protected override Widget buildStackActions(BuildContext context, CustomDismissibleDelegateContext ctx)
{
return(Positioned.fill(
new LayoutBuilder(builder: (_context, constraints) => {
var totalExtent =
ctx.getMaxExtent(constraints) * ctx.state.totalActionsExtent;
var animation = new FloatTween(-totalExtent, 0).animate(ctx.state.actionsMoveAnimation);
return new AnimatedBuilder(
animation: ctx.state.actionsMoveAnimation,
builder: (cxt, child) => {
var widgets = new List <Widget>();
ctx.buildActions(cxt).ForEach(item => {
var widget = new Expanded(child: item);
widgets.Add(widget);
});
return new Stack(
children: new List <Widget> {
ctx.createPositioned(
position: animation.value,
extent: totalExtent,
child: new Flex(
ctx.state.widget.direction,
children: widgets
)
)
}
);
}
);
})
));
}
protected override Widget buildStackActions(BuildContext context, CustomDismissibleDelegateContext ctx)
{
return(Positioned.fill(
new LayoutBuilder(builder: (_context, constraints) => {
var widgets = new List <Widget>();
ctx.buildActions(_context).ForEach(item => {
var widget = new Expanded(child: item);
widgets.Add(widget);
});
return new Stack(
children: new List <Widget> {
ctx.createPositioned(
position: 0,
extent:
ctx.getMaxExtent(constraints) * ctx.state.totalActionsExtent,
child: new Flex(
ctx.state.widget.direction,
children: widgets
)
)
}
);
})
));
}
public Widget buildActions(BuildContext context, CustomDismissibleDelegateContext ctx,
CustomDismissibleDelegate dismissibleDelegate)
{
if (ctx.state.overallMoveAnimation.value > ctx.state.totalActionsExtent)
{
return(this.buildActionsWhileDismissing(context, ctx));
}
return(dismissibleDelegate.buildActions(context, ctx));
}
protected override Widget buildStackActions(BuildContext context, CustomDismissibleDelegateContext ctx)
{
return(Positioned.fill(
new LayoutBuilder(builder: (_context, constraints) => {
var state = ctx.state;
var count = state.actionCount;
var showActions = ctx.showActions;
var actionsMoveAnimation = state.actionsMoveAnimation;
var actionExtent = ctx.getMaxExtent(constraints) * state.widget.actionExtentRatio;
var actionDelegate = state.actionDelegate;
var animations = new List <Animation <float> >();
for (var index = 0; index < count; index++)
{
var animation = new FloatTween(
-(float)actionExtent,
(count - index - 1) * (float)actionExtent
).animate(actionsMoveAnimation);
animations.Add(animation);
}
return new AnimatedBuilder(
animation: actionsMoveAnimation,
builder: (cxt, child) => {
var widgets = new List <Widget>();
for (var index = 0; index < count; index++)
{
var displayIndex = showActions ? count - index - 1 : index;
var widget = ctx.createPositioned(
position: animations[index].value,
extent: (float)actionExtent,
child: actionDelegate.build(
context,
displayIndex,
actionsMoveAnimation,
CustomDismissibleMode.slide
)
);
widgets.Add(widget);
}
return new Stack(
children: widgets
);
}
);
})
));
}
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
)
}
)));
}
protected abstract Widget buildActionsWhileDismissing(BuildContext context,
CustomDismissibleDelegateContext ctx);
protected abstract Widget buildStackActions(BuildContext context, CustomDismissibleDelegateContext ctx);
public abstract Widget buildActions(BuildContext context, CustomDismissibleDelegateContext ctx);
