Section 3: library functions
QwtSplineCurveFitter – A curve fitter using cubic splines. Synopsis #include <qwt_curve_fitter.h> Inherits QwtCurveFitter. Public Types enum FitMode { Auto, Spline, ParametricSpline } Public Member Functions QwtSplineCurveFitter () Constructor. virtual ~QwtSplineCurveFitter () Destructor. void setFitMode (FitMode) FitMode fitMode () const void setSpline (const QwtSpline &) const QwtSpline & spline () const QwtSpline & spline () void…
QwtSpline – A class for spline interpolation. Synopsis #include <qwt_spline.h> Public Types enum SplineType { Natural, Periodic } Spline type. Public Member Functions QwtSpline () Constructor. QwtSpline (const QwtSpline &) ~QwtSpline () Destructor. QwtSpline & operator= (const QwtSpline &) void setSplineType (SplineType) SplineType splineType () const bool setPoints (const QPolygonF &points) Calculate the spline coefficients….
QwtSlider – The Slider Widget. Synopsis #include <qwt_slider.h> Inherits QwtAbstractSlider. Public Types enum ScalePosition { NoScale, LeadingScale, TrailingScale } Public Member Functions QwtSlider (QWidget *parent=NULL) QwtSlider (Qt::Orientation, QWidget *parent=NULL) virtual ~QwtSlider () Destructor. void setOrientation (Qt::Orientation) Set the orientation. Qt::Orientation orientation () const void setScalePosition (ScalePosition) Change the position of the scale. ScalePosition scalePosition ()…
QwtSimpleCompassRose – A simple rose for QwtCompass. Synopsis #include <qwt_compass_rose.h> Inherits QwtCompassRose. Public Member Functions QwtSimpleCompassRose (int numThorns=8, int numThornLevels=-1) virtual ~QwtSimpleCompassRose () Destructor. void setWidth (double w) double width () const void setNumThorns (int count) int numThorns () const void setNumThornLevels (int count) int numThornLevels () const void setShrinkFactor (double factor) double shrinkFactor ()…
QwtSetSeriesData – Interface for iterating over an array of samples. Synopsis #include <qwt_series_data.h> Inherits QwtArraySeriesData< QwtSetSample >. Public Member Functions QwtSetSeriesData (const QVector< QwtSetSample > &=QVector< QwtSetSample >()) virtual QRectF boundingRect () const Calculate the bounding rectangle. Additional Inherited Members Detailed Description Interface for iterating over an array of samples. Constructor & Destructor Documentation QwtSetSeriesData::QwtSetSeriesData…
QwtSetSample – A sample of the types (x1…xn, y) or (x, y1..yn) Synopsis #include <qwt_samples.h> Public Member Functions QwtSetSample () QwtSetSample (double, const QVector< double > &=QVector< double >()) bool operator== (const QwtSetSample &other) const Compare operator. bool operator!= (const QwtSetSample &other) const Compare operator. double added () const Public Attributes double value value QVector<…
QwtSeriesStore< T > – Class storing a QwtSeriesData object. Synopsis #include <qwt_series_store.h> Inherits QwtAbstractSeriesStore. Public Member Functions QwtSeriesStore () Constructor The store contains no series. ~QwtSeriesStore () Destructor. void setData (QwtSeriesData< T > *series) QwtSeriesData< T > * data () const QwtSeriesData< T > * data () const T sample (int index) const virtual size_t…
QwtSeriesData< T > – Abstract interface for iterating over samples. Synopsis #include <qwt_series_data.h> Inherited by QwtArraySeriesData< T >. Public Member Functions QwtSeriesData () Constructor. virtual ~QwtSeriesData () Destructor. virtual size_t size () const =0 virtual T sample (size_t i) const =0 virtual QRectF boundingRect () const =0 virtual void setRectOfInterest (const QRectF &rect) Protected Attributes…
QwtScaleWidget – A Widget which contains a scale. Synopsis #include <qwt_scale_widget.h> Inherits QWidget. Public Types enum LayoutFlag { TitleInverted = 1 } Layout flags of the title. typedef QFlags< LayoutFlag > LayoutFlags Layout flags of the title. Signals void scaleDivChanged () Signal emitted, whenever the scale division changes. Public Member Functions QwtScaleWidget (QWidget *parent=NULL) Create…
QwtScaleTransformation – Operations for linear or logarithmic (base 10) transformations. Synopsis #include <qwt_scale_map.h> Public Types enum Type { Linear, Log10, Other } Public Member Functions QwtScaleTransformation (Type type) virtual ~QwtScaleTransformation () virtual double xForm (double x, double s1, double s2, double p1, double p2) const virtual double invXForm (double x, double s1, double s2, double…
