private void opacityUp()
{
opacity += 0.05f;
opacityColor = new Microsoft.Xna.Framework.Color(opacity, opacity, opacity);
if (opacity >= 1) // done
{
GameLogicTick -= fadeHandle;
fadeHandle = null;
if (fadeFinished != null)
{
fadeFinished();
}
fadeFinished = null;
}
}
private void opacityDown(Action callback)
{
opacity -= 0.05f;
opacityColor = new Microsoft.Xna.Framework.Color(opacity, opacity, opacity);
if (opacity <= 0)
{
// call the callback, then switch to fading in
if (callback != null)
{
callback();
}
GameLogicTick -= fadeHandle;
fadeHandle = new GameTickEventHandler(e => opacityUp());
GameLogicTick += fadeHandle;
}
}
/// <summary>
/// Fades the screen to black, calls an optional callback function, and then fades back in,
/// and calls another callback function when done.
/// </summary>
/// <param name="callback">The function to call when the screen is black. Can be null.</param>
/// <param name="finished">The function to call when the transition is finished. Can be null.</param>
public void FadeTransition(Action callback, Action finished = null)
{
// if a fade in is in progress, finish that and immediately
// switch to the new fade out
if (fadeHandle != null)
{
GameLogicTick -= fadeHandle;
if (fadeFinished != null)
{
fadeFinished();
}
}
fadeHandle = new GameTickEventHandler(e => opacityDown(callback));
GameLogicTick += fadeHandle;
fadeFinished = finished;
}
/// <summary>
/// Calls a function after a given number of frames.
/// </summary>
/// <param name="callback">The callback function to call.</param>
/// <param name="progress">A function called each frame to report the progress of the delay.</param>
/// <param name="delay">The number of frames to wait before calling.</param>
public void DelayedCall(Action callback, Action <int> progress, int delay)
{
int count = 0;
GameTickEventHandler handler = e => { count++; if (progress != null)
{
progress(count);
}
};
handler += e =>
{
if (delay == count)
{
if (callback != null)
{
callback();
}
GameLogicTick -= handler;
}
};
GameLogicTick += handler;
}
private void opacityUp()
{
opacity += 0.05f;
opacityColor = new Microsoft.Xna.Framework.Color(opacity, opacity, opacity);
if (opacity >= 1) // done
{
GameLogicTick -= fadeHandle;
fadeHandle = null;
if (fadeFinished != null) fadeFinished();
fadeFinished = null;
}
}
private void opacityDown(Action callback)
{
opacity -= 0.05f;
opacityColor = new Microsoft.Xna.Framework.Color(opacity, opacity, opacity);
if (opacity <= 0)
{
// call the callback, then switch to fading in
if (callback != null) callback();
GameLogicTick -= fadeHandle;
fadeHandle = new GameTickEventHandler(e => opacityUp());
GameLogicTick += fadeHandle;
}
}
/// <summary>
/// Fades the screen to black, calls an optional callback function, and then fades back in,
/// and calls another callback function when done.
/// </summary>
/// <param name="callback">The function to call when the screen is black. Can be null.</param>
/// <param name="finished">The function to call when the transition is finished. Can be null.</param>
public void FadeTransition(Action callback, Action finished = null)
{
// if a fade in is in progress, finish that and immediately
// switch to the new fade out
if (fadeHandle != null)
{
GameLogicTick -= fadeHandle;
if (fadeFinished != null)
{
fadeFinished();
}
}
fadeHandle = new GameTickEventHandler(e => opacityDown(callback));
GameLogicTick += fadeHandle;
fadeFinished = finished;
}
