private void OnZOrderChanged(object sender, ZOrderChangedEventArgs e)
{
//ZOrderChanged?.Invoke(sender, e);
if (ZOrderChanged != null)
{
ZOrderChanged(sender, e);
}
}
private void Field_ZOrderChanged(object sender, ZOrderChangedEventArgs e)
{
// field.Zorder == e.newValue
var field = sender as IField;
if (field == null || e.PreviousValue == e.NewValue)
{
return;
}
// zorder should be THE key.
fields.Remove(e.PreviousValue);
var toBePosition = fields.Keys.IndexOf(e.NewValue);
if (toBePosition == -1)
{
fields.Add(field.ZOrder, field);
return;
}
//
IField replacedItem = null;
IField replacingItem = field;
field.ZOrderChanged -= this.Field_ZOrderChanged;
Func <int, int> opp;
// now i have to move previous item on a position
if (e.NewValue < e.PreviousValue)
{
opp = (i) => i + 1;
}
else
{
opp = (i) => i - 1;
}
var prevPos = field.ZOrder;
var pos = toBePosition;
while (pos != -1)
{
replacedItem = fields.Values[pos];
replacedItem.ZOrderChanged -= this.Field_ZOrderChanged;
//cleaning new space
fields.Remove(replacingItem.ZOrder);
// inserting on a new place
replacingItem.ZOrderChanged += this.Field_ZOrderChanged;
fields.Add(replacingItem.ZOrder, replacingItem);
// setting new id that tepends on a direction.
replacedItem.ZOrder = opp(replacedItem.ZOrder);//Everything should be handled recursively.
pos = fields.Keys.IndexOf(replacedItem.ZOrder);
replacingItem = replacedItem;
}
replacingItem.ZOrderChanged += this.Field_ZOrderChanged;
fields.Add(replacingItem.ZOrder, replacingItem);
}
