Here are the classes, structs, unions and interfaces with brief descriptions:
[detail level 12]
  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 |
| QwtArraySeriesData | Template class for data, that is organized as QVector |
| QwtArrowButton | Arrow Button |
| QwtClipper | Some clipping algos |
| QwtColorMap | QwtColorMap is used to map values into colors |
| QwtColumnRect | Directed rectangle representing bounding rectangle und orientation of a column |
| QwtColumnSymbol | A drawing primitive for columns |
| QwtCompass | A Compass Widget |
| QwtCompassMagnetNeedle | A magnet needle for compass widgets |
| QwtCompassRose | Abstract base class for a compass rose |
| QwtCompassWindArrow | An indicator for the wind direction |
| QwtCounter | The Counter Widget |
| QwtCPointerData | Data class containing two pointers to memory blocks of doubles |
| QwtCurveFitter | Abstract base class for a curve fitter |
| QwtDial | QwtDial class provides a rounded range control |
| QwtDialNeedle | Base class for needles that can be used in a QwtDial |
| QwtDialScaleDraw | A special scale draw made for QwtDial |
| QwtDialSimpleNeedle | A needle for dial widgets |
| 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 |
 QwtEventPattern | A collection of event patterns |
| QwtInterval | A class representing an interval |
| QwtIntervalSample | A sample of the types (x1-x2, y) or (x, y1-y2) |
| QwtIntervalSeriesData | Interface for iterating over an array of intervals |
| QwtIntervalSymbol | A drawing primitive for displaying an interval like an error bar |
| QwtKnob | The Knob Widget |
| QwtLegend | The legend widget |
| QwtLegendItem | A widget representing something on a QwtLegend() |
| 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 |
| QwtMagnifier | QwtMagnifier provides zooming, by magnifying in steps |
| QwtMathMLTextEngine | Text Engine for the MathML renderer of the Qt solutions package |
| QwtMatrixRasterData | A class representing a matrix of values as raster data |
| QwtNullPaintDevice | A null paint device doing nothing |
| QwtPainter | A collection of QPainter workarounds |
| QwtPanner | QwtPanner provides panning of a widget |
| QwtPicker | QwtPicker provides selections on a widget |
| QwtPickerClickPointMachine | A state machine for point selections |
| QwtPickerClickRectMachine | A state machine for rectangle selections |
| QwtPickerDragPointMachine | A state machine for point selections |
| QwtPickerDragRectMachine | A state machine for rectangle selections |
| QwtPickerMachine | A state machine for QwtPicker selections |
| QwtPickerPolygonMachine | A state machine for polygon selections |
| QwtPickerTrackerMachine | A state machine for indicating mouse movements |
| QwtPlainTextEngine | A text engine for plain texts |
| QwtPlot | A 2-D plotting widget |
| QwtPlotAbstractSeriesItem | Base class for plot items representing a series of samples |
| QwtPlotCanvas | Canvas of a QwtPlot |
| QwtPlotCurve | A plot item, that represents a series of points |
| QwtPlotDict | A dictionary for plot items |
| QwtPlotDirectPainter | Painter object trying to paint incrementally |
| QwtPlotGrid | A class which draws a coordinate grid |
| QwtPlotHistogram | QwtPlotHistogram represents a series of samples, where an interval is associated with a value ( ![$y = f([x1,x2])$](form_1.png) ) |
| QwtPlotIntervalCurve | QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( ![$[y1,y2] = f(x)$](form_2.png) ) |
| QwtPlotItem | Base class for items on the plot canvas |
| QwtPlotLayout | Layout engine for QwtPlot |
| QwtPlotMagnifier | QwtPlotMagnifier provides zooming, by magnifying in steps |
| QwtPlotMarker | A class for drawing markers |
| QwtPlotPanner | QwtPlotPanner provides panning of a plot canvas |
| QwtPlotPicker | QwtPlotPicker provides selections on a plot canvas |
| QwtPlotRasterItem | A class, which displays raster data |
| QwtPlotRenderer | Renderer for exporting a plot to a document, a printer or anything else, that is supported by QPainter/QPaintDevice |
| QwtPlotRescaler | QwtPlotRescaler takes care of fixed aspect ratios for plot scales |
| QwtPlotScaleItem | A class which draws a scale inside the plot canvas |
| QwtPlotSeriesItem | Class template for plot items representing a series of samples |
| QwtPlotSpectroCurve | Curve that displays 3D points as dots, where the z coordinate is mapped to a color |
| 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 |
| QwtPoint3D | QwtPoint3D class defines a 3D point in double coordinates |
| QwtPoint3DSeriesData | Interface for iterating over an array of 3D points |
| QwtPointArrayData | Interface for iterating over two QVector<double> objects |
| QwtPointPolar | A point in polar coordinates |
| QwtPointSeriesData | Interface for iterating over an array of points |
| QwtRasterData | QwtRasterData defines an interface to any type of raster data |
| QwtRichTextEngine | A text engine for Qt rich texts |
| QwtRoundScaleDraw | A class for drawing round scales |
| QwtSamplingThread | A thread collecting samples at regular intervals |
| 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 | A transformation between coordinate systems |
| QwtScaleWidget | A Widget which contains a scale |
| QwtSeriesData | Abstract interface for iterating over samples |
| QwtSetSample | A sample of the types (x1...xn, y) or (x, y1..yn) |
| QwtSetSeriesData | Interface for iterating over an array of samples |
| QwtSimpleCompassRose | A simple rose for QwtCompass |
| QwtSlider | The Slider Widget |
| QwtSpline | A class for spline interpolation |
| QwtSplineCurveFitter | A curve fitter using cubic splines |
| QwtSymbol | A class for drawing symbols |
| QwtSyntheticPointData | Synthetic point data |
| QwtSystemClock | QwtSystemClock provides high resolution clock time functions |
| QwtText | A class representing a text |
| QwtTextEngine | Abstract base class for rendering text strings |
| QwtTextLabel | A Widget which displays a QwtText |
| QwtThermo | The Thermometer Widget |
| QwtWeedingCurveFitter | A curve fitter implementing Douglas and Peucker algorithm |
 QwtWheel | The Wheel Widget |
