25-7-28-2

flutter_overlay_apps-main/lib/flutter_overlay_apps.dart

@@ -0,0 +1,84 @@
+import 'dart:async';
+
+import 'package:flutter/services.dart';
+
+const int overlaySizeFill = -1;
+const String _mainAppMethodChannel = "com.phan_tech./flutter_overlay_apps";
+const String _overlayAppMethodChannel =
+    "com.phan_tech/flutter_overlay_apps/overlay";
+const String _overlayAppMessageChannel =
+    "com.phan_tech/flutter_overlay_apps/overlay/messenger";
+
+class FlutterOverlayApps {
+  static const MethodChannel _channel = MethodChannel(_mainAppMethodChannel);
+
+  // overlay methodChanel
+  static const MethodChannel _overlayChannel =
+      MethodChannel(_overlayAppMethodChannel);
+  //Overlay BasicMessageChannel
+  static const BasicMessageChannel _overlayMessageChannel =
+      BasicMessageChannel(_overlayAppMessageChannel, JSONMessageCodec());
+
+  /// Open overLay content
+  /// Takes optional;
+  ///   - int [height] default is [overlaySizeFill]
+  ///   - int [width] default is [overlaySizeFill]
+  ///   - OverlayAlignment [width] default is [alignment] [OverlayAlignment.center]
+  ///   - bool [closeOnBackButton] default is `true`
+  static Future<bool?> showOverlay(
+      {int height = overlaySizeFill,
+      int width = overlaySizeFill,
+      bool closeOnBackButton = true,
+      OverlayAlignment alignment = OverlayAlignment.center}) async {
+    final bool? _res = await _channel.invokeMethod('showOverlay', {
+      "height": height,
+      "width": width,
+      "alignment": alignment.name,
+      "closeOnBackButton": closeOnBackButton
+    });
+    return _res;
+  }
+
+  /// Closes overlau if open
+  static Future<bool?> closeOverlay() async {
+    final bool? _res = await _overlayChannel.invokeMethod('close');
+    return _res;
+  }
+
+  /// broadcast data to and from overlay app
+  /// the supported data type are;
+  ///   - [int], [double], [bool], [String], null
+  ///   - [List] of supported types
+  ///   - [Map] of supported types
+  static Future sendDataToAndFromOverlay(dynamic data) async {
+    return await _overlayMessageChannel.send(data);
+  }
+
+  /// Streams message shared between overlay and main app
+  static final StreamController _controller = StreamController();
+  static StreamController overlayListener() {
+    _overlayMessageChannel.setMessageHandler((message) async {
+      _controller.add(message);
+      return message;
+    });
+    return _controller;
+  }
+
+  /// dispose overlay controller
+  static void disposeOverlayListener() {
+    _controller.close();
+  }
+}
+
+/// Overlay alignment on screen
+enum OverlayAlignment {
+  topLeft,
+  topCenter,
+  topRight,
+  centerLeft,
+  center,
+  centerRight,
+  bottomLeft,
+  bottomCenter,
+  bottomRight
+}