using DevExpress.XtraGrid.Columns;
using System.Drawing;
using System.Windows.Forms;

namespace ZJ_BYD.Untils
{
    public class ViewStyleHelper
    {
        bool enable;
        public bool Enable
        {
            get { return enable; }
            set
            {
                enable = value;
                UnRegisterEvent();
                if (enable)
                {
                    RegisterEvent();
                }
                else
                {
                    View.RefreshData();
                }
            }
        }

        bool byRow;

        /// <summary>
        /// 真为行，假为单元格
        /// </summary>
        public bool ByRow
        {

            get { return byRow; }

            set

            {

                byRow = value;

                UnRegisterEvent();

                if (enable)

                    RegisterEvent();

            }

        }

        public DevExpress.XtraGrid.Views.Grid.GridView View { get; private set; }

        /// <summary>
        /// 当前列
        /// </summary>
        GridColumn currentCol;

        /// <summary>
        /// 当前行
        /// </summary>
        int currentRowHandle;

        public ViewStyleHelper(DevExpress.XtraGrid.Views.Grid.GridView view, bool byRow = true)
        {
            View = view;
            this.byRow = byRow;
            Enable = true;
            view.MouseLeave += (s, e) =>
            {
                currentCol = null;
                currentRowHandle = int.MinValue;
                view.RefreshData();
            };
        }

        void RegisterEvent()
        {
            View.MouseMove += OnMouseMove;
            if (!byRow)
                View.RowCellStyle += OnRowCellStyle;
            else
            {
                View.RowStyle += OnRowStyle;
            }
        }

        void UnRegisterEvent()
        {
            View.MouseMove -= OnMouseMove;
            View.RowCellStyle -= OnRowCellStyle;
            View.RowStyle -= OnRowStyle;
        }

        private void OnMouseMove(object sender, MouseEventArgs e)
        {
            var view = sender as DevExpress.XtraGrid.Views.Grid.GridView;
            var info = view.CalcHitInfo(e.Location);
            bool refresh = false;
            if (currentCol != info.Column || currentRowHandle != info.RowHandle)
            {
                refresh = true;
            }
            if (info.InDataRow)
            {
                currentCol = info.Column;
                currentRowHandle = info.RowHandle;
            }
            else
            {
                currentCol = null;
                currentRowHandle = int.MinValue;
            }
            if (refresh)
                view.RefreshData();
        }

        private void OnRowStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowStyleEventArgs e)
        {
            if (e.RowHandle == currentRowHandle)
            {
                e.Appearance.BackColor = Color.FromArgb(108, 178, 235);
                e.HighPriority = true;
            }
        }

        private void OnRowCellStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowCellStyleEventArgs e)
        {
            if (e.Column == currentCol && e.RowHandle == currentRowHandle)
            {
                e.Appearance.BackColor = Color.FromArgb(108, 178, 235);

            }
        }
    }
}