The QGraphicsLineItem class provides a line item that you can add to a QGraphicsScene. More...

#include <qgraphicsitem.h>

Inheritance diagram for QGraphicsLineItem:

Public Types
enum	{ Type = 6 }

Public Types inherited from QGraphicsItem
enum	{ Type = 1, UserType = 65536 }

enum	CacheMode { NoCache, ItemCoordinateCache, DeviceCoordinateCache }
	This enum describes QGraphicsItem's cache modes. More...

enum	GraphicsItemChange { ItemPositionChange, ItemMatrixChange, ItemVisibleChange, 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 }
	This enum describes the state changes that are notified by QGraphicsItem::itemChange(). More...

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 }
	This enum describes different flags that you can set on an item to toggle different features in the item's behavior. More...

enum	PanelModality { NonModal, PanelModal, SceneModal }
	This enum specifies the behavior of a modal panel. More...

Public Functions
QRectF	boundingRect () const
	Reimplemented Function More...

bool	contains (const QPointF &point) const
	Reimplemented Function More...

bool	isObscuredBy (const QGraphicsItem *item) const
	Reimplemented Function More...

QLineF	line () const
	Returns the item's line, or a null line if no line has been set. More...

QPainterPath	opaqueArea () const
	Reimplemented Function More...

void	paint (QPainter painter, const QStyleOptionGraphicsItem option, QWidget *widget=0)
	Reimplemented Function More...

QPen	pen () const
	Returns the item's pen, or a black solid 0-width pen if no pen has been set. More...

	QGraphicsLineItem (QGraphicsItem *parent=0)
	Constructs a QGraphicsLineItem. More...

	QGraphicsLineItem (const QLineF &line, QGraphicsItem *parent=0)
	Constructs a QGraphicsLineItem, using line as the default line. More...

	QGraphicsLineItem (qreal x1, qreal y1, qreal x2, qreal y2, QGraphicsItem *parent=0)
	Constructs a QGraphicsLineItem, using the line between (x1, y1) and (x2, y2) as the default line. More...

void	setLine (const QLineF &line)
	Sets the item's line to be the given line. More...

void	setLine (qreal x1, qreal y1, qreal x2, qreal y2)
	Sets the item's line to be the line between (x1, y1) and (x2, y2). More...

void	setPen (const QPen &pen)
	Sets the item's pen to pen. More...

QPainterPath	shape () const
	Reimplemented Function More...

int	type () const
	Reimplemented Function More...

	~QGraphicsLineItem ()
	Destroys the QGraphicsLineItem. More...

Public Functions inherited from QGraphicsItem
bool	acceptDrops () const
	Returns true if this item can accept drag and drop events; otherwise, returns false. More...

Qt::MouseButtons	acceptedMouseButtons () const
	Returns the mouse buttons that this item accepts mouse events for. More...

bool	acceptHoverEvents () const
	Returns true if an item accepts hover events (QGraphicsSceneHoverEvent); otherwise, returns false. More...

bool	acceptsHoverEvents () const
	Call acceptHoverEvents() instead. More...

bool	acceptTouchEvents () const
	Returns true if an item accepts touch events; otherwise, returns false. More...

virtual void	advance (int phase)
	This virtual function is called twice for all items by the QGraphicsScene::advance() slot. More...

QRegion	boundingRegion (const QTransform &itemToDeviceTransform) const
	Returns the bounding region for this item. More...

qreal	boundingRegionGranularity () const
	Returns the item's bounding region granularity; a value between and including 0 and 1. More...

CacheMode	cacheMode () const
	Returns the cache mode for this item. More...

QList< QGraphicsItem * >	childItems () const
	Returns a list of this item's children. More...

QList< QGraphicsItem * >	children () const
	Use childItems() instead. More...

QRectF	childrenBoundingRect () const
	Returns the bounding rect of this item's descendants (i.e., its children, their children, etc.) in local coordinates. More...

void	clearFocus ()
	Takes keyboard input focus from the item. More...

QPainterPath	clipPath () const
	Returns this item's clip path, or an empty QPainterPath if this item is not clipped. More...

virtual bool	collidesWithItem (const QGraphicsItem *other, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
	Returns true if this item collides with other; otherwise returns false. More...

virtual bool	collidesWithPath (const QPainterPath &path, Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
	Returns true if this item collides with path. More...

QList< QGraphicsItem * >	collidingItems (Qt::ItemSelectionMode mode=Qt::IntersectsItemShape) const
	Returns a list of all items that collide with this item. More...

