Drag and Drop.

The drag & drop function is not working properly.

1. first, I set the grid as below: ( Qt 5.15.9 )

spView->options().setDragEnabled( true );
spView->options().setDropEnabled( true );
spView->options().setDragDropMode( QAbstractItemView::DragDrop );
spView->options().setSupportedDropActions( Qt::CopyAction | Qt::MoveAction );
spView->options().setModelItemsDragEnabled( true );

connect( spView, &Qtitan::GridViewBase::startDragDrop, this, &QDlgExplorer::oo_grdLocal_startDragDrop );
connect( spView, &Qtitan::GridViewBase::endDragDrop, this, &QDlgExplorer::oo_grdLocal_endDragDrop );
connect( spView, &Qtitan::GridViewBase::checkDragDrop, this, &QDlgExplorer::oo_grdLocal_checkDragDrop );
connect( spView, &Qtitan::GridViewBase::dragDrop, this, &QDlgExplorer::oo_grdLocal_dragDrop );


2. startDragDrop and endDragDrop are called, but checkDragDrop and dragDrop are not.

Also, in startDragDrop


void QDlgExplorer::oo_grdLocal_startDragDrop( DragArgs* Args )
{ if
FUNC_OBJ_TO( logger, Args->row() );
viewClickTimer.stop();
auto data = new QMimeData;
data->setImageData( driveIcon );

Args->setMimeData( data );
Args->setSupportedDropActions( Qt::CopyAction | Qt::MoveAction );
Args->setDefaultDropAction( Qt::DropAction::CopyAction );

Args->setAccepted( true );
//Args->setHandled( true );
}

No matter what combination of setAccepted and sethandled you use above, the mouse cursor's icon will be banned when you start dragging.

3. endDragDrop is called, but the Args passed in always contain no value.

4. After debugging the internal code, I realized that QDrag::Exec always returns Qt::IgnoreAction. What is the reason for this?

5. If I change the value set in spView->options().setSupportedDropActions( Qt::CopyAction | Qt::MoveAction );; in 1) to Qt::InternalMove, the same happens.

---

What you want: Notification of Drag & Drop inside the Grid, notification when items inside the Grid are dragged and dropped outside the Grid (to another widget or another process (Desktop, Windows Explorer, etc.. ) ), notification when items are dragged and dropped into the Grid from inside or outside the Grid.

hm... hello?? anybody??

Could you please specify what version of grid are you using? Do you have the opportunity to send us a complete example to reproduce the problem?

Note that checkDragDrop is called when the drag data comes from outside. This event usually occurs by QWidget::dragMoveEvent(QDragMoveEvent* event). In general, the handling the drag-drop is similar to that is using in the regular Qt table.

Args->setAccepted( true ); - This code line is needed to pass the accept flag to the Qt events that was the reason.
Args->setHandled( true ); This flag should be set if you take control for the drag-drop operation. If it is true - next, you must fill the mime-data, call QDrag::exec() and so on. Usually, this is not necessary and the grid does it automatically.

i use 8.0 beta1,

ps. When is the official release date for 8.0?

The public beta version will be released in the second half of August and the final release will be in September.