll bars to ensure that the scene rectangle rect fits inside the viewport. rect must be inside the scene rect; otherwise, fitInView() cannot guarantee that the whole rect is visible.

This function keeps the view's rotation, translation, or shear. The view is scaled according to aspectRatioMode. rect will be centered in the view if it does not fit tightly.

It's common to call fitInView() from inside a reimplementation of resizeEvent(), to ensure that the whole scene, or parts of the scene, scales automatically to fit the new size of the viewport as the view is resized. Note though, that calling fitInView() from inside resizeEvent() can lead to unwanted resize recursion, if the new transformation toggles the automatic state of the scrollbars. You can toggle the scrollbar policies to always on or always off to prevent this (see horizontalScrollBarPolicy() and verticalScrollBarPolicy()).

If rect is empty, or if the viewport is too small, this function will do nothing.

See also setTransform(), ensureVisible(), and centerOn().

override bool QtGui.QGraphicsView.FocusNextPrevChild ( bool  next )

protectedvirtual

Reimplemented from QWidget::focusNextPrevChild().

Reimplemented from QtGui.QWidget.

override object QtGui.QGraphicsView.InputMethodQuery ( Qt.InputMethodQuery  query )

virtual

Reimplemented from QWidget::inputMethodQuery().

Reimplemented from QtGui.QWidget.

new void QtGui.QGraphicsView.InvalidateScene

(

)

Invalidates and schedules a redraw of layers inside rect. rect is in scene coordinates. Any cached content for layers inside rect is unconditionally invalidated and redrawn.

You can call this function to notify QGraphicsView of changes to the background or the foreground of the scene. It is commonly used for scenes with tile-based backgrounds to notify changes when QGraphicsView has enabled background caching.

Note that QGraphicsView currently supports background caching only (see QGraphicsView::CacheBackground). This function is equivalent to calling update() if any layer but QGraphicsScene::BackgroundLayer is passed.

See also QGraphicsScene::invalidate() and update().

new void QtGui.QGraphicsView.InvalidateScene	(	QRectF	rect,
		QGraphicsScene.SceneLayer	layers = QGraphicsScene.SceneLayer.AllLayers
	)

Invalidates and schedules a redraw of layers inside rect. rect is in scene coordinates. Any cached content for layers inside rect is unconditionally invalidated and redrawn.

You can call this function to notify QGraphicsView of changes to the background or the foreground of the scene. It is commonly used for scenes with tile-based backgrounds to notify changes when QGraphicsView has enabled background caching.

Note that QGraphicsView currently supports background caching only (see QGraphicsView::CacheBackground). This function is equivalent to calling update() if any layer but QGraphicsScene::BackgroundLayer is passed.

See also QGraphicsScene::invalidate() and update().

new bool QtGui.QGraphicsView.IsTransformed

(

)

Returns true if the view is transformed (i.e., a non-identity transform has been assigned, or the scrollbars are adjusted).

This function was introduced in Qt 4.6.

See also setTransform(), horizontalScrollBar(), and verticalScrollBar().

new IQGraphicsItem QtGui.QGraphicsView.ItemAt

(

QPoint

pos

)

Returns the item at position pos, which is in viewport coordinates. If there are several items at this position, this function returns the topmost item.

Example:

void CustomView::mousePressEvent(QMouseEvent *event)

{

if (QGraphicsItem *item = itemAt(event->pos())) {

qDebug() << "You clicked on item" << item;

} else {

qDebug() << "You didn't click on an item.";

}

}

See also items() and Sorting.

new IQGraphicsItem QtGui.QGraphicsView.ItemAt	(	int	x,
		int	y
	)

This is an overloaded function.

This function is provided for convenience. It's equivalent to calling itemAt(QPoint(x, y)).

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items

(

)

Returns a list of all the items in the associated scene, in descending stacking order (i.e., the first item in the returned list is the uppermost item).

See also QGraphicsScene::items() and Sorting.

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items

(

QPoint

pos

)

Returns a list of all the items at the position pos in the view. The items are listed in descending stacking order (i.e., the first item in the list is the uppermost item, and the last item is the lowermost item). pos is in viewport coordinates.

