gccv::Line Class Reference

Straight lines. More...

#include <line.h>

Inheritance diagram for gccv::Line:

Public Member Functions
	Line (Canvas *canvas, double xstart, double ystart, double xend, double yend)
	Line (Group *parent, double xstart, double ystart, double xend, double yend, ItemClient *client=NULL)
virtual	~Line ()
void	SetPosition (double xstart, double ystart, double xend, double yend)
double	Distance (double x, double y, Item **item) const
void	Draw (cairo_t *cr, bool is_vector) const
void	Move (double x, double y)
Public Member Functions inherited from gccv::LineItem
	LineItem (Canvas *canvas)
	LineItem (Group *parent, ItemClient *client=NULL)
virtual	~LineItem ()
GOColor	GetEffectiveLineColor () const
void	ApplyLine (cairo_t *cr) const
void	SetDashes (double const *dashes, int num_dashes, double offset)
void	SetLineWidth (double val)
double	GetLineWidth (void) const
void	SetLineColor (GOColor val)
GOColor	GetLineColor (void) const
void	SetAutoColor (bool val)
bool	GetAutoColor (void) const
Public Member Functions inherited from gccv::Item
	Item (Canvas *canvas)
	Item (Group *parent, ItemClient *client=NULL)
virtual	~Item ()
void	GetBounds (double &x0, double &y0, double &x1, double &y1) const
void	Invalidate () const
void	SetVisible (bool visible)
virtual void	BuildPath (cairo_t *cr) const
virtual bool	Draw (cairo_t *cr, double x0, double y0, double x1, double y1, bool is_vector) const
bool	IsTopLevel () const
void	SetClient (ItemClient *val)
ItemClient *	GetClient (void)
Group const *	GetParent (void) const
bool	GetVisible (void) const
void	SetOperator (cairo_operator_t val)
cairo_operator_t	GetOperator (void) const

Protected Member Functions
void	UpdateBounds ()

Protected Attributes
double	m_xstart
double	m_ystart
double	m_xend
double	m_yend

Detailed Description

Straight lines.

Implements one segment straight lines.

Definition at line 39 of file gccv/line.h.

Constructor & Destructor Documentation

gccv::Line::Line	(	Canvas *	canvas,
		double	xstart,
		double	ystart,
		double	xend,
		double	yend
	)

Parameters

canvas	a Canvas.
xstart	the horizontal start position.
ystart	the vertical start position.
xend	the horizontal end position.
yend	the vertical end position.

Creates a new Line sets it as a child of the root Group of canvas.

gccv::Line::Line	(	Group *	parent,
		double	xstart,
		double	ystart,
		double	xend,
		double	yend,
		ItemClient *	client = NULL
	)

Parameters

parent	the Group to which the new Line will be added.
xstart	the horizontal start position.
ystart	the vertical start position.
xend	the horizontal end position.
yend	the vertical end position.
client	the ItemClient for the new Line if any.

Creates a new Line inside parent and sets client as its associated ItemClient.

virtual gccv::Line::~Line ( )

virtual

The destructor.

Member Function Documentation

double gccv::Line::Distance ( double  x, double  y, Item **  item  ) const

virtual

Parameters

x	horizontal position
y	vertical position
item	where to store the Item.

Implementation of Item::Distance() for the Line class. Sets item to this.

Reimplemented from gccv::Item.

Reimplemented in gccv::Arrow.

void gccv::Line::Draw ( cairo_t *  cr, bool  is_vector  ) const

virtual

Parameters

cr	a cairo_t.
is_vector	whether the cairo_t is a vectorial context.

Draws the Line to cr.

Reimplemented from gccv::Item.

Reimplemented in gccv::Arrow.

void gccv::Line::Move ( double  x, double  y  )

virtual

Parameters

x	the horizontal deplacement
y	the vertical deplacement

Moves the Line.

Reimplemented from gccv::Item.

void gccv::Line::SetPosition	(	double	xstart,
		double	ystart,
		double	xend,
		double	yend
	)

Parameters

xstart	the new horizontal start position.
ystart	the new vertical start position.
xend	the new horizontal end position.
yend	the new vertical end position.

Sets the Line position.

void gccv::Line::UpdateBounds ( )

protectedvirtual

Evaluates the Line bounds.

Reimplemented from gccv::Item.

Reimplemented in gccv::Arrow.

Member Data Documentation

double gccv::Line::m_xend

protected

The horizontal end position.

Definition at line 120 of file gccv/line.h.

double gccv::Line::m_xstart

protected

The horizontal start position.

Definition at line 112 of file gccv/line.h.

double gccv::Line::m_yend

protected

The vertical end position.

Definition at line 124 of file gccv/line.h.

double gccv::Line::m_ystart

protected

The vertical start position.

Definition at line 116 of file gccv/line.h.

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The documentation for this class was generated from the following file:

• gccv/line.h