private void PutContent(object sender, RoutedEventArgs e)
{
Button btn = (Button)sender;
string content = btn.Content.ToString();
if (ExpressionBox.SelectedText.Length > 0)
{
ExpressionBox.SelectedText = content;
Regex trimmer = new Regex(@"\s\s+");
ExpressionBox.Text = trimmer.Replace(ExpressionBox.Text, " ");
ExpressionBox.Select(0, 0);
int caretLength = ExpressionBox.Text.Length;
ExpressionBox.CaretIndex = caretLength;
}
else
{
string[] operators = { "+", "-", "*", "/", "%", "^", "√" };
if (operators.Contains(content))
{
ExpressionBox.Text = ExpressionBox.Text.Insert(ExpressionBox.CaretIndex, $" {content} ");
int caretLength = ExpressionBox.Text.Length;
ExpressionBox.CaretIndex = caretLength + 3;
}
else
{
ExpressionBox.Text = ExpressionBox.Text.Insert(ExpressionBox.CaretIndex, content);
int caretLength = ExpressionBox.Text.Length;
ExpressionBox.CaretIndex = caretLength + 1;
}
Regex trimmer = new Regex(@"\s\s+");
ExpressionBox.Text = trimmer.Replace(ExpressionBox.Text, " ");
}
ExpressionBox.Focus();
}
private void SetFocus()
{
ExpressionBox.Focus();
ExpressionBox.Select(ExpressionBox.Text.Length, 0);
ExpressionBox.ScrollToEnd();
}
