Plot real time signal from Arduino to QCustomPlot

[Macive Xiong]

Hi,

I am doing a project that I would like to catch the signal from Arduino when buzzer being touched and plot the real time signal on Qt QCustomPlot. My Arduino Code :

#define Buzzer_Pin 8

void setup() {
  Serial.begin(9600);
  pinMode(Buzzer_Pin, INPUT);

}

void loop() {
  Serial.println(digitalRead(Buzzer_Pin));

}

I already know how to connect the Qt to Arduino but I don't know how to write the code to make Qt widget plot buzzer signal.
My buzzer signal in Serial plotter is:
http://imgur.com/a/P9Xb8

Could you guys give me some example to show how to write the code in the widget to show the plot like Serial Plotter in Arduino?

Thank you guys:)