show(delay?: number): void {
		this.showDelayedScheduler.cancel();

		if (typeof delay === 'number') {
			this.showDelayedScheduler.schedule(delay);
		} else {
			show(this.element);
		}
	}

//.........这里部分代码省略.........

			clearNode(this.buttonsContainer);

			let focusedButton = 0;
			this.buttonGroup = new ButtonGroup(this.buttonsContainer, this.buttons.length, { title: true });
			this.buttonGroup.buttons.forEach((button, index) => {
				button.label = mnemonicButtonLabel(this.buttons[index], true);

				this._register(button.onDidClick(e => {
					EventHelper.stop(e);
					resolve(index);
				}));
			});

			this._register(domEvent(window, 'keydown', true)((e: KeyboardEvent) => {
				const evt = new StandardKeyboardEvent(e);
				if (evt.equals(KeyCode.Enter) || evt.equals(KeyCode.Space)) {
					return;
				}

				let eventHandled = false;
				if (this.buttonGroup) {
					if (evt.equals(KeyMod.Shift | KeyCode.Tab) || evt.equals(KeyCode.LeftArrow)) {
						focusedButton = focusedButton + this.buttonGroup.buttons.length - 1;
						focusedButton = focusedButton % this.buttonGroup.buttons.length;
						this.buttonGroup.buttons[focusedButton].focus();
						eventHandled = true;
					} else if (evt.equals(KeyCode.Tab) || evt.equals(KeyCode.RightArrow)) {
						focusedButton++;
						focusedButton = focusedButton % this.buttonGroup.buttons.length;
						this.buttonGroup.buttons[focusedButton].focus();
						eventHandled = true;
					}
				}

				if (eventHandled) {
					EventHelper.stop(e, true);
				} else if (this.options.keyEventProcessor) {
					this.options.keyEventProcessor(evt);
				}
			}));

			this._register(domEvent(window, 'keyup', true)((e: KeyboardEvent) => {
				EventHelper.stop(e, true);
				const evt = new StandardKeyboardEvent(e);

				if (evt.equals(KeyCode.Escape)) {
					resolve(this.options.cancelId || 0);
				}
			}));

			this._register(domEvent(this.element, 'focusout', false)((e: FocusEvent) => {
				if (!!e.relatedTarget && !!this.element) {
					if (!isAncestor(e.relatedTarget as HTMLElement, this.element)) {
						this.focusToReturn = e.relatedTarget as HTMLElement;

						if (e.target) {
							(e.target as HTMLElement).focus();
							EventHelper.stop(e, true);
						}
					}
				}
			}));

			removeClasses(this.iconElement, 'icon-error', 'icon-warning', 'icon-info');

			switch (this.options.type) {
				case 'error':
					addClass(this.iconElement, 'icon-error');
					break;
				case 'warning':
					addClass(this.iconElement, 'icon-warning');
					break;
				case 'pending':
					addClass(this.iconElement, 'icon-pending');
					break;
				case 'none':
				case 'info':
				case 'question':
				default:
					addClass(this.iconElement, 'icon-info');
					break;
			}

			const actionBar = new ActionBar(this.toolbarContainer, {});

			const action = new Action('dialog.close', nls.localize('dialogClose', "Close Dialog"), 'dialog-close-action', true, () => {
				resolve(this.options.cancelId || 0);
				return Promise.resolve();
			});

			actionBar.push(action, { icon: true, label: false, });

			this.applyStyles();

			show(this.element);

			// Focus first element
			this.buttonGroup.buttons[focusedButton].focus();
		});

		this._register(this.showDelayedScheduler = new RunOnceScheduler(() => show(this.element), 0));