/// <summary>
///
/// </summary>
/// <param name="args"></param>
public override void Update(TickEventArgs args)
{
if (args == null)
{
throw new ArgumentNullException("args");
}
float seconds = args.SecondsElapsed;
time = Timer.SecondsElapsed;
switch (state)
{
case TextFadeState.BeforeFadeIn:
if (time >= startTime)
{
state = TextFadeState.FadeIn;
}
break;
case TextFadeState.FadeIn:
if (seconds <= (float.MaxValue / inSpeed) - alpha)
{
alpha += seconds * inSpeed;
}
else
{
alpha = float.MaxValue;
}
if (alpha >= 255)
{
alpha = 255;
state = TextFadeState.BeforeFadeOut;
}
this.Surface.Alpha = (byte)alpha;
break;
case TextFadeState.BeforeFadeOut:
if (time >= this.EndTime)
{
state = TextFadeState.FadeOut;
}
break;
case TextFadeState.FadeOut:
alpha -= seconds * outSpeed;
if (alpha <= 0)
{
alpha = 0;
state = TextFadeState.Finished;
}
this.Surface.Alpha = (byte)alpha;
break;
}
}
private void updateTransitions()
{
// Staying -> FadingOut
// This can occur by a natural wait OR if the target text has changed.
if (_currState == TextFadeState.Staying &&
(_currT >= _stayTime || !_currText.Equals(_targetText)))
{
_currState = TextFadeState.FadingOut;
_currT = 0f;
}
// FadingOut -> Hidden
if (_currState == TextFadeState.FadingOut && _currT >= fadeTime)
{
_currState = TextFadeState.Hidden;
_currT = 0f;
}
// Hidden -> FadingIn
// Requires a new target text, this also calculates the "stay time" for the new
// target text and changes the current text.
if (_currState == TextFadeState.Hidden && !_currText.Equals(_targetText))
{
_currText = _targetText;
_stayTime = _currText.Length * durationPerCharacter;
// Only transition to "fading in" if the text to display has content.
// This prevents a delay where empty text has to fade in and out before new
// text can come in.
if (!string.IsNullOrEmpty(_currText))
{
_currState = TextFadeState.FadingIn;
_currT = 0f;
}
}
// FadingIn -> Staying
if (_currState == TextFadeState.FadingIn && _currT >= fadeTime)
{
_currState = TextFadeState.Staying;
_currT = 0f;
}
}
/// <summary>
///
/// </summary>
/// <param name="args"></param>
public override void Update(TickEventArgs args)
{
if (args == null)
{
throw new ArgumentNullException("args");
}
float seconds = args.SecondsElapsed;
time = Timer.SecondsElapsed;
switch (state)
{
case TextFadeState.BeforeFadeIn:
if (time >= startTime)
{
state = TextFadeState.FadeIn;
}
break;
case TextFadeState.FadeIn:
if (seconds <= (float.MaxValue / inSpeed) - alpha)
{
alpha += seconds * inSpeed;
}
else
{
alpha = float.MaxValue;
}
if (alpha >= 255)
{
alpha = 255;
state = TextFadeState.BeforeFadeOut;
}
this.Surface.Alpha = (byte)alpha;
break;
case TextFadeState.BeforeFadeOut:
if (time >= this.EndTime)
{
state = TextFadeState.FadeOut;
}
break;
case TextFadeState.FadeOut:
alpha -= seconds * outSpeed;
if (alpha <= 0)
{
alpha = 0;
state = TextFadeState.Finished;
}
this.Surface.Alpha = (byte)alpha;
break;
}
}
