I have a TextField like this:
new Flexible(
fit: FlexFit.loose,
child: new Container(
alignment: FractionalOffset.topLeft,
child: new TextField(
decoration: new InputDecoration(
hintText: 'Add a note',
),
maxLines: 1,
onChanged: (value) => _showSaveOptions(value),
),
),
),
I'd like to have my TextField to start out with maxLines set to 1, but as I type, I would like the maxLines to increase, so that all the text remains on the page and I don't have to scroll up. However, I also don't want to start off with maxLines set to say, 5 or 10, because the empty TextField takes up more space that necessary. An example of the behavior I want to implement is in the Long Answer Text option in Google Forms, where it starts with one line:
and expands as I type:
I've considered setting maxLines to a counter that increments every time the user hits a newline, but how do I determine when the user has filled up a line?
Flutter was lagging multiline support in TextField. After an issue was raised regarding the same, the multiline feature has been added in the 0.0.16 release.
Make sure you upgrade flutter to the latest release. To get multiline TextField use:
new TextField(
maxLines: null,
keyboardType: TextInputType.multiline,
)
Hope this helped!
its look like a text-area. you can try with maxLines
maxLines: 8
TextField(
maxLines: 8,
decoration: InputDecoration(hintText: "Enter your text here", border: OutlineInputBorder(),
labelText: 'Post Body'),
),
Related
Is there a way to decrease the spacing between the actual input and the error text in a TextFormField widget? As it stands right now having error texts displayed on the form almost doubles the size of the form and I would like to keep the form area the same size with or without error text. From the pictures below you can see how much change it makes and that there is quite a lot of space between the input and the error message that could use reducing.
Form before errors
Form after errors
Here is an example of one of the formfields
Padding(
padding: EdgeInsets.only(
top: 5.0, bottom: 5.0, left: 25.0, right: 25.0),
child: TextFormField(
focusNode: myFocusNodeName,
controller: signupNameController,
keyboardType: TextInputType.text,
textCapitalization: TextCapitalization.words,
style: TextStyle(
fontFamily: "WorkSansSemiBold",
fontSize: 16.0,
color: Colors.black),
decoration: InputDecoration(
border: InputBorder.none,
icon: Icon(
FontAwesomeIcons.user,
color: Colors.black,
),
errorText: signupLastNameErrorText,
hintText: "Last Name",
hintStyle: TextStyle(
fontFamily: "WorkSansSemiBold", fontSize: 16.0),
),
validator: (value) =>
value.isEmpty ? 'Last Name can\'t be empty' : null,
onSaved: (value) => _lastname = value,
),
),
Add decoration in TextFormField Widget.
InputDecoration(
contentPadding: EdgeInsets.only(left: 11, right: 3, top: 14, bottom: 14),
errorStyle: TextStyle(fontSize: 9, height: 0.3),
)
There seems to be no way to do it unless you open the source code of InputDecoration (on your sdk folder flutter/packages/flutter/lib/src/material/input_decorator.dart)
look for _buildError
wrap the Text with Container like
Container(
padding: EdgeInsets.only(bottom: 4),
child: Text(
widget.errorText,
style: widget.errorStyle,
textAlign: widget.textAlign,
overflow: TextOverflow.ellipsis,
maxLines: widget.errorMaxLines,
)
)
The vertical padding of errorText is set in input_decorator.dart:
final double helperErrorHeight =
!helperErrorExists ? 0 : helperError.size.height + subtextGap;
The subtextGap is a static constant and equal to 8.0. Unfortunately, there's no easy way to override that value.
My solutions,
You can using:
maxLength
For each TextFeild,
=> You will have space you want when show error,
Affter that you can transparent color counter,
It Worked,
I tried to change text height, but I noticed that the animation is jumping.
I found another solution. Problem located in material/input_decorator.dart file. In _RenderDecoration class. It contains:
static const double subtextGap = 8.0;
I copied all files, remove InputDecorationTheme and changed value to 0.0.
It also contains InputDecoration. I extended InputDecoration and remove override methods:
class CustomInputDecoration extends InputDecoration
And then i used it in the component:
TextFormField(
decoration: CustomInputDecoration(...)
My flutter version: 2.2.1. I noticed that flutter team often rewrites components, so be careful! There may be changes in next releases.
I want to make my TextField height the same as my container height. Please check my code below and let me know how can I make TextField match_parent of my container. I've checked this question The equivalent of wrap_content and match_parent in flutter? but I didn't find any solution. I need to make TextField to take full height and width of my container.
new Container(
height: 200.0,
decoration: new BoxDecoration(
border: new Border.all(color: Colors.black)
),
child: new SizedBox.expand(
child: new TextField(
maxLines: 2,
style: new TextStyle(
fontSize: 16.0,
// height: 2.0,
color: Colors.black
),
decoration: const InputDecoration(
hintText: "There is no data",
contentPadding: const EdgeInsets.symmetric(vertical: 40.0),
)
),
),
)
Please check the screenshot below. As said, I need my TextField to take full height of Container
Here is my solution:
Container(
height: 200,
color: Color(0xffeeeeee),
padding: EdgeInsets.all(10.0),
child: new ConstrainedBox(
constraints: BoxConstraints(
maxHeight: 200.0,
),
child: new Scrollbar(
child: new SingleChildScrollView(
scrollDirection: Axis.vertical,
reverse: true,
child: SizedBox(
height: 190.0,
child: new TextField(
maxLines: 100,
decoration: new InputDecoration(
border: InputBorder.none,
hintText: 'Add your text here',
),
),
),
),
),
),
),
It works pretty good for me. And here is a screen shot.
Answering this in 2021. There is an expands property available now. This code works:
Column(
children: [
Expanded(
child: TextField(
maxLines: null,
minLines: null,
expands: true,
),
flex: 1),
],
)
Let's remove a few lines in code and understand how flutter works.
Why we are giving height 200 to Container. Can't the Container adjust the height based on its child (in this case SizedBox.expand)
If we remove height 200, then Container occupied the entire screen because of SizedBox.expand
Do we really need the SizedBox for our use case. Let's remove that also see what happens.
Now our Container wraps the TextField. But there is some space above and below.
Who decided that space? TextField's decoration's contentPadding. Let's remove that also. It looks like below where textField wrapped by Container. Hope this is what you want. If not, please comment, we can tweak a bit and get what you want. Cheers
Final version of code which displays the above image
new Container(
// height: 200.0,
decoration: new BoxDecoration(
border: new Border.all(color: Colors.black)
),
child: new TextField(
maxLines: 2,
style: new TextStyle(
fontSize: 16.0,
// height: 2.0,
color: Colors.black
),
decoration: const InputDecoration(
hintText: "There is no data",
// contentPadding: const EdgeInsets.symmetric(vertical: 40.0),
)
),
)
Currently the only way to achieve the TextField to fill the available vertical space is:
TextField(maxLines: 1000000) //maxlines: any large int
While it is tempting to use TextField(maxLines: null), it will just set the TextField to expand with its content, until it reaches its container limit.
I think there needs to be a bool stretchVertically parameter. TextField(stretchVertically: true) would mean that the TextField will try to fill as much vertical space as it can. stretchVertically and maxLines would have to be mutually exclusive.
I've tried many configurations of the Flutter TextField but can't figure out how to build this one.
I'm looking for a textfield that is a single line initially and it auto expands as the text is entered into it and then at some point begins scrolling itself.
This can be achieved partially by using the maxLines: null attribute. But then when a lot of text is entered the Text in the textfield itself overflows.
And if the maxLines is set to a value then the whole textfield itself gets expanded to those many lines to start off with rather than beginning with a single line.
Is there a way to limit the height of textfield at some point like done in many chat apps like WhatsApp and telegram.
Container(
child: new ConstrainedBox(
constraints: BoxConstraints(
maxHeight: 300.0,
),
child: TextField(
maxLines: null,
),
),
),
),
)
In older Flutter versions it was
Container(
child: new ConstrainedBox(
constraints: BoxConstraints(
maxHeight: 300.0,
),
child: new Scrollbar(
child: new SingleChildScrollView(
scrollDirection: Axis.vertical,
reverse: true,
child: new TextField(
maxLines: null,
),
),
),
),
)
Now we actually have minLines parameter of TextField, no workaround needed anymore.
TextField(
minLines: 1,
maxLines: 5,
)
The accepted answer by Gunter is good enough if you don't have any style for the TextField. But if you have at least an underline / bottom border for the TextField, it will disappear when scroll up.
