MyWidget.dart

//a statefull widget receive it values directly from the constructor,
//from doc : A widget that does not require mutable state.
class MyWidget extends StateFullWidget {
  
  //final == val (kotlin)
  //underscore _ means private in dart
  final _myText = "";

  //default constructor, braces {} means the arguments can be provided in any order
  //_myText = text means _myText is initialised with the `text` value automatically
  MyWidget({this.key, @required String text}) : _myText = text;

  @override
  Widget build(BuildContext context) { //BuildContext => represents the parent widget
      var imageUrl = "www.mywebsites.com/${_myText}";
      return GestureDetector( //add user interraction
          onTap: () { //lambdas without parameter, like kotlin
            print("tapped");
          },
          child: Row( //Row == Vertical LinearLayout
              children: [ 
                    //download then display an image
                    Image.network(imageUrl),
                    Text(_myText)
              ]
          )
      )
  }
}