calc_lat_long
A package to calculate distance between two cordinate points Latitude and Longitude by Miles or Nautical Miles or Kilometers.
Getting Started
- Add the latest version of package to your pubspec.yaml (and run
dart pub get);
depencencies:
calc_lat_long: ^1.0.12
Example
There are a number of properties that you can modify:
-
Latitude1
-
Longitude1
-
Latitude2
-
Longitude2
-
Enum UnitLength.km
mi, km, nm(miles, kilometers, nautical miles)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Padding(
padding: EdgeInsets.all(16),
child: ListView(
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
children: <Widget>[
TextField(
controller: latitude1,
decoration: InputDecoration(labelText: "Latitude 1"),
),
TextField(
controller: longitude1,
decoration: InputDecoration(labelText: "Longitude 1"),
),
TextField(
controller: latitude2,
decoration: InputDecoration(labelText: "Latitude 2"),
),
TextField(
controller: longitude2,
decoration: InputDecoration(labelText: "Longitude 2"),
),
DropdownButton<UnitLength>(
items: _unitLength.map((UnitLength dropDownStringItem) {
return DropdownMenuItem<UnitLength>(
value: dropDownStringItem,
child: Text(dropDownStringItem.toString()),
);
}).toList(),
onChanged: (UnitLength newUnitSelected) {
_dropDownItemSelected(newUnitSelected);
setState(() {
_selectedUnit = newUnitSelected;
});
},
value: _selectedUnit),
SizedBox(
height: 15,
),
ElevatedButton(
onPressed: () {
/// Here you must pass your coordinates following by Latitude 1, Latitude 2, Logintude 1, Longitude 2
var dist = CalcDistance.distance(
num.parse(latitude1.text),
num.parse(latitude2.text),
num.parse(longitude1.text),
num.parse(longitude2.text),
_selectedUnit);
setState(() {
distance = dist;
});
},
child: Text("Calculate")),
SizedBox(
height: 15,
),
Text(distance == 0 ? "" : "Distance: $distance")
],
),
)
);
}