Source code for formhtr.libs.extract_ROI.cli_inputs

import cv2




def process_cli(widget):
    """Dispatch keyboard commands for ``SelectROIsWidget``.

    Args:
        widget: Instance with ``undo_add_rectangle``.

    Returns:
        ``None`` when the user presses ``q`` or Esc.
    """
    exit = False
    while not exit:
        key = cv2.waitKey(0)
        # Close program with 'q' or 'Esc' button
        if key == ord('q') or key == 27:
            exit = True
        # Delete last rectangle with 'd'
        if key == ord('r'):
            widget.undo_add_rectangle()