StyleSheet with QStyledItemDelegate.

samdol

I made a ListView to show pixmap as an icon and applied stylesheet.
The stylesheet works if I don't apply CustomItemDelegate which is the subclassing of QStyledItemDelegate. The stylesheet also works fine if I don't reimplement paint() in CustomItemDelegate.

Is there any method which makes it possible to apply stylesheet while I use QStyledItemDelegate where paint() is reimplemented?

 list_view = new QListView();
 list_view->setStyleSheet(" QListView::item:deselected { border: 1px solid black; border-radius: 6px; color: black; } QListView::item:selected {background: white; border: 4px solid green;}");
    itemDelegate = new CustomItemDelegate(list_view);
    list_view->setItemDelegate( itemDelegate );
 list_view->setModel(myModel);

VRonin

Yes, you just need to use QApplication::style() when painting on the delegate.

Could you show us the delegate paint method?

raven-worx

@samdol said in StyleSheet with QStyledItemDelegate.:

Is there any method which makes it possible to apply stylesheet while I use QStyledItemDelegate where paint() is reimplemented?

only calling the base class implementation (or do the respective painting call on the style)

void paint(QPainter *painter,   const QStyleOptionViewItem &option, const QModelIndex &index) const
{
 QStyleOptionViewItem opt = option;
 this->initStyleOption(&opt, index);

    const QWidget *widget = option.widget;
    QStyle *style = widget ? widget->style() : QApplication::style();
    style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, widget);
}

Now you could remove the text and the icon from the styleoption before passing it to the drawControl() method. This ensures that the background, border, selection is properly drawn.

samdol

@VRonin
Here is my paint() for my delegate.
CustomType is the metaType I defined(for example, stars).
It displays well except I could not see the effect of setStylesheet anymore.
Instead of QApplication::style(), I tried the suggestion (which is commented out), but I don't see any change.

void CustomItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (index.data(Qt::DecorationRole).canConvert<CustomType>() ) {
CustomType myType = qvariant_cast<CustomType>(index.data(Qt::DecorationRole));
if (option.state & QStyle::State_Selected)
painter->fillRect(option.rect, option.palette.highlight());
else
painter->fillRect(option.rect, option.palette.background());
myType.paint(painter, option.rect, option.palette, CustomType::ReadOnly);

    QRect rect=option.rect;
    QRect button_rect;
    button_rect.setRect(rect.x(),0,rect.width(), myType.text_height);
    button_rect.setY(rect.y()+ myType.pixmap_size.height());
    button_rect.setHeight( myType.text_height );
    QStyleOptionButton button;
    button.rect = button_rect;
    button.text = myType.dirfn;
    button.state = state;

    QStyleOptionViewItem opt = option;
    this->initStyleOption(&opt, index);

      // const QWidget *widget = option.widget;
      // QStyle *style = widget ? widget->style() : QApplication::style();
      // style->drawControl(QStyle::CE_CheckBox, &button, painter);

    QApplication::style()->drawControl(QStyle::CE_CheckBox, &button, painter);

} else {
    QStyledItemDelegate::paint(painter, option, index);
}

}