ToolZone.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 / WebParts / ToolZone.cs / 1 / ToolZone.cs
                        

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

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Drawing;
    using System.Drawing.Design;
    using System.Globalization; 
    using System.Security.Permissions;
    using System.Web.UI; 
    using System.Web.UI.WebControls; 
    using System.Web.Util;
 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public abstract class ToolZone : WebZone, IPostBackEventHandler {
 
        private const string headerCloseEventArgument = "headerClose";
 
        private const int baseIndex = 0; 
        private const int editUIStyleIndex = 1;
        private const int headerCloseVerbIndex = 3; 
        private const int headerVerbStyleIndex = 4;
        private const int instructionTextStyleIndex = 5;
        private const int labelStyleIndex = 6;
        private const int viewStateArrayLength = 7; 

        private Style _editUIStyle; 
        private WebPartVerb _headerCloseVerb; 
        private Style _headerVerbStyle;
        private Style _instructionTextStyle; 
        private Style _labelStyle;

        private WebPartDisplayModeCollection _associatedDisplayModes;
 
        protected ToolZone(ICollection associatedDisplayModes) {
            if ((associatedDisplayModes == null) || (associatedDisplayModes.Count == 0)) { 
                throw new ArgumentNullException("associatedDisplayModes"); 
            }
 
            _associatedDisplayModes = new WebPartDisplayModeCollection();
            foreach (WebPartDisplayMode mode in associatedDisplayModes) {
                _associatedDisplayModes.Add(mode);
            } 
            _associatedDisplayModes.SetReadOnly(SR.ToolZone_DisplayModesReadOnly);
        } 
 
        protected ToolZone(WebPartDisplayMode associatedDisplayMode) {
            if (associatedDisplayMode == null) { 
                throw new ArgumentNullException("associatedDisplayMode");
            }

            _associatedDisplayModes = new WebPartDisplayModeCollection(); 
            _associatedDisplayModes.Add(associatedDisplayMode);
            _associatedDisplayModes.SetReadOnly(SR.ToolZone_DisplayModesReadOnly); 
        } 

        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public WebPartDisplayModeCollection AssociatedDisplayModes { 
            get {
                return _associatedDisplayModes; 
            } 
        }
 
        protected virtual bool Display {
            get {
                if (WebPartManager != null) {
                    WebPartDisplayModeCollection associatedDisplayModes = AssociatedDisplayModes; 

                    if (associatedDisplayModes != null) { 
                        return associatedDisplayModes.Contains(WebPartManager.DisplayMode); 
                    }
                } 
                return false;
            }
        }
 
        [
        DefaultValue(null), 
        NotifyParentProperty(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        PersistenceMode(PersistenceMode.InnerProperty), 
        WebCategory("Styles"),
        WebSysDescription(SR.ToolZone_EditUIStyle),
        ]
        public Style EditUIStyle { 
            get {
                if (_editUIStyle == null) { 
                    _editUIStyle = new Style(); 
                    if (IsTrackingViewState) {
                        ((IStateManager)_editUIStyle).TrackViewState(); 
                    }
                }

                return _editUIStyle; 
            }
        } 
 
        [
        DefaultValue(null), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        NotifyParentProperty(true),
        PersistenceMode(PersistenceMode.InnerProperty),
        WebCategory("Verbs"), 
        WebSysDescription(SR.ToolZone_HeaderCloseVerb),
        ] 
        public virtual WebPartVerb HeaderCloseVerb { 
            get {
                if (_headerCloseVerb == null) { 
                    _headerCloseVerb = new WebPartHeaderCloseVerb();
                    _headerCloseVerb.EventArgument = headerCloseEventArgument;
                    if (IsTrackingViewState) {
                        ((IStateManager)_headerCloseVerb).TrackViewState(); 
                    }
                } 
                return _headerCloseVerb; 
            }
        } 

