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 #if !NET_2_0\r
  54                 [Bindable (true)]\r
  55 #endif\r
  56                 [DefaultValue (-1), WebCategory ("Layout")]
  57                 [WebSysDescription ("The border left within a RadioButton.")]\r
  58                 public virtual int CellPadding\r
  59                 {\r
  60                         get\r
  61                         {\r
  62                                 if(ControlStyleCreated)\r
  63                                 {\r
  64                                         return (int)(((TableStyle)ControlStyle).CellPadding);\r
  65                                 }\r
  66                                 return -1;\r
  67                         }\r
  68                         set {
  69                                 if (value < -1)
  70                                         throw new ArgumentOutOfRangeException ("value", "CellPadding value has to be -1 for 'not set' or > -1.");\r
  71                                 ((TableStyle)ControlStyle).CellPadding = value;\r
  72                         }\r
  73                 }\r
  74
  75 #if !NET_2_0\r
  76                 [Bindable (true)]\r
  77 #endif\r
  78                 [DefaultValue (-1), WebCategory ("Layout")]
  79                 [WebSysDescription ("The border left between RadioButtons.")]\r
  80                 public virtual int CellSpacing\r
  81                 {\r
  82                         get\r
  83                         {\r
  84                                 if(ControlStyleCreated)\r
  85                                 {\r
  86                                         return (int)(((TableStyle)ControlStyle).CellSpacing);\r
  87                                 }\r
  88                                 return -1;\r
  89                         }\r
  90                         set {
  91                                 if (value < -1)
  92                                         throw new ArgumentOutOfRangeException ("value", "CellSpacing value has to be -1 for 'not set' or > -1.");\r
  93                                 ((TableStyle)ControlStyle).CellSpacing = value;\r
  94                         }\r
  95                 }\r
  96
  97 #if !NET_2_0\r
  98                 [Bindable (true)]\r
  99 #endif\r
 100                 [DefaultValue (0), WebCategory ("Layout")]
 101                 [WebSysDescription ("The number of columns that should be used to display the RadioButtons.")]\r
 102                 public virtual int RepeatColumns\r
 103                 {\r
 104                         get\r
 105                         {\r
 106                                 object o = ViewState["RepeatColumns"];\r
 107                                 if(o != null)\r
 108                                         return (int)o;\r
 109                                 return 0;\r
 110                         }\r
 111                         set {\r
 112                                 if (value < 0)\r
 113                                         throw new ArgumentOutOfRangeException ("value", "RepeatColumns value has to be 0 for 'not set' or > 0.");\r
 114                                 ViewState["RepeatColumns"] = value;\r
 115                         }\r
 116                 }\r
 117
 118 #if !NET_2_0\r
 119                 [Bindable (true)]\r
 120 #endif\r
 121                 [DefaultValue (typeof (RepeatDirection), "Vertical"), WebCategory ("Layout")]
 122                 [WebSysDescription ("The direction that is followed when doing the layout.")]\r
 123                 public virtual RepeatDirection RepeatDirection\r
 124                 {\r
 125                         get\r
 126                         {\r
 127                                 object o = ViewState["RepeatDirection"];\r
 128                                 if(o != null)\r
 129                                         return (RepeatDirection)o;\r
 130                                 return RepeatDirection.Vertical;\r
 131                         }\r
 132                         set\r
 133                         {\r
 134                                 if(!Enum.IsDefined(typeof(RepeatDirection), value))\r
 135                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 136                                 ViewState["RepeatDirection"] = value;\r
 137                         }\r
 138                 }\r
 139
 140 #if !NET_2_0\r
 141                 [Bindable (true)]\r
 142 #endif\r
 143                 [DefaultValue (typeof (RepeatLayout), "Table"), WebCategory ("Layout")]
 144                 [WebSysDescription ("The method used to create the layout.")]\r
 145                 public virtual RepeatLayout RepeatLayout\r
 146                 {\r
 147                         get\r
 148                         {\r
 149                                 object o = ViewState["RepeatLayout"];\r
 150                                 if(o != null)\r
 151                                         return (RepeatLayout)o;\r
 152                                 return RepeatLayout.Table;\r
 153                         }\r
 154                         set\r
 155                         {\r
 156                                 if(!Enum.IsDefined(typeof(RepeatLayout), value))\r
 157                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 158                                 ViewState["RepeatLayout"] = value;\r
 159                         }\r
 160                 }\r
 161
 162 #if !NET_2_0\r
 163                 [Bindable (true)]\r
 164 #endif\r
 165                 [DefaultValue (typeof (TextAlign), "Right"), WebCategory ("Appearance")]
 166                 [WebSysDescription ("The alignment of the RadioButton text.")]\r
 167                 public virtual TextAlign TextAlign\r
 168                 {\r
 169                         get\r
 170                         {\r
 171                                 object o = ViewState["TextAlign"];\r
