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70 lines
2.4 KiB
70 lines
2.4 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.Windows;
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using System.Windows.Controls;
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using System.Windows.Media;
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using System.Windows.Data;
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namespace Xceed.Wpf.Toolkit.PropertyGrid
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{
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public abstract class EditorDefinitionBase : PropertyDefinitionBase
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{
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internal EditorDefinitionBase() { }
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internal FrameworkElement GenerateEditingElementInternal( PropertyItemBase propertyItem )
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{
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return this.GenerateEditingElement( propertyItem );
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}
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protected virtual FrameworkElement GenerateEditingElement( PropertyItemBase propertyItem ) { return null; }
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internal void UpdateProperty( FrameworkElement element, DependencyProperty elementProp, DependencyProperty definitionProperty )
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{
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object currentValue = this.GetValue( definitionProperty );
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object localValue = this.ReadLocalValue( definitionProperty );
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object elementValue = element.GetValue( elementProp );
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bool areEquals = false;
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// Avoid setting values if it does not affect anything
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// because setting a local value may prevent a style setter from being active.
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if( localValue != DependencyProperty.UnsetValue )
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{
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if( ( elementValue != null ) && ( currentValue != null ) )
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{
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areEquals = ( elementValue.GetType().IsValueType && currentValue.GetType().IsValueType )
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? elementValue.Equals( currentValue ) // Value Types
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: currentValue == element.GetValue( elementProp ); // Reference Types
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}
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if( !areEquals )
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{
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element.SetValue( elementProp, currentValue );
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}
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else
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{
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element.ClearValue( elementProp );
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}
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}
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}
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}
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}
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