QtBase  v6.3.1
Public Types | Public Member Functions | Protected Member Functions | List of all members
QGraphicsPixmapItem Class Reference

The QGraphicsPixmapItem class provides a pixmap item that you can add to a QGraphicsScene. More...

#include <qgraphicsitem.h>

Inheritance diagram for QGraphicsPixmapItem:
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Public Types

enum  ShapeMode { MaskShape , BoundingRectShape , HeuristicMaskShape }
 
enum  { Type = 7 }
 
- Public Types inherited from QGraphicsItem
enum  GraphicsItemFlag {
  ItemIsMovable = 0x1 , ItemIsSelectable = 0x2 , ItemIsFocusable = 0x4 , ItemClipsToShape = 0x8 ,
  ItemClipsChildrenToShape = 0x10 , ItemIgnoresTransformations = 0x20 , ItemIgnoresParentOpacity = 0x40 , ItemDoesntPropagateOpacityToChildren = 0x80 ,
  ItemStacksBehindParent = 0x100 , ItemUsesExtendedStyleOption = 0x200 , ItemHasNoContents = 0x400 , ItemSendsGeometryChanges = 0x800 ,
  ItemAcceptsInputMethod = 0x1000 , ItemNegativeZStacksBehindParent = 0x2000 , ItemIsPanel = 0x4000 , ItemIsFocusScope = 0x8000 ,
  ItemSendsScenePositionChanges = 0x10000 , ItemStopsClickFocusPropagation = 0x20000 , ItemStopsFocusHandling = 0x40000 , ItemContainsChildrenInShape = 0x80000
}
 
enum  GraphicsItemChange {
  ItemPositionChange , ItemVisibleChange = 2 , ItemEnabledChange , ItemSelectedChange ,
  ItemParentChange , ItemChildAddedChange , ItemChildRemovedChange , ItemTransformChange ,
  ItemPositionHasChanged , ItemTransformHasChanged , ItemSceneChange , ItemVisibleHasChanged ,
  ItemEnabledHasChanged , ItemSelectedHasChanged , ItemParentHasChanged , ItemSceneHasChanged ,
  ItemCursorChange , ItemCursorHasChanged , ItemToolTipChange , ItemToolTipHasChanged ,
  ItemFlagsChange , ItemFlagsHaveChanged , ItemZValueChange , ItemZValueHasChanged ,
  ItemOpacityChange , ItemOpacityHasChanged , ItemScenePositionHasChanged , ItemRotationChange ,
  ItemRotationHasChanged , ItemScaleChange , ItemScaleHasChanged , ItemTransformOriginPointChange ,
  ItemTransformOriginPointHasChanged
}
 
enum  CacheMode { NoCache , ItemCoordinateCache , DeviceCoordinateCache }
 
enum  PanelModality { NonModal , PanelModal , SceneModal }
 
enum  { Type = 1 , UserType = 65536 }
 

Public Member Functions

 QGraphicsPixmapItem (QGraphicsItem *parent=nullptr)
 
 QGraphicsPixmapItem (const QPixmap &pixmap, QGraphicsItem *parent=nullptr)
 
 ~QGraphicsPixmapItem ()
 
QPixmap pixmap () const
 
void setPixmap (const QPixmap &pixmap)
 
Qt::TransformationMode transformationMode () const
 
void setTransformationMode (Qt::TransformationMode mode)
 
QPointF offset () const
 
void setOffset (const QPointF &offset)
 
void setOffset (qreal x, qreal y)
 
QRectF boundingRect () const override
 
QPainterPath shape () const override
 
bool contains (const QPointF &point) const override
 
void paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override
 
bool isObscuredBy (const QGraphicsItem *item) const override
 
QPainterPath opaqueArea () const override
 
int type () const override
 
ShapeMode shapeMode () const
 
void setShapeMode (ShapeMode mode)
 
- Public Member Functions inherited from QGraphicsItem
 QGraphicsItem (QGraphicsItem *parent=nullptr)
 
virtual ~QGraphicsItem ()
 
