Problem with QListWidget

[Elwe]

So, finally I've do my first idea. Here it's the code, it could help someone one day!

void DragNDropQListWidget::startDrag(Qt::DropActions) {
	int row = currentRow();
 
	QByteArray itemData;
	QDataStream dataStream(&itemData, QIODevice::WriteOnly);
 
	//We put the current row into datastream
	dataStream << row;
 
	QMimeData *mimeData = new QMimeData;
	mimeData->setData("application/x-dndgroup", itemData);
 
	QDrag *drag = new QDrag(this);
	drag->setMimeData(mimeData);
 
	drag->exec(Qt::MoveAction);
}
 
void DragNDropQListWidget::dropEvent(QDropEvent *event) {
	if (event->mimeData()->hasFormat("application/x-dndgroup")) {
		QListWidgetItem *itemToDrag;
		QByteArray itemData = event->mimeData()->data("application/x-dndgroup");
		QDataStream dataStream(&itemData, QIODevice::ReadOnly);
		int previousRow;
 
		//Will stock the target destination row
		int currentDropRow = row(itemAt(event->pos()));
 
		//We take the source row
		dataStream >> previousRow;
 
		//Beforhand, we've stock the itemWidget into a QList of QWidget*
		QVBoxLayout *vLayoutA = refWidget->at(previousRow);
		QWidget *wA = new QWidget;
		wA->setLayout(vLayoutA);
 
 
		QVBoxLayout *vLayoutTemp = refWidget->takeAt(previousRow);
		refWidget->insert(currentDropRow, vLayoutTemp);
 
		//We "remove" the item of the list
		itemToDrag = takeItem(previousRow);
		//Important, we have to remove the item widget, otherwise it will be blank widget.
		removeItemWidget(itemToDrag);
		//We insert the removed item into the destination
		insertItem(currentDropRow, itemToDrag);
		//And we reset the item widget.
		setItemWidget(itemToDrag, wA);
 
		setCurrentItem(itemToDrag);
 
		if (event->source() == this) {
			event->setDropAction(Qt::MoveAction);
			event->accept();
		} else {
			event->ignore();
		}
	} else {
		event->ignore();
	}
}

void DragNDropQListWidget::startDrag(Qt::DropActions) {
	int row = currentRow();

	QByteArray itemData;
	QDataStream dataStream(&itemData, QIODevice::WriteOnly);

	//We put the current row into datastream
	dataStream << row;

	QMimeData *mimeData = new QMimeData;
	mimeData->setData("application/x-dndgroup", itemData);

	QDrag *drag = new QDrag(this);
	drag->setMimeData(mimeData);

	drag->exec(Qt::MoveAction);
}

void DragNDropQListWidget::dropEvent(QDropEvent *event) {
	if (event->mimeData()->hasFormat("application/x-dndgroup")) {
		QListWidgetItem *itemToDrag;
		QByteArray itemData = event->mimeData()->data("application/x-dndgroup");
		QDataStream dataStream(&itemData, QIODevice::ReadOnly);
		int previousRow;
		
		//Will stock the target destination row
		int currentDropRow = row(itemAt(event->pos()));

		//We take the source row
		dataStream >> previousRow;

		//Beforhand, we've stock the itemWidget into a QList of QWidget*
		QVBoxLayout *vLayoutA = refWidget->at(previousRow);
		QWidget *wA = new QWidget;
		wA->setLayout(vLayoutA);


		QVBoxLayout *vLayoutTemp = refWidget->takeAt(previousRow);
		refWidget->insert(currentDropRow, vLayoutTemp);

		//We "remove" the item of the list
		itemToDrag = takeItem(previousRow);
		//Important, we have to remove the item widget, otherwise it will be blank widget.
		removeItemWidget(itemToDrag);
		//We insert the removed item into the destination
		insertItem(currentDropRow, itemToDrag);
		//And we reset the item widget.
		setItemWidget(itemToDrag, wA);

		setCurrentItem(itemToDrag);

		if (event->source() == this) {
			event->setDropAction(Qt::MoveAction);
			event->accept();
		} else {
			event->ignore();
		}
	} else {
		event->ignore();
	}
}

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For buttons who up and down items, use the same idea (save the widget created into a QList).