PropertyTab.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / Design / PropertyTab.cs / 1305376 / PropertyTab.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms.Design { 
    using System.Runtime.InteropServices; 
    using System.ComponentModel;
    using System.Diagnostics; 
    using System;
    using System.Drawing;
    using System.Windows.Forms;
    using Microsoft.Win32; 
    using System.Runtime.Versioning;
 
    ///  
    /// 
    ///    Provides a base class for property tabs. 
    /// 
    [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name="FullTrust")]
    public abstract class PropertyTab : IExtenderProvider {
 
        private Object[] components;
        private Bitmap   bitmap; 
        private bool     checkedBmp; 

        ///  
        ~PropertyTab() {
            Dispose(false);
        }
 
        // don't override this. Just put a 16x16 bitmap in a file with the same name as your class in your resources.
        ///  
        ///  
        ///    Gets or sets a bitmap to display in the property tab.
        ///  
        public virtual Bitmap Bitmap {
            [ResourceExposure(ResourceScope.Machine)]
            [ResourceConsumption(ResourceScope.Machine)]
            get { 
                if (!checkedBmp && bitmap == null) {
                    string bmpName = GetType().Name + ".bmp"; 
                    try 
                    {
                        bitmap = new Bitmap(GetType(), bmpName); 
                    }
                    catch (Exception ex)
                    {
                        Debug.Fail("Failed to find bitmap '" + bmpName + "' for class " + GetType().FullName, ex.ToString()); 
                    }
                    checkedBmp = true; 
                } 
                return bitmap;
            } 
        }

        // don't override this either.
        ///  
        /// 
        ///    Gets or sets the array of components the property tab is associated with. 
        ///  
        public virtual Object[] Components {
            get { 
                return components;
            }
            set {
                this.components = value; 
            }
        } 
 
        // okay.  Override this to give a good TabName.
        ///  
        /// 
        ///    Gets or sets the name for the property tab.
        /// 
        public abstract string TabName { 
            get;
        } 
 
        /// 
        ///  
        ///    Gets or sets the help keyword that is to be associated with this tab. This defaults
        ///       to the tab name.
        /// 
        public virtual string HelpKeyword { 
            get {
                return TabName; 
            } 
        }
 
        // override this to reject components you don't want to support.
        /// 
        /// 
        ///    Gets a value indicating whether the specified object be can extended. 
        /// 
        public virtual bool CanExtend(Object extendee) { 
            return true; 
        }
 
        /// 
        /// 
        ///    [To be supplied.]
        ///  
        public virtual void Dispose() {
            Dispose(true); 
            GC.SuppressFinalize(this); 
        }
 
        /// 
        protected virtual void Dispose(bool disposing) {
            if (disposing) {
                if (bitmap != null) { 
                    bitmap.Dispose();
                    bitmap = null; 
                } 
            }
        } 

        // return the default property item
        /// 
        ///  
        ///    Gets the default property of the specified component.
        ///  
        public virtual PropertyDescriptor GetDefaultProperty(Object component) { 
            return TypeDescriptor.GetDefaultProperty(component);
        } 

        // okay, override this to return whatever you want to return... All properties must apply to component.
        /// 
        ///  
        ///    Gets the properties of the specified component.
        ///  
        public virtual PropertyDescriptorCollection GetProperties(Object component) { 
            return GetProperties(component, null);
        } 

        /// 
        /// 
        ///    Gets the properties of the specified component which match the specified 
        ///       attributes.
        ///  
        public abstract PropertyDescriptorCollection GetProperties(object component, Attribute[] attributes); 

        ///  
        /// 
        ///    Gets the properties of the specified component...
        /// 
        public virtual PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object component, Attribute[] attributes) { 
             return GetProperties(component, attributes);
        } 
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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PropertyTab.cs source code in C# .NET

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