QGraphicsScenescene () const
 
QGraphicsItemparentItem () const
 
QGraphicsItemtopLevelItem () const
 
QGraphicsObjectparentObject () const
 
QGraphicsWidgetparentWidget () const
 
QGraphicsWidgettopLevelWidget () const
 
QGraphicsWidgetwindow () const
 
QGraphicsItempanel () const
 
void setParentItem (QGraphicsItem *parent)
 
QList< QGraphicsItem * > childItems () const
 
bool isWidget () const
 
bool isWindow () const
 
bool isPanel () const
 
QGraphicsObjecttoGraphicsObject ()
 
const QGraphicsObjecttoGraphicsObject () const
 
QGraphicsItemGroupgroup () const
 
void setGroup (QGraphicsItemGroup *group)
 
GraphicsItemFlags flags () const
 
void setFlag (GraphicsItemFlag flag, bool enabled=true)
 
void setFlags (GraphicsItemFlags flags)
 
CacheMode cacheMode () const
 
void setCacheMode (CacheMode mode, const QSize &cacheSize=QSize())
 
PanelModality panelModality () const
 
void setPanelModality (PanelModality panelModality)
 
bool isBlockedByModalPanel (QGraphicsItem **blockingPanel=nullptr) const
 
QCursor cursor () const
 
void setCursor (const QCursor &cursor)
 
bool hasCursor () const
 
void unsetCursor ()
 
bool isVisible () const
 
bool isVisibleTo (const QGraphicsItem *parent) const
 
void setVisible (bool visible)
 
void hide ()
 
void show ()
 
bool isEnabled () const
 
void setEnabled (bool enabled)
 
bool isSelected () const
 
void setSelected (bool selected)
 
bool acceptDrops () const
 
void setAcceptDrops (bool on)
 
qreal opacity () const
 
qreal effectiveOpacity () const
 
void setOpacity (qreal opacity)
 
Qt::MouseButtons acceptedMouseButtons () const
 
void setAcceptedMouseButtons (Qt::MouseButtons buttons)
 
bool acceptHoverEvents () const
 
void setAcceptHoverEvents (bool enabled)
 
bool acceptTouchEvents () const
 
void setAcceptTouchEvents (bool enabled)
 
bool filtersChildEvents () const
 
void setFiltersChildEvents (bool enabled)
 
bool handlesChildEvents () const
 
void setHandlesChildEvents (bool enabled)
 
bool isActive () const
 
void setActive (bool active)
 
bool hasFocus () const
 
void setFocus (Qt::FocusReason focusReason=Qt::OtherFocusReason)
 
void clearFocus ()
 
QGraphicsItemfocusProxy () const
 
void setFocusProxy (QGraphicsItem *item)
 
QGraphicsItemfocusItem () const
 
QGraphicsItemfocusScopeItem () const
 
void grabMouse ()
 
void ungrabMouse ()
 
void grabKeyboard ()
 
void ungrabKeyboard ()
 
QPointF pos () const
 
qreal x () const
 
void setX (qreal x)
 
qreal y () const
 
void setY (qreal y)
 
QPointF scenePos () const
 
void setPos (const QPointF &pos)
 
void setPos (qreal x, qreal y)
 
void moveBy (qreal dx, qreal dy)
 
void ensureVisible (const QRectF &rect=QRectF(), int xmargin=50, int ymargin=50)
 
void ensureVisible (qreal x, qreal y, qreal w, qreal h, int xmargin=50, int ymargin=50)
 
QTransform transform () const
 
QTransform sceneTransform () const
 
QTransform deviceTransform (const QTransform &viewportTransform) const
 
QTransform itemTransform (const QGraphicsItem *other, bool *ok=nullptr) const
 
void setTransform (const QTransform &matrix, bool combine=false)
 
void resetTransform ()
 
void setRotation (qreal angle)
 
qreal rotation () const
 
void setScale (qreal scale)
 
qreal scale () const
 
QList< QGraphicsTransform * > transformations () const
 
void setTransformations (const QList< QGraphicsTransform * > &transformations)
 
