}//end ValidateValues
//--------------------------------------------------------------
// Calls the Currency_Exchange class to convert the value
// according to the currency provided
//
// Precondition: inputValue - double retrieved from the amount
// entered by the user
//
// Postcondition: returns a double from the final conversion
// to the output currency using the Currency_Exchange class
//--------------------------------------------------------------
public double Convert(double inputValue)
{
int inputCurrency, outputCurrency;
//get inputed currencies
inputCurrency = cboCurrency1.SelectedIndex;
outputCurrency = cboCurrency2.SelectedIndex;
//If the first currency is AUD, proceed to final conversion
if (cboCurrency1.SelectedItem.ToString() != "Australia (AUD)")
{
//Convert inputValue from value in input currency to value in AUD currency
double tempValue = Currency_Exchange.ToAUD(inputCurrency, inputValue);
//If the final currency is to be AUD, return the tempValue
if (cboCurrency2.SelectedItem.ToString() != "Australia (AUD)")
{
//Convert tempValue from value in AUD currency to value in output currency
return(Currency_Exchange.FromAUD(outputCurrency, tempValue));
}
else
{
//return AUD value
return(tempValue);
}
}
else
{
//Convert inputValue from value in AUD to value in output currency
return(Currency_Exchange.FromAUD(outputCurrency, inputValue));
}
}//end Convert
}//end OutputConversion
//--------------------------------------------------------------
// Changes the form elements according to the given stage of the
// user input
//
// Precondition: stage - integer identifiying the particular
// stage of the input
//
// Postcondition: n/a
//--------------------------------------------------------------
public void InputStates(int stage)
{
switch (stage)
{
//Following cboCurrency1 select
case 1:
cboCurrency1.Enabled = false;
cboCurrency2.Enabled = true;
break;
//Following cboCurrency2 select
case 2:
//disable current input
cboCurrency2.Enabled = false;
//get currency code based on first selection and output to label
lblCurrencyCode1.Text = Currency_Exchange.GetCurrencyCode(cboCurrency1.SelectedIndex);
lblCurrencyCode1.Visible = true;
//enable next input
txtInput.Enabled = true;
//disabled convert button (if enabled)
btnConvert.Enabled = false;
break;
//Following txtInput edit (with value entered)
case 3:
//enable convert button
btnConvert.Enabled = true;
break;
//Final Form State (following conversion)
case 4:
//get currency code based on second selection and output to label
lblCurrencyCode2.Text = Currency_Exchange.GetCurrencyCode(cboCurrency2.SelectedIndex);
lblCurrencyCode2.Visible = true;
//disable current inputs
txtInput.Enabled = false;
btnConvert.Enabled = false;
//enable next input
grpPromptRepeat.Visible = true;
break;
//Reset/Default Form State
default:
//enable first input
cboCurrency1.Enabled = true;
//clear textboxes
txtInput.Clear();
txtOutput.Clear();
//disable other inputs
btnConvert.Enabled = false;
cboCurrency2.Enabled = false;
txtInput.Enabled = false;
txtOutput.Enabled = false;
//hide currency codes
lblCurrencyCode1.Visible = false;
lblCurrencyCode2.Visible = false;
//hide final prompt
grpPromptRepeat.Visible = false;
break;
} //end switch
} //end InputStates
