Using model with different views

[Wallabee19]

I've come up with a solution using a QIdentityProxyModel for the bottom view and just using the main model for the top view. I connect the currentRowChanged() signal from the top views selection model to a slot that simply does the following:

def updateProxyModel(current, previous)
    ProxyModel.beginResetModel()
    ProxyModel.selectedRow = current.row()
    ProxyModel.endResetModel()

def updateProxyModel(current, previous)
    ProxyModel.beginResetModel()
    ProxyModel.selectedRow = current.row()
    ProxyModel.endResetModel()

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I did have to reimplement index() as the base implementation of QAbstractTableModel calls hasIndex() which checks the rowCount() and columnCount() of only the main model, and would never generate indexes above 2 columns for the proxy model. But this was ok, because I like to use internalPointer() anyway to save on a little bit of typing in the data() methods

Main model:

class MainModel(QAbstractTableModel):
    def __init__(self, data, parent=None):
        super(MainModel, self).__init__(parent)
        self.headers = ('Name', 'Value')
        self.data = data
 
    def columnCount(self, parent=QModelIndex()):
        return len(self.headers)
 
    def rowCount(self, parent=QModelIndex()):
        return len(self.data)
 
    def index(self, row, col, parent=None):
        return self.createIndex(row, col, self.data[row])
 
    def flags(self, index):
        return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemNeverHasChildren
 
    def headerData(self, column, orientation, role):
        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
            return self.headers[column]
 
    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid():
            return None
 
        rowData = index.internalPointer()
        col = index.column()
 
        if role == Qt.DisplayRole:
            if col == 0:
                return rowData.name
            if col == 1:
                return rowData.value
 
        return None

class MainModel(QAbstractTableModel):
    def __init__(self, data, parent=None):
        super(MainModel, self).__init__(parent)
        self.headers = ('Name', 'Value')
        self.data = data

    def columnCount(self, parent=QModelIndex()):
        return len(self.headers)

    def rowCount(self, parent=QModelIndex()):
        return len(self.data)

    def index(self, row, col, parent=None):
        return self.createIndex(row, col, self.data[row])

    def flags(self, index):
        return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemNeverHasChildren

    def headerData(self, column, orientation, role):
        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
            return self.headers[column]

    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid():
            return None

        rowData = index.internalPointer()
        col = index.column()

        if role == Qt.DisplayRole:
            if col == 0:
                return rowData.name
            if col == 1:
                return rowData.value

        return None

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Proxy Model:

class ProxyModel(QIdentityProxyModel):
    def __init__(self, data, parent=None):
        super(ProxyModel, self).__init__(parent)
        self.data = data
        self.headers = ('Attribute', 'Width', 'Height', 'Pos X', 'Pos Y')
        self.selectedRow = None
 
    def headerData(self, column, orientation, role=None):
        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
            return self.headers[column]
 
    def columnCount(self, parent=QModelIndex()):
        if parent.isValid():
            return 0
 
        return len(self.headers)
 
    def rowCount(self, parent=QModelIndex()):
        if parent.isValid() or not self.selectedRow:
            return 0
 
        return len(self.data[self.selectedRow].attributes)
 
    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid() or not self.selectedRow:
            return None
 
        col = index.column()
        row = index.row()
 
        if role == Qt.DisplayRole:
            return self.data[self.selectedRow].attributes[row][col]
 
        return None

class ProxyModel(QIdentityProxyModel):
    def __init__(self, data, parent=None):
        super(ProxyModel, self).__init__(parent)
        self.data = data
        self.headers = ('Attribute', 'Width', 'Height', 'Pos X', 'Pos Y')
        self.selectedRow = None

    def headerData(self, column, orientation, role=None):
        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
            return self.headers[column]

    def columnCount(self, parent=QModelIndex()):
        if parent.isValid():
            return 0

        return len(self.headers)

    def rowCount(self, parent=QModelIndex()):
        if parent.isValid() or not self.selectedRow:
            return 0

        return len(self.data[self.selectedRow].attributes)

    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid() or not self.selectedRow:
            return None

        col = index.column()
        row = index.row()

        if role == Qt.DisplayRole:
            return self.data[self.selectedRow].attributes[row][col]

        return None

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Decent solution? What could be done better or differently?