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optimization

This commit is contained in:
jiaming 2018-12-11 14:11:12 +08:00
parent 8b9af7ca68
commit 9bfedbab72
1 changed files with 7 additions and 8 deletions
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15
src/components/concentricArcChart/index.vue
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@ -21,6 +21,7 @@ export default {
defaultArcRadiusArea: [0.2, 0.8],
defaultArcGap: 3,
defaultArcColor: ['#00c0ff', '#3de7c9'],
arcRadius: [],
arcRadian: [],
@ -114,17 +115,15 @@ export default {
this.arcRadian = new Array(data.length).fill(0).map((t, i) => data[i].value * fullRadian - offsetRadian)
},
calcArcColor () {
const { ctx, data: { color }, arcRadius: [ radius ], arcLineWidth, arcOriginPos: [x, y] } = this
const { ctx, arcLineWidth, defaultArcColor, canvas: { getLinearGradientColor } } = this
const linearGradientColor = ctx.createLinearGradient(x, y - radius - arcLineWidth, x, y + radius + arcLineWidth)
const { data: { color }, arcRadius: [ radius ], arcOriginPos: [x, y] } = this
const colorGap = 1 / (color.length - 1)
const colors = color || defaultArcColor
color.forEach((c, i) => linearGradientColor.addColorStop(colorGap * i, c))
this.arcColor = linearGradientColor
this.ctx.strokeStyle = linearGradientColor
this.arcColor = getLinearGradientColor(ctx,
[x, y - radius - arcLineWidth],
[x, y + radius + arcLineWidth], colors)
},
drawArc () {
const { ctx, arcRadius, arcRadian, arcOriginPos, arcLineWidth, arcColor } = this