Drawing text over a period of time

[Charsmud]

I am trying to get text to draw one character at a time over an indeterminate period of time.  However, it seems there isn't a way to append strings using sf::Text;  any suggestions of how to do this?

[Hapax]

sf::Text text;
...
std::string showThisString;
// change showThisString here (accumulate how much text you wish to show)
text.setString(showThisString);
...
window.draw(text);