PopOutPanel.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / PopOutPanel.cs / 1 / PopOutPanel.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.Drawing; 
    using System.Drawing.Design;
    using System.Globalization;
    using System.Web;
    using System.Web.UI; 
    using System.ComponentModel;
 
    ///  
    ///    Constructs a panel with automatic scrolling
    ///     and relative positioning for use with the Menu control. 
    /// 
    internal sealed class PopOutPanel : Panel {

        private Menu _owner; 
        private String _scrollerClass;
        private Style _scrollerStyle; 
        private Style _style; 
        private PopOutPanelStyle _emptyPopOutPanelStyle;
 
        public PopOutPanel(Menu owner, Style style) {
            _owner = owner;
            _style = style;
            _emptyPopOutPanelStyle = new PopOutPanelStyle(null); 
        }
 
        public override ScrollBars ScrollBars { 
            get {
                return ScrollBars.None; 
            }
        }

        internal String ScrollerClass { 
            get {
                return _scrollerClass; 
            } 
            set {
                _scrollerClass = value; 
            }
        }

        internal Style ScrollerStyle { 
            get {
                return _scrollerStyle; 
            } 
            set {
                _scrollerStyle = value; 
            }
        }

        ///  
        ///    Add positioning custom attributes.
        ///  
        protected override void AddAttributesToRender(HtmlTextWriter writer) { 
            string oldCssClass = CssClass;
            Style oldStyle = _style; 
            CssClass = String.Empty;
            _style = null;
            ControlStyle.Reset();
 
            base.AddAttributesToRender(writer);
 
            CssClass = oldCssClass; 
            _style = oldStyle;
 
            // Non-configurable style attributes
            RenderStyleAttributes(writer);
        }
 
        internal PopOutPanelStyle GetEmptyPopOutPanelStyle() {
            return _emptyPopOutPanelStyle; 
        } 

        public override void RenderEndTag(HtmlTextWriter writer) { 
            if (!_owner.DesignMode) {
                RenderScrollerAttributes(writer);
                writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID + "Up");
                writer.AddAttribute("onmouseover", "PopOut_Up(this)"); 
                writer.AddAttribute("onmouseout", "PopOut_Stop(this)");
                writer.RenderBeginTag(HtmlTextWriterTag.Div); 
                string scrollUpImageUrl = _owner.ScrollUpImageUrl; 
                if (scrollUpImageUrl.Length != 0) {
                    writer.AddAttribute(HtmlTextWriterAttribute.Src, _owner.ResolveClientUrl(scrollUpImageUrl)); 
                }
                else {
                    writer.AddAttribute(HtmlTextWriterAttribute.Src, _owner.GetImageUrl(Menu.ScrollUpImageIndex));
                } 
                writer.AddAttribute(HtmlTextWriterAttribute.Alt, _owner.ScrollUpText);
                writer.RenderBeginTag(HtmlTextWriterTag.Img); 
                writer.RenderEndTag(); 
                writer.RenderEndTag();
                RenderScrollerAttributes(writer); 
                writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID + "Dn");
                writer.AddAttribute("onmouseover", "PopOut_Down(this)");
                writer.AddAttribute("onmouseout", "PopOut_Stop(this)");
                writer.RenderBeginTag(HtmlTextWriterTag.Div); 
                string scrollDownImageUrl = _owner.ScrollDownImageUrl;
                if (scrollDownImageUrl.Length != 0) { 
                    writer.AddAttribute(HtmlTextWriterAttribute.Src, _owner.ResolveClientUrl(scrollDownImageUrl)); 
                }
                else { 
                    writer.AddAttribute(HtmlTextWriterAttribute.Src, _owner.GetImageUrl(Menu.ScrollDownImageIndex));
                }
                writer.AddAttribute(HtmlTextWriterAttribute.Alt, _owner.ScrollDownText);
                writer.RenderBeginTag(HtmlTextWriterTag.Img); 
                writer.RenderEndTag();
                writer.RenderEndTag(); 
            } 
            base.RenderEndTag(writer);
        } 

