cahnged design drawer

improved map drawing tool

traque-front/hook/mapDrawing.jsx

@@ -0,0 +1,37 @@
+import { useEffect, useState } from "react";
+import { useLocation } from "./useLocation";
+
+export function useMapCircleDraw(area, setArea) {
+    const [drawing, setDrawing] = useState(false);
+    const [center, setCenter] = useState(area?.center || null);
+    const [radius, setRadius] = useState(area?.radius || null);
+
+    useEffect(() => {
+        setDrawing(false);
+        setCenter(area?.center || null);
+        setRadius(area?.radius || null);
+    }, [area])
+
+    function handleClick(e) {
+        if(!drawing) {
+            setCenter(e.latlng);
+            setRadius(null);
+            setDrawing(true);
+        } else {
+            setDrawing(false);
+            setArea({center, radius});
+        }
+    }
+
+    function handleMouseMove(e) {
+        if(drawing) {
+            setRadius(e.latlng.distanceTo(center));
+        }
+    }
+    return {
+        handleClick,
+        handleMouseMove,
+        center,
+        radius,
+    }
+}