Source/Design/TabControlDesigner.cs

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using System;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Collections;
using System.Drawing;
using System.ComponentModel.Design;
using System.ComponentModel;

namespace DevComponents.DotNetBar.Design
{
	/// <summary>
	/// Summary description for TabControlDesigner.
	/// </summary>
	public class TabControlDesigner:TabStripDesigner
	{
		public TabControlDesigner()
		{
            this.TabsVisible = true;
		}

        public override void Initialize(IComponent component)
        {
            base.Initialize(component);
            if (!component.Site.DesignMode)
                return;

            TabControl tc = component as TabControl;
            if (this.Inherited)
            {
                if(!tc.TabsVisible)
                    tc.TabsVisible = true;
                if (tc.SelectedPanel != null)
                    tc.SelectedPanel.BringToFront();
            }
        }

		protected override void CreateNewTab(object sender, EventArgs e)
		{
			IDesignerHost dh=(IDesignerHost)GetService(typeof(IDesignerHost));
			TabControl tabControl=this.Control as TabControl;
			if(tabControl==null || dh==null)
				return;

            DesignerTransaction dt = dh.CreateTransaction();
            try
            {
                IComponentChangeService change = this.GetService(typeof(IComponentChangeService)) as IComponentChangeService;
                if (change != null)
                    change.OnComponentChanging(this.Component, null);

                TabItem tab = dh.CreateComponent(typeof(TabItem)) as TabItem;
                tab.Text = tab.Name;

                TabControlPanel panel = dh.CreateComponent(typeof(TabControlPanel)) as TabControlPanel;
                tabControl.ApplyDefaultPanelStyle(panel);
                tab.AttachedControl = panel;
                panel.TabItem = tab;

                tabControl.Tabs.Add(tab);
                tabControl.Controls.Add(panel);