QGraphicsItem *	commonAncestorItem (const QGraphicsItem *other) const
	Returns the closest common ancestor item of this item and other, or 0 if either other is 0, or there is no common ancestor. More...

QCursor	cursor () const
	Returns the current cursor shape for the item. More...

QVariant	data (int key) const
	Returns this item's custom data for the key key as a QVariant. More...

QTransform	deviceTransform (const QTransform &viewportTransform) const
	Returns this item's device transformation matrix, using viewportTransform to map from scene to device coordinates. More...

qreal	effectiveOpacity () const
	Returns this item's effective opacity, which is between 0. More...

void	ensureVisible (const QRectF &rect=QRectF(), int xmargin=50, int ymargin=50)
	If this item is part of a scene that is viewed by a QGraphicsView, this convenience function will attempt to scroll the view to ensure that rect is visible inside the view's viewport. More...

void	ensureVisible (qreal x, qreal y, qreal w, qreal h, int xmargin=50, int ymargin=50)
	This convenience function is equivalent to calling ensureVisible(QRectF(x, y, w, h), xmargin, ymargin): More...

bool	filtersChildEvents () const
	Returns true if this item filters child events (i. More...

GraphicsItemFlags	flags () const
	Returns this item's flags. More...

QGraphicsItem *	focusItem () const
	If this item, a child or descendant of this item currently has input focus, this function will return a pointer to that item. More...

QGraphicsItem *	focusProxy () const
	Returns this item's focus proxy, or 0 if this item has no focus proxy. More...

QGraphicsItem *	focusScopeItem () const
	Returns this item's focus scope item. More...

void	grabKeyboard ()
	Grabs the keyboard input. More...

void	grabMouse ()
	Grabs the mouse input. More...

QGraphicsEffect *	graphicsEffect () const
	Returns a pointer to this item's effect if it has one; otherwise 0. More...

QGraphicsItemGroup *	group () const
	Returns a pointer to this item's item group, or 0 if this item is not member of a group. More...

bool	handlesChildEvents () const
	Returns true if this item handles child events (i. More...

bool	hasCursor () const
	Returns true if this item has a cursor set; otherwise, false is returned. More...

bool	hasFocus () const
	Returns true if this item is active, and it or its focus proxy has keyboard input focus; otherwise, returns false. More...

void	hide ()
	Hides the item. More...

Qt::InputMethodHints	inputMethodHints () const
	Returns the current input method hints of this item. More...

void	installSceneEventFilter (QGraphicsItem *filterItem)
	Installs an event filter for this item on filterItem, causing all events for this item to first pass through filterItem's sceneEventFilter() function. More...

bool	isActive () const
	Returns true if this item is active; otherwise returns false. More...

bool	isAncestorOf (const QGraphicsItem *child) const
	Returns true if this item is an ancestor of child (i.e., if this item is child's parent, or one of child's parent's ancestors). More...

bool	isBlockedByModalPanel (QGraphicsItem **blockingPanel=0) const
	Returns true if this item is blocked by a modal panel, false otherwise. More...

bool	isClipped () const
	Returns true if this item is clipped. More...

bool	isEnabled () const
	Returns true if the item is enabled; otherwise, false is returned. More...

bool	isObscured () const
	Returns true if this item's bounding rect is completely obscured by the opaque shape of any of colliding items above it (i.e., with a higher Z value than this item). More...

bool	isObscured (const QRectF &rect) const
	Returns true if rect is completely obscured by the opaque shape of any of colliding items above it (i. More...

bool	isObscured (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling isObscured(QRectF(x, y, w, h)). More...

bool	isPanel () const
	Returns true if the item is a panel; otherwise returns false. More...

bool	isSelected () const
	Returns true if this item is selected; otherwise, false is returned. More...

bool	isUnderMouse () const
	Returns true if this item is currently under the mouse cursor in one of the views; otherwise, false is returned. More...

bool	isVisible () const
	Returns true if the item is visible; otherwise, false is returned. More...

bool	isVisibleTo (const QGraphicsItem *parent) const
	Returns true if the item is visible to parent; otherwise, false is returned. More...

bool	isWidget () const
	Returns true if this item is a widget (i. More...

bool	isWindow () const
	Returns true if the item is a QGraphicsWidget window, otherwise returns false. More...

QTransform	itemTransform (const QGraphicsItem other, bool ok=0) const
	Returns a QTransform that maps coordinates from this item to other. More...

