QCustomPlot Discussion and Comments

How to draw time frequency diagram with QCPColorMapReturn to overview

hi,all! I need to draw a time frequency diagram,i decide to use QCPColorMap,but i failed! Anyone know what can i do ?

https://blog.csdn.net/qq10097355/article/details/105741397
https://blog.csdn.net/qq10097355/article/details/106126578