QPointF transformOriginPoint () const
 
void setTransformOriginPoint (const QPointF &origin)
 
void setTransformOriginPoint (qreal ax, qreal ay)
 
virtual void advance (int phase)
 
qreal zValue () const
 
void setZValue (qreal z)
 
void stackBefore (const QGraphicsItem *sibling)
 
QRectF childrenBoundingRect () const
 
QRectF sceneBoundingRect () const
 
bool isClipped () const
 
QPainterPath clipPath () const
 
virtual bool collidesWithItem (const QGraphicsItem *other, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
 
virtual bool collidesWithPath (const QPainterPath &path, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
 
QList< QGraphicsItem * > collidingItems (Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
 
bool isObscured (const QRectF &rect=QRectF()) const
 
bool isObscured (qreal x, qreal y, qreal w, qreal h) const
 
QRegion boundingRegion (const QTransform &itemToDeviceTransform) const
 
qreal boundingRegionGranularity () const
 
void setBoundingRegionGranularity (qreal granularity)
 
void update (const QRectF &rect=QRectF())
 
void update (qreal x, qreal y, qreal width, qreal height)
 
void scroll (qreal dx, qreal dy, const QRectF &rect=QRectF())
 
QPointF mapToItem (const QGraphicsItem *item, const QPointF &point) const
 
QPointF mapToParent (const QPointF &point) const
 
QPointF mapToScene (const QPointF &point) const
 
QPolygonF mapToItem (const QGraphicsItem *item, const QRectF &rect) const
 
QPolygonF mapToParent (const QRectF &rect) const
 
QPolygonF mapToScene (const QRectF &rect) const
 
QRectF mapRectToItem (const QGraphicsItem *item, const QRectF &rect) const
 
QRectF mapRectToParent (const QRectF &rect) const
 
QRectF mapRectToScene (const QRectF &rect) const
 
QPolygonF mapToItem (const QGraphicsItem *item, const QPolygonF &polygon) const
 
QPolygonF mapToParent (const QPolygonF &polygon) const
 
QPolygonF mapToScene (const QPolygonF &polygon) const
 
QPainterPath mapToItem (const QGraphicsItem *item, const QPainterPath &path) const
 
QPainterPath mapToParent (const QPainterPath &path) const
 
QPainterPath mapToScene (const QPainterPath &path) const
 
QPointF mapFromItem (const QGraphicsItem *item, const QPointF &point) const
 
QPointF mapFromParent (const QPointF &point) const
 
QPointF mapFromScene (const QPointF &point) const
 
QPolygonF mapFromItem (const QGraphicsItem *item, const QRectF &rect) const
 
QPolygonF mapFromParent (const QRectF &rect) const
 
QPolygonF mapFromScene (const QRectF &rect) const
 
QRectF mapRectFromItem (const QGraphicsItem *item, const QRectF &rect) const
 
QRectF mapRectFromParent (const QRectF &rect) const
 
QRectF mapRectFromScene (const QRectF &rect) const
 
QPolygonF mapFromItem (const QGraphicsItem *item, const QPolygonF &polygon) const
 
QPolygonF mapFromParent (const QPolygonF &polygon) const
 
QPolygonF mapFromScene (const QPolygonF &polygon) const
 
QPainterPath mapFromItem (const QGraphicsItem *item, const QPainterPath &path) const
 
QPainterPath mapFromParent (const QPainterPath &path) const
 
QPainterPath mapFromScene (const QPainterPath &path) const
 
QPointF mapToItem (const QGraphicsItem *item, qreal x, qreal y) const
 
QPointF mapToParent (qreal x, qreal y) const
 
QPointF mapToScene (qreal x, qreal y) const
 
QPolygonF mapToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
 
QPolygonF mapToParent (qreal x, qreal y, qreal w, qreal h) const
 
QPolygonF mapToScene (qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectToParent (qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectToScene (qreal x, qreal y, qreal w, qreal h) const
 
