some modify

This commit is contained in:
jiaming
2018-12-24 18:25:29 +08:00
parent be273d8906
commit 124baba8bf
7 changed files with 410 additions and 791 deletions

View File

@ -1,304 +1,230 @@
<template>
<div class="polyline-chart">
<loading v-if="!data" />
<div class="canvas-container">
<canvas :ref="ref" />
</div>
<loading v-if="!data" />
<label-line :label="data.labelLine" :colors="drawColors" />
<div v-if="data.labelLine" class="label-line">
<div class="label-item" v-for="(label, i) in data.labelLine" :key="label + i">
<div :style="`background-color: ${data.color[i % data.color.length]};`"></div>
<div>{{ label }}</div>
</div>
</div>
<div class="for-slot">
<slot></slot>
</div>
<for-slot><slot></slot></for-slot>
</div>
</template>
<script>
import colorsMixin from '../../mixins/colorsMixin.js'
import canvasMixin from '../../mixins/canvasMixin.js'
import axisMixin from '../../mixins/axisMixin.js'
export default {
name: 'PolylineChart',
props: ['data'],
mixins: [colorsMixin, canvasMixin, axisMixin],
props: ['data', 'colors'],
data () {
return {
ref: `polyline-chart-${(new Date()).getTime()}`,
canvasDom: '',
canvasWH: [0, 0],
ctx: '',
defaultFontSize: 10,
defaultAxisColor: 'rgba(250, 250, 250, 0.25)',
// axis base config
boundaryGap: false,
mulValueAdd: false,
horizon: false,
xAxisData: [],
yAxisData: [],
axisWH: [],
axisOriginPos: [],
yAxisMinMax: [],
rowColumnSize: [],
valuePointsData: []
defaultLineDash: [10, 5],
defaultPointRadius: 2,
defaultValueFontSize: 10,
defaultValueColor: '#999',
valuePointPos: []
}
},
watch: {
data (d) {
const { init } = this
d && init()
}
},
methods: {
init () {
const { $nextTick, initCanvas, data, draw } = this
async init () {
const { initCanvas, initColors } = this
$nextTick(e => {
initCanvas()
await initCanvas()
data && draw()
})
},
initCanvas () {
const { $refs, ref, canvasWH } = this
initColors()
const canvas = this.canvasDom = $refs[ref]
const { data, draw } = this
canvasWH[0] = canvas.clientWidth
canvasWH[1] = canvas.clientHeight
canvas.setAttribute('width', canvasWH[0])
canvas.setAttribute('height', canvasWH[1])
this.ctx = canvas.getContext('2d')
data && draw()
},
draw () {
const { ctx, canvasWH, getXAxisData, getYAxisData, calcAxisPos, drawAxis } = this
const { clearCanvas } = this
ctx.clearRect(0, 0, ...canvasWH)
clearCanvas()
getXAxisData()
const { initAxisConfig, initAxis, drawAxis } = this
getYAxisData()
initAxisConfig()
calcAxisPos()
initAxis()
drawAxis()
const { calcValuePointsData, drawValueColumn, drawValuePolyline } = this
const { calcValuePointPos, drawLines, drawFills } = this
calcValuePointsData()
calcValuePointPos()
drawValueColumn()
drawLines()
drawValuePolyline()
drawFills()
const { drawValuePoints, fillLineColor } = this
const { drawPoints, drawValues } = this
fillLineColor()
drawPoints()
drawValuePoints()
drawValues()
},
getXAxisData () {
const { data: { x: { data } } } = this
initAxisConfig () {
const { data: { boundaryGap } } = this
this.xAxisData = data
this.boundaryGap = boundaryGap
},
getYAxisData () {
let { data: { data, y: { data: yAxisData, max, min, num, fixed } }, filterNull, yAxisMinMax } = this
calcValuePointPos () {
const { valueAxisMaxMin, axisOriginPos, axisWH, labelAxisTagPos, horizon } = this
if (yAxisData) {
this.yAxisData = yAxisData
const { data: { data }, getAxisPointsPos } = this
return
this.valuePointPos = data.map(({ data, againstAxis }) =>
getAxisPointsPos(
valueAxisMaxMin,
data,
axisOriginPos,
axisWH,
labelAxisTagPos,
horizon
))
},
drawLines () {
const { data: { data }, valuePointPos, drawLine } = this
data.forEach((line, i) => drawLine(line, valuePointPos[i], i))
},
drawLine ({ type, lineType, lineDash, lineColor }, points, i) {
