QwtLinearColorMap - QwtLinearColorMap builds a color map from color stops.
NAME SYNOPSIS Public Types Public Member Functions Additional Inherited Members Detailed Description Member Enumeration Documentation enum QwtLinearColorMap::Mode Constructor & Destructor Documentation QwtLinearColorMap::QwtLinearColorMap (QwtColorMap::Format format =QwtColorMap::RGB) [explicit] QwtLinearColorMap::QwtLinearColorMap (const QColor & color1, const QColor &color2, QwtColorMap::Format format = QwtColorMap::RGB) QwtLinearColorMap::˜QwtLinearColorMap () [virtual] Member Function Documentation void QwtLinearColorMap::addColorStop (double value, const QColor & color) QColor QwtLinearColorMap::color1 () const QColor QwtLinearColorMap::color2 () const uint QwtLinearColorMap::colorIndex (int numColors, const QwtInterval &interval, double value) const [override], [virtual] QVector< double > QwtLinearColorMap::colorStops () const QwtLinearColorMap::Mode QwtLinearColorMap::mode () const QRgb QwtLinearColorMap::rgb (const QwtInterval & interval, double value)const [override], [virtual] void QwtLinearColorMap::setColorInterval (const QColor & color1, constQColor & color2) void QwtLinearColorMap::setMode (Mode mode) AuthorNAME
QwtLinearColorMap − QwtLinearColorMap builds a color map from color stops.
SYNOPSIS
#include <qwt_color_map.h>
Inherits QwtColorMap.
Public Types
enum Mode { FixedColors, ScaledColors }
Public Types inherited from QwtColorMap
enum Format { RGB, Indexed }
Public Member Functions
QwtLinearColorMap
(QwtColorMap::Format=QwtColorMap::RGB)
QwtLinearColorMap (const QColor &from,
const QColor &to,
QwtColorMap::Format=QwtColorMap::RGB)
virtual ˜QwtLinearColorMap ()
Destructor.
void setMode (Mode)
Set the mode of the color map.
Mode mode () const
void setColorInterval (const QColor
&color1, const QColor &color2)
void addColorStop (double value, const QColor
&)
QVector< double > colorStops ()
const
QColor color1 () const
QColor color2 () const
virtual QRgb rgb (const QwtInterval &,
double value) const override
virtual uint colorIndex (int numColors, const
QwtInterval &, double value) const override
Map a value of a given interval into a color index.
Public Member Functions inherited from QwtColorMap
QwtColorMap
(Format=QwtColorMap::RGB)
virtual ˜QwtColorMap ()
Destructor.
void setFormat (Format)
QColor color (const QwtInterval &, double
value) const
virtual QVector< QRgb > colorTable (int
numColors) const
virtual QVector< QRgb > colorTable256 ()
const
Additional Inherited Members
Public Attributes inherited from QwtColorMap
Format const
Detailed Description
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().
Definition at line 98 of file qwt_color_map.h.
Member Enumeration Documentation
enum QwtLinearColorMap::Mode
Mode of color map
See also
setMode(), mode()
Enumerator
FixedColors
Return the color from the next lower color stop.
ScaledColors
Interpolating the colors of the adjacent stops.
Definition at line 105 of file qwt_color_map.h.
Constructor & Destructor Documentation
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.
Parameters
format Preferred format of the color map
Definition at line 351 of file qwt_color_map.cpp.
QwtLinearColorMap::QwtLinearColorMap (const QColor & color1, const QColor &color2, QwtColorMap::Format format = QwtColorMap::RGB)
Build a color map with two stops at 0.0 and 1.0.
Parameters
color1 Color used for
the minimum value of the value interval
color2 Color used for the maximum value of the value
interval
format Preferred format for the color map
Definition at line 367 of file qwt_color_map.cpp.
QwtLinearColorMap::˜QwtLinearColorMap () [virtual]
Destructor.
Definition at line 377 of file qwt_color_map.cpp.
Member Function Documentation
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)
Parameters
value Value between
[0.0, 1.0]
color Color stop
Definition at line 433 of file qwt_color_map.cpp.
QColor QwtLinearColorMap::color1 () const
Returns
the first color of the color range
See also
setColorInterval()
Definition at line 451 of file qwt_color_map.cpp.
QColor QwtLinearColorMap::color2 () const
Returns
the second color of the color range
See also
setColorInterval()
Definition at line 460 of file qwt_color_map.cpp.
uint QwtLinearColorMap::colorIndex (int numColors, const QwtInterval &interval, double value) const [override], [virtual]
Map a value of a given interval into a color index.
Parameters
numColors Size of the
color table
interval Range for all values
value Value to map into a color index
Returns
Index, between 0 and 255
Note
NaN values are mapped to 0
Reimplemented from QwtColorMap.
Definition at line 494 of file qwt_color_map.cpp.
QVector< double > QwtLinearColorMap::colorStops () const
Returns
Positions of color stops in increasing order
Definition at line 442 of file qwt_color_map.cpp.
QwtLinearColorMap::Mode QwtLinearColorMap::mode () const
Returns
Mode of the color map
See also
setMode()
Definition at line 400 of file qwt_color_map.cpp.
QRgb QwtLinearColorMap::rgb (const QwtInterval & interval, double value)const [override], [virtual]
Map a value of a given interval into a RGB value
Parameters
interval Range for all
values
value Value to map into a RGB value
Returns
RGB value for value
Implements QwtColorMap.
Definition at line 473 of file qwt_color_map.cpp.
void QwtLinearColorMap::setColorInterval (const QColor & color1, constQColor & color2)
Set the color range
Add stops at 0.0 and 1.0.
Parameters
color1 Color used for
the minimum value of the value interval
color2 Color used for the maximum value of the value
interval
See also
color1(), color2()
Definition at line 415 of file qwt_color_map.cpp.
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.
See also
mode()
Definition at line 391 of file qwt_color_map.cpp.
Author
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