How to make able to scroll listview inside SingleChildScrollView?
That's right, normally the list view scrolls even if the parent is a SingleChildScrollView.
But my case is special because I used
NotificationListener<ScrollNotification>(
onNotification: (ScrollNotification notification) {
if (notification is UserScrollNotification) {
if (notification.direction == ScrollDirection.forward) {
//trigger doing some event ...
...changing screen because of this event
So my Listview scrolling is absolutely doing nothing and changing the screen because of the parent event.
child: ListView.builder( ... // when scroll it doesn`t scroll and change screen because of parent
Can anyone solve this?
I think you have not provided the physics property for the list view:
Use -> physics:AlwaysScrollableScrollPhysics() for the listview to make it scrollable.
I am trying to find how can I know from which screen user has clicked the bottom nav screen. Basically I have to send event from which screen user clicked on botton nav. I have 4 bottom nav.
There is no direct way to check a previously selected item in the bottom bar what you can do you can make use of
onTap: (index) => changeTab(index)
It gives an index of the item user taps, Save index to some variable, and next time when use tap on the item you can consider previously saved value as an item from which the user is tapping.
You can check the last selected index in bottom navigation bar :
static int currentTab = 0;
static int lastIndex = 0;
When you implement the onPressed or onTap method on bottom bar:
onTap: (){
setState(() {
currentTab = index;
lastIndex = currentTab; // It keeps the last selected index.
}
});
}
And then u can call
currentTab = lastIndex.
I want to hide the keyboard when the user taps outside of a TextField. My current solution is to listen to taps in a GestureDetector that wraps the screen and call FocusScope.of(context).unfocus() to hide the keyboard.
The problem is that the GestureDetector doesn't detect taps on widgets like buttons. So when a button is tapped, the keyboard doesn't hide.
Since Button widgets handles their own gesture, you can just add FocusScope.of(context).unfocus() on your buttons' onPressed()
ElevatedButton(
onPressed: () {
// Unfocus from any focused TextField
FocusScope.of(context).unfocus();
// Do button function
},
child: Text('...'),
)
I am making a sign-up form. My problem is when the user fills the last field in my form and hit enter on the keyboard, but the keyboard does not dismiss. Is there any way to dismiss the keyboard?
If you want to dismiss the keyboard when the user clicks anywhere on the screen:
wrap the scaffold with GestureDetector:
GestureDetector(
onTap: () {
setState(() {
FocusScope.of(context).requestFocus(new FocusNode());
});
},
child: Scaffold());
If you want to dismiss the keyboard when the user fills the last textField:
track the textfields controllers and when you are at the last one use yourControllerName.unfocus();
I am trying to dismiss the keyboard when the user swipes from the edge to pop route.
Currently the keyboard doesn't dismiss until the route is completely gone popped, messing up some of the other pages layout until it dismisses
I did try to use a WillPopScope to determine when the user was going to pop the route, but unfortunately this disables the swipe to pop functionality from iOS or the CupertinoPageRoute.
I just want to find out if there's anyway I can determine when the user swipes from the edge to pop or taps the back button on the appBar and dismiss the keyboard as they do so.
If possible, I am trying to dismiss keyboard as soon as they start swiping to pop, as it happens in many apps.
I am attaching attaching a gif showing the effect I'm trying to achieve.
As suggested by Ovidiu
class DismissKeyboardNavigationObserver extends NavigatorObserver {
#override
void didStartUserGesture(Route route, Route previousRoute) {
SystemChannels.textInput.invokeMethod('TextInput.hide');
super.didStartUserGesture(route, previousRoute);
}
}
and in your Material App
MaterialApp(
navigatorObservers: [DismissKeyboardNavigationObserver()],
)
You need to create a custom class extending NavigatorObserver, and pass an instance of it to the navigatorObservers property of your MaterialApp or CupertinoApp.
Within that custom class, you can override didStartUserGesture and didStopUserGesture, which will be called when the swipe gesture starts/ends. This should allow you to achieve the behavior you are looking for. Note that didStartUserGesture indicates the current route as well as the previous route, based on which you could add logic to determine whether the keyboard should be dismissed or not.
This should come naturally and you shouldn't be directly concerned with that because actually, when you pop a route with the keyboard on, it should dismiss properly.
However, if you want to detect when the user starts swiping and dismiss the keyboard along with it and then pop the current route, you can easily achieve it by wrapping your screen widget with a GestureDetector like so:
Widget build(BuildContext context) {
double dragStart = 0.0;
return GestureDetector(
onHorizontalDragStart: (details) => dragStart = details.globalPosition.dx,
onHorizontalDragUpdate: (details) {
final double screenWidth = MediaQuery.of(context).size.width;
// Here I considered a back swipe only when the user swipes until half of the screen width, but you can tweak it to your needs.
if (dragStart <= screenWidth * 0.05 && details.globalPosition.dx >= screenWidth) {
FocusScope.of(context).unfocus();
}
child: // Your other widgets...
},
this is something i wrote to handle this issue. doesnt use any external packages, you would just wrap your content in the main function at the top.
Widget swipeOffKeyboard(BuildContext context, {Widget? child}) {
return Listener(
onPointerMove: (PointerMoveEvent pointer) {
disKeyboard(pointer, context);
},
child: child, // your content should go here
);
}
void disKeyboard(PointerMoveEvent pointer, BuildContext context) {
double insets = MediaQuery.of(context).viewInsets.bottom;
double screenHeight = MediaQuery.of(context).size.height;
double position = pointer.position.dy;
double keyboardHeight = screenHeight - insets;
if (position > keyboardHeight && insets > 0) FocusManager.instance.primaryFocus?.unfocus();
}