/// <summary>
/// Method to handle the enter key being pressed.
/// Calculates the total and then moves the curser to the right hand side of box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void enterKeyPress(object sender, KeyEventArgs e)
{
String value;
if (e.Key == Key.Enter && MathFunctions.checkLength(calcDisplayBox.Text, out value))
{
calcDisplayBox.Text = MathFunctions.calculateTotal(value);
}
else if (MathFunctions.checkLength(calcDisplayBox.Text, out value))
{
calcDisplayBox.Text = value;
}
calcDisplayBox.Select(calcDisplayBox.Text.Length, 0);
}
/// <summary>
/// Add a standard operator to the text box.
/// Before adding operator calculate the total so it is sequential
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void operatorButtonClick(object sender, RoutedEventArgs e)
{
calcDisplayBox.Text = MathFunctions.calculateTotal(calcDisplayBox.Text);
String value;
if (MathFunctions.checkLength(calcDisplayBox.Text, out value))
{
calcDisplayBox.Select(calcDisplayBox.Text.Length, 0);
calcDisplayBox.Text += ((Button)sender).Content;
}
else
{
calcDisplayBox.Text = value;
}
}
/// <summary>
/// If equals is pressed call to calculateTotal method
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void equalsButtonClick(object sender, RoutedEventArgs e)
{
calcDisplayBox.Text = MathFunctions.calculateTotal(calcDisplayBox.Text);
calcDisplayBox.Select(calcDisplayBox.Text.Length, 0);
}