hey guys I get very upset from this and now I need your help please
I want to add progress bar in list view using flutter I have tried many things but I really don't get it. so please help me with this. and the other thing I want to know that how I make my progress bar working with time and date I mean to say that I get time and date like Microsoft project and I want to show progress according to time and date. soooo please help me guys...
try this
class LoaderList extends StatelessWidget {
const LoaderList({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Scaffold(
body: ListView.builder(itemBuilder: (ctx, index) {
return Container(
color: Colors.amber,
margin: EdgeInsets.all(10),
height: 100,
child: Center(
child: LinearProgressIndicator(
// add value to control the progress
valueColor: AlwaysStoppedAnimation<Color>(Colors.red),
),
),
);
}),
);
}
}
Related
I want to make a widget image if long press it will appear like a page, but if I release it doesn't see like a page anymore,
How to do this in Flutter?
Like a popup menu but if you release it it won't show up.
add InkWell before the image and add in InkWell on long press
then add state less widget preview the image as popup Like this:
InkWell(
onLongPress:(){
Navigator.of(context).push(MaterialPageRoute(builder(context)=>ImageView(img:"url of image"));
} ,
child:Image.network("url of image")
),
and add state less widget to display the image:
class ImageView extends StatelessWidget {
const ImageView( {Key? key, required this.img}) : super(key: key);
final String img;
#override
Widget build(BuildContext context) {
return Scaffold(
body: SingleChildScrollView(
child: Center(
child: InkWell(
onTap: (){
Navigator.pop(context);
},
child: Container(
padding: EdgeInsets.symmetric(vertical: 50),
child: Image.network(img),
),
),
],
),
),
);
}
}
Hi I am a flutter mobile developer and I tried to use this package: https://pub.dev/packages/photo_view/versions for an offline map. I tried zoom and drag and other gestures. It seems working properly for zooming most of the time, but when I tried to drag the picture It has a less than 10 percent success to move it. Here is my code, can somebody help me what coul'd I do wrong? In the package example It seems like It's working properly.
class OfflineMapWidget extends StatefulWidget {
final Session session;
final bool connectedToNetwork;
const OfflineMapWidget(
{Key? key, required this.session, required this.connectedToNetwork})
: super(key: key);
#override
_OfflineMapWidgetState createState() => _OfflineMapWidgetState();
}
class _OfflineMapWidgetState extends State<OfflineMapWidget> {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.black,
child: SafeArea(
child: Theme(
data: ThemeData(
brightness: Brightness.dark,
appBarTheme: AppBarTheme(
backgroundColor: Color.fromARGB(255, 65, 116, 131))),
child: Scaffold(
appBar: AppBar(
leading: MenuWidget(),
actions: [widget.connectedToNetwork ? QrPaymentButton(session: widget.session) : Container()],
),
body: Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
color: Colors.white,
child: PhotoView(
imageProvider: AssetImage('assets/images/offline_map.png'),
),
),
),
),
),
);
}
}
Update: I found the problem. This Widget was in a ZoomDrawer (another pub dev package), and that Widget confused this one, so I need to find another solution. If somebody else uses this 2 package in one the problem is here. The solution is simple, you can disable drag in ZoomDrawer with the disableDragGesture property. If you don't want to disable it on all menu points you can check if you are in the mentioned menu point and disable only when this one is up.I write this one down in the comments as well so it will be more clear.
I found the problem. This Widget was in a ZoomDrawer (another pub dev package), and that Widget confused this one, so I need to find another solution. If somebody else uses this 2 package in one the problem is here. The solution is simple, you can disable drag in ZoomDrawer with the disableDragGesture property. If you don't want to disable it on all menu points you can check if you are in the mentioned menu point and disable only when this one is up.
I'm trying to make an app and I need the help of the community for something: I'm trying to make an overlay (which would be a new page) coming on top of an other page. Look at these screenshots found on dribbble and I'll try to explain better then.
So, imaging you're on the page as shown on the first screenshot. What I want to do is, when you click, for exemple on the "contact page" button, a windows comes up from the bottom of the screen with a linear animation, and show the view, as on the screenshot on the right of the screen. But I don't want it to be a "real new page" because as you can see on the second screenshot, we can see in transparency the first page behind...
And of course, when you click the cross button, the window pop...
Ask me any question if I'm not clear enough.
Any help is welcome !
Thanks a lot, stackoverflow is an extraordinary community !
Here a min example how you can achieve this using AnimatedPositioned widget hoping it will help you get started.
class ExampleApp extends StatefulWidget {
#override
_ExampleAppState createState() => _ExampleAppState();
}
class _ExampleAppState extends State<ExampleApp> {
final double containerHeight = 200.0;
bool _showProfile;
#override
void initState() {
_showProfile = false;
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
color: Colors.teal,
child: Stack(
children: <Widget>[
Container(
color: Colors.redAccent,
child: Center(
child: FlatButton(
child: Text("Animate"),
onPressed: () {
setState(() {
_showProfile = true;
});
},
),
),
),
AnimatedPositioned(
bottom: _showProfile ? 0 : -containerHeight,
right: 0,
left: 0,
duration: Duration(milliseconds: 300),
child: Container(
color: Colors.white,
height: containerHeight,
))
],
),
),
);
}
}
you can achieve the same with Bottomsheet too.
Check out
https://api.flutter.dev/flutter/material/BottomSheet-class.html
After days of search I'm getting help.
I work on a flutter application.
Context:
A grid view feeded with Json
-childs : GridTile with Flipcard in (https://pub.dev/packages/flip_card)
-On tap on GridTile there is a callback to get the selected Item and an animation because of the flipcard onTap
What I would:
When an item is aleready selected (flipcard flipped so we show the back of the card),
And I selected another item of the grid te(so flipcard of this itme also flipped)
I would like to flip back the old selected item Flipcard without rebuild the tree because I would lost the state of the new selected item.