QwtScaleMap – A scale map. Synopsis #include <qwt_scale_map.h> Public Member Functions QwtScaleMap () Constructor. QwtScaleMap (const QwtScaleMap &) Copy constructor. ~QwtScaleMap () QwtScaleMap & operator= (const QwtScaleMap &) Assignment operator. void setTransformation (QwtTransform *) const QwtTransform * transformation () const Get the transformation. void setPaintInterval (double p1, double p2) Specify the borders of the paint…
QwtScaleEngine – Base class for scale engines. Synopsis #include <qwt_scale_engine.h> Inherited by QwtLinearScaleEngine, and QwtLogScaleEngine. Public Types enum Attribute { NoAttribute = 0x00, IncludeReference = 0x01, Symmetric = 0x02, Floating = 0x04, Inverted = 0x08 } typedef QFlags< Attribute > Attributes Layout attributes. Public Member Functions QwtScaleEngine (uint base=10) virtual ~QwtScaleEngine () Destructor. void setBase…
QwtScaleDraw – A class for drawing scales. Synopsis #include <qwt_scale_draw.h> Inherits QwtAbstractScaleDraw. Inherited by QwtDateScaleDraw. Public Types enum Alignment { BottomScale, TopScale, LeftScale, RightScale } Public Member Functions QwtScaleDraw () Constructor. virtual ~QwtScaleDraw () Destructor. void getBorderDistHint (const QFont &, int &start, int &end) const Determine the minimum border distance. int minLabelDist (const QFont &)…
QwtScaleDiv – A class representing a scale division. Synopsis #include <qwt_scale_div.h> Public Types enum TickType { NoTick = -1, MinorTick, MediumTick, MajorTick, NTickTypes } Scale tick types. Public Member Functions QwtScaleDiv (double lowerBound=0.0, double upperBound=0.0) QwtScaleDiv (const QwtInterval &, QList< double >[NTickTypes]) QwtScaleDiv (double lowerBound, double upperBound, QList< double >[NTickTypes]) QwtScaleDiv (double lowerBound, double upperBound,…
QwtScaleArithmetic – Arithmetic including a tolerance. Synopsis #include <qwt_scale_engine.h> Static Public Member Functions static double ceilEps (double value, double intervalSize) static double floorEps (double value, double intervalSize) static double divideEps (double interval, double steps) Divide an interval into steps. static double divideInterval (double interval, int numSteps, uint base) Detailed Description Arithmetic including a tolerance. Member…
QwtSamplingThread – A thread collecting samples at regular intervals. Synopsis #include <qwt_sampling_thread.h> Inherits QThread. Public Slots void setInterval (double interval) void stop () Public Member Functions virtual ~QwtSamplingThread () Destructor. double interval () const double elapsed () const Protected Member Functions QwtSamplingThread (QObject *parent=NULL) Constructor. virtual void run () virtual void sample (double elapsed)=0 Detailed…
QwtRoundScaleDraw – A class for drawing round scales. Synopsis #include <qwt_round_scale_draw.h> Inherits QwtAbstractScaleDraw. Inherited by QwtAnalogClockScaleDraw, and QwtCompassScaleDraw. Public Member Functions QwtRoundScaleDraw () Constructor. virtual ~QwtRoundScaleDraw () Destructor. void setRadius (double radius) double radius () const void moveCenter (double x, double y) Move the center of the scale draw, leaving the radius unchanged. void moveCenter…
QwtRichTextEngine – A text engine for Qt rich texts. Synopsis #include <qwt_text_engine.h> Inherits QwtTextEngine. Public Member Functions QwtRichTextEngine () Constructor. virtual double heightForWidth (const QFont &font, int flags, const QString &text, double width) const virtual QSizeF textSize (const QFont &font, int flags, const QString &text) const virtual void draw (QPainter *painter, const QRectF &rect, int…
QwtRasterData – QwtRasterData defines an interface to any type of raster data. Synopsis #include <qwt_raster_data.h> Inherited by QwtMatrixRasterData. Public Types enum ConrecFlag { IgnoreAllVerticesOnLevel = 0x01, IgnoreOutOfRange = 0x02 } Flags to modify the contour algorithm. typedef QMap< double, QPolygonF > ContourLines Contour lines. typedef QFlags< ConrecFlag > ConrecFlags Flags to modify the contour algorithm….
QwtPowerTransform – A transformation using pow() Synopsis #include <qwt_transform.h> Inherits QwtTransform. Public Member Functions QwtPowerTransform (double exponent) virtual ~QwtPowerTransform () Destructor. virtual double transform (double value) const virtual double invTransform (double value) const virtual QwtTransform * copy () const Detailed Description A transformation using pow() QwtPowerTransform preserves the sign of a value. F.e. a transformation…