private static Window SetupExternalDialogWindow(BaseMetroDialog dialog)
{
MetroWindow win = new MetroWindow();
win.ShowInTaskbar = false;
win.ShowActivated = true;
win.Topmost = true;
win.ResizeMode = ResizeMode.NoResize;
win.WindowStyle = WindowStyle.None;
win.WindowStartupLocation = WindowStartupLocation.CenterScreen;
win.ShowTitleBar = false;
win.ShowCloseButton = false;
win.WindowTransitionsEnabled = false;
win.Background = dialog.Background;
try
{
win.GlowBrush = win.TryFindResource("AccentColorBrush") as SolidColorBrush;
}
catch (Exception) { }
win.Width = SystemParameters.PrimaryScreenWidth;
win.MinHeight = SystemParameters.PrimaryScreenHeight / 4.0;
win.SizeToContent = SizeToContent.Height;
GlowWindowBehavior glowWindow = new GlowWindowBehavior();
glowWindow.Attach(win);
dialog.ParentDialogWindow = win; //THIS IS ONLY, I REPEAT, ONLY SET FOR EXTERNAL DIALOGS!
win.Content = dialog;
EventHandler closedHandler = null;
closedHandler = (sender, args) =>
{
win.Closed -= closedHandler;
dialog.ParentDialogWindow = null;
win.Content = null;
};
win.Closed += closedHandler;
return win;
}
/// <summary>
/// Hides a visible Metro Dialog instance.
/// </summary>
/// <param name="window">The window with the dialog that is visible.</param>
/// <param name="dialog">The dialog instance to hide.</param>
/// <returns>A task representing the operation.</returns>
/// <exception cref="InvalidOperationException">
/// The <paramref name="dialog"/> is not visible in the window.
/// This happens if <see cref="ShowMetroDialogAsync"/> hasn't been called before.
/// </exception>
public static Task HideMetroDialogAsync(this MetroWindow window, BaseMetroDialog dialog)
{
window.Dispatcher.VerifyAccess();
if (!window.metroDialogContainer.Children.Contains(dialog))
throw new InvalidOperationException("The provided dialog is not visible in the specified window.");
window.SizeChanged -= dialog.SizeChangedHandler;
dialog.OnClose();
Task closingTask = (Task)window.Dispatcher.Invoke(new Func<Task>(() => dialog._WaitForCloseAsync()));
return closingTask.ContinueWith<Task>(a =>
{
if (DialogClosed != null)
{
window.Dispatcher.BeginInvoke(new Action(() => DialogClosed(window, new DialogStateChangedEventArgs()
{
})));
}
return (Task)window.Dispatcher.Invoke(new Func<Task>(() =>
{
window.metroDialogContainer.Children.Remove(dialog); //remove the dialog from the container
return window.HideOverlayAsync();
}));
}).Unwrap();
}
private static SizeChangedEventHandler SetupAndOpenDialog(MetroWindow window, BaseMetroDialog dialog)
{
dialog.SetValue(Panel.ZIndexProperty, (int)window.overlayBox.GetValue(Panel.ZIndexProperty) + 1);
dialog.MinHeight = window.ActualHeight / 4.0;
dialog.MaxHeight = window.ActualHeight;
SizeChangedEventHandler sizeHandler = null; //an event handler for auto resizing an open dialog.
sizeHandler = new SizeChangedEventHandler((sender, args) =>
{
dialog.MinHeight = window.ActualHeight / 4.0;
dialog.MaxHeight = window.ActualHeight;
});
window.SizeChanged += sizeHandler;
//window.overlayBox.Visibility = Visibility.Visible; //activate the overlay effect
window.metroDialogContainer.Children.Add(dialog); //add the dialog to the container
dialog.OnShown();
return sizeHandler;
}
/// <summary>
/// Adds a Metro Dialog instance to the specified window and makes it visible.
/// <para>Note that this method returns as soon as the dialog is loaded and won't wait on a call of <see cref="HideMetroDialogAsync"/>.</para>
/// <para>You can still close the resulting dialog with <see cref="HideMetroDialogAsync"/>.</para>
/// </summary>
/// <param name="window">The owning window of the dialog.</param>
/// <param name="dialog">The dialog instance itself.</param>
/// <returns>A task representing the operation.</returns>
/// <exception cref="InvalidOperationException">The <paramref name="dialog"/> is already visible in the window.</exception>
public static Task ShowMetroDialogAsync(this MetroWindow window, BaseMetroDialog dialog)
{
window.Dispatcher.VerifyAccess();
if (window.metroDialogContainer.Children.Contains(dialog))
throw new InvalidOperationException("The provided dialog is already visible in the specified window.");
return window.ShowOverlayAsync().ContinueWith(z =>
{
dialog.Dispatcher.Invoke(new Action(() =>
{
SizeChangedEventHandler sizeHandler = SetupAndOpenDialog(window, dialog);
dialog.SizeChangedHandler = sizeHandler;
}));
}).ContinueWith(y =>
((Task)dialog.Dispatcher.Invoke(new Func<Task>(() => dialog.WaitForLoadAsync().ContinueWith(x =>
{
dialog.OnShown();
if (DialogOpened != null)
{
DialogOpened(window, new DialogStateChangedEventArgs()
{
});
}
})))));
}
