tabstrip.cs

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//------------------------------------------------------------------------------
// Copyright (c) 2000-2003 Microsoft Corporation. All Rights Reserved.
//------------------------------------------------------------------------------

namespace Microsoft.Web.UI.WebControls
{
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Drawing;
    using System.Drawing.Design;
    using System.Collections;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Reflection;

    /// <summary>
    /// Specifies the orientation that a control can be in.
    /// </summary>
    public enum Orientation
    {
        /// <summary>
        /// Indicates a horizontal orientation.
        /// </summary>
        Horizontal,

        /// <summary>
        /// Indicates a vertical orientation.
        /// </summary>
        Vertical
    };

    /// <summary>
    /// Represents a control that contains a row of tabs and separators.
    /// </summary>
    [
    ParseChildren(true, "Items"),
    DefaultEvent("SelectedIndexChange"),
    Designer(typeof(Microsoft.Web.UI.WebControls.Design.TabStripDesigner)),
    ToolboxBitmap(typeof(Microsoft.Web.UI.WebControls.TabStrip)),
    ToolboxData(@"<{0}:TabStrip runat=""server"" 
                      TabDefaultStyle=""background-color:#000000;font-family:verdana;font-weight:bold;font-size:8pt;color:#ffffff;width:79;height:21;text-align:center""
                      TabHoverStyle=""background-color:#777777""
                      TabSelectedStyle=""background-color:#ffffff;color:#000000"">
                    <{0}:Tab Text=""Tab 1"" />
                    <{0}:Tab Text=""Tab 2"" />
                    <{0}:Tab Text=""Tab 3"" />
                  </{0}:TabStrip>"),
    ]
    public class TabStrip : BasePostBackControl
    {
        /// <summary>
        /// The namespace for the TabStrip and its children.
        /// </summary>
        public const string TagNamespace = "TSNS";

        /// <summary>
        /// The TabStrip's tag name.
        /// </summary>
        public const string TabStripTagName = "TabStrip";

        /// <summary>
        /// The Tab's tag name.
        /// </summary>
        public const string TabTagName = "Tab";

        /// <summary>
        /// The TabSeparator's tag name.
        /// </summary>
        public const string TabSeparatorTagName = "TabSeparator";

        /// <summary>
        /// Event fired when the SelectedIndex property changes.
        /// </summary>
        [ResDescription("TabStripSelectedIndexChange")]
        public event EventHandler SelectedIndexChange;

        private TabItemCollection _Items;
        private int _CachedSelectedIndex;
        private int _OldMultiPageIndex;
        private CssCollection _TabDefaultStyle;
        private CssCollection _TabHoverStyle;
        private CssCollection _TabSelectedStyle;
        private CssCollection _SepDefaultStyle;
        private CssCollection _SepHoverStyle;
        private CssCollection _SepSelectedStyle;

        // Constant to indicate that there is no selection
        private const int NoSelection = -1;

        // Constant to indicate that the value is not set
        private const int NotSet = -2;

        /// <summary>
        /// Initializes a new instance of a TabStrip.
        /// </summary>
        public TabStrip() : base()
        {
            _Items = new TabItemCollection(this);
            _CachedSelectedIndex = NotSet;
            _OldMultiPageIndex = -1;
            _TabDefaultStyle = new CssCollection();
            _TabHoverStyle = new CssCollection();
            _TabSelectedStyle = new CssCollection();
            _SepDefaultStyle = new CssCollection();
            _SepHoverStyle = new CssCollection();
            _SepSelectedStyle = new CssCollection();
        }

        /// <summary>
        /// Gets the collection of items in the control.
        /// </summary>
        [
        Category("Data"),
        DefaultValue(null),
        MergableProperty(false),
        PersistenceMode(PersistenceMode.InnerDefaultProperty),
        ResDescription("TabStripItems"),
        ]
        public virtual TabItemCollection Items
        {
            get { return _Items; }
        }