This function is most commonly called from within mouse event handlers in a subclass in QGraphicsView. pos is in untransformed viewport coordinates, just like QMouseEvent::pos().

void CustomView::mousePressEvent(QMouseEvent *event)

{

qDebug() << "There are" << items(event->pos()).size()

<< "items at position" << mapToScene(event->pos());

}

See also QGraphicsScene::items() and Sorting.

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items	(	QRect	rect,
		Qt.ItemSelectionMode	mode = Qt.ItemSelectionMode.IntersectsItemShape
	)

Returns a list of all the items in the associated scene, in descending stacking order (i.e., the first item in the returned list is the uppermost item).

See also QGraphicsScene::items() and Sorting.

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items	(	QPolygon	polygon,
		Qt.ItemSelectionMode	mode = Qt.ItemSelectionMode.IntersectsItemShape
	)

Returns a list of all the items in the associated scene, in descending stacking order (i.e., the first item in the returned list is the uppermost item).

See also QGraphicsScene::items() and Sorting.

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items	(	QPainterPath	path,
		Qt.ItemSelectionMode	mode = Qt.ItemSelectionMode.IntersectsItemShape
	)

Returns a list of all the items in the associated scene, in descending stacking order (i.e., the first item in the returned list is the uppermost item).

See also QGraphicsScene::items() and Sorting.

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items	(	int	x,
		int	y
	)

This function is provided for convenience. It's equivalent to calling items(QPoint(x, y)).

new System.Collections.Generic.List<IQGraphicsItem> QtGui.QGraphicsView.Items	(	int	x,
		int	y,
		int	w,
		int	h,
		Qt.ItemSelectionMode	mode = Qt.ItemSelectionMode.IntersectsItemShape
	)

Returns a list of all the items in the associated scene, in descending stacking order (i.e., the first item in the returned list is the uppermost item).

See also QGraphicsScene::items() and Sorting.

new QPoint QtGui.QGraphicsView.MapFromScene

(

QPointF

point

)

Returns the scene coordinate point to viewport coordinates.

See also mapToScene().

new QPolygon QtGui.QGraphicsView.MapFromScene

(

QRectF

rect

)

Returns the scene rectangle rect to a viewport coordinate polygon.

See also mapToScene().

new QPolygon QtGui.QGraphicsView.MapFromScene

(

QPolygonF

polygon

)

Returns the scene coordinate polygon polygon to a viewport coordinate polygon.

See also mapToScene().

new QPainterPath QtGui.QGraphicsView.MapFromScene

(

QPainterPath

path

)

Returns the scene coordinate painter path path to a viewport coordinate painter path.

See also mapToScene().

new QPoint QtGui.QGraphicsView.MapFromScene	(	double	x,
		double	y
	)

Returns the scene coordinate point to viewport coordinates.

See also mapToScene().

new QPolygon QtGui.QGraphicsView.MapFromScene	(	double	x,
		double	y,
		double	w,
		double	h
	)

Returns the scene coordinate point to viewport coordinates.

See also mapToScene().

new QPointF QtGui.QGraphicsView.MapToScene

(

QPoint

point

)

Returns the viewport coordinate point mapped to scene coordinates.

Note: It can be useful to map the whole rectangle covered by the pixel at point instead of the point itself. To do this, you can call mapToScene(QRect(point, QSize(2, 2))).

See also mapFromScene().

new QPolygonF QtGui.QGraphicsView.MapToScene

(

QRect

rect

)

Returns the viewport rectangle rect mapped to a scene coordinate polygon.

See also mapFromScene().

new QPolygonF QtGui.QGraphicsView.MapToScene

(

QPolygon

polygon

)

Returns the viewport polygon polygon mapped to a scene coordinate polygon.

See also mapFromScene().

new QPainterPath QtGui.QGraphicsView.MapToScene

(

QPainterPath

path

)

Returns the viewport painter path path mapped to a scene coordinate painter path.

