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POHow do you open a file chooser in a chrome packaged app with Dart
 

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  1. POHow do you open a file chooser in a chrome packaged app with Dart
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    <p>There don't appear to be any dart packages for this, so I'm using Javascript interop. This is what I've got so far:</p> <pre class="lang-dart prettyprint-override"><code> js.scoped(() { done(entry) { print('ok'); } js.context.doneCallback = new js.Callback.once(done); js.context.chrome.fileSystem.chooseEntry(null, js.context.doneCallback); }); </code></pre> <p>It's failing with:</p> <blockquote> <p>Uncaught Error: Invocation of form fileSystem.chooseEntry(object, object) doesn't match definition fileSystem.chooseEntry(optional object options, function callback)</p> </blockquote> <p>So it seems the callback is being rejected because it's the wrong type.</p> <p>Any ideas?</p> <p><a href="http://developer.chrome.com/apps/fileSystem.html" rel="nofollow">chrome.fileSystem docs</a> Edit: Changed optional param back to null (I also tried Damien's suggestion below).</p> <p>Edit: this code works now - thanks Damien!</p> <pre class="lang-dart prettyprint-override"><code> js.scoped(() { done(entry) { print('ok'); } js.context.chrome.fileSystem.chooseEntry(null, new js.Callback.once(done)); }); </code></pre> <p>Edit2: <a href="https://gist.github.com/xxgreg/5428315" rel="nofollow">Updated code</a> which opens a file chooser and reads the path from it. However I'm not sure how to use a javascript FileReader object via js_interop.</p> <p>Edit3: See <a href="https://groups.google.com/a/dartlang.org/d/msg/misc/D5hb02teYCU/ZbFLwqnESvYJ" rel="nofollow">discussion</a> on the Dart mailing list.</p>
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