CGraphFont Class Reference

#include <GraphFont.h>

Detailed Description

Graph font drawing class.

Maintains the fonts and handles drawing strings onto FXDC surfaces.

Definition at line 51 of file GraphFont.h.


Public Member Functions
	CGraphFont ()
	Constructor.
	~CGraphFont ()
	Destructor.
void	buildFont (FXApp *a, bool hqaa, float nummultiplier)
	Initialises the FXDC fonts and measures the metrics.
int	getPrecision (double d)
	Calculates the number of digits after the decimal point.
int	getStringDimensions (FXString txt)
	Calculates the string length in pixels.
FXColor *	drawAAString (FXString txt, int &length)
	Draws an antialiased string.
float *	drawAAStringf (FXString txt, int &length)
	Draw a antialiased string then convert the result to a float array.
int	getStringDimensions (double d, int precision=0)
	Calculates string length of a number with specified precision in pixels and rounds close-to-zero numbers to zero.
FXColor *	drawAAString (double d, int &length, int precision=0)
	Draws the number as an antialiased string with specified precision and rounds close-to-zero numbers to zero.
float *	drawAAStringf (double d, int &length, int precision=0)
	Draws the number as an antialiased string with specified precision and rounds close-to-zero numbers to zero then converts to a float array.
void	initCairoMeasurements (cairo_t *c)
	Measure font metrics for the Cairo canvas.
float	getStringDimensions (cairo_t *c, FXString txt)
	Calculates the string length in units.
float	getStringDimensions (cairo_t *c, double d, int precision=0)
	Calculates string length of a number with specified precision in units and rounds close-to-zero numbers to zero.
void	drawString (cairo_t *c, float x, float y, FXString txt)
	Draws an antialiased string to the Cairo surface.
void	drawString (cairo_t *c, float x, float y, double d, int precision=0)
	Draws the number as an antialiased string to the Cairo surface with specified precision and rounds close-to-zero numbers to zero.
Public Attributes
FXFontDesc	textFontdesc
FXFontDesc	symFontdesc
int	fontheight
int	numfontheight
float	cairofontheight
float	cairobaselineheight
float	caironumfontheight
Private Member Functions
FXString	doubleToString (double d)
	Convert double to string.
FXString	preciseString (double d, int precision)
	Pads a string so it has the specified number of digits after the decimal.
Private Attributes
FXFont *	textFont
	Text font.
FXFont *	symFont
	Symbol font.
FXFont *	textSFont
	Text sup/sub font.
FXFont *	symSFont
	Symbol sup/sub font.
FXFont *	numFont
	Number font (slightly different size).
int	fontbaseline
int	fontSupbaseline
int	fontSubbaseline
int	numfontbaseline
float	fontkernel [3][3]
	Gaussian AA kernel.
bool	aamethod
	Antialiasing method: true == HQ, false == LQ.
float	numfactor
	Number font enlargement factor.
float	cairofontraise
float	cairofontlower
FXApp *	app
	Application object pointer.

Constructor & Destructor Documentation

CGraphFont::CGraphFont ( )

Constructor.

Creates the low quality antialiasing kernel.

Definition at line 1124 of file GraphFont.cpp.

References fontkernel, numFont, symFont, symSFont, textFont, and textSFont.

CGraphFont::~CGraphFont ( )

Destructor.

Deletes the font objects.

Definition at line 1156 of file GraphFont.cpp.

References numFont, symFont, symSFont, textFont, and textSFont.

Member Function Documentation

FXString CGraphFont::doubleToString ( double d ) [private]

Convert double to string.

Also returns 0 if abs(d) < ZEROERR.

Parameters:

Value to convert.

Returns:: Converted string.

Definition at line 49 of file GraphFont.cpp.

References ZEROERR.

Referenced by getPrecision(), and preciseString().

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FXString CGraphFont::preciseString	(	double	d,
		int	precision
	)			`[private]`

Pads a string so it has the specified number of digits after the decimal.

Remarks:: Should also work for numbers in mantissa exponent format.

Parameters:

	d	Value to convert.
	precision	Number of digits after the decimal

Returns:: String representing the number at the required accuracy.

Definition at line 75 of file GraphFont.cpp.

References doubleToString(), and getPrecision().

Referenced by drawAAString(), drawString(), and getStringDimensions().

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void CGraphFont::buildFont	(	FXApp *	a,
		bool	hqaa,
		float	nummultiplier
	)

Initialises the FXDC fonts and measures the metrics.

Parameters:

	a	The application object.
	hqaa	High quality antialiasing setting, see CGraphFont::aamethod.
	nummultiplier	Number font size ratio.

Definition at line 1053 of file GraphFont.cpp.

References aamethod, app, fontbaseline, fontheight, fontSubbaseline, fontSupbaseline, numfactor, numFont, numfontbaseline, numfontheight, symFont, symFontdesc, symSFont, textFont, textFontdesc, and textSFont.

Referenced by GreyLabWindow::cmdBuildFont(), GreyLabWindow::cmdGSHiresSave(), GreyLabWindow::cmdLSHiresSave(), GreyLabWindow::cmdSelectNumberFont(), GreyLabWindow::cmdSelectSymbolFont(), GreyLabWindow::cmdSelectTextFont(), and GreyLabWindow::readSettings().

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int CGraphFont::getPrecision ( double d )

Calculates the number of digits after the decimal point.

Parameters:

Value to analyse.

Returns:: Number of digits after the decimal point.

Definition at line 62 of file GraphFont.cpp.

References doubleToString().

Referenced by GreyLabWindow::cmdGSRedraw(), GreyLabWindow::cmdGSVectorRedraw(), GreyLabWindow::cmdLSRedraw(), GreyLabWindow::cmdLSVectorRedraw(), and preciseString().

