I have a pane app with Drawer, which I show in a pane layout when the phone is in landscape mode:
To not animate the drawer between pages, I have put it into a Hero.
class SomePage extends Stateless Widget {
Widget build(BuildContext context) {
return Row(
children: <Widget>[
Hero(
child: Material(
elevation: 4.0,
child: MyDrawer(),
tag: "drawer",
),
Expanded(
child: Scaffold(
appBar: ...,
body: ...
)
),
],
);
}
}
The drawer contains a CustomScrollView.
When the user changes pages using Navigator.pushNamed (I am using MaterialApp with onGenerateRoute), the scroll position of the CustomScrollView is reset.
How can I keep the scroll position between page changes (or how can I synchronize the scroll position of the drawer on different pages)?
Related
I am trying to align a button at bottom of a scrollable screen. For scrolling I used SingleChildScrollView and inside which I added all the widgets. Now the only issue I face is the button is not sticking at the bottom on scroll. Help would be appreciated.
As you can see in the image, the buy now button and add to cart button aligned at bottom. If we scroll the entire page, the button will not be scrollable, instead it will be sticking at bottom. I want to implement in this way.
You can use an stack and put All the widgets except button as its First child and then the button as another child of stack. Below it the example code -
class MyNewApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
alignment: Alignment.center,
children:[
Container(
height:MediaQuery.of(context).size.height,
width:MediaQuery.of(context).size.width,
child:SingleChildScrollView(
child: Column(
// Provide Your Widget here
),
),
),
Positioned(
bottom:0,
child:Align(
alignment:Alignment.center,
child: RaisedButton(
child:Text("Button"),
onPressed:(){},
),
),
),
],
),
);
}
}
I was trying to build to build slack mobile app like side nav where we can swipe right to reveal the drawer and also the main body moves right as drawer opens.
Layout:
Stack
-Drawer()
-Homepage()
On the hamburger icon click, I am using animated position to shift the HomePage() and reveal the drawer.
But how can I implement something like the pageview thing, where first child would be Drawer and second child would be Homepage and I can right to reveal the drawer, but the drawer's width will be only 0.5* viewportfraction so the homepage is also revealed and dimmed.
i faced the same problem and i used Stack to solve it, look at
the example:
Stack(
children: <Widget>[
buildPartnerList(context),
FilterDrawer(),
],
),
in the FilterDrawer i returned one animationBuilder
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: _animationController,
builder: (context, widget) => buildFilterDrawer(context, widget),
);
}
the buildFilterDrawer its something like this
Container(
color: Theme.of(context).accentColor,
width: widthAnimation.value,
child: Stack(
children: <Widget>[
...
and to make the animation, i have one GestureDetector, when clicked animate my side Bar
_moveFliterDrawerAnimation() {
setState(() {
_isExpanded
? _animationController.reverse()
: _animationController.forward();
_isExpanded = !_isExpanded;
});
}
I want to do a screen where there is a scrollable widget and a non-scrollable widget where the non-scrollable will be on top of the scrollable widget in dart flutter.
I have tried something this: pseudo-code:
Stacked(
children: <Widget>[
SingleChildScrollView(
child: // scrollable widget
),
Align(
alignment: Alignment.bottomCenter,
child: // non-scrollable widget eg container
),
]
)
But the scrollable widget is not scrolling. No error with this implementation but scrolling not working
The problem here is that the non scrollable widget is on top of the scrollable one and tends to block all the touch event to the bottom widget (the scrollable one.)
you have several ways to fix this, the first one is to wrap your non scrollable widget inside an IgnorePointer
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Stack(children: [
ListView.builder(itemBuilder: (context, index) {
return Text("item ${index + 1}");
}),
IgnorePointer(
child: Align(
alignment: Alignment.bottomCenter,
child: Container(color: Colors.red.withAlpha(50))),
),
]));
}
but this will prevent any input on the overlapping widget
If you want to achieve the same, but being able to interact with the overlapping widget, you may want to change the IgnorePointer with a GestureDetector, and play with the behaviors https://api.flutter.dev/flutter/widgets/GestureDetector/GestureDetector.html
In my log in screen attached below, I want the view to stay fixed even when I open the keyboard.
If you see the screenshot of how my screen currently behaves, you can notice that it gets scrolled up(pay attention to the Logo TextField) when the keyboard is opened.
I am currently using SingleChildScrollView to avoid overflow, but even if i do not use a SingleChildScrollView, the screen still repositions after opening the keyboard, only this time, with a pixel overflow.
class LoginScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Center(
child: SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
children: <Widget>[
_logo(),
LoginForm(),
],
),
),
);
}
}
How can I keep the original positioning of the screen(as shown in the screenshot on the left) even when the keyboard is opened?
Edit: Already tried resizeToAvoidBottomInset, it still scrolls.
In your Scaffold, try putting resizeToAvoidBottomInset property to "false".
You can wrap your content in a Scaffold then set the property resizeToAvoidBottomInset to false so it will not resize your content when the device's Keyboard is shown. I've updated your code so you can use it.
class LoginScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: false,
body: Center(
child: SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
children: <Widget>[
_logo(),
LoginForm(),
],
),
),
)
);
}
}
I have used SilverAppBar but don't know how to add a drawer to it. I just want an app bar with a drawer that hides on scrolling
Note that the Scaffold takes care of all of the major behavior associated with Material design.
If you add the drawer field to your Scaffold, it will automatically add a hamburger menu icon to the left hand side of your SilverAppBar in flutter.
Code:
#override
Widget build(BuildContext context) {
return Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
title: Text('Drawer - Sliver AppBar'),
)],
),
drawer: Drawer(
child: Column(
children: <Widget>[
DrawerHeader(
child: Text(' I am Drawer'),
curve: SawTooth(12),
),
],
),
),
);
}