Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

CActivityLog
CAudioDial	AudioDial is a nicer-looking QDial that by default reacts to mouse movement on horizontal and vertical axes instead of in a radial motion
CClickableLabel
CColour3DPlotLayer	This is a view that displays dense 3-D data (time, some sort of binned y-axis range, value) as a colour plot with value mapped to colour range
▼CColourDatabase
CColourRec
CColourMapper	A class for mapping intensity values onto various colour maps
CColourNameDialog
CColourScaleLayer
CCommandHistory	Stores a list of executed commands and maintains Undo and Redo actions synchronised with those commands
CCSVFormatDialog
CFader	Horizontal audio fader and meter widget
CFlexiNoteLayer
CIconLoader
CImageDialog
CImageLayer
CImageRegionFinder
CInteractiveFileFinder
CItemEditDialog
▼CKeyReference
CKeyDetails
CLabelCounterInputDialog
▼CLayer	The base class for visual representations of the data found in a Model
CAddMeasurementRectCommand
CDeleteMeasurementRectCommand
CMeasureRect
CLayerFactory
CLayerTreeDialog
CLayerTreeModel
▼CLEDButton
CLEDButtonPrivate
CLinearColourScale
CLinearNumericalScale
CListInputDialog	Like QInputDialog::getItem(), except that it offers the items as a set of radio buttons instead of in a single combo box
CLogColourScale
CLogNumericalScale
CMIDIFileImportDialog
CModelDataTableDialog
CModelMetadataModel
CNoteLayer
CNotifyingCheckBox	Very trivial enhancement to QCheckBox to make it emit signals when the mouse enters and leaves (for context help)
CNotifyingComboBox	Very trivial enhancement to QComboBox to make it emit signals when the mouse enters and leaves (for context help)
CNotifyingPushButton	Very trivial enhancement to QPushButton to make it emit signals when the mouse enters and leaves (for context help)
CNotifyingTabBar
COverview
CPaintAssistant
CPane
▼CPaneStack
CPaneRec
CPanner
CPianoScale
▼CPluginParameterBox
CParamRec
CPluginParameterDialog	A dialog for editing the parameters of a given plugin, using a PluginParameterBox
CProgressDialog
CPropertyBox
CPropertyStack
CRangeInputDialog
CRegionLayer
CSelectableLabel
CShowLayerCommand
CSingleColourLayer
CSliceableLayer	Base class for layers that can be sliced, that is, that contain models appropriate for use in a SliceLayer
CSliceLayer
▼CSpectrogramLayer	SpectrogramLayer represents waveform data (obtained from a DenseTimeValueModel) in spectrogram form
CImageCache	ImageCache covers the area of the view, at view resolution
CLayerRange
CMagnitudeRange
CPalette
CSpectrogramRangeMapper
CSpectrumLayer
CSubdividingMenu	A menu that divides its entries into submenus, alphabetically
CTextAbbrev
CTextLayer
CThumbwheel
CTimeInstantLayer
CTimeRulerLayer
CTimeValueLayer
▼CTipDialog
CTipFileParser
CTransformFinder
CVerticalScaleLayer
▼CView	View is the base class of widgets that display one or more overlaid views of data against a horizontal time scale
CProgressBarRec
▼CViewManager	The ViewManager manages properties that may need to be synchronised between separate Views
CSetSelectionCommand
CViewPropertyContainer
CWaveformLayer
CWindowShapePreview
CWindowTypeSelector