PBT_APMRESUMEAUTOMATIC not received in the nativeEventFilter in QT

ShikhaMishra

Re: Do an operation when computer goes to sleep

I tried the code in the given post,

#include <QAbstractEventDispatcher>

#include <QAbstractNativeEventFilter>

#include <windows.h>

class MyEventFilter : public QAbstractNativeEventFilter {

 public:

  virtual bool nativeEventFilter(const QByteArray& eventType, void* message, long*) Q_DECL_OVERRIDE {

    MSG* msg = static_cast< MSG* >( message );g->message == WM_POWERBROADCAST) {
  switch (msg->wParam) {
    case PBT_APMPOWERSTATUSCHANGE:
      qDebug() << ("PBT_APMPOWERSTATUSCHANGE  received\n");
      break;
    case PBT_APMRESUMEAUTOMATIC:
      qDebug() << ("PBT_APMRESUMEAUTOMATIC  received\n");
      break;
    case PBT_APMRESUMESUSPEND:
      qDebug() << ("PBT_APMRESUMESUSPEND  received\n");
      break;
    case PBT_APMSUSPEND:
      qDebug() << ("PBT_APMSUSPEND  received\n");
      break;
  }
}
return false; }};

and in mainwindow constructor
QAbstractEventDispatcher::instance()->installNativeEventFilter(new MyEventFilter);

but all I get is PBT_APMPOWERSTATUSCHANGE. Any Idea why?

Christian Ehrlicher

@ShikhaMishra said in PBT_APMRESUMEAUTOMATIC not received in the nativeEventFilter in QT:

I get is PBT_APMPOWERSTATUSCHANGE. Any Idea why?

Maybe because of this?

And please format your code with the code tags so it's readable for others.

ShikhaMishra

@Christian-Ehrlicher As per the post "In Windows 10, version 1507 systems or later, if the system is resuming from sleep only to immediately enter hibernation, this event is not delivered. A WM_POWERBROADCAST message is not sent in this case." But my system is not going into Hibernation after sleep. I will try on another system and check. Thanks for the reply!