QComboBox: Disabling mouse hover highlighting

[anshah]

@Pl45m4 I like your idea about the check icon for the selected item. How can I go about doing this?

[Pl45m4]

@anshah

I did it with stylesheet once, but I cant find my code. And I also dont know if it is intended to be possible, because I cant find anything in the docs, that says, that it is possible. It was a combination of different stylesheets

https://doc.qt.io/qt-5/stylesheet-examples.html#customizing-qcombobox

I played around with different combinations and suddenly an icon (small check) appeared left to the currently active item (without setting any item icon)

QComboBox QAbstractItemView {
    selection-background-color: /* COLOR */ ;
}
QComboBox QAbstractItemView::item {
// some color
}

QComboBox:item:selected {
// color
}

QComboBox QAbstractItemView:active {
// color
}

I dont know if it was a single stylesheet or the combination of them, which leads to this behavior.

When I've found my code again, I will post it here.

[VRonin]

@anshah said in QComboBox: Disabling mouse hover highlighting:

If highlight doesn't work I could also change the style (color, bold, font) of the selected item.

I think this is the quickest way. If your combobox uses the default model (i.e. you didn't call QComboBox::setModel) you can

QObject::connect(combobox,QOverload<int>::of(&QComboBox::currentIndexChanged),combobox,[=](int idx)->void{
    for(int i=0, maxI = combobox->count();i<maxI;++i){
        if(i==idx) combobox->setItemData(i,QBrush(Qt::green),Qt::BackgroundRole);
        else combobox->setItemData(i,QVariant(),Qt::BackgroundRole);
    }
});

EDIT thanks @JonB

[JonB]

@VRonin

        if(i==idx) combobox->setItemData(i,QBrush(Qt::green),Qt::BackgroundRole);
        combobox->setItemData(i,QVariant(),Qt::BackgroundRole);

Do you mean either an else in your code or swap the order of the two lines?

[Pl45m4]

@VRonin

In addition to that, you can emit comboBox->currentIndexChanged(0); to paint the default item's background green.
Otherwise it only works after changing the currentItem.

[anshah]

@Pl45m4 Much appreciated. I tried using a check mark PNG image and calling setItemIcon(index, icon) on the QComboBox but I still don't see the icon.

[anshah]

@VRonin Unfortunately we do call setModel. We set QSortFilterProxyModel to the ComboBox. How does the above connect change with that?

[anshah]

@Pl45m4 Where do I put the emit? After the if-else?

emit comboBox->currentIndexChanged(0);

[Pl45m4]

@anshah said in QComboBox: Disabling mouse hover highlighting:

Where do I put the emit?

After initialization. Or you set your first item's background to "green" manually.

[VRonin]

@anshah said in QComboBox: Disabling mouse hover highlighting:

How does the above connect change with that?

What's the underlying model you are using (I mean after all the proxies)?

[anshah]

@VRonin The best way I can explain is through the code. So here is my setup:

QComboBox* m_pComboBox = new QComboBox(this);
QSortFilterProxyModel* m_pSortFilterProxyModel = new QSortFilterProxyModel(this);

QStringList strList;  
m_pModel = new QStringListModel(strList, this);
    
m_pSortFilterProxyModel->setSourceModel(m_pModel);
m_pComboBox->setModel(m_pSortFilterProxyModel);