BeatLyrics/BeatLyrics.Tool/Dialogs/PlotDialog.cs

using BeatLyrics.Tool.Utils;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace BeatLyrics.Tool.Dialogs
{
    internal partial class PlotDialog : Form
    {
        private readonly SpectrumAnalyzer.SaResult[] _items;
        private readonly int _blockInMs;

        public PlotDialog(SpectrumAnalyzer.SaResult[] items, int blockInMs)
        {
            _items = items;
            _blockInMs = blockInMs;
            InitializeComponent();
            SelectTrackBar.Maximum = items.Length - 1;
            UpdateChart();
        }

        private void UpdateChart()
        {
            MainChart.Series["Series1"].Points.Clear();
            var item = _items[SelectTrackBar.Value];

            var maxFreq = item.FreqAxis.Max();
            var rngFreqMax = maxFreq * (MaxFreqTrackBar.Value / 10000.0);
            var rngFreqMin = maxFreq * (MinFreqTrackBar.Value / 10000.0);

            var minValue = item.Values.Min();
            var rngValue = item.Values.Max() - minValue;

            var rngValueMin = minValue + rngValue * (MinValueTrackBar.Value / 10000.0);
            var rngValueMax = minValue + rngValue * (MaxValueTrackBar.Value / 10000.0);

            var axis = new List<double>();
            var values = new List<double>();

            for (var i = 0; i < item.FreqAxis.Length; i++)
            {
                if (item.FreqAxis[i] >= rngFreqMin && item.FreqAxis[i] <= rngFreqMax
                 && item.Values[i] >= rngValueMin && item.Values[i] <= rngValueMax)
                {
                    axis.Add(item.FreqAxis[i]);
                    values.Add(item.Values[i]);
                }
            }

            InfoLabel.Text = $"Pos:{TimeSpan.FromMilliseconds(SelectTrackBar.Value * _blockInMs)}";

            MainChart.Series["Series1"].Points.DataBindXY(axis, values);
        }

        private void SelectTrackBar_Scroll(object sender, EventArgs e)
        {
            UpdateChart();
            OggAudioPlayer.Position = TimeSpan.FromMilliseconds(_blockInMs * SelectTrackBar.Value);
        }

        private void MaxTrackBar_Scroll(object sender, EventArgs e) => UpdateChart();

        private void MinTrackBar_Scroll(object sender, EventArgs e) => UpdateChart();

        private void MinValueTrackBar_Scroll(object sender, EventArgs e) => UpdateChart();

        private void MaxValueTrackBar_Scroll(object sender, EventArgs e) => UpdateChart();

        private void SelectTrackBar_MouseDown(object sender, MouseEventArgs e) => OggAudioPlayer.Play();

        private void SelectTrackBar_MouseUp(object sender, MouseEventArgs e) => OggAudioPlayer.Stop();

        private void MainChart_Click(object sender, EventArgs e) =>
            MainChart.Series["Series1"].ChartType = MainChart.Series["Series1"].ChartType == SeriesChartType.Line
                ? SeriesChartType.Column
                : SeriesChartType.Line;
    }
}