I implemented a page in my Flutter application that has a text input field and 2 time pickers that are activated by pressing the button to make them appear. The issue is that if I have a new value in the TextInputField and use one of the time pickers, after I'm done what I have typed in the input field will just reset.
Code snippet from the input field:
SizedBox(
width: 350,
child: TextField(
controller: titleController,
decoration: const InputDecoration(
border: OutlineInputBorder(),
hintText: 'Title',
),
onChanged: (value) {
title = value;
},
),
),
I've tried keeping the value of what is being typed in through a titleController and I have also attempted using the onChanged() method and a separate variable to keep the value in there. These solutions both didn't work for me, however. Is there any other solution to this issue?
If your TextField inside a stateless widget it will keep clearing the value of the controller everytime something pop on the screen, so try to put your TextField inside a stateful widget
Related
I'm trying to implement the new Material 3 DropdownMenu in my application to replace the old DropdownButton, but I can't seem to find where to add the error and helper texts.
Back in the DropdownButtonFormField, they would go inside the decoration parameter. Example:
decoration: InputDecoration(
labelText: 'labelText',
errorText: 'errorMessage',
helperText: 'helperText',
),
I could find the style parameters for both helper and error texts in the DropdownMenu, but not the parameter for the text itself.
Am I missing something or this widget does not support those parameters?
This was my DropdownButton before:
DropdownButtonFormField<MyItem>(
value: _selectedItem,
decoration: const InputDecoration(
labelText: 'Salutation',
errorText: 'errorMessage',
helperText: 'helperText',
border: OutlineInputBorder(),
),
onChanged: _onChanged,
items: items.map((MyItem item) {
return DropdownMenuItem<MyItem>(
value: item,
child: Text(item.title),
);
}).toList(),
);
The expected result with the DropdownMenu is a similar, but with the lowered position of the items menu and the integrated search feature it has. Those were the main reasons for the change.
For anyone needing this in the future, I opened an issue in the Flutter repository and they replied that the parameters are missing and will potentially be added.
Here is the link for the issue.
So I have this Container with a specific decoration border, and as a child I have the TextFormField with another styled border using the parameter enabledBorder.
My problem is: I have to make a double click to show the cursor and be able to write on my textformfield, because the focus only gets the container decoration and do not gets the focus from the inside of my TextFormField.
Here is my code:
onFocusChange: (focus) {
print(focus);
},
child: Focus(
child: Container(
decoration: _focusNode.hasFocus && widget.errorText == null
? BambamShadows.dropShadowSelected()
: null,
child: TextFormField(
cursorColor: BambamColors.brandBlack,
focusNode: _focusNode,
inputFormatters: widget.inputFormatters,
enabled: widget.enabled,
onChanged: widget.onChanged,
How can I get both Focus inside Container and TextFormField?
Check out this package # https://pub.dev/packages/indexed it'll grant you the same equivalent property that Z-index has in CSS which will allow you to position elements in a stack based on the index; so based on your question if your txtformField has a higher index it wouldn't be "below" the container (if that makes sense);
Also you can always consider modifying your UI to focus on using Stack (very good documentation about it here: https://medium.flutterdevs.com/stack-and-positioned-widget-in-flutter-3d1a7b30b09a)
I'd try indexed, else I'd clone your current java to implement a stack UI structure and test different variants till you nail it;
Try this autofocus: true, autofocus is a property in TextFormField class
I have a TextField that i am using to get a double in my flutter app. The TextField uses number keypad.
child: TextField(
style: TextStyle(color: Colors.white),
inputFormatters: [FilteringTextInputFormatter.allow(new RegExp("[0-9.]"))],
controller: controller,
keyboardType: TextInputType.number,
decoration: textDecorator,
onSubmitted: () {
//Some Action
},
),
I have used inputformatter to prevent user from clicking on other punctuations as shown in the code. My issue is i am able to enter something like "23.45.3" which is basically having two "." symbols which should not be allowed. Ideally after "23.", if the user tries to click "." from the keypad again it should be disabled.
Any help on how to do this is appreciated.
I started out writing a Flutter app to remotely control some radio stream. I ran into a problem when adding a TextFormField to display the stream's current volume setting. (The reason why I opted for a TextFormField instead of simply Text is that I wanted to use the field for both showing the current setting and letting the user change the current value in one place.)
The problem is the following: When I added the TextFormField (located inside the green bar in the screen shot below, after the text Vol:), I realized that whenever I started this view/page, the onboard keyboard always showed up by default when entering the page.
Instead, I would like the keyboard to only show up when the user clicks inside the TextFormField.
The code for the TextFormField looks as follows:
TextFormField(
onFieldSubmitted: (value){
print("The value entered is : $value");
},
// Define keyboard type
keyboardType: TextInputType.number,
// Make sure user doesn't enter letters or punctuation
inputFormatters: <TextInputFormatter>[WhitelistingTextInputFormatter.digitsOnly],
validator: (val){
return null;
},
autofocus: true,
controller: volTextEditingController,
style: TextStyle(
color: Colors.white,
fontSize: 16,
),
decoration: InputDecoration(
border: InputBorder.none,
),
maxLines: 1,
)
So, I was wondering whether someone knows how to prevent the keyboard from appearing on startup of the shown view/page. Thanks in advance! The full code, if needed, is available on GitGub.
I just figured out that this problem was caused by the setting autofocus: true. So, removing this solves the issue.
I've been scratching my head on this. Perhaps someone can help.
I have a statefull widget with a TextFormField and a button that calls the ImagePicker.pickImage function.
When I write something in the textformInput and then click on the select image button, when the image select returns from the picking, the textformfield has the text before I wrote.
It seems the onChanged function is never called when I press the button, so I cannot update my model variable.
I also tried to listen for focus out event on the textformfield widget but it also doesnt get called.
What am I missing? Any tip would be great.
Thanks
TextFormField(
keyboardType: TextInputType.multiline,
maxLines: 5,
controller: _observationsFieldController,
onChanged: (String value) {
onFieldChanged(_observationsFieldController, value);
widget.user_file.observations = value;
},
decoration: InputDecoration(
contentPadding: EdgeInsets.symmetric(horizontal:10, vertical: 2),
hintText: 'Observations',
suffix: clearSuffix(_observationsFieldController),
),
),
Have you tried using setState()? Since you are updating the state, it might work when you call set state.