Hello friends, now I try to locate my error in my logic.

here are a piece of my app:

Qt Code: 
  1. //**************************************************************************
  2. void MdlProjektErstellung::newOrderSpace()
  3. //**************************************************************************
  4. {
  5.     bool ok1,ok2;
  6.     QString dir = QFileDialog::getExistingDirectory(this, tr("open group path"),
  7.                                                     "C:",
  8.                                                      QFileDialog::ShowDirsOnly
  9.                                                      | QFileDialog::DontResolveSymlinks);
  10.     QString WorkspaceName = QInputDialog::getText(this, tr("groupname"),
  11.                                               tr("Group"), QLineEdit::Normal,
  12.                                               "Name", &ok1);
  13.     QString ProjektAnzahl = QInputDialog::getText(this, tr("Projektinput"),
  14.                                               tr("Projektcount"), QLineEdit::Normal,
  15.                                               "1", &ok2);
  16.  
  17.     vector<string> vecProjektDateien;
  18.     this->m_actualWorkSpaceFile.clear();
  19.     this->m_actualWorkSpaceFile.append(dir);
  20.     this->m_actualWorkSpaceFile.append("/");
  21.     this->m_actualWorkSpaceFile.append(WorkspaceName);
  22.     this->m_actualWorkSpaceFile.append(".ert");
  23.     OrderSpace* ActualSpace = new OrderSpace(dir.toAscii().data(),
  24.                                              WorkspaceName.toAscii().data(),
  25.                                              ProjektAnzahl.toInt(),
  26.                                              vecProjektDateien);
  27.     tableModel = new QStandardItemModel;
  28.     tableModel->setRowCount(0) ;
  29.     int Max_Number_of_Columns(1);
  30.     int Max_Number_of_Lines(0);
  31.     tableModel->setColumnCount(Max_Number_of_Columns) ;
  32.  
  33.     for (vector <string>::iterator vItr=vecProjektDateien.begin(); vItr != vecProjektDateien.end(); ++vItr)
  34.     {
  35.             string tstr=(*vItr).c_str();
  36.             QStandardItem * item = new QStandardItem(tstr.c_str());
  37.             tableModel->setItem(Max_Number_of_Lines, 0, item) ;
  38.  
  39.         Max_Number_of_Lines++;
  40.     }
  41.  
  42.     this->myOrderView->setModel(tableModel);
  43.     this->myOrderView->setAlternatingRowColors(true);
  44.     this->myOrderView->resizeColumnsToContents();
  45.     this->myOrderView->setEditTriggers(QAbstractItemView::NoEditTriggers);
  46.  
  47.     connect(this->myOrderView, SIGNAL(clicked(const QModelIndex)), this, SLOT(GetProjectItem(const QModelIndex &)));
  48.  
  49.  
  50. }
  51.  
  52.  
  53. //**************************************************************************
  54. void MdlProjektErstellung::GetProjectItem(const QModelIndex& index)
  55. //**************************************************************************
  56. {
  57. QString str;
  58. str=tableModel->data(index,0).toString();
  59.  
  60. MdlProjektMaske* AktProjektMaske = new MdlProjektMaske(str,this->m_actualWorkSpaceFile);
  61. AktProjektMaske->show();
  62. //connect(AktProjektMaske, SIGNAL(closed()), AktProjektMaske, SLOT(deleteLater()));
  63. }
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when I run newOrderSpace() my tableview fills with Item and when I click on them getProjectItem() runs. And I get my Qwidget AktProjektMaske.

The Problem now when I run newOrderSpace n times I get n QWidgets when I click on my Item on Tableview.
Whats wrong here friends??

P.S.: MdlProjektErstellung is a Widget in my QStackedWidget from Mainwindow.....