Update documentation ( tutorials )

samples/cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp

@@ -21,6 +21,7 @@ Mat src1;
 Mat src2;
 Mat dst;
 
+//![on_trackbar]
 /**
  * @function on_trackbar
  * @brief Callback for trackbar
@@ -35,7 +36,7 @@ static void on_trackbar( int, void* )
 
    imshow( "Linear Blend", dst );
 }
-
+//![on_trackbar]
 
 /**
  * @function main
@@ -43,9 +44,11 @@ static void on_trackbar( int, void* )
  */
 int main( void )
 {
-   /// Read image ( same size, same type )
+   //![load]
+   /// Read images ( both have to be of the same size and type )
    src1 = imread("../data/LinuxLogo.jpg");
    src2 = imread("../data/WindowsLogo.jpg");
+   //![load]
 
    if( src1.empty() ) { printf("Error loading src1 \n"); return -1; }
    if( src2.empty() ) { printf("Error loading src2 \n"); return -1; }
@@ -53,13 +56,15 @@ int main( void )
    /// Initialize values
    alpha_slider = 0;
 
-   /// Create Windows
-   namedWindow("Linear Blend", 1);
+   //![window]
+   namedWindow("Linear Blend", WINDOW_AUTOSIZE); // Create Window
+   //![window]
 
-   /// Create Trackbars
+   //![create_trackbar]
    char TrackbarName[50];
    sprintf( TrackbarName, "Alpha x %d", alpha_slider_max );
    createTrackbar( TrackbarName, "Linear Blend", &alpha_slider, alpha_slider_max, on_trackbar );
+   //![create_trackbar]
 
    /// Show some stuff
    on_trackbar( alpha_slider, 0 );