QPointF mapFromItem (const QGraphicsItem *item, qreal x, qreal y) const
 
QPointF mapFromParent (qreal x, qreal y) const
 
QPointF mapFromScene (qreal x, qreal y) const
 
QPolygonF mapFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
 
QPolygonF mapFromParent (qreal x, qreal y, qreal w, qreal h) const
 
QPolygonF mapFromScene (qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectFromParent (qreal x, qreal y, qreal w, qreal h) const
 
QRectF mapRectFromScene (qreal x, qreal y, qreal w, qreal h) const
 
bool isAncestorOf (const QGraphicsItem *child) const
 
QGraphicsItemcommonAncestorItem (const QGraphicsItem *other) const
 
bool isUnderMouse () const
 
QVariant data (int key) const
 
void setData (int key, const QVariant &value)
 
Qt::InputMethodHints inputMethodHints () const
 
void setInputMethodHints (Qt::InputMethodHints hints)
 
void installSceneEventFilter (QGraphicsItem *filterItem)
 
void removeSceneEventFilter (QGraphicsItem *filterItem)
 

Protected Member Functions

bool supportsExtension (Extension extension) const override
 
void setExtension (Extension extension, const QVariant &variant) override
 
QVariant extension (const QVariant &variant) const override
 
- Protected Member Functions inherited from QGraphicsItem
void updateMicroFocus ()
 
virtual bool sceneEventFilter (QGraphicsItem *watched, QEvent *event)
 
virtual bool sceneEvent (QEvent *event)
 
virtual void contextMenuEvent (QGraphicsSceneContextMenuEvent *event)
 
virtual void dragEnterEvent (QGraphicsSceneDragDropEvent *event)
 
virtual void dragLeaveEvent (QGraphicsSceneDragDropEvent *event)
 
virtual void dragMoveEvent (QGraphicsSceneDragDropEvent *event)
 
virtual void dropEvent (QGraphicsSceneDragDropEvent *event)
 
virtual void focusInEvent (QFocusEvent *event)
 
virtual void focusOutEvent (QFocusEvent *event)
 
virtual void hoverEnterEvent (QGraphicsSceneHoverEvent *event)
 
virtual void hoverMoveEvent (QGraphicsSceneHoverEvent *event)
 
virtual void hoverLeaveEvent (QGraphicsSceneHoverEvent *event)
 
virtual void keyPressEvent (QKeyEvent *event)
 
virtual void keyReleaseEvent (QKeyEvent *event)
 
virtual void mousePressEvent (QGraphicsSceneMouseEvent *event)
 
virtual void mouseMoveEvent (QGraphicsSceneMouseEvent *event)
 
virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *event)
 
virtual void mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event)
 
virtual void wheelEvent (QGraphicsSceneWheelEvent *event)
 
virtual void inputMethodEvent (QInputMethodEvent *event)
 
virtual QVariant inputMethodQuery (Qt::InputMethodQuery query) const
 
virtual QVariant itemChange (GraphicsItemChange change, const QVariant &value)
 
 QGraphicsItem (QGraphicsItemPrivate &dd, QGraphicsItem *parent)
 
void addToIndex ()
 
void removeFromIndex ()
 
void prepareGeometryChange ()
 

Additional Inherited Members

- Protected Types inherited from QGraphicsItem
enum  Extension { UserExtension = 0x80000000 }
 
- Protected Attributes inherited from QGraphicsItem
QScopedPointer< QGraphicsItemPrivated_ptr
 

Detailed Description

The QGraphicsPixmapItem class provides a pixmap item that you can add to a QGraphicsScene.

Since
4.2

\inmodule QtWidgets

To set the item's pixmap, pass a QPixmap to QGraphicsPixmapItem's constructor, or call the setPixmap() function. The pixmap() function returns the current pixmap.

QGraphicsPixmapItem uses pixmap's optional alpha mask to provide a reasonable implementation of boundingRect(), shape(), and contains().

The pixmap is drawn at the item's (0, 0) coordinate, as returned by offset(). You can change the drawing offset by calling setOffset().

