43 lines
765 B
JavaScript
43 lines
765 B
JavaScript
import {compose} from '@avocado/core';
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import {simpleState, Trait} from '../trait';
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const decorate = compose(
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simpleState('x', {
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track: true,
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}),
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simpleState('y', {
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track: true,
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}),
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);
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class PositionedBase extends Trait {
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static defaultState() {
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return {
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x: 0,
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y: 0,
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};
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}
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get position() {
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return [
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this.state.get('x'),
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this.state.get('y'),
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];
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}
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set position([x, y]) {
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const positionChanged = x !== entity.x || y !== entity.y;
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const lastPosition = entity.position;
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this.entity.x = x;
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this.entity.y = y;
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if (positionChanged) {
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this.entity.emit('positionChanged', entity.position, lastPosition);
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}
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}
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}
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export class Positioned extends decorate(PositionedBase) {}
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