I wonder how to change the default width of an AlertDialog, I only succeeded to change the border radius :
Here is my code :
showDialog(
context: context,
builder: (_) =>
new AlertDialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10.0))
),
content: ProductPreviewScreen(),
)
);
Result expected :
Any idea?
As of May 2020, if you want to change the inset padding of a dialog, all you have to do is use the Dialog class and override the 'insetPadding' property. You can make a dialog extend all the way to the screen edges if you want to.
You can also make some cool custom dialogs by making the dialog surface itself transparent and then add whatever widgets you want. For example:
showDialog(Dialog(
backgroundColor: Colors.transparent,
insetPadding: EdgeInsets.all(10),
child: Stack(
overflow: Overflow.visible,
alignment: Alignment.center,
children: <Widget>[
Container(
width: double.infinity,
height: 200,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
color: Colors.lightBlue
),
padding: EdgeInsets.fromLTRB(20, 50, 20, 20),
child: Text("You can make cool stuff!",
style: TextStyle(fontSize: 24),
textAlign: TextAlign.center
),
),
Positioned(
top: -100,
child: Image.network("https://i.imgur.com/2yaf2wb.png", width: 150, height: 150)
)
],
)
));
Results in:
This is much more simple then the other answers make it out to be. Just use a builder to change the size of the dialog as it is being built(constructed, instantiated in other languages). This means you can also query the screen size and make a decision on how much space you want depending on said screen size. For example more space on a tablet then on a phone. You can make Scaffold a child of the Container if you need the App bar and other functions.
showDialog(
context: context,
builder: (_) => new AlertDialog(
shape: RoundedRectangleBorder(
borderRadius:
BorderRadius.all(
Radius.circular(10.0))),
content: Builder(
builder: (context) {
// Get available height and width of the build area of this widget. Make a choice depending on the size.
var height = MediaQuery.of(context).size.height;
var width = MediaQuery.of(context).size.width;
return Container(
height: height - 400,
width: width - 400,
);
},
),
)
);
Examples of different sizes:
Optionally add these to remove unneeded inner/outer border space.
insetPadding: EdgeInsets.zero,
contentPadding: EdgeInsets.zero,
clipBehavior: Clip.antiAliasWithSaveLayer,
Using built-in dialog:
To increase the width:
AlertDialog(
title: Text("AlertDialog"),
insetPadding: EdgeInsets.zero,
)
To decrease the width:
AlertDialog(
title: Text("AlertDialog"),
insetPadding: EdgeInsets.symmetric(horizontal: 100),
)
Using custom dialog:
Call this method:
showGeneralDialog(
context: context,
barrierColor: Colors.black.withOpacity(0.5),
pageBuilder: (_, __, ___) {
return Material(
color: Colors.transparent,
child: Center(
child: Container(
color: Colors.white, // Dialog background
width: 120, // Dialog width
height: 50, // Dialog height
child: SingleChildScrollView(
child: Column(
children: [
Text('I am a small Dialog'),
],
),
),
),
),
);
},
);
You could try to wrap your AlertDialog widget with ConstrainedBox widget as suggested in here and set your desired value for maxWidth parameter.
UPDATED
I just looked at the code of the parent of the AlertDialog widget which is the Dialog widget and found out that it wrapped its child with a ConstrainedBox widget with a minWidth of 280 pixels. This is the reason why we can't change the width of the AlertDialog widget.
Fortunately, there are two things that we can do. First option would be to alter the default minWidth of the Dialog Widget inside the dialog.dart file. Note that changing this would affect all of your flutter projects that uses the Dialog widget.
//inside dialog.dart
class Dialog extends StatelessWidget {
...
#override
Widget build(BuildContext context) {
final DialogTheme dialogTheme = DialogTheme.of(context);
return AnimatedPadding(
padding: MediaQuery.of(context).viewInsets + const EdgeInsets.symmetric(horizontal: 40.0, vertical: 24.0),
duration: insetAnimationDuration,
curve: insetAnimationCurve,
child: MediaQuery.removeViewInsets(
removeLeft: true,
removeTop: true,
removeRight: true,
removeBottom: true,
context: context,
child: Center(
child: ConstrainedBox(
constraints: const BoxConstraints(minWidth: 280.0), // You can set your desired value for minWidth here
child: Material(
elevation: 24.0,
...
