Real Time Graph stops to replot while I click the main window

[Daniele90]

Hi everybody,
I have a very simple main window with a graph, a start button, and a stop button. The start button sends, via serial port, a command to a USB device connected; then the USB device connected starts to send back some data that I want to plot inside the graph. The real-time plot is performed inside
QObject::connect(&serial, &QSerialPort::readyRead, [&]
{
...
}
So, when some data arrives at the serial port, the signal readyRead is managed to collect the data and plot them. Everything works fine unless I click the main window; in that case, for all the time in which I keep pressing the mouse, the serial data are stored in the USB buffer but not handled. When I release the mouse, the replot resumes, without the data stored inside the USB buffer during the click. It seems like the readyRead signal is not handled if I click the main window. How can I solve this problem?
Thanks in advance,
Daniele

[kuzulis]

@Daniele90 , move QSP to thread.