TabStripRenderer

Question

    public class SelectedTabChangedEventArgs : EventArgs
    {
        public readonly TabStripButton SelectedTab;        public SelectedTabChangedEventArgs(TabStripButton tab)
        {
            SelectedTab = tab;
        }    }    /// <summary>
    /// Represents a TabStrip control
    /// </summary>
    public class TabStrip : ToolStrip
    {
        private TabStripRenderer myRenderer = new TabStripRenderer();
        protected TabStripButton mySelTab;
        DesignerVerb insPage = null;        public TabStrip() : base() 
        { 
            InitControl();
        }        public TabStrip(params TabStripButton[] buttons) : base(buttons) 
        { 
            InitControl();
        }        protected void InitControl()
        {
            base.RenderMode = ToolStripRenderMode.ManagerRenderMode;
            base.Renderer = myRenderer;
            myRenderer.RenderMode = this.RenderStyle;
            insPage = new DesignerVerb("Insert tab page", new EventHandler(OnInsertPageClicked));
        }        public override ISite Site
        {
            get
            {
                ISite site = base.Site;
                if (site != null && site.DesignMode)
                {
                    IContainer comp = site.Container;
                    if (comp != null)
                    {
                        IDesignerHost host = comp as IDesignerHost;
                        if (host != null)
                        {
                            IDesigner designer = host.GetDesigner(site.Component);
                            if (designer != null && !designer.Verbs.Contains(insPage))
                                designer.Verbs.Add(insPage);
                        }
                    }
                }
                return site;
            }
            set
            {
                base.Site = value;
            }
        }        protected void OnInsertPageClicked(object sender, EventArgs e)
        {
            ISite site = base.Site;
            if (site != null && site.DesignMode)
            {
                IContainer container = site.Container;
                if (container != null)
                {
                    TabStripButton btn = new TabStripButton();
                    container.Add(btn);
                    btn.Text = btn.Name;
                }
            }
        }        /// <summary>
        /// Gets custom renderer for TabStrip. Set operation has no effect
        /// </summary>
        public new ToolStripRenderer Renderer
        {
            get { return myRenderer; }
            set { base.Renderer = myRenderer; }
        }        /// <summary>
        /// Gets or sets layout style for TabStrip control
        /// </summary>
        public new ToolStripLayoutStyle LayoutStyle
        {
            get { return base.LayoutStyle; }
            set 
            {
                switch (value)
                {
                    case ToolStripLayoutStyle.StackWithOverflow:
                    case ToolStripLayoutStyle.HorizontalStackWithOverflow:
                    case ToolStripLayoutStyle.VerticalStackWithOverflow:
                        base.LayoutStyle = ToolStripLayoutStyle.StackWithOverflow;
                        break;
                    case ToolStripLayoutStyle.Table:
                        base.LayoutStyle = ToolStripLayoutStyle.Table;
                        break;
                    case ToolStripLayoutStyle.Flow:
                        base.LayoutStyle = ToolStripLayoutStyle.Flow;
                        break;
                    default:
                        base.LayoutStyle = ToolStripLayoutStyle.StackWithOverflow;
                        break;
                }
            }
        }        /// <summary>
        /// 
        /// </summary>
        [Obsolete("Use RenderStyle instead")]
        [Browsable(false)]
        public new ToolStripRenderMode RenderMode
        {
            get { return base.RenderMode; }
            set { RenderStyle = value; }
        }        /// <summary>
        /// Gets or sets render style for TabStrip, use it instead of 
        /// </summary>
        [Category("Appearance")]
        [Description("Gets or sets render style for TabStrip. You should use this property instead of RenderMode.")]
        public ToolStripRenderMode RenderStyle
        {
            get { return myRenderer.RenderMode; }
            set 
            {
                myRenderer.RenderMode = value;
                this.Invalidate();
            }
        }        protected override Padding DefaultPadding
        {
            get
            {
                return Padding.Empty;
            }
        }        [Browsable(false)]
        public new Padding Padding
        {
            get { return DefaultPadding; }
            set { }
        }        /// <summary>
        /// Gets or sets if control should use system visual styles for painting items
        /// </summary>
        [Category("Appearance")]
        [Description("Specifies if TabStrip should use system visual styles for painting items")]
        public bool UseVisualStyles
        {
            get { return myRenderer.UseVS; }
            set 
            {
                myRenderer.UseVS = value;
                this.Invalidate();
            }
        }        /// <summary>
        /// Gets or sets if TabButtons should be drawn flipped
        /// </summary>
        [Category("Appearance")]
        [Description("Specifies if TabButtons should be drawn flipped (for right- and bottom-aligned TabStrips)")]
        public bool FlipButtons
        {
            get { return myRenderer.Mirrored; }
            set 
            { 
                myRenderer.Mirrored = value;
                this.Invalidate();
            }
        }        /// <summary>
        /// Gets or sets currently selected tab
        /// </summary>
        public TabStripButton SelectedTab
        {
            get { return mySelTab; }
            set
            {
                if (value == null)
                    return;
                if (mySelTab == value)
                    return;
                if (value.Owner != this)
                    throw new ArgumentException("Cannot select TabButtons that do not belong to this TabStrip");
                OnItemClicked(new ToolStripItemClickedEventArgs(value));
            }
        }        public event EventHandler<SelectedTabChangedEventArgs> SelectedTabChanged;        protected void OnTabSelected(TabStripButton tab)
        {
            this.Invalidate();
            if (SelectedTabChanged != null)
                SelectedTabChanged(this, new SelectedTabChangedEventArgs(tab));
        }        protected override void OnItemAdded(ToolStripItemEventArgs e)
        {
            base.OnItemAdded(e);
            if (e.Item is TabStripButton)
                SelectedTab = (TabStripButton)e.Item;
        }        protected override void OnItemClicked(ToolStripItemClickedEventArgs e)
        {
            TabStripButton clickedBtn = e.ClickedItem as TabStripButton;
            if (clickedBtn != null)
            {
                this.SuspendLayout();
                mySelTab = clickedBtn;
                this.ResumeLayout();
                OnTabSelected(clickedBtn);
            }
            base.OnItemClicked(e);
        }    }