/// <summary>
/// Price collection event: When a period in the collection is changed
/// </summary>
/// <param name="collection">The period collection</param>
/// <param name="index">The index of element of the collection</param>
void IPeriodCollection_Updated(IPeriodCollection collection, int index)
{
IPeriod period = collection[index];
Console.WriteLine("Price updated: DateTime={0}, BidOpen={1}, BidHigh={2}, BidLow={3}, BidClose={4}, AskOpen={5}, AskHigh={6}, AskLow={7}, AskClose={8}, Volume={9}",
period.Time, period.Bid.Open, period.Bid.High, period.Bid.Low, period.Bid.Close,
period.Ask.Open, period.Ask.High, period.Ask.Low, period.Ask.Close, period.Volume);
}
/// <summary>
/// PriceHisitoryAPI controller event: A history is received from the server
/// </summary>
/// <param name="collection"></param>
private void PriceAPIController_CollectionLoaded(IPeriodCollection collection)
{
// The event will be sent from another thread
if (this.InvokeRequired)
{
this.BeginInvoke(new PriceAPIController_CollectionLoaded(PriceAPIController_CollectionLoaded), collection);
}
else
{
// Create a from which displays the collection
PriceHistoryForm form = new PriceHistoryForm(collection, mController);
form.MdiParent = this;
form.Show();
}
}
/// <summary>
/// Price collection event: When a period in the collection is changed
/// </summary>
/// <param name="collection"></param>
/// <param name="index"></param>
void IPeriodCollection_Updated(IPeriodCollection collection, int index)
{
// The event may be sent asynchronously
if (this.InvokeRequired)
{
this.Invoke(new IPeriodCollection_Updated(IPeriodCollection_Updated), null, index);
}
else
{
// update corrsponding list view item
while (listViewHistory.Items.Count < mCollection.Count)
{
AddItem(listViewHistory.Items.Count);
}
fillItem(index, listViewHistory.Items[index]);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="collection">The collection of the prices to be displayed</param>
/// <param name="controller">The Price API controller</param>
internal PriceHistoryForm(IPeriodCollection collection, PriceAPIController controller)
{
InitializeComponent();
mCollection = collection;
// find the offer for the collection instrument and
// make the proper numeric format to display the prices
// of the collection.
foreach (IOffer offer in controller.Offers)
{
if (offer.Instrument == collection.Instrument)
{
mNumberFormat = "0." + new string('0', offer.Digits);
}
}
if (mNumberFormat == null)
{
mNumberFormat = "0.00";
}
// add items to the list view (for the real application virtual list view
// will be more effective solution)
for (int i = 0; i < collection.Count; i++)
{
AddItem(i);
}
// set the window title to the collection parameters
this.Text = string.Format("History:{0}[{1}]{2}", collection.Instrument, collection.Timeframe, collection.IsAlive ? " (live)" : "");
// and subscribe for the collection update event if the collection is subscribed
// for the price updates, so it will be changed every time when a new tick is received
if (collection.IsAlive)
{
mCollection.OnCollectionUpdate += this.IPeriodCollection_Updated;
}
}
