qwtscalemap(3)
NAME
QwtScaleMap
SYNOPSIS
Detailed Description
A scale map.
QwtScaleMap offers transformations from a scale into a paint interval
and vice versa.
- Definition at line 55 of file qwt_scale_map.h.
- Public Member Functions
- QwtScaleMap ()
QwtScaleMap (const QwtScaleMap &) ~QwtScaleMap ()
QwtScaleMap & operator= (const QwtScaleMap &) void setTransformation (QwtScaleTransformation *) const QwtScaleTransformation * transformation () const void setPaintInterval (int p1, int p2) void setPaintXInterval (double p1, double p2) void setScaleInterval (double s1, double s2) int transform (double x) const
double invTransform (double i) const
double xTransform (double x) const
double p1 () const
double p2 () const
double s1 () const
double s2 () const
double pDist () const
double sDist () const - Public Attributes
- QT_STATIC_CONST double LogMin
QT_STATIC_CONST double LogMax
Constructor & Destructor Documentation
- QwtScaleMap::QwtScaleMap ()
- Constructor.
- The scale and paint device intervals are both set to [0,1].
- Definition at line 84 of file qwt_scale_map.cpp.
- QwtScaleMap::~QwtScaleMap ()
- Destructor
- Definition at line 108 of file qwt_scale_map.cpp.
Member Function Documentation
- void QwtScaleMap::setTransformation (QwtScaleTransformation *
- transformation)
Initialize the map with a transformation - Definition at line 130 of file qwt_scale_map.cpp.
- References setScaleInterval(), and transformation().
- Referenced by QwtPlot::canvasMap().
- const QwtScaleTransformation * QwtScaleMap::transformation () const
- Get the transformation.
- Definition at line 142 of file qwt_scale_map.cpp.
- Referenced by QwtPlotScaleItem::draw(), QwtScaleWidget::setScaleDiv(), and setTransformation().
- void QwtScaleMap::setPaintInterval (int p1, int p2)
- Specify the borders of the paint device interval.
- Parameters:
p1 first border
p2 second border - Definition at line 180 of file qwt_scale_map.cpp.
- References QwtScaleTransformation::type().
- Referenced by QwtPlot::canvasMap(), QwtPlotRasterItem::draw(),
QwtPainter::drawColorBar(), QwtRoundScaleDraw::QwtRoundScaleDraw(),
QwtPlotSpectrogram::renderImage(), QwtRoundScaleDraw::setAngleRange(), and QwtPlotSvgItem::viewBox(). - void QwtScaleMap::setPaintXInterval (double p1, double p2)
- Specify the borders of the paint device interval.
- Parameters:
p1 first border
p2 second border - Definition at line 194 of file qwt_scale_map.cpp.
- References QwtScaleTransformation::type().
- Referenced by QwtPlot::print().
- void QwtScaleMap::setScaleInterval (double s1, double s2)
- Specify the borders of the scale interval.
- Parameters:
s1 first border
s2 second border - Warning:
logarithmic scales might be aligned to [LogMin, LogMax]
- Definition at line 153 of file qwt_scale_map.cpp.
- References LogMax, LogMin, and QwtScaleTransformation::type().
- Referenced by QwtPlot::canvasMap(), QwtPlot::print(),
QwtPlotSpectrogram::renderImage(), setTransformation(), and
QwtPlotSvgItem::viewBox(). - int QwtScaleMap::transform (double s) const [inline]
- Transform a point related to the scale interval into an point related
to the interval of the paint device and round it to an integer. (In Qt <= 3.x paint devices are integer based. ) - See also:
QwtScaleMap::xTransform
- Definition at line 175 of file qwt_scale_map.h.
- References xTransform().
- Referenced by QwtPlotCurve::closePolyline(), QwtPlotScaleItem::draw(),
QwtPlotMarker::draw(), QwtPlotSpectrogram::drawContourLines(),
QwtPlotCurve::drawDots(), QwtRoundScaleDraw::drawLabel(),
QwtPlotCurve::drawLines(), QwtPlotCurve::drawSteps(),
QwtPlotCurve::drawSticks(), QwtPlotCurve::drawSymbols(),
QwtRoundScaleDraw::drawTick(), QwtRoundScaleDraw::extent(),
QwtScaleDraw::labelPosition(), QwtPlotPanner::moveCanvas(),
QwtPlotPicker::transform(), and QwtPlotItem::transform(). - double QwtScaleMap::invTransform (double i) const [inline]
- Transform an paint device value into a value in the interval of the
scale. - Definition at line 163 of file qwt_scale_map.h.
- References QwtScaleTransformation::invXForm().
- Referenced by QwtPainter::drawColorBar(),
QwtPlotPicker::invTransform(), QwtPlotItem::invTransform(), and
QwtPlotSpectrogram::renderImage(). - double QwtScaleMap::xTransform (double s) const [inline]
- Transform a point related to the scale interval into an point related
to the interval of the paint device - Definition at line 146 of file qwt_scale_map.h.
- References QwtScaleTransformation::type(), and
QwtScaleTransformation::xForm(). - Referenced by QwtPlotCurve::closestPoint(), QwtPlotCurve::drawLines(), transform(), and QwtPlotSvgItem::viewBox().
- double QwtScaleMap::p1 () const [inline]
- Returns:
First border of the paint interval
- Definition at line 119 of file qwt_scale_map.h.
- Referenced by QwtPlotItem::paintRect(), and
QwtPlotSpectrogram::renderImage(). - double QwtScaleMap::p2 () const [inline]
- Returns:
Second border of the paint interval
- Definition at line 127 of file qwt_scale_map.h.
- Referenced by QwtPlotSpectrogram::renderImage().
- double QwtScaleMap::s1 () const [inline]
- Returns:
First border of the scale interval
- Definition at line 103 of file qwt_scale_map.h.
- Referenced by QwtPlotSpectrogram::renderImage(), and
QwtPlotItem::scaleRect(). - double QwtScaleMap::s2 () const [inline]
- Returns:
Second border of the scale interval
- Definition at line 111 of file qwt_scale_map.h.
- Referenced by QwtPlotSpectrogram::renderImage().
Author
- Generated automatically by Doxygen for Qwt User's Guide from the source
code.