Highlight items of treeview during Drag n Drop

scayetanot

Hi,

i have tried to highlight the item I'm currently hover when moving the mouse during a DnD.

By the way, it doesn't work. It doesn't work during the Drag'Drop but only after when no more DnD but just mouse move. I just want the highlight when DnD and not before or after

I have enable the highlight by:

@void TreeView::dragMoveEvent(QDragMoveEvent * event)
{
qDebug() << "On Drag Move Event";
const QMimeData* mimeData = event->mimeData();

event->setDropAction(Qt::CopyAction);

if (mimeData->hasUrls())
{
    QTreeWidgetItem *item = itemAt(event->pos());
    if(item) {
        qDebug() << "itemat: " << item->text(0);

#if 0
setStyleSheet(QString::fromUtf8("QTreeWidget::item:hover {\n"
"background-color: rgb(123, 45, 67);\n"
"}"));
#endif
}
event->setDropAction(Qt::CopyAction);
event->acceptProposedAction();
}
else
event->ignore();

// dropSite = event->answerRect();
// event->acceptProposedAction();
}@

DBoosalis

I would suggest you use your own Delegate and handle the styling in its paint() method.

scayetanot

I tried to implement something with :

@void TreeView::paintEvent ( QPaintEvent* event )
{
QTreeView::paintEvent (event);
QPainter painter ( viewport() );
int x, y, w, h;
dropSite.getRect ( &x, &y, &w, &h );
QPoint point(x,y);
QModelIndex modidx = indexAt ( point );
QRect arect = visualRect ( modidx );
int b = arect.y();
QBrush brush(Qt::black, Qt::Dense4Pattern);
QPen pen;
pen.setWidth(2);
pen.setBrush(brush);
painter.setPen(pen);
painter.drawLine ( 0, b, width(), b );
event->accept();
}@

but it's not really working fine. if you can point me to an example using QtreeWidget it will be perfect.