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Thread: Strange behaviour with QWidget

  1. #1
    Join Date
    Nov 2007
    Location
    Italy
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    Qt products
    Qt4
    Platforms
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    Default Strange behaviour with QWidget

    Hi to all,
    I trying to write my PanelInfo inherited from QWidget on top of my WaveWidget.
    Basically I show it only when needed ( pressing a button ).
    The strange thing is that when set as visible it's shown as transparent instead of opaque.
    Here I write some code. In the WaveWidget ctor I create it and I place where I want:

    Qt Code:
    1. m_panel = new PanelInfo(this);
    2. m_panel->move(400,0);
    3. m_panel->resize(100,100);
    4. m_panel->setVisible(false); // Initially I don't want show it
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    than I have a button that should show the little panelinfo in the released signal:

    Qt Code:
    1. connect( m_showPanelBtn, SIGNAL( released() ), this, SLOT( onShowInfoPanel() ) );
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    and finally the code to show it:

    Qt Code:
    1. void WaveWidget::onShowInfoPanel()
    2. {
    3. if( !m_panel->isVisible() )
    4. m_panel->setVisible(true);
    5. }
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    The problem is that the panel is shown completely transparent and I see the other widget that are placed beside it ( see the image ).panelInfo.jpg
    I also tried to set the opacity to 1.0 but nothing change. How can I do to show it opaque and not transparent?

    Best Regards
    Franco Amato

  2. #2
    Join Date
    Dec 2009
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    Qt products
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    Platforms
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    Default Re: Strange behaviour with QWidget

    I would try not to give a parent to the PanelInfo, or give some Qt::Tool (or Qt::Window) WindowFlag in its constructor

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