flutter listview alphabet index
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How to get the finger movement event in flutter like 'recyclerview alphabet index in android' check the sample image.
I have created a Positioned alphabet index listview but I can't find the current index in DragUpdate.
var alphabet = ["#","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
new Positioned(
top: .0,
left: 1,
bottom: 10,
width: 55,
child: Material(
borderRadius: BorderRadius.circular(15.0),
elevation: 10.0,
child: ListView.builder(
itemCount: alphabet.length,
itemBuilder: (BuildContext context, int index) {
return new GestureDetector(
onVerticalDragUpdate:
(DragUpdateDetails detail) {
setState(() {
_barOffset += detail.delta.dy;
});
print("$detail");
print("Update ${alphabet[index]}");
},
onVerticalDragStart: (DragStartDetails detail) {
print("onVerticalDragStart");
print("Start ${alphabet[index]}");
},
onVerticalDragEnd: (DragEndDetails detail) {
print("onVerticalDragEnd");
print("End ${alphabet[index]}");
},
onTap: () => print(alphabet[index]),
child: new Container(
margin: EdgeInsets.only(
left: 20.0, right: 10.0, top: 6.5),
height: 15.0,
child: new Text('${alphabet[index]}'),
));
}),
),
listview
flutter alphabet asked Nov 22 at 14:13
Anish Manchappillil
1076
add a comment |
up vote
0
down vote
favorite
How to get the finger movement event in flutter like 'recyclerview alphabet index in android' check the sample image.
I have created a Positioned alphabet index listview but I can't find the current index in DragUpdate.
var alphabet = ["#","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
new Positioned(
top: .0,
left: 1,
bottom: 10,
width: 55,
child: Material(
borderRadius: BorderRadius.circular(15.0),
elevation: 10.0,
child: ListView.builder(
itemCount: alphabet.length,
itemBuilder: (BuildContext context, int index) {
return new GestureDetector(
onVerticalDragUpdate:
(DragUpdateDetails detail) {
setState(() {
_barOffset += detail.delta.dy;
});
print("$detail");
print("Update ${alphabet[index]}");
},
onVerticalDragStart: (DragStartDetails detail) {
print("onVerticalDragStart");
print("Start ${alphabet[index]}");
},
onVerticalDragEnd: (DragEndDetails detail) {
print("onVerticalDragEnd");
print("End ${alphabet[index]}");
},
onTap: () => print(alphabet[index]),
child: new Container(
margin: EdgeInsets.only(
left: 20.0, right: 10.0, top: 6.5),
height: 15.0,
child: new Text('${alphabet[index]}'),
));
}),
),
listview
flutter alphabet asked Nov 22 at 14:13
Anish Manchappillil
1076
pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
How to get the finger movement event in flutter like 'recyclerview alphabet index in android' check the sample image.
I have created a Positioned alphabet index listview but I can't find the current index in DragUpdate.
var alphabet = ["#","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
new Positioned(
top: .0,
left: 1,
bottom: 10,
width: 55,
child: Material(
borderRadius: BorderRadius.circular(15.0),
elevation: 10.0,
child: ListView.builder(
itemCount: alphabet.length,
itemBuilder: (BuildContext context, int index) {
return new GestureDetector(
onVerticalDragUpdate:
(DragUpdateDetails detail) {
setState(() {
_barOffset += detail.delta.dy;
});
print("$detail");
print("Update ${alphabet[index]}");
},
onVerticalDragStart: (DragStartDetails detail) {
print("onVerticalDragStart");
print("Start ${alphabet[index]}");
},
onVerticalDragEnd: (DragEndDetails detail) {
print("onVerticalDragEnd");
print("End ${alphabet[index]}");
},
onTap: () => print(alphabet[index]),
child: new Container(
margin: EdgeInsets.only(
left: 20.0, right: 10.0, top: 6.5),
height: 15.0,
child: new Text('${alphabet[index]}'),
));
}),
),
listview
flutter alphabet asked Nov 22 at 14:13
Anish Manchappillil
1076
How to get the finger movement event in flutter like 'recyclerview alphabet index in android' check the sample image.
I have created a Positioned alphabet index listview but I can't find the current index in DragUpdate.
var alphabet = ["#","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
new Positioned(
top: .0,
left: 1,
bottom: 10,
width: 55,
child: Material(
borderRadius: BorderRadius.circular(15.0),
elevation: 10.0,
child: ListView.builder(
itemCount: alphabet.length,
itemBuilder: (BuildContext context, int index) {
return new GestureDetector(
onVerticalDragUpdate:
(DragUpdateDetails detail) {
setState(() {
_barOffset += detail.delta.dy;
});
print("$detail");
print("Update ${alphabet[index]}");
},
onVerticalDragStart: (DragStartDetails detail) {
print("onVerticalDragStart");
print("Start ${alphabet[index]}");
},
onVerticalDragEnd: (DragEndDetails detail) {
print("onVerticalDragEnd");
print("End ${alphabet[index]}");
},
onTap: () => print(alphabet[index]),
child: new Container(
margin: EdgeInsets.only(
left: 20.0, right: 10.0, top: 6.5),
height: 15.0,
child: new Text('${alphabet[index]}'),
));
}),
),
listview
flutter alphabet listview
flutter alphabet asked Nov 22 at 14:13
Anish Manchappillil
1076
asked Nov 22 at 14:13
Anish Manchappillil
1076
asked Nov 22 at 14:13
Anish Manchappillil
1076
asked Nov 22 at 14:13
Anish Manchappillil
1076
asked Nov 22 at 14:13
Anish Manchappillil
1076
1076
pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47
add a comment |
pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47
pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47
add a comment |
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pub.dartlang.org/packages/side_header_list_view is somewhat similar
– Günter Zöchbauer
Nov 22 at 14:14
or maybe this one: pub.dartlang.org/packages/draggable_scrollbar
– diegoveloper
Nov 22 at 14:47