Linux Manuals session 3

QwtScaleDraw – A class for drawing scales. Synopsis#include <qwt_scale_draw.h> Inherits QwtAbstractScaleDraw. Inherited by QwtDateScaleDraw. Public Typesenum Alignment { BottomScale, TopScale, LeftScale, RightScale } Public Member FunctionsQwtScaleDraw () Constructor. virtual ~QwtScaleDraw () Destructor. void getBorderDistHint (const QFont &, int &start, int &end) const Determine the minimum border distance. int minLabelDist (const QFont &) const int minLength…

QwtScaleDiv – A class representing a scale division. Synopsis#include <qwt_scale_div.h> Public Typesenum TickType { NoTick = -1, MinorTick, MediumTick, MajorTick, NTickTypes } Scale tick types. Public Member FunctionsQwtScaleDiv (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, const QList< double…

QwtScaleArithmetic – Arithmetic including a tolerance. Synopsis#include <qwt_scale_engine.h> Static Public Member Functionsstatic 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 DescriptionArithmetic including a tolerance. Member Function Documentationdouble QwtScaleArithmetic::ceilEps…

QwtSamplingThread – A thread collecting samples at regular intervals. Synopsis#include <qwt_sampling_thread.h> Inherits QThread. Public Slotsvoid setInterval (double interval) void stop () Public Member Functionsvirtual ~QwtSamplingThread () Destructor. double interval () const double elapsed () const Protected Member FunctionsQwtSamplingThread (QObject *parent=NULL) Constructor. virtual void run () virtual void sample (double elapsed)=0 Detailed DescriptionA thread collecting samples…

QwtRoundScaleDraw – A class for drawing round scales. Synopsis#include <qwt_round_scale_draw.h> Inherits QwtAbstractScaleDraw. Inherited by QwtAnalogClockScaleDraw, and QwtCompassScaleDraw. Public Member FunctionsQwtRoundScaleDraw () 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 (const QPointF…

QwtRichTextEngine – A text engine for Qt rich texts. Synopsis#include <qwt_text_engine.h> Inherits QwtTextEngine. Public Member FunctionsQwtRichTextEngine () 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 flags, const…

QwtRasterData – QwtRasterData defines an interface to any type of raster data. Synopsis#include <qwt_raster_data.h> Inherited by QwtMatrixRasterData. Public Typesenum 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. Public Member…

QwtPowerTransform – A transformation using pow() Synopsis#include <qwt_transform.h> Inherits QwtTransform. Public Member FunctionsQwtPowerTransform (double exponent) virtual ~QwtPowerTransform () Destructor. virtual double transform (double value) const virtual double invTransform (double value) const virtual QwtTransform * copy () const Detailed DescriptionA transformation using pow() QwtPowerTransform preserves the sign of a value. F.e. a transformation with a factor…

QwtPolygonFData – Data class containing a single QwtArray<QwtDoublePoint> object. Synopsis#include <qwt_data.h> Inherits QwtData. Public Member FunctionsQwtPolygonFData (const QPolygonF &) QwtPolygonFData & operator= (const QwtPolygonFData &) virtual QwtData * copy () const virtual size_t size () const virtual double x (size_t i) const virtual double y (size_t i) const const QPolygonF & data () const Detailed…

QwtPointSeriesData – Interface for iterating over an array of points. Synopsis#include <qwt_series_data.h> Inherits QwtArraySeriesData< QPointF >. Public Member FunctionsQwtPointSeriesData (const QVector< QPointF > &=QVector< QPointF >()) virtual QRectF boundingRect () const Calculate the bounding rectangle. Additional Inherited MembersDetailed DescriptionInterface for iterating over an array of points. Constructor & Destructor DocumentationQwtPointSeriesData::QwtPointSeriesData (const QVector< QPointF > &samples…

QwtPointPolar – A point in polar coordinates. Synopsis#include <qwt_point_polar.h> Public Member FunctionsQwtPointPolar () QwtPointPolar (double azimuth, double radius) QwtPointPolar (const QwtPointPolar &) QwtPointPolar (const QPointF &) void setPoint (const QPointF &) QPointF toPoint () const bool isValid () const Returns true if radius() >= 0.0. bool isNull () const Returns true if radius() >= 0.0….

