How do you create a custom neon animation in Dart - dart

Question

In Polymer you can create neon-animations like their already built 'fade-in-animation'. You would implement the Polymer.NeonAnimationBehavior like this
<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>
I could create something similar to that and just provide the configure function, which returns a KeyframeEffect. I tried reproducing this in Polymer Dart 1.0
#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();
}
with the HTMLImport importing this
<script type="application/dart" src="diagonal_left.dart"></script>
I try importing this, and putting this in the 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
}]
};
and all I get is a message in the browser console saying
neon-animated-pages: diagonal-left not found!
What am I doing wrong? In other words, how can I create a custom animation for use in neon-animations in Polymer Dart 1.0?
UPDATE:
I've found the reason it was failing to find the custom animation I had created. Surprised no one noticed my mistake. I was using
#CustomElement('diagonal-left')
which is the old pre Polymer Dart 1.0 way of registering an element. It should be instead
#PolymerRegister('diagonal-left')
Now it's able to find my animation, but that only gave me another error in Dartium
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)
and when run through pub serve I get the following in Chrome
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
Which is telling me the dart method configure(config) is not being converted/wrapped into a JS function. Is there something I can do to fix this and get a custom dart animation to work in Polymer? And yes this is Polymer being run in a Angular 2 app, which means I am forced to use shadowroot.
UPDATE 2:
I encountered an error in the version of Chrome I was using, which relates to this bug https://github.com/Polymer/core-animation/pull/28. I found I needed to update to the latest polymer_elements 1.0.0-rc.9. Now I'm back to square one with the error being
neon-animated-pages: diagonal-left not found!
Oh well so much for progress.

Answer 1

I have yet again answered my own question. The only method I can get to work is to write the animation in JS, and then wrap it in a Polymer Dart wrapper. The easiest way is to use the custom_element_apigen. The problem is that's not working with the current Dart version, due to changes in pub. There is a pull request that answers that problem, but in the meantime you'll have to do it manually. I mimic the way custom_element_apigen does things.
JavaScript version in lib/src/test-animation/test-animation.html
<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>
Create a nodart html file 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">
Create the dart polymer html wrapper lib/test_animation.html. You actually don't need this file, but custom_element_apigen creates it, so I leave it in.
<link rel="import" href="test_animation_nodart.html">
<script type="application/dart" src="test_animation.dart"></script>
And then finally the dart wrapper 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();
}
You should now be able to include this in your neon animation element, in the animationConfig field. See this answer on how to do this.
This isn't the answer I was hoping for, but it works.