A line between two points with an arrow at one extremity. More...

#include <Board/Shapes.h>

Inheritance diagram for LibBoard::Arrow:

Public Member Functions
	Arrow (double x1, double y1, double x2, double y2, DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depth=-1)

const std::string &	name () const

Arrow	rotated (double angle, const Point &center) const

Arrow	rotated (double angle) const

Arrow	translated (double dx, double dy) const

Arrow	scaled (double sx, double sy) const

Arrow	scaled (double s) const

void	flushPostscript (std::ostream &stream, const TransformEPS &transform) const

void	flushFIG (std::ostream &stream, const TransformFIG &transform, std::map< DGtal::Color, int > &colormap) const

void	flushSVG (std::ostream &stream, const TransformSVG &transform) const

void	flushCairo (cairo_t *cr, const TransformCairo &transform) const

void	flushTikZ (std::ostream &stream, const TransformTikZ &transform) const

Arrow *	clone () const

Public Member Functions inherited from LibBoard::Line
	Line (double x1, double y1, double x2, double y2, DGtal::Color color, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depth=-1)

const std::string &	name () const

Point	center () const

Line &	rotate (double angle, const Point &center)

Line	rotated (double angle, const Point &center) const

Line &	rotate (double angle)

Line	rotated (double angle) const

Line &	translate (double dx, double dy)

Line	translated (double dx, double dy) const

Shape &	scale (double sx, double sy)

Shape &	scale (double s)

Line	scaled (double sx, double sy) const

Line	scaled (double s) const

void	scaleAll (double s)

void	flushPostscript (std::ostream &stream, const TransformEPS &transform) const

void	flushFIG (std::ostream &stream, const TransformFIG &transform, std::map< DGtal::Color, int > &colormap) const

void	flushSVG (std::ostream &stream, const TransformSVG &transform) const

void	flushCairo (cairo_t *cr, const TransformCairo &transform) const

void	flushTikZ (std::ostream &stream, const TransformTikZ &transform) const

Rect	boundingBox () const

Line *	clone () const

Public Member Functions inherited from LibBoard::Shape
	Shape (DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, LineStyle style, const LineCap cap, const LineJoin join, int depth)

virtual	~Shape ()

bool	filled () const

Shape &	rotateDeg (double angle, const Point &center)

Shape &	rotateDeg (double angle)

Rect	bbox ()

Shape &	operator-- ()

Shape &	operator++ ()

int	depth () const

virtual void	depth (int)

virtual void	shiftDepth (int shift)

const DGtal::Color &	penColor () const

const DGtal::Color &	fillColor () const

Static Private Attributes
static const std::string	_name

Additional Inherited Members
Public Types inherited from LibBoard::Shape
enum	LineCap { ButtCap = 0 , RoundCap , SquareCap }

enum	LineJoin { MiterJoin = 0 , RoundJoin , BevelJoin }

enum	LineStyle { SolidStyle = 0 , DashStyle , DotStyle , DashDotStyle , DashDotDotStyle , DashDotDotDotStyle }

Protected Member Functions inherited from LibBoard::Shape
std::string	svgProperties (const TransformSVG &transform) const

std::string	postscriptProperties () const

void	setCairoDashStyle (cairo_t *cr, LineStyle type) const

std::string	tikzProperties (const TransformTikZ &transform) const

Protected Attributes inherited from LibBoard::Line
double	_x1

double	_y1

double	_x2

double	_y2

Protected Attributes inherited from LibBoard::Shape
int	_depth

DGtal::Color	_penColor

DGtal::Color	_fillColor

double	_lineWidth

LineStyle	_lineStyle

LineCap	_lineCap

LineJoin	_lineJoin

Detailed Description

A line between two points with an arrow at one extremity.

The arrow structure.

Definition at line 665 of file Board/Shapes.h.

Constructor & Destructor Documentation

◆ Arrow()

LibBoard::Arrow::Arrow	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		DGtal::Color	penColor,
		DGtal::Color	fillColor,
		double	lineWidth,
		const LineStyle	style = SolidStyle,
		const LineCap	cap = ButtCap,
		const LineJoin	join = MiterJoin,
		int	depth = -1 )

inline

Constructs an arrow.