See also mapFromScene().

new QPointF QtGui.QGraphicsView.MapToScene	(	int	x,
		int	y
	)

This function is provided for convenience. It's equivalent to calling mapToScene(QPoint(x, y)).

new QPolygonF QtGui.QGraphicsView.MapToScene	(	int	x,
		int	y,
		int	w,
		int	h
	)

This function is provided for convenience. It's equivalent to calling mapToScene(QRect(x, y, w, h)).

override void QtGui.QGraphicsView.OnContextMenuEvent ( QContextMenuEvent @  event )

protected

Reimplemented from QWidget::contextMenuEvent().

override void QtGui.QGraphicsView.OnDragEnterEvent ( QDragEnterEvent @  event )

protected

Reimplemented from QWidget::dragEnterEvent().

override void QtGui.QGraphicsView.OnDragLeaveEvent ( QDragLeaveEvent @  event )

protected

Reimplemented from QWidget::dragLeaveEvent().

override void QtGui.QGraphicsView.OnDragMoveEvent ( QDragMoveEvent @  event )

protected

Reimplemented from QWidget::dragMoveEvent().

override void QtGui.QGraphicsView.OnDropEvent ( QDropEvent @  event )

protected

Reimplemented from QWidget::dropEvent().

override bool QtGui.QGraphicsView.OnEvent

(

QEvent @

event

)

Reimplemented from QObject::event().

override void QtGui.QGraphicsView.OnFocusInEvent ( QFocusEvent @  event )

protected

Reimplemented from QWidget::focusInEvent().

override void QtGui.QGraphicsView.OnFocusOutEvent ( QFocusEvent @  event )

protected

Reimplemented from QWidget::focusOutEvent().

override void QtGui.QGraphicsView.OnInputMethodEvent ( QInputMethodEvent @  event )

protected

Reimplemented from QWidget::inputMethodEvent().

override void QtGui.QGraphicsView.OnKeyPressEvent ( QKeyEvent @  event )

protected

Reimplemented from QWidget::keyPressEvent().

override void QtGui.QGraphicsView.OnKeyReleaseEvent ( QKeyEvent @  event )

protected

Reimplemented from QWidget::keyReleaseEvent().

override void QtGui.QGraphicsView.OnMouseDoubleClickEvent ( QMouseEvent @  event )

protected

Reimplemented from QWidget::mouseDoubleClickEvent().

override void QtGui.QGraphicsView.OnMouseMoveEvent ( QMouseEvent @  event )

protected

Reimplemented from QWidget::mouseMoveEvent().

override void QtGui.QGraphicsView.OnMousePressEvent ( QMouseEvent @  event )

protected

Reimplemented from QWidget::mousePressEvent().

override void QtGui.QGraphicsView.OnMouseReleaseEvent ( QMouseEvent @  event )

protected

Reimplemented from QWidget::mouseReleaseEvent().

override void QtGui.QGraphicsView.OnPaintEvent ( QPaintEvent @  event )

protected

Reimplemented from QWidget::paintEvent().

override void QtGui.QGraphicsView.OnResizeEvent ( QResizeEvent @  event )

protected

Reimplemented from QWidget::resizeEvent().

override void QtGui.QGraphicsView.OnShowEvent ( QShowEvent @  event )

protected

Reimplemented from QWidget::showEvent().

override bool QtGui.QGraphicsView.OnViewportEvent ( QEvent @  event )

protected

Reimplemented from QAbstractScrollArea::viewportEvent().

override void QtGui.QGraphicsView.OnWheelEvent ( QWheelEvent @  event )

protected

Reimplemented from QWidget::wheelEvent().

new QGraphicsView.OptimizationFlag QtGui.QGraphicsView.optimizationFlags

(

)

new void QtGui.QGraphicsView.Render

(

QPainter

painter

)

Renders the source rect, which is in view coordinates, from the scene into target, which is in paint device coordinates, using painter. This function is useful for capturing the contents of the view onto a paint device, such as a QImage (e.g., to take a screenshot), or for printing to QPrinter. For example:

QGraphicsScene scene;

scene.addItem(...

...

QGraphicsView view(&scene);

view.show();

...

QPrinter printer(QPrinter::HighResolution);

printer.setPageSize(QPrinter::A4);

QPainter painter(&printer);

// print, fitting the viewport contents into a full page

view.render(&painter);

// print the upper half of the viewport into the lower.

// half of the page.

QRect viewport = view.viewport()->rect();

view.render(&painter,

QRectF(0, printer.height() / 2,

printer.width(), printer.height() / 2),

viewport.adjusted(0, 0, 0, -viewport.height() / 2));

If source is a null rect, this function will use viewport()->rect() to determine what to draw. If target is a null rect, the full dimensions of painter's paint device (e.g., for a QPrinter, the page size) will be used.

The source rect contents will be transformed according to aspectRatioMode to fit into the target rect. By default, the aspect ratio is kept, and source is scaled to fit in target.

See also QGraphicsScene::render().

new void QtGui.QGraphicsView.Render	(	QPainter	painter,
		QRectF	target
	)

Renders the source rect, which is in view coordinates, from the scene into target, which is in paint device coordinates, using painter. This function is useful for capturing the contents of the view onto a paint device, such as a QImage (e.g., to take a screenshot), or for printing to QPrinter. For example:

QGraphicsScene scene;

scene.addItem(...

...

QGraphicsView view(&scene);

view.show();

...

QPrinter printer(QPrinter::HighResolution);

printer.setPageSize(QPrinter::A4);

QPainter painter(&printer);

// print, fitting the viewport contents into a full page

view.render(&painter);

// print the upper half of the viewport into the lower.

// half of the page.

QRect viewport = view.viewport()->rect();

view.render(&painter,

QRectF(0, printer.height() / 2,

printer.width(), printer.height() / 2),

viewport.adjusted(0, 0, 0, -viewport.height() / 2));

If source is a null rect, this function will use viewport()->rect() to determine what to draw. If target is a null rect, the full dimensions of painter's paint device (e.g., for a QPrinter, the page size) will be used.

The source rect contents will be transformed according to aspectRatioMode to fit into the target rect. By default, the aspect ratio is kept, and source is scaled to fit in target.

See also QGraphicsScene::render().

new void QtGui.QGraphicsView.Render	(	QPainter	painter,
		QRectF	target,
		QRect	source,
		Qt.AspectRatioMode	aspectRatioMode = Qt.AspectRatioMode.KeepAspectRatio
	)

Renders the source rect, which is in view coordinates, from the scene into target, which is in paint device coordinates, using painter. This function is useful for capturing the contents of the view onto a paint device, such as a QImage (e.g., to take a screenshot), or for printing to QPrinter. For example:

QGraphicsScene scene;

scene.addItem(...

...

QGraphicsView view(&scene);

view.show();

...

QPrinter printer(QPrinter::HighResolution);

printer.setPageSize(QPrinter::A4);

QPainter painter(&printer);

// print, fitting the viewport contents into a full page

view.render(&painter);

// print the upper half of the viewport into the lower.

// half of the page.

QRect viewport = view.viewport()->rect();

view.render(&painter,

QRectF(0, printer.height() / 2,

printer.width(), printer.height() / 2),

viewport.adjusted(0, 0, 0, -viewport.height() / 2));

If source is a null rect, this function will use viewport()->rect() to determine what to draw. If target is a null rect, the full dimensions of painter's paint device (e.g., for a QPrinter, the page size) will be used.

The source rect contents will be transformed according to aspectRatioMode to fit into the target rect. By default, the aspect ratio is kept, and source is scaled to fit in target.

See also QGraphicsScene::render().

new QPainter.RenderHint QtGui.QGraphicsView.renderHints

(

)

new void QtGui.QGraphicsView.ResetCachedContent

(

)

Resets any cached content. Calling this function will clear QGraphicsView's cache. If the current cache mode is CacheNone, this function does nothing.

This function is called automatically for you when the backgroundBrush or QGraphicsScene::backgroundBrush properties change; you only need to call this function if you have reimplemented QGraphicsScene::drawBackground() or QGraphicsView::drawBackground() to draw a custom background, and need to trigger a full redraw.

See also cacheMode().

new void QtGui.QGraphicsView.ResetMatrix

(

)

Resets the view transformation matrix to the identity matrix.

See also resetTransform().

new void QtGui.QGraphicsView.ResetTransform

(

)

Resets the view transformation to the identity matrix.

See also transform() and setTransform().

new void QtGui.QGraphicsView.Rotate

(

double

angle

)

Rotates the current view transformation angle degrees clockwise.

See also setTransform(), transform(), scale(), shear(), and translate().

new void QtGui.QGraphicsView.Scale	(	double	sx,
		double	sy
	)

Scales the current view transformation by (sx, sy).

See also setTransform(), transform(), rotate(), shear(), and translate().

override void QtGui.QGraphicsView.ScrollContentsBy ( int  dx, int  dy  )

protectedvirtual

Reimplemented from QAbstractScrollArea::scrollContentsBy().

