Styling a QListView with custom widgets

[ALz]

Hello,

I am trying to customize the look of my application using stylesheets, which has proven to be rather challenging given my loathing of CSS. I would very much appreciate if someone with more experience could help me shed some light on this.

I have a QListView and I want to have a hovering effect for its items. In the constructor of the widget that contains that QListView (in this case, called groupListView), I do this:

ui->groupsListView->setObjectName(QString("GroupsListView"));
ui->groupsListView->setStyleSheet(QString("QListView#GroupsListView::item:hover { background: #000000; }"));

ui->groupsListView->setObjectName(QString("GroupsListView"));
ui->groupsListView->setStyleSheet(QString("QListView#GroupsListView::item:hover { background: #000000; }"));

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Now, the QListView has an item delegate, which builds and displays a custom widget. The paint event of the custom widget looks like this:

QPainter painter(this);
QStyleOption opt;
opt.init(this);
style()->drawPrimitive(QStyle::PE_Widget, &opt, &painter, this);
painter.setRenderHint(QPainter::Antialiasing, true);

QPainter painter(this);
QStyleOption opt;
opt.init(this);
style()->drawPrimitive(QStyle::PE_Widget, &opt, &painter, this);
painter.setRenderHint(QPainter::Antialiasing, true);

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However, when I hover my mouse over the custom widget, nothing happens.

Is that because I have a custom widget? I can't style anything in the item itself.

If so, is there anything special I should pay attention to in the custom widget code? I have also tried to achieve this from the custom widgets' stylesheet, by setting the widget's stylesheet to something like this:

QWidget#GroupMeterListWidget {
        color: #ffffff;
        border: 1px solid black;
        border-radius: 3px;
        padding: 1px;
        background: qlineargradient(
              x1:0, y1:0, x2:0, y2:1,
              stop:0 #bec1d2,
              stop: 0.4 #717990,
              stop: 0.5 #5c637d,
              stop:1 #68778e);
    }
 
    :hover{
         color: #ffffff;
         border: 1px solid black;
         border-radius: 3px;
         padding: 1px;
         background: qlineargradient(
                 x1:0, y1:0, x2:0, y2:1,
                 stop:0 #ced1e2,
                 stop: 0.4 #8189a0,
                 stop: 0.5 #6c738d,
                 stop:1 #78879e);
     }

QWidget#GroupMeterListWidget {
        color: #ffffff;
        border: 1px solid black;
        border-radius: 3px;
        padding: 1px;
        background: qlineargradient(
              x1:0, y1:0, x2:0, y2:1,
              stop:0 #bec1d2,
              stop: 0.4 #717990,
              stop: 0.5 #5c637d,
              stop:1 #68778e);
    }

    :hover{
         color: #ffffff;
         border: 1px solid black;
         border-radius: 3px;
         padding: 1px;
         background: qlineargradient(
                 x1:0, y1:0, x2:0, y2:1,
                 stop:0 #ced1e2,
                 stop: 0.4 #8189a0,
                 stop: 0.5 #6c738d,
                 stop:1 #78879e);
     }

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(please ignore the horribly-looking colors, I just tried to make them noticeable).

This actually works in Qt Designer, but if I try to set it in code, in the constructor of the custom widget, the first part works fine, but -- again -- when I hover over the widget, nothing happens. It seems like they would not trigger the hover event -- for the sake of it, I tried to override enterEvent and leaveEvent and they did not seem to fire.

I dug through the Qt docs for some indication about this but I haven't been able to find anything relevant. Can anyone give me a quick idea about where to look?

Thanks!

Edit: I just noticed it slipped my mind -- I am using Qt version 4.7.4 on a Linux machine with gcc 4.5.1. It's from the official Fedora 14 repositories, if it's of any importance, but I have access at pretty much any version (this one is on one of my work computers which it would appear I have been rather lazy to maintain ).