private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
// Changing the tab (table) essentially assigns the selectedTable variable
// trap door the event if we are midway through an order or if the table
// has already ordered
if (newOrder != null)
return;
selectedSeat = null;
TabControl selectedTab = (TabControl)sender;
selectedTable = tables[selectedTab.SelectedIndex];
// trapdoor the event if the table has already ordered
// this has to be done after the selectedTable var is
// updated or a subtle bug is introduced
if (selectedTable.OrderPlaced == true)
return;
// The selected table has its seats added to the 'seated' arraylist
// for the table object. The seats are disabled in preparation
// for when the start new order button is hit
foreach (Control ctrl in tabControl1.SelectedTab.Controls)
{
if (ctrl is Seat)
{
if (selectedTable.seated.Count < 4)
{
selectedTable.seated.Add((Seat)ctrl);
ctrl.Enabled = false;
}
}
}
selectedTable.Waiter = labelWaiter.Text;
// a new order may now be raised
buttonStartOrder.Enabled = true;
}
private void initObjects()
{
// We create an object to manage all the local database interactions
ldp = new LocalDataProcessor();
wsp = new WebServiceProcessor();
// Create 10 tables
for (int i = 0; i < 10; i++)
{
tables[i] = new Table(i);
}
selectedTable = tables[0];
// to handle seat color changes the table class has a
// an arraylist called 'seated' full of seat objects
// they are added here
foreach (Control ctrl in tabControl1.TabPages[0].Controls)
{
if (ctrl is Seat)
{
if (selectedTable.seated.Count <= 4)
selectedTable.seated.Add((Seat)ctrl);
}
}
// What meal is unavailable today? We read in the first
// entry from a flat 'UnavailableMeals.txt' file here
string getLocation = Directory.GetCurrentDirectory();
FileStream fs =
new FileStream(getLocation + "\\UnavailableMeals.txt", FileMode.OpenOrCreate, FileAccess.Read);
StreamReader sr = new StreamReader(fs);
string offMeals = sr.ReadLine();
int offMealNo = int.Parse(offMeals.Substring(0,1));
sr.Close();
// write out the stream without the off meal
fs = new FileStream(getLocation + "\\UnavailableMeals.txt", FileMode.Create, FileAccess.Write);
StreamWriter sw = new StreamWriter(fs);
sw.Write(offMeals.Substring(1));
sw.Close();
fs.Close();
// and notify the user
listBoxSummary.Items.Add(listBoxMeals.Items[offMealNo] + " is unavailable");
// The meal must now be taken off the menu
listBoxMeals.Items.RemoveAt(offMealNo);
}