mcs/class/System.Web/System.Web.UI.WebControls/RadioButtonList.cs

   1 //
   2 // System.Web.UI.WebControls.RadioButtonList.cs
   3 //
   4 // Authors:
   5 //   Gaurav Vaish (gvaish@iitk.ac.in)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Gaurav Vaish (2002)
   9 // (C) 2003 Andreas Nahr
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 \r
  33 using System;\r
  34 using System.Collections.Specialized;\r
  35 using System.ComponentModel;\r
  36 using System.Globalization;\r
  37 using System.Web;\r
  38 using System.Web.UI;\r
  39 \r
  40 namespace System.Web.UI.WebControls\r
  41 {\r
  42         [ValidationProperty("SelectedItem")]\r
  43         public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler\r
  44         {\r
  45                 private bool  selectionIndexChanged;\r
  46                 private short  tabIndex;\r
  47 \r
  48                 public RadioButtonList(): base()\r
  49                 {\r
  50                         selectionIndexChanged = false;\r
  51                 }\r
  52
  53                 [DefaultValue (-1), Bindable (true), WebCategory ("Layout")]
  54                 [WebSysDescription ("The border left within a RadioButton.")]\r
  55                 public virtual int CellPadding\r
  56                 {\r
  57                         get\r
  58                         {\r
  59                                 if(ControlStyleCreated)\r
  60                                 {\r
  61                                         return (int)(((TableStyle)ControlStyle).CellPadding);\r
  62                                 }\r
  63                                 return -1;\r
  64                         }\r
  65                         set {
  66                                 if (value < -1)
  67                                         throw new ArgumentOutOfRangeException ("value", "CellPadding value has to be -1 for 'not set' or > -1.");\r
  68                                 ((TableStyle)ControlStyle).CellPadding = value;\r
  69                         }\r
  70                 }\r
  71
  72                 [DefaultValue (-1), Bindable (true), WebCategory ("Layout")]
  73                 [WebSysDescription ("The border left between RadioButtons.")]\r
  74                 public virtual int CellSpacing\r
  75                 {\r
  76                         get\r
  77                         {\r
  78                                 if(ControlStyleCreated)\r
  79                                 {\r
  80                                         return (int)(((TableStyle)ControlStyle).CellSpacing);\r
  81                                 }\r
  82                                 return -1;\r
  83                         }\r
  84                         set {
  85                                 if (value < -1)
  86                                         throw new ArgumentOutOfRangeException ("value", "CellSpacing value has to be -1 for 'not set' or > -1.");\r
  87                                 ((TableStyle)ControlStyle).CellSpacing = value;\r
  88                         }\r
  89                 }\r
  90
  91                 [DefaultValue (0), Bindable (true), WebCategory ("Layout")]
  92                 [WebSysDescription ("The number of columns that should be used to display the RadioButtons.")]\r
  93                 public virtual int RepeatColumns\r
  94                 {\r
  95                         get\r
  96                         {\r
  97                                 object o = ViewState["RepeatColumns"];\r
  98                                 if(o != null)\r
  99                                         return (int)o;\r
 100                                 return 0;\r
 101                         }\r
 102                         set {\r
 103                                 if (value < 0)\r
 104                                         throw new ArgumentOutOfRangeException ("value", "RepeatColumns value has to be 0 for 'not set' or > 0.");\r
 105                                 ViewState["RepeatColumns"] = value;\r
 106                         }\r
 107                 }\r
 108
 109                 [DefaultValue (typeof (RepeatDirection), "Vertical"), Bindable (true), WebCategory ("Layout")]
 110                 [WebSysDescription ("The direction that is followed when doing the layout.")]\r
 111                 public virtual RepeatDirection RepeatDirection\r
 112                 {\r
 113                         get\r
 114                         {\r
 115                                 object o = ViewState["RepeatDirection"];\r
 116                                 if(o != null)\r
 117                                         return (RepeatDirection)o;\r
 118                                 return RepeatDirection.Vertical;\r
 119                         }\r
 120                         set\r
 121                         {\r
 122                                 if(!Enum.IsDefined(typeof(RepeatDirection), value))\r
 123                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 124                                 ViewState["RepeatDirection"] = value;\r
 125                         }\r
 126                 }\r
 127
 128                 [DefaultValue (typeof (RepeatLayout), "Table"), Bindable (true), WebCategory ("Layout")]
 129                 [WebSysDescription ("The method used to create the layout.")]\r
 130                 public virtual RepeatLayout RepeatLayout\r
 131                 {\r
 132                         get\r
 133                         {\r
 134                                 object o = ViewState["RepeatLayout"];\r
 135                                 if(o != null)\r
 136                                         return (RepeatLayout)o;\r
 137                                 return RepeatLayout.Table;\r
 138                         }\r
 139                         set\r
 140                         {\r
 141                                 if(!Enum.IsDefined(typeof(RepeatLayout), value))\r
 142                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 143                                 ViewState["RepeatLayout"] = value;\r
 144                         }\r
 145                 }\r
 146