I tried many thing. For example I tried to use GlobalKey on GridTiles to interract with after build but currentState is always null when I want to interact with.
I wonder what is the good practice in this case ?
I hope I was clear :) (I'm french)
Thank you the community!
.
Something to know...
It is possible to interract with the flipcard (child of gridtile) like this
(GlobalKey)
GlobalKey<FlipCardState> cardKey = GlobalKey<FlipCardState>();
#override
Widget build(BuildContext context) {
return FlipCard(
key: cardKey,
flipOnTouch: false,
front: Container(
child: RaisedButton(
onPressed: () => cardKey.currentState.toggleCard(),
child: Text('Toggle'),
),
),
back: Container(
child: Text('Back'),
),
);
}
I'm not sure if I understood your question, but here is an example of how you could use a GridView with FlipCards:
var cardKeys = Map<int, GlobalKey<FlipCardState>>();
GlobalKey<FlipCardState> lastFlipped;
Widget _buildFlipCard(String text, Color color, int index) {
return SizedBox(
height: 120.0,
child: Card(
color: color,
child: Center(
child:
Text(text, style: TextStyle(color: Colors.white, fontSize: 20.0)),
),
),
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("FlipCards")),
body: GridView.builder(
itemCount: 20,
itemBuilder: (context, index) {
cardKeys.putIfAbsent(index, () => GlobalKey<FlipCardState>());
GlobalKey<FlipCardState> thisCard = cardKeys[index];
return Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
FlipCardWithKeepAlive(
child: FlipCard(
flipOnTouch: false,
key: thisCard,
front: _buildFlipCard("$index", Colors.blue, index),
back: _buildFlipCard("$index", Colors.green, index),
onFlip: () {
if (lastFlipped != thisCard) {
lastFlipped?.currentState?.toggleCard();
lastFlipped = thisCard;
}
},
),
),
RaisedButton(
child: Text("Flip Card"),
onPressed: () => cardKeys[index].currentState.toggleCard(),
)
],
);
},
gridDelegate:
SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
),
);
}
class FlipCardWithKeepAlive extends StatefulWidget {
final FlipCard child;
FlipCardWithKeepAlive({Key key, this.child}) : super(key: key);
#override
State<StatefulWidget> createState() => FlipCardWithKeepAliveState();
}
class FlipCardWithKeepAliveState extends State<FlipCardWithKeepAlive>
with AutomaticKeepAliveClientMixin {
#override
Widget build(BuildContext context) {
super.build(context);
return widget.child;
}
#override
bool get wantKeepAlive => true;
}
You need to use a different key for each element of the list, I used a Map in this case.
I also wrapped the FlipCard with a custom FlipCardWithKeepAlive stateful widget that uses AutomaticKeepAliveClientMixin to keep alive the FlipCard while scrolling.
Edit: I updated the code so when you flip one card, the previous card flipped gets flipped back. Basically you need to save the last flipped card and when a new one is flipped, flip the last one and put the new one as last flipped.
The code will make both cards flip at the same time, if you want one card to wait the other use onFlipDone() instead of onFlip(), like this:
onFlipDone: (isFront) {
bool isFlipped = !isFront;
if (isFlipped && lastFlipped != thisCard) {
lastFlipped?.currentState?.toggleCard();
lastFlipped = thisCard;
}
}
Good Day,
I am making great progress on my first app using flutter, some differences for sure, but found great help here. I have successfully produced a dynamic listview from JSON api call, I am trying to take that and convert it to a 2 column potrait gridview and 3 landscape. I have looked through the flutter gallery demo and the docs and can not seem to get a handle on the flow.
Anyone have some other examples or guidance to accomplish.
What I currently have is a ListView.builder calling an itembuilder that returns widgets of a leading icon, text and trailing icon. I want to convert it using the ICON to be the grid of graphics with onTap to another page as the listview does.
Any help or guidance would be great, thought it should be a simple conversion, but it has not been so far. I will attach some of the code below.
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new RefreshIndicator(
child: new ListView.builder(
itemBuilder: _itemBuilder,
itemCount: listcount,
),
onRefresh: _onRefresh,
));
}
Widget _itemBuilder(BuildContext context, int index) {
Specialties spec = getSpec(index);
return new SpecialtyWidget(spec: spec,);
}
Specialties getSpec(int index) {
return new Specialties(
mylist[index]['id'], mylist[index]['name'], mylist[index]['details'],
new Photo(mylist[index]['image'], mylist[index]['name'],
mylist[index]['name']));
}
}
class SpecialtyWidget extends StatefulWidget {
SpecialtyWidget({Key key, this.spec}) : super(key: key);
final Specialties spec;
#override
_SpecialtyWidgetState createState() => new _SpecialtyWidgetState();
}
class _SpecialtyWidgetState extends State<SpecialtyWidget> {
#override
Widget build(BuildContext context) {
return new Container(
height: 64.0,
width: 128.0,
child: new ListTile(
trailing: new Icon(Icons.arrow_right, color: Colors.green, size: 50.0,),
leading: new Image.network('http://$baseurl:8080/getimage/'+widget.spec.pic.assetName, fit: BoxFit.cover,),
title: new Text(
widget.spec.name,
style: new TextStyle(fontSize: 15.0, fontWeight: FontWeight.bold),
),
onTap: _onTap,
),
);
Thanks
There's an example of GridView.count usage in the Flutter Gallery. You could use a LayoutBuilder or MediaQuery to determine whether the grid is portrait or landscape, and then choose a crossAxisCount count of 2 or 3 depending on what answer you get.