QPointF	mapFromItem (const QGraphicsItem *item, const QPointF &point) const
	Maps the point point, which is in item's coordinate system, to this item's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapFromItem (const QGraphicsItem *item, const QRectF &rect) const
	Maps the rectangle rect, which is in item's coordinate system, to this item's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapFromItem (const QGraphicsItem *item, const QPolygonF &polygon) const
	Maps the polygon polygon, which is in item's coordinate system, to this item's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapFromItem (const QGraphicsItem *item, const QPainterPath &path) const
	Maps the path path, which is in item's coordinate system, to this item's coordinate system, and returns the mapped path. More...

QPointF	mapFromItem (const QGraphicsItem *item, qreal x, qreal y) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This convenience function is equivalent to calling mapFromItem(item, QPointF(x, y)). More...

QPolygonF	mapFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const

QPointF	mapFromParent (const QPointF &point) const
	Maps the point point, which is in this item's parent's coordinate system, to this item's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapFromParent (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's parent's coordinate system, to this item's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapFromParent (const QPolygonF &polygon) const
	Maps the polygon polygon, which is in this item's parent's coordinate system, to this item's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapFromParent (const QPainterPath &path) const
	Maps the path path, which is in this item's parent's coordinate system, to this item's coordinate system, and returns the mapped path. More...

QPointF	mapFromParent (qreal x, qreal y) const
	This convenience function is equivalent to calling mapFromParent(QPointF(x, y)). More...

QPolygonF	mapFromParent (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapFromItem(QRectF(x, y, w, h)). More...

QPointF	mapFromScene (const QPointF &point) const
	Maps the point point, which is in this item's scene's coordinate system, to this item's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapFromScene (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's scene's coordinate system, to this item's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapFromScene (const QPolygonF &polygon) const
	Maps the polygon polygon, which is in this item's scene's coordinate system, to this item's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapFromScene (const QPainterPath &path) const
	Maps the path path, which is in this item's scene's coordinate system, to this item's coordinate system, and returns the mapped path. More...

QPointF	mapFromScene (qreal x, qreal y) const
	This convenience function is equivalent to calling mapFromScene(QPointF(x, y)). More...

QPolygonF	mapFromScene (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapFromScene(QRectF(x, y, w, h)). More...

QRectF	mapRectFromItem (const QGraphicsItem *item, const QRectF &rect) const
	Maps the rectangle rect, which is in item's coordinate system, to this item's coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const

QRectF	mapRectFromParent (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's parent's coordinate system, to this item's coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectFromParent (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapRectFromParent(QRectF(x, y, w, h)). More...

QRectF	mapRectFromScene (const QRectF &rect) const
	Maps the rectangle rect, which is in scene coordinates, to this item's coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectFromScene (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapRectFromScene(QRectF(x, y, w, h)). More...

QRectF	mapRectToItem (const QGraphicsItem *item, const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to item's coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const

QRectF	mapRectToParent (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to its parent's coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectToParent (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapRectToParent(QRectF(x, y, w, h)). More...

QRectF	mapRectToScene (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to the scene coordinate system, and returns the mapped rectangle as a new rectangle (i. More...

QRectF	mapRectToScene (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapRectToScene(QRectF(x, y, w, h)). More...

QPointF	mapToItem (const QGraphicsItem *item, const QPointF &point) const
	Maps the point point, which is in this item's coordinate system, to item's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapToItem (const QGraphicsItem *item, const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to item's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapToItem (const QGraphicsItem *item, const QPolygonF &polygon) const
	Maps the polygon polygon, which is in this item's coordinate system, to item's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapToItem (const QGraphicsItem *item, const QPainterPath &path) const
	Maps the path path, which is in this item's coordinate system, to item's coordinate system, and returns the mapped path. More...

QPointF	mapToItem (const QGraphicsItem *item, qreal x, qreal y) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This convenience function is equivalent to calling mapToItem(item, QPointF(x, y)). More...

QPolygonF	mapToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const

QPointF	mapToParent (const QPointF &point) const
	Maps the point point, which is in this item's coordinate system, to its parent's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapToParent (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to its parent's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapToParent (const QPolygonF &polygon) const
	Maps the polygon polygon, which is in this item's coordinate system, to its parent's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapToParent (const QPainterPath &path) const
	Maps the path path, which is in this item's coordinate system, to its parent's coordinate system, and returns the mapped path. More...

QPointF	mapToParent (qreal x, qreal y) const
	This convenience function is equivalent to calling mapToParent(QPointF(x, y)). More...

QPolygonF	mapToParent (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapToParent(QRectF(x, y, w, h)). More...

QPointF	mapToScene (const QPointF &point) const
	Maps the point point, which is in this item's coordinate system, to the scene's coordinate system, and returns the mapped coordinate. More...

