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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Media3D;
namespace Xceed.Wpf.AvalonDock.Controls
{
public static class Extentions
{
public static IEnumerable<T> FindVisualChildren<T>( this DependencyObject depObj ) where T : DependencyObject
{
if( depObj != null )
{
for( int i = 0; i < VisualTreeHelper.GetChildrenCount( depObj ); i++ )
{
DependencyObject child = VisualTreeHelper.GetChild( depObj, i );
if( child != null && child is T )
{
yield return ( T )child;
}
foreach( T childOfChild in FindVisualChildren<T>( child ) )
{
yield return childOfChild;
}
}
}
}
public static IEnumerable<T> FindLogicalChildren<T>( this DependencyObject depObj ) where T : DependencyObject
{
if( depObj != null )
{
foreach( DependencyObject child in LogicalTreeHelper.GetChildren( depObj ).OfType<DependencyObject>() )
{
if( child != null && child is T )
{
yield return ( T )child;
}
foreach( T childOfChild in FindLogicalChildren<T>( child ) )
{
yield return childOfChild;
}
}
}
}
public static DependencyObject FindVisualTreeRoot( this DependencyObject initial )
{
DependencyObject current = initial;
DependencyObject result = initial;
while( current != null )
{
result = current;
if( current is Visual || current is Visual3D )
{
current = VisualTreeHelper.GetParent( current );
}
else
{
// If we're in Logical Land then we must walk
// up the logical tree until we find a
// Visual/Visual3D to get us back to Visual Land.
current = LogicalTreeHelper.GetParent( current );
}
}
return result;
}
public static T FindVisualAncestor<T>( this DependencyObject dependencyObject ) where T : class
{
DependencyObject target = dependencyObject;
do
{
target = VisualTreeHelper.GetParent( target );
}
while( target != null && !( target is T ) );
return target as T;
}
public static T FindLogicalAncestor<T>( this DependencyObject dependencyObject ) where T : class
{
DependencyObject target = dependencyObject;
do
{
var current = target;
target = LogicalTreeHelper.GetParent( target );
if( target == null )
target = VisualTreeHelper.GetParent( current );
}
while( target != null && !( target is T ) );
return target as T;
}
}
}
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