void _startResizeAnimation()
{
D.assert(this._overallMoveController != null);
D.assert(this._overallMoveController.isCompleted);
D.assert(this._resizeController == null);
D.assert(this._sizePriorToCollapse == null);
var slideToDismissDelegate = this.widget.slideToDismissDelegate;
if (slideToDismissDelegate.resizeDuration == null)
{
this._handleDismiss();
}
else
{
this._resizeController =
new AnimationController(duration: slideToDismissDelegate.resizeDuration, vsync: this);
this._resizeController.addListener(this._handleResizeProgressChanged);
this._resizeController.addStatusListener(status => this.updateKeepAlive());
this._resizeController.forward();
this.setState(() => {
this._renderingMode = CustomDismissibleMode.resize;
this._sizePriorToCollapse = this.context.size;
this._resizeAnimation = new FloatTween(1, 0).animate(
new CurvedAnimation(this._resizeController, CustomDismissibleUtil.ResizeTimeCurve));
});
}
}
void _handleDragUpdate(DragUpdateDetails details)
{
if (this.widget.controller != null && this.widget.controller.activeState != this)
{
return;
}
var delta = details.primaryDelta;
if (delta != null)
{
this._dragExtent += (float)delta;
}
this.setState(() => {
this._overallMoveController.setValue(this._dragExtent.abs() / this._overallDragAxisExtent);
this._actionsMoveController.setValue(this._dragExtent.abs() / this._actionsDragAxisExtent);
this._renderingMode = this._overallMoveController.value > this.totalActionsExtent
? CustomDismissibleMode.dismiss
: CustomDismissibleMode.slide;
});
}
public override Widget build(BuildContext context, int index, Animation <float> animation,
CustomDismissibleMode mode)
{
return(this.actions[index]);
}
public abstract Widget build(BuildContext context, int index, Animation <float> animation,
CustomDismissibleMode mode);
