public _ActiveItem(
AnimationController controller,
int itemIndex,
AnimatedListRemovedItemBuilder removedItemBuilder
)
{
this.controller = controller;
this.itemIndex = itemIndex;
this.removedItemBuilder = removedItemBuilder;
}
public void removeItem(int index, AnimatedListRemovedItemBuilder builder, TimeSpan?duration = null)
{
duration = duration ?? _kDuration;
D.assert(index >= 0);
D.assert(builder != null);
D.assert(duration != null);
int itemIndex = _indexToItemIndex(index);
D.assert(itemIndex >= 0 && itemIndex < _itemsCount);
D.assert(_activeItemAt(_outgoingItems, itemIndex) == null);
_ActiveItem incomingItem = _removeActiveItemAt(_incomingItems, itemIndex);
AnimationController controller = incomingItem?.controller
?? new AnimationController(duration: duration, value: 1.0f, vsync: this);
_ActiveItem outgoingItem = new _ActiveItem(controller, itemIndex, builder);
setState(() => {
_outgoingItems.Add(outgoingItem);
_outgoingItems.Sort();
});
controller.reverse().then((_) => {
_removeActiveItemAt(_outgoingItems, outgoingItem.itemIndex).controller.dispose();
foreach (_ActiveItem item in _incomingItems)
{
if (item.itemIndex > outgoingItem.itemIndex)
{
item.itemIndex -= 1;
}
}
foreach (_ActiveItem item in _outgoingItems)
{
if (item.itemIndex > outgoingItem.itemIndex)
{
item.itemIndex -= 1;
}
}
setState(() => _itemsCount -= 1);
});
}
public void removeItem(int index, AnimatedListRemovedItemBuilder builder, TimeSpan?duration = null)
{
duration = duration ?? _kDuration;
_sliverAnimatedListKey.currentState.removeItem(index, builder, duration: duration);
}
