qController/qController.Standard/Classes/Cell/QLevelsCell.cs

using System.Collections.Generic;
using Xamarin.Forms;

namespace qController.Cell
{
    public class QLevelsCell : Frame
    {

        public List<double> levels;
        public string activeCue;
        public Slider mainSlider;
        //public Slider leftSlider;
        //public Slider rightSlider;
        public Label mainLabel;
        //public Label rightLabel;
        //public Label leftLabel;

        public List<Slider> sliders = new List<Slider>();
        public List<Label> sliderLabels = new List<Label>();

        public QLevelsCell()
        {
            Padding = new Thickness(5);
            CornerRadius = 20;
            BorderColor = Color.Black;
            HasShadow = true;
            BackgroundColor = Color.FromHex("D8D8D8");
            IsVisible = false;

            int numberOfChannelsVisible = 6;
            //highlight for testing
            //BackgroundColor = Color.Red;


            Grid mainG = new Grid
            {
                Padding = new Thickness(0),
                RowDefinitions = {
                    new RowDefinition{Height = GridLength.Star},
                },
                ColumnDefinitions = {
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)},
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)},
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)},
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)},
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)},
                    new ColumnDefinition{Width = new GridLength(1,GridUnitType.Star)}
                }
            };

            mainSlider = new Slider
            {
                Minimum = -60,
                Maximum = 12
            };


            for (int i = 0; i < numberOfChannelsVisible; i++)
            {
                var sliderToAdd = new Slider
                {
                    Minimum = -60,
                    Maximum = 12
                };

                var labelToAdd = new Label
                {
                    Text = $"{i + 1}:",
                    VerticalTextAlignment = TextAlignment.Center,
                    HorizontalTextAlignment = TextAlignment.Center
                };

                var valueLabelToAdd = new Label
                {
                    Text = "",
                    VerticalTextAlignment = TextAlignment.Center,
                    HorizontalTextAlignment = TextAlignment.Center
                };

                mainG.RowDefinitions.Add(new RowDefinition { Height = GridLength.Star });
                mainG.Children.Add(sliderToAdd, 1, i + 1);
                Grid.SetColumnSpan(sliderToAdd, 4);
                mainG.Children.Add(labelToAdd, 0, i + 1);
                mainG.Children.Add(valueLabelToAdd, 5, i + 1);

                sliders.Add(sliderToAdd);
                sliderLabels.Add(valueLabelToAdd);
            }

            mainLabel = new Label
            {
                Text = "M:",
                VerticalTextAlignment = TextAlignment.Center,
                HorizontalTextAlignment = TextAlignment.Center
            };

            mainG.Children.Add(mainSlider, 1, 0);
            Grid.SetColumnSpan(mainSlider, 4);
            mainG.Children.Add(mainLabel, 0, 0);

            Content = mainG;
            Margin = new Thickness(10);
        }

        public void UpdateLevels(List<double> lin_levels)
        {
            levels = lin_levels;
            if (mainSlider != null)
            {
                mainSlider.Value = levels[0];
            }
            for (int i = 0; i < sliders.Count; i++)
            {
                Slider slider = sliders[i];
                Label label = sliderLabels[i];
                slider.Value = levels[i + 1];
                label.Text = $"{levels[i + 1]}";
            }
        }
    }
}