using System.Windows;
using System.Windows.Controls;

namespace HMI.UI.DpUtil
{
    public class DataGridHelper
    {
        public static DataGridColumn GetSelectedColumn(DataGrid obj)
        {
            return (DataGridColumn)obj.GetValue(SelectedColumnProperty);
        }
        public static void SetSelectedColumn(DataGrid obj, DataGridColumn value)
        {
            obj.SetValue(SelectedColumnProperty, value);
        }
        public static readonly DependencyProperty SelectedColumnProperty =
            DependencyProperty.RegisterAttached("SelectedColumn", typeof(DataGridColumn), typeof(Grid),
                new PropertyMetadata(null));

        public static bool GetShowRowNumber(DependencyObject obj)
        {
            return (bool)obj.GetValue(ShowRowNumberProperty);
        }
        public static void SetShowRowNumber(DependencyObject obj, bool value)
        {
            obj.SetValue(ShowRowNumberProperty, value);
        }

        public static readonly DependencyProperty ShowRowNumberProperty =
            DependencyProperty.RegisterAttached("ShowRowNumber", typeof(bool), typeof(DataGrid),
                new PropertyMetadata(false, OnShowRowNumberChanged));

        private static void OnShowRowNumberChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is DataGrid grid)
            {
                if (e.Property == ShowRowNumberProperty)
                {
                    if (((bool)e.NewValue))
                    {
                        grid.LoadingRow += Grid_LoadingRow;
                    }
                    else
                    {
                        grid.LoadingRow -= Grid_LoadingRow;
                    }
                }
            }
        }

        private static void Grid_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            e.Row.Header = e.Row.GetIndex() + 1;
        }
    }
}