Section 3: library functions
QwtPolygonFData – Data class containing a single QwtArray<QwtDoublePoint> object. Synopsis #include <qwt_data.h> Inherits QwtData. Public Member Functions QwtPolygonFData (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 ()…
QwtPointSeriesData – Interface for iterating over an array of points. Synopsis #include <qwt_series_data.h> Inherits QwtArraySeriesData< QPointF >. Public Member Functions QwtPointSeriesData (const QVector< QPointF > &=QVector< QPointF >()) virtual QRectF boundingRect () const Calculate the bounding rectangle. Additional Inherited Members Detailed Description Interface for iterating over an array of points. Constructor & Destructor Documentation QwtPointSeriesData::QwtPointSeriesData…
QwtPointPolar – A point in polar coordinates. Synopsis #include <qwt_point_polar.h> Public Member Functions QwtPointPolar () 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()…
QwtPointMapper – A helper class for translating a series of points. Synopsis #include <qwt_point_mapper.h> Public Types enum TransformationFlag { RoundPoints = 0x01, WeedOutPoints = 0x02 } Flags affecting the transformation process. typedef QFlags < TransformationFlag > TransformationFlags" Flags affecting the transformation process. Public Member Functions QwtPointMapper () Constructor. ~QwtPointMapper () Destructor. void setFlags (TransformationFlags) TransformationFlags…
QwtPointArrayData – Interface for iterating over two QVector<double> objects. Synopsis #include <qwt_point_data.h> Inherits QwtSeriesData< QPointF >. Public Member Functions QwtPointArrayData (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…
QwtPoint3DSeriesData – Interface for iterating over an array of 3D points. Synopsis #include <qwt_series_data.h> Inherits QwtArraySeriesData< QwtPoint3D >. Public Member Functions QwtPoint3DSeriesData (const QVector< QwtPoint3D > &=QVector< QwtPoint3D >()) virtual QRectF boundingRect () const Calculate the bounding rectangle. Additional Inherited Members Detailed Description Interface for iterating over an array of 3D points. Constructor & Destructor…
QwtPoint3D – QwtPoint3D class defines a 3D point in double coordinates. Synopsis #include <qwt_point_3d.h> Public Member Functions QwtPoint3D () 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…
QwtPlotZoomer – QwtPlotZoomer provides stacked zooming for a plot widget. Synopsis #include <qwt_plot_zoomer.h> Inherits QwtPlotPicker. Public Slots void 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. Signals void zoomed (const QRectF &rect) Public Member Functions…
QwtPlotZoneItem – A plot item, which displays a zone. Synopsis #include <qwt_plot_zoneitem.h> Inherits QwtPlotItem. Public Member Functions QwtPlotZoneItem () 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 ()…
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 Types enum SymbolStyle { NoSymbol = -1, Bar, CandleStick, UserSymbol = 100 } Symbol styles. enum Direction { Increasing, Decreasing } Direction of a price movement. enum PaintAttribute { ClipSymbols =…
QwtPlotTextLabel – A plot item, which displays a text label. Synopsis #include <qwt_plot_textlabel.h> Inherits QwtPlotItem. Public Member Functions QwtPlotTextLabel () 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…
QwtPlotSvgItem – A plot item, which displays data in Scalable Vector Graphics (SVG) format. Synopsis #include <qwt_plot_svgitem.h> Inherits QwtPlotItem. Public Member Functions QwtPlotSvgItem (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…
