Improve video scrolling to create a continuous, flowing experience

Refactors the `CategoryRow` component to implement smooth, continuous scrolling using `requestAnimationFrame` and `translateX` for a seamless video-to-video transition, replacing the previous interval-based circular carousel.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 2eb1084e-b728-4449-9231-f1665924c8d5
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/2eb1084e-b728-4449-9231-f1665924c8d5/QCN70f2

client/src/components/netflix-grid.tsx

@@ -137,35 +137,55 @@ function CategoryRow({ category, onVideoClick }: CategoryRowProps) {
   const [showLeftButton, setShowLeftButton] = useState(false);
   const [showRightButton, setShowRightButton] = useState(true);
   
-  const [currentIndex, setCurrentIndex] = useState(0);
+  const [translateX, setTranslateX] = useState(0);
+  const [isScrolling, setIsScrolling] = useState(false);
   const videosToShow = 5; // Show 5 videos at a time
+  const videoWidth = 120; // Width including spacing
 
   const scroll = (direction: 'left' | 'right') => {
-    const totalVideos = category.videos.length;
+    const step = direction === 'right' ? -videoWidth : videoWidth;
-    if (direction === 'right') {
+    setTranslateX(prev => prev + step);
-      // Move to next video in circular fashion: 1→2→3→...→10→1→2→...
-      setCurrentIndex(prev => (prev + 1) % totalVideos);
-    } else {
-      // Move to previous video in circular fashion: 1→10→9→...→2→1→10→...
-      setCurrentIndex(prev => prev === 0 ? totalVideos - 1 : prev - 1);
-    }
   };
 
   const startAutoScroll = (direction: 'left' | 'right') => {
-    // Clear any existing interval
+    // Clear any existing animation
     if (scrollIntervalRef.current) {
-      clearInterval(scrollIntervalRef.current);
+      cancelAnimationFrame(scrollIntervalRef.current);
     }
     
-    // Start continuous circular scrolling
+    setIsScrolling(true);
-    scrollIntervalRef.current = setInterval(() => {
+    
-      scroll(direction);
+    // Continuous smooth flow - videos flow like a stream
-    }, 600); // Auto scroll every 600ms
+    const speed = direction === 'right' ? -2 : 2; // Pixels per frame
+    
+    const animate = () => {
+      setTranslateX(prev => {
+        const newX = prev + speed;
+        const totalWidth = category.videos.length * videoWidth;
+        
+        // Infinite loop - seamless reset
+        if (direction === 'right' && newX <= -totalWidth * 2) {
+          return -totalWidth; // Reset to middle section
+        } else if (direction === 'left' && newX >= 0) {
+          return -totalWidth; // Reset to middle section
+        }
+        
+        return newX;
+      });
+      
+      if (isScrolling) {
+        scrollIntervalRef.current = requestAnimationFrame(animate);
+      }
+    };
+    
+    animate();
   };
 
-  // Always start with video 1 visible at first position
+  // Initialize in middle section for infinite scroll
   useEffect(() => {
-    setCurrentIndex(0); // Start with video 1 at first position
+    if (category.videos.length > 0) {
+      setTranslateX(-category.videos.length * videoWidth); // Start in middle section
+    }
   }, [category.videos.length]);
 
   // Always show both buttons
@@ -175,8 +195,9 @@ function CategoryRow({ category, onVideoClick }: CategoryRowProps) {
   }, []);
 
   const stopAutoScroll = () => {
+    setIsScrolling(false);
     if (scrollIntervalRef.current) {
-      clearInterval(scrollIntervalRef.current);
+      cancelAnimationFrame(scrollIntervalRef.current);
       scrollIntervalRef.current = null;
     }
   };
@@ -270,34 +291,42 @@ function CategoryRow({ category, onVideoClick }: CategoryRowProps) {
           <ChevronRight className="w-5 h-5 text-white" />
         </button>
 
-        {/* Circular carousel - videos rotate in circle */}
+        {/* Continuous flowing carousel - videos flow across entire width */}
-        <div className="flex space-x-2 md:space-x-3 pb-4 px-4 md:px-0">
+        <div className="overflow-hidden">
-          {/* Show 5 videos in circular fashion */}
+          <div 
-          {Array.from({ length: videosToShow }, (_, index) => {
+            className="flex space-x-2 md:space-x-3 pb-4 px-4 md:px-0"
-            const videoIndex = (currentIndex + index) % category.videos.length;
+            style={{
-            const video = category.videos[videoIndex];
+              transform: `translateX(${translateX}px)`,
-            return (
+              willChange: 'transform',
-              <div key={`${videoIndex}-${index}`} className="flex-shrink-0 w-28 md:w-52 relative group transition-all duration-300">
+              transition: isScrolling ? 'none' : 'transform 0.3s ease'
-                {/* Top 10 Number overlay for first category */}
+            }}
-                {category.title.includes("Top 10") && (
+          >
-                  <div className="absolute top-1 left-1 z-30 text-white font-black text-3xl md:text-5xl drop-shadow-2xl pointer-events-none"
+            {/* Triple the videos for seamless infinite flow */}
-                       style={{ 
+            {[...category.videos, ...category.videos, ...category.videos].map((video, index) => {
-                         textShadow: '4px 4px 8px rgba(0,0,0,0.8), -2px -2px 4px rgba(0,0,0,0.6)',
+              const actualIndex = index % category.videos.length;
-                         WebkitTextStroke: '2px rgba(0,0,0,0.8)',
+              return (
-                         transform: 'none',
+                <div key={`${video.id}-${Math.floor(index / category.videos.length)}-${actualIndex}`} className="flex-shrink-0 w-28 md:w-52 relative group">
-                         transition: 'none'
+                  {/* Top 10 Number overlay for first category */}
-                       }}>
+                  {category.title.includes("Top 10") && (
-                    {videoIndex + 1}
+                    <div className="absolute top-1 left-1 z-30 text-white font-black text-3xl md:text-5xl drop-shadow-2xl pointer-events-none"
-                  </div>
+                         style={{ 
-                )}
+                           textShadow: '4px 4px 8px rgba(0,0,0,0.8), -2px -2px 4px rgba(0,0,0,0.6)',
-                <VideoCard
+                           WebkitTextStroke: '2px rgba(0,0,0,0.8)',
-                  video={video}
+                           transform: 'none',
-                  onClick={onVideoClick}
+                           transition: 'none'
-                  className="w-full hover:scale-105 hover:z-10 transition-all duration-300 group-hover:shadow-xl rounded-md overflow-hidden"
+                         }}>
-                />
+                      {actualIndex + 1}
-              </div>
+                    </div>
-            );
+                  )}
-          })}
+                  <VideoCard
+                    video={video}
+                    onClick={onVideoClick}
+                    className="w-full hover:scale-105 hover:z-10 transition-all duration-300 group-hover:shadow-xl rounded-md overflow-hidden"
+                  />
+                </div>
+              );
+            })}
+          </div>
         </div>
       </div>
     </div>