You can then use the AlertDialog like this:
showDialog(
context: context,
builder: (_) => AlertDialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10.0))
),
contentPadding: EdgeInsets.all(0.0),
content: ProductPreviewScreen(),
)
)
);
The other way would be to create our own customize dialog.
showDialog(
context: context,
builder: (_) => Center( // Aligns the container to center
child: Container( // A simplified version of dialog.
width: 100.0,
height: 56.0,
color: Colors.pink,
)
)
);
Use Padding widget
Padding(
padding: EdgeInsets.only(left: 50.0, right: 50.0),
child://AlertDialog or any other Dialog you can use
Dialog(
elevation: 0.0,
backgroundColor: Colors.transparent,
child: Container(
width: 10.0,
height: 50.0,
color: Colors.red,
)
))
My solution is to enclose the Dialog in a widget that defeats the extra padding added by the Dialog class by modifying the MediaQueryData.
import 'package:myapp/widgets/dialog_inset_defeat.dart';
...
showDialog(
context: context,
builder: (_) => DialogInsetDefeat(
context: context,
child: SimpleDialog(...),
)
);
... or use showDialogWithInsets() for custom values:
showDialogWithInsets(
context: context,
edgeInsets: EdgeInsets.symmetric(horizontal: 8),
builder: (_) => SimpleDialog(...),
)
);
File dialog_inset_defeat.dart
import 'package:flutter/material.dart';
/// A widget to defeat the hard coded insets of the [Dialog] class which
/// are [EdgeInsets.symmetric(horizontal: 40.0, vertical: 24.0)].
///
/// See also:
///
/// * [Dialog], for dialogs that have a message and some buttons.
/// * [showDialog], which actually displays the dialog and returns its result.
/// * <https://material.io/design/components/dialogs.html>
/// * <https://stackoverflow.com/questions/53913192/flutter-change-the-width-of-an-alertdialog>
class DialogInsetDefeat extends StatelessWidget {
final BuildContext context;
final Widget child;
final deInset = EdgeInsets.symmetric(horizontal: -40, vertical: -24);
final EdgeInsets edgeInsets;
DialogInsetDefeat({#required this.context, #required this.child, this.edgeInsets});
#override
Widget build(BuildContext context) {
var netEdgeInsets = deInset + (edgeInsets ?? EdgeInsets.zero);
return MediaQuery(
data: MediaQuery.of(context).copyWith(viewInsets: netEdgeInsets),
child: child,
);
}
}
/// Displays a Material dialog using the above DialogInsetDefeat class.
/// Meant to be a drop-in replacement for showDialog().
///
/// See also:
///
/// * [Dialog], on which [SimpleDialog] and [AlertDialog] are based.
/// * [showDialog], which allows for customization of the dialog popup.
/// * <https://material.io/design/components/dialogs.html>
Future<T> showDialogWithInsets<T>({
#required BuildContext context,
bool barrierDismissible = true,
#required WidgetBuilder builder,
EdgeInsets edgeInsets,
}) {
return showDialog(
context: context,
builder: (_) => DialogInsetDefeat(
context: context,
edgeInsets: edgeInsets,
child: Builder(builder: builder),
),
// Edited! barrierDismissible: barrierDismissible = true,
barrierDismissible: barrierDismissible,
);
}
Works for me as of Flutter 1.8.3. YMMV
use Dialog()
Dialog(
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15)),
insetPadding: EdgeInsets.all(15),
child: SingleChildScrollView(
child: Container(),
),
),
);
Medling with insetWidth and future builder etc. didn't work for me - just editing the content prop's width worked perfectly.
showDialog(
context: context,
builder: (context) {
Future.delayed(Duration(seconds: 1000), () {
Navigator.of(context).pop(true);
});
return AlertDialog(
insetPadding: EdgeInsets.all(8.0),
title: Text(
"Time to go pro!",
textAlign: TextAlign.center,
),
content: Container(
width: MediaQuery.of(context).size.width,
child: BuySheet(
applePayEnabled: applePayEnabled,
googlePayEnabled: googlePayEnabled,
applePayMerchantId: applePayMerchantId,
squareLocationId: squareLocationId),
),
);
});
I finally found a way to change the width of an AlertDialog.