        [
        DefaultValue(null),
        NotifyParentProperty(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        PersistenceMode(PersistenceMode.InnerProperty), 
        WebCategory("Styles"), 
        WebSysDescription(SR.ToolZone_HeaderVerbStyle),
        ] 
        public Style HeaderVerbStyle {
            get {
                if (_headerVerbStyle == null) {
                    _headerVerbStyle = new Style(); 
                    if (IsTrackingViewState) {
                        ((IStateManager)_headerVerbStyle).TrackViewState(); 
                    } 
                }
 
                return _headerVerbStyle;
            }
        }
 
        [
        // Must use WebSysDefaultValue instead of DefaultValue, since it is overridden in extending classes 
        Localizable(true), 
        WebSysDefaultValue(""),
        WebCategory("Behavior"), 
        WebSysDescription(SR.ToolZone_InstructionText),
        ]
        public virtual string InstructionText {
            get { 
                string s = (string)ViewState["InstructionText"];
                return((s == null) ? String.Empty : s); 
            } 
            set {
                ViewState["InstructionText"] = value; 
            }
        }

        [ 
        DefaultValue(null),
        NotifyParentProperty(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        PersistenceMode(PersistenceMode.InnerProperty),
        WebCategory("Styles"), 
        WebSysDescription(SR.ToolZone_InstructionTextStyle),
        ]
        public Style InstructionTextStyle {
            get { 
                if (_instructionTextStyle == null) {
                    _instructionTextStyle = new Style(); 
                    if (IsTrackingViewState) { 
                        ((IStateManager)_instructionTextStyle).TrackViewState();
                    } 
                }

                return _instructionTextStyle;
            } 
        }
 
        [ 
        DefaultValue(null),
        NotifyParentProperty(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        PersistenceMode(PersistenceMode.InnerProperty),
        WebCategory("Styles"),
        WebSysDescription(SR.ToolZone_LabelStyle), 
        ]
        public Style LabelStyle { 
            get { 
                if (_labelStyle == null) {
                    _labelStyle = new Style(); 
                    if (IsTrackingViewState) {
                        ((IStateManager)_labelStyle).TrackViewState();
                    }
                } 

                return _labelStyle; 
            } 
        }
 
        [
        Bindable(false),
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        EditorBrowsable(EditorBrowsableState.Never),
        ] 
        public override bool Visible { 
            get {
                return Display && base.Visible; 
            }
            set {
                if (!DesignMode) {
                    throw new InvalidOperationException(SR.GetString(SR.ToolZone_CantSetVisible)); 
                }
            } 
        } 

        protected abstract void Close(); 

        protected override void LoadViewState(object savedState) {
            if (savedState == null) {
                base.LoadViewState(null); 
            }
            else { 
                object[] myState = (object[]) savedState; 
                if (myState.Length != viewStateArrayLength) {
                    throw new ArgumentException(SR.GetString(SR.ViewState_InvalidViewState)); 
                }

                base.LoadViewState(myState[baseIndex]);
                if (myState[editUIStyleIndex] != null) { 
                    ((IStateManager) EditUIStyle).LoadViewState(myState[editUIStyleIndex]);
                } 
                if (myState[headerCloseVerbIndex] != null) { 
                    ((IStateManager) HeaderCloseVerb).LoadViewState(myState[headerCloseVerbIndex]);
                } 
                if (myState[headerVerbStyleIndex] != null) {
                    ((IStateManager) HeaderVerbStyle).LoadViewState(myState[headerVerbStyleIndex]);
                }
                if (myState[instructionTextStyleIndex] != null) { 
                    ((IStateManager) InstructionTextStyle).LoadViewState(myState[instructionTextStyleIndex]);
                } 
                if (myState[labelStyleIndex] != null) { 
                    ((IStateManager) LabelStyle).LoadViewState(myState[labelStyleIndex]);
                } 
            }
        }

        protected virtual void OnDisplayModeChanged(object sender, WebPartDisplayModeEventArgs e) { 
        }
 
