//private void numberButton_Click(object sender, EventArgs e)
//{
// calculationManager.NumberPressed((Button)sender);
//}
//private void backspaceButton_Click(object sender, EventArgs e)
//{
// calculationManager.BackspacePressed();
//}
//private void cancelButton_Click(object sender, EventArgs e)
//{
// calculationManager.Reset();
//}
//private void commaButton_Click(object sender, EventArgs e)
//{
// calculationManager.PreviousButton = commaButton;
//}
//private void operationButton_Click(object sender, EventArgs e)
//{
// Form1 form = (Form1)ParentForm;
// calculationManager.OperationPressed(form, (Button)sender);
//}
//private void equalButton_Click(object sender, EventArgs e)
//{
// Form1 form = (Form1)ParentForm;
// calculationManager.EqualPressed(form);
//}
//private void signButton_Click(object sender, EventArgs e)
//{
// calculationManager.SignPressed();
//}
private void numberButton_MouseClick(object sender, MouseEventArgs e)
{
calculationManager.NumberPressed((Button)sender);
calculationTextBox.Focus();
}