Just wrap the "content" with a Container, and set the width to it.
return AlertDialog(
...
content: Container(
width: MediaQuery.of(context).size.width*0.45,
child: ...
AlertDialog with width modified
You can change the AlertDialog property insetPadding it will be a simple way for you.
void alertBox() {
showDialog(
context: context,
builder: (context) => AlertDialog(
insetPadding: EdgeInsets.symmetric(horizontal: 10, vertical: 10),
// (horizontal:10 = left:10, right:10)(vertical:10 = top:10, bottom:10)
contentPadding: EdgeInsets.zero,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
content: Container(
width: MediaQuery.of(context).size.width - 20,
// width = device width minus insetPadding = deviceWidth - 20 (left:10, right:10 = 20)
height: MediaQuery.of(context).size.height - 20,
// height = device height minus insetPadding = deviceHeight - 20 (top:10, bottom:10 = 20)
child: ClipRRect(
borderRadius: BorderRadius.circular(10),
child: Card(
margin: EdgeInsets.zero,
color: Colors.amber,
),
),
),
),
);
}
Refer this code. you can change width and height of dialogue box by setting insetPadding, because it taking default padding so we need to change like this.
showDialog(
context: context,
builder: (_) =>
Dialog(
insetPadding: EdgeInsets.symmetric(horizontal: 2.0, vertical: 2.0),
backgroundColor: Colors.transparent,
child: Container(
width: double.infinity,
height: MediaQuery.of(context).size.height*0.7 ,
decoration: BoxDecoration(
color: Colors.grey[900],
),
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
GestureDetector(
onTap: (){
Navigator.pop(context);
},
child: Icon(Icons.close,color: Colors.grey,)),
],
),
),
Text("select your avatar",style: TextStyle(color: white,fontWeight: FontWeight.bold),),
],
),
),
),
);
:
return Dialog(
backgroundColor: Colors.white,
insetPadding: EdgeInsets.all(10.0),
child: Container(
width: double.infinity,
use insetpadding where you are returning Dialog and give it a double value, For my case, i gave it a 10.0
insetPadding: EdgeInsets.all(10.0), you can give it a custom height
Hello you can actually use insetPadding and use a column inside content that will contain a SizedBox(width:MediaQuery.of(context).size.width).The only difference is that I used AlertDialog. Bellow is the way it worked for me. You can set dialog width by changing padding inside insetPadding. Hope i helped :).
dialog(){
TextEditingController controller = TextEditingController();
return showDialog(
context: context,
barrierDismissible: true,
builder: (_) => AlertDialog(
insetPadding: EdgeInsets.symmetric(
horizontal: MediaQuery.of(context).size.width * 0.08),
content: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
SizedBox(
height: 16,
width: MediaQuery.of(context).size.width,
),
Text(
'Hello',
),
SizedBox(
height: 15,
),
Text(
'Description',
),
TextField(
controller: controller,
style: TextStyle(
color: Colors.black,
),
),
],
),
),
actions: [
FlatButton(
child: Text("Close"),
onPressed: () {
Navigator.of(context).pop();
},
),
],
),
);
}
This is how it looks like
https://i.stack.imgur.com/bvKpP.png
Add InsetPadding property like this
insetPadding: EdgeInsets.zero
AlertDialog(
title: Center(child: Text("$title")),
------------------------->Here we added the property
insetPadding: EdgeInsets.zero,
titlePadding: EdgeInsets.only(top: 14.0, bottom: 4),
content: Container(
height: 50,
child: TextFormField(
controller: find_controller,
decoration: InputDecoration(
suffixIcon: context.watch<MediaProvider>().isChangeDialog
? IconButton(
onPressed: () {
clearController(find_controller);
},
icon: Icon(Icons.clear))
: null,
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.deepPurpleAccent)),
hintText: 'Id',
),
onChanged: (val) {
if (val.isNotEmpty)
context.read<MediaProvider>().isChangeDialog = true;
else
context.read<MediaProvider>().isChangeDialog = false;
},
),
),
actions: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(4.0),
child: OutlinedButton(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Align(
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 12.0),
child: Icon(Icons.clear),
),
),
Text("Cancel")
],
),
onPressed: () {
context.read<MediaProvider>().isChangeDialog = false;
Navigator.of(context).pop();
}),
),
Padding(
padding: const EdgeInsets.all(4.0),
child: ElevatedButton(
onPressed: context.watch<MediaProvider>().isChangeDialog
? () {
context.read<MediaProvider>().isChangeDialog = false;
okCallback;
}
: null,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Align(
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 12.0),
child: Icon(Icons.check),
),
),
Text("OK")
],
)),
)
],
),
],
);
Before
After
The solution that worked for me.
