add OpenCV camera test

docs/TkEasyGUI/version-py.md

@@ -1,6 +1,6 @@
 # Module TkEasyGUI.version
 
-# TkEasyGUI version 0.2.67
+# TkEasyGUI version 0.2.68
 
 - audo generated by [pyproject.toml](https://github.com/kujirahand/tkeasygui-python/blob/main/pyproject.toml)
 

tests/opencv_camera.py

@@ -0,0 +1,35 @@
+"""
+OpenCV Camera Test
+Please install OpenCV
+```
+pip install opencv-python
+pip install opencv-contrib-python
+```
+"""
+
+import cv2 as cv
+import TkEasyGUI as sg
+# import PySimpleGUI as sg
+
+# camera
+vc = cv.VideoCapture(0)
+# layout
+layout = [
+    [sg.Button("Exit")],
+    [sg.Image(key="-image-", size=(400, 300))],
+]
+# event loop
+window = sg.Window("Camera Test", layout)
+while True:
+    event, values = window.read(timeout=1)
+    if event in (sg.WIN_CLOSED, "Exit"):
+        break
+    # capture
+    ret, frame = vc.read()
+    if ret:
+        frame = cv.resize(frame, (400, 300), fx=0, fy=0)
+        img = cv.imencode(".png", frame)[1].tobytes()
+        window["-image-"].update(img)
+
+vc.release()
+window.close()