QNANWidgets is a collection of science/engineering oriented Qt Widgets to help in creating sci/eng. applications and include a chart and plot widget. The widgets are easy to use and can be customized in Qt Designer directly.
Chart widget in Qt designer showing some user defined series
Data series editor in front of chart widget in Qt designer.
QNANColorMapPlot widget showing a grid with holes
QNANColorMapPlot widget showing a non-orthogonal grid