QwtPointMapper – A helper class for translating a series of points. Synopsis#include <qwt_point_mapper.h> Public Typesenum TransformationFlag { RoundPoints = 0x01, WeedOutPoints = 0x02 } Flags affecting the transformation process. typedef QFlags < TransformationFlag > TransformationFlags" Flags affecting the transformation process. Public Member FunctionsQwtPointMapper () Constructor. ~QwtPointMapper () Destructor. void setFlags (TransformationFlags) TransformationFlags flags () const…

QwtPointArrayData – Interface for iterating over two QVector<double> objects. Synopsis#include <qwt_point_data.h> Inherits QwtSeriesData< QPointF >. Public Member FunctionsQwtPointArrayData (const QVector< double > &x, const QVector< double > &y) QwtPointArrayData (const double *x, const double *y, size_t size) virtual QRectF boundingRect () const Calculate the bounding rectangle. virtual size_t size () const virtual QPointF sample (size_t…

QwtPoint3DSeriesData – Interface for iterating over an array of 3D points. Synopsis#include <qwt_series_data.h> Inherits QwtArraySeriesData< QwtPoint3D >. Public Member FunctionsQwtPoint3DSeriesData (const QVector< QwtPoint3D > &=QVector< QwtPoint3D >()) virtual QRectF boundingRect () const Calculate the bounding rectangle. Additional Inherited MembersDetailed DescriptionInterface for iterating over an array of 3D points. Constructor & Destructor DocumentationQwtPoint3DSeriesData::QwtPoint3DSeriesData (const QVector< QwtPoint3D…

QwtPoint3D – QwtPoint3D class defines a 3D point in double coordinates. Synopsis#include <qwt_point_3d.h> Public Member FunctionsQwtPoint3D () QwtPoint3D (double x, double y, double z) Constructs a point with coordinates specified by x, y and z. QwtPoint3D (const QwtPoint3D &) QwtPoint3D (const QPointF &) bool isNull () const double x () const double y () const…

QwtPlotZoomer – QwtPlotZoomer provides stacked zooming for a plot widget. Synopsis#include <qwt_plot_zoomer.h> Inherits QwtPlotPicker. Public Slotsvoid moveBy (double x, double y) virtual void moveTo (const QPointF &) virtual void zoom (const QRectF &) Zoom in. virtual void zoom (int up) Zoom in or out. Signalsvoid zoomed (const QRectF &rect) Public Member FunctionsQwtPlotZoomer (QWidget *, bool…

QwtPlotZoneItem – A plot item, which displays a zone. Synopsis#include <qwt_plot_zoneitem.h> Inherits QwtPlotItem. Public Member FunctionsQwtPlotZoneItem () Constructor. virtual ~QwtPlotZoneItem () Destructor. virtual int rtti () const void setOrientation (Qt::Orientation) Set the orientation of the zone. Qt::Orientation orientation () void setInterval (double min, double max) void setInterval (const QwtInterval &) QwtInterval interval () const void…

QwtPlotTradingCurve – QwtPlotTradingCurve illustrates movements in the price of a financial instrument over time. Synopsis#include <qwt_plot_tradingcurve.h> Inherits QwtPlotSeriesItem, and QwtSeriesStore< QwtOHLCSample >. Public Typesenum SymbolStyle { NoSymbol = -1, Bar, CandleStick, UserSymbol = 100 } Symbol styles. enum Direction { Increasing, Decreasing } Direction of a price movement. enum PaintAttribute { ClipSymbols = 0x01 }…

QwtPlotTextLabel – A plot item, which displays a text label. Synopsis#include <qwt_plot_textlabel.h> Inherits QwtPlotItem. Public Member FunctionsQwtPlotTextLabel () Constructor. virtual ~QwtPlotTextLabel () Destructor. virtual int rtti () const void setText (const QwtText &) QwtText text () const void setMargin (int margin) int margin () const virtual QRectF textRect (const QRectF &, const QSizeF &) const…

QwtPlotSvgItem – A plot item, which displays data in Scalable Vector Graphics (SVG) format. Synopsis#include <qwt_plot_svgitem.h> Inherits QwtPlotItem. Public Member FunctionsQwtPlotSvgItem (const QString &title=QString::null) Constructor. QwtPlotSvgItem (const QwtText &title) Constructor. virtual ~QwtPlotSvgItem () Destructor. bool loadFile (const QRectF &, const QString &fileName) bool loadData (const QRectF &, const QByteArray &) virtual QRectF boundingRect () const…