const { ctx, drawColors, defaultLineDash } = this
const { canvas: { drawPolyline, drawSmoothline } } = this
const { color: { hexToRgb } } = this
let drawLineFun = drawPolyline
type === 'smoothline' && (drawLineFun = drawSmoothline)
let color = hexToRgb(drawColors[i], 0.8)
lineColor && (color = lineColor)
let tureLineType = lineType || 'line'
const tureLineDash = tureLineType === 'dashed' ? (lineDash || defaultLineDash) : [10, 0]
drawLineFun(ctx, points, 1, color, false, tureLineDash, true, true)
},
drawFills () {
const { data: { data }, valuePointPos, drawFill } = this
data.forEach((line, i) => drawFill(line, valuePointPos[i]))
},
drawFill ({ fillColor, type, data }, points) {
if (!fillColor) return
const { canvas: { drawPolylinePath, drawSmoothlinePath } } = this
const { ctx, getGradientColor, filterNull, axisOriginPos: [, y] } = this
let drawLineFun = drawPolylinePath
type === 'smoothline' && (drawLineFun = drawSmoothlinePath)
const maxValue = Math.max(...filterNull(data))
const maxValueIndex = data.findIndex(v => v === maxValue)
const color = getGradientColor(points[maxValueIndex], fillColor)
const lastPoint = points[points.length - 1]
ctx.fillStyle = color
drawLineFun(ctx, points, false, true, true)
ctx.lineTo(lastPoint[0], y)
ctx.lineTo(points[0][0], y)
ctx.closePath()
ctx.fill()
},
getGradientColor (value, colors) {
const { data: { localGradient }, axisAnglePos, horizon } = this
const { ctx, canvas: { getLinearGradientColor } } = this
if (localGradient) {
return getLinearGradientColor(ctx,
...(horizon
? [value, [axisAnglePos.leftTop[0], value[1]]]
: [value, [value[0], axisAnglePos.leftBottom[1]]]),
colors)
} else {
return getLinearGradientColor(ctx,
...(horizon
? [axisAnglePos.leftTop, axisAnglePos.rightTop]
: [axisAnglePos.leftTop, axisAnglePos.leftBottom]),
colors)
}
let [unsetMax, unsetMin] = [false, false]
!max && max !== 0 && (max = Math.max(...data.map(({ data: td }) => Math.max(...td)))) && (unsetMax = true)
!min && min !== 0 && (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 < 9 ? minus + 1 : 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
drawPoints () {
const { data: { data }, valuePointPos, drawPoint } = 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)
data.forEach((line, i) => drawPoint(line, valuePointPos[i], i))
},
drawAxis () {
const { ctx, xAxisData, yAxisData, axisOriginPos, axisWH, canvasWH } = this
drawPoint ({ pointColor }, points, i) {
const { ctx, drawColors, defaultPointRadius } = this
const { defaultAxisColor, rowColumnSize, defaultFontSize, data: { x, y, boundaryGap } } = this
const { canvas: { drawPoints: drawPFun } } = this
const { unit: xUT, lineColor: xLC, color: xC, fontSize: xFS } = x
const color = pointColor || drawColors[i]
const { unit: yUT, lineColor: yLC, color: yC, fontSize: yFS } = y
drawPFun(ctx, points, defaultPointRadius, color)
},
drawValues () {
const { ctx, data: { data, showValueText, valueTextColor, valueTextOffset, valueTextFontSize } } = this
const { canvas: { drawLine } } = this
if (!showValueText) return
drawLine(ctx, axisOriginPos, [axisOriginPos[0] + axisWH[0], axisOriginPos[1]], 1, (xLC || defaultAxisColor))
drawLine(ctx, axisOriginPos, [axisOriginPos[0], axisOriginPos[1] - axisWH[1]], 1, (yLC || defaultAxisColor))
const { defaultValueFontSize, defaultValueColor, valuePointPos, drawValue } = this
ctx.fillStyle = xC || 'rgba(250, 250, 250, 0.6)'
const offset = valueTextOffset || [0, -5]
ctx.font = `${xFS || defaultFontSize}px Microsoft Yahei`
ctx.fillStyle = valueTextColor || defaultValueColor
ctx.font = `${valueTextFontSize || defaultValueFontSize}px Arial`
ctx.textAlign = 'center'
ctx.textBaseline = 'top'
ctx.textBaseline = 'bottom'
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)
