QwtAlphaColorMap Class Reference
QwtAlphaColorMap variies the alpha value of a color.
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#include <qwt_color_map.h>
List of all members.
Detailed Description
QwtAlphaColorMap variies the alpha value of a color.
Constructor & Destructor Documentation
QwtAlphaColorMap::QwtAlphaColorMap |
( |
const QColor & |
color = QColor(Qt::gray) |
) |
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Copy constructor
- Parameters:
-
QwtAlphaColorMap::~QwtAlphaColorMap |
( |
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) |
[virtual] |
Member Function Documentation
QColor QwtAlphaColorMap::color |
( |
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) |
const |
QwtColorMap * QwtAlphaColorMap::copy |
( |
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) |
const [virtual] |
Assignment operator
- Parameters:
-
- Returns:
- *this
QRgb QwtAlphaColorMap::rgb |
( |
const QwtDoubleInterval & |
interval, |
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double |
value | |
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) |
| | const [virtual] |
Map a value of a given interval into a alpha value.
alpha := (value - interval.minValue()) / interval.width();
- Parameters:
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| interval | Range for all values |
| value | Value to map into a rgb value |
- Returns:
- rgb value, with an alpha value
Implements QwtColorMap.
void QwtAlphaColorMap::setColor |
( |
const QColor & |
color |
) |
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Set the color
- Parameters:
-
- See also:
- color()