Set QColumnView selection (and update the columns)

qt_qcolumnview_selection.py

import sys
import os
from Qt import QtWidgets, QtCore, QtGui


def main():

    app = QtWidgets.QApplication(sys.argv)

    path = r"C:\test\subfolder\file.txt"
    root_path = os.path.dirname(os.path.dirname(path))

    model = QtWidgets.QFileSystemModel()
    view = QtWidgets.QColumnView()
    view.setModel(model)

    # Set root
    model.setRootPath(root_path)
    root_index = model.index(root_path)
    view.setRootIndex(root_index)

    # Problem #1:
    # Setting the current index does set up the horizontal scrollbar (as if it works)
    # but it doesn't actually select anything nor do the columns show up on the right side
    index = model.index(path)
    assert index.isValid()
    view.setCurrentIndex(index)

    # Problem #2:
    # Setting the selection doesn't seem to do anything either.
    selection = view.selectionModel()
    selection.select(index, QtGui.QItemSelectionModel.Rows)

    view.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

This works for me as well.

import sys
from Qt import QtWidgets, QtCore


def main():

    app = QtWidgets.QApplication(sys.argv)

    model = QtWidgets.QFileSystemModel()
    view = QtWidgets.QColumnView()
    view.setModel(model)
    view.show()

    model.setRootPath(None)

    # Select *after* showing
    index = model.index("d:/")
    selection = view.selectionModel()
    print("Selecting '%s'" % index.data(QtCore.Qt.DisplayRole))
    selection.select(index, QtCore.QItemSelectionModel.Select)

    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

This works for me as well.

That one does work, yes. Are you able to get it to work when "highlighting" something in columns nested down? Basically expanding the columns op to that selection. Even with combinations of scroll to and alike I'm unable to get that to work.