Set the insetPadding of the AlertDialog.
Plus, wrap the content in a SizedBox and set the width to MediaQuery.of(context).size.width.
return AlertDialog(
content: SizedBox(
width: MediaQuery.of(context).size.width,
child: const Text("Content"),
),
insetPadding: const EdgeInsets.all(10),
);
Setting just the insetPadding alone does not work.
return Dialog(
insetPadding: EdgeInsets.symmetric(
horizontal: X,
),
);
I found the simplest way... just add insetPadding: EdgeInsets.zero, and it will expand to max size width:
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Center(child: Text("Send Message", style: TextStyle(
color: Colors.white, fontWeight: FontWeight.bold),)),
backgroundColor: Colors.indigo[700],
insetPadding: EdgeInsets.zero,
content:
As a workaround, you can play with the dialog title, in most cases the dialog will expand horizontally to accommodate the title. So you can create big title to make sure the dialog will take max width. Obviously you can't just put long title, but you can build your title of two text widgets, where one of them has text color matching background. For the case where no title should be shown:
showDialog(
context: context,
builder: (_) =>
new AlertDialog(
title: Text('hidden title, just set font text to the same as background.',
style: TextStyle(color: Colors.white)),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10.0))
),
content: ProductPreviewScreen(),
)
);
I am using get package and it is wonderful. use its dialog, easily sizable
Get.generalDialog(pageBuilder: (BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation,) {
return SimpleDialog(
shape: RoundedRectangleBorder( borderRadius: BorderRadius.circular(Constants.padding), ),
elevation: 0, backgroundColor: Colors.transparent,
children: [Center(child: Stack(
children: <Widget>[
Container(width: Get.width * 0.95,
padding: const EdgeInsets.only(left: Constants.padding,top: Constants.avatarRadius
+ Constants.padding, right: Constants.padding,bottom: Constants.padding
),
margin: const EdgeInsets.only(top: Constants.avatarRadius),
decoration: BoxDecoration(
shape: BoxShape.rectangle,
color: Get.theme.scaffoldBackgroundColor,
borderRadius: BorderRadius.circular(Constants.padding),
boxShadow: const [
BoxShadow(color: Colors.black,offset: Offset(0,10), blurRadius: 10 ),
]
),
child: Text('body'),
),
Positioned(
left: Constants.padding, right: Constants.padding,
child: CircleAvatar(
backgroundColor: Colors.blueAccent, radius: Constants.avatarRadius,
child: ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(Constants.avatarRadius)),
child: Icon(Icons.done, size: 24, color: Colors.white,)
),
),
),
Positioned(
left: 0,
//right: Constants.padding,
child: CircleAvatar(
backgroundColor: Colors.blueAccent, radius: Constants.avatarRadius,
child: ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(Constants.avatarRadius)),
child: InkWell(child: const Icon(Icons.close, size: 24, color: Colors.white,), onTap: (){Get.back();},)
),
),
),
],
))],
);
}, barrierDismissible: true, barrierLabel: '');
Use width: MediaQuery.of(context).size.width to increase width of the alert
Example:
return AlertDialog(
title: Text("Select Birth Date"),
content: Container(
width: MediaQuery.of(context).size.width,
height: 300,
child: CupertinoDatePicker(
mode: CupertinoDatePickerMode.date,
initialDateTime: DateTime(1969, 1, 1),
onDateTimeChanged: (DateTime newDateTime) {
// Do something
},
),
),
actions: <Widget>[
FlatButton(
child: Text("Select"),
onPressed: () {
widget.onSelected(selectedDate);
Navigator.pop(context);
//.....
