some optmization

This commit is contained in:
jiaming 2018-12-10 18:22:16 +08:00
parent 2b17c7e9a8
commit 4162cc0475
1 changed files with 180 additions and 3 deletions

View File

@ -14,18 +14,31 @@ export default {
props: ['data'],
data () {
return {
ref: `ring-chart-${(new Date()).getTime()}`,
ref: `polyline-chart-${(new Date()).getTime()}`,
canvasDom: '',
canvasWH: [0, 0],
ctx: ''
ctx: '',
defaultFontSize: 10,
defaultAxisColor: 'rgba(250, 250, 250, 0.25)',
xAxisData: [],
yAxisData: [],
axisWH: [],
axisOriginPos: [],
yAxisMinMax: [],
rowColumnSize: [],
valuePointsData: []
}
},
methods: {
init () {
const { $nextTick, initCanvas } = this
const { $nextTick, initCanvas, data, draw } = this
$nextTick(e => {
initCanvas()
data && draw()
})
},
initCanvas () {
@ -40,6 +53,170 @@ export default {
canvas.setAttribute('height', canvasWH[1])
this.ctx = canvas.getContext('2d')
},
draw () {
const { ctx, canvasWH, getXAxisData, getYAxisData, calcAxisPos, drawAxis } = this
ctx.clearRect(0, 0, ...canvasWH)
getXAxisData()
getYAxisData()
calcAxisPos()
drawAxis()
const { calcValuePointsData, drawValuePolyline, drawValueSmoothline, drawValuePoints } = this
calcValuePointsData()
drawValuePolyline()
drawValueSmoothline()
drawValuePoints()
},
getXAxisData () {
const { data: { x: { data } } } = this
this.xAxisData = data
},
getYAxisData () {
let { data: { data, y: { data: yAxisData, max, min, num, fixed } }, filterNull, yAxisMinMax } = this
if (yAxisData) {
this.yAxisData = yAxisData
return
}
let [unsetMax, unsetMin] = [false, false]
!max && (max = Math.max(...data.map(({ data: td }) => Math.max(...td)))) && (unsetMax = true)
!min && (min = Math.min(...data.map(({ data: td }) => Math.min(...filterNull(td))))) && (unsetMin = true)
let minus = max - min
unsetMax && (max += minus / 2) && (max = Math.ceil(max))
unsetMin && (min -= minus / 2) && (min = Math.floor(min))
yAxisMinMax[0] = min
yAxisMinMax[1] = max
minus = max - min
!num && (num = minus < 10 ? minus : 10)
const gapNum = minus / (num - 1)
this.yAxisData = new Array(num).fill(0).map((t, i) => (max - gapNum * i).toFixed(fixed || 0)).reverse()
},
calcAxisPos () {
const { ctx, canvasWH, xAxisData, yAxisData, axisWH, axisOriginPos, rowColumnSize, data } = this
const { x: { unit: xUT, offset: xOF }, y: { unit: yUT, fontSize: yFS, offset: yOF }, boundaryGap } = data
ctx.font = `${yFS}px Arial`
let yAxisMaxWidth = Math.max(...yAxisData.map(v => ctx.measureText(v).width))
const yAxisUnitWidth = ctx.measureText(yUT || '').width
yAxisMaxWidth < yAxisUnitWidth && (yAxisMaxWidth = yAxisUnitWidth)
const yAxisRowHeight = (canvasWH[1] - (xOF || 20)) / (yAxisData.length + 1)
const xAxisColumnWidth = (canvasWH[0] - (yOF || (yAxisMaxWidth + 10)) - ctx.measureText(xUT || '').width - 10) / (xAxisData.length + 1)
axisWH[0] = xAxisColumnWidth * xAxisData.length
axisWH[1] = yAxisRowHeight * yAxisData.length
rowColumnSize[0] = axisWH[1] / (yAxisData.length - 1)
rowColumnSize[1] = axisWH[0] / (boundaryGap ? xAxisData.length : xAxisData.length - 1)
axisOriginPos[0] = (yOF || yAxisMaxWidth) + 10
axisOriginPos[1] = canvasWH[1] - (xOF || 20)
},
drawAxis () {
const { ctx, xAxisData, yAxisData, axisOriginPos, axisWH, canvasWH } = this
const { defaultAxisColor, rowColumnSize, defaultFontSize, data: { x, y, boundaryGap } } = this
const { unit: xUT, lineColor: xLC, color: xC, fontSize: xFS } = x
const { unit: yUT, lineColor: yLC, color: yC, fontSize: yFS } = y
const { canvas: { drawLine } } = this
drawLine(ctx, axisOriginPos, [axisOriginPos[0] + axisWH[0], axisOriginPos[1]], 1, (xLC || defaultAxisColor))
drawLine(ctx, axisOriginPos, [axisOriginPos[0], axisOriginPos[1] - axisWH[1]], 1, (yLC || defaultAxisColor))
ctx.fillStyle = xC || 'rgba(250, 250, 250, 0.6)'
ctx.font = `${xFS || defaultFontSize}px Microsoft Yahei`
ctx.textAlign = 'center'
ctx.textBaseline = 'top'
const columnWidth = rowColumnSize[1]
const columnOffset = boundaryGap ? columnWidth / 2 : 0
xAxisData.forEach((text, i) => ctx.fillText(text, axisOriginPos[0] + (i * columnWidth) + columnOffset, axisOriginPos[1] + 3))
xUT && (ctx.textAlign = 'end') && ctx.fillText(xUT, canvasWH[0], axisOriginPos[1] + 3)
ctx.font = `${yFS || defaultFontSize}px Microsoft Yahei`
ctx.fillStyle = yC || 'rgba(250, 250, 250, 0.6)'
ctx.textAlign = 'right'
ctx.textBaseline = 'middle'
const rowHeight = rowColumnSize[0]
yAxisData.forEach((text, i) => ctx.fillText(text, axisOriginPos[0] - 7, axisOriginPos[1] - (i * rowHeight)))
yUT && (ctx.textBaseline = 'top') && ctx.fillText(yUT, axisOriginPos[0] - 7, 0)
},
calcValuePointsData () {
const { axisWH, axisOriginPos, yAxisMinMax: [min, max], rowColumnSize } = this
const { data: { data, x, boundaryGap } } = this
const columnWidth = rowColumnSize[1]
const xOffset = (boundaryGap ? columnWidth / 2 : 0)
const xPos = new Array(x.data.length).fill(0).map((v, i) => axisOriginPos[0] + (columnWidth * i) + xOffset)
const minus = max - min
this.valuePointsData =
data.map(({ data: td }) =>
td.map((v, i) =>
Number.isFinite(v)
? [xPos[i], axisOriginPos[1] - (v - min) / minus * axisWH[1]]
: false))
},
drawValuePolyline () {
const { ctx, valuePointsData, canvas: { drawPolyline }, color: { hexToRgb } } = this
const { data: { data, color } } = this
const colorNum = color.length
data.forEach(({ lineColor, dashed, type }, i) => type !== 'smoothline' &&
drawPolyline(ctx, valuePointsData[i], 1,
hexToRgb(lineColor || color[i % colorNum], 0.8), false, (dashed ? [5, 5] : [10, 0])))
},
drawValueSmoothline () {
},
drawValuePoints () {
const { ctx, valuePointsData, data: { data, color }, canvas: { drawPoints } } = this
const colorNum = color.length
data.forEach(({ pointColor }, i) => drawPoints(ctx, valuePointsData[i], 4, pointColor || color[i % colorNum]))
}
},
mounted () {