/// <summary>
/// Forward position request to command station
/// </summary>
private void OnRequestedColorChanged(BlockSignalColor value)
{
var cs = commandStation;
if (cs != null)
{
var pattern = GetPattern(value);
foreach (var address in Addresses)
{
cs.SendBinaryOutput(address, (pattern & 0x01) != 0);
pattern >>= 1;
}
color.Actual = color.Requested;
}
}
/// <summary>
/// Validate the given color with what is actually supported.
/// </summary>
private BlockSignalColor ValidateColor(BlockSignalColor c)
{
switch (c)
{
case BlockSignalColor.Yellow:
if (!Entity.IsYellowAvailable)
{
return(BlockSignalColor.Green);
}
break;
case BlockSignalColor.White:
if (!Entity.IsWhiteAvailable)
{
return(ValidateColor(BlockSignalColor.Yellow));
}
break;
}
return(c);
}
/// <summary>
/// Gets the bit pattern to use for the given color.
/// </summary>
private int GetPattern(BlockSignalColor color)
{
var entity = Entity;
switch (color)
{
case BlockSignalColor.Red:
return(entity.RedPattern);
case BlockSignalColor.Green:
return(entity.GreenPattern);
case BlockSignalColor.Yellow:
return(entity.IsYellowAvailable ? entity.YellowPattern : GetPattern(BlockSignalColor.Green));
case BlockSignalColor.White:
return(entity.IsWhiteAvailable ? entity.WhitePattern : GetPattern(BlockSignalColor.Yellow));
default:
throw new ArgumentException("Unknown color: " + color);
}
}
/// <summary>
/// Gets the next color that is supported by my entity.
/// </summary>
public BlockSignalColor GetNextColor(BlockSignalColor current)
{
var entity = Entity;
switch (current)
{
case BlockSignalColor.Red:
if (entity.IsYellowAvailable)
{
return(BlockSignalColor.Yellow);
}
return(GetNextColor(BlockSignalColor.Yellow));
case BlockSignalColor.Yellow:
if (entity.IsGreenAvailable)
{
return(BlockSignalColor.Green);
}
return(GetNextColor(BlockSignalColor.Green));
case BlockSignalColor.Green:
if (entity.IsWhiteAvailable)
{
return(BlockSignalColor.White);
}
return(GetNextColor(BlockSignalColor.White));
case BlockSignalColor.White:
if (entity.IsRedAvailable)
{
return(BlockSignalColor.Red);
}
return(GetNextColor(BlockSignalColor.Red));
default:
return(BlockSignalColor.Red);
}
}
