///////////////////////////////////////////////////////////////////////////////
//Copyright (c) 2016, 北京探索者软件公司
//All rights reserved.       
//文件名称: GridCellSingleClickEditBehavior.cs
//文件描述: 窗格单击编辑行为
//创 建 者: xls
//创建日期: 2017-1-11
//版 本 号：1.0.0.0
////////////////////////////////////////////////////////////////////////////////

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;

namespace FWindSoft.Wpf.Behaviors
{
    public class GridCellSingleClickEditBehavior : Behavior<UIElement>
    {
        protected override void OnAttached()
        {
            base.OnAttached();
            this.AssociatedObject.PreviewMouseLeftButtonDown += AssociatedObject_PreviewMouseLeftButtonDown;
        }

        protected override void OnDetaching()
        {
            base.OnDetaching();
            this.AssociatedObject.PreviewMouseRightButtonDown -= AssociatedObject_PreviewMouseLeftButtonDown;
        }

        private void AssociatedObject_PreviewMouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            UIElement uiel = e.OriginalSource as UIElement;
            if (uiel == null)
                return;
            var cell = uiel.GetParentType<DataGridCell>();
            if (cell == null)
                return;
            if (!cell.IsEditing && !cell.IsReadOnly)
            {
                if (!cell.IsFocused)
                    cell.Focus();
                DataGrid grid = cell.GetParentType<DataGrid>();
                if (grid != null)
                {
                    if (grid.SelectionUnit != DataGridSelectionUnit.FullRow)
                    {
                        if (!cell.IsSelected)
                        {
                            cell.IsSelected = true;
                        }
                    }
                    else
                    {
                        DataGridRow row = cell.GetParentType<DataGridRow>();
                        if (row != null && !row.IsSelected)
                        {
                            row.IsSelected = true;
                        }
                    }
                }
            }
        }
    }
}