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Object.watch() Dart equivalent
The observe package might do what you want. See also for an example Functionality in parent class needs to detect changes to child class properties Implement an Observer pattern in Dart How to use Dart ChangeNotifier class? How to replace deprectaed notifyProperty? Dart: Using observale with multiple getters/setter Observe package from polymer dart

Categories : Dart

How to set element positions with dart_web_toolkit?
I just looked a bit thought the code of https://github.com/akserg/dart_web_toolkit/blob/afac7aac09e3bcd9d3e1f926815eb85040e46e07/lib/src/ui/button_base.dart and it seems you should get the Element instance by calling b1.getElement() which should allow to access all elements properties like b1.getElement().style ..position = 'absolute' ..top = '10px' ..left = '25px'; not tested though.

Categories : Dart

dart reflection call by String
instead of if (d.toString().startsWith("MethodMirror on ")) { you can use if (d is MethodMirror) { You need an InstanceMirror of an instance of the class. I think in your case this would be var im = reflect(this).invoke(d.simpleName, []); im.declarations.forEach((d) ... see also How can I use Reflection (Mirrors) to access the method names in a Dart Class?

Categories : Dart

Dart Language: how to convert a String into a Transferable (ByteBuffer)
import 'dart:convert'; var list = Utf8.encode('xxx'); var data = list is Uint8List ? list.buffer : new Uint8List.fromList(list).buffer; to send the data using window.PostMessage use window.postMessage({'data': data}, '*', [data]); and read it on the receiver side like var string = Utf8.decode(message.data['data']); See also http://dartbug.com/19968 for the status of transferrables. The re

Categories : Dart

How to reference a polymer component from inside an Angular.Dart component
Thank you Ozan. That was a good suggestion, here is how I fixed it: Make sure you add useShadowDom: true to the component properties. The Angular component class implements shadowRootAware override onShadowRoot with the @override meta. My example class: @Component(selector: 'ang-comp', templateUrl:'ang_comp.html', useShadowRoot: true) class AngularComp implements ShadowRootAware {

Categories : Dart

How to use ScriptProcessorNode
In the mean time (i.e. assuming that soon you could use directly _script.onAudioProcess) you can use the following stub // stub as onAudioProcess has disappeared from sdk 1.7 Stream<AudioProcessingEvent> onAudioProcess(ScriptProcessorNode node) { return node.on['audioprocess']; } and use it like this onAudioProcess(_script).listen((AudioProcessingEvent event) { // example to get o

Categories : Dart

How do I do the equivalent of setTimeout + clearTimeout in Dart?
You can use the Timer class var timer = new Timer(new Duration(seconds: 1), () => print('done')); timer.cancel();

Categories : Dart

why abstract class instantiation isn't runtime error in dart?
It appears that the answer is factory constructor in abstract class: abstract class Foo { factory Foo() { // make Foo appear to be instantiable return new Bar(); } some(); // some abstract method Foo.name() {} just a named constructor } class Bar extends Foo { Bar():super.name(); // call named super constructor some() {} // implement abstract method } main() { print(new Foo()

Categories : Dart

DART: Run pub build on library fails with "[65] There are no source directories present"
You don't need to run pub build to be able to use a library. You need pub build to generate JavaScript from Dart for a browser application. Your question doesn't contain much information about your package directory layout or contents of your files but - the file containing main() needs to be in one of the directories listed in the error message - the file containing main() needs an import state

Categories : Dart

Dart editor "source not available"
I think this is because debugging is not yet supposed to work for Dart AppEngine applications. The related bug should be fixed but the used google/dart-runtime Docker images is still Dart 1.7.2 which doesn't contain the fix. See also How can I debug a Dart AppEngine app http://dartbug.com/21067 https://groups.google.com/a/dartlang.org/forum/#!topic/cloud/OK1nJtg7AjQ

Categories : Dart

How to prevent core-activate event in core-list when item's paper-icon-button is clicked
I remember having some ugly hacks where I was saving a flag for a given duration when the user was pressing a button in a list item. But the last time I checked (core_elements 0.4), handling click on the list itself (CoreList) was working (i.e. not on the item). Pseudo code below where I check the target item pressed by id (in my case it is a PaperIconButton but that is not relevant). I get the co

