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

   1 //\r
   2 // System.Web.UI.WebControls.MultiView.cs\r
   3 //\r
   4 // Authors:\r
   5 //      Lluis Sanchez Gual (lluis@novell.com)\r
   6 //\r
   7 // (C) 2004 Novell, Inc (http://www.novell.com)\r
   8 //\r
   9 // Permission is hereby granted, free of charge, to any person obtaining\r
  10 // a copy of this software and associated documentation files (the\r
  11 // "Software"), to deal in the Software without restriction, including\r
  12 // without limitation the rights to use, copy, modify, merge, publish,\r
  13 // distribute, sublicense, and/or sell copies of the Software, and to\r
  14 // permit persons to whom the Software is furnished to do so, subject to\r
  15 // the following conditions:\r
  16 // \r
  17 // The above copyright notice and this permission notice shall be\r
  18 // included in all copies or substantial portions of the Software.\r
  19 // \r
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  27 //\r
  28 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)\r
  29 //\r
  30 \r
  31 #if NET_2_0\r
  32 \r
  33 using System;\r
  34 using System.Globalization;\r
  35 using System.Web;\r
  36 using System.Web.UI;\r
  37 using System.ComponentModel;\r
  38 \r
  39 namespace System.Web.UI.WebControls\r
  40 {\r
  41 //      [ControlBuilder (typeof(MultiViewControlBuilder)]\r
  42         [Designer ("System.Web.UI.Design.WebControls.MultiViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]\r
  43         [ToolboxData ("<{0}:MultiView runat=\"server\"></{0}:MultiView>")]\r
  44         [ParseChildren (false, ChildControlType = typeof(View))]\r
  45         [DefaultEvent ("ActiveViewChanged")]\r
  46         public class MultiView: Control\r
  47         {\r
  48                 public static readonly string NextViewCommandName = "NextView";\r
  49                 public static readonly string PreviousViewCommandName = "PrevView";\r
  50                 public static readonly string SwitchViewByIDCommandName = "SwitchViewByID";\r
  51                 public static readonly string SwitchViewByIndexCommandName = "SwitchViewByIndex";\r
  52                 \r
  53                 private static readonly object ActiveViewChangedEvent = new object();\r
  54                 \r
  55                 int viewIndex = -1;\r
  56                 int initialIndex = -1;\r
  57                 bool initied;\r
  58                 \r
  59                 public event EventHandler ActiveViewChanged {\r
  60                         add { Events.AddHandler (ActiveViewChangedEvent, value); }\r
  61                         remove { Events.RemoveHandler (ActiveViewChangedEvent, value); }\r
  62                 }\r
  63                 \r
  64                 protected override void AddParsedSubObject (object ob)\r
  65                 {\r
  66                         if (ob is View)\r
  67                                 Controls.Add (ob as View);\r
  68                 }\r
  69                 \r
  70                 protected override ControlCollection CreateControlCollection ()\r
  71                 {\r
  72                         return new ViewCollection (this);\r
  73                 }\r
  74                 \r
  75                 public View GetActiveView ()\r
  76                 {\r
  77                         if (viewIndex < 0 || viewIndex >= Controls.Count)\r
  78                                 throw new HttpException ("The ActiveViewIndex is not set to a valid View control");\r
  79                         return Controls [viewIndex] as View;\r
  80                 }\r
  81                 \r
  82                 public void SetActiveView (View view)\r
  83                 {\r
  84                         int i = Controls.IndexOf (view);\r
  85                         if (i == -1)\r
  86                                 throw new HttpException ("The provided view is not contained in the MultiView control.");\r
  87                                 \r
  88                         ActiveViewIndex = i;\r
  89                 }\r
  90                 \r
  91                 [DefaultValue (-1)]\r
  92                 public virtual int ActiveViewIndex {\r
  93                         get { return viewIndex; }\r
  94                         set {\r
  95                                 if (!initied) {\r
  96                                         initialIndex = value;\r
  97                                         return;\r
  98                                 }\r
  99                                 \r
 100                                 if (value < -1 || value >= Controls.Count)\r
 101                                         throw new ArgumentOutOfRangeException ();\r
 102 \r
 103                                 if (viewIndex != -1)\r
 104                                         ((View)Controls [viewIndex]).NotifyActivation (false);\r
 105 \r
 106                                 viewIndex = value;\r
 107 \r
 108                                 if (viewIndex != -1)\r
 109                                         ((View)Controls [viewIndex]).NotifyActivation (true);\r
 110 \r
 111                                 UpdateViewVisibility ();\r
 112                         }\r
 113                 }\r
 114 \r
 115                 [Browsable (true)]\r
 116                 [MonoTODO]\r
 117                 public virtual new bool EnableTheming\r
 118                 {\r
 119                         get {\r
