JD2022-TU1/main/tools/framework/JD.Application.TeaBox/View/WindowLess/LoopWidget.cs

using System.Drawing;
using JD.Audio.SoundPlayer;
using JD.Kernel.Structs;
using JD.Sequencers.Windowlesses;
using TeaBox;
using TeaBox.Core.Source.Gui;

namespace JD.Application.View.WindowLess
{
    /// <summary>
    /// Responsible of painting a loop indicator
    /// </summary>
    public class LoopWidget : WindowlessControl, IResizable
    {
        private readonly PlayerLoop _model;
        private readonly global::JD.Sequencers.Times.Timeline _timeline;
        private readonly Brush _boundsBrush = new SolidBrush(Color.FromArgb(75, Color.DodgerBlue));

        public LoopWidget(PlayerLoop model, global::JD.Sequencers.Times.Timeline timeline)
        {
            _model = model;
            _timeline = timeline;
            _model.RangeChanged += updateBounds;
            _timeline.PixelsPerTimeChanged += updateBounds;
            _timeline.TimeOffsetChanged += updateBounds;

            updateBounds(null, null);
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);

            _model.RangeChanged -= updateBounds;
            _timeline.PixelsPerTimeChanged -= updateBounds;
            _timeline.TimeOffsetChanged -= updateBounds;
        }

        void updateBounds(object sender, System.EventArgs e)
        {
            if (Parent != null && _model.Range.HasValue)
            {
                float min = _timeline.TimeToPixel(_model.Range.Value.Min);
                float max = _timeline.TimeToPixel(_model.Range.Value.Max);

                var bounds = Bounds;
                bounds.Y = Parent.Bounds.Y;
                bounds.Height = Parent.Bounds.Height;
                bounds.X = (int) min;
                bounds.Width = (int)(max - min);
                Bounds = bounds;
                IsVisible = true;
            }
            else if (IsVisible)
            {
                Invalidate();
                IsVisible = false;
            }
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            base.OnPaint(e);

            if (IsVisible)
            {
                e.Graphics.FillRectangle(_boundsBrush, Bounds);
            }
        }

        #region Resize/Move

        public bool IsMoveAllowed
        {
            get { return true; }
        }

        public void Snap_Self(float originalDelta, ref float snappedDelta, ref float diff)
        {
        }

        public void Snap_Bounds(float originalDelta, ref float snappedDelta, ref float diff)
        {
        }

        public void Move(float delta)
        {
            if (_model.Range.HasValue)
            {
                _model.Range = new Range<float>(_model.Range.Value.Min + delta, _model.Range.Value.Max + delta);
            }
        }

        public void Resize(Edge resizeEdge, float delta)
        {
            if (_model.Range.HasValue)
            {
                if (resizeEdge == Edge.Left)
                {
                    _model.Range = new Range<float>(_model.Range.Value.Min + delta, _model.Range.Value.Max);
                }
                else if (resizeEdge == Edge.Right)
                {
                    _model.Range = new Range<float>(_model.Range.Value.Min + delta, _model.Range.Value.Max);
                }
            }
        }

        public bool IsResizeAllowed { get { return true; } }

        public void ResizeByValue(Edge resizeEdge, float value)
        {
        }

        #endregion
    }
}