Add zoom mode functionality and refactor video feed hooks

- Implemented zoom mode in RegionSelector for digital zooming.
- Updated VideoFeedGridPainter to handle zoom interactions.
- Refactored useGetVideoFeed to support target detection and video feed queries based on mode.
- Enhanced useCreateVideoSnapshot to manage snapshots during zoom mode.

src/features/cameras/components/CameraSettings/RegionSelector.tsx

@@ -174,6 +174,27 @@ const RegionSelector = ({
               />
               <span className="text-xl">Erase mode</span>
             </label>
+            <label
+              htmlFor="zoomMode"
+              className={`p-4 border rounded-lg  mb-2
+            ${mode === "zoom" ? "border-gray-400 bg-[#202b36]" : "bg-[#253445] border-gray-700"}
+            hover:bg-[#202b36] hover:cursor-pointer`}
+            >
+              <input
+                id="zoomMode"
+                type="radio"
+                onChange={handleChange}
+                checked={mode === "zoom"}
+                value="zoom"
+                className="sr-only"
+              />
+              <div className="flex flex-col space-y-3">
+                <span className="text-xl">Enlarge image</span>
+                {mode === "zoom" && (
+                  <small className={`text-gray-400 italic`}>Use mouse to digitally zoom in and out</small>
+                )}
+              </div>
+            </label>
           </div>
         </div>
 

src/features/cameras/components/Video/VideoFeedGridPainter.tsx

@@ -23,6 +23,10 @@ const VideoFeedGridPainter = () => {
   const { latestBitmapRef, isloading } = useCreateVideoSnapshot();
   const [stageSize, setStageSize] = useState({ width: BACKEND_WIDTH, height: BACKEND_HEIGHT });
   const isDrawingRef = useRef(false);
+  const [scale, setScale] = useState(1);
+  const [position, setPosition] = useState({ x: 0, y: 0 });
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const stageRef = useRef<any>(null);
 
   const currentScale = stageSize.width / BACKEND_WIDTH;
   const size = BACKEND_CELL_SIZE * currentScale;
@@ -71,14 +75,14 @@ const VideoFeedGridPainter = () => {
   };
 
   const handleStageMouseDown = (e: KonvaEventObject<MouseEvent>) => {
-    if (!regions[selectedRegionIndex]) return;
+    if (!regions[selectedRegionIndex] || mode === "zoom") return;
     isDrawingRef.current = true;
     const pos = e.target.getStage()?.getPointerPosition();
     if (pos) paintCell(pos.x, pos.y);
   };
 
   const handleStageMouseMove = (e: KonvaEventObject<MouseEvent>) => {
-    if (!isDrawingRef.current) return;
+    if (!isDrawingRef.current || mode === "zoom") return;
     if (!regions[selectedRegionIndex]) return;
     const pos = e.target.getStage()?.getPointerPosition();
     if (pos) paintCell(pos.x, pos.y);
@@ -88,6 +92,38 @@ const VideoFeedGridPainter = () => {
     isDrawingRef.current = false;
   };
 
+  const handleMouseEnter = () => {
+    if (mode !== "zoom") return;
+    setScale(2);
+  };
+  const handleMouseLeave = () => {
+    document.body.style.cursor = "default";
+    setScale(1);
+    setPosition({ x: 0, y: 0 });
+  };
+  const handleMouseMove = (e: KonvaEventObject<MouseEvent>) => {
+    if (scale === 1) return;
+
+    const stage = e.target.getStage();
+    if (!stage) return;
+
+    const pointerPosition = stage.getPointerPosition();
+    if (!pointerPosition) return;
+
+    const newX = stageSize.width / 2 - pointerPosition.x * scale;
+    const newY = stageSize.height / 2 - pointerPosition.y * scale;
+
+    const maxX = 0;
+    const minX = stageSize.width - stageSize.width * scale;
+    const maxY = 0;
+    const minY = stageSize.height - stageSize.height * scale;
+
+    setPosition({
+      x: Math.max(minX, Math.min(maxX, newX)),
+      y: Math.max(minY, Math.min(maxY, newY)),
+    });
+  };
+
   useEffect(() => {
     const handleResize = () => {
       const width = window.innerWidth;
@@ -112,25 +148,33 @@ const VideoFeedGridPainter = () => {
 