Parameters

x1	First coordinate of the start point.
y1	Second coordinate of the start point.
x2	First coordinate of the end point.
y2	Second coordinate of the end point.
penColor	The color of the line.
fillColor	The fill color of the sharp end.
lineWidth	The line thickness.
style	Line style.
cap	Line cap.
join	Line join.
depth	The depth of the line.

Referenced by clone().

Member Function Documentation

◆ clone()

Arrow * LibBoard::Arrow::clone ( ) const

virtual

Return a copy of the shape.

Returns: copye of the shape.

Implements LibBoard::Shape.

Definition at line 788 of file Shapes.cpp.

                   {
    return new Arrow(*this);
}

References Arrow().

◆ flushCairo()

void LibBoard::Arrow::flushCairo	(	cairo_t *	cr,
		const TransformCairo &	transform ) const

virtual

Writes the cairo code of the shape in a cairo drawing context according to a transform.

Parameters

cr	The cairo drawing context.
transform	A 2D transform to be applied.

Implements LibBoard::Shape.

Definition at line 933 of file Shapes.cpp.

{
    double dx = _x1 - _x2;
    double dy = _y1 - _y2;
    double norm = sqrt( dx*dx + dy*dy );
    dx /= norm;
    dy /= norm;
    dx *= 10 * _lineWidth;
    dy *= 10 * _lineWidth;
 
    //   double back_x = 0.8 * dx + _x2;
    //   double back_y = 0.8 * dy + _y2;
 
    double ndx1 = dx*cos(0.3)-dy*sin(0.3);
    double ndy1 = dx*sin(0.3)+dy*cos(0.3);
    double ndx2 = dx*cos(-0.3)-dy*sin(-0.3);
    double ndy2 = dx*sin(-0.3)+dy*cos(-0.3);
    
    cairo_save (cr);
    
      // The line
      cairo_set_source_rgba (cr, _penColor.red()/255.0, _penColor.green()/255.0, _penColor.blue()/255.0, 1.);
      
      cairo_move_to (cr, transform.mapX( _x1 ), transform.mapY( _y1 ));
      cairo_line_to (cr, transform.mapX( _x2 + ( dx * cos(0.3) ) ), transform.mapY( _y2 + ( dy * cos(0.3) ) ));
      
      cairo_set_line_width (cr, _lineWidth);
      cairo_set_line_cap (cr, cairoLineCap[_lineCap]);
      cairo_set_line_join (cr, cairoLineJoin[_lineJoin]);
      setCairoDashStyle (cr, _lineStyle);
      
      cairo_stroke (cr);
      
      // The arrow
      cairo_set_source_rgba (cr, _fillColor.red()/255.0, _fillColor.green()/255.0, _fillColor.blue()/255.0, 1.);
      
      cairo_move_to (cr, transform.mapX( _x2 ) + transform.scale( ndx1 ), transform.mapY( _y2 ) - transform.scale( ndy1 ));
      cairo_line_to (cr, transform.mapX( _x2 ), transform.mapY( _y2 ));
      cairo_line_to (cr, transform.mapX( _x2 ) + transform.scale( ndx2 ), transform.mapY( _y2 ) - transform.scale( ndy2 ));
      cairo_close_path (cr);
 
      if ( filled() )
      {
  if ( _penColor != DGtal::Color::None )
    cairo_fill_preserve (cr);
  else
    cairo_fill (cr);
      }
      
      //
      
      if ( _penColor != DGtal::Color::None )
      {
  cairo_set_source_rgba (cr, _penColor.red()/255.0, _penColor.green()/255.0, _penColor.blue()/255.0, 1.);
  
  cairo_set_line_width (cr, _lineWidth);
  cairo_set_line_cap (cr, cairoLineCap[ButtCap]);
  cairo_set_line_join (cr, cairoLineJoin[MiterJoin]);
  setCairoDashStyle (cr, SolidStyle);
 
  cairo_stroke (cr);
      }
    
    cairo_restore (cr);
}

References LibBoard::Shape::_fillColor, LibBoard::Shape::_lineCap, LibBoard::Shape::_lineJoin, LibBoard::Shape::_lineStyle, LibBoard::Shape::_lineWidth, LibBoard::Shape::_penColor, LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, DGtal::Color::blue(), LibBoard::Shape::ButtCap, LibBoard::Shape::filled(), DGtal::Color::green(), LibBoard::Shape::MiterJoin, DGtal::Color::None, DGtal::Color::red(), LibBoard::Shape::setCairoDashStyle(), and LibBoard::Shape::SolidStyle.

