// Drawing is triggered here on a timer rather than in
// CalcBar() because the bid and ask can change without CalcBar()
// being called.
protected override void OnRecalcLastBarAfterEvent()
{
if (Bars.DOM.Connected)
{
var _changed = false;
// confusing logic; necessary because Bids/Asks will be null
// on the first pass through.
DOMPrice _old_ask = new DOMPrice(double.NaN, double.NaN);
DOMPrice _old_bid = new DOMPrice(double.NaN, double.NaN);
double _old_last = double.NaN;
lock (this){
if (null == Asks)
{
_changed = true;
}
else
{
_old_ask = Asks[0];
_old_bid = Bids[0];
_old_last = LastPrice;
}
Asks = Bars.DOM.Ask;
Bids = Bars.DOM.Bid;
LastPrice = Bars.Close[0];
_changed = _changed || !((_old_ask == Asks[0]) &&
(_old_bid == Bids[0]) &&
(_old_last == LastPrice));
}
_changed = _changed || !(LastPrice == Bars.Close[0]);
if (_changed)
{
ChartCustomDraw.ReDraw();
}
ExecControl.RecalcLastBarAfter(TimeSpan.FromSeconds(UpdateSpeedSecs));
}
}
internal void SetDOM(DOMPrice ask, DOMPrice bid)
{
__cAsk = ask;
__cBid = bid;
}
private static bool equal(DOMPrice _1, DOMPrice _2)
{
return(_1.Size == _2.Size && _1.Price == _2.Price);
}