You can set the pixmap's transformation mode by calling setTransformationMode(). By default, Qt::FastTransformation is used, which provides fast, non-smooth scaling. Qt::SmoothTransformation enables QPainter::SmoothPixmapTransform on the painter, and the quality depends on the platform and viewport. The result is usually not as good as calling QPixmap::scale() directly. Call transformationMode() to get the current transformation mode for the item.

See also
QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsTextItem, QGraphicsPolygonItem, QGraphicsLineItem, {Graphics View Framework}

Definition at line 803 of file qgraphicsitem.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum
Enumerator
Type 

Definition at line 835 of file qgraphicsitem.h.

◆ ShapeMode

This enum describes how QGraphicsPixmapItem calculates its shape and opaque area.

The default value is MaskShape.

\value MaskShape The shape is determined by calling QPixmap::mask(). This shape includes only the opaque pixels of the pixmap. Because the shape is more complex, however, it can be slower than the other modes, and uses more memory.

\value BoundingRectShape The shape is determined by tracing the outline of the pixmap. This is the fastest shape mode, but it does not take into account any transparent areas on the pixmap.

\value HeuristicMaskShape The shape is determine by calling QPixmap::createHeuristicMask(). The performance and memory consumption is similar to MaskShape.

Enumerator
MaskShape 
BoundingRectShape 
HeuristicMaskShape 

Definition at line 806 of file qgraphicsitem.h.

Constructor & Destructor Documentation

◆ QGraphicsPixmapItem() [1/2]

QGraphicsPixmapItem::QGraphicsPixmapItem ( QGraphicsItem parent = nullptr)
explicit

Constructs a QGraphicsPixmapItem. parent is passed to QGraphicsItem's constructor.

See also
QGraphicsScene::addItem()

Definition at line 9472 of file qgraphicsitem.cpp.

◆ QGraphicsPixmapItem() [2/2]

QGraphicsPixmapItem::QGraphicsPixmapItem ( const QPixmap pixmap,
QGraphicsItem parent = nullptr 
)
explicit

Constructs a QGraphicsPixmapItem, using pixmap as the default pixmap. parent is passed to QGraphicsItem's constructor.

See also
QGraphicsScene::addItem()

Definition at line 9460 of file qgraphicsitem.cpp.

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◆ ~QGraphicsPixmapItem()

QGraphicsPixmapItem::~QGraphicsPixmapItem ( )

Destroys the QGraphicsPixmapItem.

Definition at line 9480 of file qgraphicsitem.cpp.

Member Function Documentation

◆ boundingRect()

QRectF QGraphicsPixmapItem::boundingRect ( ) const
overridevirtual

\reimp

Implements QGraphicsItem.

Reimplemented in ImageItem.

Definition at line 9582 of file qgraphicsitem.cpp.

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◆ contains()

bool QGraphicsPixmapItem::contains ( const QPointF point) const
overridevirtual

\reimp

Reimplemented from QGraphicsItem.

Definition at line 9612 of file qgraphicsitem.cpp.

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◆ extension()

QVariant QGraphicsPixmapItem::extension ( const QVariant variant) const
overrideprotectedvirtual

Reimplemented from QGraphicsItem.

Definition at line 9706 of file qgraphicsitem.cpp.

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◆ isObscuredBy()

bool QGraphicsPixmapItem::isObscuredBy ( const QGraphicsItem item) const
overridevirtual

\reimp

Reimplemented from QGraphicsItem.

Definition at line 9638 of file qgraphicsitem.cpp.

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◆ offset()

QPointF QGraphicsPixmapItem::offset ( ) const

Returns the pixmap item's offset, which defines the point of the top-left corner of the pixmap, in local coordinates.

See also
setOffset()

Definition at line 9549 of file qgraphicsitem.cpp.

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◆ opaqueArea()

QPainterPath QGraphicsPixmapItem::opaqueArea ( ) const
overridevirtual

\reimp

Reimplemented from QGraphicsItem.

Definition at line 9646 of file qgraphicsitem.cpp.

