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I want to utilize a modal bottom sheet for data entry. I don't want the user to be able to dismiss it by just touching outside the sheet. This article describes how to do it in Android native.
https://medium.com/#betakuang/make-your-bottomsheetdialog-noncancelable-e50a070cdf07
How can I do this with the flutter widget?
Here
setting enableDrag false disables dragging of bottom sheet
setting isDismissable false disables on cancel on outside touch
returning empty on onWillPop overrides back button so user can't go back using back button
showModalBottomSheet(
enableDrag: false,
isDismissible: false,
context: context,
builder: (context) {
return WillPopScope(
onWillPop: () {},
child: Container());
});
The alternative to a modal BottomSheet is a persistent BottomSheet.
The only change you need to make is changing showModalBottomSheet to showBottomSheet.
The persistent BottomSheet can still be dismissed by e.g. pressing the back button on Android. This is nice behavior, as in it is Material behavior.
this practice worked for me!!
showModalBottomSheet(
isDismissible: false, // <--- this line
clipBehavior: ,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25.0), topRight: Radius.circular(25.0)),
),
context: context,
builder: (builder) {
return Container(
child: Column(children: <Widget>[
SizedBox(height: 250,)
]),
);
});
Related
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I'm currently using the marker cmponent like this:
const [markers, setMarkers] = React.useState([]);
This is inside the return GoogleMap component
{markers.map((marker) => (
<Marker
key={marker.time.toISOString}
position={{ lat: marker.lat, lng: marker.lng }}
onClick={() => {
setSelected(marker);
}}
icon={{
url: `/greenMarker.png`,
origin: new window.google.maps.Point(0, 0),
anchor: new window.google.maps.Point(15, 15),
scaledSize: new window.google.maps.Size(30, 40),
}}
/>
))}
currently created it so the user can set their own markers onClick within the map. I will keep this functionality but try to have other markers onload for places with recycle in the name
I need to achieve, using flutter, a layout like the following but I am not capable of it. I have worked with the expanded and the Column MainAxisAlignment but can't solve.
I attach images of the layout I want to achieve:
I am also attaching the code (without padding):
Expanded(
child: Container(
color: Colors.red,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
// Row "Chat salvate"
// Fist card
// Second card
// Third card
]),
),
),
// Button
I have created an example UI in DartPad with the same design you are trying to implement.
Check it out here.
I have built a native Android App which has a transparent navigation drawer. I have been asked to build the same app using Flutter and I have gotten to the point where I would like to implement a transparent navigation drawer. How do I make the Navigation Drawer of my Flutter app transparent because I have been struggling on that end ? I have already tried
drawer: Drawer(
child: Container(
color: Colors.transparent,)),
The navigation drawer just remains white. I have been searching for a solution to this and cant find one. Any help would be appreciated.
I have attached images of the Native App with a transparent drawer and the Flutter version with a white Navigation drawer
I think there's a better way of doing this without messing up the entire canvases on the app. Since you want it specifically for the drawer, try this approach.
Scaffold(
drawer: Theme(
data: Theme.of(context).copyWith(
// Set the transparency here
canvasColor: Colors.transparent, //or any other color you want. e.g Colors.blue.withOpacity(0.5)
),
child: Drawer(
// All other codes goes here.
)
)
);
use the transparent color like you are currently doing but also in the drawer widget use a stack and inside it make the first widget a backdropfilter, you will need to import dart:ui. here is an example
//import this library to use the gaussian blur background
import 'dart:ui';
Scaffold(
appBar: AppBar(
title: Text('Title'),
),
drawer: Theme(
data: Theme.of(context).copyWith(canvasColor: Colors.transparent),
child: sideNav()),
body: Text('Hello Body'),
),
Drawer sideNav(){
return Drawer(
child: Stack(
children: <Widget> [
//first child be the blur background
BackdropFilter(
filter: ImageFilter.blur(sigmaX: 5.0, sigmaY: 5.0), //this is dependent on the import statment above
child: Container(
decoration: BoxDecoration(color: Color.grey.withOpacity(0.5))
)
),
ListView(
padding: EdgeInsets.zero,
children: <Widget>[
DrawerHeader(
child: Text('Hello Drawer Title')
),
ListTitle(
leading: Icon(Icons.dashboard, color: Colors.white)
title: "Dashboard"
onTap: (){
}
)
]
)
]
)
);
}
After much tinkering around I managed to find a solution.
I edited the ThemeData and added a canvas color as described below
theme: new ThemeData(
canvasColor: Colors.transparent
),
This isn't the best way to do this, it is more of a workaround than anything.
Visual Representation
Screenshot Of drawer top whitespace
If you came here and finding the solution about how to remove the white space above the drawer and status bar then just simply use SingleChildScrollView ---> Column().
Because if you add something like ListView() then the white Space will take place above your drawer which is so irritating to see.
I know this is not the actual solution of this problem but it will help someone who needs it.
Just wrap the drawer with opacity and give the opacity a value (between 0 and 1)
Opacity(
opacity: 0.7,
child: Drawer(//your drawer here),
),
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I want to achieve blur background behind dialog on SimpleDialog class. What I'm looking for is something similar to this, but for flutter.
Github Android project
EDIT:
I already checked this question, but this is about the Dialog, I want to implement it on SimpleDialog.
