内容

• 公共函数
• 重实现公共函数
• 重实现保护函数
• 详细描述

Q3CanvasText Class

The Q3CanvasText class provides a text object on a Q3Canvas . 更多...

头：	#include <Q3CanvasText>
继承：	Q3CanvasItem

• 所有成员列表，包括继承成员

公共函数

	Q3CanvasText (Q3Canvas * canvas )
	Q3CanvasText (const QString & t , Q3Canvas * canvas )
	Q3CanvasText (const QString & t , QFont f , Q3Canvas * canvas )
virtual	~Q3CanvasText ()
QColor	color () const
QFont	font () const
void	setColor (const QColor & c )
void	setFont (const QFont & f )
void	setText (const QString & t )
void	setTextFlags (int f )
QString	text () const
int	textFlags () const

重实现公共函数

virtual QRect	boundingRect () const
virtual bool	collidesWith (const Q3CanvasItem * i ) const
virtual void	moveBy (double dx , double dy )
virtual int	rtti () const

• 34 公共函数继承自 Q3CanvasItem

重实现保护函数

virtual void

draw (QPainter & painter )

• 1 保护函数继承自 Q3CanvasItem

详细描述

The Q3CanvasText class provides a text object on a Q3Canvas .

A canvas text item has text with font, color and alignment attributes. The text and font can be set in the constructor or set or changed later with setText () 和 setFont (). The color is set with setColor () and the alignment with setTextFlags (). The text item's bounding rectangle is retrieved with boundingRect ().

The text can be drawn on a painter with draw ().

Like any other canvas item text items can be moved with Q3CanvasItem::move () 和 Q3CanvasItem::moveBy (), or by setting coordinates with Q3CanvasItem::setX (), Q3CanvasItem::setY () 和 Q3CanvasItem::setZ ().

另请参阅 QtCanvas and Porting to Graphics View .

成员函数文档编制

Q3CanvasText:: Q3CanvasText ( Q3Canvas * canvas )

构造 Q3CanvasText with the text "<text>", on canvas .

Q3CanvasText:: Q3CanvasText (const QString & t , Q3Canvas * canvas )

构造 Q3CanvasText with the text t , on canvas canvas .

Q3CanvasText:: Q3CanvasText (const QString & t , QFont f , Q3Canvas * canvas )

构造 Q3CanvasText with the text t and font f , on the canvas canvas .

[虚拟] Q3CanvasText:: ~Q3CanvasText ()

Destroys the canvas text item.

[虚拟] QRect Q3CanvasText:: boundingRect () const

重实现自 Q3CanvasItem::boundingRect ().

Returns the bounding rectangle of the text.

[虚拟] bool Q3CanvasText:: collidesWith (const Q3CanvasItem * i ) const

重实现自 Q3CanvasItem::collidesWith ().

QColor Q3CanvasText:: color () const

Returns the color of the text.

另请参阅 setColor ().

[virtual protected] void Q3CanvasText:: draw ( QPainter & painter )

重实现自 Q3CanvasItem::draw ().

Draws the text using the painter painter .

QFont Q3CanvasText:: font () const

Returns the font in which the text is drawn.

另请参阅 setFont ().

[虚拟] void Q3CanvasText:: moveBy ( double dx , double dy )

重实现自 Q3CanvasItem::moveBy ().

[虚拟] int Q3CanvasText:: rtti () const

重实现自 Q3CanvasItem::rtti ().

Returns 3 ( Q3CanvasItem::Rtti_Text ).

另请参阅 Q3CanvasItem::rtti ().

void Q3CanvasText:: setColor (const QColor & c )

Sets the color of the text to the color c .

另请参阅 color () 和 setFont ().

void Q3CanvasText:: setFont (const QFont & f )

Sets the font in which the text is drawn to font f .

另请参阅 font ().

void Q3CanvasText:: setText (const QString & t )

Sets the text item's text to t . The text may contain newlines.

另请参阅 text (), setFont (), setColor ()，和 setTextFlags ().

void Q3CanvasText:: setTextFlags ( int f )

Sets the alignment flags to f . These are a bitwise OR of the flags available to QPainter::drawText () -- see the Qt::AlignmentFlag 。

另请参阅 textFlags (), setFont ()，和 setColor ().

QString Q3CanvasText:: text () const

Returns the text item's text.

另请参阅 setText ().

int Q3CanvasText:: textFlags () const

Returns the currently set alignment flags.

另请参阅 setTextFlags () 和 Qt::AlignmentFlag .