def pop_up(self, text='', move=True):
        """
        Shows the dialog, setting the current text to `text`, and blocks the caller until the user has made a choice.
        If the user entered a label, that label is returned, otherwise (i.e. if the user cancelled the action)
        `None` is returned.
        """
        self.edit.setText(text)
        self.edit.setSelection(0, len(text))
        self.edit.setFocus(Qt.PopupFocusReason)
        if move:
            cursor_pos = QCursor.pos()

            # move OK button below cursor
            btn = self.button_box.buttons()[0]
            self.adjustSize()
            btn.adjustSize()
            offset = btn.mapToGlobal(btn.pos()) - self.pos()
            offset += QPoint(btn.size().width() // 4, btn.size().height() // 2)
            cursor_pos.setX(max(0, cursor_pos.x() - offset.x()))
            cursor_pos.setY(max(0, cursor_pos.y() - offset.y()))

            parent_bottom_right = self.parentWidget().geometry()
            max_x = parent_bottom_right.x() + parent_bottom_right.width() - self.sizeHint().width()
            max_y = parent_bottom_right.y() + parent_bottom_right.height() - self.sizeHint().height()
            max_global = self.parentWidget().mapToGlobal(QPoint(max_x, max_y))
            if cursor_pos.x() > max_global.x():
                cursor_pos.setX(max_global.x())
            if cursor_pos.y() > max_global.y():
                cursor_pos.setY(max_global.y())
            self.move(cursor_pos)
        return trimmed(self.edit.text()) if self.exec_() else None

        Shows the dialog, setting the current text to `text`, and blocks the caller until the user has made a choice.
        If the user entered a label, that label is returned, otherwise (i.e. if the user cancelled the action)
        `None` is returned.
        
libs/labelDialog.py