Version:            (using KDE KDE 3.4.0)
Installed from:    Compiled From Sources

I encounter a bug with Swallow layout for KDialogBase.
I don't have this bug with other layouts (Page, Tabbed...).

Here is a code snippet:

NewBasketDialog::NewBasketDialog(QWidget *parent)
 : KDialogBase(KDialogBase::Swallow, i18n("New Basket"), KDialogBase::Ok | KDialogBase::Cancel, KDialogBase::Ok, parent, /*name=*/0, /*modal=*/true, /*separator=*/true)
{
	QWidget *page = new QWidget(this);
	setMainWidget(page);
	QVBoxLayout *topLayout = new QVBoxLayout(page, /*margin=*/0, spacingHint());
	m_templates = new QIconView(page);
	topLayout->addWidget(m_templates);
	m_templates = new QIconView(page);
	topLayout->addWidget(m_templates);
	m_templates = new QIconView(page);
	topLayout->addWidget(m_templates);
	m_templates = new QIconView(page);
	topLayout->addWidget(m_templates);
}

The 4 new QIconView creations are to populate the dialog with big widgets.

Now, call dialog.exec() and the dialog is NOT CENTERED.
In fact it's somewhat centered on its parent but as if the dialog were empty...
The x and y position of the dialog seems to be computed during the setMainWidget(page) and if page change its size afterward KDialogBase doesn't care.

A workarround is to move the line "setMainWidget(page);" at the END of the constructor, and then the dialog is well centered depending on its real content.

BTW, the 3 first lines of this constructor and took from the documentation, so every programer that copy/paste those examples will encounter the bug.