data.forEach((line, i) => drawValue(line, valuePointPos[i], offset))
},
calcValuePointsData () {
const { axisWH, axisOriginPos, yAxisMinMax: [min, max], rowColumnSize } = this
drawValue ({ data }, points, offset) {
const { ctx, getOffsetPoints } = this
const { data: { data, x, boundaryGap } } = this
getOffsetPoints(points, offset).forEach((pos, i) => {
if (!data[i] && data[i] !== 0) return
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
const numberData = data.map(({ data: td }) => ({ data: td.map(v => ((!v && v === 0) || v) ? Number(v) : NaN) }))
this.valuePointsData =
numberData.map(({ data: td }) =>
td.map((v, i) =>
Number.isFinite(v)
? [xPos[i], axisOriginPos[1] - (v - min) / minus * axisWH[1]]
: false))
},
drawValueColumn () {
const { ctx, valuePointsData, data: { data, color }, rowColumnSize, axisOriginPos, canvas, filterNull } = this
const { getLinearGradientColor } = canvas
const colorNum = color.length
const columnWidth = rowColumnSize[1] / 3 * 2
const offset = columnWidth / 2
data.forEach(({ columnColor, type }, i) => {
if (type !== 'column') return
const filterPoints = filterNull(valuePointsData[i])
filterPoints.forEach(point => {
const height = axisOriginPos[1] - point[1]
ctx.fillStyle = getLinearGradientColor(ctx, point, [point[0],
axisOriginPos[1]], columnColor || color[i % colorNum])
ctx.fillRect(point[0] - offset, point[1], columnWidth, height)
})
ctx.fillText(data[i], ...pos)
})
},
drawValuePolyline () {
const { ctx, valuePointsData, canvas, color: { hexToRgb } } = this
const { data: { data, color } } = this
const colorNum = color.length
data.forEach(({ lineColor, dashed, type }, i) =>
(!type || type === 'polyline' || type === 'smoothline') &&
canvas[(!type || type === 'polyline') ? 'drawPolyline' : 'drawSmoothline'](
ctx, valuePointsData[i], 1,
hexToRgb(lineColor || color[i % colorNum], 0.8), false,
(dashed ? [5, 5] : [10, 0]), true, true))
getOffsetPoint ([x, y], [ox, oy]) {
return [x + ox, y + oy]
},
fillLineColor () {
const { ctx, valuePointsData, canvas, axisOriginPos, axisWH, data: { data }, filterNull } = this
getOffsetPoints (points, offset) {
const { getOffsetPoint } = this
const { getLinearGradientColor } = canvas
const colorBegin = [axisOriginPos[0], axisOriginPos[1] - axisWH[1]]
data.forEach(({ fillColor, type }, i) => {
if (!fillColor) return
const currentValuePointData = filterNull(valuePointsData[i])
const pointNum = currentValuePointData.length
const rightBottom = [currentValuePointData[pointNum - 1][0], axisOriginPos[1]]
const leftBottom = [currentValuePointData[0][0], axisOriginPos[1]]
canvas[(!type || type === 'polyline') ? 'drawPolylinePath' : 'drawSmoothlinePath'](
ctx, currentValuePointData, false, true, true)
ctx.lineTo(...rightBottom)
ctx.lineTo(...leftBottom)
ctx.closePath()
ctx.fillStyle = getLinearGradientColor(ctx, colorBegin, axisOriginPos, fillColor)
ctx.fill()
})
},
drawValuePoints () {
const { ctx, valuePointsData, data: { data, color }, canvas: { drawPoints } } = this
const colorNum = color.length
data.forEach(({ pointColor, type }, i) =>
type !== 'column' &&
drawPoints(ctx, valuePointsData[i], 4, pointColor || color[i % colorNum]))
return points.map(point => point ? getOffsetPoint(point, offset) : false)
}
},
mounted () {
@ -323,35 +249,5 @@ export default {
height: 100%;
}
}
.label-line {
display: flex;
flex-direction: row;
justify-content: center;
flex-wrap: wrap;
font-size: 10px;
}
.label-item {
display: flex;
flex-direction: row;
align-items: center;
height: 15px;
margin: 0px 3px;
:nth-child(1) {
width: 10px;
height: 10px;
margin-right: 5px;
}
}
.for-slot {
position: absolute;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
}
}
</style>