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StateHelper
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GalaSoft.MvvmLight.Messaging;
using GTWin8.Messages;
using GTWin8.Ui;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace MvvmHelpers
{
/// <summary>
/// Copied from http://stackoverflow.com/questions/6002046/binding-visualstatemanager-view-state-to-a-mvvm-viewmodel
/// </summary>
public class StateHelper : DependencyObject
{
public static readonly DependencyProperty StateProperty = DependencyProperty.RegisterAttached(
"State", typeof(String), typeof(StateHelper), new PropertyMetadata("Normal", StateChanged));
internal static void StateChanged(DependencyObject target, DependencyPropertyChangedEventArgs args)
{
try
{
string newState = (string)args.NewValue;
Debug.WriteLine(String.Format("Attempting change from {0} to {1} on {2} ",args.OldValue, newState, target));
if (args.NewValue != null)
{
bool res = VisualStateManager.GoToState((Control)target, newState, true);
Messenger.Default.Send<StateChangedMessage>(new StateChangedMessage { Control = (Control)target, NewState = newState });
Debug.WriteLine("Result: " + res);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("StateHelper: " + ex.Message);
}
}
public static void SetState(DependencyObject obj, string value)
{
obj.SetValue(StateProperty, value);
}
public static string GetState(DependencyObject obj)
{
return (string)obj.GetValue(StateProperty);
}
}
}
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