QwtLinearColorMap builds a color map from color stops. 更多...

#include <qwt_colormap.h>

类 QwtLinearColorMap 继承关系图:

类
class	ColorStops

class	PrivateData

Public 类型
enum	Mode { FixedColors , ScaledColors }
	Mode of color map 更多...

Public 类型继承自 QwtColorMap
enum	Format { RGB , Indexed }
	Format for color mapping 更多...

Public 成员函数
	QwtLinearColorMap (QwtColorMap::Format=QwtColorMap::RGB)
	Build a color map with two stops at 0.0 and 1.0.

	QwtLinearColorMap (const QColor &from, const QColor &to, QwtColorMap::Format=QwtColorMap::RGB)

void	setMode (Mode)
	Set the mode of the color map.

Mode	mode () const
	Return the mode of the color map.

void	setColorInterval (const QColor &color1, const QColor &color2)
	Set the color range.

void	addColorStop (double value, const QColor &)
	Add a color stop.

QVector< double >	stopPos () const
	Return positions of color stops in increasing order.

QVector< QColor >	stopColors () const
	Return the colors of the color stops.

QColor	color1 () const
	Return the first color of the color range.

QColor	color2 () const
	Return the second color of the color range.

virtual QRgb	rgb (double vMin, double vMax, double value) const override
	Map a value of a given interval into a RGB value.

virtual uint	colorIndex (int numColors, double vMin, double vMax, double value) const override
	Map a value of a given interval into a color index.

Public 成员函数继承自 QwtColorMap
	QwtColorMap (Format=QwtColorMap::RGB)
	Constructor.

virtual	~QwtColorMap ()
	Destructor.

void	setFormat (Format)
	Set the format of the color map.

Format	format () const

QColor	color (double vMin, double vMax, double value) const

virtual QVector< QRgb >	colorTable (int numColors) const
	Build and return a color map of arbitrary number of colors.

virtual QVector< QRgb >	colorTable256 () const
	Build and return a color map of 256 colors.

详细描述

QwtLinearColorMap builds a color map from color stops.

A color stop is a color at a specific position. The valid range for the positions is [0.0, 1.0]. When mapping a value into a color it is translated into this interval according to mode().

成员枚举类型说明

◆ Mode

enum QwtLinearColorMap::Mode

Mode of color map

参见: setMode(), mode()

枚举值
FixedColors	Return the color from the next lower color stop
ScaledColors	Interpolating the colors of the adjacent stops.

构造及析构函数说明

◆ QwtLinearColorMap()

QwtLinearColorMap::QwtLinearColorMap ( QwtColorMap::Format format = QwtColorMap::RGB )

explicit

Build a color map with two stops at 0.0 and 1.0.

The color at 0.0 is Qt::blue, at 1.0 it is Qt::yellow.

参数

[in] format Preferred format of the color map.

Build a color map with two stops at 0.0 and 1.0.

参数

[in]	color1	Color used for the minimum value of the value interval.
[in]	color2	Color used for the maximum value of the value interval.
[in]	format	Preferred format for the color map.

成员函数说明

◆ addColorStop()

void QwtLinearColorMap::addColorStop	(	double	value,
		const QColor &	color
	)

Add a color stop.

The value has to be in the range [0.0, 1.0]. F.e. a stop at position 17.0 for a range [10.0,20.0] must be passed as: (17.0 - 10.0) / (20.0 - 10.0).

参数

[in]	value	Value between [0.0, 1.0].
[in]	color	Color stop.

◆ color1()

QColor QwtLinearColorMap::color1 ( ) const

Return the first color of the color range.

返回: First color of the color range.

参见: setColorInterval()

◆ color2()

QColor QwtLinearColorMap::color2 ( ) const

Return the second color of the color range.

返回: Second color of the color range.

参见: setColorInterval()

◆ colorIndex()

uint QwtLinearColorMap::colorIndex	(	int	numColors,
		double	vMin,
		double	vMax,
		double	value
	)		const

overridevirtual

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

参数

[in]	numColors	Size of the color table.
[in]	vMin	Minimum of the value interval.
[in]	vMax	Maximum of the value interval.
[in]	value	Value to map into a color index.

返回: Index, between 0 and 255.

注解: NaN or Inf values are mapped to 0.

重载 QwtColorMap .

◆ mode()

QwtLinearColorMap::Mode QwtLinearColorMap::mode ( ) const

Return the mode of the color map.

返回: Mode of the color map.

参见: setMode()

◆ rgb()

QRgb QwtLinearColorMap::rgb	(	double	vMin,
		double	vMax,
		double	value
	)		const

overridevirtual

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

参数

[in]	vMin	Minimum of the value interval.
[in]	vMax	Maximum of the value interval.
[in]	value	Value to map into a RGB value.

返回: RGB value for value.

实现了 QwtColorMap.

◆ setColorInterval()

void QwtLinearColorMap::setColorInterval	(	const QColor &	color1,
		const QColor &	color2
	)

Set the color range.

Add stops at 0.0 and 1.0.

参数

[in]	color1	Color used for the minimum value of the value interval.
[in]	color2	Color used for the maximum value of the value interval.

参见: color1(), color2()

◆ setMode()

void QwtLinearColorMap::setMode ( Mode mode )

Set the mode of the color map.

FixedColors means the color is calculated from the next lower color stop. ScaledColors means the color is calculated by interpolating the colors of the adjacent stops.

参数

[in] mode Resampling mode.

参见: mode()

◆ stopColors()

QVector< QColor > QwtLinearColorMap::stopColors ( ) const

Return the colors of the color stops.

返回: Colors of color stops.

◆ stopPos()

QVector< double > QwtLinearColorMap::stopPos ( ) const

Return positions of color stops in increasing order.

返回: Positions of color stops.

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/core/qwt_colormap.h
/home/runner/work/QWT/QWT/src/core/qwt_colormap.cpp

类

Public 类型

Public 成员函数

详细描述

成员枚举类型说明

◆ Mode

构造及析构函数说明

◆ QwtLinearColorMap()

成员函数说明

◆ addColorStop()

◆ color1()

◆ color2()

◆ colorIndex()

◆ mode()

◆ rgb()

◆ setColorInterval()

◆ setMode()

◆ stopColors()

◆ stopPos()