public DialogWindowView(DialogViewModel dialogViewModel, Window window)
{
if (window == null || window.DataContext != dialogViewModel)
{
return;
}
DialogWindow = window;
WindowViewModel = dialogViewModel;
IsValid = true;
}
public DialogUserControlView(DialogViewModel dialogViewModel, UserControl userControl)
{
if (userControl == null || dialogViewModel == null)
{
return;
}
if (userControl.DataContext != dialogViewModel)
{
userControl.DataContext = dialogViewModel;
}
BaseDialogWindowView = new DialogBaseWindow(userControl, dialogViewModel);
UserControlView = userControl;
BaseDialogWindowViewModel = dialogViewModel;
IsValid = true;
}
public DialogBaseWindow(UserControl userControl, DialogViewModel dialogViewModel)
{
try
{
pDialogViewModel = dialogViewModel;
this.DataContext = dialogViewModel;
InitializeComponent();
try
{
// These are some conditions that are needed for everything to work correctly.
if (userControl == null || userControl.DataContext != dialogViewModel)
{
// NOTE: This will cause the following suppressed error that only shows in debugger output:
// 'System.InvalidOperationException' in PresentationFramework.dll
// This happens since the window is already closed before a Show() or ShowDialog() method can actually do anything.
this.Close();
return;
}
}
catch (Exception Ex)
{
LogMVVM.Exception("MVVM Exception: Dialog Window user control and data context check error.", Ex);
}
try
{
if (dialogViewModel.Data.WindowIconURI.Length > 0)
{
Icon = BitmapFrame.Create(new Uri(dialogViewModel.Data.WindowIconURI, UriKind.RelativeOrAbsolute));
}
}
catch (Exception Ex)
{
LogMVVM.Exception("MVVM Exception: Dialog Window title bar icon creation error.", Ex);
}
// General Window properties. Not bound since some are not technically content and one is not able to be bound.
WindowStartupLocation = dialogViewModel.Data.DialogStartupLocation; // Cannot be bound since it is a DependencyProperty
WindowStyle = dialogViewModel.Data.DialogWindowStyle;
Topmost = dialogViewModel.Data.Topmost;
Title = dialogViewModel.Data.WindowTitle;
Background = dialogViewModel.Data.Background;
// Adds the user control to the window.
this.dialogBaseWindowGrid.Children.Add(userControl);
// If there is a specified control to focus, this will process that.
FocusElementControl(dialogViewModel.Data.FocusUIElement);
Loaded += contentLoaded;
ContentRendered += contentRendered;
Closing += windowClosing;
dialogViewModel.Events.CloseDialogHandler += closeDialog;
dialogViewModel.Events.SendMessageHandler += openWindowMessage;
}
catch (Exception Ex)
{
MessageBox.Show(this, "Window load error: " + Environment.NewLine + Convert.ToString(Ex), "Error...", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
// Primary method for opening a dialog.
private static WindowMessageResult openDialogWork(Window dialogWindow, DialogViewModel dialogWindowViewModel, Window parentWindow, ShutdownMode shutdownMode)
{
bool applicationUIThreadAccess = CheckApplicationUIThreadAccess();
if (applicationUIThreadAccess && shutdownMode != CurrentApplicationShutdownMode())
{
// Param shutdownMode can used to prevent the Application.Current from going null. It can be turned off by setting ApplicationExplicitShutdown.
// This should not throw. Possible investigation should be made to check on this.
Application.Current.ShutdownMode = shutdownMode;
}
// We need to find a dispatcher to display this message.
Dispatcher dispatcher = null;
if (parentWindow == null && applicationUIThreadAccess == false)
{
return(WindowMessageResult.Undefined);
}
else if (parentWindow == null && applicationUIThreadAccess)
{
try
{
dialogWindow.Owner = Application.Current.Windows.OfType <Window>().FirstOrDefault(x => x.IsActive);
}
catch (Exception Ex)
{
LogMVVM.Exception("MVVM Exception: Dialog Service error when trying to get window owner.", Ex);
// This should not throw. Possible investigation should be made to check on this.
if (Application.Current.Windows.Count > 0)
{
dialogWindow.Owner = Application.Current.Windows[0];
}
else
{
dialogWindow.Owner = null;
}
}
if (dialogWindow.Owner == null)
{
dispatcher = Application.Current.Dispatcher;
}
else
{
dispatcher = dialogWindow.Owner.Dispatcher;
}
}
else // This should ONLY happen if parentWindow is NOT null.
{
dialogWindow.Owner = parentWindow;
dispatcher = parentWindow.Dispatcher;
}
try
{
if (dispatcher.CheckAccess() == false)
{
return(WindowMessageResult.Undefined);
}
WindowMessageResult result = WindowMessageResult.Undefined;
dispatcher.Invoke((Action) delegate
{
dialogWindow.ShowDialog();
result = dialogWindowViewModel.Result;
});
return(result);
}
catch (Exception Ex)
{
LogMVVM.Exception("MVVM Exception: Dialog service error when opening dialog window.", Ex);
return(WindowMessageResult.Undefined);
}
}
