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87 lines
2.8 KiB
87 lines
2.8 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.Globalization;
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using System.Windows;
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using System.Windows.Controls.Primitives;
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using System.Windows.Data;
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namespace Xceed.Wpf.Toolkit.PropertyGrid.Converters
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{
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public class PropertyItemEditorConverter : IMultiValueConverter
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{
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public object Convert( object[] values, Type targetType, object parameter, CultureInfo culture )
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{
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if( ( values == null ) || ( values.Length != 2 ) )
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return null;
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var editor = values[ 0 ];
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var isReadOnly = values[ 1 ] as bool?;
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if( ( editor == null ) || !isReadOnly.HasValue )
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return editor;
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// Get Editor.IsReadOnly
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var editorType = editor.GetType();
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var editorIsReadOnlyPropertyInfo = editorType.GetProperty( "IsReadOnly" );
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if( editorIsReadOnlyPropertyInfo != null )
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{
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if( !this.IsPropertySetLocally( editor, TextBoxBase.IsReadOnlyProperty ) )
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{
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// Set Editor.IsReadOnly to PropertyGrid.IsReadOnly.
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editorIsReadOnlyPropertyInfo.SetValue( editor, isReadOnly, null );
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}
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}
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// No Editor.IsReadOnly property, set the Editor.IsEnabled property.
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else
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{
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var editorIsEnabledPropertyInfo = editorType.GetProperty( "IsEnabled" );
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if( editorIsEnabledPropertyInfo != null )
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{
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if( !this.IsPropertySetLocally( editor, UIElement.IsEnabledProperty ) )
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{
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// Set Editor.IsEnabled to !PropertyGrid.IsReadOnly.
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editorIsEnabledPropertyInfo.SetValue( editor, !isReadOnly, null );
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}
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}
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}
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return editor;
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}
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public object[] ConvertBack( object value, Type[] targetTypes, object parameter, CultureInfo culture )
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{
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throw new NotImplementedException();
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}
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private bool IsPropertySetLocally( object editor, DependencyProperty dp )
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{
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if( dp == null )
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return false;
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var editorObject = editor as DependencyObject;
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if( editorObject == null )
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return false;
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var valueSource = DependencyPropertyHelper.GetValueSource( editorObject, dp );
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if( valueSource == null )
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return false;
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return ( valueSource.BaseValueSource == BaseValueSource.Local );
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}
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}
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}
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