多chart平移问题

复现代码:

```

F2 图表组件库 - AntV




/*Fixing iframe window.innerHeight 0 issue in Safari*/ document.body
.clientHeight;

.chart-wrapper {
background-color: #101419;
}

.chart-container {
position: relative;
}

.chart-title {
width: 100%;
height: 20px;
line-height: 20px;
padding-left: 10px;
color: #676c79;
font-size: 12px;
font-weight: bold;
border-bottom: 1px solid #191e26;
}

canvas#chart {
height: 212px;
border-bottom: 1px solid #191e26;
margin-top: 16px;
}

canvas#volumn {
height: 50px;
border-bottom: 1px solid #191e26;
}

.tooltip-wrapper {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 20px;
display: flex;
flex-wrap: wrap;
align-content: space-between;
visibility: hidden;
padding: 0 10px;
border-bottom: 1px solid #191e26;
background-color: #101419;
}

.tooltip-wrapper .tooltip-item {
width: 15%;
height: 16px;
line-height: 16px;
vertical-align: middle;
}

.tooltip-wrapper .tooltip-item.last {
width: 40%;
}

.tooltip-wrapper .tooltip-item span {
display: inline;
color: #899198;
font-size: 12px;
}

.tooltip-wrapper .tooltip-item span.item-value {
font-weight: bold;
}

#barTooltip .tooltip-item {
width: 100%;
}

.ma-wrapper {
position: absolute;
top: 20px;
visibility: hidden;
width: 100%;
height: 16px;
display: flex;
flex-wrap: wrap;
align-content: flex-start;
padding: 0 10px 0 8px;
border-bottom: 1px solid #191e26;
background-color: #101419;
}

.ma-wrapper .tooltip-item {
width: auto;
height: 16px;
line-height: 16px;
vertical-align: middle;
font-size: 10px;
transform: scale(0.83);
}

.ma-wrapper .tooltip-item.first {
width: 7%;
}

.ma-wrapper .tooltip-item.first span {
background: #676c79;
padding: 0 4px;
}

.ma-wrapper .tooltip-item span {
display: inline;
color: #899198;
}

数据纯属虚构

手机扫码，体验更佳

var COLOR_MAP = ['#FF4433', '#32A532']; // 涨跌
var barChart = void 0;
var kChart = void 0;
// let min = null;
// let max = null;

function updateMATip(data, index) {
var currItem = data[index];
$('#ma .item-value').each(function (index, ele) {
var type = $(ele).data('type');
var value = currItem[type];
$(ele).text(value);
});
$('#ma').css('visibility', 'visible');
}

function getMinAndMax(data = [], currentValues = []) {
if (!data.length || !currentValues.length) {
return [null, null];
}

const firstIndex = data.findIndex(
(i) =>
i.reportDate === currentValues[0] ||
F2.Util.toTimeStamp(i.reportDate) === currentValues[0]
);
const lastIndex = data.findIndex(
(i) =>
i.reportDate === currentValues[currentValues.length - 1] ||
F2.Util.toTimeStamp(i.reportDate) ===
currentValues[currentValues.length - 1]
);

const currentData = data.slice(firstIndex, lastIndex + 1);
const result = currentData.reduce(
(result, current) => {
const minGroup = [
current.low,
current.MA5,
current.MA10,
current.MA20,
current.MA30,
];
const maxGroup = [
current.high,
current.MA5,
current.MA10,
current.MA20,
current.MA30,
];

if (!result[0] || !result[1]) {
const theMin = Math.min(...minGroup);
const theMax = Math.max(...maxGroup);
return [theMin, theMax];
}

const theMin = Math.min(...minGroup, result[0]);
const theMax = Math.max(...maxGroup, result[1]);
return [theMin, theMax];
},
[null, null]
);

return result;
}

function toDate(value) {
const d = new Date(value);
const years = d.getFullYear();
const months = `0${d.getMonth() + 1}`;
const days = `0${d.getDate()}`;
return `${years}-${months.substr(-2)}-${days.substr(-2)}`;
}

$.getJSON(
'https://gw.alipayobjects.com/os/antvdemo/assets/data/f2/1d-k.json',
function (data) {
// 构造数据结构
var reportDates = [];
data.forEach(function (obj) {
reportDates.push(obj.reportDate);
obj.range = [obj.start, obj.end, obj.high, obj.low];
obj.trend = obj.start <= obj.end ? 0 : 1; // 0 表示涨，1 表示跌
