/// <summary>
/// Shows a dialog with the specified view model.
/// </summary>
/// <param name="window">The window to show.</param>
/// <param name="viewModel">The view model to use.</param>
/// <param name="owner">The owner window information. If it is null, the default is used.</param>
public static void ShowDialogWithViewModel(this Window window, object viewModel, OwnerWindowInfo owner = null)
{
ShowWithViewModel
(
window: window,
viewModel: viewModel,
owner: owner,
isDialog: true
);
}
/// <summary>
/// Shows a window with the specified view model.
/// </summary>
/// <param name="window">The window to show.</param>
/// <param name="viewModel">The view model to use.</param>
/// <param name="isDialog">Whether the ShowDialog method is used.</param>
/// <param name="owner">The owner window information. If it is null, the default is used.</param>
public static void ShowWithViewModel(Window window, object viewModel, bool isDialog, OwnerWindowInfo owner = null)
{
if (window == null)
{
throw new ArgumentNullException(nameof(window));
}
// Initializes the window.
window.Owner = owner != null
? owner.OwnerWindow
: Application.Current.Windows.Cast <Window>().FirstOrDefault(p => p.IsActive);
window.DataContext = viewModel;
// Handles closing by the view model.
var closableViewModel = viewModel as IClosableViewModel;
if (closableViewModel != null)
{
// Handles events for closing.
bool isCloseRequested = false;
window.Closing += (_, args) =>
{
// The close must be controlled by the view model.
if (isCloseRequested == false)
{
args.Cancel = true;
window.Dispatcher.BeginInvoke(new Action(() => closableViewModel.RequestClose()));
}
};
EventHandler closeRequestedHandler = (_, __) =>
{
isCloseRequested = true;
window.Close();
};
window.Closed += (_, __) => closableViewModel.CloseRequested -= closeRequestedHandler;
closableViewModel.CloseRequested += closeRequestedHandler;
}
// Handles disposing resources.
var disposableViewModel = viewModel as IDisposable;
if (disposableViewModel != null)
{
window.Closed += (_, __) => disposableViewModel.Dispose();
}
// Shows the window.
if (isDialog)
{
window.ShowDialog();
}
else
{
window.Show();
}
}