Drag and Drop, MoveAction not deleting original position?

maximus

Hi,

I have set 2 QListWidget that accept drag and drop,
I'm moving one widget from list#1 to list#2, the item get copied but not moved, i'm trying to figure out why?
Here is a screenshot of it :
https://www.dropbox.com/s/ylm70suadtna9s3/DragDropInt.png

Here is the current code :

custom QListView

@myQListWidget::myQListWidget(QWidget *parent) :QListWidget(parent)
{
setAcceptDrops(true);
setDragDropMode(DragDrop);
setDefaultDropAction(Qt::MoveAction);
setDragEnabled(true);
setDropIndicatorShown(true);
}

void myQListWidget::dragEnterEvent(QDragEnterEvent *event) {

qDebug() << "dragEnterEvent";
if (event->mimeData()->hasFormat("mt/interval") ) {
    qDebug() << "OK CAN ACCEPT DROP!";
    event->acceptProposedAction();
}

}
void myQListWidget::dropEvent(QDropEvent *event) {

qDebug() << "dropEvent";

if (event->proposedAction() == Qt::MoveAction) {

    qDebug() << "EVENT SOURCE :" << event->source();
    /// Take QByteArray and create object from it
    //        const QMimeData *data = event->mimeData();
    //        QByteArray dataArray = data->data("mt/interval");


    QListWidgetItem* item;
    item = new QListWidgetItem(this);
    this->addItem(item);

    IntervalWidget *intervalWidget = new IntervalWidget();
    item->setSizeHint(intervalWidget->minimumSizeHint());
    this->setItemWidget(item, intervalWidget);

    event->acceptProposedAction();

    //        QListWidget::dropEvent(event);
}

}@

Custom Widget

@
if (event->button() == Qt::LeftButton)
dragStartPosition = event->pos();
}

void IntervalWidget::mouseMoveEvent(QMouseEvent *event) {

if (!(event->buttons() & Qt::LeftButton))
    return;
if ((event->pos() - dragStartPosition).manhattanLength()
        < QApplication::startDragDistance())
    return;

QDrag *drag = new QDrag(this);
QMimeData *mimeData = new QMimeData;

QByteArray output;
/// Write object to QByteArray
mimeData->setData("mt/interval", output);
drag->setMimeData(mimeData);

// //// Image when moving the widget
QPixmap pixmap(this->rect().size());
this->render(&pixmap, QPoint(), QRegion(this->rect()));
drag->setPixmap(pixmap);

Qt::DropAction dropAction = drag->exec&#40;Qt::MoveAction&#41;;

}@

maximus

edited

SGaist

Hi,

Did you look at "this":http://qt-project.org/doc/qt-5/model-view-programming.html#using-convenience-views about the model view classes and d&d ?