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Friday, August 19th 2016, 10:54am

interrupt based application

Hello Everybody,

At Outset ,I would like to thanks all for be with this QTforum.

My problem is......... I am trying to develop an application.In this application there are certain pages and which is displaying on the LCD on my board.and my board has a gpio button by default the value of this button is high when i press this button value of this button become low after releasing again high.i want to make my app interrupt based when i pressed hold button for 3 second display should be rotate and if i just press and release button page should change.In my app i have interface my gpio button.

QString btnInput = "/sys/class/gpio/gpioN/value";

in my apps i can read the vale of value file when my app start after that if i press button nothing will happen.what should i do.
how can i generate interrupt after pressing button.

please help me i am new in qt i start qt just before 2 week.