/// <summary>
/// Sets the percent of a party in the population group equal to the desired value.
/// It will take shares from all others proportionally.
/// </summary>
/// <param name="pol">The political group we are setting.</param>
/// <param name="percent">The percent we are setting it to.</param>
public void SetPartyPercent(PoliticalGroup pol, double percent)
{
if (percent <= 0 || percent > 1)
{
throw new ArgumentOutOfRangeException("Percent must be greater than 0 or less than or equal to 1.");
}
if (!PoliticalBreakdown.Any(x => x.PoliticalGroup.Id == pol.Id))
{
PoliticalBreakdown.Add(new PoliticalBreakdown
{
ParentId = Id,
Percent = 0,
PoliticalGroupId = pol.Id
});
}
double oldPercent = PoliticalBreakdown
.Single(x => x.PoliticalGroupId == pol.Id)
.Percent;
double add = (oldPercent - percent) / (percent - 1);
PoliticalBreakdown
.Single(x => x.PoliticalGroupId == pol.Id)
.Percent += add;
var newSum = PolPercent();
foreach (var group in PoliticalBreakdown)
{
group.Percent = group.Percent / newSum;
}
}
public void ShiftPartyPercent(PoliticalGroup pol, double percent)
{
if (!PoliticalBreakdown.Any(x => x.PoliticalGroup == pol))
{
PoliticalBreakdown.Add(new PoliticalBreakdown
{
ParentId = Id,
Percent = 0,
PoliticalGroupId = pol.Id
});
}
PoliticalBreakdown.Single(x => x.PoliticalGroupId == pol.Id)
.Percent += percent;
var newSum = PolPercent();
foreach (var group in PoliticalBreakdown)
{
group.Percent = group.Percent / newSum;
}
}
private double PolPercent()
{
return(PoliticalBreakdown.Sum(x => x.Percent));
}