COM2PropertyBuilderUITypeEditor.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / COM2PropertyBuilderUITypeEditor.cs / 1305376 / COM2PropertyBuilderUITypeEditor.cs
                        

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

 
namespace System.Windows.Forms.ComponentModel.Com2Interop { 

    using Microsoft.Win32; 
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Diagnostics; 
    using System.Drawing;
    using System.Drawing.Design; 
    using System.Runtime.InteropServices; 
    using System.Windows.Forms.Design;
    using System.Globalization; 

    /// 
    /// 
    ///  
    internal class Com2PropertyBuilderUITypeEditor : Com2ExtendedUITypeEditor {
 
        private Com2PropertyDescriptor propDesc; 
        string  guidString;
        int     bldrType; 

        public Com2PropertyBuilderUITypeEditor(Com2PropertyDescriptor pd, string guidString, int type, UITypeEditor baseEditor) : base(baseEditor) {
            propDesc = pd;
            this.guidString = guidString; 
            this.bldrType = type;
        } 
 
        /// 
        ///  
        ///     Takes the value returned from valueAccess.getValue() and modifies or replaces
        ///     the value, passing the result into valueAccess.setValue().  This is where
        ///     an editor can launch a modal dialog or create a drop down editor to allow
        ///     the user to modify the value.  Host assistance in presenting UI to the user 
        ///     can be found through the valueAccess.getService function.
        ///  
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) { 

            IntPtr parentHandle = (IntPtr)UnsafeNativeMethods.GetFocus(); 

            IUIService uiSvc = (IUIService)provider.GetService(typeof(IUIService));
            if (uiSvc != null) {
                IWin32Window parent = uiSvc.GetDialogOwnerWindow(); 
                if (parent != null) {
                    parentHandle = parent.Handle; 
                } 
            }
 
            bool useValue = false;
            //VARIANT pValue = null;
            object pValue = value;
 
            try{
               object obj = propDesc.TargetObject; 
 

               if (obj is ICustomTypeDescriptor) { 
                  obj = ((ICustomTypeDescriptor)obj).GetPropertyOwner(propDesc);
               }

 
                Debug.Assert(obj is NativeMethods.IProvidePropertyBuilder, "object is not IProvidePropertyBuilder");
                NativeMethods.IProvidePropertyBuilder propBuilder = (NativeMethods.IProvidePropertyBuilder)obj; 
 
                if (NativeMethods.Failed(propBuilder.ExecuteBuilder(propDesc.DISPID,
                                                          guidString, 
                                                          null,
                                                          new HandleRef(null, parentHandle),
                                                          ref pValue, ref useValue))){
                    useValue = false; 
                }
 
            }catch(ExternalException ex) { 
                Debug.Fail("Failed to show property frame: " + ex.ErrorCode.ToString(CultureInfo.InvariantCulture));
            } 

            if (useValue && (bldrType & _CTLBLDTYPE.CTLBLDTYPE_FEDITSOBJDIRECTLY) == 0){

               return pValue;//pValue.ToVariant(); 
            }
            return value; 
        } 

        ///  
        /// 
        ///      Retrieves the editing style of the Edit method.  If the method
        ///      is not supported, this will return None.
        ///  
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) {
            return UITypeEditorEditStyle.Modal; 
        } 

    } 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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