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//
// ExtenderControl.cs
//
// Author:
// Igor Zelmanovich <igorz@mainsoft.com>
//
// (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
namespace System.Web.UI
{
[DefaultProperty ("TargetControlID")]
[ParseChildren (true)]
[NonVisualControl]
[PersistChildren (false)]
public abstract class ExtenderControl : Control, IExtenderControl
{
ScriptManager _scriptManager;
string _targetControlID;
protected ExtenderControl () { }
[DefaultValue ("")]
[IDReferenceProperty]
[Category ("Behavior")]
public string TargetControlID {
get {
if (_targetControlID == null)
return String.Empty;
return _targetControlID;
}
set { _targetControlID = value; }
}
[Browsable (false)]
[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
[EditorBrowsable (EditorBrowsableState.Never)]
public override bool Visible {
get {
return base.Visible;
}
set {
throw new NotImplementedException ();
}
}
ScriptManager ScriptManager {
get {
if (_scriptManager == null) {
_scriptManager = ScriptManager.GetCurrent (Page);
if (_scriptManager == null)
throw new InvalidOperationException (String.Format ("The control with ID '{0}' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.", ID));
}
return _scriptManager;
}
}
protected abstract IEnumerable<ScriptDescriptor> GetScriptDescriptors (Control targetControl);
protected abstract IEnumerable<ScriptReference> GetScriptReferences ();
protected internal override void OnPreRender (EventArgs e) {
base.OnPreRender (e);
if (String.IsNullOrEmpty (TargetControlID))
throw new InvalidOperationException (String.Format ("The TargetControlID of '{0}' is not valid. The value cannot be null or empty.", ID));
Control c = FindControl (TargetControlID);
if (c == null)
throw new InvalidOperationException (String.Format ("The TargetControlID of '{0}' is not valid. A control with ID '{1}' could not be found.", ID, TargetControlID));
ScriptManager.RegisterExtenderControl (this, c);
}
protected internal override void Render (HtmlTextWriter writer) {
ScriptManager.RegisterScriptDescriptors (this);
base.Render (writer);
}
#region IExtenderControl Members
IEnumerable<ScriptDescriptor> IExtenderControl.GetScriptDescriptors (Control targetControl) {
return GetScriptDescriptors (targetControl);
}
IEnumerable<ScriptReference> IExtenderControl.GetScriptReferences () {
return GetScriptReferences ();
}
#endregion
}
}
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