        private void RenderScrollerAttributes(HtmlTextWriter writer) {
            if ((Page != null) && Page.SupportsStyleSheets) {
                if (!String.IsNullOrEmpty(ScrollerClass)) { 
                    writer.AddAttribute(HtmlTextWriterAttribute.Class, ScrollerClass + ' ' +
                        GetEmptyPopOutPanelStyle().RegisteredCssClass); 
                } 
                else {
                    writer.AddAttribute(HtmlTextWriterAttribute.Class, GetEmptyPopOutPanelStyle().RegisteredCssClass); 
                }
            }
            else {
                if ((ScrollerStyle != null) && !ScrollerStyle.IsEmpty) { 
                    ScrollerStyle.AddAttributesToRender(writer);
                } 
                if (ScrollerStyle.BackColor.IsEmpty) { 
                    writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, "white");
                } 
                writer.AddStyleAttribute(HtmlTextWriterStyle.Visibility, "hidden");
                writer.AddStyleAttribute(HtmlTextWriterStyle.Display, "none");
                writer.AddStyleAttribute(HtmlTextWriterStyle.Position, "absolute");
                writer.AddStyleAttribute(HtmlTextWriterStyle.Left, "0px"); 
                writer.AddStyleAttribute(HtmlTextWriterStyle.Top, "0px");
            } 
            writer.AddStyleAttribute(HtmlTextWriterStyle.TextAlign, "center"); 
        }
 
        private void RenderStyleAttributes(HtmlTextWriter writer) {
            if (_style == null) {
                if (!String.IsNullOrEmpty(CssClass)) {
                    writer.AddAttribute(HtmlTextWriterAttribute.Class, CssClass); 
                }
                else { 
                    if (BackColor.IsEmpty) { 
                        writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, "white");
                    } 
                    else {
                        writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, ColorTranslator.ToHtml(BackColor));
                    }
                    if (!_owner.DesignMode) { 
                        writer.AddStyleAttribute(HtmlTextWriterStyle.Visibility, "hidden");
                        writer.AddStyleAttribute(HtmlTextWriterStyle.Display, "none"); 
                        writer.AddStyleAttribute(HtmlTextWriterStyle.Position, "absolute"); 
                        writer.AddStyleAttribute(HtmlTextWriterStyle.Left, "0px");
                        writer.AddStyleAttribute(HtmlTextWriterStyle.Top, "0px"); 
                    }
                }
            }
            else { 
                if ((Page != null) && Page.SupportsStyleSheets) {
                    string styleClass = _style.RegisteredCssClass; 
                    if (styleClass.Trim().Length > 0) { 
                        writer.AddAttribute(HtmlTextWriterAttribute.Class,
                            (!String.IsNullOrEmpty(CssClass)) ? 
                            styleClass + ' ' + CssClass:
                            styleClass);
                        return;
                    } 
                }
                if (!String.IsNullOrEmpty(CssClass)) { 
                    writer.AddAttribute(HtmlTextWriterAttribute.Class, CssClass); 
                }
                else { 
                    _style.AddAttributesToRender(writer);
                }
            }
        } 

        internal void SetInternalStyle(Style style) { 
            _style = style; 
        }
 
        internal sealed class PopOutPanelStyle : SubMenuStyle {
            private PopOutPanel _owner;

            public PopOutPanelStyle(PopOutPanel owner) { 
                _owner = owner;
            } 
 
            protected override void FillStyleAttributes(CssStyleCollection attributes, IUrlResolutionService urlResolver) {
                if (BackColor.IsEmpty && ((_owner == null) || _owner.BackColor.IsEmpty)) { 
                    attributes.Add(HtmlTextWriterStyle.BackgroundColor, "white");
                }
                attributes.Add(HtmlTextWriterStyle.Visibility, "hidden");
                attributes.Add(HtmlTextWriterStyle.Display, "none"); 
                attributes.Add(HtmlTextWriterStyle.Position, "absolute");
                attributes.Add(HtmlTextWriterStyle.Left, "0px"); 
                attributes.Add(HtmlTextWriterStyle.Top, "0px"); 
                base.FillStyleAttributes(attributes, urlResolver);
            } 
        }
    }
}

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