内容

• 公共类型
• 公共函数
• 重实现公共函数
• 详细描述

QGraphicsSimpleTextItem 类

QGraphicsSimpleTextItem 类提供简单文本路径项，其可被添加到 QGraphicsScene . 更多...

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

该类在 Qt 4.2 引入。

• 所有成员列表，包括继承成员

公共类型

enum	anonymous { Type }

公共函数

	QGraphicsSimpleTextItem (const QString & text , QGraphicsItem * parent = nullptr)
	QGraphicsSimpleTextItem (QGraphicsItem * parent = nullptr)
virtual	~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 override
virtual bool	contains (const QPointF & point ) const override
virtual bool	isObscuredBy (const QGraphicsItem * item ) const override
virtual QPainterPath	opaqueArea () const override
virtual void	paint (QPainter * painter , const QStyleOptionGraphicsItem * option , QWidget * widget ) override
virtual QPainterPath	shape () const override
virtual int	type () const override

详细描述

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 .

成员类型文档编制

enum QGraphicsSimpleTextItem:: anonymous

值的返回通过虚拟 type () 函数。

常量	值	描述
QGraphicsSimpleTextItem::Type	9	A graphics simple text item

成员函数文档编制

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

构造 QGraphicsSimpleTextItem。

parent 会被传递给 QGraphicsItem 的构造函数。

另请参阅 QGraphicsScene::addItem ().

[virtual] QGraphicsSimpleTextItem:: ~QGraphicsSimpleTextItem ()

销毁 QGraphicsSimpleTextItem .

[override virtual] QRectF QGraphicsSimpleTextItem:: boundingRect () const

重实现： QGraphicsItem::boundingRect () const.

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

重实现： QGraphicsItem::contains (const QPointF &point) const.

QFont QGraphicsSimpleTextItem:: font () const

返回用于绘制项文本的字体。

另请参阅 setFont ().

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

重实现： QAbstractGraphicsShapeItem::isObscuredBy (const QGraphicsItem *item) const.

[override virtual] QPainterPath QGraphicsSimpleTextItem:: opaqueArea () const

重实现： QAbstractGraphicsShapeItem::opaqueArea () const.

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

重实现： QGraphicsItem::paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget).

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 ().

[override virtual] QPainterPath QGraphicsSimpleTextItem:: shape () const

重实现： QGraphicsItem::shape () const.

QString QGraphicsSimpleTextItem:: text () const

返回项的文本。

另请参阅 setText ().

[override virtual] int QGraphicsSimpleTextItem:: type () const

重实现： QGraphicsItem::type () const.