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dart - 你如何在 Dart 中创建自定义的霓虹动画

转载 作者：行者123 更新时间：2023-12-04 21:36:24 25 4
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在 Polymer 中，您可以创建霓虹动画，就像他们已经构建的“淡入动画”一样。你会像这样实现 Polymer.NeonAnimationBehavior

<script>
  Polymer({
    is: 'fade-in-animation',
    behaviors: [
      Polymer.NeonAnimationBehavior
    ],
    configure: function(config) {
      var node = config.node;
      this._effect = new KeyframeEffect(node, [
        {'opacity': '0'},
        {'opacity': '1'}
      ], this.timingFromConfig(config));
      return this._effect;
    }
  });
</script>

我可以创建类似的东西，只提供配置函数，它返回一个 KeyframeEffect。我尝试在 Polymer Dart 1.0 中重现这个 
@HtmlImport('diagonal-left.html')
library wellington.elements.animation.diagonal_left;

import 'dart:html';

import 'package:web_components/web_components.dart';
import 'package:polymer/polymer.dart';

import 'package:polymer_elements/neon_animation_behavior.dart';

@CustomElement('diagonal-left')
class DiagonalLeft extends PolymerElement with NeonAnimationBehavior {
  KeyframeEffect _effect;

  configure(config) {
    var node = config.node;
    if (config.transformOrigin) {
      setPrefixedProperty(node, 'transformOrigin', config.transformOrigin);
    } else {
      setPrefixedProperty(node, 'transformOrigin', '0 75%');
    }
    _effect = new KeyframeEffect(node, [
      {'transform': 'none'},
      {'transform': 'translateX(-100%)'}
    ], timingFromConfig(config));

    return _effect;
  }

  DiagonalLeft.created() : super.created();
}

使用 HTMLImport 导入这个 
<script type="application/dart" src="diagonal_left.dart"></script>

我尝试导入它，并将其放入 animationConfig 
@property
Map get animationConfig =>  {
  'entry': [
  {
    'name': 'fade-in-animation',
    'node': this,
    'timing': {'delay': 500, 'duration': 1000}
  },
  {
    'name': 'scale-up-animation',
    'node': this,
    'timing': {'duration': 2000}
  }],
  'exit': [{
    'name': 'fade-out-animation',
    'node': this,
    'timing': {'delay': 500, 'duration': 1000}
  },
  {
    'name': 'slide-left-animation',
    'node': this,
    'timing': {'duration': 1000}
  },
  {
    'name': 'diagonal-left',
    'node': this
  }]
};

我得到的只是浏览器控制台中的一条消息说 
neon-animated-pages: diagonal-left not found!

我究竟做错了什么？换句话说，如何在 Polymer Dart 1.0 中创建用于霓虹动画的自定义动画？

更新:

我找到了无法找到我创建的自定义动画的原因。没想到没有人注意到我的错误。我正在使用 
@CustomElement('diagonal-left')

这是旧的 pre Polymer Dart 1.0 注册元素的方式。应该是

@PolymerRegister('diagonal-left')

