Qt:Документация 4.3.2/qcolormap
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[править] QColormap Class Reference
[модуль QtGui ]
The QColormap class maps device independent QColors to device dependent pixel values. Далее...
#include <QColormap>[править] Открытые типы
- enum Mode { Direct, Indexed, Gray }
[править] Открытые функции
- QColormap ( const QColormap & colormap )
- ~QColormap ()
- const QColor colorAt ( uint pixel ) const
- const QVector<QColor> colormap () const
- int depth () const
- Mode mode () const
- uint pixel ( const QColor & color ) const
- int size () const
- QColormap & operator= ( const QColormap & colormap )
[править] Статические открытые члены
[править] Подробное описание
The QColormap class maps device independent QColors to device dependent pixel values.
[править] Описание типов
[править] enum QColormap::Mode
This enum describes how QColormap maps device independent RGB values to device dependent pixel values.
| Константа | Значение | Описание |
|---|---|---|
| QColormap::Direct | 0 | Pixel values are derived directly from the RGB values, also known as "True Color." |
| QColormap::Indexed | 1 | Pixel values represent indexes into a vector of available colors, i.e. QColormap uses the index of the color that most closely matches an RGB value. |
| QColormap::Gray | 2 | Similar to Indexed, pixel values represent a vector of available gray tones. QColormap uses the index of the gray tone that most closely matches the computed gray tone of an RGB value. |
[править] Описание функций-членов
[править] QColormap::QColormap ( const QColormap & colormap )
Constructs a copy of another colormap.
[править] QColormap::~QColormap ()
Destroys the colormap.
[править] const QColor QColormap::colorAt ( uint pixel ) const
Returns a QColor for the pixel.
See also pixel().
[править] const QVector< QColor> QColormap::colormap () const
Returns a vector of colors which represents the devices colormap for Indexed and Gray modes. This function returns an empty vector for Direct mode.
See also size().
[править] int QColormap::depth () const
Returns the depth of the device.
See also size().
[править] HPALETTE QColormap::hPal () [static]
This function is only available on Windows.
Returns an handle to the HPALETTE used by this colormap. If no HPALETTE is being used, this function returns zero.
[править] QColormap QColormap::instance ( int screen = -1 ) [static]
Returns the colormap for the specified screen. If screen is -1, this function returns the colormap for the default screen.
[править] Mode QColormap::mode () const
Returns the mode of this colormap.
See also QColormap::Mode.
[править] uint QColormap::pixel ( const QColor & color ) const
Returns a device dependent pixel value for the color.
See also colorAt().
[править] int QColormap::size () const
Returns the size of the colormap for Indexed and Gray modes; Returns -1 for Direct mode.
See also colormap().
[править] QColormap & QColormap::operator= ( const QColormap & colormap )
Assigns the given colormap to this color map and returns a reference to this color map.
Эта функция была введена в Qt 4.2.
| Copyright © 2007 Trolltech | Trademarks | Qt 4.3.2
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