   if (image === null || isloading) return <span className="text-slate-500">Loading Video feed…</span>;
   return (
-    <div
+    <div>
-      className={`w-full md:row-span-3 md:col-span-3 ${mode === "painter" ? "hover:cursor-crosshair" : ""} ${
-        mode === "eraser" ? "hover:cursor-pointer" : ""
-      }`}
-    >
       <Stage
+        ref={stageRef}
         width={stageSize.width}
         height={stageSize.height}
         onMouseDown={handleStageMouseDown}
         onMouseMove={handleStageMouseMove}
         onMouseUp={handleStageMouseUp}
         onMouseLeave={handleStageMouseUp}
-        className="max-w-[55%]"
+        className={`max-w-[55%] md:row-span-3 md:col-span-3 ${mode === "painter" ? "hover:cursor-crosshair" : ""} ${
+          mode === "eraser" ? "hover:cursor-pointer" : ""
+        }`}
+      >
+        <Layer
+          scaleX={scale}
+          scaleY={scale}
+          onMouseEnter={handleMouseEnter}
+          onMouseLeave={handleMouseLeave}
+          onMouseMove={handleMouseMove}
+          x={position.x}
+          y={position.y}
         >
-        <Layer>
           <Image image={image} width={stageSize.width} height={stageSize.height} classname={"rounded-lg"} />
         </Layer>
 
         <Layer ref={paintLayerRef} opacity={0.6}>
+          {mode === "painter" || mode === "eraser" ? (
             <Shape
               sceneFunc={(ctx, shape) => {
                 const cells = paintedCells;
@@ -154,6 +198,7 @@ const VideoFeedGridPainter = () => {
               width={stageSize.width}
               height={stageSize.height}
             />
+          ) : null}
         </Layer>
       </Stage>
     </div>

src/features/cameras/hooks/useGetVideoFeed.ts

@@ -1,7 +1,7 @@
 import { useQuery } from "@tanstack/react-query";
 import { CAMBASE } from "../../../utils/config";
 
-const getfeed = async (cameraFeedID: "A" | "B" | "C" | null) => {
+const targetDectionFeed = async (cameraFeedID: "A" | "B" | "C" | null) => {
   const response = await fetch(`${CAMBASE}/TargetDetectionColour${cameraFeedID}-preview`, {
     signal: AbortSignal.timeout(300000),
     cache: "no-store",
@@ -12,12 +12,31 @@ const getfeed = async (cameraFeedID: "A" | "B" | "C" | null) => {
   return response.blob();
 };
 
-export const useGetVideoFeed = (cameraFeedID: "A" | "B" | "C" | null) => {
+const getVideoFeed = async (cameraFeedID: "A" | "B" | "C" | null) => {
-  const videoQuery = useQuery({
+  const response = await fetch(`${CAMBASE}/Camera${cameraFeedID}-preview`, {
+    signal: AbortSignal.timeout(300000),
+    cache: "no-store",
+  });
+  if (!response.ok) {
+    throw new Error(`Cannot reach endpoint (${response.status})`);
+  }
+  return response.blob();
+};
+
+export const useGetVideoFeed = (cameraFeedID: "A" | "B" | "C" | null, mode: string) => {
+  const targetDetectionQuery = useQuery({
     queryKey: ["getfeed", cameraFeedID],
-    queryFn: () => getfeed(cameraFeedID),
+    queryFn: () => targetDectionFeed(cameraFeedID),
     refetchInterval: 500,
+    enabled: mode !== "zoom",
   });
 
-  return { videoQuery };
+  const videoFeedQuery = useQuery({
+    queryKey: ["videoQuery", cameraFeedID, mode],
+    queryFn: () => getVideoFeed(cameraFeedID),
+    refetchInterval: 500,
+    enabled: mode === "zoom",
+  });
+
+  return { targetDetectionQuery, videoFeedQuery };
 };

src/features/cameras/hooks/useGetvideoSnapshots.ts

@@ -5,11 +5,19 @@ import { useCameraFeedContext } from "../../../app/context/CameraFeedContext";
 export const useCreateVideoSnapshot = () => {
   const { state } = useCameraFeedContext();
   const cameraFeedID = state?.cameraFeedID;
+  const mode = state.modeByCamera[cameraFeedID];
   const latestBitmapRef = useRef<ImageBitmap | null>(null);
-  const { videoQuery } = useGetVideoFeed(cameraFeedID);
+  const { targetDetectionQuery, videoFeedQuery } = useGetVideoFeed(cameraFeedID, mode);
 
-  const snapShot = videoQuery?.data;
+  let snapShot = targetDetectionQuery?.data;
-  const isloading = videoQuery.isPending;
+  const isloading = targetDetectionQuery.isPending;
+
+  const videoSnapShot = videoFeedQuery?.data;
+  const isVideoLoading = videoFeedQuery.isPending;
+
+  if (isVideoLoading === false && videoSnapShot && mode === "zoom") {
+    snapShot = videoSnapShot;
+  }
 
   useEffect(() => {
     async function createBitmap() {