///Keys
private void Form1_KeyDown(Object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Back:
Backspace?.Invoke(this, EventArgs.Empty);
equals.Focus();
break;
case Keys.Enter:
Operator = "enter";
try
{
Controls_op?.Invoke(this, EventArgs.Empty);
}
catch
{
result_window.Text = "Divide by zero -> hit C";
foreach (Control item in Controls)
{
if (item as Button != null)
{
(item as Button).Enabled = false;
}
}
reset.Enabled = true;
}
break;
case Keys.Multiply:
Operator = "*";
try
{
Binar_Operators?.Invoke(this, EventArgs.Empty);
}
catch
{
result_window.Text = "Divide by zero -> hit C";
foreach (Control item in Controls)
{
if (item as Button != null)
{
(item as Button).Enabled = false;
}
}
reset.Enabled = true;
}
break;
case Keys.Add:
Operator = "+";
try
{
Binar_Operators?.Invoke(this, EventArgs.Empty);
}
catch
{
result_window.Text = "Divide by zero -> hit C";
foreach (Control item in Controls)
{
if (item as Button != null)
{
(item as Button).Enabled = false;
}
}
reset.Enabled = true;
}
break;
case Keys.Subtract:
Operator = "-";
try
{
Binar_Operators?.Invoke(this, EventArgs.Empty);
}
catch
{
result_window.Text = "Divide by zero -> hit C";
foreach (Control item in Controls)
{
if (item as Button != null)
{
(item as Button).Enabled = false;
}
}
reset.Enabled = true;
}
break;
case Keys.Decimal:
try
{
Decimal.Parse("0" + Separator);
if (!result_window.Text.Contains(Separator))
{
result_window.Text += Separator;
Digits?.Invoke(this, EventArgs.Empty);
}
equals.Focus();
}
catch
{
Separator = ",";
if (!result_window.Text.Contains(Separator))
{
result_window.Text += Separator;
Digits?.Invoke(this, EventArgs.Empty);
}
equals.Focus();
}
break;
case Keys.Divide:
Operator = "/";
try
{
Binar_Operators?.Invoke(this, EventArgs.Empty);
}
catch
{
result_window.Text = "Divide by zero -> hit C";
foreach (Control item in Controls)
{
if (item as Button != null)
{
(item as Button).Enabled = false;
}
}
reset.Enabled = true;
}
break;
default:
if (e.KeyCode.ToString().StartsWith("NumPad"))
{
result_window.Text += e.KeyCode.ToString().Substring(6);
Digits?.Invoke(this, EventArgs.Empty);
}
if (e.KeyCode.ToString().StartsWith("D"))
{
result_window.Text += e.KeyCode.ToString().Substring(1);
Digits?.Invoke(this, EventArgs.Empty);
}
break;
}
}
private void Bspc_Click(Object sender, EventArgs e)
{
Backspace?.Invoke(this, EventArgs.Empty);
equals.Focus();
}