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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using Tango.PPC.Common.Notifications;
using Tango.Core;
using System.Collections.Concurrent;
using System.Windows.Media.Imaging;
using Tango.SharedUI.Helpers;
namespace Tango.PPC.UI.Notifications
{
public class DefaultNotificationProvider : ExtendedObject, INotificationProvider
{
private class PendingMessageBox
{
public MessageBoxVM VM { get; set; }
public TaskCompletionSource<bool> CompletionSource { get; set; }
}
private ConcurrentQueue<PendingMessageBox> _pendingMessageBoxes;
public DefaultNotificationProvider()
{
_pendingMessageBoxes = new ConcurrentQueue<PendingMessageBox>();
}
private MessageBoxVM _currentMessageBox;
public MessageBoxVM CurrentMessageBox
{
get { return _currentMessageBox; }
private set
{
_currentMessageBox = value;
RaisePropertyChangedAuto();
RaisePropertyChanged(nameof(HasMessageBox));
}
}
public bool HasMessageBox
{
get
{
return CurrentMessageBox != null;
}
}
public Task ShowError(string message)
{
return ShowMessageBox(new MessageBoxVM()
{
Message = message,
Icon = ResourceHelper.GetImageFromResources("Images/MessageBox Icons/information.png"),
Title = "Error",
Brush = Application.Current.Resources["TangoMessageBoxErrorBrush"] as Brush,
});
}
public Task ShowInfo(string message)
{
return ShowMessageBox(new MessageBoxVM()
{
Message = message,
Icon = ResourceHelper.GetImageFromResources("Images/MessageBox Icons/information.png"),
Title = "Information",
Brush = Application.Current.Resources["TangoMessageBoxInfoBrush"] as Brush,
});
}
public Task ShowWarning(string message)
{
return ShowMessageBox(new MessageBoxVM()
{
Message = message,
Icon = ResourceHelper.GetImageFromResources("Images/MessageBox Icons/information.png"),
Title = "Warning",
Brush = Application.Current.Resources["TangoMessageBoxWarningBrush"] as Brush,
});
}
public Task<bool> ShowQuestion(string message)
{
return ShowMessageBox(new MessageBoxVM()
{
Message = message,
Icon = ResourceHelper.GetImageFromResources("Images/MessageBox Icons/information.png"),
Title = "Confirm",
HasCancel = true,
Brush = Application.Current.Resources["TangoMessageBoxQuestionBrush"] as Brush,
});
}
private Task<bool> ShowMessageBox(MessageBoxVM vm)
{
TaskCompletionSource<bool> source = new TaskCompletionSource<bool>();
vm.Accepted += () => { OnMessageBoxClosed(); source.SetResult(true); };
vm.Canceled += () => { OnMessageBoxClosed(); source.SetResult(false); };
if (CurrentMessageBox == null)
{
CurrentMessageBox = vm;
}
else
{
_pendingMessageBoxes.Enqueue(new PendingMessageBox()
{
VM = vm,
CompletionSource = source,
});
}
return source.Task;
}
private void OnMessageBoxClosed()
{
CurrentMessageBox = null;
if (_pendingMessageBoxes.Count > 0)
{
PendingMessageBox p = null;
if (_pendingMessageBoxes.TryDequeue(out p))
{
CurrentMessageBox = p.VM;
}
}
}
}
}
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