How To Sync Multiple Views Sharing Same Model

A left-side-list-view click populates a right-side-table-view with the corresponding to a clicked item items. The problem is that a right-side-table-view items list keeps growing w

Solution 1:

Now with single row. This row could be hidden when nothing has been selected yet - I just show it as empty.

classTableModel(QtCore.QAbstractTableModel):

    sel = Nonedef__init__(self):
        QtCore.QAbstractTableModel.__init__(self)
        self.items=[]    
    defrowCount(self, parent=QtCore.QModelIndex()):
        return1defcolumnCount(self, index=QtCore.QModelIndex()):
        return4defdata(self, index, role):
        ifnot index.isValid() ornot (0<=index.row()<len(self.items)): return 
        key=self.sel
        column=index.column()
        if role==QtCore.Qt.DisplayRole:
            ifnot column:  returnstr(key)
            else:
                return elements.get(key,{}).get(column) if (self.sel isnotNone) else QtCore.QVariant()

    defrebuildItems(self, index):
        key=index.data(QtCore.Qt.UserRole)
        ifnot key in self.items:
            self.items.append(key)
        self.sel = key
        self.dataChanged.emit(self.index(1,1), self.index(1,4) )

classWindow(QtGui.QWidget):
    def__init__(self):
        super(Window, self).__init__()
        mainLayout=QtGui.QHBoxLayout()
        self.setLayout(mainLayout) 
        self.dataModel=ListModel()
        self.dataModel.buildItems() 
        self.dataModelB=TableModel()
        self.viewA=QtGui.QListView()
        self.viewA.setModel(self.dataModel)
        self.viewA.clicked.connect(self.onClick) 
        self.viewB=QtGui.QTableView()         
        self.viewB.setModel(self.dataModelB)
        mainLayout.addWidget(self.viewA)
        mainLayout.addWidget(self.viewB)    
        self.show()
    defonClick(self, index):
        self.viewB.model().rebuildItems(index)

Solution 2:

This does what you asked, as far as not repeating insertions:

defrebuildItems(self, index):
    key=index.data(QtCore.Qt.UserRole)
    totalItems=self.rowCount()
    ifnot key inself.items:self.beginInsertRows(QtCore.QModelIndex(), totalItems, totalItems)
        self.items.append(key)
        self.endInsertRows()

However, for hiding items, that is something done by the view (or a proxy model), not the model itself.