如何将QSortFilterProxyModel的setFilterRegExp（）与filterAcceptsRow（）一起使用

Question

While implementing QSortFilterProxyModel (to be used with QTableView ) I have overridden the proxy's filterAcceptsRow() method by defining in it some custom logic (on how the items get filtered). Now it seems that overriding a proxy's "default" filterAcceptsRow() conflicts with a build-in proxy's functionality built around .setFilterRegExp()

mySearchField=QLineEdit()
QObject.connect(mySearchField, SIGNAL("textChanged(QString)"), myProxyModel.setFilterRegExp)

While typing into mySearchField I do see that the proxy's filterAcceptsRow() is being constantly called . But since I have overrode its filterAcceptsRow() method with a custom logic no filtering on a text typed into the lineedit happens.

Question: Is it possible to keep both functionality: a simplicity of using proxy's built-in .setFilterRegExp() with custom defined filterAcceptsRow() method?

Answer 1

In a QSortFilterProxyModel 's constructor a self.searchText variable is declared first:

class TaskProxyModel(QSortFilterProxyModel):
    def __init__(self):
        super(TaskProxyModel, self).__init__()
        self.searchText=None

Defining a proxy's setSearchText() custom setter to be linked to lineedit ( lineedit is used to enter a search keyword):

class MyProxyModel(QSortFilterProxyModel):
    def __init__(self):
        super(MyProxyModel, self).__init__()
        self.searchText=None

    def setSearchText(self, arg=None):
        self.searchText=arg
        self.reset()

Linking the lineedit to a proxy's setSearchText() setter-method:

myProxy=MyProxyModel()
lineEdit=QLineEdit()
lineEdit.textChanged.connect(myProxy.setSearchText)

At the beginning of proxy's filterAcceptsRow() checking if self.searchText is not None. If not then do some logic:

class MyProxyModel(QSortFilterProxyModel):
    def __init__(self):
        super(MyProxyModel, self).__init__()
        self.searchText=None

    def filterAcceptsRow(self, rowProc, parentProc):
        sourceModel=self.sourceModel()      
        indexProc=sourceModel.index(rowProc, 0, parentProc)
        node=sourceModel.data(indexProc, Qt.UserRole).toPyObject()

        if self.searchText:
            nodeName=node.getName()
            if nodeName and not str(self.searchText).lower() in nodeName.lower():
                return False