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

   1 /**\r
   2  * Namespace: System.Web.UI.WebControls\r
   3  * Class:     CheckBox\r
   4  * \r
   5  * Author:  Gaurav Vaish\r
   6  * Maintainer: gvaish@iitk.ac.in\r
   7  * Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>\r
   8  * Status:  60%\r
   9  * \r
  10  * (C) Gaurav Vaish (2001)\r
  11  */\r
  12 \r
  13 using System;\r
  14 using System.Collections;\r
  15 using System.Collections.Specialized;\r
  16 using System.Web;\r
  17 using System.Web.UI;\r
  18 \r
  19 namespace System.Web.UI.WebControls\r
  20 {\r
  21         public class CheckBox : WebControl, IPostBackDataHandler\r
  22         {\r
  23                 private static readonly object CheckedChangedEvent = new object();\r
  24 \r
  25                 public CheckBox()\r
  26                 {\r
  27                         //\r
  28                 }\r
  29                 \r
  30                 public virtual bool AutoPostBack\r
  31                 {\r
  32                         get\r
  33                         {\r
  34                                 object o = ViewState["AutoPostBack"];\r
  35                                 if(o!=null)\r
  36                                         return (bool)AutoPostBack;\r
  37                                 return false;\r
  38                         }\r
  39                         set\r
  40                         {\r
  41                                 ViewState["AutoPostBack"] = value;\r
  42                         }\r
  43                 }\r
  44                 \r
  45                 public virtual bool Checked\r
  46                 {\r
  47                         get\r
  48                         {\r
  49                                 object o = ViewState["Checked"];\r
  50                                 if(o!=null)\r
  51                                         return (bool)o;\r
  52                                 return false;\r
  53                         }\r
  54                         set\r
  55                         {\r
  56                                 ViewState["Checked"] = value;\r
  57                         }\r
  58                 }\r
  59 \r
  60                 public virtual string Text\r
  61                 {\r
  62                         get\r
  63                         {\r
  64                                 object o = ViewState["Text"];\r
  65                                 if(o!=null)\r
  66                                         return (string)o;\r
  67                                 return String.Empty;\r
  68                         }\r
  69                         set\r
  70                         {\r
  71                                 ViewState["Text"] = value;\r
  72                         }\r
  73                 }\r
  74                 \r
  75                 public virtual TextAlign TextAlign\r
  76                 {\r
  77                         get\r
  78                         {\r
  79                                 object o = ViewState["TextAlign"];\r
  80                                 if(o!=null)\r
  81                                         return (TextAlign)o;\r
  82                                 return TextAlign.Right;\r
  83                         }\r
  84                         set\r
  85                         {\r
  86                                 if(!System.Enum.IsDefined(typeof(TextAlign), value))\r
  87                                         throw new ArgumentException();\r
  88                                 ViewState["TextAlign"] = value;\r
  89                         }\r
  90                 }\r
  91                 \r
  92                 public event EventHandler CheckedChanged\r
  93                 {\r
  94                         add\r
  95                         {\r
  96                                 Events.AddHandler(CheckedChangedEvent, value);\r
  97                         }\r
  98                         remove\r
  99                         {\r
 100                                 Events.RemoveHandler(CheckedChangedEvent, value);\r
 101                         }\r
 102                 }\r
 103                 \r
 104                 protected virtual void OnCheckedChanged(EventArgs e)\r
 105                 {\r
 106                         if(Events!=null)\r
 107                         {\r
 108                                 EventHandler eh = (EventHandler)(Events[CheckedChangedEvent]);\r
 109                                 if(eh!=null)\r
 110                                         eh(this, e);\r
 111                         }\r
 112                 }\r
 113                 \r
 114                 protected override void Render(HtmlTextWriter writer)\r
 115                 {\r
 116                         //TODO: THE LOST WORLD!\r
 117                         // I know I have to do it.\r
 118                 }\r
 119                 \r
 120                 public bool LoadPostData(string postDataKey, NameValueCollection postCollection)\r
 121                 {\r
 122                         //TODO: THE LOST WORLD\r
 123                         // Now what the hell is this!\r
 124                         return false;\r
 125                 }\r
 126                 \r
 127                 public void RaisePostDataChangedEvent()\r
 128                 {\r
 129                         //TODO: THE LOST WORLD...\r
 130                         // Raise the bucket out of the well :))\r
 131                         OnCheckedChanged(EventArgs.Empty);\r
 132                 }\r
 133         }\r
 134 }\r