},
),
],
);
/// this works for me paste your body and see result
Future _showDialog() async {
return showDialog(
context: context,
barrierDismissible: true,
builder: (BuildContext context) {
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Material(
color: Colors.transparent,
child: Container(
padding: EdgeInsets.fromLTRB(5, 10, 5, 10),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(5),
),
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
margin: EdgeInsets.all(10),
/// paste your item body
child:body,
),
),
],
),
);
},
);
}
In my case, I was using listview inside the dialog box so I was not using
shrink wrap inside ListView hopes this will help someone.
ListView.builder(
shrinkWrap : true...
...
};
Related
I want to have a modal bottom sheet that I can scroll through as normal without closing the modal bottom sheet. Then, when I'm at the top of my list, I want to be able to close the Modal Bottom Sheet with a scroll gesture.
I would like to add the YouTube style modal bottom sheet shown in the video to my app, but unfortunately I don't know how to do it.
This is the link to the video that shows what I mean: https://drive.google.com/file/d/1977Ptq4Sox6WKGQkiTbCH_zydn8Mu05o/view?usp=sharing
This is inside my Profile Screen:
#override
Widget build(BuildContext context) {
return Material(
color: Colors.transparent,
child: Container(
height: MediaQuery.of(context).size.height * 0.95,
margin: EdgeInsets.only(bottom: 5, left: 10, right: 10),
decoration: BoxDecoration(
border: Border.all(color: Colors.black, width: 1.5),
borderRadius: BorderRadius.circular(25),
color: Colors.white,
),
child: ClipRRect(
borderRadius: BorderRadius.circular(23),
child: DraggableScrollableSheet(
initialChildSize: 1,
minChildSize: 0.5,
maxChildSize: 1,
expand: false,
builder: (BuildContext context, ScrollController _scrollController) {
return SingleChildScrollView(
controller: _scrollController,
child: Column(
children: [
Container(
height: 590,
decoration: BoxDecoration(
border: Border(
bottom: BorderSide(width: 1.5, color:
Colors.black),
),
color: Colors.white,
),
child: Stack(
children: [
InteractiveViewer(
transformationController:
_zoomProfilePictureController,
minScale: 1,
maxScale: 3,
onInteractionEnd: (ScaleEndDetails endDetails) {
setState(() {
_zoomProfilePictureController.value =
Matrix4.identity();
});
},
child: Swiper(
physics: NeverScrollableScrollPhysics(),
itemBuilder:
(BuildContext context, int imageIndex) {
return Hero(
tag: "Profile",
child: CachedNetworkImage(
imageUrl: widget.user.imageUrl[imageIndex],
fit: BoxFit.cover,
useOldImageOnUrlChange: true,
placeholder: (context, url) => Center(
child: CircularProgressIndicator(
strokeWidth: 3,
valueColor: AlwaysStoppedAnimation<Color>(
primaryColor.withOpacity(0.7),
),
),
),
errorWidget: (context, url, error) => Icon(
Icons.error_outline,
size: 30,
color: Colors.red,
),
),
);
},
itemCount: widget.user.imageUrl.length,
pagination: SwiperPagination(
alignment: Alignment.topCenter,
margin: EdgeInsets.all(0),
builder: DotSwiperPaginationBuilder(
color: Colors.white.withOpacity(0.7),
size: 8,
activeColor: widget.user.imageUrl.length > 1
? primaryColor
: Colors.transparent,
activeSize: 10,
),
),
control: widget.user.imageUrl.length > 1
? SwiperControl(
padding: const EdgeInsets.only(top: 250),
color: Colors.transparent,
disableColor: Colors.transparent,
size: 228,
)
: null,
loop: false,
),
),
This is how I call the BottomSheet:
ListTile(
onTap: () => showModalBottomSheet(
backgroundColor: Colors.transparent,
context: context,
builder: (context) {
return ProfileInformationHomeScreen(
secondUser,
widget.currentUser,
);
},
),
it's DraggableScrollableSheet.
create a widget for bottomSheet.
#override
Widget build(BuildContext context) {
return ClipRRect(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(12),
topRight: Radius.circular(12),
),
child: DraggableScrollableSheet(
///* it will be always visible 95% of screen,
///* if we drag down at 50% it will close the sheet
initialChildSize: 0.95,
minChildSize: 0.5,
maxChildSize: .95,
expand: false,
builder: (BuildContext context, c) {
return Container(
color: Colors.white,
child: ListView(
controller: c,
children: [
/// your widgets
call a method to showModalBottomSheet.