Categories : Dart

Polymer Dart core-style ref not resolved
Update I think the problem is your noscript in your test-cell element. Binding doesn't work in Dart with Polymer elements without a backing script (noscript) as far as I know. I think in your case the <test-cell> element needs a field @observable var s; to make this work. Original Your code doesn't show if you ever assign a value to s. I doubt toObservable works on plain Dart objec

Categories : Dart

Anonymous callback function to JsObject doesn't update Dart Controller until after a user action
I think you need to call scope.apply(). I think Angular just can't recognize the value change in hideDiv when doit() is called from another zone (like JS). You usually don't need to call scope.apply() in Angular.dart but I think this is one of the exceptions. Is the animate function the only reason you use jQuery? It might be easier to do this with Angular.darts animation features.

Categories : Dart

correct way of inserting external referenced template in polymer dart?
Instead of using elementElement, we should use element.templateContent: @CustomTag('data-ul') class DataUl extends LiElement with Polymer, Observable { DataUl.created() : super.created(); @published List items; void parseDeclaration(Element elementElement) { // We need to remove previous template from element.templateContent // in that way it no continues adding a new content ever

Categories : Dart

disposing StreamController when polymer element is destroyed
You can use the attached/detached callbacks. See also https://www.polymer-project.org/docs/polymer/polymer.html#lifecyclemethods

Categories : Dart

Binding a simple list in dart web components won't work
There is no iterate in Polymer and the {{}} are missing. <option template iterate="item in intls">{{item}}</option> should be <template repeat="{{item in intls}}" <option >{{item}}</option> </template> There are a few elements (for example <tr>) which don't allow other elements like <template> inside them on some browsers. A supported workarou

Categories : Dart

In AngularDart, how should I reference my templates in templateUrl so they work for both Dartium and dart2js?
but then Dartium tries to load that as /packages/project/templates/app.html, and not /project/packages/project/templates/app.html, which would be correct. I don't see any way to tell it what the base URL is. I believe you are using angulardart 1.1.1 or 1.1.2? We had the same issue in our project after switching from 1.1.0 to 1.1.2. This is weird behaviour that was added since version 1.

Categories : Dart

Pub warnings while trying to run bwu_datagrid 0.0.18 and polymer+angular
Add a specific version constraint to you pubspec.yaml. dependencies: polymer: '>=0.15.1 <0.16.0' This might lead to follow up errors. Continue accordingly for similar errors. As last resort you can add dependency overrides to force a package no matter if it fulfills the constraints defined in the other imported packages (use at your own risk though). dependency_overrides: some_pac

Categories : Dart

How to implement a logging system in dart
I think this is the simplest way to set it up import 'package:logging/logging.dart' show Logger, Level; // every library import 'package:quiver_log/log.dart'; // library containing main final _log = new Logger('bwu_model.server.main'); // every library // main void main() { Logger.root.level = Level.FINEST; var appender = new PrintAppender(BASIC_LOG_FORMATTER); appender.attachLogger(Log

Categories : Dart


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Object.watch() Dart equivalent
How to set element positions with dart_web_toolkit?
dart reflection call by String
Dart Language: how to convert a String into a Transferable (ByteBuffer)
How to reference a polymer component from inside an Angular.Dart component
How to use ScriptProcessorNode
How do I do the equivalent of setTimeout + clearTimeout in Dart?
why abstract class instantiation isn't runtime error in dart?
DART: Run pub build on library fails with "[65] There are no source directories present"
Dart editor "source not available"
How to prevent core-activate event in core-list when item's paper-icon-button is clicked
Polymer Dart core-style ref not resolved
Anonymous callback function to JsObject doesn't update Dart Controller until after a user action
correct way of inserting external referenced template in polymer dart?
disposing StreamController when polymer element is destroyed
Binding a simple list in dart web components won't work
In AngularDart, how should I reference my templates in templateUrl so they work for both Dartium and dart2js?
Pub warnings while trying to run bwu_datagrid 0.0.18 and polymer+angular
How to implement a logging system in dart
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