Curved arrows. More...

#include <bezier-arrow.h>

Inheritance diagram for gccv::BezierArrow:

Public Member Functions
	BezierArrow (Canvas *canvas)
	BezierArrow (Group parent, ItemClient client=NULL)
virtual	~BezierArrow ()
double	Distance (double x, double y, Item **item) const
void	Draw (cairo_t *cr, bool is_vector) const
void	Move (double x, double y)
void	GetControlPoints (double &x0, double &y0, double &x1, double &y1, double &x2, double &y2, double &x3, double &y3)
void	SetControlPoints (double x0, double y0, double x1, double y1, double x2, double y2, double x3, double y3)
void	SetHead (ArrowHeads val)
ArrowHeads	GetHead (void) const
void	SetA (double val)
double	GetA (void) const
void	SetB (double val)
double	GetB (void) const
void	SetC (double val)
double	GetC (void) const
void	SetShowControls (bool val)
bool	GetShowControls (void) const
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 ()

Additional Inherited Members
Protected Attributes inherited from gccv::Item
double	m_x0
double	m_y0
double	m_x1
double	m_y1

Detailed Description

Curved arrows.

Arrow composed of a Bezier cubic curve and an arrow head.

Definition at line 40 of file bezier-arrow.h.

Constructor & Destructor Documentation

gccv::BezierArrow::BezierArrow ( Canvas * canvas )

Parameters

canvas a Canvas.

Creates a new BezierArrow with a full head and sets it as a child of the root Group of canvas.

gccv::BezierArrow::BezierArrow	(	Group *	parent,
		ItemClient *	client = `NULL`
	)

Parameters

parent	the Group to which the new BezierArrow will be added.
client	the ItemClient for the new BezierArrow if any.

Creates a new BezierArrow with a full head inside parent and sets client as its associated ItemClient.

virtual gccv::BezierArrow::~BezierArrow ( )

virtual

The destructor.

Member Function Documentation

double gccv::BezierArrow::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 BezierArrow class. Sets item to this.

Reimplemented from gccv::Item.

void gccv::BezierArrow::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 BezierArrow to cr.

Reimplemented from gccv::Item.

gccv::BezierArrow::GetA ( void ) const

inline

Returns: the distance from tip of arrowhead to center.

Definition at line 139 of file bezier-arrow.h.

gccv::BezierArrow::GetB ( void ) const

inline

Returns: the distance from tip of arrowhead to trailing point, measured along shaft.

Definition at line 149 of file bezier-arrow.h.

gccv::BezierArrow::GetC ( void ) const

inline

Returns: the distance of arrowhead trailing points from outside edge of shaft.

Definition at line 158 of file bezier-arrow.h.

void gccv::BezierArrow::GetControlPoints	(	double &	x0,
		double &	y0,
		double &	x1,
		double &	y1,
		double &	x2,
		double &	y2,
		double &	x3,
		double &	y3
	)

Parameters

x0	where to store the horizontal coordinate of the first control point.
y0	where to store the horizontal coordinate of the first control point.
x1	where to store the horizontal coordinate of the second control point.
y1	where to store the horizontal coordinate of the second control point.
x2	where to store the horizontal coordinate of the third control point.
y2	where to store the horizontal coordinate of the third control point.
x3	where to store the horizontal coordinate of the fourth control point.
y3	where to store the horizontal coordinate of the fourth control point.

Retrieves the coordinates of the four control points used to build the Bezier cubic curve.

gccv::BezierArrow::GetHead ( void ) const

inline

Returns: the ArrowHeads for the end position of the arrow.

Definition at line 130 of file bezier-arrow.h.

gccv::BezierArrow::GetShowControls ( void ) const

inline

Returns: whether the controlpoints are currently displayed (if the arrow is visible, see Item::SetVisible()).

Definition at line 169 of file bezier-arrow.h.

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

virtual

Parameters

x	the horizontal deplacement
y	the vertical deplacement

Moves the BezierArrow.

Reimplemented from gccv::Item.

gccv::BezierArrow::SetA ( double A )

inline

Parameters

A	new arrow head size parameter.

Sets the distance from tip of arrowhead to center.

Definition at line 139 of file bezier-arrow.h.

gccv::BezierArrow::SetB ( double B )

inline

Parameters

B	new arrow head size parameter.

Sets the distance from tip of arrowhead to trailing point, measured along shaft.

Definition at line 149 of file bezier-arrow.h.

gccv::BezierArrow::SetC ( double C )

inline

Parameters

C	new arrow head size parameter.

Sets the distance of arrowhead trailing points from outside edge of shaft.

Definition at line 158 of file bezier-arrow.h.

void gccv::BezierArrow::SetControlPoints	(	double	x0,
		double	y0,
		double	x1,
		double	y1,
		double	x2,
		double	y2,
		double	x3,
		double	y3
	)

Parameters

x0	the new horizontal coordinate of the first control point.
y0	the new horizontal coordinate of the first control point.
x1	the new horizontal coordinate of the second control point.
y1	the new horizontal coordinate of the second control point.
x2	the new horizontal coordinate of the third control point.
y2	the new horizontal coordinate of the third control point.
x3	the new horizontal coordinate of the fourth control point.
y3	the new horizontal coordinate of the fourth control point.

Sets the coordinates of the four control points used to build the Bezier cubic curve.

gccv::BezierArrow::SetHead ( ArrowHeads Head )

inline

Parameters

Head	the ArrowHeads for the end position of the arrow.

Sets the arrow head type at the segment end position.

Definition at line 130 of file bezier-arrow.h.

gccv::BezierArrow::SetShowControls ( bool ShowControls )

inline

Parameters

ShowControls whether to show control points.

If set to true, the control points will be displayed as squares. Lhe size of these squares is five times the line witdth.

Definition at line 169 of file bezier-arrow.h.

void gccv::BezierArrow::UpdateBounds ( )

protectedvirtual

Evaluates the BezierArrow bounds.

Reimplemented from gccv::Item.

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

bezier-arrow.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation