I have ui of text field from Figma.
There are 2 hint texts where 1st hintText is located at the beginning of textfield and other one is at the end.
As can be seen, trailing is hint text which is disappearing when user inputs number.
If you have any idea please share how to make this kind of text field)
Try this:
TextField(
textAlign: TextAlign.end,
decoration: InputDecoration(
prefixIcon: Padding(
padding: EdgeInsets.all(15), child: Text('Prefix')),
border: OutlineInputBorder(),
hintText: "Cym",
),
),
You can just use the trailing for the hint and can you onChanged method to handle changes.. Like you will be managing your text on the behavior of input. For example if the input is empty then you text will be something like "A" if you input something text will be changed.
TextFormField(
decoration: InputDecoration(
suffix: Text(text)
),
onChanged: (value) {
// handle or change your text here
if(value.isEmpty){
setState(() { text = "A"});
}
else{
setState(() { myState = "any text"});
}
},
)
Related
I want the Hint Text to remain even when Text is entered in the TextField:
But if I give TextField something like "hintText:" in simple way, Hint Text disappears when TextField is entered:
What should I do so that the hintText doesn't disappear even when a value is entered in the TextField?
.
.
.
I tried the following:
I. I tried using the suffix widget. But it appears from the end of the TextField. (If it was possible to make the suffix widget appear after the text, I think the problem would have been solved.) :
II. Obviously Prefix Widget can't help here :
Any answers are welcome, thanks.
You can use label to be visible at the top of the TextField & the hint u can simply add below line:
floatingLabelBehavior: FloatingLabelBehavior.always
full example is given below
TextFormField(
controller: textController,
style: theme.textTheme.bodyText2,
keyboardType: keyboardType ?? TextInputType.number,
enableInteractiveSelection: false,
decoration: InputDecoration(
labelText: labelText,
labelStyle: theme.textTheme.headline6,
suffixText: suffixText ?? '',
border: OutlineInputBorder(
borderSide:
BorderSide(color: theme.textTheme.bodyText2.color, width: 2),
),
hintText: '0.0',
floatingLabelBehavior: FloatingLabelBehavior.always),
validator: (value) {
if (value.isEmpty) {
return 'Please enter some text';
}
return null;
},
onChanged: (String text) => onChange(text),
);
How can I display a hint text in a TextField if it contains only space characters like ' '?
const TextField(
decoration: InputDecoration(
hintText: 'a hint text'
),
),
In this code example the hint text is only displayed if the content of the TextField is empty.
I need this because I need to detect when the user press the backspace button on an empty TextField. Read more here: https://medium.com/super-declarative/why-you-cant-detect-a-delete-action-in-an-empty-flutter-text-field-3cf53e47b631
After diving deeper into the problem I found a solution with InputDecorator:
const InputDecorator(
isEmpty: true, // if true, the hint text is shown
decoration: InputDecoration(
hintText: 'a hint text'
),
child: TextField(),
),
So my solution is this:
String _value = ''; // state variable
...
InputDecorator(
isEmpty: _value.trim().isEmpty, // override the default isEmpty behavior
decoration: const InputDecoration(
hintText: 'a hint text',
),
child: TextField(
onChanged: (v) => setState(() => _value = v),
),
),
Probably, you should use decoration property of your TextField.
Something like that:
SizedBox(
height: 50,
width: 100,
child: TextField(
decoration: InputDecoration(
border: OutlineInputBorder(),
label: Text('Your stable hint')
),
)
),
Hi I'm new to flutter so this may be a trivial problem, but I have a search box which contains an TextField and an Icon.
It works fine while the input text is less than the width of the input box, but once it exceeds that it seems to get chopped in half such that only the top half of it can be seen.
From what I understand Flutter is supposed to automatically deal with overflows. This is the build method for a generalised Input widget which is what I use along with the Icon in a Row. It's used within a Row but I don't believe that is the issue.
This is what it looks like when the text overflows.
return Expanded(
child: TextField(
autofocus: autofocus,
style: Theme.of(context).textTheme.bodyText2,
cursorColor: Theme.of(context).cursorColor,
maxLines: 1,
controller: controller,
decoration: InputDecoration(
border: InputBorder.none,
hintText: placeholder,
hintStyle: TextStyle(color: Theme.of(context).hintColor),
),
onChanged: (String value) {
onChange(value);
},
onSubmitted: (String value) {
onChange(value);
},
),
);
This is the GitHub repo in case you want to see the contextual usage. It's used in lib/routes/MainPage.dart as well as lib/routes/SearchPage.dart.
It turns out it was being cutoff due to the contentPadding on the InputDecoration. For those of you who are facing the same issue, change decoration property to:
InputDecoration(
contentPadding: EdgeInsets.zero, // Removes padding
isDense: true, // Centers the text
border: InputBorder.none,
hintText: placeholder,
hintStyle: TextStyle(color: Theme.of(context).hintColor),
)
I've made a program where the user can create an account, but I've placed some restrictions on the textfields (like for the First Name, it can only accept a string made of A-Z or a-z).
I want an "error text" to show under the textfield if the input is wrong (like if the user types "John1"), but I don't know how to do this. The simple way would be to use the onEditingComplete but this only works if the user taps on the keyboard the "done" key.
Is there a way to make the "error text" appear when the focus changes from one textfield to another?
You can use the validator property of the textfield to do this. It is recommended to encapsulate your fields in a Form() widget and then use the FormTextField() widget to implement your validations, this will enable an error to be shown at the bottom of the text field, if focus changes, or submission is attempted.
Example:
TextFormField(
onSaved: (String value) {},
validator: (String value) {
if (value.isEmpty) {
return 'Please enter some text';
}
return null;
},
)
The error will appear below in red fonts.
If you want to show error text whenever text/value changed you can do this.
In TextField 'onChanged' validate the user input using some regex and check for error ,if there is an error using TextField decoration 'errorText' property you can show required error.
Widget phoneNumberTextField() {
return Padding(
padding: EdgeInsets.fromLTRB(25, 10, 25, 10),
child: TextField(
style: TextStyle(color: Colors.white),
controller: _phoneNumberController,
maxLength: Constants.PhoneNumberTextFieldMaxLength,
onChanged: (value) {
_phoneNumberErrorText =
validatePhoneNumberTextField(_phoneNumberController.text);
_hasPhoneNumberError = _phoneNumberErrorText.isNotEmpty;
setState(() {});
},
keyboardType: TextInputType.number,
decoration: InputDecoration(
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.green, width: 1.0),
),
errorText: _hasPhoneNumberError ? _phoneNumberErrorText : null),
),
);
}
String validatePhoneNumberTextField(String text) {
String errorText = '';
if (text.length < 1) {
errorText = 'Phone Number should not be empty';
} else if (text.length != 10) {
errorText = 'Please enter valid phone number.';
}
return errorText;
}
In normal Android development, you can change the keyboard type dynamically but I can't seem to find a way to do so in Flutter.
TextInputType roomKeyboardType = TextInputType.text; // right on top of the build function
My custom form field:
Padding(
padding: const EdgeInsets.all(8.0),
child: FormBuilderTextField(
attribute: "room",
controller: widget.controllers[1],
keyboardType: roomKeyboardType,
decoration: InputDecoration(
filled: true,
labelText: "Room",
prefixIcon: Icon(Icons.location_on, color: Colors.black),
suffixIcon: IconButton(
icon: Icon(Icons.keyboard, color: Colors.black),
onPressed: () {
if (roomKeyboardType == TextInputType.text) {
roomKeyboardType = TextInputType.number;
return;
}
roomKeyboardType = TextInputType.text;
},
)),
validators: [
FormBuilderValidators.required(
errorText: "Please enter the room number",
),
],
),
),
Right now, I have something that looks like this with a keyboard IconButton on the end of the form field. When I click on it, I expect my keyboard type to change, yet when I do, nothing happens. It's supposed to toggle between text and number keyboard types and it only stays on text as that's what I have the variable initially set to. The variable I know is changing, it's just the fact that Flutter probably isn't remaking the widget so the keyboard stays the same. Is there any way to get around this and am I able to change the keyboardType dynamically?
you can change your keyboard type in TextFieldWidgets and many input widgets
like this:
TextField(
keyboardType: TextInputType.number,
hintText: '6 Digit-Code',
),