QtGui.QGlyphRun Class Reference

The QGlyphRun class provides direct access to the internal glyphs in a font. More...

Inheritance diagram for QtGui.QGlyphRun:

Collaboration diagram for QtGui.QGlyphRun:

Public Member Functions
override bool	Equals (object o)
override int	GetHashCode ()
	QGlyphRun ()
	QGlyphRun (QGlyphRun other)
virtual void	CreateProxy ()
new void	Clear ()
new void	SetRawData (ref uint glyphIndexArray, QPointF glyphPositionArray, int size)
new void	Dispose ()

Static Public Member Functions
static bool	operator!= (QGlyphRun arg1, QGlyphRun arg2)
static bool	operator== (QGlyphRun arg1, QGlyphRun arg2)

Protected Member Functions
	QGlyphRun (System.Type dummy)

Protected Attributes
SmokeInvocation	interceptor

Properties
new System.Collections.Generic.List < System.UInt32 >	GlyphIndexes [get, set]
new bool	Overline [get, set]
new System.Collections.Generic.List < QPointF >	Positions [get, set]
new QRawFont	RawFont [get, set]
new bool	StrikeOut [get, set]
new bool	Underline [get, set]
virtual System.IntPtr	SmokeObject [get, set]

Detailed Description

The QGlyphRun class provides direct access to the internal glyphs in a font.

When Qt displays a string of text encoded in Unicode, it will first convert the Unicode points into a list of glyph indexes and a list of positions based on one or more fonts. The Unicode representation of the text and the QFont object will in this case serve as a convenient abstraction that hides the details of what actually takes place when displaying the text on-screen. For instance, by the time the text actually reaches the screen, it may be represented by a set of fonts in addition to the one specified by the user, e.g. in case the originally selected font did not support all the writing systems contained in the text.

Under certain circumstances, it can be useful as an application developer to have more low-level control over which glyphs in a specific font are drawn to the screen. This could for instance be the case in applications that use an external font engine and text shaper together with Qt. QGlyphRun provides an interface to the raw data needed to get text on the screen. It contains a list of glyph indexes, a position for each glyph and a font.

It is the user's responsibility to ensure that the selected font actually contains the provided glyph indexes.

QTextLayout::glyphRuns() or QTextFragment::glyphRuns() can be used to convert unicode encoded text into a list of QGlyphRun objects, and QPainter::drawGlyphRun() can be used to draw the glyphs.

Note: Please note that QRawFont is considered local to the thread in which it is constructed. This in turn means that a new QRawFont will have to be created and set on the QGlyphRun if it is moved to a different thread. If the QGlyphRun contains a reference to a QRawFont from a different thread than the current, it will not be possible to draw the glyphs using a QPainter, as the QRawFont is considered invalid and inaccessible in this case.

Constructor & Destructor Documentation

QtGui.QGlyphRun.QGlyphRun ( System.Type  dummy )

protected

QtGui.QGlyphRun.QGlyphRun

(

)

Constructs an empty QGlyphRun object.

QtGui.QGlyphRun.QGlyphRun

(

QGlyphRun

other

)

Constructs a QGlyphRun object which is a copy of other.

Member Function Documentation

new void QtGui.QGlyphRun.Clear

(

)

Clears all data in the QGlyphRun object.

virtual void QtGui.QGlyphRun.CreateProxy ( )

virtual

new void QtGui.QGlyphRun.Dispose

(

)

override bool QtGui.QGlyphRun.Equals

(

object

o

)

override int QtGui.QGlyphRun.GetHashCode

(

)

static bool QtGui.QGlyphRun.operator!= ( QGlyphRun  arg1, QGlyphRun  arg2  )

static

Compares other to this QGlyphRun object. Returns true if any of the list of glyph indexes, the list of positions or the font are different, otherwise returns false.

static bool QtGui.QGlyphRun.operator== ( QGlyphRun  arg1, QGlyphRun  arg2  )

static

Compares other to this QGlyphRun object. Returns true if the list of glyph indexes, the list of positions and the font are all equal, otherwise returns false.

new void QtGui.QGlyphRun.SetRawData	(	ref uint	glyphIndexArray,
		QPointF	glyphPositionArray,
		int	size
	)

Sets the glyph indexes and positions of this QGlyphRun to use the first size elements in the arrays glyphIndexArray and glyphPositionArray. The data is not copied. The caller must guarantee that the arrays are not deleted as long as this QGlyphRun and any copies of it exists.

See also setGlyphIndexes() and setPositions().

Member Data Documentation

SmokeInvocation QtGui.QGlyphRun.interceptor

protected

Property Documentation

new System.Collections.Generic.List<System.UInt32> QtGui.QGlyphRun.GlyphIndexes

getset

Returns the glyph indexes for this QGlyphRun object.

Set the glyph indexes for this QGlyphRun object to glyphIndexes. The glyph indexes must be valid for the selected font.

new bool QtGui.QGlyphRun.Overline

getset

Returns true if this QGlyphRun should be painted with an overline decoration.

Indicates that this QGlyphRun should be painted with an overline decoration if overline is true. Otherwise the QGlyphRun should be painted with no overline decoration.

new System.Collections.Generic.List<QPointF> QtGui.QGlyphRun.Positions

getset

Returns the position of the edge of the baseline for each glyph in this set of glyph indexes.

Sets the positions of the edge of the baseline for each glyph in this set of glyph indexes to positions.

new QRawFont QtGui.QGlyphRun.RawFont

getset

Returns the font selected for this QGlyphRun object.

Sets the font specified by rawFont to be the font used to look up the glyph indexes.

virtual System.IntPtr QtGui.QGlyphRun.SmokeObject

getset

new bool QtGui.QGlyphRun.StrikeOut

getset

Returns true if this QGlyphRun should be painted with a strike out decoration.

Indicates that this QGlyphRun should be painted with an strike out decoration if strikeOut is true. Otherwise the QGlyphRun should be painted with no strike out decoration.

new bool QtGui.QGlyphRun.Underline

getset

Returns true if this QGlyphRun should be painted with an underline decoration.

Indicates that this QGlyphRun should be painted with an underline decoration if underline is true. Otherwise the QGlyphRun should be painted with no underline decoration.