CDPL.Vis.CairoBackend.CairoFontMetrics Class Reference

Implements the FontMetrics interface for the Cairo rendering backend. More...

Inheritance diagram for CDPL.Vis.CairoBackend.CairoFontMetrics:

Public Member Functions
None	__init__ (cairo.Context cairo_ctxt)
	Constructs a font metrics object that operates on the Cairo drawing context specified by cairo_ctxt. More...
None	setFont (Vis.Font font)
	Specifies the font to use for the calculation of text metrics. More...
float	getAscent ()
	Returns the ascent of the current font. More...
float	getDescent ()
	Returns the descent of the current font. More...
float	getHeight ()
	Returns the height of the current font. More...
float	getLeading ()
	Returns the leading of the current font. More...
float	getWidth ()
float	getBounds (str string, Vis.Rectangle2D bounds)
Public Member Functions inherited from CDPL.Vis.FontMetrics
None	__init__ ()
	Initializes the FontMetrics instance.
int	getObjectID ()
	Returns the numeric identifier (ID) of the wrapped C++ class instance. More...
None	setFont (Font font)
	Specifies the font for which to obtain the metrics. More...
float	getWidth (str string)
None	getBounds (str string, Rectangle2D bounds)

Additional Inherited Members
Properties inherited from CDPL.Vis.FontMetrics
	objectID = property(getObjectID)

Detailed Description

Implements the FontMetrics interface for the Cairo rendering backend.

For more information about the Cairo 2D Graphics Library see [CAIRO].

Constructor & Destructor Documentation

__init__()

None CDPL.Vis.CairoBackend.CairoFontMetrics.__init__

(

cairo.Context

cairo_ctxt

)

Constructs a font metrics object that operates on the Cairo drawing context specified by cairo_ctxt.

Parameters

cairo_ctxt

The Cairo drawing context.

Exceptions

Base.NullPointerException

if cairo_ctxt is None.

Member Function Documentation

setFont()

None CDPL.Vis.CairoBackend.CairoFontMetrics.setFont

(

Vis.Font

font

)

Specifies the font to use for the calculation of text metrics.

Parameters

font	The font used for the calculation of text metrics.

getAscent()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getAscent

(

)

Returns the ascent of the current font.

Returns

The ascent of the current font.

Reimplemented from CDPL.Vis.FontMetrics.

getDescent()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getDescent

(

)

Returns the descent of the current font.

Returns

The descent of the current font.

Reimplemented from CDPL.Vis.FontMetrics.

getHeight()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getHeight

(

)

Returns the height of the current font.

Returns

The height of the current font.

Reimplemented from CDPL.Vis.FontMetrics.

getLeading()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getLeading

(

)

Returns the leading of the current font.

Returns

The leading of the current font.

Reimplemented from CDPL.Vis.FontMetrics.

getWidth()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getWidth

(

)

Returns

getBounds()

float CDPL.Vis.CairoBackend.CairoFontMetrics.getBounds	(	str	string,
		Vis.Rectangle2D	bounds
	)

Parameters

string
bounds

Returns