Do not paint selection in QStyledItemDelegate

[jgirlich]

We have a very complicated custom coloring scheme for a delegate in a QTableWidget. We do need the SelectionModel though, so setSelectionMode(QAbstractItemView::NoSelection) is not an option.

I tried to overwrite the paint function like this:

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItemV4 noSelectionOption(option);
  initStyleOption(&noSelectionOption, index);
  noSelectionOption.showDecorationSelected = false;
 
  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItemV4 noSelectionOption(option);
  initStyleOption(&noSelectionOption, index);
  noSelectionOption.showDecorationSelected = false;

  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

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But the Texts in the cells are still drawn with blue background and white foreground.

How can I fix this?

[wysota]

Remove QStyle::State_Selected from QStyleOption::state

[jgirlich]

Added one line of code as to your suggestion and it works like a charm now.

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItemV4 noSelectionOption(option);
  initStyleOption(&noSelectionOption, index);
  noSelectionOption.showDecorationSelected = false;
  noSelectionOption.state &= ~QStyle::State_Selected;
 
  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItemV4 noSelectionOption(option);
  initStyleOption(&noSelectionOption, index);
  noSelectionOption.showDecorationSelected = false;
  noSelectionOption.state &= ~QStyle::State_Selected;

  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

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Thanks a lot!

[wysota]

FYI, this would have been enough:

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItem noSelectionOption(option);
  noSelectionOption.state &= ~QStyle::State_Selected;
  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

void LineEditDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItem noSelectionOption(option);
  noSelectionOption.state &= ~QStyle::State_Selected;
  QStyledItemDelegate::paint(painter, noSelectionOption, index);
}

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