QPolygonF	mapToScene (const QRectF &rect) const
	Maps the rectangle rect, which is in this item's coordinate system, to the scene's coordinate system, and returns the mapped rectangle as a polygon. More...

QPolygonF	mapToScene (const QPolygonF &polygon) const
	Maps the polygon polygon, which is in this item's coordinate system, to the scene's coordinate system, and returns the mapped polygon. More...

QPainterPath	mapToScene (const QPainterPath &path) const
	Maps the path path, which is in this item's coordinate system, to the scene's coordinate system, and returns the mapped path. More...

QPointF	mapToScene (qreal x, qreal y) const
	This convenience function is equivalent to calling mapToScene(QPointF(x, y)). More...

QPolygonF	mapToScene (qreal x, qreal y, qreal w, qreal h) const
	This convenience function is equivalent to calling mapToScene(QRectF(x, y, w, h)). More...

QMatrix	matrix () const
	Returns the item's affine transformation matrix. More...

void	moveBy (qreal dx, qreal dy)
	Moves the item by dx points horizontally, and dy point vertically. More...

qreal	opacity () const
	Returns this item's local opacity, which is between 0. More...

QGraphicsItem *	panel () const
	Returns the item's panel, or 0 if this item does not have a panel. More...

PanelModality	panelModality () const
	Returns the modality for this item. More...

QGraphicsItem *	parentItem () const
	Returns a pointer to this item's parent item. More...

QGraphicsObject *	parentObject () const
	Returns a pointer to the item's parent, cast to a QGraphicsObject. More...

QGraphicsWidget *	parentWidget () const
	Returns a pointer to the item's parent widget. More...

QPointF	pos () const
	Returns the position of the item in parent coordinates. More...

	QGraphicsItem (QGraphicsItem *parent=0)
	Constructs a QGraphicsItem with the given parent item. More...

void	removeSceneEventFilter (QGraphicsItem *filterItem)
	Removes an event filter on this item from filterItem. More...

void	resetMatrix ()
	Use resetTransform() instead. More...

void	resetTransform ()
	Resets this item's transformation matrix to the identity matrix or all the transformation properties to their default values. More...

void	rotate (qreal angle)
	Use. More...

qreal	rotation () const
	Returns the clockwise rotation, in degrees, around the Z axis. More...

void	scale (qreal sx, qreal sy)
	Use. More...

qreal	scale () const
	Returns the scale factor of the item. More...

QGraphicsScene *	scene () const
	Returns the current scene for the item, or 0 if the item is not stored in a scene. More...

QRectF	sceneBoundingRect () const
	Returns the bounding rect of this item in scene coordinates, by combining sceneTransform() with boundingRect(). More...

QMatrix	sceneMatrix () const
	Use sceneTransform() instead. More...

QPointF	scenePos () const
	Returns the item's position in scene coordinates. More...

QTransform	sceneTransform () const
	Returns this item's scene transformation matrix. More...

void	scroll (qreal dx, qreal dy, const QRectF &rect=QRectF())
	Scrolls the contents of rect by dx, dy. More...

void	setAcceptDrops (bool on)
	If on is true, this item will accept drag and drop events; otherwise, it is transparent for drag and drop events. More...

void	setAcceptedMouseButtons (Qt::MouseButtons buttons)
	Sets the mouse buttons that this item accepts mouse events for. More...

void	setAcceptHoverEvents (bool enabled)
	If enabled is true, this item will accept hover events; otherwise, it will ignore them. More...

void	setAcceptsHoverEvents (bool enabled)
	Use setAcceptHoverEvents(enabled) instead. More...

void	setAcceptTouchEvents (bool enabled)
	If enabled is true, this item will accept touch events; otherwise, it will ignore them. More...

void	setActive (bool active)
	If active is true, and the scene is active, this item's panel will be activated. More...

void	setBoundingRegionGranularity (qreal granularity)
	Sets the bounding region granularity to granularity; a value between and including 0 and 1. More...

void	setCacheMode (CacheMode mode, const QSize &cacheSize=QSize())
	Sets the item's cache mode to mode. More...

void	setCursor (const QCursor &cursor)
	Sets the current cursor shape for the item to cursor. More...

void	setData (int key, const QVariant &value)
	Sets this item's custom data for the key key to value. More...

void	setEnabled (bool enabled)
	If enabled is true, the item is enabled; otherwise, it is disabled. More...

void	setFiltersChildEvents (bool enabled)
	If enabled is true, this item is set to filter all events for all its children (i. More...