 120                                 throw new NotImplementedException ();\r
 121                         }\r
 122                         set {\r
 123                                 throw new NotImplementedException ();\r
 124                         }\r
 125                 }\r
 126                 \r
 127                 [PersistenceMode (PersistenceMode.InnerDefaultProperty)]\r
 128                 [Browsable (false)]\r
 129                 public virtual ViewCollection Views {\r
 130                         get { return Controls as ViewCollection; }\r
 131                 }\r
 132                 \r
 133                 protected override bool OnBubbleEvent (object source, EventArgs e)\r
 134                 {\r
 135                         CommandEventArgs ca = e as CommandEventArgs;\r
 136                         if (ca != null) {\r
 137                                 switch (ca.CommandName) {\r
 138                                         case "NextView":\r
 139                                                 if (viewIndex < Controls.Count - 1 && Controls.Count > 0)\r
 140                                                         ActiveViewIndex = viewIndex + 1;\r
 141                                                 break;\r
 142                                                 \r
 143                                         case "PrevView": \r
 144                                                 if (viewIndex > 0)\r
 145                                                         ActiveViewIndex = viewIndex - 1;\r
 146                                                 break;\r
 147                                                 \r
 148                                         case "SwitchViewByID":\r
 149                                                 foreach (View v in Controls)\r
 150                                                         if (v.ID == ca.CommandArgument) {\r
 151                                                                 SetActiveView (v);\r
 152                                                                 break;\r
 153                                                         }\r
 154                                                 break;\r
 155                                                 \r
 156                                         case "SwitchViewByIndex":\r
 157                                                 int i = (int) Convert.ChangeType (ca.CommandArgument, typeof(int));\r
 158                                                 ActiveViewIndex = i;\r
 159                                                 break;\r
 160                                 }\r
 161                         }\r
 162                         return false;\r
 163                 }\r
 164                 \r
 165                 protected internal override void OnInit (EventArgs e)\r
 166                 {\r
 167                         initied = true;\r
 168                         Page.RegisterRequiresControlState (this);\r
 169                         if (initialIndex != -1) {\r
 170                                 ActiveViewIndex = initialIndex;\r
 171                                 initialIndex = -1;\r
 172                         }\r
 173                         base.OnInit (e);\r
 174                 }\r
 175                 \r
 176                 void UpdateViewVisibility ()\r
 177                 {\r
 178                         for (int n=0; n<Views.Count; n++)\r
 179                                 Views [n].Visible = (n == viewIndex);\r
 180                 }\r
 181                 \r
 182                 protected internal override void RemovedControl (Control ctl)\r
 183                 {\r
 184                         if (viewIndex >= Controls.Count) {\r
 185                                 viewIndex = Controls.Count - 1;\r
 186                                 UpdateViewVisibility ();\r
 187                         }\r
 188 \r
 189                         base.RemovedControl (ctl);\r
 190                 }\r
 191                 \r
 192                 protected internal override void LoadControlState (object state)\r
 193                 {\r
 194                         if (state != null) {\r
 195                                 viewIndex = (int)state;\r
 196                                 UpdateViewVisibility ();\r
 197                         }\r
 198                         else viewIndex = -1;\r
 199                 }\r
 200                 \r
 201                 protected internal override object SaveControlState ()\r
 202                 {\r
 203                         if (viewIndex != -1) return viewIndex;\r
 204                         else return null;\r
 205                 }\r
 206                 \r
 207                 protected virtual void OnActiveViewChanged (EventArgs e)\r
 208                 {\r
 209                         if (Events != null) {\r
 210                                 EventHandler eh = (EventHandler) Events [ActiveViewChangedEvent];\r
 211                                 if (eh != null) eh (this, e);\r
 212                         }\r
 213                 }\r
 214                 \r
 215                 protected internal override void Render (HtmlTextWriter writer)\r
 216                 {\r
 217                         if (!initied) viewIndex = initialIndex;\r
 218                         if (viewIndex != -1)\r
 219                                 GetActiveView ().Render (writer);\r
 220                 }\r
 221         }\r
 222 }\r
 223 \r
 224 #endif\r