◆ flushFIG()

void LibBoard::Arrow::flushFIG	(	std::ostream &	stream,
		const TransformFIG &	transform,
		std::map< DGtal::Color, int > &	colormap ) const

virtual

Writes the FIG code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.
colormap	A colormap.

Implements LibBoard::Shape.

Definition at line 847 of file Shapes.cpp.

{
    stream << "2 1 ";
    // Line style
    stream << _lineStyle << " ";
    // Thickness
    stream << ( _penColor.valid()?transform.mapWidth( _lineWidth ):0 ) << " ";
    // Pen color
    stream << colormap[ _penColor ] << " ";
    // Fill color
    stream << colormap[ _penColor ] << " ";
    // Depth
    stream << transform.mapDepth( _depth ) << " ";
    // Pen style
    stream <<  "-1 ";
    // Area fill, style val, join style, cap style, radius, f_arrow, b_arrow
    stream << "-1 " << (_lineStyle?"4.000 ":"0.000 ") << _lineJoin << " " << _lineCap << " -1 1 0 ";
    // Number of points
    stream << "2\n";
    if ( filled() )
        stream << "       1 1 1.00 60.00 120.00\n";
    else
        stream << "       1 0 1.00 60.00 120.00\n";
    stream << "         ";
    stream << static_cast<int>( transform.mapX( _x1 ) ) << " "
    << static_cast<int>( transform.mapY( _y1 ) ) << " "
    << static_cast<int>( transform.mapX( _x2 ) ) << " "
    << static_cast<int>( transform.mapY( _y2 ) ) << std::endl;
}

References LibBoard::Shape::_depth, LibBoard::Shape::_lineCap, LibBoard::Shape::_lineJoin, LibBoard::Shape::_lineStyle, LibBoard::Shape::_lineWidth, LibBoard::Shape::_penColor, LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, LibBoard::Shape::filled(), and DGtal::Color::valid().

◆ flushPostscript()

void LibBoard::Arrow::flushPostscript	(	std::ostream &	stream,
		const TransformEPS &	transform ) const

virtual

Writes the EPS code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Implements LibBoard::Shape.

Definition at line 793 of file Shapes.cpp.

{
    double dx = _x1 - _x2;
    double dy = _y1 - _y2;
    double norm = sqrt( dx*dx + dy*dy );
    dx /= norm;
    dy /= norm;
    dx *= 10*_lineWidth;
    dy *= 10*_lineWidth;
 
    //   double back_x = 0.8 * dx + _x2;
    //   double back_y = 0.8 * dy + _y2;
 
    double ndx1 = dx*cos(0.3)-dy*sin(0.3);
    double ndy1 = dx*sin(0.3)+dy*cos(0.3);
    double ndx2 = dx*cos(-0.3)-dy*sin(-0.3);
    double ndy2 = dx*sin(-0.3)+dy*cos(-0.3);
 
    stream << "\n% Arrow\n";
    stream << _penColor.postscript() << " srgb "
    << postscriptProperties() << " "
    << "n "
    << transform.mapX( _x1 ) << " "
    << transform.mapY( _y1 ) << " "
    << "m "
    << transform.mapX( _x2 + ( dx * cos(0.3) ) ) << " "
    << transform.mapY( _y2 + ( dy * cos(0.3) ) ) << " "
    << "l stroke" << std::endl;
 
    if ( filled() ) {
        stream << "n "
        << transform.mapX( _x2 ) + transform.scale( ndx1 ) << " "
        << transform.mapY( _y2 ) + transform.scale( ndy1 ) << " "
        << "m "
        << transform.mapX( _x2 ) << " "
        << transform.mapY( _y2 ) << " l "
        << transform.mapX( _x2 ) + transform.scale( ndx2 ) << " "
        << transform.mapY( _y2 ) + transform.scale( ndy2 ) << " ";
        stream  << "l cp " << _penColor.postscript() << " srgb  fill" << std::endl;
    }
 
    stream << "n "
    << transform.mapX( _x2 ) + transform.scale( ndx1 ) << " "
    << transform.mapY( _y2 ) + transform.scale( ndy1 ) << " "
    << "m "
    << transform.mapX( _x2 ) << " "
    << transform.mapY( _y2 ) << " l "
    << transform.mapX( _x2 ) + transform.scale( ndx2 ) << " "
    << transform.mapY( _y2 ) + transform.scale( ndy2 ) << " l"
    << " " << _penColor.postscript() << " srgb cp [] 0 sd stroke" << std::endl;
}

