refactor: split app wrapper from focused example code (multi-file apps)

Convert 17 multi-file apps to the validated pattern: lib/main.dart keeps only the MaterialApp bootstrap; a new lib/example.dart holds the full entry screen and focused example code, importing existing supporting files (screens/, tabs/, services/, models/, widgets/, utils/). Apps: analytics_integration, animation_example, biometrics, bottom_sheet, custom_home_drawer, google_signin, grid_layout, handling_routes, image_editor, scan_qr_code, statless_counter_app, using_bottom_nav_bar, using_custom_fonts, using_listview, using_listwheelscrollview, using_platform_adaptive, view_pdf_file
2026-08-25 01:05:36 +00:00 · 2026-08-18 00:48:50 +02:00
parent 780c0f1dbb
commit 6e3ff94bfe
34 changed files with 1002 additions and 766 deletions
--- a/view_pdf_file/lib/example.dart
+++ b/view_pdf_file/lib/example.dart
@@ -0,0 +1,84 @@
+// Example: View PDF file
+import 'package:flutter/material.dart';
+import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
+import 'package:view_pdf_file/constants.dart';
+import 'package:view_pdf_file/viewPDF.dart';
+
+class Example extends StatefulWidget {
+  const Example({super.key});
+
+  @override
+  ExampleState createState() => ExampleState();
+}
+
+class ExampleState extends State<Example> {
+  bool isLoading = false;
+  late Widget pdfViewer;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("View PDF File"),
+      ),
+      body: Container(
+        child: Center(
+          child: isLoading
+              ? CircularProgressIndicator()
+              : Column(
+                  crossAxisAlignment: CrossAxisAlignment.center,
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  mainAxisSize: MainAxisSize.max,
+                  children: [
+                    ElevatedButton(
+                      onPressed: () {
+                        loadFromAsset();
+                      },
+                      child: Text("Load local PDF"),
+                    ),
+                    ElevatedButton(
+                      onPressed: () {
+                        loadFromURL();
+                      },
+                      child: Text("Load PDF via URL"),
+                    ),
+                  ],
+                ),
+        ),
+      ),
+    );
+  }
+
+  Future<void> loadFromAsset() async {
+    setState(() {
+      isLoading = true;
+    });
+    pdfViewer = SfPdfViewer.asset('assets/Hello.pdf');
+    setState(() {
+      isLoading = false;
+    });
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (_) => ViewPDF(viewer: pdfViewer),
+      ),
+    );
+  }
+
+  Future<void> loadFromURL() async {
+    setState(() {
+      isLoading = true;
+    });
+
+    pdfViewer = SfPdfViewer.network(Constants.pdfURL);
+    setState(() {
+      isLoading = false;
+    });
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (_) => ViewPDF(viewer: pdfViewer),
+      ),
+    );
+  }
+}