/// <summary> /// Adds a Crystal Dialog instance to the specified window and makes it visible asynchronously. /// If you want to wait until the user has closed the dialog, use <see cref="CrystalDialogBase.WaitUntilUnloadedAsync"/> /// <para>You have to close the resulting dialog yourself with <see cref="HideCrystalDialogAsync"/>.</para> /// </summary> /// <param name="window">The owning window of the dialog.</param> /// <param name="dialog">The dialog instance itself.</param> /// <param name="settings">An optional pre-defined settings instance.</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 ShowCrystalDialogAsync(this CrystalWindow window, CrystalDialogBase dialog, CrystalDialogSettings?settings = null) { if (window is null) { throw new ArgumentNullException(nameof(window)); } window.Dispatcher.VerifyAccess(); if (dialog is null) { throw new ArgumentNullException(nameof(dialog)); } if (window.crystalActiveDialogContainer is null) { throw new InvalidOperationException("Active dialog container could not be found."); } if (window.crystalInactiveDialogContainer is null) { throw new InvalidOperationException("Inactive dialog container could not be found."); } if (window.crystalActiveDialogContainer.Children.Contains(dialog) || window.crystalInactiveDialogContainer.Children.Contains(dialog)) { throw new InvalidOperationException("The provided dialog is already visible in the specified window."); } settings ??= (dialog.DialogSettings ?? window.CrystalDialogOptions); return(HandleOverlayOnShow(settings, window).ContinueWith(z => { return window.Dispatcher.Invoke(new Func <Task>(() => { SetDialogFontSizes(settings, dialog); SizeChangedEventHandler sizeHandler = SetupAndOpenDialog(window, dialog); dialog.SizeChangedHandler = sizeHandler; return dialog.WaitForLoadAsync().ContinueWith(x => { dialog.OnShown(); if (DialogOpened != null) { window.Dispatcher.BeginInvoke(new Action(() => DialogOpened(window, new DialogStateChangedEventArgs()))); } }); })); }).Unwrap()); }
private static SizeChangedEventHandler SetupAndOpenDialog(CrystalWindow window, CrystalDialogBase dialog) { dialog.SetValue(Panel.ZIndexProperty, (int)(window.overlayBox?.GetValue(Panel.ZIndexProperty) ?? 0) + 1); var fixedMinHeight = dialog.MinHeight > 0; var fixedMaxHeight = dialog.MaxHeight is not double.PositiveInfinity && dialog.MaxHeight > 0; void CalculateMinAndMaxHeight() { if (!fixedMinHeight) { dialog.SetCurrentValue(FrameworkElement.MinHeightProperty, window.ActualHeight / 4.0); } if (!fixedMaxHeight) { dialog.SetCurrentValue(FrameworkElement.MaxHeightProperty, window.ActualHeight); } else { dialog.SetCurrentValue(FrameworkElement.MinHeightProperty, Math.Min(dialog.MinHeight, dialog.MaxHeight)); } } CalculateMinAndMaxHeight(); void OnWindowSizeChanged(object sender, SizeChangedEventArgs args) { CalculateMinAndMaxHeight(); } window.SizeChanged += OnWindowSizeChanged; window.AddDialog(dialog); dialog.OnShown(); return(OnWindowSizeChanged); }