AppliStation/AppliStation.Util/ListViewItemSortComparer.cs

   1 using System;\r
   2 using System.Drawing;\r
   3 using System.Windows.Forms;\r
   4 using NaGet.Packages;\r
   5 using NaGet.Packages.Install;\r
   6 using System.IO;\r
   7 using System.Collections.Generic;\r
   8 \r
   9 namespace AppliStation.Util\r
  10 {\r
  11         /// <summary>\r
  12         /// ListViewのソートをカプセル化するためのクラス\r
  13         /// </summary>\r
  14         class ListViewItemSortComparer : System.Collections.IComparer\r
  15         {\r
  16                 SortOrder order = SortOrder.Ascending;\r
  17                 \r
  18                 ColumnHeader column = null;\r
  19                 \r
  20                 /// <summary>\r
  21                 /// コンストラクタ\r
  22                 /// </summary>\r
  23                 public ListViewItemSortComparer()\r
  24                 {\r
  25                 }\r
  26                 \r
  27                 /// <summary>\r
  28                 /// ソートの方向。昇順か?降順か?\r
  29                 /// </summary>\r
  30                 public SortOrder Order {\r
  31                         get { return order; }\r
  32                         set { order = value; }\r
  33                 }\r
  34                 \r
  35                 /// <summary>\r
  36                 /// 選択しているコラムを取得・設定する。\r
  37                 /// nullを設定するとソートが解除される。\r
  38                 /// </summary>\r
  39                 public ColumnHeader Column {\r
  40                         get { return column; }\r
  41                         set {\r
  42                                 column = value;\r
  43                                 \r
  44                                 if (value == null || value.Index < 0) {\r
  45                                         order = SortOrder.None;\r
  46                                 }\r
  47                         }\r
  48                 }\r
  49                 \r
  50                 /// <summary>\r
  51                 /// 選択しているコラムのインデックスを返す。選択されていないときは-1を返す。\r
  52                 /// </summary>\r
  53                 public int ColumnIndex {\r
  54                         get {\r
  55                                 return (column != null)? column.Index : -1;\r
  56                         }\r
  57                 }\r
  58                 \r
  59                 public int Compare(object x, object y)\r
  60                 {\r
  61                         int columnIndex = this.ColumnIndex;\r
  62                         int result = 0;\r
  63                         \r
  64                         if (columnIndex >= 0 && order != SortOrder.None) {\r
  65                                 ListViewItem itemx = (ListViewItem) x;\r
  66                                 ListViewItem itemy = (ListViewItem) y;\r
  67                                 \r
  68                                 result = string.Compare(itemx.SubItems[columnIndex].Text,\r
  69                                                         itemy.SubItems[columnIndex].Text);\r
  70                                 \r
  71                                 if (order == SortOrder.Descending) {\r
  72                                         result = -result;\r
  73                                 }\r
  74                         }\r
  75                         \r
  76                         return result;\r
  77                 }\r
  78         }\r
  79 }\r