内容

• 公共函数
• 重实现公共函数
• 重实现保护函数
• 详细描述

Q3CanvasLine Class

The Q3CanvasLine class provides a line on a Q3Canvas . 更多...

头：	#include <Q3CanvasLine>
继承：	Q3CanvasPolygonalItem

• 所有成员列表，包括继承成员

公共函数

	Q3CanvasLine (Q3Canvas * canvas )
	~Q3CanvasLine ()
QPoint	endPoint () const
void	setPoints (int xa , int ya , int xb , int yb )
QPoint	startPoint () const

重实现公共函数

virtual void	moveBy (double dx , double dy )
virtual int	rtti () const
virtual void	setPen (QPen p )

• 9 公共函数继承自 Q3CanvasPolygonalItem
• 34 公共函数继承自 Q3CanvasItem

重实现保护函数

virtual Q3PointArray	areaPoints () const
virtual void	drawShape (QPainter & p )

• 6 保护函数继承自 Q3CanvasPolygonalItem
• 1 保护函数继承自 Q3CanvasItem

详细描述

The Q3CanvasLine class provides a line on a Q3Canvas .

The line inherits functionality from Q3CanvasPolygonalItem , for example the setPen () function. The start and end points of the line are set with setPoints ().

Like any other canvas item lines 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

Q3CanvasLine:: Q3CanvasLine ( Q3Canvas * canvas )

Constructs a line from (0,0) to (0,0) on canvas .

另请参阅 setPoints ().

Q3CanvasLine:: ~Q3CanvasLine ()

Destroys the line.

[virtual protected] Q3PointArray Q3CanvasLine:: areaPoints () const

重实现自 Q3CanvasPolygonalItem::areaPoints ().

Note that the area defined by the line is somewhat thicker than the line that is actually drawn.

[virtual protected] void Q3CanvasLine:: drawShape ( QPainter & p )

重实现自 Q3CanvasPolygonalItem::drawShape ().

QPoint Q3CanvasLine:: endPoint () const

Returns the end point of the line.

另请参阅 setPoints () 和 startPoint ().

[虚拟] void Q3CanvasLine:: moveBy ( double dx , double dy )

重实现自 Q3CanvasItem::moveBy ().

[虚拟] int Q3CanvasLine:: rtti () const

重实现自 Q3CanvasItem::rtti ().

Returns 7 ( Q3CanvasItem::Rtti_Line ).

另请参阅 Q3CanvasItem::rtti ().

[虚拟] void Q3CanvasLine:: setPen ( QPen p )

重实现自 Q3CanvasPolygonalItem::setPen ().

void Q3CanvasLine:: setPoints ( int xa , int ya , int xb , int yb )

Sets the line's start point to ( xa , ya ) and its end point to ( xb , yb ).

QPoint Q3CanvasLine:: startPoint () const

Returns the start point of the line.

另请参阅 setPoints () 和 endPoint ().