        /// <summary>
        /// The ID of the MultiPage whose pages will change when the SelectedIndex changes.
        /// </summary>
        [
        Category("Behavior"),
        DefaultValue(""),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("TabStripTargetID"),
        ]
        public string TargetID
        {
            get
            {
                object obj = ViewState["TargetID"];
                return (obj == null) ? String.Empty : (string)obj;
            }

            set { ViewState["TargetID"] = value; }
        }

        /// <summary>
        /// The target MultiPage whose pages will change when the SelectedIndex changes.
        /// </summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public MultiPage Target
        {
            get
            {
                string id = TargetID;
                if (id == String.Empty)
                {
                    return null;
                }

                Control ctrl = null;
                Control container = NamingContainer;
                Control page = Page;

                if (container != null)
                {
                    ctrl = container.FindControl(id);
                }
                if ((ctrl == null) && (page != null))
                {
                    ctrl = page.FindControl(id);
                }

                if ((ctrl != null) && (ctrl is MultiPage))
                {
                    return (MultiPage)ctrl;
                }

                return null;
            }
        }

        /// <summary>
        /// The default image url for separators.
        /// </summary>
        [
        Category("Separator Defaults"),
        DefaultValue(""),
        Editor(typeof(System.Web.UI.Design.ImageUrlEditor), typeof(UITypeEditor)),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("SepDefaultImageUrl"),
        ]
        public string SepDefaultImageUrl
        {
            get
            {
                Object obj = ViewState["SepDefaultImageUrl"];
                return (obj == null) ? String.Empty : (string)obj;
            }

            set { ViewState["SepDefaultImageUrl"] = value; }
        }

        /// <summary>
        /// The default image url for separators when they are next to
        /// a hovered tab but not next to a selected tab.
        /// </summary>
        [
        Category("Separator Defaults"),
        DefaultValue(""),
        Editor(typeof(System.Web.UI.Design.ImageUrlEditor), typeof(UITypeEditor)),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("SepHoverImageUrl"),
        ]
        public string SepHoverImageUrl
        {
            get
            {
                Object obj = ViewState["SepHoverImageUrl"];
                return (obj == null) ? String.Empty : (string)obj;
            }

            set { ViewState["SepHoverImageUrl"] = value; }
        }

        /// <summary>
        /// The default image url for separators when they are next to a selected tab.
        /// </summary>
        [
        Category("Separator Defaults"),
        DefaultValue(""),
        Editor(typeof(System.Web.UI.Design.ImageUrlEditor), typeof(UITypeEditor)),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("SepSelectedImageUrl"),
        ]
        public string SepSelectedImageUrl
        {
            get
            {
                Object obj = ViewState["SepSelectedImageUrl"];
                return (obj == null) ? String.Empty : (string)obj;
            }

            set { ViewState["SepSelectedImageUrl"] = value; }
        }

        /// <summary>
        /// The default style for tabs.
        /// </summary>
        [
        Category("Tab Defaults"),
        DefaultValue(typeof(CssCollection), ""),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("TabDefaultStyle"),
        ]
        public CssCollection TabDefaultStyle
        {
            get { return _TabDefaultStyle; }
            set
            {
                _TabDefaultStyle = value;
                if (IsTrackingViewState)
                {
                    ((IStateManager)_TabDefaultStyle).TrackViewState();
                    _TabDefaultStyle.Dirty = true;
                }
            }
        }

        /// <summary>
        /// The default style for tabs when they are hovered.
        /// </summary>
        [
        Category("Tab Defaults"),
        DefaultValue(typeof(CssCollection), ""),
        PersistenceMode(PersistenceMode.Attribute),
        ResDescription("TabHoverStyle"),
        ]
        public CssCollection TabHoverStyle
        {
            get { return _TabHoverStyle; }
            set
            {
                _TabHoverStyle = value;
                if (IsTrackingViewState)
                {
                    ((IStateManager)_TabHoverStyle).TrackViewState();
                    _TabHoverStyle.Dirty = true;
                }
            }
        }

        /// <summary>
        /// The default style for tabs when they are selected.
        /// </summary>