        ///  
        protected internal override void OnInit(EventArgs e) {
            base.OnInit(e); 

            WebPartManager webPartManager = WebPartManager;
            if (webPartManager != null) {
                webPartManager.DisplayModeChanged += new WebPartDisplayModeEventHandler(OnDisplayModeChanged); 
                webPartManager.SelectedWebPartChanged += new WebPartEventHandler(OnSelectedWebPartChanged);
            } 
        } 

        protected virtual void OnSelectedWebPartChanged(object sender, WebPartEventArgs e) { 
        }

        protected virtual void RaisePostBackEvent(string eventArgument) {
            ValidateEvent(UniqueID, eventArgument); 

            if (String.Equals(eventArgument, headerCloseEventArgument, StringComparison.OrdinalIgnoreCase) && 
                HeaderCloseVerb.Visible && HeaderCloseVerb.Enabled) { 
                Close();
            } 
        }

        protected override void RenderFooter(HtmlTextWriter writer) {
            writer.AddStyleAttribute(HtmlTextWriterStyle.Margin, "4px"); 
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            RenderVerbs(writer); 
            writer.RenderEndTag();  // Div 
        }
 
        protected override void RenderHeader(HtmlTextWriter writer) {
            // Render title bar
            writer.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");
            writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "2"); 
            writer.AddAttribute(HtmlTextWriterAttribute.Border, "0");
            writer.AddStyleAttribute(HtmlTextWriterStyle.Width, "100%"); 
 
            TitleStyle headerStyle = HeaderStyle;
            if (!headerStyle.IsEmpty) { 
                // Apply font and forecolor from HeaderStyle to inner table
                Style style = new Style();
                if (!headerStyle.ForeColor.IsEmpty) {
                    style.ForeColor = headerStyle.ForeColor; 
                }
                style.Font.CopyFrom(headerStyle.Font); 
                if (!headerStyle.Font.Size.IsEmpty) { 
                    // If the font size is specified on the HeaderStyle, force the font size to 100%,
                    // so it inherits the font size from its parent in IE compatibility mode. I would 
                    // think that "1em" would work here as well, but "1em" doesn't work when you change
                    // the font size in the browser.
                    style.Font.Size = new FontUnit(new Unit(100, UnitType.Percentage));
                } 
                if (!style.IsEmpty) {
                    style.AddAttributesToRender(writer, this); 
                } 
            }
 
            writer.RenderBeginTag(HtmlTextWriterTag.Table);

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);
 
            // Copied from Panel.cs
            // 
            HorizontalAlign hAlign = headerStyle.HorizontalAlign; 
            if (hAlign != HorizontalAlign.NotSet) {
                TypeConverter hac = TypeDescriptor.GetConverter(typeof(HorizontalAlign)); 
                writer.AddAttribute(HtmlTextWriterAttribute.Align, hac.ConvertToString(hAlign));
            }

            writer.AddStyleAttribute(HtmlTextWriterStyle.Width, "100%"); 
            writer.AddStyleAttribute(HtmlTextWriterStyle.WhiteSpace, "nowrap");
            writer.RenderBeginTag(HtmlTextWriterTag.Td); 
            writer.Write(HeaderText); 
            writer.RenderEndTag();  // Td
 
            WebPartVerb headerCloseVerb = HeaderCloseVerb;
            if (headerCloseVerb.Visible) {
                writer.AddStyleAttribute(HtmlTextWriterStyle.WhiteSpace, "nowrap");
                writer.RenderBeginTag(HtmlTextWriterTag.Td); 
                ZoneLinkButton closeButton = new ZoneLinkButton(this, headerCloseVerb.EventArgument);
                closeButton.Text = headerCloseVerb.Text; 
                closeButton.ImageUrl = headerCloseVerb.ImageUrl; 
                closeButton.ToolTip = headerCloseVerb.Description;
                closeButton.Enabled = headerCloseVerb.Enabled; 
                closeButton.Page = Page;
                closeButton.ApplyStyle(HeaderVerbStyle);
                closeButton.RenderControl(writer);
                writer.RenderEndTag();  // Td 
            }
 
