Hello,

I've got two monitors in Linux configured as multi-screen, so I've two monitors connected to one graphic card. I'm trying to display a QWidget on upper or lower monitor using QDesktopWidget, but I'm doing something wrong because I can't do it.

I leave some code below to understand better my issue:

The class inherits QWidget:

Qt Code: 
  1. IFHMIQtGui(QWidget* parent, GUIDevice device)
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The constructor:

Qt Code: 
  1. IFHMIQtGui::IFHMIQtGui(QWidget* parent, GUIDevice device)
  2. {
  3.    QDesktopWidget pDesktop;
  4.    QWidget *qscreen;
  5.  
  6.    if (device == DEVICE_UPPER)
  7.    {
  8.        qscreen = pDesktop.screen(1);
  9.    }
  10.    else if (device == DEVICE_LOWER)
  11.    {
  12.        qscreen = pDesktop.screen(0);
  13.    }
  14.  
  15.   QWidget(qscreen);
  16. }
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I know that if I pass the QDesktopWidget to my IFHMIQtGui when I contruct the object, the QWidget is displayed on the right monitor. Anyway, the problem is that I need to use QDesktopWidget inside the IFHMIQtGui constructor.

Thank you.