Reimplemented from QtGui.QAbstractScrollArea.

new void QtGui.QGraphicsView.SetAlignment

(

Qt.AlignmentFlag

alignment

)

new void QtGui.QGraphicsView.SetCacheMode

(

QGraphicsView.CacheModeFlag

mode

)

new void QtGui.QGraphicsView.SetMatrix	(	QMatrix	matrix,
		bool	combine = false
	)

Sets the view's current transformation matrix to matrix.

If combine is true, then matrix is combined with the current matrix; otherwise, matrix replaces the current matrix. combine is false by default.

The transformation matrix tranforms the scene into view coordinates. Using the default transformation, provided by the identity matrix, one pixel in the view represents one unit in the scene (e.g., a 10x10 rectangular item is drawn using 10x10 pixels in the view). If a 2x2 scaling matrix is applied, the scene will be drawn in 1:2 (e.g., a 10x10 rectangular item is then drawn using 20x20 pixels in the view).

Example:

QGraphicsScene scene;

scene.addText("GraphicsView rotated clockwise");

QGraphicsView view(&scene);

view.rotate(90); // the text is rendered with a 90 degree clockwise rotation

view.show();

To simplify interation with items using a transformed view, QGraphicsView provides mapTo... and mapFrom... functions that can translate between scene and view coordinates. For example, you can call mapToScene() to map a view coordinate to a floating point scene coordinate, or mapFromScene() to map from floating point scene coordinates to view coordinates.

See also matrix(), setTransform(), rotate(), scale(), shear(), and translate().

new void QtGui.QGraphicsView.SetOptimizationFlag	(	QGraphicsView.OptimizationFlag	flag,
		bool	enabled = true
	)

Enables flag if enabled is true; otherwise disables flag.

See also optimizationFlags.

new void QtGui.QGraphicsView.SetOptimizationFlags

(

QGraphicsView.OptimizationFlag

flags

)

new void QtGui.QGraphicsView.SetRenderHint	(	QPainter.RenderHint	hint,
		bool	enabled = true
	)

If enabled is true, the render hint hint is enabled; otherwise it is disabled.

See also renderHints.

new void QtGui.QGraphicsView.SetRenderHints

(

QPainter.RenderHint

hints

)

new void QtGui.QGraphicsView.SetSceneRect	(	double	x,
		double	y,
		double	w,
		double	h
	)

new void QtGui.QGraphicsView.SetTransform	(	QTransform	matrix,
		bool	combine = false
	)

Sets the view's current transformation matrix to matrix.

If combine is true, then matrix is combined with the current matrix; otherwise, matrix replaces the current matrix. combine is false by default.

The transformation matrix tranforms the scene into view coordinates. Using the default transformation, provided by the identity matrix, one pixel in the view represents one unit in the scene (e.g., a 10x10 rectangular item is drawn using 10x10 pixels in the view). If a 2x2 scaling matrix is applied, the scene will be drawn in 1:2 (e.g., a 10x10 rectangular item is then drawn using 20x20 pixels in the view).

Example:

QGraphicsScene scene;

scene.addText("GraphicsView rotated clockwise");

QGraphicsView view(&scene);

view.rotate(90); // the text is rendered with a 90 degree clockwise rotation

view.show();

To simplify interation with items using a transformed view, QGraphicsView provides mapTo... and mapFrom... functions that can translate between scene and view coordinates. For example, you can call mapToScene() to map a view coordiate to a floating point scene coordinate, or mapFromScene() to map from floating point scene coordinates to view coordinates.

See also transform(), rotate(), scale(), shear(), and translate().

new void QtGui.QGraphicsView.SetupViewport ( QWidget  widget )

protected

This slot is called by QAbstractScrollArea after setViewport() has been called. Reimplement this function in a subclass of QGraphicsView to initialize the new viewport widget before it is used.

See also setViewport().

new void QtGui.QGraphicsView.Shear	(	double	sh,
		double	sv
	)

Shears the current view transformation by (sh, sv).

See also setTransform(), transform(), rotate(), scale(), and translate().

override QSize QtGui.QGraphicsView.SizeHint ( )

virtual

Reimplemented from QWidget::sizeHint().

Reimplemented from QtGui.QAbstractScrollArea.

static string QtGui.QGraphicsView.Tr ( string  s, string  c = null  )

static

static string QtGui.QGraphicsView.Tr ( string  s, string  c, int  n  )

static

new void QtGui.QGraphicsView.Translate	(	double	dx,
		double	dy
	)

Translates the current view transformation by (dx, dy).