void	setFlag (GraphicsItemFlag flag, bool enabled=true)
	If enabled is true, the item flag flag is enabled; otherwise, it is disabled. More...

void	setFlags (GraphicsItemFlags flags)
	Sets the item flags to flags. More...

void	setFocus (Qt::FocusReason focusReason=Qt::OtherFocusReason)
	Gives keyboard input focus to this item. More...

void	setFocusProxy (QGraphicsItem *item)
	Sets the item's focus proxy to item. More...

void	setGraphicsEffect (QGraphicsEffect *effect)
	Sets effect as the item's effect. More...

void	setGroup (QGraphicsItemGroup *group)
	Adds this item to the item group group. More...

void	setHandlesChildEvents (bool enabled)
	If enabled is true, this item is set to handle all events for all its children (i. More...

void	setInputMethodHints (Qt::InputMethodHints hints)
	Sets the current input method hints of this item to hints. More...

void	setMatrix (const QMatrix &matrix, bool combine=false)
	Sets the item's affine transformation matrix. More...

void	setOpacity (qreal opacity)
	Sets this item's local opacity, between 0. More...

void	setPanelModality (PanelModality panelModality)
	Sets the modality for this item to panelModality. More...

void	setParentItem (QGraphicsItem *parent)
	Sets this item's parent item to newParent. More...

void	setPos (const QPointF &pos)
	Sets the position of the item to pos, which is in parent coordinates. More...

void	setPos (qreal x, qreal y)
	This convenience function is equivalent to calling setPos(QPointF(x, y)). More...

void	setRotation (qreal angle)
	Sets the clockwise rotation angle, in degrees, around the Z axis. More...

void	setScale (qreal scale)
	Sets the scale factor of the item. More...

void	setSelected (bool selected)
	If selected is true and this item is selectable, this item is selected; otherwise, it is unselected. More...

void	setToolTip (const QString &toolTip)
	Sets the item's tool tip to toolTip. More...

void	setTransform (const QTransform &matrix, bool combine=false)
	Sets the item's current transformation matrix to matrix. More...

void	setTransformations (const QList< QGraphicsTransform *> &transformations)
	Sets a list of graphics transformations (QGraphicsTransform) that currently apply to this item. More...

void	setTransformOriginPoint (const QPointF &origin)
	Sets the origin point for the transformation in item coordinates. More...

void	setTransformOriginPoint (qreal ax, qreal ay)
	Sets the origin point for the transformation in item coordinates. More...

void	setVisible (bool visible)
	If visible is true, the item is made visible. More...

void	setX (qreal x)
	Set's the x coordinate of the item's position. More...

void	setY (qreal y)
	Set's the y coordinate of the item's position. More...

void	setZValue (qreal z)
	Sets the Z-value of the item to z. More...

void	shear (qreal sh, qreal sv)
	Use. More...

void	show ()
	Shows the item. More...

void	stackBefore (const QGraphicsItem *sibling)
	Stacks this item before sibling, which must be a sibling item (i. More...

QGraphicsObject *	toGraphicsObject ()
	Return the graphics item cast to a QGraphicsObject, if the class is actually a graphics object, 0 otherwise. More...

const QGraphicsObject *	toGraphicsObject () const
	Return the graphics item cast to a QGraphicsObject, if the class is actually a graphics object, 0 otherwise. More...

QString	toolTip () const
	Returns the item's tool tip, or an empty QString if no tool tip has been set. More...

QGraphicsItem *	topLevelItem () const
	Returns this item's top-level item. More...

QGraphicsWidget *	topLevelWidget () const
	Returns a pointer to the item's top level widget (i. More...

QTransform	transform () const
	Returns this item's transformation matrix. More...

QList< QGraphicsTransform * >	transformations () const
	Returns a list of graphics transforms that currently apply to this item. More...

QPointF	transformOriginPoint () const
	Returns the origin point for the transformation in item coordinates. More...

void	translate (qreal dx, qreal dy)
	Use setPos() or setTransformOriginPoint() instead. More...

void	ungrabKeyboard ()
	Releases the keyboard grab. More...

void	ungrabMouse ()
	Releases the mouse grab. More...

void	unsetCursor ()
	Clears the cursor from this item. More...

void	update (const QRectF &rect=QRectF())
	Schedules a redraw of the area covered by rect in this item. More...

void	update (qreal x, qreal y, qreal width, qreal height)
	This convenience function is equivalent to calling update(QRectF(x, y, width, height)). More...