My recommendation is to calculating the lines with TextPainter, then apply the calculated number of lines to TextField. Here's the code, replace your current TextField with LayoutBuilder :
LayoutBuilder(
builder: (context, size){
TextSpan text = new TextSpan(
text: yourTextController.text,
style: yourTextStyle,
);
TextPainter tp = new TextPainter(
text: text,
textDirection: TextDirection.ltr,
textAlign: TextAlign.left,
);
tp.layout(maxWidth: size.maxWidth);
int lines = (tp.size.height / tp.preferredLineHeight).ceil();
int maxLines = 10;
return TextField(
controller: yourTextController,
maxLines: lines < maxLines ? null : maxLines,
style: yourTextStyle,
);
}
)
TextField(
minLines: 1,
maxLines: 5,
maxLengthEnforced: true,
),
I want a way to make a TextField or EditableText's text wrap onto another line.
And how to make them multiline.
I don't know if it matters, but the EditableText sits inside a ListTile > Card > Container.
This is my code:
return ListTile(
title: Card(
child: Container(
padding: EdgeInsets.all(10.0),
child: EditableText(
textAlign: TextAlign.start,
focusNode: _focusNode,
controller: _textEditingController,
style: TextStyle(
color: Colors.black,
fontSize: 18.0,
),
keyboardType: TextInputType.multiline,
cursorColor: Colors.blue,
),
),
),
);
It doesn't work please help. I have searched everywhere now!
I'm running flutter version: 0.4.4 and dart version: 2.0.0-dev.54.0
You need to set the property maxLines to either null (for infinite growth) or a fixed number.
By default maxLines is equal to 1.
It may sound easy but How can we do a multi-line editable textfield in flutter? TextField works only with a single line.
Edit: some precisions because seems like it's not clear.
While you can set multiline to virtually wrap the text content, it's still not multiline. It's a single line displayed into multiple lines.
If you want to do something like this then you can't. Because you don't have access to ENTER button. And no enter button means no multiline.
To use auto wrap, just set maxLines as null:
TextField(
keyboardType: TextInputType.multiline,
maxLines: null,
)
If the maxLines property is null, there is no limit to the number of lines, and the wrap is enabled.
If you want your TextField be adapted to the user input then do this:
TextField(
keyboardType: TextInputType.multiline,
minLines: 1,//Normal textInputField will be displayed
maxLines: 5,// when user presses enter it will adapt to it
);
here you can set the max lines to whatever you want and you are good to go.
In my opinion setting the maxlines to null is not a good choice that's why we should set it to some value.
Although other people already mentioned that the keyboard type "TextInputType.multiline" can be used, I wanted to add my implementation of a TextField that automatically adapts its height when a new line is entered, as it is often desired to immitate the input behaviour of WhatsApp and similar apps.
I'm analyzing the number of '\n' chatacters in the input for this purpose each time the text is changed. This seems to be an overkill, but unfortunately I didn't find a better possibility to achieve this beahivour in Flutter so far and I didn't notice any performance problems even on older smartphones.
class _MyScreenState extends State<MyScreen> {
double _inputHeight = 50;
final TextEditingController _textEditingController = TextEditingController();
#override
void initState() {
super.initState();
_textEditingController.addListener(_checkInputHeight);
}
#override
void dispose() {
_textEditingController.dispose();
super.dispose();
}
void _checkInputHeight() async {
int count = _textEditingController.text.split('\n').length;
if (count == 0 && _inputHeight == 50.0) {
return;
}
if (count <= 5) { // use a maximum height of 6 rows
// height values can be adapted based on the font size
var newHeight = count == 0 ? 50.0 : 28.0 + (count * 18.0);
setState(() {
_inputHeight = newHeight;
});
}
}
// ... build method here
TextField(
controller: _textEditingController,
textInputAction: TextInputAction.newline,
keyboardType: TextInputType.multiline,
maxLines: null,
)
TextFormField(
minLines: 2,
maxLines: 5,
keyboardType: TextInputType.multiline,
decoration: InputDecoration(
hintText: 'description',
hintStyle: TextStyle(
color: Colors.grey
),
border: OutlineInputBorder(
borderRadius: BorderRadius.all(Radius.circular(20.0)),
),
),
),
While this question is rather old, there is no extensive answer that explains how to dynamically resize the TextField with little developer effort. This is especially of major importance when the TextField is either placed in a flexbox such as ListView, SingleChildScrollView, etc. (the flexbox will not be able to determine the intrinsic size of an expandable TextField).
