Hi Nicola,

Regretfully, we do not yet have much documentation for design time customizations, but what we have is summarized and put into very simple samples here. From this paragraphs you will learn that Visual WebGui uses Controllers for design time controlling.

I'm not sure if it covers your needs here, but in order to override this property and use design time customization, the basics would be something like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel;

using Gizmox.WebGUI.Forms;
using Gizmox.WebGUI.Forms.Design;
using Gizmox.WebGUI.Common.Extensibility;
using Gizmox.WebGUI.Client;
using Gizmox.WebGUI.Common.Interfaces;

namespace App20120607cVS2010
{
    [DesignTimeController("App20120607cVS2010.MyCustomController, App20120607cVS2010")]
    [ClientController("App20120607cVS2010.MyCustomController, App20120607cVS2010")]
    public class CustomTabControl : TabControl 
    {

        public new TabPageCollection TabPages { get { return base.TabPages; } }
  
    }

    public class MyCustomController : Gizmox.WebGUI.Client.Controllers.TabControlController  
    {
        		/// <summary>
		///
		/// </summary>
		/// <param name="objWebTreeView"></param>
		/// <param name="objWinTreeView"></param>
		public MyCustomController(IContext objContext,object objWebObject,object objWinObject) :base(objContext,objWebObject,objWinObject)
		{
		}
		
		/// <summary>
		///
		/// </summary>
		/// <param name="objWebTreeView"></param>
		/// <param name="objWinTreeView"></param>
        public MyCustomController(IContext objContext, object objWebObject)
            : base(objContext, objWebObject)
		{
		}
    }
}

You can find most of the design-time controllers available in the Gizmox.WebGUI.Client project, which is a part of our public source code.

Hope this helps a bit.

Palli

 Hi Nicola,

Thanks for the sample. 

After studying this quite a bit, my conclution is that the WinForms TabControl, which is used by the Visual WebGui designer, is the one adding those TabPages to your custom TabControl and the Visual WebGui design time simply adds a copy to sync it with the WinForms control. I am waiting on more info from our developers, as there may be a solution to this, but the problem is that it is within our private code and I can't publish it without permission.

In addition, I think that you may need to change the TabPage collection a bit and have your CustomTabPageCollection inherit from TabPageCollection, as well as have the CustomTabControl.TabPages property use the base.TabPages, but I will have to explore this a bit further when I get a response from our developers. 

I will update you on this thread as soon as I have more information.

Palli