I am running into a situation where I create a QSystemTrayIcon in the constructor of the main widget. But when I try to call show on it, it outputs about a dozen "Cannot move to target thread" messages. It still displays and is usable, but it is disconcerting to get any error messages. Here is the code:
Qt Code: 
  1. IngestorGUI::IngestorGUI()
  2. {
  3. 	if(QSystemTrayIcon::isSystemTrayAvailable())
  4. 	{
  5. 		m_ptr_SystemTrayIcon = new QSystemTrayIcon();
  6. 		m_TrayIcon = QIcon("dmax_icon.png");
  7. 		m_ptr_SystemTrayIconContextMenu = new QMenu(this);
  8. 		m_ptr_actShowGui = new QAction(this);
  9. 		m_ptr_actShowGui->setText("Show Interface");
  10. 		m_ptr_actShowGui->setCheckable(true);
  11. 		connect(m_ptr_actShowGui,SIGNAL(changed()),this,SLOT(slotShowInterface()));
  12. 		m_ptr_SystemTrayIconContextMenu->addAction(m_ptr_actShowGui);
  13. 		m_ptr_SystemTrayIcon->setIcon(m_TrayIcon);
  14. 		m_ptr_SystemTrayIcon->setContextMenu(m_ptr_SystemTrayIconContextMenu);
  15. 		m_ptr_SystemTrayIcon->show();
  16. 	}
  17. }
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On a side note; Is there any way to force explorer to update the system tray when I shut down? It never seems to update until I mouse over it. I tried to hide the icon before deleting, but it still didn't update. here is my destructor code:
Qt Code: 
  1. IngestorGUI::~IngestorGUI()
  2. {
  3. 	if(m_ptr_actShowGui != (QAction*) NULL)
  4. 	{
  5. 		delete m_ptr_actShowGui;
  6. 	}
  7. 	if(m_ptr_SystemTrayIconContextMenu != (QMenu*) NULL)
  8. 	{
  9. 		delete m_ptr_SystemTrayIconContextMenu;
  10. 	}
  11. 	if(m_ptr_SystemTrayIcon != (QSystemTrayIcon*)NULL)
  12. 	{
  13. 		m_ptr_SystemTrayIcon->hide();
  14. 		delete m_ptr_SystemTrayIcon;
  15. 	}
  16. }
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