QwtLinearColorMap(3) Qwt User's Guide QwtLinearColorMap(3)NAMEQwtLinearColorMap-
SYNOPSIS
#include <qwt_color_map.h>
Inherits QwtColorMap.
Public Types
enum Mode { FixedColors, ScaledColors }
Public Member Functions
QwtLinearColorMap (QwtColorMap::Format=QwtColorMap::RGB)
QwtLinearColorMap (const QColor &from, const QColor &to,
QwtColorMap::Format=QwtColorMap::RGB)
QwtLinearColorMap (const QwtLinearColorMap &)
virtual ~QwtLinearColorMap ()
void addColorStop (double value, const QColor &)
QColor color1 () const
QColor color2 () const
virtual unsigned char colorIndex (const QwtDoubleInterval &, double
value) const
QwtArray< double > colorStops () const
virtual QwtColorMap * copy () const
Mode mode () const
QwtLinearColorMap & operator= (const QwtLinearColorMap &)
virtual QRgb rgb (const QwtDoubleInterval &, double value) const
void setColorInterval (const QColor &color1, const QColor &color2)
void setMode (Mode)
Detailed DescriptionQwtLinearColorMap 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. If mode() == FixedColors the color is
calculated from the next lower color stop. If mode() == ScaledColors
the color is calculated by interpolating the colors of the adjacent
stops.
Member Enumeration Documentation
enum QwtLinearColorMap::Mode
Mode of color map
See also:
setMode(), mode()Constructor & Destructor Documentation
QwtLinearColorMap::QwtLinearColorMap (QwtColorMap::Formatformat =
QwtColorMap::RGB)
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
QwtLinearColorMap::QwtLinearColorMap (const QColor &color1, const QColor
&color2, QwtColorMap::Formatformat = 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 of the coor map
Member Function Documentation
void QwtLinearColorMap::addColorStop (doublevalue, 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
QColor QwtLinearColorMap::color1 () const
Returns:
the first color of the color range
See also:
setColorInterval()
QColor QwtLinearColorMap::color2 () const
Returns:
the second color of the color range
See also:
setColorInterval()
unsigned char QwtLinearColorMap::colorIndex (const QwtDoubleInterval
&interval, doublevalue) const [virtual]
Map a value of a given interval into a color index, between 0 and 255
Parameters:
interval Range for all values
value Value to map into a color index
Implements QwtColorMap.
QwtArray< double > QwtLinearColorMap::colorStops () const
Return all positions of color stops in increasing order
QwtLinearColorMap::Mode QwtLinearColorMap::mode () const
Returns:
Mode of the color map
See also:
setMode()
QRgb QwtLinearColorMap::rgb (const QwtDoubleInterval &interval,
doublevalue) const [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
Implements QwtColorMap.
void QwtLinearColorMap::setColorInterval (const QColor &color1, const
QColor &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()
void QwtLinearColorMap::setMode (Modemode)
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()Author
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Version 5.2.3 Tue Nov 20 2012 QwtLinearColorMap(3)