QGraphicsWidget *	window () const
	Returns the item's window, or 0 if this item does not have a window. More...

qreal	x () const
	This convenience function is equivalent to calling pos(). More...

qreal	y () const
	This convenience function is equivalent to calling pos(). More...

qreal	zValue () const
	Returns the Z-value of the item. More...

virtual	~QGraphicsItem ()
	Destroys the QGraphicsItem and all its children. More...

Protected Functions
QVariant	extension (const QVariant &variant) const

void	setExtension (Extension extension, const QVariant &variant)

bool	supportsExtension (Extension extension) const

Protected Functions inherited from QGraphicsItem
void	addToIndex ()
	Adds this item to the scene's index. More...

virtual void	contextMenuEvent (QGraphicsSceneContextMenuEvent *event)
	This event handler can be reimplemented in a subclass to process context menu events. More...

virtual void	dragEnterEvent (QGraphicsSceneDragDropEvent *event)
	This event handler, for event event, can be reimplemented to receive drag enter events for this item. More...

virtual void	dragLeaveEvent (QGraphicsSceneDragDropEvent *event)
	This event handler, for event event, can be reimplemented to receive drag leave events for this item. More...

virtual void	dragMoveEvent (QGraphicsSceneDragDropEvent *event)
	This event handler, for event event, can be reimplemented to receive drag move events for this item. More...

virtual void	dropEvent (QGraphicsSceneDragDropEvent *event)
	This event handler, for event event, can be reimplemented to receive drop events for this item. More...

virtual void	focusInEvent (QFocusEvent *event)
	This event handler, for event event, can be reimplemented to receive focus in events for this item. More...

virtual void	focusOutEvent (QFocusEvent *event)
	This event handler, for event event, can be reimplemented to receive focus out events for this item. More...

virtual void	hoverEnterEvent (QGraphicsSceneHoverEvent *event)
	This event handler, for event event, can be reimplemented to receive hover enter events for this item. More...

virtual void	hoverLeaveEvent (QGraphicsSceneHoverEvent *event)
	This event handler, for event event, can be reimplemented to receive hover leave events for this item. More...

virtual void	hoverMoveEvent (QGraphicsSceneHoverEvent *event)
	This event handler, for event event, can be reimplemented to receive hover move events for this item. More...

virtual void	inputMethodEvent (QInputMethodEvent *event)
	This event handler, for event event, can be reimplemented to receive input method events for this item. More...

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const
	This method is only relevant for input items. More...

virtual QVariant	itemChange (GraphicsItemChange change, const QVariant &value)
	This virtual function is called by QGraphicsItem to notify custom items that some part of the item's state changes. More...

virtual void	keyPressEvent (QKeyEvent *event)
	This event handler, for event event, can be reimplemented to receive key press events for this item. More...

virtual void	keyReleaseEvent (QKeyEvent *event)
	This event handler, for event event, can be reimplemented to receive key release events for this item. More...

virtual void	mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event)
	This event handler, for event event, can be reimplemented to receive mouse doubleclick events for this item. More...

virtual void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)
	This event handler, for event event, can be reimplemented to receive mouse move events for this item. More...

virtual void	mousePressEvent (QGraphicsSceneMouseEvent *event)
	This event handler, for event event, can be reimplemented to receive mouse press events for this item. More...

virtual void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event)
	This event handler, for event event, can be reimplemented to receive mouse release events for this item. More...

void	prepareGeometryChange ()
	Prepares the item for a geometry change. More...

	QGraphicsItem (QGraphicsItemPrivate &dd, QGraphicsItem parent, QGraphicsScene scene)

void	removeFromIndex ()
	Removes this item from the scene's index. More...

virtual bool	sceneEvent (QEvent *event)
	This virtual function receives events to this item. More...

virtual bool	sceneEventFilter (QGraphicsItem watched, QEvent event)
	Filters events for the item watched. More...

void	updateMicroFocus ()
	Updates the item's micro focus. More...

virtual void	wheelEvent (QGraphicsSceneWheelEvent *event)
	This event handler, for event event, can be reimplemented to receive wheel events for this item. More...

Additional Inherited Members
Protected Types inherited from QGraphicsItem
enum	Extension { UserExtension = 0x80000000 }
	Note: This is provided as a hook to avoid future problems related to adding virtual functions. More...

Protected Variables inherited from QGraphicsItem
QScopedPointer< QGraphicsItemPrivate >	d_ptr

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

Detailed Description

The QGraphicsLineItem class provides a line item that you can add to a QGraphicsScene.

Since: 4.2

To set the item's line, pass a QLineF to QGraphicsLineItem's constructor, or call the setLine() function. The line() function returns the current line. By default the line is black with a width of 0, but you can change this by calling setPen().