现在它能够找到我的动画，但这只会在 Dartium 中给我另一个错误 
VM4374:1 ORIGINAL EXCEPTION: V8 Exception(anonymous function) @ VM4374:1
VM4374:1 ORIGINAL STACKTRACE:(anonymous function) @ VM4374:1
VM4374:1 #0      JsFunction._apply (dart:js:1490)
#1      JsFunction.apply (dart:js:1488)
#2      BrowserDomAdapter.setProperty (package:angular2/src/platform/browser/browser_adapter.dart:140:20)
#3      DomRenderer.setElementProperty (package:angular2/src/platform/dom/dom_renderer.dart:190:9)
#4      DebugDomRenderer.setElementProperty (package:angular2/src/core/debug/debug_renderer.dart:127:10)
#5      AppView.notifyOnBinding (package:angular2/src/core/linker/view.dart:211:23)
#6      AbstractChangeDetector.notifyDispatcher (package:angular2/src/core/change_detection/abstract_change_detector.dart:280:21)
#7      _WaterfrontView_0.detectChangesInRecordsInternal (package:wellington/views/waterfront_view/waterfront_view.template.dart:66:20)
#8      AbstractChangeDetector.detectChangesInRecords (package:angular2/src/core/change_detection/abstract_change_detector.dart:151:12)
#9      AbstractChangeDetector.runDetectChanges (package:angular2/src/core/change_detection/abstract_change_detector.dart:125:10)
#10     AbstractChangeDetector._detectChangesInViewChildren (package:angular2/src/core/change_detection/abstract_change_detector.dart:244:12)
#11     AbstractChangeDetector.runDetectChanges (package:angular2/src/core/change_detection/abstract_change_detector.dart:128:10)
#12     AbstractChangeDetector._detectChangesInViewChildren (package:angular2/src/core/change_detection/abstract_change_detector.dart:244:12)
#13     AbstractChangeDetector.runDetectChanges (package:angular2/src/core/change_detection/abstract_change_detector.dart:128:10)
#14     AbstractChangeDetector.detectChanges (package:angular2/src/core/change_detection/abstract_change_detector.dart:111:10)
#15     ChangeDetectorRef_.detectChanges (package:angular2/src/core/change_detection/change_detector_ref.dart:209:14)
#16     ApplicationRef_.tick.<anonymous closure> (package:angular2/src/core/application_ref.dart:512:63)
#17     List.forEach (dart:core-patch/growable_array.dart:258)
#18     ApplicationRef_.tick (package:angular2/src/core/application_ref.dart:512:32)
#19     ApplicationRef_.ApplicationRef_.<anonymous closure>.<anonymous closure> (package:angular2/src/core/application_ref.dart:410:16)
#20     _rootRun (dart:async/zone.dart:1150)
#21     _ZoneDelegate.run (dart:async/zone.dart:693)
#22     NgZoneImpl._run (package:angular2/src/core/zone/ng_zone_impl.dart:150:21)
#23     _CustomZone.run (dart:async/zone.dart:1026)
#24     _CustomZone.runGuarded (dart:async/zone.dart:924)
#25     NgZoneImpl.runInner (package:angular2/src/core/zone/ng_zone_impl.dart:121:23)
#26     NgZone.run (package:angular2/src/core/zone/ng_zone.dart:219:27)
#27     ApplicationRef_.ApplicationRef_.<anonymous closure> (package:angular2/src/core/application_ref.dart:409:20)
#28     _RootZone.runUnaryGuarded (dart:async/zone.dart:1338)
#29     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:331)
#30     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:258)
#31     _SyncBroadcastStreamController._sendData (dart:async/broadcast_stream_controller.dart:386)
#32     _BroadcastStreamController.add (dart:async/broadcast_stream_controller.dart:261)
#33     EventEmitter.emit (package:angular2/src/facade/async.dart:95:17)
#34     NgZone._checkStable (package:angular2/src/core/zone/ng_zone.dart:146:34)
#35     NgZone.NgZone.<anonymous closure> (package:angular2/src/core/zone/ng_zone.dart:129:16)
#36     NgZoneImpl._run (package:angular2/src/core/zone/ng_zone_impl.dart:152:14)
#37     NgZoneImpl._runUnary (package:angular2/src/core/zone/ng_zone_impl.dart:157:7)
#38     _CustomZone.runUnary (dart:async/zone.dart:1037)
#39     _CustomZone.runUnaryGuarded (dart:async/zone.dart:932)
#40     _CustomZone.bindUnaryCallback.<anonymous closure> (dart:async/zone.dart:961)
#41     _Timer._Timer.<anonymous closure> (dart:html:49206)

当运行时 pub serve我在 Chrome 中得到以下信息 
EXCEPTION: NoSuchMethodError: method not found: 'configure' (animation.configure is not a function) in [selected in WaterfrontView@7:40]  html_dart2js.dart:3351
EXCEPTION: NoSuchMethodError: method not found: 'configure' (animation.configure is not a function) in [selected in WaterfrontView@7:40]
ORIGINAL EXCEPTION: NoSuchMethodError: method not found: 'configure' (animation.configure is not a function)
ORIGINAL STACKTRACE:

TypeError: animation.configure is not a function
at HTMLElement._configureAnimationEffects (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:20326)
at HTMLElement.playAnimation (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:20362)
at HTMLElement._selectedChanged (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:20572)
at HTMLElement._complexObserverEffect (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:7749)
at HTMLElement._effectEffects (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:7496)
at HTMLElement._propertySetter (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:7473)
at HTMLElement.setter (index.html?_ijt=j7c5fphk4jffr92eaclvnf00al:7582)
at eval (eval at F (js_dart2js.dart:358), <anonymous>:1:39)
at h2.bt (js_dart2js.dart:387)
at h2.aC (js_dart2js.dart:392)
aE @ html_dart2js.dart:3351
(anonymous function) @ exception_handler.dart:80
dart.cI.$3 @ exception_handler.dart:91
dart.yu.$1 @ application_ref.dart:262
dart.xS.$0 @ ng_zone_impl.dart:157
dart.nY @ zone.dart:1150
dart.xN.fj @ zone.dart:693
dart.xN.lB @ ng_zone_impl.dart:157
(anonymous function) @ VM202:2
bP @ zone.dart:1037
bQ @ zone.dart:932
W @ stream_impl.dart:331
dart.ey.ay @ stream_impl.dart:258
W @ broadcast_stream_controller.dart:386
$1 @ broadcast_stream_controller.dart:261
dart.xN.lz @ ng_zone_impl.dart:190
(anonymous function) @ VM198:2
aq @ zone.dart:1005
ai @ zone.dart:926
dart.ug.$1 @ ng_zone_impl.dart:121
bQ @ zone.dart:1338
W @ stream_impl.dart:331
dart.ey.ay @ stream_impl.dart:258
W @ broadcast_stream_controller.dart:386
eH @ broadcast_stream_controller.dart:261
$0 @ ng_zone.dart:129
dart.xN.fj @ ng_zone_impl.dart:152
dart.xN.lB @ ng_zone_impl.dart:157
(anonymous function) @ VM202:2
bP @ zone.dart:1037
bQ @ zone.dart:932
dart.Ar.$1 @ zone.dart:961
dart.zF.$0 @ isolate_helper.dart:1396
$0 @ js_helper.dart:2408
bz @ isolate_helper.dart:462
d9 @ isolate_helper.dart:54
dart.HW @ js_helper.dart:2408
(anonymous function) @ js_helper.dart:2430