See also setTransform(), transform(), rotate(), and shear().

static string QtGui.QGraphicsView.TrUtf8 ( string  s, string  c = null  )

static

static string QtGui.QGraphicsView.TrUtf8 ( string  s, string  c, int  n  )

static

new void QtGui.QGraphicsView.UpdateScene

(

System.Collections.Generic.List< QRectF >

rects

)

Schedules an update of the scene rectangles rects.

See also QGraphicsScene::changed().

new void QtGui.QGraphicsView.UpdateSceneRect

(

QRectF

rect

)

Notifies QGraphicsView that the scene's scene rect has changed. rect is the new scene rect. If the view already has an explicitly set scene rect, this function does nothing.

See also sceneRect and QGraphicsScene::sceneRectChanged().

new QTransform QtGui.QGraphicsView.ViewportTransform

(

)

Returns a matrix that maps viewport coordinates to scene coordinates.

See also mapToScene() and mapFromScene().

Property Documentation

new Qt.AlignmentFlag QtGui.QGraphicsView.Alignment

getset

This property holds the alignment of the scene in the view when the whole scene is visible.

If the whole scene is visible in the view, (i.e., there are no visible scroll bars,) the view's alignment will decide where the scene will be rendered in the view. For example, if the alignment is Qt::AlignCenter, which is default, the scene will be centered in the view, and if the alignment is (Qt::AlignLeft | Qt::AlignTop), the scene will be rendered in the top-left corner of the view.

new QBrush QtGui.QGraphicsView.BackgroundBrush

getset

This property holds the background brush of the scene.

This property sets the background brush for the scene in this view. It is used to override the scene's own background, and defines the behavior of drawBackground(). To provide custom background drawing for this view, you can reimplement drawBackground() instead.

By default, this property contains a brush with the Qt::NoBrush pattern.

new CacheModeFlag QtGui.QGraphicsView.CacheMode

getset

This property holds which parts of the view are cached.

QGraphicsView can cache pre-rendered content in a QPixmap, which is then drawn onto the viewport. The purpose of such caching is to speed up the total rendering time for areas that are slow to render. Texture, gradient and alpha blended backgrounds, for example, can be notibly slow to render; especially with a transformed view. The CacheBackground flag enables caching of the view's background. For example:

QGraphicsView view;

view.setBackgroundBrush(QImage(":/images/backgroundtile.png"));

view.setCacheMode(QGraphicsView::CacheBackground);

The cache is invalidated every time the view is transformed. However, when scrolling, only partial invalidation is required.

By default, nothing is cached.

new DragMode QtGui.QGraphicsView.dragMode

getset

This property holds the behavior for dragging the mouse over the scene while the left mouse button is pressed.

This property defines what should happen when the user clicks on the scene background and drags the mouse (e.g., scrolling the viewport contents using a pointing hand cursor, or selecting multiple items with a rubber band). The default value, NoDrag, does nothing.

This behavior only affects mouse clicks that are not handled by any item. You can define a custom behavior by creating a subclass of QGraphicsView and reimplementing mouseMoveEvent().

new IQGraphicsViewSignals QtGui.QGraphicsView.Emit

getprotected

new QBrush QtGui.QGraphicsView.ForegroundBrush

getset

This property holds the foreground brush of the scene.

This property sets the foreground brush for the scene in this view. It is used to override the scene's own foreground, and defines the behavior of drawForeground(). To provide custom foreground drawing for this view, you can reimplement drawForeground() instead.

By default, this property contains a brush with the Qt::NoBrush pattern.

new bool QtGui.QGraphicsView.Interactive

getset

This property holds whether the view allowed scene interaction.

If enabled, this view is set to allow scene interaction. Otherwise, this view will not allow interaction, and any mouse or key events are ignored (i.e., it will act as a read-only view).

By default, this property is true.

new QMatrix QtGui.QGraphicsView.Matrix

get

Returns the current transformation matrix for the view. If no current transformation is set, the identity matrix is returned.

See also setMatrix(), transform(), rotate(), scale(), shear(), and translate().

new OptimizationFlag QtGui.QGraphicsView.OptimizationFlags

getset

This property holds flags that can be used to tune QGraphicsView's performance.