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int CGraphFont::getStringDimensions ( FXString txt )

Calculates the string length in pixels.

Parameters:

txt

String to measure.

Returns:: Width in pixels.

Definition at line 122 of file GraphFont.cpp.

References aamethod, symFont, symSFont, textFont, and textSFont.

Referenced by GreyLabWindow::cmdGSRedraw(), GreyLabWindow::cmdGSVectorRedraw(), GreyLabWindow::cmdLSRedraw(), GreyLabWindow::cmdLSVectorRedraw(), getStringDimensions(), HeightWinDialog::onGLRefresh(), and GreyLabWindow::renderString().

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FXColor * CGraphFont::drawAAString	(	FXString	txt,
		int &	length
	)

Draws an antialiased string.

Parameters:

	txt	Text to render.
`[out]`	length	Length of resulting string.

Returns:: Array of FXColor values containing the drawing with width length and height CGraphFont::numfontheight.

Definition at line 318 of file GraphFont.cpp.

References aamethod, app, fontbaseline, fontheight, fontkernel, fontSubbaseline, fontSupbaseline, symFont, symSFont, textFont, and textSFont.

Referenced by GreyLabWindow::cmdGSRedraw(), GreyLabWindow::cmdLSRedraw(), drawAAStringf(), and GreyLabWindow::renderString().

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float * CGraphFont::drawAAStringf	(	FXString	txt,
		int &	length
	)

Draw a antialiased string then convert the result to a float array.

Remarks:: See CGraphFont::drawAAString.

Returns:: Array of float values containing the drawing with width length and height CGraphFont::numfontheight.

Definition at line 631 of file GraphFont.cpp.

References drawAAString(), and fontheight.

Referenced by HeightWinDialog::onGLRefresh().

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int CGraphFont::getStringDimensions	(	double	d,
		int	precision = `0`
	)

Calculates string length of a number with specified precision in pixels and rounds close-to-zero numbers to zero.

Remarks:: Should also work for numbers in mantissa exponent format.

Parameters:

	d	Value to measure.
	precision	Number of digits after the decimal

Returns:: Width in pixels.

Definition at line 105 of file GraphFont.cpp.

References aamethod, numFont, and preciseString().

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FXColor * CGraphFont::drawAAString	(	double	d,
		int &	length,
		int	precision = `0`
	)

Draws the number as an antialiased string with specified precision and rounds close-to-zero numbers to zero.

Parameters:

	d	Number to render.
`[out]`	length	Length of resulting string.
	precision	Required number precision.

Returns:: Array of FXColor values containing the drawing with width length and height CGraphFont::numfontheight.

Definition at line 216 of file GraphFont.cpp.

References aamethod, app, fontkernel, numFont, numfontbaseline, numfontheight, and preciseString().

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float * CGraphFont::drawAAStringf	(	double	d,
		int &	length,
		int	precision = `0`
	)

Draws the number as an antialiased string with specified precision and rounds close-to-zero numbers to zero then converts to a float array.

Remarks:: See CGraphFont::drawAAString.

Returns:: Array of float values containing the drawing with width length and height CGraphFont::numfontheight.

Definition at line 608 of file GraphFont.cpp.

References drawAAString(), and numfontheight.

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void CGraphFont::initCairoMeasurements ( cairo_t * c )

Measure font metrics for the Cairo canvas.

Parameters:

The Cairo canvas object.

Remarks:: Fills in internal class values.

Definition at line 1006 of file GraphFont.cpp.

References cairobaselineheight, cairofontheight, cairofontlower, cairofontraise, caironumfontheight, numfactor, symFontdesc, and textFontdesc.

Referenced by GreyLabWindow::cmdGSVectorRedraw(), and GreyLabWindow::cmdLSVectorRedraw().

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float CGraphFont::getStringDimensions	(	cairo_t *	c,
		FXString	txt
	)

Calculates the string length in units.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

	c	The Cairo canvas object.
	txt	String to measure.

Returns:: Width in units.

Definition at line 673 of file GraphFont.cpp.

References symFontdesc, and textFontdesc.

float CGraphFont::getStringDimensions	(	cairo_t *	c,
		double	d,
		int	precision = `0`
	)

Calculates string length of a number with specified precision in units and rounds close-to-zero numbers to zero.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

	c	The Cairo canvas object.
	d	Value to measure.
	precision	Number of digits after the decimal

Returns:: Width in units.

Definition at line 660 of file GraphFont.cpp.

References getStringDimensions(), and preciseString().

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void CGraphFont::drawString	(	cairo_t *	c,
		float	x,
		float	y,
		FXString	txt
	)

Draws an antialiased string to the Cairo surface.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

	c	The Cairo canvas object.
	x	X position on the canvas.
	y	Y position on the canvas.
	txt	Text to render.

Definition at line 844 of file GraphFont.cpp.

References cairofontlower, cairofontraise, symFontdesc, and textFontdesc.

Referenced by GreyLabWindow::cmdGSVectorRedraw(), GreyLabWindow::cmdLSVectorRedraw(), and GreyLabWindow::renderString().

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void CGraphFont::drawString	(	cairo_t *	c,
		float	x,
		float	y,
		double	d,
		int	precision = `0`
	)

Draws the number as an antialiased string to the Cairo surface with specified precision and rounds close-to-zero numbers to zero.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

	c	The Cairo canvas object.
	x	X position on the canvas.
	y	Y position on the canvas.
	d	Number to render.
	precision	Required number precision.

Definition at line 822 of file GraphFont.cpp.

References numfactor, preciseString(), and textFontdesc.

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

Generated on Mon Mar 10 13:55:45 2008 for GreyLab by

1.5.3

CGraphFont Class Reference

Detailed Description

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Constructor & Destructor Documentation

Member Function Documentation