How to Drag & Drop from QFileSystemModel QTreeView to Custom QTreeView



  • Hi Everybody,

    I have got a custom QTreeView which represents a folder structure with feature of internal drag & drop (based on Full drag and drop support in QTreeView).
    I have got an other QTreeView which has got a QFileSystemModel model.
    I would like to implement drag from QFileSystemModel QTreeView to Custom QTreeView.
    It is only a one-way "channel", so i don't want to drag an item from Custom QTreeView to QFileSystemModel QTreeView.

    Further informations:

    • acceptDrops property is true both of them
    • showDropIndicator property is true both of them
    • dragEnabled property is true both of them
    • dragDropMode property is CopyAction both of them

    Custom QTreeView's model has got the next overridden methods:

    Qt::DropActions TreeModel::supportedDropActions() const
    {
       return Qt::MoveAction;
    }
    
    Qt::DropActions TreeModel::supportedDragActions() const
    {
       return Qt::MoveAction;
    }
    Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
    {
       if (!index.isValid())
       {
          return Qt::ItemIsDropEnabled;
       }
       return QAbstractItemModel::flags(index) | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
    }
    

    How can i drag(copy) an item from QFileSystemModel QTreeView to Custom QTreeView?

    BR,
    Peter


  • Lifetime Qt Champion

    Hi,

    Take a look at the drag and drop part of the model view programming chapter in Qt's documentation.


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