QGraphicsLineItem uses the line and the pen width to provide a reasonable implementation of boundingRect(), shape(), and contains(). The paint() function draws the line using the item's associated pen.

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

Definition at line 842 of file qgraphicsitem.h.

Enumerations

◆ anonymous enum

anonymous enum

Enumerator
Type

Definition at line 882 of file qgraphicsitem.h.

882 { Type = 6 };

QGraphicsLineItem::Type

Definition: qgraphicsitem.h:882

Constructors and Destructors

◆ QGraphicsLineItem() [1/3]

QGraphicsLineItem::QGraphicsLineItem ( QGraphicsItem * parent = 0 )

Constructs a QGraphicsLineItem.

parent is passed to QGraphicsItem's constructor.

See also: QGraphicsScene::addItem()

Definition at line 9797 of file qgraphicsitem.cpp.

     : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
 {
 }

◆ QGraphicsLineItem() [2/3]

QGraphicsLineItem::QGraphicsLineItem	(	const QLineF &	line,
		QGraphicsItem *	parent = `0`
	)

Constructs a QGraphicsLineItem, using line as the default line.

parent is passed to QGraphicsItem's constructor.

See also: QGraphicsScene::addItem()

Definition at line 9760 of file qgraphicsitem.cpp.

     : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
 {
     setLine(line);
 }

◆ QGraphicsLineItem() [3/3]

QGraphicsLineItem::QGraphicsLineItem	(	qreal	x1,
		qreal	y1,
		qreal	x2,
		qreal	y2,
		QGraphicsItem *	parent = `0`
	)

Constructs a QGraphicsLineItem, using the line between (x1, y1) and (x2, y2) as the default line.

parent is passed to QGraphicsItem's constructor.

See also: QGraphicsScene::addItem()

Definition at line 9778 of file qgraphicsitem.cpp.

     : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
 {
     setLine(x1, y1, x2, y2);
 }

◆ ~QGraphicsLineItem()

QGraphicsLineItem::~QGraphicsLineItem ( )

Destroys the QGraphicsLineItem.

Definition at line 9810 of file qgraphicsitem.cpp.

9811 {

9812 }

Functions

◆ boundingRect()

QRectF QGraphicsLineItem::boundingRect ( ) const

virtual

Reimplemented Function

Implements QGraphicsItem.

Definition at line 9884 of file qgraphicsitem.cpp.

 {
     Q_D(const QGraphicsLineItem);
     if (d->pen.widthF() == 0.0) {
         const qreal x1 = d->line.p1().x();
         const qreal x2 = d->line.p2().x();
         const qreal y1 = d->line.p1().y();
         const qreal y2 = d->line.p2().y();
         qreal lx = qMin(x1, x2);
         qreal rx = qMax(x1, x2);
         qreal ty = qMin(y1, y2);
         qreal by = qMax(y1, y2);
         return QRectF(lx, ty, rx - lx, by - ty);
     }
     return shape().controlPointRect();
 }

◆ contains()

bool QGraphicsLineItem::contains ( const QPointF & point ) const

virtual

Reimplemented Function

Reimplemented from QGraphicsItem.

Definition at line 9919 of file qgraphicsitem.cpp.

 {
     return QGraphicsItem::contains(point);
 }

◆ extension()

QVariant QGraphicsLineItem::extension ( const QVariant & variant ) const

protectedvirtual

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

Reimplemented from QGraphicsItem.

Definition at line 9983 of file qgraphicsitem.cpp.

 {
     Q_UNUSED(variant);
     return QVariant();
 }

◆ isObscuredBy()

bool QGraphicsLineItem::isObscuredBy ( const QGraphicsItem * item ) const

virtual

Reimplemented Function

Reimplemented from QGraphicsItem.

Definition at line 9941 of file qgraphicsitem.cpp.

 {
     return QGraphicsItem::isObscuredBy(item);
 }

◆ line()

QLineF QGraphicsLineItem::line ( ) const

Returns the item's line, or a null line if no line has been set.

See also: setLine()

Definition at line 9847 of file qgraphicsitem.cpp.

Referenced by setLine().

 {
     Q_D(const QGraphicsLineItem);
     return d->line;
 }

◆ opaqueArea()

QPainterPath QGraphicsLineItem::opaqueArea ( ) const

virtual

Reimplemented Function

Reimplemented from QGraphicsItem.

Definition at line 9949 of file qgraphicsitem.cpp.

 {
     return QGraphicsItem::opaqueArea();
 }

◆ paint()

void QGraphicsLineItem::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget = `0`
	)

virtual

Reimplemented Function

Implements QGraphicsItem.

