Making all dependencies from highgui module optional

modules/contrib/src/chamfermatching.cpp

@@ -44,7 +44,10 @@
 //
 
 #include "precomp.hpp"
-#include "opencv2/highgui/highgui.hpp"
+#include "opencv2/opencv_modules.hpp"
+#ifdef HAVE_OPENCV_HIGHGUI
+#  include "opencv2/highgui/highgui.hpp"
+#endif
 #include <iostream>
 #include <queue>
 
@@ -907,13 +910,16 @@ void ChamferMatcher::Template::show() const
         }
     }
 
-
     circle(templ_color,Point(center.x + pad, center.y + pad),1,CV_RGB(0,255,0));
 
+#ifdef HAVE_OPENCV_HIGHGUI
     namedWindow("templ",1);
     imshow("templ",templ_color);
 
     cvWaitKey(0);
+#else
+    CV_Error(CV_StsNotImplemented, "OpenCV has been compiled without GUI support");
+#endif
 
     templ_color.release();
 }