how to get the argument value of a draggable in flutter dart? - flutter

Question

I have some draggable pictures and 3 different drag targets. With each picture I have passed a position argument which stores whether the picture should be in first dragtarget or second or third. How can i access that position whenever a picture is droped on the target what is the position. is that the correct target. Thankyou.
// ignore_for_file: prefer_const_constructors, file_names, non_constant_identifier_names
import 'dart:async';
import 'package:dyslexia/pages/level2/round3/Q2spell.dart';
import 'package:dyslexia/utilities/nextButton.dart';
import 'package:flutter/material.dart';
import 'package:flutter_tts/flutter_tts.dart';
import '../../../utilities/QuestionWidget.dart';
class Q1MTP extends StatefulWidget {
const Q1MTP({Key? key}) : super(key: key);
#override
State<Q1MTP> createState() => _Q1MTPState();
}
class _Q1MTPState extends State<Q1MTP> {
String question = "Match the Picture with correct sentence?";
var changeButton = false;
var score = 0;
final FlutterTts flutterTts = FlutterTts();
// ignore: recursive_getters
speak(word) async {
await flutterTts.setLanguage("en-US");
await flutterTts.setPitch(1);
await flutterTts.setVolume(10.0);
await flutterTts.speak(word);
}
var letter = "A";
bool isPlayingMsg = false;
bool draged1 = false;
bool draged2 = false;
bool draged3 = false;
bool color = false;
bool correct = false;
var sentence1 = "The cat is on the mat";
var sentence2 = "The car is driving on the road";
var sentence3 = "The cat is running after the mouse";
double timer = 20.0;
bool canceltimer = false;
String showtimer = "30";
int pos1 = 1;
int pos2 = 2;
int pos3 = 3;
void starttimer() async {
const onesec = Duration(seconds: 1);
Timer.periodic(onesec, (Timer t) {
if (mounted) {
setState(() {
if (timer < 1) {
t.cancel();
//Navigator.of(context).pushReplacement(
// MaterialPageRoute(builder: (context) => Q11sound()));
} else if (canceltimer == true) {
t.cancel();
} else {
timer = timer - 1;
}
showtimer = timer.toString();
});
}
});
}
#override
void initState() {
starttimer();
super.initState();
}
// double line = ((timer.toDouble() - 1.0) / (20.0 - 1.0));
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
automaticallyImplyLeading: true,
backgroundColor: Colors.cyan,
title: Text("AD&DY"),
),
body: Padding(
padding: const EdgeInsets.all(14.0),
child: SingleChildScrollView(
child: Column(children: [
/*
LinearPercentIndicator(
width: MediaQuery.of(context).size.width - 60,
animation: true,
lineHeight: 20.0,
animationDuration: 2000,
percent: ((timer.toDouble() - 1.0) / (20.0 - 1.0)),
center: Text(timer.toString()),
trailing: Icon(Icons.timer),
linearStrokeCap: LinearStrokeCap.roundAll,
progressColor: Colors.greenAccent,
),
*/
SizedBox(height: MediaQuery.of(context).size.height * 0.02),
QuestionWidget(question: question),
SizedBox(height: MediaQuery.of(context).size.height * 0.05),
Divider(
thickness: 1.0,
),
SizedBox(height: MediaQuery.of(context).size.height * 0.05),
Column(
children: [
Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topRight,
end: Alignment.bottomLeft,
colors: const [
Colors.cyan,
Colors.white,
],
)),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
draggablePic("assets/images/$sentence3.png", pos3),
draggablePic("assets/images/$sentence1.jpg", pos1),
draggablePic("assets/images/$sentence2.jpg", pos2),
],
),
),
SizedBox(height: MediaQuery.of(context).size.height * 0.05),
Wrap(
spacing: 10,
runSpacing: 15,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
option(sentence1),
DragTarget<Image>(
builder: (
BuildContext context,
List<dynamic> accepted,
List<dynamic> rejected,
) {
return Material(
borderRadius: BorderRadius.circular(80),
child: Container(
height: 50,
width: 50,
color: Color.fromARGB(255, 255, 255, 255),
child: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topRight,
end: Alignment.bottomLeft,
colors: const [
Colors.white,
Colors.cyan,
],
)),
)),
);
},
onAccept: (dragW) {
setState(() {
draged1 = true;
});
},
),
]),
Divider(
thickness: 3,
indent: 50,
endIndent: 50,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
option(sentence2),
DragTarget<Image>(
builder: (
BuildContext context,
List<dynamic> accepted,
List<dynamic> rejected,
) {
return Material(
borderRadius: BorderRadius.circular(80),
child: Container(
height: 50,
width: 50,
color: Color.fromARGB(255, 255, 255, 255),
child: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topRight,
end: Alignment.bottomLeft,
colors: const [
Colors.white,
Colors.cyan,
],
)),
)),
);
},
onAccept: (dragW) {
setState(() {});
},
),
]),
Divider(
thickness: 3,
indent: 50,
endIndent: 50,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
option(sentence3),
DragTarget<Image>(
builder: (
BuildContext context,
List<dynamic> accepted,
List<dynamic> rejected,
) {
return Material(
borderRadius: BorderRadius.circular(80),
child: Container(
height: 50,
width: 50,
color: Color.fromARGB(255, 255, 255, 255),
child: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topRight,
end: Alignment.bottomLeft,
colors: const [
Colors.white,
Colors.cyan,
],
)),
)),
);
},
onAccept: (dragW) {
setState(() {});
},
),
]),
Divider(
thickness: 3,
indent: 50,
endIndent: 50,
),
],
),
],
),
SizedBox(height: MediaQuery.of(context).size.height * 0.1),
nextButton(changeButton: changeButton, Location: Q2spell()),
]),
),
),
);
}
Widget option(sentence) {
return Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Material(
elevation: 3,
child: Container(
color: Color.fromARGB(255, 153, 209, 216),
height: MediaQuery.of(context).size.height * 0.07,
width: MediaQuery.of(context).size.width * 0.6,
child: Center(child: Text(sentence)),
),
)
],
);
}
Widget draggablePic(pic, position) {
return Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Draggable<Image>(
// Data is the value this Draggable stores.
//data: position,
feedback: Image(
image: AssetImage(pic),
height: 90,
width: 90,
),
childWhenDragging: Material(
borderRadius: BorderRadius.circular(10),
child: Container(
height: 50.0,
width: 70.0,
color: Color.fromARGB(255, 255, 255, 255),
),
),
// onDragEnd: changecolor(),
child: Image(
image: AssetImage(pic),
height: 80,
width: 80,
))
],
);
}
}