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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/***************************************************************************\
*
*
* Class for Xaml markup extension for TemplateBinds that
* can be set on the nodes of the Template VisualTree.
*
*
\***************************************************************************/
using System.ComponentModel;
using System.Windows.Data;
using System.Windows.Markup;
namespace System.Windows
{
/// <summary>
/// Class for Xaml markup extension for TemplateBindings that
/// can be set on the nodes of the Template VisualTree.
/// </summary>
[TypeConverter(typeof(TemplateBindingExtensionConverter))]
[MarkupExtensionReturnType(typeof(Object))]
public class TemplateBindingExtension : MarkupExtension
{
/// <summary>
/// Constructor that takes no parameters
/// </summary>
public TemplateBindingExtension()
{
}
/// <summary>
/// Constructor that takes the resource key that this is a static reference to.
/// </summary>
public TemplateBindingExtension(
DependencyProperty property)
{
ArgumentNullException.ThrowIfNull(property);
_property = property;
}
/// <summary>
/// Return an object that should be set on the targetObject's targetProperty
/// for this markup extension. For TemplateBindingExtension, this is the object found in
/// a resource dictionary in the current parent chain that is keyed by ResourceKey
/// </summary>
/// <param name="serviceProvider">ServiceProvider that can be queried for services.</param>
/// <returns>
/// The object to set on this property.
/// </returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (Property == null)
{
throw new InvalidOperationException(SR.MarkupExtensionProperty);
}
return new TemplateBindingExpression(this);
}
/// <summary>
/// Property we are binding to
/// </summary>
[ConstructorArgument("property")]
public DependencyProperty Property
{
get { return _property; }
set
{
ArgumentNullException.ThrowIfNull(value);
_property = value;
}
}
/// <summary>
/// ValueConverter to interpose between the source and target properties
/// </summary>
[DefaultValue(null)]
public IValueConverter Converter
{
get { return _converter; }
set
{
ArgumentNullException.ThrowIfNull(value);
_converter = value;
}
}
/// <summary>
/// ConverterParameter we are binding to
/// </summary>
[DefaultValue(null)]
public object ConverterParameter
{
get { return _parameter; }
set { _parameter = value; }
}
private DependencyProperty _property;
private IValueConverter _converter;
private object _parameter;
}
}
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