References LibBoard::Shape::_lineWidth, LibBoard::Shape::_penColor, LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, LibBoard::Shape::filled(), DGtal::Color::postscript(), and LibBoard::Shape::postscriptProperties().

◆ flushSVG()

void LibBoard::Arrow::flushSVG	(	std::ostream &	stream,
		const TransformSVG &	transform ) const

virtual

Writes the SVG code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Implements LibBoard::Shape.

Definition at line 880 of file Shapes.cpp.

{
    double dx = _x1 - _x2;
    double dy = _y1 - _y2;
    double norm = sqrt( dx*dx + dy*dy );
    dx /= norm;
    dy /= norm;
    dx *= 10 * _lineWidth;
    dy *= 10 * _lineWidth;
 
    //   double back_x = 0.8 * dx + _x2;
    //   double back_y = 0.8 * dy + _y2;
 
    double ndx1 = dx*cos(0.3)-dy*sin(0.3);
    double ndy1 = dx*sin(0.3)+dy*cos(0.3);
    double ndx2 = dx*cos(-0.3)-dy*sin(-0.3);
    double ndy2 = dx*sin(-0.3)+dy*cos(-0.3);
 
    stream << "<g>" << std::endl;
    // The line
    stream << " <path "
    << "d=\"M " << transform.mapX( _x1 ) << " " << transform.mapY( _y1 )
    << " L " << transform.mapX( _x2 + ( dx * cos(0.3) ) )
    << " " << transform.mapY( _y2 + ( dy * cos(0.3) ) ) << " z\""
    << " fill=\"none\" stroke=\"" << _penColor.svg() << "\""
    << _penColor.svgAlpha( " stroke" );
    if ( _lineStyle != SolidStyle )
        stream << " style=\"" <<   xFigDashStylesSVG[ _lineStyle ] << '"';
    stream << " stroke-width=\"" << transform.mapWidth( _lineWidth ) << "mm\" />";
 
    // The arrow
    stream << " <polygon";
    stream << " fill=\"" << _fillColor.svg() << "\"";
    stream << " stroke=\"" << _penColor.svg() << "\""
    << " stroke-width=\"" << transform.mapWidth( /* 0.33 * */ _lineWidth ) << "mm\""
    << " style=\"stroke-linecap:butt;stroke-linejoin:miter\""
    << _fillColor.svgAlpha( " fill" )
    << _penColor.svgAlpha( " stroke" )
    << " points=\""
    << transform.mapX( _x2 ) + transform.scale( ndx1 ) << ","
    << transform.mapY( _y2 ) - transform.scale( ndy1 ) << " "
    << transform.mapX( _x2 ) << ","
    << transform.mapY( _y2 ) << " "
    << transform.mapX( _x2 ) + transform.scale( ndx2 ) << ","
    << transform.mapY( _y2 ) - transform.scale( ndy2 ) << " "
    << transform.mapX( _x2 ) + transform.scale( ndx1 ) << ","
    << transform.mapY( _y2 ) - transform.scale( ndy1 ) << "\" />" << std::endl;
    stream << "</g>" << std::endl;
}

References LibBoard::Shape::_fillColor, LibBoard::Shape::_lineStyle, LibBoard::Shape::_lineWidth, LibBoard::Shape::_penColor, LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, LibBoard::Shape::SolidStyle, DGtal::Color::svg(), and DGtal::Color::svgAlpha().

◆ flushTikZ()

void LibBoard::Arrow::flushTikZ	(	std::ostream &	stream,
		const TransformTikZ &	transform ) const

virtual

Writes the TikZ code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Implements LibBoard::Shape.

Definition at line 1002 of file Shapes.cpp.

