// start the text label scrolling with the specified text
public bool StartScroll(string stringTableKey, float newTime, ScrollEndDelegate callback)
{
if (null == _root)
{
_root = NGUITools.FindInParents <UIRoot>(_textLabel.gameObject);
}
string text;
if (null != _root && null != _textLabel && !string.IsNullOrEmpty(stringTableKey) && GlobalStringData.Instance.GeneralStringTable.TryGetValue(stringTableKey, out text))
{
if (null != _onScrollEnd)
{
_onScrollEnd(CalculateCompletion());
_onScrollEnd = null;
}
_onScrollEnd = callback;
_textLabel.text = text;
const float Cut = 0f;
_textLabelFader.FadeToOpaque(Cut);
_yScreenPosition = 0f;
_speedPerSecond = 1f / newTime;
SetTextPosition(_textLabel, _yScreenPosition);
return(true);
}
return(false);
}
private void Update()
{
if (IsActive())
{
Scroll();
SetTextPosition(_textLabel, _yScreenPosition);
float completion = CalculateCompletion();
if (completion >= 1f) // if the UILabel has scrolled off the top of the screen
{
const float Cut = 0f;
_textLabelFader.FadeToTransparent(Cut);
}
_textLabelFader.Update(); // this may be fading out the label
if (!IsActive() && null != _onScrollEnd) // if we have faded out or got to the top of the screen
{
_onScrollEnd(completion);
_onScrollEnd = null;
}
}
}
