Problems with multiple selection in Drag & Drop

[JonSim]

Hi Guys,

I have encountered problem in dragging and dropping multiple QLabel and QWidget at the same time (multiple selection of QLabel & QWidget) which I have used in my application. In my application, there are images and texts needed to be drag & drop together.

Can someone please help in solving this problem? Written below are the codes I have written in my MainWindow.cpp file.
Thank You

void MainWindow::mousePressEvent(QMouseEvent *event)
{
    QWidget *child = static_cast<QWidget *>(childAt(event->pos()));
     if (!child)
     return;
 
    QPoint hotSpot = event->pos() - child->pos();
    QString textdata = child->styleSheet();                                         [COLOR="#FF0000"] //not sure if this syntax is correct[/COLOR]
 
    QByteArray itemData;
    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
    dataStream << textdata << hotSpot;
 
    QMimeData *mimeData = new QMimeData;
    mimeData->setData("mydatatype", itemData);
 
    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(textdata);
    drag->setHotSpot(hotSpot);
 
 
    if (drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction) == Qt::MoveAction)
    {
        child->close();
    }
    else 
    {
        child->show();
        child->setStyleSheet(textdata);                [COLOR="#FF0000"]//not sure if this syntax is correct[/COLOR]
    }
}

void MainWindow::mousePressEvent(QMouseEvent *event)
{
    QWidget *child = static_cast<QWidget *>(childAt(event->pos()));
     if (!child)
     return;
 
    QPoint hotSpot = event->pos() - child->pos();
    QString textdata = child->styleSheet();                                         [COLOR="#FF0000"] //not sure if this syntax is correct[/COLOR]
 
    QByteArray itemData;
    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
    dataStream << textdata << hotSpot;
 
    QMimeData *mimeData = new QMimeData;
    mimeData->setData("mydatatype", itemData);
 
    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(textdata);
    drag->setHotSpot(hotSpot);

 
    if (drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction) == Qt::MoveAction)
    {
        child->close();
    }
    else 
    {
        child->show();
        child->setStyleSheet(textdata);                [COLOR="#FF0000"]//not sure if this syntax is correct[/COLOR]
    }
}

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[anda_skoa]

If you want to drag the stylesheet information of a widget then that's a way of adding that to QMimeData.
The setStyleSheet() would of course be done at the drop location.

Cheers,
_

[JonSim]

I like to drag all the QLabel found in my GUI around. There are QImage applied to the QLabel. But i am unable to drag it as a while(multiple selection for all the QLabel)

[anda_skoa]

I am afraid I don't understand.

If you want to drag labels, why create a data drag and not just move the labels?

Cheers,
_