Inheritance diagram for RectItem:

Collaboration diagram for RectItem:

Public Member Functions
	RectItem (Qt::GlobalColor color, QGraphicsItem *parent=0)

QRectF	boundingRect () const override

void	paint (QPainter painter, const QStyleOptionGraphicsItem , QWidget *) override

Public Member Functions inherited from QGraphicsItem
	QGraphicsItem (QGraphicsItem *parent=nullptr)

virtual	~QGraphicsItem ()

QGraphicsScene *	scene () const

QGraphicsItem *	parentItem () const

QGraphicsItem *	topLevelItem () const

QGraphicsObject *	parentObject () const

QGraphicsWidget *	parentWidget () const

QGraphicsWidget *	topLevelWidget () const

QGraphicsWidget *	window () const

QGraphicsItem *	panel () const

void	setParentItem (QGraphicsItem *parent)

QList< QGraphicsItem * >	childItems () const

bool	isWidget () const

bool	isWindow () const

bool	isPanel () const

QGraphicsObject *	toGraphicsObject ()

const QGraphicsObject *	toGraphicsObject () const

QGraphicsItemGroup *	group () 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 ()

QGraphicsItem *	focusProxy () const

void	setFocusProxy (QGraphicsItem *item)

QGraphicsItem *	focusItem () const

QGraphicsItem *	focusScopeItem () 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

virtual QPainterPath	shape () const

bool	isClipped () const

QPainterPath	clipPath () const

virtual bool	contains (const QPointF &point) 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

virtual bool	isObscuredBy (const QGraphicsItem *item) const

virtual QPainterPath	opaqueArea () 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

QGraphicsItem *	commonAncestorItem (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)

virtual int	type () const

void	installSceneEventFilter (QGraphicsItem *filterItem)

void	removeSceneEventFilter (QGraphicsItem *filterItem)

Public Attributes
Qt::GlobalColor	mColor

Additional Inherited Members
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 }

Protected Types inherited from QGraphicsItem
enum	Extension { UserExtension = 0x80000000 }

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)

virtual bool	supportsExtension (Extension extension) const

virtual void	setExtension (Extension extension, const QVariant &variant)

virtual QVariant	extension (const QVariant &variant) const

	QGraphicsItem (QGraphicsItemPrivate &dd, QGraphicsItem *parent)

void	addToIndex ()

void	removeFromIndex ()

void	prepareGeometryChange ()

Protected Attributes inherited from QGraphicsItem
QScopedPointer< QGraphicsItemPrivate >	d_ptr

Related Functions inherited from QGraphicsItem
T	qgraphicsitem_cast (QGraphicsItem *item)

Detailed Description

Definition at line 2783 of file tst_qgraphicswidget.cpp.

Constructor & Destructor Documentation

◆ RectItem()

RectItem::RectItem	(	Qt::GlobalColor	color,
		QGraphicsItem *	parent = `0`
	)

inline

Definition at line 2787 of file tst_qgraphicswidget.cpp.

Member Function Documentation

◆ boundingRect()

QRectF RectItem::boundingRect ( ) const

inlineoverridevirtual

This pure virtual function defines the outer bounds of the item as a rectangle; all painting must be restricted to inside an item's bounding rect. QGraphicsView uses this to determine whether the item requires redrawing.

Although the item's shape can be arbitrary, the bounding rect is always rectangular, and it is unaffected by the items' transformation.

If you want to change the item's bounding rectangle, you must first call prepareGeometryChange(). This notifies the scene of the imminent change, so that it can update its item geometry index; otherwise, the scene will be unaware of the item's new geometry, and the results are undefined (typically, rendering artifacts are left within the view).

Reimplement this function to let QGraphicsView determine what parts of the widget, if any, need to be redrawn.

Note: For shapes that paint an outline / stroke, it is important to include half the pen width in the bounding rect. It is not necessary to compensate for antialiasing, though.

Example:

See also: boundingRegion(), shape(), contains(), {The Graphics View Coordinate System}, prepareGeometryChange()

Implements QGraphicsItem.

Definition at line 2789 of file tst_qgraphicswidget.cpp.

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◆ paint()

void RectItem::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget
	)

inlineoverridevirtual

This function, which is usually called by QGraphicsView, paints the contents of an item in local coordinates.

Reimplement this function in a QGraphicsItem subclass to provide the item's painting implementation, using painter. The option parameter provides style options for the item, such as its state, exposed area and its level-of-detail hints. The widget argument is optional. If provided, it points to the widget that is being painted on; otherwise, it is 0. For cached painting, widget is always 0.

The painter's pen is 0-width by default, and its pen is initialized to the QPalette::Text brush from the paint device's palette. The brush is initialized to QPalette::Window.

Make sure to constrain all painting inside the boundaries of boundingRect() to avoid rendering artifacts (as QGraphicsView does not clip the painter for you). In particular, when QPainter renders the outline of a shape using an assigned QPen, half of the outline will be drawn outside, and half inside, the shape you're rendering (e.g., with a pen width of 2 units, you must draw outlines 1 unit inside boundingRect()). QGraphicsItem does not support use of cosmetic pens with a non-zero width.

All painting is done in local coordinates.

Note: It is mandatory that an item will always redraw itself in the exact same way, unless update() was called; otherwise visual artifacts may occur. In other words, two subsequent calls to paint() must always produce the same output, unless update() was called between them.; Enabling caching for an item does not guarantee that paint() will be invoked only once by the Graphics View framework, even without any explicit call to update(). See the documentation of setCacheMode() for more details.

See also: setCacheMode(), QPen::width(), {Item Coordinates}, ItemUsesExtendedStyleOption

Implements QGraphicsItem.

Definition at line 2792 of file tst_qgraphicswidget.cpp.

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Member Data Documentation

◆ mColor

Qt::GlobalColor RectItem::mColor

Definition at line 2798 of file tst_qgraphicswidget.cpp.

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

tests/auto/widgets/graphicsview/qgraphicswidget/tst_qgraphicswidget.cpp

Public Member Functions

Public Attributes

Additional Inherited Members