内容

• 公共函数
• 重实现公共函数
• 详细描述

QGraphicsSimpleTextItem 类

QGraphicsSimpleTextItem class provides a simple text path item that you can add to a QGraphicsScene . 更多...

头：	#include <QGraphicsSimpleTextItem>
qmake:	QT += widgets
Since:	Qt 4.2
继承：	QAbstractGraphicsShapeItem

• 所有成员列表，包括继承成员

公共函数

	QGraphicsSimpleTextItem (QGraphicsItem * parent = Q_NULLPTR)
	QGraphicsSimpleTextItem (const QString & text , QGraphicsItem * parent = Q_NULLPTR)
	~QGraphicsSimpleTextItem ()
QFont	font () const
void	setFont (const QFont & font )
void	setText (const QString & text )
QString	text () const

重实现公共函数

virtual QRectF	boundingRect () const
virtual bool	contains (const QPointF & point ) const
virtual bool	isObscuredBy (const QGraphicsItem * item ) const
virtual QPainterPath	opaqueArea () const
virtual void	paint (QPainter * painter , const QStyleOptionGraphicsItem * option , QWidget * widget )
virtual QPainterPath	shape () const
virtual int	type () const

• 6 公共函数继承自 QAbstractGraphicsShapeItem
• 176 公共函数继承自 QGraphicsItem

额外继承成员

• 2 static public members inherited from QGraphicsItem
• 24 保护函数继承自 QGraphicsItem

详细描述

QGraphicsSimpleTextItem class provides a simple text path item that you can add to a QGraphicsScene .

To set the item's text, you can either pass a QString to QGraphicsSimpleTextItem 's constructor, or call setText () to change the text later. To set the text fill color, call setBrush ().

The simple text item can have both a fill and an outline; setBrush () will set the text fill (i.e., text color), and setPen () sets the pen that will be used to draw the text outline. (The latter can be slow, especially for complex pens, and items with long text content.) If all you want is to draw a simple line of text, you should call setBrush () only, and leave the pen unset; QGraphicsSimpleTextItem 's pen is by default Qt::NoPen .

QGraphicsSimpleTextItem uses the text's formatted size and the associated font to provide a reasonable implementation of boundingRect (), shape ()，和 contains (). You can set the font by calling setFont ().

QGraphicsSimpleText 不显示富文本；相反，可使用 QGraphicsTextItem ，其提供完整文本控制能力。

另请参阅 QGraphicsTextItem , QGraphicsPathItem , QGraphicsRectItem , QGraphicsEllipseItem , QGraphicsPixmapItem , QGraphicsPolygonItem , QGraphicsLineItem ，和 图形视图框架 .

成员函数文档编制

QGraphicsSimpleTextItem:: QGraphicsSimpleTextItem ( QGraphicsItem * parent = Q_NULLPTR)

构造 QGraphicsSimpleTextItem .

parent 会被传递给 QGraphicsItem 的构造函数。

另请参阅 QGraphicsScene::addItem ().

QGraphicsSimpleTextItem:: QGraphicsSimpleTextItem (const QString & text , QGraphicsItem * parent = Q_NULLPTR)

构造 QGraphicsSimpleTextItem ，使用 text 作为默认纯文本。

parent 会被传递给 QGraphicsItem 的构造函数。

另请参阅 QGraphicsScene::addItem ().

QGraphicsSimpleTextItem:: ~QGraphicsSimpleTextItem ()

销毁 QGraphicsSimpleTextItem .

[virtual] QRectF QGraphicsSimpleTextItem:: boundingRect () const

重实现自 QGraphicsItem::boundingRect ().

[virtual] bool QGraphicsSimpleTextItem:: contains (const QPointF & point ) const

重实现自 QGraphicsItem::contains ().

QFont QGraphicsSimpleTextItem:: font () const

返回用于绘制项文本的字体。

另请参阅 setFont ().

[virtual] bool QGraphicsSimpleTextItem:: isObscuredBy (const QGraphicsItem * item ) const

重实现自 QGraphicsItem::isObscuredBy ().

[virtual] QPainterPath QGraphicsSimpleTextItem:: opaqueArea () const

重实现自 QGraphicsItem::opaqueArea ().

[virtual] void QGraphicsSimpleTextItem:: paint ( QPainter * painter , const QStyleOptionGraphicsItem * option , QWidget * widget )

重实现自 QGraphicsItem::paint ().

void QGraphicsSimpleTextItem:: setFont (const QFont & font )

Sets the font that is used to draw the item's text to font .

另请参阅 font ().

void QGraphicsSimpleTextItem:: setText (const QString & text )

Sets the item's text to text . The text will be displayed as plain text. Newline characters ('\n') as well as characters of type QChar::LineSeparator will cause item to break the text into multiple lines.

另请参阅 text ().

[virtual] QPainterPath QGraphicsSimpleTextItem:: shape () const

重实现自 QGraphicsItem::shape ().

QString QGraphicsSimpleTextItem:: text () const

返回项的文本。

另请参阅 setText ().

[virtual] int QGraphicsSimpleTextItem:: type () const

重实现自 QGraphicsItem::type ().