From 520099b31dd2aebd5ef46b1a722b5ff414db1e6c Mon Sep 17 00:00:00 2001
From: Kar l5 <kar@siliconpin.com>
Date: Tue, 8 Jul 2025 13:51:52 +0530
Subject: [PATCH] 9g

---
 src/components/DrawingCanvas.js | 62 ++++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/components/DrawingCanvas.js b/src/components/DrawingCanvas.js
index 28c0027..b607ca5 100644
--- a/src/components/DrawingCanvas.js
+++ b/src/components/DrawingCanvas.js
@@ -34,6 +34,8 @@ const DrawingCanvas = () => {
   const [currentTool, setCurrentTool] = useState('pencil');
   const [color, setColor] = useState('#000000');
   const [thickness, setThickness] = useState(2);
+  const [selectedIndex, setSelectedIndex] = useState(null);
+  const [offset, setOffset] = useState({ x: 0, y: 0 });
   const fileInputRef = useRef(null);
 
   // Resize canvas on window resize
@@ -63,7 +65,24 @@ const DrawingCanvas = () => {
         ctx.putImageData(action.imageData, 0, 0);
       }
     });
-  }, [shapes, history]);
+
+    // After drawing all shapes
+    if (selectedIndex !== null && shapes[selectedIndex]) {
+      const ctx = canvasRef.current.getContext('2d');
+      const shape = shapes[selectedIndex];
+      ctx.save();
+      ctx.strokeStyle = 'red';
+      ctx.lineWidth = 2;
+      if (shape.type === 'rectangle' || shape.type === 'image') {
+        ctx.strokeRect(shape.x, shape.y, shape.width, shape.height);
+      } else if (shape.type === 'circle') {
+        ctx.beginPath();
+        ctx.arc(shape.x, shape.y, shape.radius, 0, Math.PI * 2);
+        ctx.stroke();
+      }
+      ctx.restore();
+    }
+  }, [shapes, history, selectedIndex]);
 
   useEffect(() => {
     redraw();
@@ -88,6 +107,32 @@ const DrawingCanvas = () => {
   const handlePointerDown = (e) => {
     e.preventDefault();
     const { x, y } = getPos(e);
+
+    if (currentTool === 'select') {
+      // Find the topmost shape under the pointer
+      for (let i = shapes.length - 1; i >= 0; i--) {
+        const shape = shapes[i];
+        if (
+          (shape.type === 'rectangle' &&
+            x >= shape.x && x <= shape.x + shape.width &&
+            y >= shape.y && y <= shape.y + shape.height) ||
+          (shape.type === 'circle' &&
+            Math.sqrt((x - shape.x) ** 2 + (y - shape.y) ** 2) <= shape.radius) ||
+          (shape.type === 'image' &&
+            x >= shape.x && x <= shape.x + shape.width &&
+            y >= shape.y && y <= shape.y + shape.height)
+        ) {
+          setSelectedIndex(i);
+          setOffset({ x: x - shape.x, y: y - shape.y });
+          setIsDrawing(true);
+          return;
+        }
+      }
+      setSelectedIndex(null);
+      setIsDrawing(false);
+      return;
+    }
+
     setIsDrawing(true);
 
     if (currentTool === 'pencil') {
@@ -120,6 +165,19 @@ const DrawingCanvas = () => {
     if (!isDrawing) return;
     const { x, y } = getPos(e);
 
+    if (currentTool === 'select' && selectedIndex !== null) {
+      setShapes(prev => {
+        const updated = [...prev];
+        const shape = { ...updated[selectedIndex] };
+        // Move shape based on offset
+        shape.x = x - offset.x;
+        shape.y = y - offset.y;
+        updated[selectedIndex] = shape;
+        return updated;
+      });
+      return;
+    }
+
     if (currentTool === 'pencil') {
       setShapes(prev => {
         if (prev.length === 0) return prev;
@@ -151,6 +209,7 @@ const DrawingCanvas = () => {
   const handlePointerUp = () => {
     setIsDrawing(false);
     setLastPosition(null);
+    setSelectedIndex(null);
     // Save a deep copy of shapes for undo/redo
     setHistory(prev => [...prev, deepCopyShapes(shapes)]);
     setUndoHistory([]);
@@ -232,6 +291,7 @@ const DrawingCanvas = () => {
         <button onClick={() => setCurrentTool('pencil')} className={`tool-button ${currentTool === 'pencil' ? 'active' : ''}`}>✏️</button>
         <button onClick={() => setCurrentTool('rectangle')} className={`tool-button ${currentTool === 'rectangle' ? 'active' : ''}`}>🟨</button>
         <button onClick={() => setCurrentTool('circle')} className={`tool-button ${currentTool === 'circle' ? 'active' : ''}`}>⭕</button>
+        <button onClick={() => setCurrentTool('select')} className={`tool-button ${currentTool === 'select' ? 'active' : ''}`}>🖱️</button>
         <button onClick={handleUndo} className="tool-button" disabled={history.length === 0}>↺</button>
         <button onClick={handleRedo} className="tool-button" disabled={undoHistory.length === 0}>↻</button>
         <button onClick={() => fileInputRef.current.click()} className="tool-button">🖼️ Insert Image</button>