Just wrap your Dialog inside BackdropFilter
return new BackdropFilter(
filter: ImageFilter.blur(sigmaX: 10, sigmaY: 10),
child: Dialog(
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15.0)),
backgroundColor: Color(ColorResources.BLACK_ALPHA_65),
child: _dialogContent(),
)
);
Widget _dialogContent() {}//Your dialog view
I implemented blured background with showGeneralDialog method to make a blur transition as smooth as possible. Here is an example:
showGeneralDialog(
barrierDismissible: true,
barrierLabel: '',
barrierColor: Colors.black38,
transitionDuration: Duration(milliseconds: 500),
pageBuilder: (ctx, anim1, anim2) => AlertDialog(
title: Text('blured background'),
content: Text('background should be blured and little bit darker '),
elevation: 2,
actions: [
FlatButton(
child: Text('OK'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
),
transitionBuilder: (ctx, anim1, anim2, child) => BackdropFilter(
filter: ImageFilter.blur(sigmaX: 4 * anim1.value, sigmaY: 4 * anim1.value),
child: FadeTransition(
child: child,
opacity: anim1,
),
),
context: context,
);
In flutter, The dimming effect behind the dialog and bottom sheets is done using a class named 'ModalBarrier'. So what you can do is just modify the code where it dims the background.
You can easily search the file in 'IntelliJ' by using the shortcut 'Double shift'
First, you need to
import 'dart:ui' show ImageFilter;
Then in the build method change (Line: 96)
child: color == null ? null : DecoratedBox(
decoration: BoxDecoration(
color: color,
),
),
into
child: color == null ? null : BackdropFilter(
filter: new ImageFilter.blur(sigmaX: 3, sigmaY: 3),
child: Container(color: Color(0x01000000)),
),
You can change the value of 'sigma' as per your usecase.
Screenshot : Blurred Dialog
try implementing this code
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
fit: StackFit.expand,
children: <Widget>[
Image.asset('asset url', fit: BoxFit.cover),
blur(),
],
),
),
],
),
);
}
Widget blur(){
if(
//dialog pops up or is active
){
return BackdropFilter(
filter: ImageFilter.blur(sigmaX:5.0,sigmaY:5.0),
);
}
else{
return Image.asset('asset url', fit: BoxFit.cover);////if dialog not active returns an unfiltered image
}
}
I just have a simple Card like new Card(child: new Text('My cool card')) and I want to be able to click anywhere on it to run some function, except there's no onPressed method for a Card. I could add a button to the bottom, but that's not ideal for this situation.
Anyone know how to make the whole card clickable?
Flutter use composition over properties.
Wrap the desired widget into a clickable one to achieve what you need.
Some clickable widgets : GestureDetector, InkWell, InkResponse.
GestureDetector(
onTap: () => ......,
child: Card(...),
);
Flutter provides the InkWell Widget. by registering a callback you can decide what happens when user clicks on the card (called tap in flutter). InkWell also implements Material Design ripple effect
Card(
child: new InkWell(
onTap: () {
print("tapped");
},
child: Container(
width: 100.0,
height: 100.0,
),
),
),
I think you can also use InkWell apart from GestureDetector just wrap the card inside InkWell() Widget
InkWell(
onTap: (){ print("Card Clicked"); }
child: new Card(),
);
You can use Inkwell and insert splashColor which, at the click of the user, creates the rebound effect with the chosen color, on the card ..
This is mainly used in material design.
return Card(
color: item.completed ? Colors.white70 : Colors.white,
elevation: 8,
child: InkWell(
splashColor: "Insert color when user tap on card",
onTap: () async {
},
),
);
Wrap a card in GestureDetector Widget like a below:
GestureDetector(
onTap: () {
// To do
},
child: Card(
),
),
Another way is as follows:
InkWell(
onTap: () {
// To do
},
child: Card(),
),
In Flutter, InkWell is a material widget that responds to touch action.
InkWell(
child: Card(......),
onTap: () {
print("Click event on Container");
},
);
GestureDetector is a widget that detects the gestures.
GestureDetector(
onTap: () {
print("Click event on Container");
},
child: Card(.......),
)
Difference
InkWell is a material widget and it can show you a Ripple Effect whenever a touch was received.
GestureDetector is more general-purpose, not only for touch but also for other gestures.
The most preferred way is to add ListTile as Card child. Not only does ListTile contain the method onTap it also helps you in making Card interesting.
Card(
child: ListTile(
title: Text('Title')
leading: CircleAvatar(
backgroundImage: AssetImage('assets/images/test.jpg'),
),
onTap: () {
print('Card Clicked');
},
),
),
You also can insert a card into a TextButton:
TextButton clickableCard = TextButton(child: card, onPressed: onCardClick, style: [...]);
This brings the advantage, that you get some features for free. For example in Flutter Web, you get a mousover effect and the cursor changes to the hand so that ths user knows, he can click there. Other additional features can be customised using the style.
Do something on tap/click of 'child' in Flutter:-
Code:-your code looks like:
child: Card(------
------------
--------),
Step1:- Put your mouse cursor on Card then, press- Alt+Enter(in windows) select wrap with widget.
Step2:- Change your default widget into GestureDetector.
final code:-
child: GestureDetector(
onTap: YourOnClickCode(),
child: Card(------
------------
--------),
),
Most of the answers are brilliant but I just want to share mine for the one who wants to make/show a ripple effect on Tap of card or list tile.
Card(
child: TextButton(
onPressed: ()=> ...,
child: ListTile(
title: Text('title'),
),
),
);