//update method from the observer, to update datagrid with realtimedata
public void Update(Class_RealTimeData subject)
{
dataGridView1.Rows.Clear();
//workout max possible length using buyordersize and sellordersize
int size;
if (currCompany.getSellOrderSize() > currCompany.getBuyOrderSize())
{
size = currCompany.getSellOrderSize();
}
else
{
size = currCompany.getBuyOrderSize();
}
//for loop to add data to each row of the datagrid
for (int i = 0; i < size; i++)
{
//if a row contains seller order only ie: more sellers than buyers so first 2 rows are blank at some point
if (i >= currCompany.getBuyOrderSize())
{
dataGridView1.Rows.Add("", "", currCompany.getSellOrder(i).getPrice(), currCompany.getSellOrder(i).getOrderSize());
}
//if a row contains buyer order only ie: more buyers than selles so first 2 rows are blank at some point
else if (i >= currCompany.getSellOrderSize())
{
dataGridView1.Rows.Add(currCompany.getBuyOrder(i).getOrderSize(), currCompany.getBuyOrder(i).getPrice());
}
//else called on rows that contain both buyers and sellers
else
{
dataGridView1.Rows.Add(currCompany.getBuyOrder(i).getOrderSize(), currCompany.getBuyOrder(i).getPrice(), currCompany.getSellOrder(i).getPrice(), currCompany.getSellOrder(i).getOrderSize());
}
//limit of the top 10 so break out of the for loop
if (i == 9)
{
break;
}
}
}
//update method from the observer, to update datagrid with realtimedata
public void Update(Class_RealTimeData subject)
{
dataGridView1.Rows.Clear();
//create a temporary set of buy and sell orders
//group each by price, to join orders with the same price
List <Class_BuyOrder> tmp = company.getBuyOrders();
var grpBuyOrders = tmp.GroupBy(x => x.getPrice());
List <Class_SellOrder> tmp2 = company.getSellOrders();
var grpSellOrders = tmp2.GroupBy(x => x.getPrice());
//workout max possible length using buyordersize and sellordersize
int size = 0;
if (company.getBuyOrderSize() > company.getSellOrderSize())
{
size = company.getBuyOrderSize();
}
else
{
size = company.getSellOrderSize();
}
//for loop to add data to each row of the datagrid
for (int i = 0; i < size; i++)
{
double buyVolume = 0;
int buyCounter = 0;
double buyPrice = 0;
//workout out the volume, price and size of each order buy group
if (i < grpBuyOrders.Count())
{
buyPrice = grpBuyOrders.ElementAt(i).Key;
foreach (var value in grpBuyOrders.ElementAt(i))
{
buyVolume += value.getOrderSize();
buyCounter++;
}
}
double sellVolume = 0;
int sellCounter = 0;
double sellPrice = 0;
//workout out the volume, price and size of each order sell group
if (i < grpSellOrders.Count())
{
sellPrice = grpSellOrders.ElementAt(i).Key;
foreach (var value in grpSellOrders.ElementAt(i))
{
sellVolume += value.getOrderSize();
sellCounter++;
}
}
//if a row contains seller order only ie: more sellers than buyers so first 3 rows are blank at some point
if (i >= grpBuyOrders.Count())
{
if (sellCounter > 0)
{
dataGridView1.Rows.Add("", "", "", sellPrice, sellVolume, sellCounter);
}
}
//if a row contains buyer order only ie: more buyers than selles so first 2 rows are blank at some point
else if (i >= grpSellOrders.Count())
{
if (buyCounter > 0)
{
dataGridView1.Rows.Add(buyCounter, buyVolume, buyPrice);
}
}
//if both buy and sell orders in row
else
{
if (buyCounter > 0 && sellCounter > 0)
{
dataGridView1.Rows.Add(buyCounter, buyVolume, buyPrice, sellPrice, sellVolume, sellCounter);
}
}
//limit of the top 10 so break out of the for loop
if (i == 9)
{
break;
}
}
}