/// <summary>
/// Performs a validations when the user tries to change some of the units skill points.
/// The new value (value + change) of the skill must be between the mininum and maximum value
/// for that skill and team must still have points left to expend.
/// </summary>
/// <param name="value"></param>
/// <param name="maxValue"></param>
/// <param name="minValue"></param>
/// <param name="change"></param>
/// <returns></returns>
private double TryChangeDouble(double value, double maxValue, double minValue, double change)
{
var newVal = value + change;
var newPoints = Points + (change < 0 ? 1 : -1);
if (newVal <= maxValue && newVal >= minValue && newPoints >= 0 && newPoints <= MainViewModel.MAX_TEAM_POINTS)
{
value = newVal;
Points = newPoints;
UsedPoints += (change < 0 ? -1 : 1);
ObserverHelper <MainViewModel, int> .NotifyObservers(this, Points);
}
return(value);
}
/// <summary>
/// When a unit dies, the MainViewModel unsubscribes the unit events, restores unit points to the
/// total of the team points and remove it from the field of battle.
/// </summary>
/// <param name="sender">The dead unit</param>
/// <param name="Team">The team of the dead unit</param>
private void Unit_UnitDied(object sender, UnitTeam Team)
{
var unit = sender as UnitViewModel;
unit.UnitAttack -= Unit_UnitAttack;
unit.UnitDied -= Unit_UnitDied;
if (Team == UnitTeam.Red)
{
ListRedUnits.Remove(unit);
ObserverHelper <MainViewModel, int> .NotifyObservers(unit, RedPoints + unit.UsedPoints);
}
else
{
ListBlueUnits.Remove(unit);
ObserverHelper <MainViewModel, int> .NotifyObservers(unit, BluePoints + unit.UsedPoints);
}
}