62 lines
959 B
JavaScript
62 lines
959 B
JavaScript
export default class WxCanvas {
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constructor(ctx, canvasId, isNew, canvasNode) {
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this.ctx = ctx
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this.canvasId = canvasId
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this.chart = null
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this.isNew = isNew
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if (isNew) {
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this.canvasNode = canvasNode
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}
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this.chart = null
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this._init()
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}
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getContext(contextType) {
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return this.ctx
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}
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setChart(chart) {
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this.chart = chart
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}
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addEventListener() {
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// 暂不支持事件监听
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}
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removeEventListener() {
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// 暂不支持事件监听
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}
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_init() {
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const dpr = wx.getSystemInfoSync().pixelRatio
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this.ctx.scale(dpr, dpr)
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}
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// 代理 canvas 方法
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setWidth(width) {
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// Canvas 2D 不需要手动设置
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}
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setHeight(height) {
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// Canvas 2D 不需要手动设置
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}
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getWidth() {
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return this.canvasNode.width
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}
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getHeight() {
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return this.canvasNode.height
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}
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addEvtListener() {
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// 事件监听
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}
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removeEvtListener() {
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// 移除监听
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}
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}
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