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Thread: Disable wheel event for a QComboBox inside a QListWidgetItem

  1. #1
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    Question Disable wheel event for a QComboBox inside a QListWidgetItem

    Hello all,

    I am using a QTablewidget with different widgets in different columns. The trouble begins when there are more rows to fit the view and you need to scroll. One of the columns is holding a QComboBox and when you use the scroll wheel and your mouse happens to be over a column with a QComboBox you scroll the QComboBox instead of the table view. I tried setting:
    Qt Code:
    1. combbbox->setFocusPolicy(Qt::TabFocus);
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    but it does not help.

    Any suggestion of how to make it react to a scroll wheel only when it already has focus?

    Markus

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    Default Re: Disable wheel event for a QComboBox inside a QListWidgetItem

    Why not override the mouse wheel event with event->ignore() ?

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    Default Re: Disable wheel event for a QComboBox inside a QListWidgetItem

    I expect that reimplementing the QComboBox::wheelEvent() to look something like this would be a start (untested):
    Qt Code:
    1. void MyComboBox::wheelEvent( QWheelEvent * e)
    2. {
    3. if (hasFocus())
    4. QComboBox::wheelEvent(e);
    5. else
    6. e->ignore();
    7. }
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  4. The following user says thank you to ChrisW67 for this useful post:

    Markus (19th March 2014)

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    Default Re: Disable wheel event for a QComboBox inside a QListWidgetItem

    Thanks, sub-classing will work. I was wondering if there is another way.

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    Default Re: Disable wheel event for a QComboBox inside a QListWidgetItem

    The cleaner approach is to do the override event handling in a subclass, but you can always install an event filter instead.

    See QObject::eventFilter()

    Cheers,
    _

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