QGraphicsView uses clipping, extra bounding rect adjustments, and certain other aids to improve rendering quality and performance for the common case graphics scene. However, depending on the target platform, the scene, and the viewport in use, some of these operations can degrade performance.

The effect varies from flag to flag; see the OptimizationFlags documentation for details.

By default, no optimization flags are enabled.

This property was introduced in Qt 4.3.

new QPainter.RenderHint QtGui.QGraphicsView.RenderHints

getset

This property holds the default render hints for the view.

These hints are used to initialize QPainter before each visible item is drawn. QPainter uses render hints to toggle rendering features such as antialiasing and smooth pixmap transformation.

QPainter::TextAntialiasing is enabled by default.

Example:

QGraphicsScene scene;

scene.addRect(QRectF(-10, -10, 20, 20));

QGraphicsView view(&scene);

view.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);

view.show();

new ViewportAnchor QtGui.QGraphicsView.ResizeAnchor

getset

This property holds how the view should position the scene when the view is resized.

QGraphicsView uses this property to decide how to position the scene in the viewport when the viewport widget's size changes. The default behavior, NoAnchor, leaves the scene's position unchanged during a resize; the top-left corner of the view will appear to be anchored while resizing.

Note that the effect of this property is noticeable when only a part of the scene is visible (i.e., when there are scroll bars). Otherwise, if the whole scene fits in the view, QGraphicsScene uses the view alignment to position the scene in the view.

new Qt.ItemSelectionMode QtGui.QGraphicsView.RubberBandSelectionMode

getset

This property holds the behavior for selecting items with a rubber band selection rectangle.

This property defines how items are selected when using the RubberBandDrag drag mode.

The default value is Qt::IntersectsItemShape; all items whose shape intersects with or is contained by the rubber band are selected.

This property was introduced in Qt 4.3.

new QGraphicsScene QtGui.QGraphicsView.Scene

getset

Returns a pointer to the scene that is currently visualized in the view. If no scene is currently visualized, 0 is returned.

Sets the current scene to scene. If scene is already being viewed, this function does nothing.

When a scene is set on a view, the QGraphicsScene::changed() signal is automatically connected to this view's updateScene() slot, and the view's scroll bars are adjusted to fit the size of the scene.

new QRectF QtGui.QGraphicsView.SceneRect

getset

This property holds the area of the scene visualized by this view.

The scene rectangle defines the extent of the scene, and in the view's case, this means the area of the scene that you can navigate using the scroll bars.

If unset, or if a null QRectF is set, this property has the same value as QGraphicsScene::sceneRect, and it changes with QGraphicsScene::sceneRect. Otherwise, the view's scene rect is unaffected by the scene.

Note that, although the scene supports a virtually unlimited size, the range of the scroll bars will never exceed the range of an integer (INT_MIN, INT_MAX). When the scene is larger than the scroll bars' values, you can choose to use translate() to navigate the scene instead.

By default, this property contains a rectangle at the origin with zero width and height.

new QMetaObject QtGui.QGraphicsView.StaticMetaObject

staticget

new QTransform QtGui.QGraphicsView.Transform

get

Returns the current transformation matrix for the view. If no current transformation is set, the identity matrix is returned.

See also setTransform(), rotate(), scale(), shear(), and translate().

new ViewportAnchor QtGui.QGraphicsView.TransformationAnchor

getset

This property holds how the view should position the scene during transformations.

QGraphicsView uses this property to decide how to position the scene in the viewport when the transformation matrix changes, and the coordinate system of the view is transformed. The default behavior, AnchorViewCenter, ensures that the scene point at the center of the view remains unchanged during transformations (e.g., when rotating, the scene will appear to rotate around the center of the view).

Note that the effect of this property is noticeable when only a part of the scene is visible (i.e., when there are scroll bars). Otherwise, if the whole scene fits in the view, QGraphicsScene uses the view alignment to position the scene in the view.

new ViewportUpdateMode QtGui.QGraphicsView.viewportUpdateMode

getset

This property holds how the viewport should update its contents.

QGraphicsView uses this property to decide how to update areas of the scene that have been reexposed or changed. Usually you do not need to modify this property, but there are some cases where doing so can improve rendering performance. See the ViewportUpdateMode documentation for specific details.

The default value is MinimalViewportUpdate, where QGraphicsView will update as small an area of the viewport as possible when the contents change.

This property was introduced in Qt 4.3.