JKQTPlotter
an extensive Qt4/Qt5 Plotter framework (including a fast variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies
Collaboration diagram for Filled Polygon/Area Graphs:
Screenshot Classes
JKQTPFilledCurveXGraph, JKQTPFilledCurveYGraph
JKQTPFilledCurveXErrorGraph, JKQTPFilledCurveYErrorGraph
JKQTPFilledVerticalRangeGraph