 147                 [DefaultValue (typeof (TextAlign), "Right"), Bindable (true), WebCategory ("Appearance")]
 148                 [WebSysDescription ("The alignment of the RadioButton text.")]\r
 149                 public virtual TextAlign TextAlign\r
 150                 {\r
 151                         get\r
 152                         {\r
 153                                 object o = ViewState["TextAlign"];\r
 154                                 if(o != null)\r
 155                                         return (TextAlign)o;\r
 156                                 return TextAlign.Right;\r
 157                         }\r
 158                         set\r
 159                         {\r
 160                                 if(!Enum.IsDefined(typeof(TextAlign), value))\r
 161                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 162                                 ViewState["TextAlign"] = value;\r
 163                         }\r
 164                 }\r
 165 \r
 166                 protected override Style CreateControlStyle()\r
 167                 {\r
 168                         return new TableStyle(ViewState);\r
 169                 }\r
 170 \r
 171                 protected override void Render(HtmlTextWriter writer)\r
 172                 {\r
 173                         RepeatInfo info = new RepeatInfo();\r
 174                         Style cStyle = (ControlStyleCreated ? ControlStyle : null);\r
 175                         bool dirty = false;\r
 176                         tabIndex = TabIndex;\r
 177                         if(tabIndex != 0)\r
 178                         {\r
 179                                 dirty = !ViewState.IsItemDirty("TabIndex");\r
 180                                 TabIndex = 0;\r
 181                         }\r
 182                         info.RepeatColumns = RepeatColumns;\r
 183                         info.RepeatDirection = RepeatDirection;\r
 184                         info.RepeatLayout = RepeatLayout;\r
 185                         info.RenderRepeater(writer, this, cStyle, this);\r
 186                         if(tabIndex != 0)\r
 187                         {\r
 188                                 TabIndex = tabIndex;\r
 189                         }\r
 190                         if(dirty)\r
 191                         {\r
 192                                 ViewState.SetItemDirty("TabIndex", false);\r
 193                         }\r
 194                 }\r
 195
 196                 bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)
 197                 {
 198                         string value = postCollection [postDataKey];
 199                         int c = Items.Count;
 200                         for (int i = 0; i < c; i++) {
 201                                 if (Items [i].Value != value)
 202                                         continue;
 203
 204                                 if (i != SelectedIndex) {
 205                                         SelectedIndex = i;
 206                                         selectionIndexChanged = true;
 207                                 }
 208
 209                                 return true;
 210                         }
 211
 212                         return false;
 213                 }
 214
 215                 void IPostBackDataHandler.RaisePostDataChangedEvent()\r
 216                 {\r
 217                         if(selectionIndexChanged)\r
 218                                 OnSelectedIndexChanged(EventArgs.Empty);\r
 219                 }\r
 220 \r
 221                 Style IRepeatInfoUser.GetItemStyle(System.Web.UI.WebControls.ListItemType itemType, int repeatIndex)\r
 222                 {\r
 223                         return null;\r
 224                 }\r
 225 \r
 226                 void IRepeatInfoUser.RenderItem (System.Web.UI.WebControls.ListItemType itemType,\r
 227                                                  int repeatIndex,\r
 228                                                  RepeatInfo repeatInfo,\r
 229                                                  HtmlTextWriter writer)\r
 230                 {\r
 231                         /* Create a new RadioButton as if it was defined in the page and render it */\r
 232                         RadioButton button = new RadioButton ();\r
 233                         button.Page = Page;
 234                         button.GroupName = UniqueID;\r
 235                         button.TextAlign = TextAlign;\r
 236                         button.AutoPostBack = AutoPostBack;\r
 237                         button.ID = ClientID + "_" + repeatIndex.ToString (NumberFormatInfo.InvariantInfo);;\r
 238                         button.TabIndex = tabIndex;
 239                         ListItem current = Items [repeatIndex];\r
 240                         button.Text = current.Text;\r
 241                         button.Attributes ["value"] = current.Value;\r
 242                         button.Checked = current.Selected;\r
 243                         button.Enabled = Enabled;\r
 244                         button.RenderControl (writer);\r
 245                 }\r
 246 \r
 247                 bool IRepeatInfoUser.HasFooter\r
 248                 {\r
 249                         get\r
 250                         {\r
 251                                 return false;\r
 252                         }\r
 253                 }\r
 254 \r
 255                 bool IRepeatInfoUser.HasHeader\r
 256                 {\r
 257                         get\r
 258                         {\r
 259                                 return false;\r
 260                         }\r
 261                 }\r
 262 \r
 263                 bool IRepeatInfoUser.HasSeparators\r
 264                 {\r
 265                         get\r
 266                         {\r
 267                                 return false;\r
 268                         }\r
 269                 }\r
 270 \r
 271                 int IRepeatInfoUser.RepeatedItemCount\r
 272                 {\r
 273                         get\r
 274                         {\r
 275                                 return Items.Count;\r
 276                         }\r
 277                 }\r
 278         }\r
 279 }\r