mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlInputImage.cs

   1 //
   2 // Permission is hereby granted, free of charge, to any person obtaining
   3 // a copy of this software and associated documentation files (the
   4 // "Software"), to deal in the Software without restriction, including
   5 // without limitation the rights to use, copy, modify, merge, publish,
   6 // distribute, sublicense, and/or sell copies of the Software, and to
   7 // permit persons to whom the Software is furnished to do so, subject to
   8 // the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be
  11 // included in all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  15 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  17 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  18 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  19 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20 //
  21 //
  22 // System.Web.UI.HtmlControls.HtmlInputImage.cs
  23 //
  24 // Authors:
  25 //      Jackson Harper (jackson@ximian.com)
  26 //
  27 // (C) 2005 Novell, Inc.
  28
  29
  30 //
  31 // TODO: getting the .x and .y in LoadData doesn't work with mozilla
  32 //
  33
  34 using System.Globalization;
  35 using System.Collections.Specialized;
  36 using System.ComponentModel;
  37 using System.Security.Permissions;
  38
  39 namespace System.Web.UI.HtmlControls {
  40
  41         // CAS
  42         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  43         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  44         // attributes
  45         [DefaultEvent("ServerClick")]
  46         public class HtmlInputImage : HtmlInputControl, IPostBackDataHandler,
  47                       IPostBackEventHandler {
  48
  49                 private static readonly object ServerClickEvent = new object ();
  50
  51                 private int clicked_x;
  52                 private int clicked_y;
  53
  54                 public HtmlInputImage () : base ("image")
  55                 {
  56                 }
  57
  58                 [DefaultValue(true)]
  59                 [WebSysDescription("")]
  60                 [WebCategory("Behavior")]
  61 #if NET_2_0
  62                 public virtual
  63 #else
  64                 public
  65 #endif
  66                 bool CausesValidation {
  67                         get {
  68                                 return ViewState.GetBool ("CausesValidation", true);
  69                         }
  70                         set {
  71                                 ViewState ["CausesValidation"] = value;
  72                         }
  73                 }
  74
  75                 [DefaultValue("")]
  76                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  77                 [WebSysDescription("")]
  78                 [WebCategory("Appearance")]
  79                 public string Align {
  80                         get { return GetAtt ("align"); }
  81                         set { SetAtt ("align", value); }
  82                 }
  83
  84                 [DefaultValue("")]
  85                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  86 #if NET_2_0
  87                 [Localizable (true)]
  88 #endif
  89                 [WebSysDescription("")]
  90                 [WebCategory("Appearance")]
  91                 public string Alt {
  92                         get { return GetAtt ("alt"); }
  93                         set { SetAtt ("alt", value); }
  94                 }
  95
  96                 [DefaultValue("")]
  97                 [WebSysDescription("")]
  98                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  99                 [WebCategory("Appearance")]
 100                 public string Src {
 101                         get { return GetAtt ("src"); }
 102                         set { SetAtt ("src", value); }
 103                 }
 104
 105 #if NET_2_0
 106                 [DefaultValue("-1")]
 107 #else
 108                 [DefaultValue("")]
 109 #endif
 110                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 111                 [WebSysDescription("")]
 112                 [WebCategory("Appearance")]
 113                 public int Border {
 114                         get {
 115                                 string border = Attributes ["border"];
 116                                 if (border == null)
 117                                         return -1;
 118                                 return Int32.Parse (border, CultureInfo.InvariantCulture);
 119                         }
 120                         set {
 121                                 if (value == -1) {
 122                                         Attributes.Remove ("border");
 123                                         return;
 124                                 }
 125                                 Attributes ["border"] = value.ToString (CultureInfo.InvariantCulture);
 126                         }
 127                 }
 128
 129                 bool LoadPostDataInternal (string postDataKey, NameValueCollection postCollection)
 130                 {
 131                         string x = postCollection [UniqueID + ".x"];
 132                         string y = postCollection [UniqueID + ".y"];
 133
 134                         if (x != null && x.Length != 0 &&
 135                                         y != null && y.Length != 0) {
