OK, found the answer in the docs for QVariant
upon further inspection.
This works:
QImage image = variant.value<QImage>();
Question
I want to extract a QIcon I've stored in one of a QTreeWidget's columns, as Qt::DecorationRole.
QTreeWidgetItem *item = ui->treeWidget->topLevelItem(index);
const QIcon &icon = item->data(0, Qt::DecorationRole)._howToConvert_();
However, I can only get the data as QVariant, and I could not find a function to convert from a QVariant to QIcon. Is it possible to do it?
La solution
OK, found the answer in the docs for QVariant
upon further inspection.
This works:
QImage image = variant.value<QImage>();
Autres conseils
I find the solution as follows:
QImage name_image = table_store_multi_model_->item(i_row,0)->data(Qt::DecorationRole).value().toImage();
Generally, we read data with data(), but here need a parameter "Qt::DecorationRole";