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QColormap ClassThe QColormap class maps device independent QColors to device dependent pixel values. More... #include <QColormap>
Public Types
Public Functions
Static Public Members
Detailed DescriptionThe QColormap class maps device independent QColors to device dependent pixel values. Member Type Documentation
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| Constant | Value | Description |
|---|---|---|
| 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. |
Member Function Documentation
QColormap::QColormap(const QColormap & colormap)
Constructs a copy of another colormap.
QColormap::~QColormap()
Destroys the colormap.
const QColor QColormap::colorAt(uint pixel) const
Returns a QColor for the pixel.
See also pixel().
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().
int QColormap::depth() const
Returns the depth of the device.
See also size().
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.
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.
Mode QColormap::mode() const
Returns the mode of this colormap.
See also QColormap::Mode.
uint QColormap::pixel(const QColor & color) const
Returns a device dependent pixel value for the color.
See also colorAt().
int QColormap::size() const
Returns the size of the colormap for Indexed and Gray modes; Returns -1 for Direct mode.
See also colormap().
QColormap & QColormap::operator=(const QColormap & colormap)
Assigns the given colormap to this color map and returns a reference to this color map.
This function was introduced in Qt 4.2.