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

   1 //
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   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 #if NET_2_0
  47         [SupportsEventValidation]
  48 #endif
  49         public class HtmlInputImage : HtmlInputControl, IPostBackDataHandler,
  50                       IPostBackEventHandler {
  51
  52                 private static readonly object ServerClickEvent = new object ();
  53
  54                 private int clicked_x;
  55                 private int clicked_y;
  56
  57                 public HtmlInputImage () : base ("image")
  58                 {
  59                 }
  60
  61                 [DefaultValue(true)]
  62                 [WebSysDescription("")]
  63                 [WebCategory("Behavior")]
  64 #if NET_2_0
  65                 public virtual
  66 #else
  67                 public
  68 #endif
  69                 bool CausesValidation {
  70                         get {
  71                                 return ViewState.GetBool ("CausesValidation", true);
  72                         }
  73                         set {
  74                                 ViewState ["CausesValidation"] = value;
  75                         }
  76                 }
  77
  78                 [DefaultValue("")]
  79                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  80                 [WebSysDescription("")]
  81                 [WebCategory("Appearance")]
  82                 public string Align {
  83                         get { return GetAtt ("align"); }
  84                         set { SetAtt ("align", value); }
  85                 }
  86
  87                 [DefaultValue("")]
  88                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  89 #if NET_2_0
  90                 [Localizable (true)]
  91 #endif
  92                 [WebSysDescription("")]
  93                 [WebCategory("Appearance")]
  94                 public string Alt {
  95                         get { return GetAtt ("alt"); }
  96                         set { SetAtt ("alt", value); }
  97                 }
  98
  99                 [DefaultValue("")]
 100                 [WebSysDescription("")]
 101                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 102                 [WebCategory("Appearance")]
 103 #if NET_2_0
 104                 [UrlProperty]
 105 #endif
 106                 public string Src {
 107                         get { return GetAtt ("src"); }
 108                         set { SetAtt ("src", value); }
 109                 }
 110
 111 #if NET_2_0
 112                 [DefaultValue("-1")]
 113 #else
 114                 [DefaultValue("")]
 115 #endif
 116                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 117                 [WebSysDescription("")]
 118                 [WebCategory("Appearance")]
 119                 public int Border {
 120                         get {
 121                                 string border = Attributes ["border"];
 122                                 if (border == null)
 123                                         return -1;
 124                                 return Int32.Parse (border, CultureInfo.InvariantCulture);
 125                         }
 126                         set {
 127                                 if (value == -1) {
 128                                         Attributes.Remove ("border");
 129                                         return;
 130                                 }
 131                                 Attributes ["border"] = value.ToString (CultureInfo.InvariantCulture);
 132                         }
 133                 }
 134
 135                 bool LoadPostDataInternal (string postDataKey, NameValueCollection postCollection)
 136                 {
 137                         string x = postCollection [UniqueID + ".x"];
 138                         string y = postCollection [UniqueID + ".y"];
 139
 140                         if (x != null && x.Length != 0 &&
 141                                         y != null && y.Length != 0) {
 142                                 clicked_x = Int32.Parse (x, CultureInfo.InvariantCulture);
 143                                 clicked_y = Int32.Parse (y, CultureInfo.InvariantCulture);
 144                                 Page.RegisterRequiresRaiseEvent (this);
 145                                 return true;
 146                         }
 147
 148                         return false;
 149                 }
 150
 151
 152                 void RaisePostBackEventInternal (string eventArgument)
 153                 {
 154                         if (CausesValidation)
 155 #if NET_2_0
 156                                 Page.Validate (ValidationGroup);
 157 #else
 158                                 Page.Validate ();
 159 #endif
 160                         OnServerClick (new ImageClickEventArgs (clicked_x, clicked_y));
 161                 }
 162
 163                 void RaisePostDataChangedEventInternal ()
 164                 {
 165                         /* no events to raise */
 166                 }
 167
 168 #if NET_2_0
 169                 [DefaultValue ("")]
 170                 public string ValidationGroup
 171                 {
 172                         get {
 173                                 return ViewState.GetString ("ValidationGroup", "");
 174                         }
 175                         set {
 176                                 ViewState ["ValidationGroup"] = value;
 177                         }
 178                 }
 179
 180                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 181                 {
 182                         return LoadPostDataInternal (postDataKey, postCollection);
 183                 }
 184
 185                 protected virtual void RaisePostBackEvent (string eventArgument)
 186                 {
 187                         RaisePostBackEventInternal (eventArgument);
 188                 }
 189
 190                 protected virtual void RaisePostDataChangedEvent ()
 191                 {
 192                         RaisePostDataChangedEventInternal ();
 193                 }
 194 #endif
 195
 196                 bool IPostBackDataHandler.LoadPostData (string postDataKey,
 197                                 NameValueCollection postCollection)
 198                 {
 199 #if NET_2_0
 200                         return LoadPostData (postDataKey, postCollection);
 201 #else
 202                         return LoadPostDataInternal (postDataKey, postCollection);
 203 #endif
 204                 }
 205
 206
 207                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 208                 {
 209 #if NET_2_0
 210                         RaisePostDataChangedEvent();
 211 #else
 212                         RaisePostDataChangedEventInternal ();
 213 #endif
 214                 }
 215
 216                 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
 217                 {
 218 #if NET_2_0
 219                         RaisePostBackEvent (eventArgument);
 220 #else
 221                         RaisePostBackEventInternal (eventArgument);
 222 #endif
 223                 }
 224
 225 #if NET_2_0
 226                 protected internal
 227 #else
 228                 protected
 229 #endif
 230                 override void OnPreRender (EventArgs e)
 231                 {
 232                         base.OnPreRender (e);
 233
 234                         if (Page != null) {
 235                                 Page.RegisterRequiresPostBack (this);
 236                         }
 237                 }
 238
 239                 protected virtual void OnServerClick (ImageClickEventArgs e)
 240                 {
 241                         EventHandler handler = Events [ServerClickEvent] as EventHandler;
 242                         if (handler != null)
 243                                 handler (this, e);
 244                 }
 245
 246                 protected override void RenderAttributes (HtmlTextWriter writer)
 247                 {
 248                         if (CausesValidation && Page != null && Page.AreValidatorsUplevel ()) {
 249                                 ClientScriptManager csm = new ClientScriptManager (Page);
 250                                 writer.WriteAttribute ("onclick", csm.GetClientValidationEvent ());
 251                         }
 252
 253                         base.RenderAttributes (writer);
 254                 }
 255
 256                 private void SetAtt (string name, string value)
 257                 {
 258                         if (value == null)
 259                                 Attributes.Remove (name);
 260                         else
 261                                 Attributes [name] = value;
 262                 }
 263
 264                 private string GetAtt (string name)
 265                 {
 266                         string res = Attributes [name];
 267                         if (res == null)
 268                                 return String.Empty;
 269                         return res;
 270                 }
 271
 272                 [WebSysDescription("")]
 273                 [WebCategory("Action")]
 274                 public event ImageClickEventHandler ServerClick {
 275                         add { Events.AddHandler (ServerClickEvent, value); }
 276                         remove { Events.AddHandler (ServerClickEvent, value); }
 277                 }
 278         }
 279 }
 280