namespace Yw.WinFrmUI.HydroL2d
{
    /// <summary>
    /// 管网面板
    /// </summary>
    public partial class NetworkPanel : Panel
    {
        public NetworkPanel()
        {
            InitializeComponent();

            #region 防止闪烁

            SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            SetStyle(ControlStyles.DoubleBuffer, true);
            SetStyle(ControlStyles.UserPaint, true);

            #endregion

            //设置允许的最小尺寸
            this.MinimumSize = new Size(10, 10);

        }


        private Network _network = null;//管网
        private Bitmap _cache = null;//绘制缓存
        private float _zoomMin = 1;//最小缩放层级
        private float _zoomMax = 3200;//最大缩放层级
        private float _zoom = 1;//当前缩放层级
        private float _dxo = 0;//x偏移量
        private float _dyo = 0;//y偏移量

        /// <summary>
        /// 是否初始化
        /// </summary>
        public bool Initialized => _network != null;




        /// <summary>
        /// 初始化
        /// </summary>
        public virtual void Initial(Network network)
        {
            _network = network;
            ZoomAll();
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            if (!Initialized)
            {
                return;
            }
            try
            {
                e.Graphics.PageUnit = GraphicsUnit.Pixel;
                e.Graphics.InterpolationMode = InterpolationMode.High;
                e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
                e.Graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
                e.Graphics.PageScale = _zoom;
                e.Graphics.TranslateTransform(_dxo, _dyo);
                e.Graphics.ScaleTransform(1, -1);
            }
            catch
            {
                return;
            }
            _network.Draw(e.Graphics);
        }

        /// <summary>
        /// 界面尺寸发生改变
        /// </summary>
        /// <param name="eventargs"></param>
        protected override void OnResize(EventArgs eventargs)
        {
            base.OnResize(eventargs);
            ZoomAll();
        }

        /// <summary>
        /// 释放资源
        /// </summary>
        protected virtual void DisposeResources()
        {
            if (_cache != null)
            {
                _cache.Dispose();
            }

        }


        /// <summary>
        /// 自适应
        /// </summary>
        public void ZoomAll()
        {
            if (!Initialized)
            {
                return;
            }

            float w = Width;
            float h = Height;
            var networkBounds = _network.GetBounds();
            if (networkBounds.IsEmpty)
            {
                return;
            }
            _zoom = networkBounds.Width / networkBounds.Height < w / h ?
                h / networkBounds.Height :
                w / networkBounds.Width;


            _dxo = -networkBounds.X;
            _dyo = networkBounds.Bottom;

            _zoom *= 0.95f;

            _dxo += w * 0.5f / _zoom - networkBounds.Width * 0.5f;
            _dyo += h * 0.5f / _zoom - networkBounds.Height * 0.5f;

            Invalidate();
        }













    }
}