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hanzi-writer-context.js
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hanzi-writer-context.js
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import HanziWriter from 'hanzi-writer';
import RenderTarget from './RenderTarget';
import { removeEmptyKeys } from './utils';
import defaultCharDataLoader from './defaultCharDataLoader';
export default class HanziWriterContext {
constructor({
id,
page,
charDataLoader,
character,
onLoadCharDataError,
onLoadCharDataSuccess,
showOutline,
showCharacter,
// positioning options
padding,
// animation options
strokeAnimationSpeed,
strokeFadeDuration,
strokeHighlightDuration,
strokeHighlightSpeed,
delayBetweenStrokes,
delayBetweenLoops,
// colors
strokeColor,
radicalColor,
highlightColor,
outlineColor,
drawingColor,
// quiz options
leniency,
showHintAfterMisses,
highlightOnComplete,
highlightCompleteColor,
}) {
if (!id || !page) {
throw new Error('parameter id, page are required');
}
this.comp = page.selectComponent('#' + id);
if (!this.comp) {
throw new Error(`hanzi-writer-view with id ${id} not found`);
}
this.isDestroyed = false;
this.writer = new HanziWriter(this.comp, removeEmptyKeys({
width: this.comp.data.width,
height: this.comp.data.height,
charDataLoader: charDataLoader || defaultCharDataLoader,
onLoadCharDataError,
onLoadCharDataSuccess,
showOutline,
showCharacter,
padding,
strokeAnimationSpeed,
strokeFadeDuration,
strokeHighlightDuration,
strokeHighlightSpeed,
delayBetweenStrokes,
delayBetweenLoops,
strokeColor,
radicalColor,
highlightColor,
outlineColor,
drawingColor,
leniency,
showHintAfterMisses,
highlightOnComplete,
highlightCompleteColor,
rendererOverride: { createRenderTarget: RenderTarget.init },
renderer: 'canvas',
}));
if (character) {
this.setCharacter(character);
}
this.comp.connectContext(this);
}
_ensureNotDestroyed() {
if (this.isDestroyed) throw new Error('This context has already been destroyed');
}
showCharacter(options = {}) {
this._ensureNotDestroyed();
return this.writer.showCharacter(options);
}
hideCharacter(options = {}) {
this._ensureNotDestroyed();
return this.writer.hideCharacter(options);
}
animateCharacter(options = {}) {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(false);
return this.writer.animateCharacter(options);
}
animateStroke(strokeNum, options = {}) {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(false);
return this.writer.animateStroke(strokeNum, options);
}
loopCharacterAnimation(options = {}) {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(false);
return this.writer.loopCharacterAnimation(options);
}
showOutline(options = {}) {
this._ensureNotDestroyed();
return this.writer.showOutline(options);
}
hideOutline(options = {}) {
this._ensureNotDestroyed();
return this.writer.hideOutline(options);
}
updateColor(colorName, colorVal, options = {}) {
this._ensureNotDestroyed();
return this.writer.updateColor(colorName, colorVal, options);
}
quiz(quizOptions = {}) {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(true);
return this.writer.quiz(quizOptions);
}
cancelQuiz() {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(false);
return this.writer.cancelQuiz();
}
setCharacter(character) {
this._ensureNotDestroyed();
this.comp.setIsQuizzing(false);
return this.writer.setCharacter(character);
}
trigger(evtName, evt) {
this.writer.target.trigger(evtName, evt);
}
destroy() {
if (this.isDestroyed) return;
this.comp.disconnectContext();
this.writer.target.removeAllListeners();
this.writer.cancelQuiz();
this.writer.hideCharacter();
this.writer.hideOutline();
this.isDestroyed = true;
}
}