Do you guys know how to make pop up that small and appear below icon like this? I have made it with AlertDialog, but the pop up is on the center of the screen and too big.
Using this code you can show the menu where you need
Function
void showPopUpMenuAtTap(BuildContext context, TapDownDetails details) {
showMenu(
context: context,
position: RelativeRect.fromLTRB(
details.globalPosition.dx,
details.globalPosition.dy,
details.globalPosition.dx,
details.globalPosition.dy,
),
items: const [
PopupMenuItem<String>(value: '1', child: Text('menu option 1')),
PopupMenuItem<String>(value: '2', child: Text('menu option 2')),
PopupMenuItem<String>(value: '3', child: Text('menu option 3')),
],
).then((value) {
if (value == null) return;
if (value == "1") {
//code here
log("message", name: value);
} else if (value == "2") {
//code here
log("message", name: value);
} else if (value == "3") {
//code here
log("message", name: value);
}
});
}
You can call like this
GestureDetector(
child: const Icon(Icons.menu),
onTapDown: (details) => showPopUpMenuAtTap(context, details),
),
PopupMenuButton from Flutter sdk
https://api.flutter.dev/flutter/material/PopupMenuButton-class.html
You can profile ShapeBorder as RoundedRectangleBorder.
what you need is popupmenu not AlertDialog here the documantain of popupmenu
with the feature shape, you could play with the shape and size ...etc
I am displaying a list of data fetched from my sql database using DataCell, but I don't really like how it looks and want to switch it to display it using ListTile, this is the code that I am using to display it using DataCell:
return SingleChildScrollView(
scrollDirection: Axis.vertical,
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: DataTable(
columns: [
DataColumn(
label: Text(''),
)
],
rows: _chatUsers
.map(
(user) => DataRow(cells: [
DataCell(
Text(user.firstNameUser),
// Add tap in the row and populate the
// textfields with the corresponding values to update
onTap: () {
// Set the Selected employee to Update
_selectedUser = user;
setState(() {
});
},
),
]),
)
.toList(),
),
),
);
You need to use the ListView widget for this.
There is a lot explained in that API reference section, I think you will be able to rework you app after reading.
So you will have a ListView with the childrenproperty set to smth like
_chatUsers
.map(
(user) =>
ListTile(
title: Text(user.firstNameUser),
// Add tap in the row and populate the
// textfields with the corresponding values to update
onTap: () {
// Set the Selected employee to Update
_selectedUser = user;
setState(() {
});
},
),
)
.toList()
I'm new to flutter and I have issues with Radio.
I got it to work perfectly when using the "regular" method:
int _groupValue=-1;
...
...
child: Align(
alignment: Alignment.center,
child: Column(
children: <Widget>[
RadioListTile(activeColor: Colors.black,
groupValue: _groupValue,
value: 1,
onChanged: (value) { setState(() {
_groupValue=value;
}); },
title: Text("a"),
),
RadioListTile(activeColor: Colors.black,
groupValue: _groupValue,
value: 2,
onChanged: (value) { setState(() {
_groupValue=value;
}); },
title: Text("b"),
),
],
),
),
Since I'm using data from API to create the radio buttons I've changed this code to this:
child: Align(
alignment: Alignment.center,
child: children: radioListView
),
),
and on click of a button i call async method to download the data from the API and like this :
void getApiData() async {
...
...
...
setState() {
var radioListView = List<RadioListTile>();
for (Map<String, dynamic> c in apidata)) {
radioListView.add(new RadioListTile(
groupValue: _groupValue,
value: c['option_value'],
title: c['title'],
onChanged: (value) { setState(() {
_groupValue=value;
});
),
));
}
}
}
using the first code it works but using the second code I just get to see the items but nothing happens when I click on the radio buttons (although the onchanged does trigger because I tried to print the value and it's fine)
what am I doing wrong?
I found the solution here:
https://www.didierboelens.com/2018/05/hint-5-how-to-refresh-the-content-of-a-dialog-via-setstate/
The problem was that I had to seperate the widgets and create another stateful widget for the radio
I have a data table that scrolls horizontally and vertically due to the amount of data available. I want the top row which specifies the column names to always be visible when scrolling down.
code: No issues in the code I am getting the results, but when I scroll down The header wont be shown. Can any one help me in how to fix the header(1st row).
My header(1st row) elements keeps changing for each req,
the way its implemented is there will be cards in my dashboard onclicking each card it hits the API and I am displaying its result i.e contents of field named header list as my first row.
Content of the header keeps changing for each card. so once any card is clicked new page containing its data will popup, there I need to fix the header.
Widget getTable(BuildContext context, var data) {
Widget _widget;
_widget = SingleChildScrollView(
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: DataTable(
rows: createDataRows(context, data),
columns: createDataColumns(context, data),
),
),
);
return _widget;
}
List<DataRow> createDataRows(BuildContext context, var jsonData) {
List<DataRow> _dataRows = [];
List<DataCell> _cells = [];
String _dataCellTitle;
Map<String, Object> headers = jsonData['headers'];
Map<int, String> headerMapping;
headerMapping = headers.keys
.toList()
.asMap()
.map((index, value) => MapEntry(index + 1, value));
if (jsonData["data"] == null) {
_dataRows = [];
} else {
for (var j = 0; j < jsonData["data"].length; j++) {
_cells.add(DataCell(Text('${j + 1}')));
for (int i = 1; i <= headerMapping.length; i++) {
_dataCellTitle = "${jsonData["data"][j][headerMapping[i]]}" ?? '-';
_cells.add(DataCell(Text('$_dataCellTitle')));
}
_dataRows.add(DataRow(cells: _cells));
_cells = [];
}
}
return _dataRows;
}
List<DataColumn> createDataColumns(BuildContext context, var jsonData) {
String columnTitle;
List<DataColumn> _dataColumns = [];
Map<String, Object> headers = jsonData['headers'];
Map<int, String> headerMapping;
headerMapping = headers.keys
.toList()
.asMap()
.map((index, value) => MapEntry(index + 1, value));
_dataColumns.add(DataColumn(label: Text('S. No.')));
for (int i = 1; i <= headerMapping.length; i++) {
columnTitle = headers[headerMapping[i]];
_dataColumns.add(
DataColumn(label: Text('$columnTitle')),
);
}
return _dataColumns;
}
like this here
where the first row is constant and first column also.