 172                                 if(o != null)\r
 173                                         return (TextAlign)o;\r
 174                                 return TextAlign.Right;\r
 175                         }\r
 176                         set\r
 177                         {\r
 178                                 if(!Enum.IsDefined(typeof(TextAlign), value))\r
 179                                         throw new ArgumentOutOfRangeException ("value", "Only valid enumeration members are allowed");\r
 180                                 ViewState["TextAlign"] = value;\r
 181                         }\r
 182                 }\r
 183 \r
 184                 protected override Style CreateControlStyle()\r
 185                 {\r
 186                         return new TableStyle(ViewState);\r
 187                 }\r
 188 \r
 189                 protected override void Render(HtmlTextWriter writer)\r
 190                 {\r
 191                         RepeatInfo info = new RepeatInfo();\r
 192                         Style cStyle = (ControlStyleCreated ? ControlStyle : null);\r
 193                         bool dirty = false;\r
 194                         tabIndex = TabIndex;\r
 195                         if(tabIndex != 0)\r
 196                         {\r
 197                                 dirty = !ViewState.IsItemDirty("TabIndex");\r
 198                                 TabIndex = 0;\r
 199                         }\r
 200                         info.RepeatColumns = RepeatColumns;\r
 201                         info.RepeatDirection = RepeatDirection;\r
 202                         info.RepeatLayout = RepeatLayout;\r
 203                         info.RenderRepeater(writer, this, cStyle, this);\r
 204                         if(tabIndex != 0)\r
 205                         {\r
 206                                 TabIndex = tabIndex;\r
 207                         }\r
 208                         if(dirty)\r
 209                         {\r
 210                                 ViewState.SetItemDirty("TabIndex", false);\r
 211                         }\r
 212                 }\r
 213
 214                 bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)
 215                 {
 216                         string value = postCollection [postDataKey];
 217                         int c = Items.Count;
 218                         for (int i = 0; i < c; i++) {
 219                                 if (Items [i].Value != value)
 220                                         continue;
 221
 222                                 if (i != SelectedIndex) {
 223                                         SelectedIndex = i;
 224                                         selectionIndexChanged = true;
 225                                 }
 226
 227                                 return true;
 228                         }
 229
 230                         return false;
 231                 }
 232
 233                 void IPostBackDataHandler.RaisePostDataChangedEvent()\r
 234                 {\r
 235                         if(selectionIndexChanged)\r
 236                                 OnSelectedIndexChanged(EventArgs.Empty);\r
 237                 }\r
 238 \r
 239                 Style IRepeatInfoUser.GetItemStyle(System.Web.UI.WebControls.ListItemType itemType, int repeatIndex)\r
 240                 {\r
 241                         return null;\r
 242                 }\r
 243 \r
 244                 void IRepeatInfoUser.RenderItem (System.Web.UI.WebControls.ListItemType itemType,\r
 245                                                  int repeatIndex,\r
 246                                                  RepeatInfo repeatInfo,\r
 247                                                  HtmlTextWriter writer)\r
 248                 {\r
 249                         /* Create a new RadioButton as if it was defined in the page and render it */\r
 250                         RadioButton button = new RadioButton ();\r
 251                         button.Page = Page;
 252                         button.GroupName = UniqueID;\r
 253                         button.TextAlign = TextAlign;\r
 254                         button.AutoPostBack = AutoPostBack;\r
 255                         button.ID = ClientID + "_" + repeatIndex.ToString (NumberFormatInfo.InvariantInfo);;\r
 256                         button.TabIndex = tabIndex;
 257                         ListItem current = Items [repeatIndex];\r
 258                         button.Text = current.Text;\r
 259                         button.Attributes ["value"] = current.Value;\r
 260                         button.Checked = current.Selected;\r
 261                         button.Enabled = Enabled;\r
 262                         button.RenderControl (writer);\r
 263                 }\r
 264 \r
 265                 bool IRepeatInfoUser.HasFooter\r
 266                 {\r
 267                         get\r
 268                         {\r
 269                                 return false;\r
 270                         }\r
 271                 }\r
 272 \r
 273                 bool IRepeatInfoUser.HasHeader\r
 274                 {\r
 275                         get\r
 276                         {\r
 277                                 return false;\r
 278                         }\r
 279                 }\r
 280 \r
 281                 bool IRepeatInfoUser.HasSeparators\r
 282                 {\r
 283                         get\r
 284                         {\r
 285                                 return false;\r
 286                         }\r
 287                 }\r
 288 \r
 289                 int IRepeatInfoUser.RepeatedItemCount\r
 290                 {\r
 291                         get\r
 292                         {\r
 293                                 return Items.Count;\r
 294                         }\r
 295                 }\r
 296         }\r
 297 }\r