private void Button_Click(object sender, EventArgs e)
{
Button b = (Button)sender;
// remove any leading zeroes
if (result.Text == "0" || operation_pressed || equals_pressed)
{
result.Clear();
}
equals_pressed = false;
operation_pressed = false;
if (b.Text == ".")
{
if (!result.Text.Contains("."))
{
result.Text += b.Text;
}
}
else
{
result.Text += b.Text;
}
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void Clear_click(object sender, EventArgs e)
{
result.Clear();
result.Text = "0";
equation.Text = "";
value = 0;
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void Negate_Click(object sender, EventArgs e)
{
if (Double.Parse(result.Text) > 0.0)
{
result.Text = '-' + result.Text;
}
else if (Double.Parse(result.Text) < 0.0)
{
result.Text = result.Text.Remove(0, 1);
}
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void Del_click(object sender, EventArgs e)
{
if (result.Text.Length != 1 && result.Text != "0")
{
result.Text = result.Text.Remove(result.Text.Length - 1);
}
else
{
result.Text = "0";
}
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void Operator_click(object sender, EventArgs e)
{
Button b = (Button)sender;
if (value != 0)
{
// fire the equals_Click method
EqualBtn.PerformClick();
operation_pressed = true;
operation = b.Text;
equation.Text = value + " " + operation;
}
else
{
operation = b.Text;
// since value is a double
value = Double.Parse(result.Text);
operation_pressed = true;
equation.Text = value + " " + operation;
}
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void Equals_Click(object sender, EventArgs e)
{
equation.Text = "";
switch (operation)
{
case " ":
EqualBtn.PerformClick();
break;
case "\r":
EqualBtn.PerformClick();
break;
case "=":
EqualBtn.PerformClick();
break;
case "+":
result.Text = Operators.Add(value, Double.Parse(result.Text)).ToString();
break;
case "-":
result.Text = Operators.Sub(value, Double.Parse(result.Text)).ToString();
break;
case "*":
result.Text = Operators.Mult(value, Double.Parse(result.Text)).ToString();
break;
case "/":
if (result.Text == "0")
{
result.Text = "Cannot Divide by Zero";
}
else
{
result.Text = Operators.Div(value, Double.Parse(result.Text)).ToString();
}
break;
case "x^n":
result.Text = Operators.XtoN(value, Double.Parse(result.Text)).ToString();
break;
case "Sq":
result.Text = Operators.Sq(value).ToString();
break;
case "sqrt":
result.Text = Operators.Sqrt(value).ToString();
break;
case "nrt":
result.Text = Operators.NthRT(value, Double.Parse(result.Text)).ToString();
break;
default:
break;
}//end switch
equals_pressed = true;
if (result.Text == ".")
{
value = Double.Parse("0.0"); // does not print but this does avoid an exception
}
else
{
value = Double.Parse(result.Text);
}
operation = "";
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}
private void ClearEntry_Click(object sender, EventArgs e)
{
result.Text = "0";
GrabFocus.Focus(); // switches focus to a hidden label. required for \r to keypress equals
}