CategoryAttribute.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / CategoryAttribute.cs / 1 / CategoryAttribute.cs
                        

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

/* 
 */ 
namespace System.ComponentModel {
    using System; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Security.Permissions;
 
    /// 
    ///    Specifies the category in which the property or event will be displayed in a 
    ///       visual designer. 
    /// 
    [AttributeUsage(AttributeTargets.All)] 
    public class CategoryAttribute : Attribute {
        private static CategoryAttribute appearance;
        private static CategoryAttribute asynchronous;
        private static CategoryAttribute behavior; 
        private static CategoryAttribute data;
        private static CategoryAttribute design; 
        private static CategoryAttribute action; 
        private static CategoryAttribute format;
        private static CategoryAttribute layout; 
        private static CategoryAttribute mouse;
        private static CategoryAttribute key;
        private static CategoryAttribute focus;
        private static CategoryAttribute windowStyle; 
        private static CategoryAttribute dragDrop;
        private static CategoryAttribute defAttr; 
 
        private bool localized;
 
        /// 
        ///    
        ///       Provides the actual category name.
        ///     
        /// 
        private string categoryValue; 
 
        /// 
        ///    Gets the action category attribute. 
        /// 
        public static CategoryAttribute Action {
            get {
                if (action == null) { 
                    action = new CategoryAttribute("Action");
                } 
                return action; 
            }
        } 

        /// 
        ///    Gets the appearance category attribute.
        ///  
        public static CategoryAttribute Appearance {
            get { 
                if (appearance == null) { 
                    appearance = new CategoryAttribute("Appearance");
                } 
                return appearance;
            }
        }
 
        /// 
        ///    Gets the asynchronous category attribute. 
        ///  
        public static CategoryAttribute Asynchronous {
            get { 
                if (asynchronous == null) {
                    asynchronous = new CategoryAttribute("Asynchronous");
                }
                return asynchronous; 
            }
        } 
 
        /// 
        ///    Gets the behavior category attribute. 
        /// 
        public static CategoryAttribute Behavior {
            get {
                if (behavior == null) { 
                    behavior = new CategoryAttribute("Behavior");
                } 
                return behavior; 
            }
        } 

        /// 
        ///    Gets the data category attribute.
        ///  
        public static CategoryAttribute Data {
            get { 
                if (data == null) { 
                    data = new CategoryAttribute("Data");
                } 
                return data;
            }
        }
 
        /// 
        ///    Gets the default category attribute. 
        ///  
        public static CategoryAttribute Default {
            get { 
                if (defAttr == null) {
                    defAttr = new CategoryAttribute();
                }
                return defAttr; 
            }
        } 
 
        /// 
        ///    Gets the design category attribute. 
        /// 
        public static CategoryAttribute Design {
            get {
                if (design == null) { 
                    design = new CategoryAttribute("Design");
                } 
                return design; 
            }
        } 

        /// 
        ///    Gets the drag and drop category attribute.
        ///  
        public static CategoryAttribute DragDrop {
            get { 
                if (dragDrop == null) { 
                    dragDrop = new CategoryAttribute("DragDrop");
                } 
                return dragDrop;
            }
        }
 
        /// 
        ///    Gets the focus category attribute. 
        ///  
        public static CategoryAttribute Focus {
            get { 
                if (focus == null) {
                    focus = new CategoryAttribute("Focus");
                }
                return focus; 
            }
        } 
 
        /// 
        ///    Gets the format category attribute. 
        /// 
        public static CategoryAttribute Format {
            get {
                if (format == null) { 
                    format = new CategoryAttribute("Format");
                } 
                return format; 
            }
        } 

        /// 
        ///    Gets the keyboard category attribute.
        ///  
        public static CategoryAttribute Key {
            get { 
                if (key == null) { 
                    key = new CategoryAttribute("Key");
                } 
                return key;
            }
        }
 
        /// 
        ///    Gets the layout category attribute. 
        ///  
        public static CategoryAttribute Layout {
            get { 
                if (layout == null) {
                    layout = new CategoryAttribute("Layout");
                }
                return layout; 
            }
        } 
 
        /// 
        ///    Gets the mouse category attribute. 
        /// 
        public static CategoryAttribute Mouse {
            get {
                if (mouse == null) { 
                    mouse = new CategoryAttribute("Mouse");
                } 
                return mouse; 
            }
        } 

        /// 
        ///     Gets the window style category
        ///       attribute. 
        /// 
        public static CategoryAttribute WindowStyle { 
            get { 
                if (windowStyle == null) {
                    windowStyle = new CategoryAttribute("WindowStyle"); 
                }
                return windowStyle;
            }
        } 

        ///  
        /// Initializes a new instance of the  
        /// class with the default category.
        ///  
        public CategoryAttribute() : this("Default") {
        }

        ///  
        /// Initializes a new instance of the  class with
        ///    the specified category name. 
        ///  
        public CategoryAttribute(string category) {
            this.categoryValue = category; 
            this.localized = false;
        }

        ///  
        ///    Gets the name of the category for the property or event
        ///       that this attribute is bound to. 
        ///  
        public string Category {
            get { 
                if (!localized) {
                    localized = true;
                    string localizedValue = GetLocalizedString(categoryValue);
                    if (localizedValue != null) { 
                        categoryValue = localizedValue;
                    } 
                } 
                return categoryValue;
            } 
        }

        /// 
        ///  
        /// 
        ///  
        ///  
        /// 
        public override bool Equals(object obj){ 
            if (obj == this) {
                return true;
            }
 
            if (obj is CategoryAttribute){
                return Category.Equals(((CategoryAttribute)obj).Category); 
            } 
            return false;
        } 

        /// 
        ///    [To be supplied.]
        ///  
        public override int GetHashCode() {
            return Category.GetHashCode(); 
        } 

        ///  
        ///    Looks up the localized name of a given category.
        /// 
        protected virtual string GetLocalizedString(string value) {
            return (string)SR.GetObject("PropertyCategory" + value); 
        }
 
        ///  
        /// 
        ///  
        /// 
        /// 
        /// 
        public override bool IsDefaultAttribute() { 
            return Category.Equals(Default.Category);
        } 
    } 
}

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