});
var firstShowDates = reportDates.slice(75); // 首屏展示的日期
// 绘制 K 线图
kChart = drawKChart(data, firstShowDates, reportDates);
// 绘制成交量柱状图
barChart = drawBarChart(data, firstShowDates);
}
);

// 绘制成交量柱状图
function drawBarChart(data, firstShowDates) {
const chart = new F2.Chart({
id: 'volumn',
padding: [0, 0, 6],
pixelRatio: window.devicePixelRatio,
});
chart.source(data, {
reportDate: {
type: 'timeCat',
values: firstShowDates,
},
});
chart.axis(false);
chart.tooltip({
alwaysShow: true,
showCrosshairs: true,
crosshairsStyle: {
stroke: '#D1D3D4',
lineWidth: 1,
},
showTooltipMarker: false,
custom: true,
onChange: function onChange(obj) {
var currentPoint = {
x: obj.x,
y: obj.y,
};
kChart.showTooltip(currentPoint);
var data = obj.items[0].origin;
$('#barTooltip .item-value').each(function (index, ele) {
var type = $(ele).data('type');
var value = data[type];
$(ele).css({
color: '#FFFFFF',
});
$(ele).text(value);
});
$('#barTooltip').css('visibility', 'visible');
},
onHide: function onHide() {
$('#barTooltip').css('visibility', 'hidden');
},
});
chart
.interval()
.position('reportDate*volumn')
.color('trend', function (val) {
return COLOR_MAP[val];
});
// chart.interaction('pinch', {
// maxScale: 25,
// onProcess: function onProcess() {
// if (this.pressed) return;
// var currentValues = chart.getXScale().values; // 获取平移后的当前展示 values
// kChart.scale('reportDate', {
// type: 'timeCat',
// values: currentValues,
// ticks: [
// '2018-06-08',
// '2018-07-02',
// '2018-08-01',
// '2018-09-03',
// '2018-10-08',
// '2018-11-01',
// ],
// });
// kChart.repaint();
// },
// onEnd: function onEnd() {
// kChart.hideTooltip();
// chart.hideTooltip();
// },
// });
chart.interaction('pan', {
onProcess: function onProcess() {
if (this.pressed) return;
var currentValues = chart.getXScale().values; // 获取平移后的当前展示 values

const [min, max] = getMinAndMax(data, currentValues);
// const newValues = currentValues.map((i) => toDate(i));
kChart.scale('reportDate', {
type: 'timeCat',
values: currentValues,
// ticks: [
// '2018-06-08',
// '2018-07-02',
// '2018-08-01',
// '2018-09-03',
// '2018-10-08',
// '2018-11-01',
// ],
});
kChart.scale('range', {
max,
min,
});
kChart.scale('MA5', {
max,
min,
});
kChart.scale('MA10', {
max,
min,
});
kChart.scale('MA20', {
max,
min,
});
kChart.scale('MA30', {
max,
min,
});
kChart.repaint();
},
onEnd: function onEnd() {
kChart.hideTooltip();
chart.hideTooltip();
kChart.repaint();
},
});
// // 添加进度条
// chart.scrollBar({
// mode: 'x',
// xStyle: {
// backgroundColor: 'rgba(202, 215, 239, .2)',
// fillerColor: '#818991',
// size: 4,
// lineCap: 'square',
// offsetX: 0,
// offsetY: 1,
// },
// });
chart.render();
return chart;
}

function drawKChart(data, firstShowDates, allDates) {
const [firstMin, firstMax] = getMinAndMax(data, firstShowDates);
const chart = new F2.Chart({
id: 'chart',
padding: [0, 0, 18],
pixelRatio: window.devicePixelRatio,
syncY: true,
});
chart.source(data, {
reportDate: {
type: 'timeCat',
ticks: [
'2018-06-08',
'2018-07-02',
'2018-08-01',
'2018-09-03',
'2018-10-08',
'2018-11-01',
],
values: firstShowDates,
sortable: false,
},
range: {
nice: false,
max: firstMax,
min: firstMin,
},
MA5: {
nice: false,
max: firstMax,
min: firstMin,
},
MA10: {
nice: false,
max: firstMax,
min: firstMin,
},
MA20: {
nice: false,
max: firstMax,
min: firstMin,
},
MA30: {
nice: false,
max: firstMax,
min: firstMin,
},
});
chart.axis('reportDate', {
labelOffset: 1,
label: function label(text, index, total) {
var textAlign = 'center';
if (index === 0) {
textAlign = 'start';
} else if (index === total - 1) {
textAlign = 'end';
}
return {
text: text.slice(0, 7),
fill: '#818991',
textAlign: textAlign,
