Delayed Rendering of QTabWidget Tabs

[mclark]

Not so crazy, Marcel. The guy that maintains those libraries has given me a version with increased thread priority. While it makes the response better, it doesn't entirely solve the problem.

[marcel]

m_tabACN_Gen = new ACNGenTab( this );
    m_tabWidget->addTab( m_tabACN_Gen, tr(GENERAL_TAB.toAscii().data()) );
 
    m_tabACN_Ports = new ACNPortsTab( this );
    m_tabWidget->addTab( m_tabACN_Ports, tr(PORTS_TAB.toAscii().data()) );
 
    m_tabACN_AIP = new ACNAIPTab( m_pNode, m_pMainWin, this );
    m_tabWidget->addTab( m_tabACN_AIP, tr("AIP") );

m_tabACN_Gen = new ACNGenTab( this );
    m_tabWidget->addTab( m_tabACN_Gen, tr(GENERAL_TAB.toAscii().data()) );
 
    m_tabACN_Ports = new ACNPortsTab( this );
    m_tabWidget->addTab( m_tabACN_Ports, tr(PORTS_TAB.toAscii().data()) );
 
    m_tabACN_AIP = new ACNAIPTab( m_pNode, m_pMainWin, this );
    m_tabWidget->addTab( m_tabACN_AIP, tr("AIP") );

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I just noticed this. You create the m_TabACN* forms with this as parent ( meaning the dialog ). But the parent should be m_tabWidget, otherwise the dialog wil lsend all kinds of events to the forms. You should really modify this.

You can also try updatesEnabled( false ) on the forms after you create them . This wil make them not receive resize or paint events. You enable the updates just before making them visible.

[mclark]

It appears that the boosted priority background thread and Marcel's parenting suggestion (along with taking numerous closer looks at my code) has made things acceptable. Some of the drawing is a little sluggish but the devices don't regularly go offline now.

wysota and marcel, thank's so much for your time!