import sys

from PySide6 import QtGui, QtCore, QtWidgets

class TestWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(TestWindow, self).__init__()

        self.setWindowTitle("TestTreeView")        

    def setWidget(self, widget):
        self.setCentralWidget(widget)

class TestEditDelegate(QtWidgets.QStyledItemDelegate):
    def __init__(self) -> None:
        super().__init__()

        self.padding = 3

    def createEditor(self, parent, option, index):
        lineEdit = QtWidgets.QLineEdit(parent)
        return lineEdit

    def sizeHint(self, option, index):
        size = super().sizeHint(option, index)
        return QtCore.QSize(size.width()+self.padding*2, size.height()+self.padding*2)

class TreeModelTest(QtGui.QStandardItemModel):
    def __init__(self) -> None:
        super().__init__()

class WidgetTest(QtWidgets.QTreeView):
    def __init__(self):
        super().__init__()

        self._model = TreeModelTest()
        self._model.setColumnCount(2)

        self.setHeaderHidden(True)
        self.setModel(self._model)
        self.setUniformRowHeights(True)

        self.setItemDelegateForColumn(1, TestEditDelegate())
		
    def addItem(self, text):
        item = QtGui.QStandardItem()
        item.setFlags(item.flags() & ~(QtCore.Qt.ItemIsEditable))
        item.setData(text, QtCore.Qt.DisplayRole)
        self._model.appendRow(item)

        index = self._model.index(self._model.rowCount()-1, 1)        
        self.openPersistentEditor(index)

def loadStyleSheet(qssFile: str) -> str:
    qssData = None
    with open(qssFile, mode="rt", encoding="utf-8") as f:
        qssData = f.read()
    return qssData

if (__name__ == "__main__"):
    app = QtWidgets.QApplication(sys.argv)
    app.setStyleSheet(loadStyleSheet("stylesheet.qss"))

    dialog = TestWindow()
    dialog.show()

    test = WidgetTest()    
    dialog.setWidget(test)

    for i in range(0, 10):
        test.addItem(f"TestItem_{i}")

    sys.exit(app.exec())