QCustomPlot Discussion and Comments

cannot get signal of plottableDoubleClickReturn to overview

hi All:
i implement a simple feaure, when i double click the graph, MainWindow wil response the signal:ottableDoubleClick, and disaplay the details of the graph.
i want to trace the data on the line, so i create a QCPItemText, QCPItemline to display the data infomation.
but then, the MainWindow cannot get the signal ottableDoubleClick when i double click the graph.

i want to know why, and how to fix it.

thanks.

i know why.
because the double click object is QItemTracer.