QListWidget disable hover for item widget?

[Taytoo]

I'm using setItemWidget to set a widget for each item added to QListWidget. How do I disable hover effect for specific items/itemwidgets?

I've tried using stylesheet as proposed in other solutions but that doesn't work.

[Taytoo]

Finally, found a solution! The trick is Not to use hover modifier/attribute for disabled items

QListWidget::item:disabled,
QListWidget::item:!active,
{background: transparent;}

This stylesheet plus removing IsEnabled or IsSelectable flag for desired items will disable hover effect.

[SGaist]

Hi,

What exactly are you trying to do with your list widget ? As noted in the documentation and many posts on this forum, it should not be used beside showing some static content. If you need one widget per element then you should rather implement a custom QStyledItemDelegate.

[JoeCFD]

@Taytoo I guess the widget is on top of QListWidget item. Can you try to disable hovering for that widget(not list item) with style sheet since list item is empty(nullptr) in the cell of widget?

[Taytoo]

@SGaist said in QListWidget disable hover for item widget?:

Hi,

What exactly are you trying to do with your list widget ?

It will be used to show static content, typically around 5 items. I'm using setItemWidget since its much simpler than QStyledItemDelegate.
Only issue is that I'm insert a dummy item/widget for visual separation of certain items but when mouse moves over the dummy item/widget, there is hover (blue background) effect on that as well and I'd like to disable it.

[Taytoo]

@JoeCFD said in QListWidget disable hover for item widget?:

@Taytoo I guess the widget is on top of QListWidget item. Can you try to disable hovering for that widget(not list item) with style sheet since list item is empty(nullptr) in the cell of widget?

I tried following in stylesheet but didn't work:

QWidget::hover,
QWidget::disabled:hover,
QWidget::hover:!active,
{background: transparent;}

[JonB]

@Taytoo
Just a thought: is that "blue background" a hover for the cell/table, not the widget? Does your "empty" QWidget fill the cell? Because if it is "tiny" with no content maybe what you are seeing is cell background? I don't know.

[Taytoo]

@JonB Widget is as wide as QListWidget, but the QLabel is centered inside it (not stretched to edges of Widget).

[SGaist]

@Taytoo what are you showing ? Text ? Images ?

[Taytoo]

@SGaist Just text inside QLabel but the parent QWidget just has default background

[SGaist]

If it's just a background issue, just set the corresponding role in your model. It will simplify everything.

[Taytoo]

@SGaist What do you mean by set the corresponding role? I'm just adding items to QListWidget, not using Model/View like you have to with QListView

[JonB]

@Taytoo

• For a QListWidget any QListWidgetItem can call void QListWidgetItem::setBackground(const QBrush &brush).
• Or listWidget->model()->setData(index, brush, Qt::BackgroundRole) should do it.
• Or you could interpose a QAbstractProxyModel between the QListWidget and its supplied model(), where your proxy model overrides data() method to return the brush for the Qt::BackgroundRole role.

For the brush I think you can use QBrush(Qt::transparent) or perhaps plain Qt::transparent.

[Taytoo]

@JonB I'm a bit confused, how would setting the background brush disable Hover effect on QListWidget item widget?

[JoeCFD]

@Taytoo can you show a picture?

[JonB]

@Taytoo said in QListWidget disable hover for item widget?:

@JonB I'm a bit confused, how would setting the background brush disable Hover effect on QListWidget item widget?

I was just (hopefully, unless I got it wrong) fleshing out:
@SGaist said in QListWidget disable hover for item widget?:

If it's just a background issue, just set the corresponding role in your model. It will simplify everything.

when you asked

@SGaist What do you mean by set the corresponding role?

Perhaps he will explain if that simplifies things :)

[Taytoo]

@JonB Tried setting Background brush on Item. It has no effect on hover. If I change the background to Red, then item background is colored Red, but moving mouse over the widget still shows the hover effect (bluish color).

I'm starting to think maybe its a Qt bug or Qt on Windows 10 issue, because the suggested stylesheet fixes aren't working at all.

[SGaist]

@Taytoo your original stylesheet does not apply to items of an item view.
Try something like:

QListWidget::item:hover,
QListWidget::item:disabled:hover,
QListWidget::item:hover:!active,
{background: transparent;}

[Taytoo]

@SGaist I'm able to get hover effect to work if I remove the disabled modifier in stylesheet. But if an Item is disabled using code below (hoping this is correct way of disabling an item?), then the stylesheet doesn't work.

item->setFlags(item->flags() & ~Qt::ItemIsEnabled);

[Taytoo]

@SGaist said in QListWidget disable hover for item widget?:

@Taytoo your original stylesheet does not apply to items of an item view.
Try something like:

QListWidget::item:hover,
QListWidget::item:disabled:hover,
QListWidget::item:hover:!active,
{background: transparent;}

Experimented a bit using this stylesheet. It works Only on Enabled items. If I remove IsSelectable flag or IsEnabled flag, then the stylesheet doesn't work and normal hover effect is shown.
I've even tried disabling the widget that I'm setting for the item using setItemWidget, still didn't work.

[Taytoo]

Finally, found a solution! The trick is Not to use hover modifier/attribute for disabled items

QListWidget::item:disabled,
QListWidget::item:!active,
{background: transparent;}

This stylesheet plus removing IsEnabled or IsSelectable flag for desired items will disable hover effect.