You can do the smart thing here, You can create two datatables one with only column, and one with rows.
Suppose your list_rows is a List<DataRow> and list_column is List<DataColumn> of your actual columns, then:
Column(
children: [
DataTable(
rows: [], // DONT PROVIDE ROWS
columns: list_column, // PROVIDE YOUR COLUMNS HERE
),
Expanded(
child: SingleChildScrollView(
child: DataTable(
rows: list_lows, // PROVIDE ROWS HERE
columns: List.generate(
list_column.length, (index) => DataColumn(label: Text(''))), // GENERATE EMPTY COLUMNS
headingRowHeight: 0, // SHRINK THE HEADER
),
),
),
],
)
This way your columns will always be on top!
Okay so you have one method getTable to get data content,
In it you are calling two methods
1) To fetch rows
2) To fetch columns.
But you didn't show the code of DataTable Widget.
I assume it is ListView or Column.
So in your DataTable Widget you should create one static Row for that heading.
ListView(
children: <Widget>[
Row(
children: <Widget>[
Text('$heading1'),
Text('$heading2'),
Text('$heading3'),
],
),
/// Your row and column
],
);
With information you provided i assume it will help you out.
I have Used Like that , and its working fine :
SingleChildScrollView dataBody() {
return SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: SingleChildScrollView(
scrollDirection: Axis.vertical,
child: DataTable(
columnSpacing: 10,
//sortAscending: sort,
//sortColumnIndex: 0,
columns: [
DataColumn(label: Text("Date"), numeric: false),
DataColumn(label: Text("Particulars"), numeric: false),
DataColumn(label: Text("Amount"), numeric: true)
],
rows: transactions
.map((txn) => DataRow(cells: [
DataCell(
Text(
DateFormat('dd-MMM-yyyy').format(txn.date),
style: TextStyle(fontSize: 12.0),
),
/*onTap: () {
print('Selected ${txn.date}');
}*/
),
DataCell(FittedBox(
child: Text(
txn.particulars,
),
)),
DataCell(Text(txn.amount.toString()))
]))
.toList(),
),
));
}
This is the solution to make Datatable Header sticky :
SizedBox(
height: 500,
width: 1000,
child: Scrollbar(
controller: _vertical,
thumbVisibility: true,
trackVisibility: true,
child: Scrollbar(
controller: _horizontal,
thumbVisibility: true,
trackVisibility: true,
child: SingleChildScrollView(
controller: _horizontal,
scrollDirection: Axis.horizontal,
child: Stack(
children: [
SingleChildScrollView(
controller: _vertical,
scrollDirection: Axis.vertical,
child: DataTable(
rows: list_rows, // PROVIDE ROWS HERE
columns: List.generate(
list_column.length,
(index) => DataColumn(
label: Text(''),
),
), //GENERATE EMPTY COLUMNS
headingRowHeight: 90, // HEADER HEIGHT
),
),
DataTable(
rows: [], // DONT PROVIDE ROWS
columns:
list_column, // PROVIDE YOUR COLUMNS HERE
headingRowHeight: 90, // HEADER HEIGHT
headingRowColor: MaterialStateColor.resolveWith(
(states) => Color.fromRGBO(86, 153, 255, 1),
),
border: TableBorder.all(
width: 1.0, color: Colors.white),
),
],
),
),
),
),
),
I created a Cupertinopicker widget that contains the 7 days of the week, but when you open the picker, they appear very squished together. Not sure why this is as another Cupertinopicker I created works fine.
I've copied exactly the code for the other Cupertinopicker I implemented (obviously changing the necessary components of the code), but it doesn't work in my second implementation.
Widget _buildWeeklyItemPicker() {
return Container(
height: 250,
child: CupertinoPicker(
itemExtent: 7.0,
backgroundColor: CupertinoColors.white,
onSelectedItemChanged: (index1) {
setState(() {
selectedWItemString2 = daysOfTheWeek[index1];
});
},
children: List<Widget>.generate(
daysOfTheWeek.length,
(index1) {
return Center(
child: Text(daysOfTheWeek[index1]),
);
},
),
),
);
}
^^ that's building the CupertinoPicker
List<String> daysOfTheWeek = [
'Monday',
'Tuesday',
'Wednesday',
'Thursday',
'Friday',
'Saturday'
'Sunday'
];
^^ that's my list of items that should appear in the picker
InkWell(
child: Text(
selectedWItemString2 == null ? "_______" : selectedWItemString2),
onTap: () async {
await showModalBottomSheet<int>(
context: context,
builder: (BuildContext context) {
return _buildWeeklyItemPicker();
},
);
},
),
^^ tapping the InkWell above open up the CupertinoPicker
I have attached a picture of what it should look like and what it does look like.
It is because you've set itemExtent: 7.0. Increase the value according to your requirement.