### - c -

- CacheSymbols : QwtPlotCurve
- CheckableItem : QwtLegend
- ClickableItem : QwtLegend
- ClipPoints : QwtPlotSpectroCurve
- ClipPolygons : QwtPlotCurve , QwtPlotIntervalCurve
- ClipSymbol : QwtPlotIntervalCurve
- Clockwise : QwtDial
- Columns : QwtPlotHistogram
- ContourMode : QwtPlotSpectrogram
- CopyBackingStore : QwtPlotDirectPainter
- CounterClockwise : QwtDial
- Cross : QwtSymbol , QwtPlotMarker
- CrossRubberBand : QwtPicker