 136                                 clicked_x = Int32.Parse (x, CultureInfo.InvariantCulture);
 137                                 clicked_y = Int32.Parse (y, CultureInfo.InvariantCulture);
 138                                 Page.RegisterRequiresRaiseEvent (this);
 139                                 return true;
 140                         }
 141
 142                         return false;
 143                 }
 144
 145
 146                 void RaisePostBackEventInternal (string eventArgument)
 147                 {
 148                         if (CausesValidation)
 149 #if NET_2_0
 150                                 Page.Validate (ValidationGroup);
 151 #else
 152                                 Page.Validate ();
 153 #endif
 154                         OnServerClick (new ImageClickEventArgs (clicked_x, clicked_y));
 155                 }
 156
 157                 void RaisePostDataChangedEventInternal ()
 158                 {
 159                         /* no events to raise */
 160                 }
 161
 162 #if NET_2_0
 163                 [DefaultValue ("")]
 164                 public string ValidationGroup
 165                 {
 166                         get {
 167                                 return ViewState.GetString ("ValidationGroup", "");
 168                         }
 169                         set {
 170                                 ViewState ["ValidationGroup"] = value;
 171                         }
 172                 }
 173
 174                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 175                 {
 176                         return LoadPostDataInternal (postDataKey, postCollection);
 177                 }
 178
 179                 protected virtual void RaisePostBackEvent (string eventArgument)
 180                 {
 181                         RaisePostBackEventInternal (eventArgument);
 182                 }
 183
 184                 protected virtual void RaisePostDataChangedEvent ()
 185                 {
 186                         RaisePostDataChangedEventInternal ();
 187                 }
 188 #endif
 189
 190                 bool IPostBackDataHandler.LoadPostData (string postDataKey,
 191                                 NameValueCollection postCollection)
 192                 {
 193 #if NET_2_0
 194                         return LoadPostData (postDataKey, postCollection);
 195 #else
 196                         return LoadPostDataInternal (postDataKey, postCollection);
 197 #endif
 198                 }
 199
 200
 201                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 202                 {
 203 #if NET_2_0
 204                         RaisePostDataChangedEvent();
 205 #else
 206                         RaisePostDataChangedEventInternal ();
 207 #endif
 208                 }
 209
 210                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
 211                 {
 212 #if NET_2_0
 213                         RaisePostBackEvent (eventArgument);
 214 #else
 215                         RaisePostBackEventInternal (eventArgument);
 216 #endif
 217                 }
 218
 219 #if NET_2_0
 220                 protected internal
 221 #else
 222                 protected
 223 #endif
 224                 override void OnPreRender (EventArgs e)
 225                 {
 226                         base.OnPreRender (e);
 227
 228                         if (Page != null) {
 229                                 Page.RegisterRequiresPostBack (this);
 230                         }
 231                 }
 232
 233                 protected virtual void OnServerClick (ImageClickEventArgs e)
 234                 {
 235                         EventHandler handler = Events [ServerClickEvent] as EventHandler;
 236                         if (handler != null)
 237                                 handler (this, e);
 238                 }
 239
 240                 protected override void RenderAttributes (HtmlTextWriter writer)
 241                 {
 242                         if (CausesValidation && Page != null && Page.AreValidatorsUplevel ()) {
 243                                 ClientScriptManager csm = new ClientScriptManager (Page);
 244                                 writer.WriteAttribute ("onclick", csm.GetClientValidationEvent ());
 245                         }
 246
 247                         base.RenderAttributes (writer);
 248                 }
 249
 250                 private void SetAtt (string name, string value)
 251                 {
 252                         if (value == null)
 253                                 Attributes.Remove (name);
 254                         else
 255                                 Attributes [name] = value;
 256                 }
 257
 258                 private string GetAtt (string name)
 259                 {
 260                         string res = Attributes [name];
 261                         if (res == null)
 262                                 return String.Empty;
 263                         return res;
 264                 }
 265
 266                 [WebSysDescription("")]
 267                 [WebCategory("Action")]
 268                 public event ImageClickEventHandler ServerClick {
 269                         add { Events.AddHandler (ServerClickEvent, value); }
 270                         remove { Events.AddHandler (ServerClickEvent, value); }
 271                 }
 272         }
 273 }
 274