{
    //stream << "\\path[-triangle 45," << tikzProperties(transform) << "] (" // Requires \usetikzlibrary{arrows}
    stream << "\\path[-latex," << tikzProperties(transform) << "] ("
    << transform.mapX( _x1 ) << ',' << transform.mapY( _y1 )
    << ") -- ("
    << transform.mapX( _x2 ) << ',' << transform.mapY( _y2 )
    << ");" << std::endl;
}

References LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, and LibBoard::Shape::tikzProperties().

◆ name()

const std::string & LibBoard::Arrow::name ( ) const

virtual

Returns the generic name of the shape (e.g., Circle, Rectangle, etc.)

Returns: object name

Reimplemented from LibBoard::Shape.

Definition at line 733 of file Shapes.cpp.

{
    return _name;
}

References _name.

◆ rotated() [1/2]

Arrow LibBoard::Arrow::rotated ( double angle ) const

Returns a copy of the arrow, rotated around its center.

Parameters

angle The angle of rotation.

Returns: A copy of the lines, rotated around its center by the given angle.

Definition at line 748 of file Shapes.cpp.

{
    Arrow res(*this);
    Point c = center();
    Point( _x1, _y1 ).rotate( angle, c ).get( res._x1, res._y1 );
    Point( _x2, _y2 ).rotate( angle, c ).get( res._x2, res._y2 );
    return res;
}

References LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, LibBoard::Line::_y2, and LibBoard::Line::center().

◆ rotated() [2/2]

Arrow LibBoard::Arrow::rotated	(	double	angle,
		const Point &	center ) const

Returns a copy of the arrow, rotated around a given rotation center.

Parameters

angle	The rotation angle.
center	The center of rotation.

Returns: The rotated copy of the line.

Definition at line 739 of file Shapes.cpp.

{
    Arrow res(*this);
    Point( _x1, _y1 ).rotate( angle, rotCenter ).get( res._x1, res._y1 );
    Point( _x2, _y2 ).rotate( angle, rotCenter ).get( res._x2, res._y2 );
    return res;
}

References LibBoard::Line::_x1, LibBoard::Line::_x2, LibBoard::Line::_y1, and LibBoard::Line::_y2.

◆ scaled() [1/2]

Arrow LibBoard::Arrow::scaled ( double s ) const

Definition at line 782 of file Shapes.cpp.

{
    return Arrow::scaled( s, s );
}

References scaled().

◆ scaled() [2/2]

Arrow LibBoard::Arrow::scaled	(	double	sx,
		double	sy ) const

Returns a scaled copy of the arrow.

Parameters

sx	Scale factor along the x axis.
sy	Scale factor along the y axis.

Returns: A scaled copy of the arrow.

Definition at line 769 of file Shapes.cpp.

{
    Arrow res(*this);
    Point c = center();
    res._x1 *= sx;
    res._x2 *= sx;
    res._y1 *= sy;
    res._y2 *= sy;
    Point delta = c - res.center();
    return static_cast<Arrow &>( res.translate( delta.x, delta.y ) );
}

References LibBoard::Line::center(), LibBoard::Point::x, and LibBoard::Point::y.

Referenced by scaled().

◆ translated()

Arrow LibBoard::Arrow::translated	(	double	dx,
		double	dy ) const

Returns a translated copy of the arrow.

Parameters

dx	The shift along the x axis.
dy	The shift along the y axis.

Returns: A translated copy of the line.

Definition at line 758 of file Shapes.cpp.

{
    Arrow res(*this);
    res._x1 += dx;
    res._x2 += dx;
    res._y1 += dy;
    res._y2 += dy;
    return res;
}

Field Documentation

◆ _name

const std::string LibBoard::Arrow::_name

staticprivate

The generic name of the shape.

Definition at line 758 of file Board/Shapes.h.

Referenced by name().

The documentation for this struct was generated from the following files:

Public Member Functions

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Arrow()

Member Function Documentation

◆ clone()

◆ flushCairo()

◆ flushFIG()

◆ flushPostscript()

◆ flushSVG()

◆ flushTikZ()

◆ name()

◆ rotated() [1/2]

◆ rotated() [2/2]

◆ scaled() [1/2]

◆ scaled() [2/2]

◆ translated()

Field Documentation

◆ _name