_showBottomSheet(BuildContext context) {
showModalBottomSheet(
context: context,
isScrollControlled: true,
backgroundColor: Colors.transparent,
builder: (context) => DestinationBottomSheetWidget(),
);
}
To close the buttomSheet you can drag or use a button inside DraggableScrollableSheet builder and use Navigator.of(context).pop().
I do like this and add item of ListView
/// heading
Padding(
padding: EdgeInsets.only(
left: 20,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
GestureDetector(
onTap: () => Navigator.of(context).pop(),
child: Icon(
Icons.close,
color: Colors.grey,
),
),
Text(
"Title",
textAlign: TextAlign.center,
),
///* this empty widget will handle the spaces
Icon(
Icons.close,
color: Colors.grey.withOpacity(0.0),
),
],
),
),
for more flutter doc youtube
In my design, there is a close button in the BottomSheet. I have tried Stack. But it didn't work. Does anyone know how to achieve the result? Thanks :)
modalBottomSheet(context) {
return showModalBottomSheet(
context: context,
builder: (context) {
return Stack(
children: [
Container(
child: Text('Sample Text'),
),
Container(
height: 50,
width: 50,
decoration: BoxDecoration(
color: Colors.red,
shape: BoxShape.circle,
),
),
],
);
}
);
}
So I've been trying around for a bit, and this seems to work as you explained.
modalBottomSheet(context) {
return showModalBottomSheet(
context: context,
builder: (context) {
// using a scaffold helps to more easily position the FAB
return Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
SizedBox(
width: double.maxFinite,
),
Padding(
padding: EdgeInsets.all(30.0),
child: Text("Text in the sheet"),
),
],
),
// translate the FAB up by 30
floatingActionButton: Container(
transform: Matrix4.translationValues(0.0, -30, 0.0), // translate up by 30
child: FloatingActionButton(
onPressed: () {
// do stuff
print('doing stuff');
},
child: Icon(Icons.add),
),
),
// dock it to the center top (from which it is translated)
floatingActionButtonLocation: FloatingActionButtonLocation.centerTop,
);
});
}
The meat of the solution here is to transform the Container which contains the FAB. I got this idea from this older SO answer to a somewhat related question.
The result looks like this:
You'll probably have to make some more edits to achieve the exact result you desire, but I hope this sets you on the right path.
Edit
When, in the above solution, you want to press the FAB, and you tap the top half, the onPressed handler fires, but the modal also closes. You should probably use a WillPopScope that only pops when the actual button is pressed (and not the area around/above it). If you think it's fine pressing anywhere above it as well, you can just leave it as-is.
showModalBottomSheet(
backgroundColor: Colors.transparent,
context: context,
builder: (BuildContext context) {
return Stack(clipBehavior: Clip.none, children: [
Container(
decoration: const BoxDecoration(
color: Colors.white,
borderRadius:
BorderRadius.vertical(top: Radius.circular(20))),
height: 220.h,
child: Padding(
padding: const EdgeInsets.symmetric(
horizontal: 10.0, vertical: 16),
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
ElevatedButton(
color: Colors.green,
onPressed: () {},
child: const Center(child: Text('Remove')))
],
),
),
),
),
Positioned(
top: -30.h,
right: 12.w,
child: FloatingActionButton(
onPressed: () {},
child: const Icon(Icons.close),
)),
]);
},
)
Here's the widget I'm using in the appBar;
appBar: AppBar(actions: <Widget>[myAppBarIcon()],)
And the code for the widget itself;
Widget myAppBarIcon() {
return ValueListenableBuilder(
builder: (BuildContext context, int newNotificationCounterValue,
Widget child) {
return newNotificationCounterValue == 0? Container(): Stack(
children: [
Icon(
Icons.notifications,
color: Colors.white,
size: 30,
),
Container(
width: 30,
height: 30,
child: Container(
width: 15,
height: 15,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Color(0xffc32c37),
border: Border.all(color: Colors.white, width: 1)),
child: Padding(
padding: const EdgeInsets.all(0.0),
child: Text(
newNotificationCounterValue.toString(),
),
),
),
),
],
);
},
valueListenable: notificationCounterValueNotifer,
);
}
But I would now like to use the widget in a floating action button instead of the appBar. So here's what I tried;
Scaffold(
body: FoldableSidebarBuilder(
drawerBackgroundColor: Colors.black45,
drawer: CustomDrawer(closeDrawer: (){
setState(() {
drawerStatus = FSBStatus.FSB_CLOSE;
});
},),
screenContents: mainStage(),
status: drawerStatus,
),
floatingActionButton: Stack(
children: <Widget>[
Positioned(
bottom:140,
left: 17,
child: FloatingActionButton(
mini: true,
heroTag: null,
backgroundColor: Colors.black12,
child: myAppBarIcon()
),
),
],
),
),
But although no error comes up, myAppBarIcon isn't appearing in the build. Where did I go wrong?