QwtPlotSpectrogram – A plot item, which displays a spectrogram. Synopsis #include <qwt_plot_spectrogram.h> Inherits QwtPlotRasterItem. Public Types enum DisplayMode { ImageMode = 0x01, ContourMode = 0x02 } typedef QFlags< DisplayMode > DisplayModes Display modes. Public Member Functions QwtPlotSpectrogram (const QString &title=QString::null) virtual ~QwtPlotSpectrogram () Destructor. void setDisplayMode (DisplayMode, bool on=true) bool testDisplayMode (DisplayMode) const void setData…
QwtPlotSpectroCurve – Curve that displays 3D points as dots, where the z coordinate is mapped to a color. Synopsis #include <qwt_plot_spectrocurve.h> Inherits QwtPlotSeriesItem, and QwtSeriesStore< QwtPoint3D >. Public Types enum PaintAttribute { ClipPoints = 1 } Paint attributes. typedef QFlags< PaintAttribute > PaintAttributes Paint attributes. Public Member Functions QwtPlotSpectroCurve (const QString &title=QString::null) QwtPlotSpectroCurve (const QwtText…
QwtPlotShapeItem – A plot item, which displays any graphical shape, that can be defined by a QPainterPath. Synopsis #include <qwt_plot_shapeitem.h> Inherits QwtPlotItem. Public Types enum PaintAttribute { ClipPolygons = 0x01 } enum LegendMode { LegendShape, LegendColor } Mode how to display the item on the legend. typedef QFlags< PaintAttribute > PaintAttributes Paint attributes. Public Member…
QwtPlotSeriesItem – Base class for plot items representing a series of samples. Synopsis #include <qwt_plot_seriesitem.h> Inherits QwtPlotItem, and QwtAbstractSeriesStore. Inherited by QwtPlotAbstractBarChart, QwtPlotCurve, QwtPlotHistogram, QwtPlotIntervalCurve, QwtPlotSpectroCurve, and QwtPlotTradingCurve. Public Member Functions QwtPlotSeriesItem (const QString &title=QString::null) QwtPlotSeriesItem (const QwtText &title) virtual ~QwtPlotSeriesItem () Destructor. void setOrientation (Qt::Orientation) Qt::Orientation orientation () const virtual void draw (QPainter *p,…
QwtPlotScaleItem – A class which draws a scale inside the plot canvas. Synopsis #include <qwt_plot_scaleitem.h> Inherits QwtPlotItem. Public Member Functions QwtPlotScaleItem (QwtScaleDraw::Alignment=QwtScaleDraw::BottomScale, const double pos=0.0) Constructor for scale item at the position pos. virtual ~QwtPlotScaleItem () Destructor. virtual int rtti () const void setScaleDiv (const QwtScaleDiv &) Assign a scale division. const QwtScaleDiv & scaleDiv…
QwtPlotRescaler – QwtPlotRescaler takes care of fixed aspect ratios for plot scales. Synopsis #include <qwt_plot_rescaler.h> Inherits QObject. Public Types enum RescalePolicy { Fixed, Expanding, Fitting } enum ExpandingDirection { ExpandUp, ExpandDown, ExpandBoth } Public Member Functions QwtPlotRescaler (QWidget *canvas, int referenceAxis=QwtPlot::xBottom, RescalePolicy=Expanding) virtual ~QwtPlotRescaler () Destructor. void setEnabled (bool) En/disable the rescaler. bool isEnabled ()…
QwtPlotRenderer – Renderer for exporting a plot to a document, a printer or anything else, that is supported by QPainter/QPaintDevice. Synopsis #include <qwt_plot_renderer.h> Inherits QObject. Public Types enum DiscardFlag { DiscardNone = 0x00, DiscardBackground = 0x01, DiscardTitle = 0x02, DiscardLegend = 0x04, DiscardCanvasBackground = 0x08, DiscardFooter = 0x10, DiscardCanvasFrame = 0x20 } Disard flags. enum…
QwtPlotRasterItem – A class, which displays raster data. Synopsis #include <qwt_plot_rasteritem.h> Inherits QwtPlotItem. Inherited by QwtPlotSpectrogram. Public Types enum CachePolicy { NoCache, PaintCache } Cache policy The default policy is NoCache. enum PaintAttribute { PaintInDeviceResolution = 1 } typedef QFlags< PaintAttribute > PaintAttributes Paint attributes. Public Member Functions QwtPlotRasterItem (const QString &title=QString::null) Constructor. QwtPlotRasterItem (const…