refresh

flutter_hbb/lib/model.dart

@@ -163,6 +163,7 @@ class FfiModel with ChangeNotifier {
     _display.width = int.parse(evt['width']);
     _display.height = int.parse(evt['height']);
     FFI.cursorModel.updateDisplayOrigin(_display.x, _display.y);
+    FFI.canvasModel.resetOffset();
     notifyListeners();
   }
 
@@ -252,6 +253,12 @@ class CanvasModel with ChangeNotifier {
     notifyListeners();
   }
 
+  void resetOffset() {
+    _x = 0;
+    _y = 0;
+    notifyListeners();
+  }
+
   void panY(double dy) {
     _y += dy;
     notifyListeners();