Update to 2.0.0 tree from current Fremantle build

[opencv] / tests / swig_python / highgui / cvCreateTrackbar.py

diff --git a/tests/swig_python/highgui/cvCreateTrackbar.py b/tests/swig_python/highgui/cvCreateTrackbar.py
new file mode 100755 (executable)
index 0000000..579f1b3
--- /dev/null
+++ b/tests/swig_python/highgui/cvCreateTrackbar.py
@@ -0,0 +1,95 @@
+#! /usr/bin/env python
+"""
+This script will test highgui's trackbar functionality
+"""
+
+# name if this test and it's requirements
+TESTNAME = "cvCreateTrackbar"
+REQUIRED = ["cvShowImage"]
+
+# needed for sys.exit(int) and .works file handling
+import os
+import sys
+import works
+
+# check requirements and delete old flag file, if it exists
+if not works.check_files(REQUIRED,TESTNAME):
+       sys.exit(77)
+
+# import the necessary things for OpenCV
+from highgui import *
+from cv import *
+
+# some definitions
+win_name = "testing..."
+bar_name = "brightness"
+bar_count= 100
+
+
+# position of imagefiles we need
+PREFIX=os.path.join(os.environ["srcdir"],"../../opencv_extra/testdata/python/images/")
+
+# 'moved' indicates if trackbar has been moved
+moved = False
+
+# 'range' indicates if trackbar was outside range [0..bar_count]
+range = False
+
+
+# function to call on a trackbar event
+def trackcall( p ):
+       # Trackbar position must be in [0..bar_count]
+       if (p > bar_count or p < 0):
+               globals()["range"] = True
+
+       cvConvertScale( image, image2,float(p)/float(bar_count) )
+       cvShowImage( win_name, image2 );
+       globals()["moved"] = True
+
+
+# create output window
+cvNamedWindow(win_name,CV_WINDOW_AUTOSIZE)
+image  = cvLoadImage(PREFIX+"cvCreateTrackbar.jpg")
+image2 = cvLoadImage(PREFIX+"cvCreateTrackbar.jpg")
+cvShowImage(win_name,image)
+
+# create the trackbar and save return value
+res = cvCreateTrackbar( bar_name, win_name, 0, bar_count, trackcall )
+
+# check return value
+if res == 0:
+       # something went wrong, so return an error code
+       print "(ERROR) Couldn't create trackbar."
+       sys.exit(1)
+       
+# init. window with image
+trackcall(bar_count/2)
+# reset 'moved' indicator
+moved = False
+
+# now give the user 20 seconds to do some input
+print "(INFO) Please move trackbar within the next 20 SECONDS to 'PASS' this test."
+print "(HINT) You can complete this test prematurely by pressing any key."
+print "(INFO) In the case of no user input, the test will be remarked as 'FAIL'."
+
+key = cvWaitKey(20000)
+
+if range:
+       # trackbar position value was outside allowed range [0..bar_count]
+       print "(ERROR) Trackbar position was outside range."
+       sys.exit(1)
+
+if not moved and (key==-1):
+       # trackbar has not been moved
+       print "(ERROR) No user input detected."
+       sys.exit(1)
+elif not moved and (key>0):
+       # 20sec. passed, trackbar has been moved
+       print "(INFO) No trackbar movement detected (but key pressed)."
+       sys.exit(77)
+
+# create flag file for following tests
+works.set_file(TESTNAME)
+
+# return 0 ('PASS')
+sys.exit(0)