Here is a list of all documented class members with links to the class documentation for each member:

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- offsetInCanvas() : QwtPlotLegendItem
- Opaque : QwtPlotCanvas
- open : QwtOHLCSample
- operator!=() : QwtInterval , QwtIntervalSample , QwtIntervalSymbol , QwtPoint3D , QwtPointPolar , QwtScaleDiv , QwtSetSample , QwtSplinePolynomial , QwtText
- operator&() : QwtInterval
- operator&=() : QwtInterval
- operator=() : QwtGraphic , QwtIntervalSymbol , QwtPainterCommand , QwtScaleMap , QwtText
- operator==() : QwtInterval , QwtIntervalSample , QwtIntervalSymbol , QwtPoint3D , QwtPointPolar , QwtScaleDiv , QwtSetSample , QwtSplinePolynomial , QwtText
- operator|() : QwtInterval
- operator|=() : QwtInterval
- Option : QwtPlotLayout , QwtPolarLayout
- Options : QwtPlotLayout , QwtPolarLayout
- orientation() : QwtColumnRect , QwtPlotRescaler , QwtPlotSeriesItem , QwtPlotZoneItem , QwtScaleDraw , QwtSlider , QwtThermo , QwtWheel
- orientations() : QwtPanner
- origin() : QwtDial , QwtThermo
- OriginCenter : QwtPlotVectorField
- OriginCustom : QwtThermo
- OriginHead : QwtPlotVectorField
- OriginMaximum : QwtThermo
- OriginMinimum : QwtThermo
- OriginMode : QwtThermo
- originMode() : QwtThermo
- OriginTail : QwtPlotVectorField
- OtherFormat : QwtText
- Outline : QwtPlotHistogram
- QwtOHLCSample() : QwtOHLCSample