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◆ paint()

void QGraphicsPixmapItem::paint ( QPainter painter,
const QStyleOptionGraphicsItem option,
QWidget widget 
)
overridevirtual

\reimp

Implements QGraphicsItem.

Reimplemented in UpdatedPixmapCacheItem, AnimatedPixmapCacheItem, ImageItem, and ExposedPixmapItem.

Definition at line 9620 of file qgraphicsitem.cpp.

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◆ pixmap()

QPixmap QGraphicsPixmapItem::pixmap ( ) const

Returns the item's pixmap, or an invalid QPixmap if no pixmap has been set.

See also
setPixmap()

Definition at line 9504 of file qgraphicsitem.cpp.

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◆ setExtension()

void QGraphicsPixmapItem::setExtension ( Extension  extension,
const QVariant variant 
)
overrideprotectedvirtual

Reimplemented from QGraphicsItem.

Definition at line 9697 of file qgraphicsitem.cpp.

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◆ setOffset() [1/2]

void QGraphicsPixmapItem::setOffset ( const QPointF offset)

Sets the pixmap item's offset to offset. QGraphicsPixmapItem will draw its pixmap using offset for its top-left corner.

See also
offset()

Definition at line 9561 of file qgraphicsitem.cpp.

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◆ setOffset() [2/2]

void QGraphicsPixmapItem::setOffset ( qreal  x,
qreal  y 
)
inline
Since
4.3

This convenience function is equivalent to calling setOffset(QPointF(x, y)).

Definition at line 851 of file qgraphicsitem.h.

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◆ setPixmap()

void QGraphicsPixmapItem::setPixmap ( const QPixmap pixmap)

Sets the item's pixmap to pixmap.

See also
pixmap()

Definition at line 9489 of file qgraphicsitem.cpp.

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◆ setShapeMode()

void QGraphicsPixmapItem::setShapeMode ( ShapeMode  mode)

Sets the item's shape mode to mode. The shape mode describes how QGraphicsPixmapItem calculates its shape. The default mode is MaskShape.

See also
shapeMode(), ShapeMode

Definition at line 9676 of file qgraphicsitem.cpp.

◆ setTransformationMode()

void QGraphicsPixmapItem::setTransformationMode ( Qt::TransformationMode  mode)

Sets the pixmap item's transformation mode to mode, and toggles an update of the item. The default mode is Qt::FastTransformation, which provides quick transformation with no smoothing.

Qt::SmoothTransformation enables QPainter::SmoothPixmapTransform on the painter, and the quality depends on the platform and viewport. The result is usually not as good as calling QPixmap::scale() directly.

See also
transformationMode()

Definition at line 9534 of file qgraphicsitem.cpp.

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◆ shape()

QPainterPath QGraphicsPixmapItem::shape ( ) const
overridevirtual

\reimp

Reimplemented from QGraphicsItem.

Definition at line 9598 of file qgraphicsitem.cpp.

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◆ shapeMode()

QGraphicsPixmapItem::ShapeMode QGraphicsPixmapItem::shapeMode ( ) const

Returns the item's shape mode. The shape mode describes how QGraphicsPixmapItem calculates its shape. The default mode is MaskShape.

See also
setShapeMode(), ShapeMode

Definition at line 9665 of file qgraphicsitem.cpp.

◆ supportsExtension()

bool QGraphicsPixmapItem::supportsExtension ( Extension  extension) const
overrideprotectedvirtual

Reimplemented from QGraphicsItem.

Definition at line 9688 of file qgraphicsitem.cpp.

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◆ transformationMode()

Qt::TransformationMode QGraphicsPixmapItem::transformationMode ( ) const

Returns the transformation mode of the pixmap. The default mode is Qt::FastTransformation, which provides quick transformation with no smoothing.

See also
setTransformationMode()

Definition at line 9517 of file qgraphicsitem.cpp.

◆ type()

int QGraphicsPixmapItem::type ( ) const
overridevirtual

\reimp

Reimplemented from QGraphicsItem.

Definition at line 9654 of file qgraphicsitem.cpp.


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