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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Interactivity;
namespace Tango.FSE.Common.Behaviors
{
public class StyleBehavior<TComponent, TBehavior> : Behavior<TComponent>
where TComponent : System.Windows.DependencyObject
where TBehavior : StyleBehavior<TComponent, TBehavior>, new()
{
public static DependencyProperty IsEnabledForStyleProperty =
DependencyProperty.RegisterAttached("IsEnabledForStyle", typeof(bool),
typeof(StyleBehavior<TComponent, TBehavior>), new FrameworkPropertyMetadata(false, OnIsEnabledForStyleChanged));
public bool IsEnabledForStyle
{
get { return (bool)GetValue(IsEnabledForStyleProperty); }
set { SetValue(IsEnabledForStyleProperty, value); }
}
private static void OnIsEnabledForStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
UIElement uie = d as UIElement;
if (uie != null)
{
var behColl = Interaction.GetBehaviors(uie);
var existingBehavior = behColl.FirstOrDefault(b => b.GetType() ==
typeof(TBehavior)) as TBehavior;
if ((bool)e.NewValue == false && existingBehavior != null)
{
behColl.Remove(existingBehavior);
}
else if ((bool)e.NewValue == true && existingBehavior == null)
{
behColl.Add(new TBehavior());
}
}
}
}
}
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