Initial commit: imajViewer Flutter Linux image viewer

lib/services/file_handler.dart

@@ -0,0 +1,28 @@
+import 'package:file_picker/file_picker.dart';
+import 'image_manager.dart';
+
+class FileHandler {
+  /// Open file picker dialog and load images
+  static Future<void> openFileDialog() async {
+    final result = await FilePicker.platform.pickFiles(
+      type: FileType.custom,
+      allowedExtensions: ['png', 'jpg', 'jpeg', 'webp', 'bmp', 'gif'],
+      allowMultiple: true,
+    );
+
+    if (result != null && result.files.isNotEmpty) {
+      final paths = result.files
+          .where((f) => f.path != null)
+          .map((f) => f.path!)
+          .toList();
+      ImageManager.instance.addImages(paths);
+    }
+  }
+
+  /// Load images from given file paths
+  static void loadImagesFromPaths(List<String> paths) {
+    if (paths.isNotEmpty) {
+      ImageManager.instance.addImages(paths);
+    }
+  }
+}