Receive event when pc wake up

bpar

Hi all,

I am new with Qt. I know that this topic is old and probably it's solved but I don't find the solution. I am trying to implement a code that runs when the pc returns from suspend state. I've tried with WM_POWERBROADCAST but doesn't work.
Attached my code:

header:

  #include <QAbstractNativeEventFilter>
  #include <QObject>
  #include <QWidget>
  #include <windows.h>

 class windowsEvents : public QWidget, public QAbstractNativeEventFilter
 {   
      public:
             windowsEvents();
             virtual bool nativeEventFilter(const QByteArray &eventType, void *message, long *) Q_DECL_OVERRIDE;
 };

class:

#include <winuser.h>

windowsEvents::windowsEvents()
{
    RegisterSuspendResumeNotification((HANDLE)this, DEVICE_NOTIFY_WINDOW_HANDLE);
}

bool windowsEvents::nativeEventFilter(const QByteArray &eventType, void *message, long *) {

    MSG *msg = static_cast<MSG *>(message);

    if (msg->message == WM_POWERBROADCAST) {
        if (msg->wParam == PBT_APMRESUMESUSPEND ) {
            //code
        }
    }
return false;
}

Main:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    windowsEvents devEventFilterObj;
    QAbstractEventDispatcher::instance()->installNativeEventFilter(&devEventFilterObj);

   return app.exec();
}

What is it wrong? What do i need to change?
Thanks you

SGaist

Hi and welcome to devnet,

You might want to check the implementation from this thread.

bpar

@SGaist

Thanks for your reply. I am checking that thread and I can't find any difference with my code.

In the thread it used rundll32.exe powrprof.dll, SetSuspendState 0,1,0 to sleep but I don't use those commands. I use the Windows key -> suspend. Could is it the problem?

Thank you in advance.

SGaist

It is structured differently not mixing the event dispatcher with a widget.

Did you test it ?
What about yours when using SetSuspendState ?

bpar

@SGaist thanks for your answers.
Finally, I found the solution. I didn't use the right handle for register solution.