Initial commit: imajViewer Flutter Linux image viewer

lib/widgets/custom_title_bar.dart

@@ -0,0 +1,78 @@
+import 'package:flutter/material.dart';
+import 'package:window_manager/window_manager.dart';
+
+class CustomTitleBar extends StatelessWidget {
+  const CustomTitleBar({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Positioned(
+      top: 0,
+      left: 0,
+      right: 0,
+      child: DragToMoveArea(
+        child: SizedBox(
+          height: 40,
+          child: Stack(
+            children: [
+              Positioned.fill(
+                child: Container(
+                  decoration: BoxDecoration(
+                    gradient: LinearGradient(
+                      begin: Alignment.topCenter,
+                      end: Alignment.bottomCenter,
+                      colors: [
+                        Colors.black.withValues(alpha: 0.6),
+                        Colors.black.withValues(alpha: 0.0),
+                      ],
+                    ),
+                  ),
+                ),
+              ),
+              Positioned(
+                right: 0,
+                top: 0,
+                bottom: 0,
+                child: Row(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    _BarButton(
+                      icon: Icons.horizontal_rule,
+                      onTap: () => windowManager.minimize(),
+                    ),
+                    _BarButton(
+                      icon: Icons.close,
+                      onTap: () => windowManager.close(),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _BarButton extends StatelessWidget {
+  final IconData icon;
+  final VoidCallback onTap;
+
+  const _BarButton({required this.icon, required this.onTap});
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      child: MouseRegion(
+        cursor: SystemMouseCursors.click,
+        child: SizedBox(
+          width: 44,
+          height: 40,
+          child: Icon(icon, color: Colors.white54, size: 18),
+        ),
+      ),
+    );
+  }
+}