};
},

line: {
stroke: '#181D26',
},
grid: {
lineWidth: 1,
stroke: '#181D26',
},
});
chart.axis('range', {
line: {
stroke: '#181D26',
},
grid: {
stroke: '#181D26',
},
labelOffset: -2,
label: function label(text, index, total) {
var cfg = {
textAlign: 'start',
text: parseFloat(text).toFixed(2),
fill: '#818991',
};
if (index === 0) {
cfg.textBaseline = 'bottom';
} else if (index === total - 1) {
cfg.textBaseline = 'top';
}
return cfg;
},
});
chart.axis('MA5', false);
chart.axis('MA10', false);
chart.axis('MA20', false);
chart.axis('MA30', false);
chart.tooltip({
showTooltipMarker: false,
alwaysShow: true,
showCrosshairs: true,
crosshairsType: 'xy',
showXTip: true,
showYTip: true,
crosshairsStyle: {
stroke: '#D1D3D4',
lineWidth: 1,
},
xTip: {
fill: '#80888F',
fontSize: 10,
},
yTip: function yTip(val) {
return {
fill: '#80888F',
fontSize: 10,
text: val.toFixed(3),
};
},

xTipBackground: {
fill: '#232C39',
fillOpacity: 0.75,
radius: 2,
},
yTipBackground: {
fill: '#232C39',
fillOpacity: 0.75,
radius: 2,
},
custom: true,
onChange: function onChange(obj) {
var currentPoint = {
x: obj.x,
y: obj.y,
};
barChart.showTooltip(currentPoint);
var currData = obj.items[0].origin;
$('#kTooltip .item-value').each(function (index, ele) {
var type = $(ele).data('type');
var value = currData[type];
var color = void 0;
if (type === 'volumn') {
color = '#FFF';
} else {
color = currData.trend === 0 ? COLOR_MAP[0] : COLOR_MAP[1];
}
$(ele).css({
color: color,
});
$(ele).text(value);
});
$('#kTooltip').css('visibility', 'visible');

updateMATip(data, allDates.indexOf(currData.reportDate));
},
onHide: function onHide() {
$('#kTooltip').css('visibility', 'hidden');
$('#ma').css('visibility', 'hidden');
},
});
chart
.schema()
.position('reportDate*range')
.color('trend', function (val) {
return COLOR_MAP[val];
})
.shape('candle');
chart
.line()
.position('reportDate*MA5')
.color('#C6268B')
.size(1)
.animate(false);
chart
.line()
.position('reportDate*MA10')
.color('#D7A429')
.size(1)
.animate(false);
chart
.line()
.position('reportDate*MA20')
.color('#227BAF')
.size(1)
.animate(false);
chart
.line()
.position('reportDate*MA30')
.color('#6960C4')
.size(1)
.animate(false);

// chart.interaction('pinch', {
// maxScale: 25,
// onProcess: function onProcess() {
// if (this.pressed) return;

// var currentValues = chart.getXScale().values; // 获取平移后的当前展示 values
// barChart.scale('reportDate', {
// type: 'timeCat',
// values: currentValues,
// });
// barChart.repaint();
// },
// onEnd: function onEnd() {
// barChart.hideTooltip();
// chart.hideTooltip();
// },
// });
chart.interaction('pan', {
onStart: function onStart() {},
onProcess: function onProcess() {
if (this.pressed) return; // TODO, 这个标识位好恶心

const currentValues = chart.getXScale().values; // 获取平移后的当前展示 values
// const newValues = currentValues.map((i) => toDate(i));
barChart.scale('reportDate', {
type: 'timeCat',
values: currentValues,
});
barChart.repaint();

const [min, max] = getMinAndMax(data, currentValues);

const yScales = chart.getYScales();
yScales.forEach((item) => {
this.updateLinearScale(item.field, min, max);
});
},
onEnd: function onEnd() {
barChart.hideTooltip();
chart.hideTooltip();
barChart.repaint();
},
});
chart.render();
return chart;
}

```

复现步骤:
滑动"蜡烛图", 再滑动"条形图", 这时候"蜡烛图"显示就不完整了. 反之也是一样, 只有一直滑同一个chart才正常

Start with the supplied HTML reproduction using F2 3.7.8, then inspect drawBarChart's pan interaction, getMinAndMax, and the calls that update kChart. Compare both chart instances while panning; done means the linked charts remain synchronized without the reported multi-chart pan problem.

Written by the indexing model from the issue text.