| QwtAbstractScale | An abstract base class for classes containing a scale |
| QwtAbstractScaleDraw | A abstract base class for drawing scales |
| QwtAbstractSlider | An abstract base class for slider widgets |
| QwtAlphaColorMap | QwtAlphaColorMap variies the alpha value of a color |
| QwtAnalogClock | An analog clock |
| QwtArrowButton | Arrow Button |
| QwtClipper | Some clipping algos |
| QwtColorMap | QwtColorMap is used to map values into colors |
| QwtColumnSymbol | A drawing primitive for columns |
| QwtCounter | The Counter Widget |
| QwtCurveFitter | Abstract base class for a curve fitter |
| QwtDoubleInterval | A class representing an interval |
| QwtDoublePoint3D | QwtDoublePoint3D class defines a 3D point in double coordinates |
| QwtDoubleRange | A class which controls a value within an interval |
| QwtDynGridLayout | Lays out widgets in a grid, adjusting the number of columns and rows to the current size |
| QwtIntervalSymbol | A drawing primitive for bars |
| QwtKnob | The Knob Widget |
| QwtLegend | The legend widget |
| QwtLegendItem | |
| QwtLegendItemManager | Abstract API to bind plot items to the legend |
| QwtLinearColorMap | QwtLinearColorMap builds a color map from color stops |
| QwtLinearScaleEngine | A scale engine for linear scales |
| QwtLog10ScaleEngine | A scale engine for logarithmic (base 10) scales |
| QwtPainter | A collection of QPainter workarounds |
| QwtPlot | A 2-D plotting widget |
| QwtPlotAbstractSeriesItem | |
| QwtPlotCanvas | Canvas of a QwtPlot |
| QwtPlotCurve | A plot item, that represents a series of points |
| QwtPlotCurve3D | |
| QwtPlotDict | A dictionary for plot items |
| QwtPlotDirectPainter | |
| QwtPlotGrid | A class which draws a coordinate grid |
| QwtPlotHistogram | |
| QwtPlotIntervalCurve | |
| QwtPlotItem | Base class for items on the plot canvas |
| QwtPlotLayout | Layout engine for QwtPlot |
| QwtPlotMarker | A class for drawing markers |
| QwtPlotPicker | QwtPlotPicker provides selections on a plot canvas |
| QwtPlotPrintFilter | A base class for plot print filters |
| QwtPlotRasterItem | A class, which displays raster data |
| QwtPlotScaleItem | A class which draws a scale inside the plot canvas |
| QwtPlotSeriesItem< T > | |
| QwtPlotSpectrogram | A plot item, which displays a spectrogram |
| QwtPlotSvgItem | A plot item, which displays data in Scalable Vector Graphics (SVG) format |
| QwtPlotZoomer | QwtPlotZoomer provides stacked zooming for a plot widget |
| QwtRoundScaleDraw | A class for drawing round scales |
| QwtSamplingThread | |
| QwtScaleArithmetic | Arithmetic including a tolerance |
| QwtScaleDiv | A class representing a scale division |
| QwtScaleDraw | A class for drawing scales |
| QwtScaleEngine | Base class for scale engines |
| QwtScaleMap | A scale map |
| QwtScaleTransformation | Operations for linear or logarithmic (base 10) transformations |
| QwtScaleWidget | A Widget which contains a scale |
| QwtSlider | The Slider Widget |
| QwtSpline | A class for spline interpolation |
| QwtSplineCurveFitter | A curve fitter using cubic splines |
| QwtSymbol | A class for drawing symbols |
| QwtSystemClock | QwtSystemClock provides high resolution clock time functions |
| QwtText | A class representing a text |
| QwtTextLabel | A Widget which displays a QwtText |
| QwtThermo | The Thermometer Widget |
| QwtWeedingCurveFitter | A curve fitter implementing Douglas and Peucker algorithm |
| QwtWheel | The Wheel Widget |
1.6.2