这告诉我 dart 方法 configure(config) 没有被转换/包装成 JS 函数。我可以做些什么来解决这个问题并使自定义 Dart 动画在 Polymer 中工作？是的，这是在 Angular 2 应用程序中运行的 Polymer，这意味着我不得不使用 shadowroot。

更新 2:

我在我使用的 Chrome 版本中遇到了一个错误，这与这个错误 https://github.com/Polymer/core-animation/pull/28 有关。 .我发现我需要更新到最新的polymer_elements 1.0.0-rc.9。现在我回到第一个错误是 
neon-animated-pages: diagonal-left not found!

哦，进步太多了。

最佳答案

我再次回答了我自己的问题。我可以开始工作的唯一方法是用 JS 编写动画，然后将其包装在 Polymer Dart 包装器中。最简单的方法是使用 custom_element_apigen .问题是，由于 pub 中的更改，它不适用于当前的 Dart 版本。有一个 pull request 可以解决这个问题，但同时你必须手动完成。我模仿的方式custom_element_apigen做事。

lib/src/test-animation/test-animation.html 中的 JavaScript 版本

<link rel="import" href="../../../../packages/polymer/polymer.html">
<link rel="import" href="../../../../packages/polymer_elements/src/neon-animation/neon-animation-behavior.html">
<link rel="import" href="../../../../packages/polymer_elements/src/neon-animation/web-animations.html">


<script>

    Polymer({

        is: 'test-animation',

        behaviors: [
            Polymer.NeonAnimationBehavior
        ],

        configure: function(config) {
            var node = config.node;

            node.style.perspective = "600px";
            node.style.backfaceVisibility = "hidden";
            node.style.transformStyle = "preserve-3d";
            node.style.transition = "transform 1s";
            node.style.position = "absolute";


            this._effect = new KeyframeEffect(node, [
                {'transform': 'rotateY(-20deg)'},
                {'transform': 'rotateY(-40deg)'},
                {'transform': 'rotateY(-60deg)'},
                {'transform': 'rotateY(-80deg)'},
                {'transform': 'rotateY(-100deg)'},
                {'transform': 'rotateY(-120deg)'},
                {'transform': 'rotateY(-140deg)'},
                {'transform': 'rotateY(-160deg)'},
                {'transform': 'rotateY(-180deg)'},
                {'transform': 'rotateY(0deg)'}
            ], this.timingFromConfig(config));

            return this._effect;
        }

    });

</script>

创建一个 nodart html 文件 lib/test_animation_nodart.html 
<link rel="import" href="src/test-animation/test-animation.html">
<link rel="import" href="../../packages/polymer_elements/neon_animation_behavior_nodart.html">

创建 dart 聚合物 html 包装器 lib/test_animation.html。你实际上不需要这个文件，但是 custom_element_apigen创建它，所以我把它留在里面。 
<link rel="import" href="test_animation_nodart.html">

<script type="application/dart" src="test_animation.dart"></script>

最后是 dart 包装器 lib test_animation.dart 
@HtmlImport('test_animation_nodart.html')
library family_tree.lib.src.test_animation.test_animation;

import 'dart:html';
import 'package:web_components/web_components.dart';
import 'package:polymer_interop/polymer_interop.dart';
import 'package:polymer_elements/neon_animation_behavior.dart';


@CustomElementProxy('test-animation')
class TestAnimation extends HtmlElement with CustomElementProxyMixin, PolymerBase, NeonAnimationBehavior {
  TestAnimation.created() : super.created();
}

您现在应该能够将其包含在您的霓虹动画元素中的 animationConfig 字段中。见 this answer关于如何做到这一点。

这不是我希望的答案，但它有效。

关于dart - 你如何在 Dart 中创建自定义的霓虹动画，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36532508/

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