            writer.RenderEndTag();  // Tr 
            writer.RenderEndTag();  // Table
        } 

        protected virtual void RenderVerbs(HtmlTextWriter writer) {
        }
 
        internal void RenderVerbsInternal(HtmlTextWriter writer, ICollection verbs) {
            ArrayList visibleVerbs = new ArrayList(); 
            foreach (WebPartVerb verb in verbs) { 
                if (verb.Visible) {
                    visibleVerbs.Add(verb); 
                }
            }

            // Render   between each pair of verbs (VSWhidbey 77709) 
            if (visibleVerbs.Count > 0) {
                bool firstVerb = true; 
                foreach (WebPartVerb verb in visibleVerbs) { 
                    if (!firstVerb) {
                        writer.Write(" "); 
                    }
                    RenderVerb(writer, verb);
                    firstVerb = false;
                } 
            }
        } 
 
        protected virtual void RenderVerb(HtmlTextWriter writer, WebPartVerb verb) {
            string eventArgument = verb.EventArgument; 
            WebControl verbControl;
            if (VerbButtonType == ButtonType.Button) {
                ZoneButton button = new ZoneButton(this, eventArgument);
                button.Text = verb.Text; 
                verbControl = button;
            } else { 
                ZoneLinkButton linkButton = new ZoneLinkButton(this, eventArgument); 
                linkButton.Text = verb.Text;
                if (VerbButtonType == ButtonType.Image) { 
                    linkButton.ImageUrl = verb.ImageUrl;
                }
                verbControl = linkButton;
            } 

            verbControl.ApplyStyle(VerbStyle); 
            verbControl.ToolTip = verb.Description; 
            verbControl.Enabled = verb.Enabled;
            verbControl.Page = Page; 
            verbControl.RenderControl(writer);
        }

        protected override object SaveViewState() { 
            object[] myState = new object[viewStateArrayLength];
 
            myState[baseIndex] = base.SaveViewState(); 
            myState[editUIStyleIndex] = (_editUIStyle != null) ? ((IStateManager)_editUIStyle).SaveViewState() : null;
            myState[headerCloseVerbIndex] = (_headerCloseVerb != null) ? ((IStateManager)_headerCloseVerb).SaveViewState() : null; 
            myState[headerVerbStyleIndex] = (_headerVerbStyle != null) ? ((IStateManager)_headerVerbStyle).SaveViewState() : null;
            myState[instructionTextStyleIndex] = (_instructionTextStyle != null) ? ((IStateManager)_instructionTextStyle).SaveViewState() : null;
            myState[labelStyleIndex] = (_labelStyle != null) ? ((IStateManager)_labelStyle).SaveViewState() : null;
 
            for (int i=0; i < viewStateArrayLength; i++) {
                if (myState[i] != null) { 
                    return myState; 
                }
            } 

            // More performant to return null than an array of null values
            return null;
        } 

        protected override void TrackViewState() { 
            base.TrackViewState(); 

            if (_editUIStyle != null) { 
                ((IStateManager) _editUIStyle).TrackViewState();
            }
            if (_headerCloseVerb != null) {
                ((IStateManager) _headerCloseVerb).TrackViewState(); 
            }
            if (_headerVerbStyle != null) { 
                ((IStateManager) _headerVerbStyle).TrackViewState(); 
            }
            if (_instructionTextStyle != null) { 
                ((IStateManager) _instructionTextStyle).TrackViewState();
            }
            if (_labelStyle != null) {
                ((IStateManager) _labelStyle).TrackViewState(); 
            }
        } 
 
        #region Implementation of IPostBackEventHandler
        ///  
        void IPostBackEventHandler.RaisePostBackEvent(string eventArgument) {
            RaisePostBackEvent(eventArgument);
        }
        #endregion 
    }
}

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK