'Setup Run Configuration dialog with filename *fname*'

def setup(self, fname):

    combo_label = QLabel(_('Select    a    run    configuration:'))
    self.combo = QComboBox()
    self.combo.setMaxVisibleItems(20)
    self.combo.setSizeAdjustPolicy(QComboBox.AdjustToMinimumContentsLength)
    self.combo.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
    self.stack = QStackedWidget()
    configurations = _get_run_configurations()
    for (index, (filename, options)) in enumerate(configurations):
        if (fname == filename):
            break
    else:
        configurations.insert(0, (fname, RunConfiguration(fname).get()))
        index = 0
    for (filename, options) in configurations:
        widget = RunConfigOptions(self)
        widget.set(options)
        self.combo.addItem(filename)
        self.stack.addWidget(widget)
    self.combo.currentIndexChanged.connect(self.stack.setCurrentIndex)
    self.combo.setCurrentIndex(index)
    self.add_widgets(combo_label, self.combo, 10, self.stack)
    self.add_button_box((QDialogButtonBox.Ok | QDialogButtonBox.Cancel))
    self.setWindowTitle(_('Run    configuration    per    file'))
