QTreeWidgen in QDockWidget doesn't receive dragEnterEvent when it is undocked

ChanchoCiego

Hello, good day,

I have a QTreeWidgen within a QDockWidget that when docked receives and processes of Drag & Drop events correctly, but when it is undocked you receive nothing. Is this normal?

This is the statement:

@
class ListaWidget : public QListWidget
{
Q_OBJECT

QPoint              dragStartPosition;

public:

ListaWidget(QString nombre, QWidget *parent) : QListWidget(parent)
{
    this->setIconSize(QSize(24,24));
    this->setFlow(QListView::LeftToRight);
    this->setWrapping(true);
    this->setViewMode(QListView::IconMode);
    this->setResizeMode(QListView::Adjust);
    this->setWordWrap(true);
    this->setObjectName(nombre);
    setDragEnabled(true);
    setAcceptDrops(true);
}

void dragEnterEvent(QDragEnterEvent *event);
void dragMoveEvent(QDragMoveEvent *event);
void dragLeaveEvent(QDragLeaveEvent *event);
void dropEvent(QDropEvent *event);

void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);

signals:
void informacion(QString info);
};
@

And this is the implementation:

@
//-----------------------------------------------------------------------------

void ListaWidget::mousePressEvent(QMouseEvent *event)
{
emit informacion("void ListaWidget::mousePressEvent(QMouseEvent *event)");

if (event->button() == Qt::LeftButton)
{
    dragStartPosition = event->pos();
    emit informacion("\tQt::LeftButton");
}
else if ( event->button() == Qt::RightButton )
{
    emit informacion("\tQt::RightButton");
}

}

//-----------------------------------------------------------------------------

void ListaWidget::mouseMoveEvent(QMouseEvent *event)
{
if (!(event->buttons() & Qt::LeftButton))
return;
if ((event->pos() - dragStartPosition).manhattanLength()
< QApplication::startDragDistance())
return;

emit informacion("void ListaWidget::mouseMoveEvent(QMouseEvent *event)");

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

QList <QUrl> urls;
QUrl url("file:///E:/Descargas/dcpcrypt2-xe-update2.zip");

        emit informacion("\turls.append(url);");
urls.append(url);
        emit informacion("\tmimeData->setText(this->objectName());");
mimeData->setText(this->objectName());
        emit informacion("\tmimeData->setUrls(urls);");
mimeData->setUrls(urls);
        emit informacion("\tdrag->setMimeData(mimeData);");
drag->setMimeData(mimeData);

        emit informacion("\tdrag->exec&#40;Qt::CopyAction&#41;;");
drag->exec&#40;Qt::CopyAction&#41;;
        emit informacion("\t######## FIN ########");

}

//-----------------------------------------------------------------------------

void ListaWidget::dragEnterEvent(QDragEnterEvent *event)
{
event->acceptProposedAction();
}

//-----------------------------------------------------------------------------

void ListaWidget::dragMoveEvent(QDragMoveEvent *event)
{
event->acceptProposedAction();
}

//-----------------------------------------------------------------------------

void ListaWidget::dragLeaveEvent(QDragLeaveEvent *event)
{
event->accept();
}

//-----------------------------------------------------------------------------

void ListaWidget::dropEvent(QDropEvent *event)
{
emit informacion("void ListaWidget::dropEvent(QDropEvent *event)");

if (event->mimeData()->hasText())
{
    if (event->mimeData()->text() == this->objectName())
    {
        emit informacion("\tSALIENDO de void ListaWidget::dropEvent(QDropEvent *event)");
        return;
    }
}

// extrae los datos mime del evento
const QMimeData *mimeData = event->mimeData();

// identifica el dato mime recibido
if (mimeData->hasImage())
    emit informacion(tr("\t######## Imagen ########"));
else if (mimeData->hasHtml())
    emit informacion(tr("\t######## HTML : ") + mimeData->html());
else if (mimeData->hasText())
    emit informacion(tr("\t######## TEXT : ") + mimeData->text());
else if (mimeData->hasUrls())
{
    QList<QUrl> urlList = mimeData->urls();

    emit informacion("------------------------------------");
    for (int i = 0; i < urlList.size() && i < 32; ++i)
    {
        emit informacion(tr("\t") + urlList.at(i).path());
    }
    emit informacion("------------------------------------");
}
else
    emit informacion(tr("No se pueden mostrar los datos"));

for (int i=0; i<mimeData->formats().count(); i++)
    emit informacion("\t" + mimeData->formats().value(i));
emit informacion("------------------------------------");

event->acceptProposedAction();

}

//-----------------------------------------------------------------------------
@