private void RemoveBalloon(Balloon balloon)
{
// remove event delegate handler for Popped even for this balloon
balloon.Popped -= this.PoppedEventHandler;
_balloonDrawAnimate -= balloon.DrawAndAnimate;
// Find balloon in ArrayList for removal and reset of active balloon
int index = _balloons.IndexOf(balloon);
if (index >= 0)
{
if (_balloons[index] == _activeBalloon) _activeBalloon = null;
_balloons.RemoveAt(index);
// raise OnNoInfo event
OnNoInfo(balloon, EventArgs.Empty);
}
}
// Private methods
private Balloon CreateBalloon()
{
// Randomly set growth and lift rates, and create a balloon
int growthRate = _random.Next(10, 41);
int liftRate = _random.Next(1, 6);
Balloon balloon = new Balloon(new Point(_random.Next(_boardSize.Width - 20), _boardSize.Height),
new Size(20, 20), _defaultColor, growthRate, liftRate);
// Add event handler to Popped event for each balloon
balloon.Popped += new EventHandler(PoppedEventHandler);
// Add balloon drawing and animation method to our delegate
_balloonDrawAnimate += balloon.DrawAndAnimate;
return balloon;
}