QStyledItemDelegate with custom paint() background color from selection / item-type

gde23

Hello,

I have a StyledItemDelegate with a custom paint method

void myDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,const QModelIndex &index) const
{
    QWidget* editor = m_my_editor_widegt;      

    QStyleOptionViewItem opt = option;
    QStyledItemDelegate::initStyleOption(&opt, index);

    setDummyEditorData(editor, index);
    editor->resize(opt.rect.size());
    editor->setPalette(opt.palette);
    QPixmap pixmap(opt.rect.size());
    editor->render(&pixmap);
    painter->drawPixmap(opt.rect,pixmap);
}

the editor is a QWidget with other stuff in there (label, checkbox, lineedit, ...)
The rowcolor of my view is dependent of the item type and is provided by ItemModel::data(Qt::BackgroundColorRole).

How do I tell the delegate to draw the widget with the right color?

Gojir4

Hi @gde23,

I think it should be something like that (not tested):

QColor background = index.data(Qt::BackgroundRole).toColor();
opt.palette.setColor(QPalette::Active, QPalette::Window, background)

gde23

@Gojir4 said in QStyledItemDelegate with custom paint() background color from selection / item-type:

QColor background = index.data(Qt::BackgroundRole).toColor();
opt.palette.setColor(QPalette::Active, QPalette::Window, background)

I've tried that, but that results in the widget looking totally colorful (each pixel random) like uninitialized memory.

EDIT: Now its working, had to paint it with the background first since the background color of the items has alpha

Gojir4

@gde23 Glad it works !

EDIT: Now its working, had to paint it with the background first since the background color of the items has alpha

Sorry but I don't understand what do you mean ?