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/* System.Web.UI.HtmlControls
* Authors
* Leen Toelen (toelen@hotmail.com)
*/
using System;
using System.Web;
using System.Web.UI;
using System.Globalization;
using System.Collections.Specialized;
namespace System.Web.UI.HtmlControls{
public class HtmlInputImage : HtmlInputControl, IPostBackEventHandler, IPostBackDataHandler{
private static readonly object EventServerClick;
private int _x, _y;
public HtmlInputImage(): base("image"){}
protected override void OnPreRender(EventArgs e){
if (Page != null && !Disabled){
Page.RegisterRequiresPostBack(this);
}
}
protected void OnServerClick(ImageClickEventArgs e){
ImageClickEventHandler handler = (ImageClickEventHandler) Events[EventServerClick];
// if (handler != null) handler.Invoke(this, e);
}
public bool LoadPostData(string postDataKey, NameValueCollection postCollection){
string postX = postCollection[String.Concat(RenderedName,".x")];
string postY = postCollection[String.Concat(RenderedName,".y")];
if (postX != null && postY != null && postX.Length >= 0 && postY.Length >= 0){
_x = Int32.Parse(postX, CultureInfo.InvariantCulture);
_y = Int32.Parse(postY, CultureInfo.InvariantCulture);
Page.RegisterRequiresRaiseEvent(this);
}
return false;
}
public void RaisePostBackEvent(string eventArgument){
if (CausesValidation){
Page.Validate();
}
OnServerClick(new ImageClickEventArgs(_x,_y));
}
public void RaisePostDataChangedEvent(){}
public event EventHandler ServerClick{
add{
Events.AddHandler(EventServerClick, value);
}
remove{
Events.RemoveHandler(EventServerClick, value);
}
}
public string Align{
get{
string attr = Attributes["align"];
if (attr != null) return attr;
return String.Empty;
}
set{
Attributes["align"] = AttributeToString(value);
}
}
public string Alt{
get{
string attr = Attributes["alt"];
if (attr != null) return attr;
return String.Empty;
}
set{
Attributes["alt"] = AttributeToString(value);
}
}
public int Border{
get{
string attr = Attributes["border"];
if (attr != null) return Int32.Parse(attr,CultureInfo.InvariantCulture);
return -1;
}
set{
Attributes["border"] = AttributeToString(value);
}
}
public bool CausesValidation{
get{
object causesVal = ViewState["CausesValidation"];
if (causesVal != null) return (Boolean) causesVal;
return true;
}
set{
ViewState["CausesValidation"] = (Boolean) value;
}
}
public string Src{
get{
string attr = Attributes["src"];
if (attr != null) return attr;
return String.Empty;
}
set{
Attributes["src"] = AttributeToString(value);
}
}
} // class HtmlInputImage
} // namespace System.Web.UI.HtmlControls
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