public void SetView(Type view)
{
foreach (ViewBase openView in OpenViews)
{
if (openView.GetType().Equals(view))
{
CurrentView = openView;
CurrentView.Reset();
return;
}
}
CurrentView = Activator.CreateInstance(view) as ViewBase;
if (CurrentView.TargetDataContext == null)
{
CurrentView.DataContext = this;
}
else
{
var context = Activator.CreateInstance(CurrentView.TargetDataContext, new object[] { mediator });
var type = CurrentView.TargetDataContext;
CurrentView.DataContext = Convert.ChangeType(context, type);
}
OpenViews.Add(CurrentView);
}
/// <summary>
/// Handler for Closed event, triggered when window is about to close.
/// </summary>
/// <param name="sender">Window object</param>
private void WindowClosed(object sender, EventArgs e)
{
Window window = (Window)sender;
window.Closed -= WindowClosed;
OpenViews.Remove(window);
}
/// <summary>
/// Creates instance of Window of type T and shows it.
/// </summary>
/// <typeparam name="T">Window type</typeparam>
public void OpenWindow <T>() where T : Window
{
if (!CheckIfAlreadyOpened(typeof(T)))
{
Window window = (T)Activator.CreateInstance(typeof(T));
window.Closed += WindowClosed;
window.Show();
OpenViews.Add(window, window.DataContext);
}
}
/// <summary>
/// Finds Window in ActiveViews dictionary basing on VM value, closes this window, removes from dictionary.
/// </summary>
/// <param name="viewModel">View model object</param>
public void CloseWindow(object viewModel)
{
if (viewModel != null)
{
Type type = viewModel.GetType();
Window window = OpenViews.FirstOrDefault(view => view.Value.GetType() == type).Key as Window;
if (window != null)
{
window.Close();
}
}
}
private void DialogWindowClosed(object sender, EventArgs e)
{
Window window = (Window)sender;
window.Closed -= DialogWindowClosed;
OpenViews.Remove(window);
var vm = window.DataContext as IDialogViewModel;
DialogResult = vm.DialogResult;
Returned = true;
}
public async Task <bool?> OpenDialogWindow <T>() where T : Window
{
Returned = false;
if (!CheckIfAlreadyOpened(typeof(T)))
{
Window window = (T)Activator.CreateInstance(typeof(T));
window.Closed += DialogWindowClosed;
window.Show();
OpenViews.Add(window, window.DataContext);
while (!Returned)
{
await Task.Delay(100);
}
return(DialogResult);
}
return(null);
}
/// <summary>
/// Verify if window can be found in ActiveViews.
/// </summary>
/// <param name="type">Window type</param>
/// <returns>is opened or not</returns>
private bool CheckIfAlreadyOpened(Type type)
{
return(OpenViews.Select(view => view.Key.GetType() == type).FirstOrDefault());
}