As suggested by many other users, build your TextField like so:
TextField(
textInputAction: TextInputAction.newline,
keyboardType: TextInputType.multiline,
minLines: null,
maxLines: null, // If this is null, there is no limit to the number of lines, and the text container will start with enough vertical space for one line and automatically grow to accommodate additional lines as they are entered.
expands: true, // If set to true and wrapped in a parent widget like [Expanded] or [SizedBox], the input will expand to fill the parent.
)
How to cope with the missing intrinsic height of the TextField?
Wrap the TextField in a IntrinsicHeight class to provide the dynamically computed intrinsic height of the expandable TextField to its parent (when requested via e.g. flexbox).
1. Fixed height:
(A) Based on lines:
TextField(
minLines: 3, // Set this
maxLines: 6, // and this
keyboardType: TextInputType.multiline,
)
(B) Based on height:
SizedBox(
height: 200, // <-- TextField expands to this height.
child: TextField(
maxLines: null, // Set this
expands: true, // and this
keyboardType: TextInputType.multiline,
),
)
2. Flexible height:
Use a Column and wrap the TextField in Expanded:
Column(
children: [
Expanded(
child: TextField(
maxLines: null, // Set this
expands: true, // and this
keyboardType: TextInputType.multiline,
),
),
],
)
(Optional) Set decoration:
You can se this decoration to any of the above TextField:
decoration: InputDecoration(
hintText: 'Write a message',
filled: true,
)
You have to use this line in the TextField widget :
maxLines: null,
if didn't work , just note that you have to delete this :
textInputAction: TextInputAction.next
it's disable multi line property action in the keyboard ..
use this
TextFormField(
keyboardType: TextInputType.multiline,
maxLines: //Number_of_lines(int),)
This Code Worked for me, Also I'm able to use ENTER for web & mobile.
#override
Widget build(BuildContext context) {
double width = MediaQuery.of(context).size.width;
double height = MediaQuery.of(context).size.height;
return Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
child: ConstrainedBox(
// fit: FlexFit.loose,
constraints: BoxConstraints(
maxHeight: height,//when it reach the max it will use scroll
maxWidth: width,
),
child: const TextField(
keyboardType: TextInputType.multiline,
maxLines: null,
minLines: 1,
decoration: InputDecoration(
fillColor: Colors.blueAccent,
filled: true,
hintText: "Type ",
border: InputBorder.none,
),
),
),
)
]);
}
TextField has maxLines property.
Use Expanded widget for dynamic feels
Expanded(
child: TextField(
keyboardType: TextInputType.multiline,
minLines: 1,
maxLines: 3,
),
)
if above once not worked for you then try add minLines also
TextField(
keyboardType: TextInputType.multiline,
minLines: 3,
maxLines: null);
For autowrap just use null for maxLines
TextFormField(
keyboardType: TextInputType.multiline,
maxLines: null,
)
or
TextField(
keyboardType: TextInputType.multiline,
maxLines: null,
)
Official doc states:
The maxLines property can be set to null to remove the restriction on the number of lines. By default, it is one, meaning this is a single-line text field.
NOTE: maxLines must not be zero.
Specify TextInputAction.newline to make a TextField respond to the enter key and accept multi-line input:
textInputAction: TextInputAction.newline,
use this
Expanded(
child: TextField(
controller: textMessageController,
keyboardType: TextInputType.multiline,
textCapitalization: TextCapitalization.sentences,
minLines: 1,
maxLines: 3,
onChanged: ((value) {
setState(() {
_messageEntrer = value;
});
}),
decoration: InputDecoration(
hintText: "Type your message here",
hintMaxLines: 1,
contentPadding:
const EdgeInsets.symmetric(horizontal: 8.0, vertical: 10),
hintStyle: TextStyle(
fontSize: 16,
),
fillColor: Colors.white,
filled: true,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(30.0),
borderSide: const BorderSide(
color: Colors.white,
width: 0.2,
),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(30.0),
borderSide: const BorderSide(
color: Colors.black26,
width: 0.2,
),
),
),
),
),