LibBoard::TransformCairo Struct Reference

Structure representing a scaling and translation suitable for an Cairo output. More...

#include <Board/Transforms.h>

Inheritance diagram for LibBoard::TransformCairo:

Public Member Functions
double	rounded (double x) const
double	mapY (double y) const
double	mapWidth (double width) const
void	setBoundingBox (const Rect &rect, const double pageWidth, const double pageHeight, const double margin)
Public Member Functions inherited from LibBoard::Transform
	Transform ()
virtual	~Transform ()
virtual double	mapX (double x) const
virtual void	apply (double &x, double &y) const
virtual double	scale (double x) const

Additional Inherited Members
Static Public Member Functions inherited from LibBoard::Transform
static double	round (const double &x)
Protected Attributes inherited from LibBoard::Transform
double	_scale
double	_deltaX
double	_deltaY
double	_height

Detailed Description

Structure representing a scaling and translation suitable for an Cairo output.

The TransformCairo structure.

Definition at line 112 of file Transforms.h.

Member Function Documentation

mapWidth()

double LibBoard::TransformCairo::mapWidth

(

double

width

)

const

Definition at line 240 of file Transforms.cpp.

{
  // return Transform::round( 1000 * width / ppmm ) / 1000.0;
  return Transform::round( 1000 * width  / ppmm  ) / 1000.0;
}

References LibBoard::Transform::round().

mapY()

double LibBoard::TransformCairo::mapY ( double y ) const

virtual

Implements LibBoard::Transform.

Definition at line 234 of file Transforms.cpp.

{
  return rounded( _height - ( y * _scale + _deltaY ) );
}

References LibBoard::Transform::_deltaY, LibBoard::Transform::_height, LibBoard::Transform::_scale, and rounded().

rounded()

double LibBoard::TransformCairo::rounded ( double x ) const

virtual

Reimplemented from LibBoard::Transform.

Definition at line 228 of file Transforms.cpp.

{
  return Transform::round( 100*x ) / 100.0f;
} 

References LibBoard::Transform::round().

Referenced by mapY().

setBoundingBox()

void LibBoard::TransformCairo::setBoundingBox ( const Rect & rect, const double pageWidth, const double pageHeight, const double margin )

virtual

Implements LibBoard::Transform.

Definition at line 247 of file Transforms.cpp.

{
  if ( pageWidth <= 0 || pageHeight <= 0 ) {
    _scale = 1.0f;
    // _deltaX = 0.5 * 210 * ppmm - ( rect.left + 0.5 * rect.width );
    _deltaX = - rect.left;
    // _deltaY = 0.5 * 297 * ppmm - ( rect.top - 0.5 * rect.height );
    _deltaY = - ( rect.top - rect.height );
    // _height = 297 * fig_ppmm;
    _height = rect.height;
  } else {
    const double w = pageWidth - 2 * margin;
    const double h = pageHeight - 2 * margin;
    if ( rect.height / rect.width > ( h / w ) ) {
      _scale = h * ppmm / rect.height;
    } else {
      _scale = w * ppmm / rect.width;
    }
    _deltaX = 0.5 * pageWidth * ppmm - _scale * ( rect.left + 0.5 * rect.width );
    _deltaY = 0.5 * pageHeight * ppmm - _scale * ( rect.top - 0.5 * rect.height );
    _height = pageHeight * ppmm;
  }
}

References LibBoard::Transform::_deltaX, LibBoard::Transform::_deltaY, LibBoard::Transform::_height, LibBoard::Transform::_scale, LibBoard::Rect::height, LibBoard::Rect::left, LibBoard::Rect::top, and LibBoard::Rect::width.

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

• Transforms.h
• Transforms.cpp