"Undefined name 'context'. Try correcting the name to one that is defined, or defining the name." Flutter - flutter

Question

This is a snippet of my widgets.dart file where I defined a widget called see_all_cards and its only purpose is to show an extended list of all cards that I was initially displaying. It should just redirect to Trending.dart. That's my main goal here.
Widget see_all_cards(){
return Container(
child: FlatButton(
child: Text(
"See all (43)",
style: TextStyle(
color: Theme.of(context).accentColor, // error
),
),
onPressed: (){
Navigator.push(
context, // error
MaterialPageRoute(
builder: (BuildContext context){
return trending();
},
),
);
},
)
);
}
The following segment is my main page. I've called SlowlyApp from void main.
class SlowlyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'SlowlyApp',
home: Scaffold(
appBar: AppBar(
title: Text('Search',
style: TextStyle(
color: Color.fromRGBO(0,0,0,1),
),
),
backgroundColor: Color.fromRGBO(225,225,0,1),
actions: <Widget>[
IconButton(
icon:
Icon(Icons.search),
onPressed: (){
showSearch(context: context, delegate: data_search());
}
),
],
),
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
smallgap(),
current_cards_heading(),
current_cards(),
see_all_cards(),
smallgap(),
],
),
),
);
}
}

Answer 1

see_all_cards should expect context as parameter. You only have context in your main widget's build method
Widget see_all_cards(BuildContext context){
return Container(
child: FlatButton(
child: Text(
"See all (43)",
style: TextStyle(
color: Theme.of(context).accentColor, // error
),
),
onPressed: (){
Navigator.push(
context, // error
MaterialPageRoute(
builder: (BuildContext context){
return trending();
},
),
);
},
)
);
}
And then you can call passing the context.
class SlowlyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'SlowlyApp',
home: Scaffold(
appBar: AppBar(
title: Text('Search',
style: TextStyle(
color: Color.fromRGBO(0,0,0,1),
),
),
backgroundColor: Color.fromRGBO(225,225,0,1),
actions: <Widget>[
IconButton(
icon:
Icon(Icons.search),
onPressed: (){
showSearch(context: context, delegate: data_search());
}
),
],
),
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
smallgap(),
current_cards_heading(),
current_cards(),
see_all_cards(context),
smallgap(),
],
),
),
);
}
}

Answer 2

I also get this error to solve this way
it's the main file container called my widgets _buildFoodItem define context with parameters
Container(
height: MediaQuery.of(context).size.height - 185.0,
decoration: const BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(75.0),
),
),
child: ListView(
primary: true,
padding: const EdgeInsets.only(left: 25.0, right: 20.0),
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 45.0),
child: Container(
height: MediaQuery.of(context).size.height - 300.0,
child: ListView(children: [
_buildFoodItem(context, 'assets/images/plate1.png',
'Slazmon bowl', '₹ 150:00'),
_buildFoodItem(context, 'assets/images/plate2.png',
'Spring bowl', '₹ 120:00'),
_buildFoodItem(context, 'assets/images/plate3.png',
'Chikz bowl', '₹ 100:00'),
_buildFoodItem(context, 'assets/images/plate4.png',
'Berry Bowl', '₹ 199:00'),
_buildFoodItem(context, 'assets/images/plate5.png',
'Greezy bowl', '₹ 170:00'),
]),
),
)
],
),
),
this is my widget _buildFoodItem check the context
Widget _buildFoodItem(
BuildContext context, String imgPath, String foodName, String price) {
return Padding(padding: const EdgeInsets.only(
top: 10.0, left: 10.0, right: 10.0),
child: InkWell(
onTap: () {
Navigator.push(
context,
(MaterialPageRoute(
builder: (context) => FoodDetailsPage(
heroTag: imgPath,
foodName: foodName,
foodPrice: price,
),
)));
},
))
}
)