/// <summary>
/// dispatcher timer to update prices for each ticker, uses fast tick rate to animate price changes
/// </summary>
private void StartPriceUpdatingDispatcherTimer()
{
_updateTimer = new DispatcherTimer();
_updateTimer.Interval = TimeSpan.FromMilliseconds(_animateIntervalMillis);
_updateTimer.Tick += (sender, e) => {
//larger interval - check API for new prices
if (_currentIntervalCount == _updateInterval)
{
_currentIntervalCount = 0;
//choose random batch of tickers to update
_currentTickerBatchIndices = new int[_tickerBatchCount];
for (int i = 0; i < _tickerBatchCount; i++)
{
//if queue is empty, ticker update cycle has completed,
//so first remove any unwanted tickers and update portions
//then create new random ticker order
//***NOTE*** this can create redundant coins in a ticker batch due to wrap-around
if (_randomIndexQueue.Count == 0)
{
for (int tickerIndex = 0; tickerIndex < Tickers.Count; tickerIndex++)
{
if (Tickers[tickerIndex].RemoveRequested == true)
{
Tickers.RemoveAt(tickerIndex);
tickerIndex--;
}
else
{
UpdatePortion(Tickers[tickerIndex]);
}
}
CreateRandomTickerUpdateOrder();
}
_currentTickerBatchIndices[i] = _randomIndexQueue.Dequeue();
}
//update the current batch of tickers
UpdateTickers(_currentTickerBatchIndices);
//update the USD total
UpdateTotal();
if (NewCoinBackgroundColor != "#CCC")
{
NewCoinBackgroundColor = "#CCC";
}
}
//smaller interval - otherwise check if any prices need to be animated
else
{
_currentIntervalCount++;
foreach (int tickerIndex in _currentTickerBatchIndices)
{
if (Tickers[tickerIndex].IsAnimating)
{
Tickers[tickerIndex].AnimateMoveTowardNewPrice();
}
}
}
};
_updateTimer.IsEnabled = true;
}