public override Widget build(BuildContext context) =>
new Scaffold(
body: new PageView(
controller: _pageController,
onPageChanged: id => setState(() => _currentIndex = id),
children: _pages
.Select(b => b(context))
.ToList()
),
bottomNavigationBar: new Theme(
data: Theme.of(context),
child: new BottomNavigationBar(
items: new List <BottomNavigationBarItem> {
new BottomNavigationBarItem(
icon: new Icon(Icons.home),
title: new Text("Home")
),
new BottomNavigationBarItem(
icon: new Icon(Icons.settings),
title: new Text("Settings")
),
},
showUnselectedLabels: true,
currentIndex: _currentIndex,
onTap: id => _pageController.animateToPage(
id,
duration: System.TimeSpan.FromMilliseconds(300),
curve: Curves.ease
),
type: BottomNavigationBarType.fix
)
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
floatingActionButton: new FloatingActionButton(
child: new Icon(Icons.camera_alt),
onPressed: () => Navigator
.of(context)
.push(
new PageRouteBuilder(
pageBuilder: (cont, _, __) => _camera(cont),
transitionsBuilder: (_, animation, __, child) => {
var begin = new Offset(0f, 1f);
var end = Offset.zero;
var curve = Curves.ease;
var tween = new OffsetTween(begin: begin, end: end)
.chain(new CurveTween(curve));
return(new SlideTransition(
position: animation.drive(tween),
child: child));
}
)
)
)
);
public override Widget buildActions(BuildContext context, CustomDismissibleDelegateContext ctx)
{
var animation = new OffsetTween(
Offset.zero,
ctx.createOffset(ctx.state.totalActionsExtent * ctx.state.dragSign)
).animate(ctx.state.actionsMoveAnimation);
if (ctx.state.actionsMoveAnimation.value != 0.0f)
{
return(new Container(
child: new Stack(
children: new List <Widget> {
this.buildStackActions(context, ctx),
new SlideTransition(
position: animation,
child: ctx.state.widget.child
)
}
)
));
}
return(ctx.state.widget.child);
}
protected override Widget buildActionsWhileDismissing(BuildContext context,
CustomDismissibleDelegateContext ctx)
{
var animation = new OffsetTween(
Offset.zero,
ctx.createOffset(ctx.state.dragSign)
).animate(ctx.state.overallMoveAnimation);
return(new Container(
child: new Stack(
children: new List <Widget> {
Positioned.fill(
new LayoutBuilder(builder: (_context, constraints) => {
var count = ctx.state.actionCount;
var actionExtent =
ctx.getMaxExtent(constraints) * ctx.state.widget.actionExtentRatio;
var totalExtent = ctx.getMaxExtent(constraints);
var extentAnimations = new List <Animation <float> >();
for (var index = 0; index < count; index++)
{
var extentAnimation = new FloatTween(
(float)actionExtent,
totalExtent - (float)actionExtent * (ctx.state.actionCount - index - 1)
).animate(
new CurvedAnimation(
ctx.state.overallMoveAnimation,
new Interval(ctx.state.totalActionsExtent, 1)
)
);
extentAnimations.Add(extentAnimation);
}
return new AnimatedBuilder(
animation: ctx.state.overallMoveAnimation,
builder: (cxt, child) => {
var widgets = new List <Widget>();
for (var index = 0; index < ctx.state.actionCount; index++)
{
var displayIndex = ctx.showActions
? ctx.state.actionCount - index - 1
: index;
var widget = ctx.createPositioned(
position: (float)actionExtent *
(ctx.state.actionCount - index - 1),
extent: extentAnimations[index].value,
child: ctx.state.actionDelegate.build(
context,
displayIndex,
ctx.state.overallMoveAnimation,
ctx.state.renderingMode
)
);
widgets.Add(widget);
}
return new Stack(
children: widgets
);
}
);
}
)
),
new SlideTransition(
position: animation,
child: ctx.state.widget.child
)
}
)));
}
