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

ClickableLabel	Class derived from QLabel which additionally fires the clicked-signal when mousePressEvent is detected
DataItem	Represents a single layer of the stacked graph
DataLoader	Responsible for loading data sets from file or generating random data to use
DataSet	The data set
GraphColorizer	Class provides coloring for the graph layers by using linear interpolation
GraphItem	A subclass of QGraphicsPathItem, mainly used to hide the selection rectangle
GraphLayouter	Derived classes provide layouting functionality
GraphScene	A QGraphicsScene subclass which is responsible for the creation, drawing and rendering of a stacked graph
GraphSorter	Derived classes provide sorting functionality for the graph layers, usign different algorithms
GraphView	A QGraphicsView with special handling for GraphScene scenes
INamedObject	Interface for objects which have a name
InsideOutGraphSorter	Class describes a sorting algorithm which sorts the DataSet in order to put the first elements of the sorted list near the baseline and the last to the outside The dataitems are added to the top and bottom alternating
LayoutInfo	Contains info for layouting
MainForm	The main window of the application
MainFormPrivate
MinWiggleGraphLayouter	Class describes a layouting algorithm which minimizes the sum of squares of the layer slopes at each data value
OnTopGraphSorter	Class describes a naive sorting algorithm which sorts the DataSet by simply stacking the elements onto each other
StackGraphLayouter	Class describes a naive layouting algorithm with a straight baseline at zero
StreamGraphLayouter	Class describes the layouting algorithm used in the streamgraph stacked graph The baseline is calculated by using numeric integration
ThemeRiverGraphLayouter	Class describes the themeriver layouting algorithm which simply centers the baseline and therefore the stacked graph
WeightedGraphSorter	Class describes a sorting algorithm which sorts the DataSet in order to put the first elements of the sorted list near the baseline and the last to the outside The dataitems are added to the top if the sum of all items at the top is less than the sum of all items at the bottom or at the bottom otherwise