easy functions for ROIs

[kmader]

• set/get bounding box
• polygons

[kmader]

freehand (polygons)

• get

freehand_shapes = cs_view.cur_image_view.get_tool_state().\
    get('imageIdToolState', {}).\
    get('', {}).\
    get('freehand', {}).\
    get('data', [])

setters are much more difficult if the old state is to be preserved

old_state = cs_view.cur_image_view.get_tool_state()
new_state = old_state.copy()
new_state['imageIdToolState']['']['freehand']['data'] = new_shape
cs_view.cur_image_view.set_tool_state(new_state)

aggressive setters are easy

freehand_defaults = {'visible': True, 'active': False, 
                     'invalidated': False, 'canComplete': False,
                     'highlight': False}
test_pts = [{'x': x_coord, 'y': y_coord,
             'highlight': True, 'active': False} for x_coord, y_coord in
           zip(range(5),  range(5))]
new_state = {'elementToolState': {},
             'elementViewport': {},
             'imageIdToolState': {'': {'freehand': {'data': [
    dict(handles=test_pts, **freehand_defaults)]}}}}
cs_view.cur_image_view.set_tool_state(new_state)