HC_APTBS/ViewModels/PressureTraceChartViewModel.cs

using SkiaSharp;

namespace HC_APTBS.ViewModels
{
    /// <summary>
    /// Container ViewModel holding two real-time pressure traces:
    /// one for P1 (bench oil pressure) and one for P2 (analogue sensor 2).
    /// Reuses <see cref="SingleFlowChartViewModel"/> — the chart primitive is
    /// identical, only the series colours and titles differ.
    /// </summary>
    public sealed class PressureTraceChartViewModel
    {
        /// <summary>Chart for P1 (red line).</summary>
        public SingleFlowChartViewModel P1 { get; }
            = new("P1 (bar)", new SKColor(0xD6, 0x28, 0x28));

        /// <summary>Chart for P2 (cyan line).</summary>
        public SingleFlowChartViewModel P2 { get; }
            = new("P2 (bar)", new SKColor(0x00, 0xB4, 0xD8));

        /// <summary>
        /// Appends a sample pair to both traces.
        /// Must be called on the UI thread.
        /// </summary>
        public void AddSamples(double p1, double p2)
        {
            P1.AddValue(p1);
            P2.AddValue(p2);
        }

        /// <summary>Clears both traces.</summary>
        public void Clear()
        {
            P1.Clear();
            P2.Clear();
        }
    }
}