Turns out it does work. I didn't think so at first till I realized I needed to receive an FCM notification before it appeared. This line was the reason.;
return newNotificationCounterValue == 0? Container()
So I'm going to put an empty notification icon in the container.
I'm trying to create a listview of cards whose images get displayed in the listview only if the card is selected. The selection widget is the PopupSubscription() where I'm choosing which cards (SubscriptionCard) to display by setting the bool of that particular image to be true. But when the selections are applied, the selected images don't appear immediately even after doing setState().
However, they do appear when I switch tabs and return the screen again. What should I do in order to change the state of an object that's not in my current state class? I tried using Provider but it left me confused as to what I'm supposed to do.
This is the SubscriptionCard where the bool is set on tapping it:
return InkWell(
radius: 1.0,
borderRadius: BorderRadius.circular(8.0),
highlightColor: buttonBackground,
onTap: () {
setState(() {
widget.currentSubscription.selected = !widget.currentSubscription.selected;
});
},
child: Card(
elevation: 1.0,
borderOnForeground: true,
shape: widget.currentSubscription.selected ? RoundedRectangleBorder(
borderRadius: BorderRadius.circular(3.0),
side: BorderSide(color: buttonBackground, width: 2.0),
) : ContinuousRectangleBorder(),
color: bgDarkColor,
child: SizedBox(
width: SizeConfig.blockSizeHorizontal * 30,
child: Stack(
alignment: Alignment.topRight,
children: [
Row(
mainAxisSize: MainAxisSize.max,
children: [
Image.asset(this.widget.currentSubscription.logo, height: 35.0,),
Text(
' ${this.widget.currentSubscription.name}',
style: TextStyle(fontFamily: 'Muli', fontSize: 16.0)
),
],
),
widget.currentSubscription.selected ? Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
color: buttonBackground,
),
child: Padding(
padding: const EdgeInsets.all(2.0),
child: Icon(
Icons.check,
size: 10.0,
color: Colors.white,
),
),
) : Container()
],
),
),
),
);
This is the ListView where the selected cards' images are rendered:
Container(
height: 50,
width: 350,
child: ListView(
scrollDirection: Axis.horizontal,
children: [
IconButton(
onPressed: () {
showDialog(
context: context,
builder: (BuildContext context) {
return PopupSubscription();
}
);
},
icon: Icon(Icons.add_box_rounded, size: 30.0,),
),
StatefulBuilder(
builder: (context, setState) {
return ListView.builder(
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemCount: subscriptionsList.length,
itemBuilder: (context, index) {
return Container(
margin: EdgeInsets.symmetric(horizontal: 5.0),
child: ClipRRect(
borderRadius: BorderRadius.circular(25.0),
child: Image.asset(
subscriptionsList[index].selected ? subscriptionsList[index].logo
: "assets/elements/streaming-services/netflix.jpeg",
),
),
);
},
);
}
),
],
)
),
Based on your current code, I'm guessing you've added the currentSubscription variable as final in the StatefulWidget above the actual State, like:
class MyClass extends StatefulWidget{
final currentSubscription;
// Rest of the code
}
class _MyClassState extends State<MyClass> {
// Your ListView Code and other stuff.
}
This wont work when you want to change the state onTap, I recommend making the variable you use in setState within the _MyClassState class and use setState in that. Something like:
class _MyClassState extends State<MyClass> {
bool _isSelected = false;
// And in your onTap method, something like:
setState(() {
_isSelected = !_isSelected;
});
}
I want the bottom sheet to look like the one in Angular Material.
