Referencia de la Clase QGLColormap

The QGLColormap class is used for installing custom colormaps into QGLWidgets.OpenGLQGLColormap provides a platform independent way of specifying and installing indexed colormaps into QGLWidgets. QGLColormap is especially useful when using the OpenGL color-index mode. Más...

#include <qglcolormap.h>

Lista de todos los miembros.

Clases
class	Private
Métodos públicos
	QGLColormap ()
	QGLColormap (const QGLColormap &)
	~QGLColormap ()
QGLColormap &	operator= (const QGLColormap &)
bool	isEmpty () const
int	size () const
void	detach ()
void	setEntries (int count, const QRgb *colors, int base=0)
void	setEntry (int idx, QRgb color)
void	setEntry (int idx, const QColor &color)
QRgb	entryRgb (int idx) const
QColor	entryColor (int idx) const
int	find (QRgb color) const
int	findNearest (QRgb color) const
	QGLColormap ()
	QGLColormap (const QGLColormap &)
	~QGLColormap ()
QGLColormap &	operator= (const QGLColormap &)
bool	isEmpty () const
int	size () const
void	detach ()
void	setEntries (int count, const QRgb *colors, int base=0)
void	setEntry (int idx, QRgb color)
void	setEntry (int idx, const QColor &color)
QRgb	entryRgb (int idx) const
QColor	entryColor (int idx) const
int	find (QRgb color) const
int	findNearest (QRgb color) const
Amigas
class	QGLWidget

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Descripción detallada

The QGLColormap class is used for installing custom colormaps into QGLWidgets.

OpenGL

QGLColormap provides a platform independent way of specifying and installing indexed colormaps into QGLWidgets. QGLColormap is especially useful when using the OpenGL color-index mode.

Under X11 you must use an X server that supports either a PseudoColor or DirectColor visual class. If your X server currently only provides a GrayScale, TrueColor, StaticColor or StaticGray visual, you will not be able to allocate colorcells for writing. If this is the case, try setting your X server to 8 bit mode. It should then provide you with at least a PseudoColor visual. Note that you may experience colormap flashing if your X server is running in 8 bit mode.

Under Windows the size of the colormap is always set to 256 colors. Note that under Windows you can also install colormaps in child widgets.

This class uses explicit sharing (see Shared Classes).

Example of use:

    #include <qapplication.h>
    #include <qglcolormap.h>

    int main()
    {
        QApplication a( argc, argv );

        MySuperGLWidget widget( 0 ); // A QGLWidget in color-index mode
        QGLColormap colormap;

        // This will fill the colormap with colors ranging from
        // black to white.
        for ( int i = 0; i < colormap.size(); i++ )
            colormap.setEntry( i, qRgb( i, i, i ) );

        widget.setColormap( colormap );
        widget.show();
        return a.exec();
    }

Ver también:

QGLWidget::setColormap(), QGLWidget::colormap()

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Documentación del constructor y destructor

QGLColormap::QGLColormap

(

)

Construct a QGLColormap.

QGLColormap::QGLColormap

(

const QGLColormap &

map

)

Construct a shallow copy of map.

QGLColormap::~QGLColormap

(

)

Dereferences the QGLColormap and deletes it if this was the last reference to it.

QGLColormap::QGLColormap

(

)

QGLColormap::QGLColormap

(

const QGLColormap &

)

QGLColormap::~QGLColormap

(

)

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Documentación de las funciones miembro

void QGLColormap::detach

(

)

Detaches this QGLColormap from the shared block.

void QGLColormap::detach

(

)

QColor QGLColormap::entryColor

(

int

idx

)

const

Returns the QRgb value in the colorcell with index idx.

QColor QGLColormap::entryColor

(

int

idx

)

const

QRgb QGLColormap::entryRgb

(

int

idx

)

const

Returns the QRgb value in the colorcell with index idx.

QRgb QGLColormap::entryRgb

(

int

idx

)

const

int QGLColormap::find

(

QRgb

color

)

const

int QGLColormap::find

(

QRgb

color

)

const

Returns the index of the color color. If color is not in the map, -1 is returned.

int QGLColormap::findNearest

(

QRgb

color

)

const

Returns the index of the color that is the closest match to color color.

int QGLColormap::findNearest

(

QRgb

color

)

const

bool QGLColormap::isEmpty

(

void

)

const

Returns TRUE if the colormap is empty; otherwise returns FALSE. A colormap with no color values set is considered to be empty.

bool QGLColormap::isEmpty

(

)

const

QGLColormap & QGLColormap::operator=

(

const QGLColormap &

map

)

Assign a shallow copy of map to this QGLColormap.

QGLColormap& QGLColormap::operator=

(

const QGLColormap &

)

void QGLColormap::setEntries	(	int	count,
		const QRgb *	colors,
		int	base = 0
	)

Set an array of cells in this colormap. count is the number of colors that should be set, colors is the array of colors, and base is the starting index.

void QGLColormap::setEntries	(	int	count,
		const QRgb *	colors,
		int	base = 0
	)

void QGLColormap::setEntry	(	int	idx,
		const QColor &	color
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Set the cell with index idx in the colormap to color color.

void QGLColormap::setEntry	(	int	idx,
		QRgb	color
	)

void QGLColormap::setEntry	(	int	idx,
		QRgb	color
	)

Set cell at index idx in the colormap to color color.

void QGLColormap::setEntry	(	int	idx,
		const QColor &	color
	)

int QGLColormap::size

(

)

const

int QGLColormap::size

(

)

const

Returns the number of colorcells in the colormap.

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Documentación de las funciones relacionadas y clases amigas

QGLWidget [friend]

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qt/include/qglcolormap.h
• src/qt/src/opengl/qglcolormap.h
• src/qt/src/opengl/qglcolormap.cpp