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64 lines
1.9 KiB
64 lines
1.9 KiB
/*************************************************************************************
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Extended WPF Toolkit
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Copyright (C) 2007-2013 Xceed Software Inc.
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This program is provided to you under the terms of the Microsoft Public
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License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
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For more features, controls, and fast professional support,
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pick up the Plus Edition at http://xceed.com/wpf_toolkit
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Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
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***********************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Collections;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using Xceed.Wpf.Toolkit.PropertyGrid.Converters;
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using System.Windows;
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using Xceed.Wpf.Toolkit.Core.Utilities;
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using System.Linq.Expressions;
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namespace Xceed.Wpf.Toolkit.PropertyGrid
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{
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public abstract class DefinitionBase : DependencyObject
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{
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private bool _isLocked;
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internal bool IsLocked
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{
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get { return _isLocked; }
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}
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internal void ThrowIfLocked<TMember>( Expression<Func<TMember>> propertyExpression )
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{
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//In XAML, when using any properties of PropertyDefinition, the error of ThrowIfLocked is always thrown => prevent it !
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if( DesignerProperties.GetIsInDesignMode( this ) )
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return;
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if( this.IsLocked )
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{
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string propertyName = ReflectionHelper.GetPropertyOrFieldName( propertyExpression );
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string message = string.Format(
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@"Cannot modify {0} once the definition has beed added to a collection.",
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propertyName );
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throw new InvalidOperationException( message );
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}
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}
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internal virtual void Lock()
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{
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if( !_isLocked )
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{
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_isLocked = true;
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}
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}
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}
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}
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