Definition at line 9927 of file qgraphicsitem.cpp.

 {
     Q_D(QGraphicsLineItem);
     Q_UNUSED(widget);
     painter->setPen(d->pen);
     painter->drawLine(d->line);
 
     if (option->state & QStyle::State_Selected)
         qt_graphicsItem_highlightSelected(this, painter, option);
 }

◆ pen()

QPen QGraphicsLineItem::pen ( ) const

Returns the item's pen, or a black solid 0-width pen if no pen has been set.

See also: setPen()

Definition at line 9820 of file qgraphicsitem.cpp.

Referenced by setPen().

 {
     Q_D(const QGraphicsLineItem);
     return d->pen;
 }

◆ setExtension()

void QGraphicsLineItem::setExtension	(	Extension	extension,
		const QVariant &	variant
	)

protectedvirtual

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

Reimplemented from QGraphicsItem.

Definition at line 9974 of file qgraphicsitem.cpp.

 {
     Q_UNUSED(extension);
     Q_UNUSED(variant);
 }

◆ setLine() [1/2]

void QGraphicsLineItem::setLine ( const QLineF & line )

Sets the item's line to be the given line.

See also: line()

Definition at line 9858 of file qgraphicsitem.cpp.

Referenced by QGraphicsLineItem().

 {
     Q_D(QGraphicsLineItem);
     if (d->line == line)
         return;
     prepareGeometryChange();
     d->line = line;
     update();
 }

◆ setLine() [2/2]

void QGraphicsLineItem::setLine	(	qreal	x1,
		qreal	y1,
		qreal	x2,
		qreal	y2
	)

inline

Sets the item's line to be the line between (x1, y1) and (x2, y2).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

This is the same as calling {setLine(QLineF(x1, y1, x2, y2))}.

Definition at line 870 of file qgraphicsitem.h.

871 { setLine(QLineF(x1, y1, x2, y2)); }

QGraphicsLineItem::setLine

void setLine(const QLineF &line)

Sets the item's line to be the given line.

Definition: qgraphicsitem.cpp:9858

QLineF

The QLineF class provides a two-dimensional vector using floating point precision.

Definition: qline.h:212

◆ setPen()

void QGraphicsLineItem::setPen ( const QPen & pen )

Sets the item's pen to pen.

If no pen is set, the line will be painted using a black solid 0-width pen.

See also: pen()

Definition at line 9832 of file qgraphicsitem.cpp.

Referenced by QGraphicsScene::addLine().

 {
     Q_D(QGraphicsLineItem);
     if (d->pen == pen)
         return;
     prepareGeometryChange();
     d->pen = pen;
     update();
 }

◆ shape()

QPainterPath QGraphicsLineItem::shape ( ) const

virtual

Reimplemented Function

Reimplemented from QGraphicsItem.

Definition at line 9904 of file qgraphicsitem.cpp.

Referenced by boundingRect().

 {
     Q_D(const QGraphicsLineItem);
     QPainterPath path;
     if (d->line == QLineF())
         return path;
 
     path.moveTo(d->line.p1());
     path.lineTo(d->line.p2());
     return qt_graphicsItem_shapeFromPath(path, d->pen);
 }

◆ supportsExtension()

bool QGraphicsLineItem::supportsExtension ( Extension extension ) const

protectedvirtual

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

Reimplemented from QGraphicsItem.

Definition at line 9965 of file qgraphicsitem.cpp.

 {
     Q_UNUSED(extension);
     return false;
 }

◆ type()

int QGraphicsLineItem::type ( ) const

virtual

Reimplemented Function

Reimplemented from QGraphicsItem.

Definition at line 9957 of file qgraphicsitem.cpp.

 {
     return Type;
 }

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

/src/gui/graphicsview/qgraphicsitem.h
/src/gui/graphicsview/qgraphicsitem.cpp

Public Types

Public Functions

Protected Functions

Additional Inherited Members

Detailed Description

Enumerations

◆ anonymous enum

Constructors and Destructors

◆ QGraphicsLineItem() [1/3]

◆ QGraphicsLineItem() [2/3]

◆ QGraphicsLineItem() [3/3]

◆ ~QGraphicsLineItem()

Functions

◆ boundingRect()

◆ contains()

◆ extension()

◆ isObscuredBy()

◆ line()

◆ opaqueArea()

◆ paint()

◆ pen()

◆ setExtension()

◆ setLine() [1/2]

◆ setLine() [2/2]

◆ setPen()

◆ shape()

◆ supportsExtension()

◆ type()