/* called when a story is first loaded, and whenever a button
* is clicked while the StoryState is on a given page */
private void UpdateButtons()
{
var displays = state.GetButtonDisplays();
for (int i = 0; i < buttonCount; i++)
{
var text = displays[i];
if (text == null)
{
buttons[i].Visibility = Visibility.Hidden;
}
else
{
buttons[i].Content = text;
buttons[i].Visibility = Visibility.Visible;
}
}
}
