mirror of
https://github.com/dart-lang/sdk
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4004194c29
Remove redundant super calls and move all other super calls to the end of the initializer list, as required by Dart 2. Change-Id: I2b0968b9c6508d00a3379c225470d5d9c0ec9f78 Reviewed-on: https://dart-review.googlesource.com/69967 Reviewed-by: Stephen Adams <sra@google.com> Commit-Queue: Stephen Adams <sra@google.com>
90 lines
2.6 KiB
Dart
90 lines
2.6 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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part of swarmlib;
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/**
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* A simple news reader in Dart.
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*/
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class Swarm extends App {
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/**
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* Flag to insure the onLoad isn't called when callback from initializeFromUrl
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* could occur before the document's onload event.
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*/
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bool onLoadFired;
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/** Collections of datafeeds to show per page. */
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Sections sections;
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/** The front page of the app. */
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FrontView frontView;
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/** Observable UI state. */
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SwarmState state;
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Swarm({bool useCannedData: false}) : onLoadFired = false {
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Sections.initializeFromUrl(useCannedData, (currSections) {
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sections = currSections;
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state = new SwarmState(sections);
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setupApp();
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});
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// Catch user keypresses and decide whether to use them for the
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// Streams app or pass them on to the browser.
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document.onKeyUp.listen((e) {
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if (frontView != null) {
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frontView.processKeyEvent(e);
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}
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});
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}
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/**
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* Tells each data source to check the server for the latest data.
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*/
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void refresh() {
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sections.refresh();
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// Hook up listeners about any data source additions or deletions. We don't
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// differentiate additions or deletions just the fact that data feeds have
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// changed. We might want more fidelity later.
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sections.sectionTitles.forEach((title) {
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Section section = sections.findSection(title);
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// TODO(terry): addChangeListener needs to return an id so previous
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// listener can be removed, otherwise anonymous functions
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// can't easily be used. See b/5063673
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section.feeds.addChangeListener((data) {
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// TODO(jacobr): implement this.
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print("Refresh sections not impl yet.");
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});
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});
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}
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/** The page load event handler. */
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void onLoad() {
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onLoadFired = true;
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super.onLoad();
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setupApp();
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}
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/**
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* Setup the application's world.
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*/
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void setupApp() {
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// TODO(terry): Should be able to spinup the app w/o waiting for data.
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// If the document is already loaded so we can setup the app anytime.
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// Otherwise, we'll wait to setup the world until the document is ready
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// to render.
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if (onLoadFired && state != null) {
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render();
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// This call loads the initial data.
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refresh();
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eraseSplashScreen();
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}
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}
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void render() {
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frontView = new FrontView(this);
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frontView.addToDocument(document.body);
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}
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}
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