Hi,
I use a nested layout widget instance in my subclass of QMainWindow. At runtime I get the following message on console:

QLayout: Attempting to add QLayout "" to SchulungsplanParentWidget "", which already has a layout

Do you know why ? The gui seems to be correct...

This is my constuctor of the Widget class which is the center in my QMainWindow:
Qt Code: 
  1. SchulungsplanParentWidget::SchulungsplanParentWidget(QDate& p_startViewDate, QDate& p_endViewDate, QWidget *p_parent)
  2. 	: QWidget(p_parent)
  3. {
  4. 	QVBoxLayout *vBoxLayout = new QVBoxLayout(this);
  5. 	QHBoxLayout *hBoxLayout = new QHBoxLayout(this);
  6.  
  7. 	m_startViewDateLabel= new QLabel("Schulungsplan VON:");
  8. 	m_startViewDateEdit = new QDateEdit(p_startViewDate);
  9. 	m_endViewDateLabel	= new QLabel("Schulungsplan BIS:");
  10. 	m_endViewDateEdit  	= new QDateEdit(p_endViewDate);
  11. 	m_uebernehmenButton = new QPushButton("Uebernehmen");
  12.  
  13. 	m_spTableView 		= new SchulungsplanView(this);
  14.  
  15. 	hBoxLayout->addWidget(m_startViewDateLabel, 1, Qt::AlignLeft);
  16. 	hBoxLayout->addWidget(m_startViewDateEdit, 2, Qt::AlignLeft);
  17. 	hBoxLayout->addWidget(m_endViewDateLabel, 1, Qt::AlignLeft);
  18. 	hBoxLayout->addWidget(m_endViewDateEdit, 2, Qt::AlignLeft);
  19. 	hBoxLayout->addWidget(m_uebernehmenButton, 1, Qt::AlignLeft);
  20.  
  21. 	vBoxLayout->addLayout(hBoxLayout);
  22. 	vBoxLayout->addWidget(m_spTableView);
  23.  
  24. 	connect( m_uebernehmenButton, SIGNAL(clicked() ),
  25. 				this, SLOT(uebernehmenButtonPressed() ) );
  26. }
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