void AssertIsValid()
{
if (!pad.sorting && !currentIter.Equals(Gtk.TreeIter.Zero) && !store.IterIsValid(currentIter))
{
if (dataItem == null || !MoveToObject(dataItem))
{
throw new InvalidOperationException("Tree iterator has been invalidated.");
}
}
}
void StartAnimation()
{
if (Animation == null)
{
Animation = AnimatedIcon.StartAnimation(delegate(Xwt.Drawing.Image pix) {
if (TreeStore.IterIsValid(Iter))
{
TreeStore.SetValue(Iter, Column, pix);
}
else
{
UnregisterTreeAnimation(this);
}
});
}
}