QDockWidget: Debugging crash

[carsten]

This is the current code, still crashing. As soon as I make the m_dockWin a child of "this" it is *in* the mainwindow. So that cannot be right.

m_dockWin = new QDockWidget("test");
    Q_CHECK_PTR( m_dockWin );
 
    m_toolbox = new QToolBox( this );
    Q_CHECK_PTR( m_toolbox );
 
    m_dockWin->setWidget( m_toolbox );
    m_dockWin->setAllowedAreas( Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea );

m_dockWin = new QDockWidget("test");
    Q_CHECK_PTR( m_dockWin );

    m_toolbox = new QToolBox( this );
    Q_CHECK_PTR( m_toolbox );

    m_dockWin->setWidget( m_toolbox );
    m_dockWin->setAllowedAreas( Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea );

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I noticed this in the shell when executing Kalzium

QLayout::addChildWidget: QToolBox "" in wrong parent; moved to correct parent

class Kalzium is:

Kalzium::Kalzium()
    : KMainWindow( 0, "Kalzium" )
{

Kalzium::Kalzium()
    : KMainWindow( 0, "Kalzium" )
{

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I don't know the check-pointer-macro, but I don't see any information in the shell. Is this supposed to help in gdb?

[MarkoSan]

Like axeljaeger said, you should also use addDockWidget().

[carsten]

Ok, I just debugged a little more. The problem seems to be that KMainWindow does *not* inherit from QMainWindow but from Q3MainWindow. And Q3MainWindow doesn't know anything about QDockWidget but only about QDockWindow. Therefore, somewhere in the Q3Compatlib it crashes.
So somebody needs to port KMainWindow of KDE4 first.