/// <summary>
/// Hides a visible dialog.
/// </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="ShowDialogAsync" /> hasn't been called before.
/// </exception>
public static Task HideDialogAsync(this CushWindow window, DialogBase dialog)
{
window.Dispatcher.VerifyAccess();
var foundDialog = false;
var contentDialog = dialog as ContentDialog;
if (contentDialog != null)
{
var dialog2 = contentDialog;
foreach (ContentDialog item in window.DialogContainer.Children)
{
if (item.Guid != dialog2.Guid) continue;
foundDialog = true;
dialog = item;
break;
}
}
else
{
foundDialog = window.DialogContainer.Children.Contains(dialog);
}
if (!foundDialog)
throw new InvalidOperationException("The provided dialog is not visible in the specified window.");
window.SizeChanged -= dialog.SizeChangedHandler;
dialog.OnClose();
var closingTask = window.Dispatcher.Invoke(() => dialog.WaitForCloseAsync());
return closingTask.ContinueWith(a =>
{
if (DialogClosed != null)
{
window.Dispatcher.BeginInvoke(
new Action(() => DialogClosed(window, new DialogStateChangedEventArgs())));
}
return window.Dispatcher.Invoke(() =>
{
window.DialogContainer.Children.Remove(dialog); //remove the dialog from the container
ColorSchemeManager.Release(dialog);
return window.HideOverlayAsync();
});
}).Unwrap();
}
private static SizeChangedEventHandler SetupAndOpenDialog(CushWindow window, DialogBase dialog)
{
dialog.SetValue(Panel.ZIndexProperty, (int) window.OverlayBox.GetValue(Panel.ZIndexProperty) + 1);
dialog.MinHeight = window.ActualHeight/4.0;
dialog.MaxHeight = window.ActualHeight;
//an event handler for auto resizing an open dialog.
SizeChangedEventHandler sizeHandler = (sender, args) =>
{
dialog.MinHeight = window.ActualHeight/4.0;
dialog.MaxHeight = window.ActualHeight;
};
window.SizeChanged += sizeHandler;
if (!window.DialogContainer.Children.Contains(dialog))
{
window.DialogContainer.Children.Add(dialog); //add the dialog to the container
}
dialog.OnShown();
return sizeHandler;
}