c++ - Getting "QFile::rename: Empty or null file name" when dropping file to QTreeView -

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i have qsplitter of :

  • left side qtreeview showing local system file using qfilesystemmodel

  • right side have qwebview html page showing directory , file name line line returned api.

i want make drag , drop application. have enable drag , drop required functions working internally on own view.

but want drag , drop between these 2 views, , when doing this, it's showing plus icon correctly, when dropping file, showing in console :

qfile::rename: empty or null file name

here's code :

qstringlistmodel *model1 = new qstringlistmodel(); qstringlist *stringlist = new qstringlist(); view2->setupdatesenabled(true); view2->setacceptdrops(true);   if(oldname == "" || cpe == "") {     oldname = cpe; } else {     oldname = oldname + " / " + cpe; } view2->page()->mainframe()->addtojavascriptwindowobject("mainwindow",newmyjavascriptoperations);  qstring mypage;  qtextstream p(&mypage);  p << "<!doctype html>";  p <<"<html><head>\n<link rel='stylesheet' type='text/css'"; {width:350px;height:70px;padding:10px;border:1px solid #aaaaaa;} </style>"; p << " href='webview.css' />\n"; p <<"<link href='file:///d:/qt/qt_js/bootstrap.min.css' rel='stylesheet'>"; p << "<style type='text/css'>body { color:black }; </style>"; p<<"<script src='file:///d:/qt/qt_js/selectcpe.js'></script>"; p << "<body ondragstart='return true'>"; p << "<ol class='breadcrumb'>"; if(cpe == null){     qdebug()<<"cpe1";     p << "<li class='active'>"<<cpename<<"</li>"; } else{     qdebug()<<"cpe2";     p << "<li><a href='javascript:void(0)' onclick = 'cpecontent()'>"<<cpename<<"</a></li>";     p << "<li class='active'>"<<oldname<<"</li>"; } p<<"</ol>"; </div>"; p<<"<div class='row'>"; while(tmp!= null) {      if (tmp->isdir)    {           p<<"<div class='col-lg-3'>";        p<< "<a draggable='true'  width='336' height='69'       href='javascript:void(0)' onclick = 'opendir(this.id)' id="<< tmp->filename<<">";        p << "<img src='file:///d:/qt/qt_js/manilla_gnome_fs_directory.png' class='logo'><br>";        p <<"dirname: "<< tmp->filename <<"</a></div>";    }    else    {        p<<"<div class='col-lg-3'>";        p<< "<a href='javascript:void(0)' draggable='true'>";        p << "<img src='file:///d:/qt/qt_js/document_folder_blue.png' class='logo'><br>";        float size = tmp->size/(1024*1024);        p <<"filename: "<< tmp->filename <<"<br>"<<"size: "<<size<<" mb</a></div>";    }     p<<"<br><br><br>";    tmp = (filenode_t *)tmp->next; } p<<"</div>"; if(head) {    qdebug()<<"display"; } else {    p <<"no contents..."; } model1->setstringlist(*stringlist);  freefilelist(head); head = null; view2->sethtml(mypage); view2->setacceptdrops(true); qdebug() << "in main2 method"; view1->hide(); //tree qdebug() << "in main3 method"; qfilesystemmodel *model = new qfilesystemmodel; model->setreadonly(false); qstring dir("c:/sample"); model->setrootpath(dir); tree->update(); tree->repaint(); tree->resize(1100, 550); tree->setmodel(model); tree->setrootindex(model->index((dir))); tree->setselectionmode(qabstractitemview::extendedselection); tree->setdragenabled(true); tree->settextelidemode(qt::elidemiddle); tree->viewport()->setacceptdrops(true); tree->setacceptdrops(true); tree->setdropindicatorshown(true); tree->setdefaultdropaction(qt::copyaction); tree->setdragdropmode(qabstractitemview::dragdrop); splitter->setacceptdrops(true); splitter->addwidget(tree); splitter->addwidget(view2); splitter->resize(1100, 550); splitter->setwindowtitle("<- local files , api files ->"); splitter->show();


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