i am created an SVG image for background, but it is loaded after some time, the issue is:
when it is not loaded yet all widgets appears randomly. i just need a loader after the image loaded it page widget appears.
the code is:
Scaffold(
appBar: const _CustomNotificationAppBar(),
body: isFinished
? SingleChildScrollView(
child: Stack(
children: [
//notification background
Opacity(
opacity: 0.42,
child: SvgPicture.asset(
'assets/images/notification_background.svg',
),
),
IconButton(
icon: const Icon(
Icons.notifications_active_outlined,
),
onPressed: () {})),
],
),
)
: const Center(
child: CircularProgressIndicator(),
),
);
well if I understands you well and as long as your SVG is loading from the device "asset",
there should not be delay in first place.
I think the problem is you emulator or physical device is too slow , And you may face this problem in debug only
try to run flutter build APK and install that generated APK in your phone and check if problem remains.
however you can achieve that also like this
SvgPicture.asset(
'assets/images/notification_background.svg',
placeholderBuilder: (context) => Text("I am Loading"),
),
You can wrap it in a Container, and it will work.
For eg:
Container(
//height :desired height,
//width : desired width
child: Opacity(
opacity: 0.42,
child: SvgPicture.asset(
'assets/images/notification_background.svg',
),
))
You can pass a placeholderBuilder to your SvgPicture.asset like this:
SvgPicture.asset(
'assets/images/notification_background.svg',
placeholderBuilder: (context) => Icon(Icons.your_desired_icon),
),
You can also wrap the Icon with a SizedBox if you need to comply with a certain size, or replace it by any other widget that you wish.
More info about the widget you're using is available in its API docs.
Related
I developed a flutter web application that has google map widget as a part of Scaffold body. I use flutter_speed_dial as a floating action button. When I click on SpeedDial, it shows an overlay on whole screen, but the map is still clickable.
I know it is happened because google map use HtmlElementView in web and we have a pointer_interceptor package to prevent triggering map when click on above buttons. But how about the overlays? there is no place to wrap SpeedDial overlay with pointer_interceptor.
Here is my sample code:
Scaffold(
...
body: Column(
children: [
...
SizedBox(
height: 230,
child: GoogleMap(...)),
...
]
),
floatingActionButton: PointerInterceptor(
child: SpeedDial(
...
childPadding: const EdgeInsets.all(5),
spaceBetweenChildren: 1,
isOpenOnStart: false,
children: [
SpeedDialChild(
onTap: () {
...
},
labelWidget: PointerInterceptor(
child: Card(
...
),
),
),
],
),
),
)
I believe you can Solve your problem by using IgnorePointer.
Wrap a widget with IgnorePointer and set it to true.
IgnorePointer(
ignoring: true,
child: Widget _test(),
),
you can take a look at docs here:
https://api.flutter.dev/flutter/widgets/IgnorePointer-class.html
I'm making a learning app with flutter.
In our app, you have to put a button over the picture.
So, using positioned on the picture, I made it like the picture below.
#override
Widget build(BuildContext context){
return Scaffold(
backgroundColor: Colors.white,
body: Stack(
fit: StackFit.expand,
children: <Widget>[
Image(
image: AssetImage("assets/oral_structure.png"),
fit: BoxFit.fitWidth
),
Positioned(
top:385, left:17,
child: FlatButton(
child: Text('ㅂ', style: TextStyle(fontSize: 30,fontWeight: FontWeight.bold)),
shape: CircleBorder(),
onPressed: (){
Navigator.push(context, MaterialPageRoute(builder: (context) => B()),);
},
)
),//ㅂ
However, the problem with this is that the position of the buttons changes when using a phone with a large screen.
What can be done to prevent this?
The button seems always in the same place. It should be independent of screen size.
I suspect your problem is rather with the fontSize of the text.
Try to remove the fontSize:, it should fix your problem
EDIT 1:
the problem is with fit: StackFit.expand, that forces the button to expand. You can keep it but wrap your button inside a SizedBox
const SizedBox(
width: 200.0,
height: 100.0,
child: FlatButton(// your code here...),
)
Try to get the width and height of screen, and calculate base on that with a radio.
So I'm searching for a Menu often found in a Settings Screen. It's used to select a Setting.
It opens when you press on a ListTile and then it fills the mayority of the Screen, while the borders are transparent. In the menu you have to select one of the options.
