ModbusTool/CommonControls/TabControlEx.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Modbus.Common.Properties;

namespace Modbus.Common
{
    public delegate bool PreRemoveTab(int indx);
    public class TabControlEx : TabControl
    {
        public TabControlEx()
            : base()
        {
            PreRemoveTabPage = null;
            this.DrawMode = TabDrawMode.OwnerDrawFixed;
        }

        public PreRemoveTab PreRemoveTabPage;

        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            var r = GetTabRect(e.Index);
            r.Offset(2, 2);
            r.Width = 10;
            r.Height = 10;
            e.Graphics.DrawIcon(Resources.close, r);
            e.Graphics.DrawString(TabPages[e.Index].Text, e.Font, Brushes.Black, new PointF(r.X + 10, r.Y));
            e.DrawFocusRectangle();
        }
        protected override void OnMouseClick(MouseEventArgs e)
        {
            Point p = e.Location;
            for (int i = 0; i < TabCount; i++)
            {
                Rectangle r = GetTabRect(i);
                r.Width = 10;
                if (r.Contains(p))
                {
                    CloseTab(i);
                }
            }
        }

        private void CloseTab(int i)
        {
            if (PreRemoveTabPage != null)
            {
                bool closeIt = PreRemoveTabPage(i);
                if (!closeIt)
                    return;
            }
            TabPages.Remove(TabPages[i]);
        }
    }
}