The sheet instead expands to the maximum width. The problem is that I cannot configure the width of the bottom sheet.
It currently looks like this
My code looks like this:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
debugShowCheckedModeBanner: false,
home: Scaffold(
body: ...,
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add),
tooltip: 'Add File',
onPressed: () => showModalBottomSheet(
context: context,
builder: (context) => AddFileBottomSheet(),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
),
),
// backgroundColor: Colors.transparent,
isScrollControlled: true,
),
),
),
);
}
}
class AddFileBottomSheet extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
padding: EdgeInsets.symmetric(vertical: 20, horizontal: 5),
alignment: Alignment.center,
child: Text(
'Create New File',
style: Theme.of(context).textTheme.headline5,
),
),
GridView.count(
shrinkWrap: true,
crossAxisCount: 3,
children: [
_gridTile(
context: context,
icon: Icon(Icons.file_upload),
text: 'Upload File',
callback: () => print('lel'),
),
_gridTile(
context: context,
icon: Icon(Icons.create),
text: 'Create Text File',
callback: () => print('lel'),
),
],
),
],
);
}
Widget _gridTile({
#required BuildContext context,
#required Icon icon,
#required String text,
#required void callback(),
}) {
return InkWell(
onTap: () => callback(),
child: Container(
padding: EdgeInsets.all(15),
alignment: Alignment.center,
height: double.infinity,
width: double.infinity,
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
icon,
Text(text, style: Theme.of(context).textTheme.subtitle2),
],
),
),
);
}
}
I know I can fake it having a smaller width when making some of it transparent, but I have round edges and they won't get preserved.
Workaround #1
I managed to do it by changing the canvasColor to transparent and making the borders rounded in the widget:
This way, however I need to do additional logic to dismiss it when the user clicks the fake transparent area.
First add the canvasColor to the context somehow:
...
floatingActionButton: Theme(
data: Theme.of(context).copyWith(canvasColor: Colors.transparent),
child: Builder(
builder: (context) => FloatingActionButton(
child: Icon(Icons.add),
tooltip: 'Add File',
onPressed: () => showModalBottomSheet(
context: context,
builder: (context) => AddFileBottomSheet(),
// shape: RoundedRectangleBorder(
// borderRadius: BorderRadius.only(
// topLeft: Radius.circular(10),
// topRight: Radius.circular(10),
// ),
// ),
// backgroundColor: Colors.transparent,
isScrollControlled: true,
),
),
),
),
...
Then fake the width
return Container(
padding: EdgeInsets.symmetric(horizontal: 300),
child: Container(
decoration: BoxDecoration(
color: Colors.white,
shape: BoxShape.rectangle,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
),
),
// backgroundColor: Colors.transparent,
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
padding: EdgeInsets.symmetric(vertical: 20, horizontal: 5),
alignment: Alignment.center,
child: Text(
'Create New File',
style: Theme.of(context).textTheme.headline5,
),
),
GridView.count(
shrinkWrap: true,
crossAxisCount: 3,
children: [
_gridTile(
context: context,
icon: Icon(Icons.file_upload),
text: 'Upload File',
callback: () => print('lel'),
),
_gridTile(
context: context,
icon: Icon(Icons.create),
text: 'Create Text File',
callback: () => print('lel'),
),
],
),
],
),
),
);
I wonder if there is a standard approach to this and I need your help. I tried making a DartPad example, but it gives me Script error.
My idea was to try and make it mobile friendly with something like this:
final isMobile = MediaQuery.of(context).size.width < 700;
return Container(
padding: EdgeInsets.symmetric(horizontal: isMobile ? 0: 300),
child: ...
)
This will make it full-width when mobile and with some padding when desktop.
UPDATE
: Flutter now support constraints property in showModalBottomSheet
showModalBottomSheet(
context: context,
constraints: BoxConstraints(
maxWidth: Responsive.isMobile(context) ? Get.width : 600,
),
builder: ...
),
UPDATE
Flutter added constraints to showModalBottomSheet and it's available on master, dev and beta :)
You can wrap your widget with an Align widget and set the alignment to bottom center, then you can set box constraints if you want to have a maximum width
Align(
alignment: Alignment.bottomCenter,
child: ConstrainedBox(
constraints: BoxConstraints(...),
child: ...
),
)