Public Types¶

enum Format { RGB, Indexed }

Public Member Functions¶

QwtColorMap (Format=QwtColorMap::RGB)
virtual ~QwtColorMap ()
Destructor. void setFormat (Format)
virtual QRgb rgb (const QwtInterval &interval, double value) const =0
virtual uint colorIndex (int numColors, const QwtInterval &interval, double value) const
Map a value of a given interval into a color index. QColor color (const QwtInterval &, double value) const
virtual QVector< QRgb > colorTable (int numColors) const
virtual QVector< QRgb > colorTable256 () const

Public Attributes¶

Format const

enum QwtColorMap::Format¶

Format for color mapping

See also

Enumerator

RGB

The map is intended to map into RGB values.

Indexed

Map values into 8 bit values, that are used as indexes into the color table.

Indexed color maps are used to generate QImage::Format_Indexed8 images. The calculation of the color index is usually faster and the resulting image has a lower memory footprint.

See also

Definition at line 45 of file qwt_color_map.h.

QwtColorMap::QwtColorMap (Format format = QwtColorMap::RGB) [explicit]¶

Constructor

Parameters

Definition at line 249 of file qwt_color_map.cpp.

QColor QwtColorMap::color (const QwtInterval & interval, double value) const [inline]¶

Map a value into a color

Parameters

Returns

Definition at line 248 of file qwt_color_map.h.

uint QwtColorMap::colorIndex (int numColors, const QwtInterval & interval, double value) const [virtual]¶

Map a value of a given interval into a color index.

Parameters

Returns

Reimplemented in QwtLinearColorMap.

Definition at line 278 of file qwt_color_map.cpp.

QVector< QRgb > QwtColorMap::colorTable (int numColors) const [virtual]¶

Build and return a color map of arbitrary number of colors

The color table is needed for rendering indexed images in combination with using colorIndex().

Parameters

Returns

Definition at line 325 of file qwt_color_map.cpp.

QVector< QRgb > QwtColorMap::colorTable256 () const [virtual]¶

Build and return a color map of 256 colors

The color table is needed for rendering indexed images in combination with using colorIndex().

Returns

Definition at line 304 of file qwt_color_map.cpp.

virtual QRgb QwtColorMap::rgb (const QwtInterval & interval, double value) const [pure virtual]¶

Map a value of a given interval into a RGB value.

Parameters

Returns

Implemented in QwtSaturationValueColorMap, QwtHueColorMap, QwtAlphaColorMap, and QwtLinearColorMap.

void QwtColorMap::setFormat (Format format)¶

Set the format of the color map

Parameters

Definition at line 264 of file qwt_color_map.cpp.

QwtColorMap::Format QwtColorMap::const [inline]¶

Initial value:

{


    return m_format

Returns

See also

Definition at line 67 of file qwt_color_map.h.