An example usecase of that would be to select a Language(onTap of the ListTile opens a Menu where you can select between all the avaliable languages)
It is similar to that of a PopupMenuButton, however as already mentioned it fills most of the screen, and the individual selectable items have a radiobutton in front of the text(probably RadioListTiles)
I hope someone gets what I'm talking about, because for the past 3 hours I'm searching for this widget but just find articles about the PopupMenuButton over and over.
Edit: I finally found an app that uses the feature I'm looking for
: https://imgur.com/a/A9k71io
By clicking on the first ListTile in the first Picture, the dialog in the second picture opens up.
Hopefully this custom widget is something roughly what you want, try to copy and paste it in your project and play with it.
this is made using the Dialog widget, to exit the Dialog you can tap out of it/ press the device back arrow and I added a small back icon on the top left corner.
tell me if it helped :)
class TestPage extends StatelessWidget {
#override
Widget build(BuildContext context) {
final deviceSize = MediaQuery.of(context).size;// the device size
return Scaffold(
body: Center(
child: ListTile(
tileColor: Colors.grey[300],
title: Text(
'Language',
style: TextStyle(fontSize: 25),
),
onTap: () => showDialog(
context: context,
builder: (context) => Dialog(
insetPadding: EdgeInsets.all(20),
child: Container(
color: Colors.white,
height: deviceSize.height,
width: deviceSize.width,
child: Column(
children: [
Row(
children: [
IconButton(
color: Colors.red,
icon: Icon(Icons.arrow_back),
onPressed: () => Navigator.of(context).pop(),
),
],
),
Spacer(),
Text('Pick A Language'),
Spacer(),
],
),
),
),
),
),
),
);
}
}
I have this image that I would like to display full screen and rotate in the background:
Here it is filling the screen correctly:
The problem is, when it rotates, the sides have been clipped off:
I've tried every type of box fit. I've tried sizing the container width to double.infinity. I've tried wrapping the image in a SingleChildScrollView. I've tried putting overflow: Overflow.visible on the stack. All day trying things, but nothing seems to be working.
The image needs to continuously fill the screen while rotating. How can I code it so that the edges aren't clipped off?
Here's my code:
class FirstScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Stack(
children: <Widget>[
SpinPerfect(
infinite: true,
duration: Duration(seconds: 10),
child: Image.asset(
'assets/images/star-burst.png',
fit: BoxFit.none,
),
),
Container(
child: Center(
child: Text('This is Screen 1'),
),
),
],
),
),
);
}
}
Note: I am currently rotating it using SpinPerfect from the animate_do package, but the same clipping problem happens when using Transform.rotate.
Thanks in advance for any direction!
Here is a solution that works very well:
Use SpinPerfect from the animate_do package (https://pub.dev/packages/animate_do) in combination with the photo_view package (https://pub.dev/packages/photo_view).
SpinPerfect(
infinite: true,
spins: 1,
duration: Duration(seconds: 60),
child: PhotoView(
disableGestures: true,
backgroundDecoration: BoxDecoration(color: Colors.transparent),
initialScale: PhotoViewComputedScale.covered * 2.7,
imageProvider: AssetImage('assets/images/background.jpg'),
),
)
Thanks to the creator of the animate_do package for the idea. (Very cool dude!)
I'm trying to create a navigation drawer in my flutter app,however i want it to have a circle avatar image as icon instead of the default tree horizontal lines. Please is there a way to acheive this?? Any help is appreciated
leading: Builder(
builder: (BuildContext context) {
return IconButton(
// icon: const Icon(Icons.access_alarm_rounded),
icon: Container(
child: Hero(
tag: 'Profile Picture',
child: CircleAvatar(
backgroundImage: NetworkImage(
'googleUserUrl'),
),
),
),
onPressed: () {
Scaffold.of(context).openDrawer();
},
tooltip: MaterialLocalizations.of(context).openAppDrawerTooltip,
);
},
),
You should first google how to achieve this, then try it out yourself. If you encounter errors that you can't resolve by yourself, then you should come here to ask questions.
I will provide you some links or post to help you.
First, follow this post to learn how to add image to your project.
Then, this is the official documents for getting a circle avatar. Also, this is an already answered question about this issue
First of all, there are a lot of resources to help you this you may find out google to achieve this let me share some its up to you what image you want asset_Image or
network_image then you use this image into appbar widget takes action_widget as an argument and then use popupmenuButton and then use clipoval
Example
actions: <Widget>[
PopupMenuButton<String>(
icon: Container(
child: ClipOval(
child: Align(
heightFactor: 1,
widthFactor: 1,
child: Image.network(googleUserUrl),
),
)
),