Mini Kabibi Habibi

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using DevExpress.Utils;
using DevExpress.LookAndFeel;

namespace DevExpress.XtraLayout.Demos {
    public partial class Browser : DevExpress.XtraLayout.Demos.TutorialControl {
        bool needDecreaseSelectedPageIndex = false;
        string defaultUrl = "";
        string dxUrl = "http://www.devexpress.com/";
        public Browser() {
            InitializeComponent();
            DisabledVerticalStyle();
        }
        protected override void OnStyleChanged() {
            base.OnStyleChanged();
            DisabledVerticalStyle();
        }
        void DisabledVerticalStyle() {
            checkEdit2.Enabled = UserLookAndFeel.Default.ActiveStyle != ActiveLookAndFeelStyle.Flat 
                && UserLookAndFeel.Default.ActiveStyle != ActiveLookAndFeelStyle.Office2003
                && UserLookAndFeel.Default.ActiveStyle != ActiveLookAndFeelStyle.UltraFlat;
        }
        protected void SetUrlInSelectedTabPage(string url) {
            if (url == "" || url == null) ((WebBrowser)((LayoutControlItem)tabbedControlGroup1.SelectedTabPage[0]).Control).GoHome();
            else ((WebBrowser)((LayoutControlItem)tabbedControlGroup1.SelectedTabPage[0]).Control).Url = new Uri(url);
        }
        protected void UpdateUrl() {
            bool wasError = false;
            try {
                SetUrlInSelectedTabPage((string)urlEdit.EditValue);
            } catch {
                try {
                    SetUrlInSelectedTabPage("http://" + (string)urlEdit.EditValue);
                } catch {
                    wasError = true;
                }
            }
            if (!wasError) {
                tabbedControlGroup1.SelectedTabPage.Text = (string)urlEdit.EditValue;
            }
        }
        private void urlEdit_ButtonClick(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e) {
            UpdateUrl();
        }
        private void layoutControl1_TabPageCloseButtonClick(object sender, DevExpress.XtraLayout.Utils.LayoutGroupEventArgs e) {
            if (tabbedControlGroup1.TabPages.Count == 2) return;
            DestroyTab(e.Group);
        }
        protected void CheckCloseButtonStatus() {
            if (tabbedControlGroup1.TabPages.Count == 2) tabbedControlGroup1.TabPages[0].ShowTabPageCloseButton = false;
            if (tabbedControlGroup1.TabPages.Count > 2) tabbedControlGroup1.TabPages[0].ShowTabPageCloseButton = true;
        }
        public void DestroyTab(LayoutGroup group) {
            tabbedControlGroup1.BeginUpdate();
            ((WebBrowser)((LayoutControlItem)group[0]).Control).Dispose();
            group.Dispose();
            CheckCloseButtonStatus();
            tabbedControlGroup1.EndUpdate();
        }
        int tabIndexToSelect = -1;
        private void tabbedControlGroup1_SelectedPageChanging(object sender, DevExpress.XtraLayout.LayoutTabPageChangingEventArgs e) {
            if (e.Page == tabbedControlGroup1.TabPages[tabbedControlGroup1.TabPages.Count - 1]) {
                if (!tabbedControlGroup1.IsUpdateLocked) {
                    CreateBrowserTab(defaultUrl);
                    e.Cancel = true;
                } else {
                    needDecreaseSelectedPageIndex = true;
                }
            }
        }
        protected void AsyncSelectTab() {
            tabbedControlGroup1.SelectedTabPageIndex = tabIndexToSelect;
        }
        private void tabbedControlGroup1_SelectedPageChanged(object sender, LayoutTabPageChangedEventArgs e) {
            if (needDecreaseSelectedPageIndex) {
                needDecreaseSelectedPageIndex = false;
                tabbedControlGroup1.SelectedTabPageIndex--;
            }
        }
        protected void CreateBrowserTab(String url) {
            layoutControl1.BeginUpdate();
            LayoutControlGroup newPage = new LayoutControlGroup();
            tabbedControlGroup1.InsertTabPage(tabbedControlGroup1.TabPages.Count - 1, newPage);
            newPage.ShowTabPageCloseButton = true;
            LayoutControlItem lci = newPage.AddItem();
            lci.Padding = new DevExpress.XtraLayout.Utils.Padding(0);
            lci.TextVisible = false;
            lci.BeginInit();
            WebBrowser browser = new WebBrowser();
            browser.Bounds = Rectangle.Empty;//antiflicker :)
            browser.Name = Guid.NewGuid().ToString();
            lci.Control = browser;
            lci.EndInit();
            SetUrlInSelectedTabPage(url);
            newPage.Text = url != "" ? url : "New Page";
            CheckCloseButtonStatus();
            tabIndexToSelect = tabbedControlGroup1.TabPages.IndexOf(newPage);
            BeginInvoke(new MethodInvoker(AsyncSelectTab));
            layoutControl1.EndUpdate();
        }
        private void UserControl1_Load(object sender, EventArgs e) {
            CreateBrowserTab(dxUrl);
            FillComboBoxValues();
        }
        protected void FillComboBoxValues() {
            string[] names = Enum.GetNames(tabbedControlGroup1.TextLocation.GetType());
            foreach (string name in names)
                comboBoxEdit1.Properties.Items.Add(name);
            comboBoxEdit1.SelectedIndex = 0;
        }
        private void simpleButton1_Click(object sender, EventArgs e) {
            tabbedControlGroup1.BeginUpdate();
            tabbedControlGroup1.SelectedTabPage.HideToCustomization();
            tabbedControlGroup1.EndUpdate();
        }

        private void urlEdit_KeyDown(object sender, KeyEventArgs e) {
            if (e.KeyCode == Keys.Enter) UpdateUrl();
        }

        private void checkEdit1_CheckedChanged(object sender, EventArgs e) {
            tabbedControlGroup1.MultiLine = checkEdit1.Checked ? DefaultBoolean.True : DefaultBoolean.False;
        }

        private void checkEdit2_CheckedChanged(object sender, EventArgs e) {
            tabbedControlGroup1.HeaderOrientation = checkEdit2.Checked ? DevExpress.XtraTab.TabOrientation.Vertical : DevExpress.XtraTab.TabOrientation.Horizontal;
        }

        private void comboBoxEdit1_SelectedIndexChanged(object sender, EventArgs e) {
            tabbedControlGroup1.TextLocation = (Locations)Enum.Parse(typeof(Locations), (string)comboBoxEdit1.Properties.Items[comboBoxEdit1.SelectedIndex]);
            checkEdit2_CheckedChanged(sender, e);
        }
    }
}