SAP UI5 里的 Busy Dialog 控件使用概述

<mvc:View
	controllerName="sap.m.sample.BusyDialog.C"
	xmlns="sap.m"
	xmlns:l="sap.ui.layout"
	xmlns:mvc="sap.ui.core.mvc">
	<l:VerticalLayout class="sapUiContentPadding" width="100%">
		<Button
			text="Show Busy Dialog"
			press="onOpenDialog"
			class="sapUiSmallMarginBottom"
			ariaHasPopup="Dialog" />
	</l:VerticalLayout>
</mvc:View>

<core:FragmentDefinition
	xmlns="sap.m"
	xmlns:core="sap.ui.core">
	<BusyDialog
		title="Loading Data"
		text="... now loading the data from a far away server"
		showCancelButton="true"
		close="onDialogClosed" />
</core:FragmentDefinition>

sap.ui.define([
	"sap/ui/core/mvc/Controller",
	"sap/ui/core/Fragment",
	"sap/ui/core/syncStyleClass",
	"sap/m/MessageToast"
], function (Controller, Fragment, syncStyleClass, MessageToast) {
	"use strict";

	var iTimeoutId;

	return Controller.extend("sap.m.sample.BusyDialog.C", {

		onOpenDialog: function () {
			// load BusyDialog fragment asynchronously
			if (!this._pBusyDialog) {
				this._pBusyDialog = Fragment.load({
					name: "sap.m.sample.BusyDialog.BusyDialog",
					controller: this
				}).then(function (oBusyDialog) {
					this.getView().addDependent(oBusyDialog);
					syncStyleClass("sapUiSizeCompact", this.getView(), oBusyDialog);
					return oBusyDialog;
				}.bind(this));
			}

			this._pBusyDialog.then(function(oBusyDialog) {
				oBusyDialog.open();
				this.simulateServerRequest();
			}.bind(this));
		},

		simulateServerRequest: function () {
			// simulate a longer running operation
			iTimeoutId = setTimeout(function() {
				this._pBusyDialog.then(function(oBusyDialog) {
					oBusyDialog.close();
				});
			}.bind(this), 3000);
		},

		onDialogClosed: function (oEvent) {
			clearTimeout(iTimeoutId);

			if (oEvent.getParameter("cancelPressed")) {
				MessageToast.show("The operation has been cancelled");
			} else {
				MessageToast.show("The operation has been completed");
			}
		}

	});
});