Contents

• Public Functions
• Reimplemented Public Functions
• Detailed Description

Detailed Description

TheQGraphicsLineItem class provides a line item that you can add to aQGraphicsScene.

To set the item's line, pass aQLineF toQGraphicsLineItem's constructor, or call thesetLine() function. Theline() function returns the current line. By default the line is black with a width of 0, but you can change this by callingsetPen().

QGraphicsLineItem uses the line and the pen width to provide a reasonable implementation ofboundingRect(),shape(), andcontains(). Thepaint() function draws the line using the item's associated pen.

Member Function Documentation

QGraphicsLineItem::QGraphicsLineItem(QGraphicsItem * parent = 0)

Constructs aQGraphicsLineItem.parent is passed toQGraphicsItem's constructor.

See alsoQGraphicsScene::addItem().

QGraphicsLineItem::QGraphicsLineItem(constQLineF & line,QGraphicsItem * parent = 0)

Constructs aQGraphicsLineItem, usingline as the default line.parent is passed toQGraphicsItem's constructor.

See alsoQGraphicsScene::addItem().

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

Constructs aQGraphicsLineItem, using the line between (x1,y1) and (x2,y2) as the default line.parent is passed toQGraphicsItem's constructor.

See alsoQGraphicsScene::addItem().

QGraphicsLineItem::~QGraphicsLineItem()

Destroys theQGraphicsLineItem.

[virtual]QRectF QGraphicsLineItem::boundingRect() const

Reimplemented fromQGraphicsItem::boundingRect().

[virtual]bool QGraphicsLineItem::contains(constQPointF & point) const

Reimplemented fromQGraphicsItem::contains().

[virtual]bool QGraphicsLineItem::isObscuredBy(constQGraphicsItem * item) const

Reimplemented fromQGraphicsItem::isObscuredBy().

QLineF QGraphicsLineItem::line() const

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

See alsosetLine().

[virtual]QPainterPath QGraphicsLineItem::opaqueArea() const

Reimplemented fromQGraphicsItem::opaqueArea().

[virtual]void QGraphicsLineItem::paint(QPainter * painter, constQStyleOptionGraphicsItem * option,QWidget * widget = 0)

Reimplemented fromQGraphicsItem::paint().

QPen QGraphicsLineItem::pen() const

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

See alsosetPen().

void QGraphicsLineItem::setLine(constQLineF & line)

Sets the item's line to be the givenline.

See alsoline().

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

This is an overloaded function.

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

This is the same as callingsetLine(QLineF(x1, y1, x2, y2)).

void QGraphicsLineItem::setPen(constQPen & pen)

Sets the item's pen topen. If no pen is set, the line will be painted using a black solid 0-width pen.

See alsopen().

[virtual]QPainterPath QGraphicsLineItem::shape() const

Reimplemented fromQGraphicsItem::shape().

[virtual]int QGraphicsLineItem::type() const

Reimplemented fromQGraphicsItem::type().