I have added functionality of entering letters during runtime, they are displayed for you viewing pleasure. Additionally, I have began working making the item listed above be pubsub'd and there more useful to all of mankind

cv_pubsubs/webcam_pub/camctrl.py

@@ -1,4 +1,5 @@
 import pubsub
+
 if False:
     from typing import Union
 
@@ -12,5 +13,10 @@ class CamCtrl:
 
     @staticmethod
     def reset_vid(cam_id  # type: Union[int, str]
-                 ):
+                  ):
         pubsub.publish("cvcamhandlers." + str(cam_id) + ".cmd", 'r')
+
+    @staticmethod
+    def key_stroke(key_entered):
+        pubsub.publish("cvKeyStroke.", key_entered)
+

cv_pubsubs/window_sub/cv_window_sub.py

@@ -1,11 +1,24 @@
 import cv2
 from ..webcam_pub.camctrl import CamCtrl
 
+
 if False:
     from typing import List
 
 frame_dict = {}
 
+def triangle_seen():
+    print("a triangle was seen")
+def square_seen():
+    print("a square was seen")
+def nothing_seen():
+    print("nothing was seen")
+
+command_dict = {
+    "t": triangle_seen,
+    "s": square_seen,
+    " ": nothing_seen
+}
 
 # todo: figure out how to get the red x button to work. Try: https://stackoverflow.com/a/37881722/782170
 def sub_win_loop(
@@ -25,11 +38,27 @@ def sub_win_loop(
                     frames = frame_dict[input_vid_global_names[i]]
                 for f in range(len(frames)):
                     cv2.imshow(names[f % len(names)]+" (press q to quit)", frames[f])
+                    if cv2.getWindowProperty(names[f % len(names)]+" (press q to quit)", 0) != 0:
+                        print("X was pressed")
+                        for name in names:
+                            cv2.destroyWindow(name)
+                        for c in input_cams:
+                            CamCtrl.stop_cam(c)
 
-            if cv2.waitKey(1) & 0xFF == ord('q'):
+
+            key_criteria = cv2.waitKey(1) & 0xFF
+
+            if key_criteria == ord("q"):
                 for name in names:
                     cv2.destroyWindow(name)
                 for c in input_cams:
                     CamCtrl.stop_cam(c)
                 return
 
+            if chr(key_criteria) in command_dict:
+                command_dict[chr(key_criteria)]()
+                CamCtrl.key_stroke(chr(key_criteria))
+            elif chr(key_criteria) != "ÿ":
+                print(chr(key_criteria))
+
+

tests_interactive/test_sub_win.py

@@ -2,6 +2,15 @@ import unittest as ut
 import cv_pubsubs.webcam_pub as w
 from cv_pubsubs.window_sub import frame_dict, sub_win_loop
 
+def subscribe_to_key_command(cam_id,  # type: Union[int, str]
+                         frame_handler,  # type: Callable[[int, np.ndarray], Any]
+                         request_size=(1280, 720),  # type: Tuple[int, int]
+                         high_speed=False,  # type: bool
+                         fps_limit=240  # type: float
+                         ):  # type: (...) -> threading.Thread
+    t = threading.Thread(target=frame_handler_loop, args=(cam_id, frame_handler, request_size, high_speed, fps_limit))
+    t.start()
+    return t
 
 class TestSubWin(ut.TestCase):
 

testt.py

@@ -0,0 +1,8 @@
+def hi():
+    print("hi")
+
+if __name__ == '__main__':
+    dic = {}
+    dic['a'] = hi
+
+    dic['a']()