9f228349e9
Using ImageResource solves two problems: 1) Listeners can be notified synchronously when the sky.Image is already available. This change removes flash of 0x0 layout when moving an already-cached image around in the render tree. 2) In the future, when we support animated images, we can notify listeners multiple times whenever a new image is available.
26 lines
692 B
Dart
26 lines
692 B
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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part of sprites;
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class ImageMap {
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ImageMap(AssetBundle bundle) : _bundle = bundle;
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final AssetBundle _bundle;
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final Map<String, Image> _images = new Map<String, Image>();
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Future<List<Image>> load(List<String> urls) {
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return Future.wait(urls.map(_loadImage));
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}
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Future<Image> _loadImage(String url) async {
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Image image = await _bundle.loadImage(url).first;
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_images[url] = image;
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return image;
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}
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Image getImage(String url) => _images[url];
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Image operator [](String url) => _images[url];
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}
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