protected override void RemoveItem(int index)
{
var item = this[index];
base.RemoveItem(index);
item.UpdateOrderChanged -= OnComponentLoopPropChanged;
item.DrawOrderChanged -= OnComponentLoopPropChanged;
NoireUtilities.RaiseEvent(ComponentRemoved, this, new GameComponentCollectionEventArgs(item));
}
protected override void InsertItem(int index, GameComponent item)
{
// 处理 UpdateOrder 和 DrawOrder 冲突
if (Count > 0)
{
var updateLarger = from t in this
where t.UpdateOrder >= index
orderby t.UpdateOrder ascending
select t;
var drawLarger = from t in this
where t.DrawOrder >= index
orderby t.DrawOrder ascending
select t;
int counter;
var value = 0;
var toAdd = 0;
if (updateLarger.Any())
{
counter = 0;
foreach (var component in updateLarger)
{
if (counter == 0)
{
value = component.UpdateOrder;
toAdd = value > index ? 0 : 1;
}
component.UpdateOrder += value - index + toAdd;
++counter;
}
}
if (drawLarger.Any())
{
counter = 0;
foreach (var component in drawLarger)
{
if (counter == 0)
{
value = component.DrawOrder;
toAdd = value > index ? 0 : 1;
}
component.DrawOrder += value - index + toAdd;
++counter;
}
}
}
base.InsertItem(index, item);
item.UpdateOrderChanged += OnComponentLoopPropChanged;
item.DrawOrderChanged += OnComponentLoopPropChanged;
item.DrawOrder = index;
item.UpdateOrder = index;
NoireUtilities.RaiseEvent(ComponentAdded, this, new GameComponentCollectionEventArgs(item));
}
private void OnComponentLoopPropChanged(object sender, EventArgs e)
{
NoireUtilities.RaiseEvent(ComponentLoopPropChanged, sender, e);
}