//instantiates a new OrderPageInventory form
private void newInv()
{
OrderPageInventory inv = new OrderPageInventory();
inv.MdiParent = this;
inv.Show();
this.LayoutMdi(MdiLayout.Cascade);
}
private void nextToolStripMenuItem_Click(object sender, EventArgs e)
{
switch (step)
{
case 1: //next has been clicked from OrderPageBMC
OrderPageBMC bmc = (OrderPageBMC)ActiveMdiChild;
if (bmc.allSelected()) //save selection values, open next window, close bmc
{
//retrieve and store the users selections from the form
saveSelections(bmc.selections());
bmc.Close(); //close the current child window
newVS(); //create and show new OrderPageVS child
step = 2; //iteratestep counter to VS window
}
else //create message window informing user to select one of each
{
MessageBox.Show("You must select at least one option from each group",
"Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
break;
case 2: //next has been clicked from OrderPageVS
//retrieve and store users selections from the form
OrderPageVS vs = (OrderPageVS)ActiveMdiChild;
saveSelections(vs.selections());
vs.Close();
newPay(); //create and show new OrderPagePay child
step = 3; //iterate step counter to Pay window
break;
case 3: //next clicked from OrderPagePay
//retrieve the form
OrderPagePay pay = (OrderPagePay)ActiveMdiChild;
//validate the pay info, if the allowed attempts is exceeded cancel the order
if (!pay.validatePayment()) //if the payment was invalid
{
//validatePayment does all the heavy lifting except for cancelling the order
//which we have to do here, so if the allowed attempts have been exceeded
//we cal the function to cancel the order.
if (pay.Attempts == 0) //if there are no attempts left
{
cancelOrder();
}
}
else //thank customer for order and close window, update inventory and display
{
MessageBox.Show("Thank you for your order",
"Thank your", MessageBoxButtons.OK, MessageBoxIcon.None);
pay.Close();
updateInventory(); //remove sandwichSelections from inventory and clear list
//display the updated inventory screen
newInv();
//Disable the cancel button since it no longer applies
cancelToolStripMenuItem.Enabled = false;
step = 4;
}
break;
case 4: //next is pressed from OrderPageInventory
OrderPageInventory inv = (OrderPageInventory)ActiveMdiChild;
inv.Close();
//enable/disable controls and reset step counter
nextToolStripMenuItem.Enabled = false;
newSandwichToolStripMenuItem.Enabled = true;
step = 0;
//program is now ready to accept a new sandwich order
break;
} //end switch
}