pdf rendering issue fix

lib/presentation/screens/staff/policy/policyPdf.dart

@@ -21,7 +21,6 @@ class PolicyPdfViewer extends StatefulWidget {
 
 class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
   Uint8List? _pdfBytes;
-  String? _loadedUrl;
 
   final TransformationController _transformController =
   TransformationController();
@@ -32,33 +31,41 @@ class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
 
   final ScrollController _scrollController = ScrollController();
 
-  Future<void> _loadPdf() async {
-    if (_pdfBytes != null && _loadedUrl == widget.pdfUrl) return;
-
-    final response = await http.get(Uri.parse(widget.pdfUrl!));
-    if (response.statusCode == 200) {
-      // setState(() {
-        _pdfBytes = response.bodyBytes;
-        _loadedUrl = widget.pdfUrl;
-      // });
-    }
+  @override
+  void initState() {
+    super.initState();
+    _loadPdf();
   }
 
-  void _applyTransform() {
-    _transformController.value = Matrix4.identity()..scale(_scale);
+  Future<void> _loadPdf() async {
+    if (widget.pdfUrl == null) return;
+
+    try {
+      final response = await http.get(Uri.parse(widget.pdfUrl!));
+
+      if (!mounted) return;
+
+      if (response.statusCode == 200) {
+        setState(() {
+          _pdfBytes = response.bodyBytes; // ✅ MUST use setState
+        });
+      }
+    } catch (e) {
+      debugPrint('PDF load error: $e');
+    }
   }
 
   void _zoomIn() {
     setState(() {
       _scale = (_scale + 0.2).clamp(_minScale, _maxScale);
-      _applyTransform();
+      _transformController.value = Matrix4.identity()..scale(_scale);
     });
   }
 
   void _zoomOut() {
     setState(() {
       _scale = (_scale - 0.2).clamp(_minScale, _maxScale);
-      _applyTransform();
+      _transformController.value = Matrix4.identity()..scale(_scale);
     });
   }
 
@@ -69,14 +76,6 @@ class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
     });
   }
 
-  @override
-  void initState() {
-    super.initState();
-    if (widget.pdfUrl != null) {
-      _loadPdf();
-    }
-  }
-
   @override
   Widget build(BuildContext context) {
     if (_pdfBytes == null) {
@@ -89,37 +88,36 @@ class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
       children: [
         InteractiveViewer(
           transformationController: _transformController,
-          panEnabled: isZoomed,          // 👈 ONLY pan when zoomed
-          scaleEnabled: false,           // zoom via buttons only
+          panEnabled: isZoomed,
+          scaleEnabled: false,
           boundaryMargin: const EdgeInsets.all(200),
           minScale: _minScale,
           maxScale: _maxScale,
-          child: SingleChildScrollView(
-            controller: _scrollController,
-            physics: isZoomed
-                ? const NeverScrollableScrollPhysics() // ❌ no scroll when zoomed
-                : const BouncingScrollPhysics(),       // ✅ normal scroll
-            child: PdfDocumentLoader.openData(
-              _pdfBytes!,
-              documentBuilder: (context, pdfDocument, pageCount) {
-                return Column(
-                  children: List.generate(
-                    pageCount,
-                        (index) => Padding(
-                      padding: const EdgeInsets.symmetric(vertical: 8),
-                      child: PdfPageView(
-                        pdfDocument: pdfDocument,
-                        pageNumber: index + 1,
-                      ),
+          child: PdfDocumentLoader.openData(
+            _pdfBytes!,
+            documentBuilder: (context, pdfDocument, pageCount) {
+              return ListView.builder(
+                controller: _scrollController,
+                physics: isZoomed
+                    ? const NeverScrollableScrollPhysics()
+                    : const BouncingScrollPhysics(),
+                itemCount: pageCount,
+                itemBuilder: (context, index) {
+                  return Padding(
+                    padding: const EdgeInsets.symmetric(vertical: 8),
+                    child: PdfPageView(
+                      pdfDocument: pdfDocument,
+                      pageNumber: index + 1,
+                      // renderQuality: PdfPageRenderQuality.medium, // ⚡ performance
                     ),
-                  ),
-                );
-              },
-            ),
+                  );
+                },
+              );
+            },
           ),
         ),
 
-        // ─────────── Zoom buttons ───────────
+        // ───────── Zoom Controls ─────────
         Positioned(
           right: 16,
           top: 16,
@@ -154,6 +152,7 @@ class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
   }
 }
 
+
 //scroll zoom code
 // import 'package:dropdown_search/dropdown_search.dart';
 // import 'package:flutter/gestures.dart';
@@ -336,4 +335,4 @@ class _PolicyPdfViewerState extends State<PolicyPdfViewer> {
 //       },
 //     );
 //   }
-// }
+// }