external-tooltip.ts
3.33 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
import { Chart, TooltipModel } from 'chart.js'
import { computePosition, flip, shift } from '@floating-ui/dom'
const getOrCreateTooltip = (chart: Chart) => {
let tooltipEl = chart.canvas.parentNode?.querySelector('div')
if (!tooltipEl) {
tooltipEl = document.createElement('div')
tooltipEl.style.background = 'rgba(0, 0, 0, 0.7)'
tooltipEl.style.borderRadius = '3px'
tooltipEl.style.color = 'white'
tooltipEl.style.opacity = '1'
tooltipEl.style.pointerEvents = 'none'
tooltipEl.style.position = 'absolute'
// tooltipEl.style.transform = 'translate(-50%, 0)'
tooltipEl.style.left = '0'
tooltipEl.style.top = '0'
tooltipEl.style.transition = 'all .1s ease'
tooltipEl.style.height = 'min-content'
tooltipEl.style.maxWidth = '200px'
tooltipEl.style.zIndex = '9999'
const table = document.createElement('table')
table.style.margin = '0px'
tooltipEl.appendChild(table)
chart.canvas.parentNode?.appendChild(tooltipEl)
}
return tooltipEl
}
export const externalTooltipHandler = (context: { chart: Chart; tooltip: TooltipModel<any> }) => {
// Tooltip Element
const { chart, tooltip } = context
const tooltipEl = getOrCreateTooltip(chart)
// Hide if no tooltip
if (tooltip.opacity === 0) {
tooltipEl.style.opacity = '0'
return
}
// Set Text
if (tooltip.body) {
const titleLines = tooltip.title || []
const bodyLines = tooltip.body.map((b) => b.lines)
const tableHead = document.createElement('thead')
titleLines.forEach((title) => {
const tr = document.createElement('tr')
tr.style.borderWidth = '0'
const th = document.createElement('th')
th.style.borderWidth = '0'
const text = document.createTextNode(title)
th.appendChild(text)
tr.appendChild(th)
tableHead.appendChild(tr)
})
const tableBody = document.createElement('tbody')
bodyLines.forEach((body, i) => {
const colors = tooltip.labelColors[i]
const span = document.createElement('span')
span.style.background = String(colors.backgroundColor)
span.style.borderColor = String(colors.borderColor)
span.style.borderWidth = '2px'
span.style.marginRight = '10px'
span.style.height = '10px'
span.style.width = '10px'
span.style.display = 'inline-block'
const tr = document.createElement('tr')
tr.style.backgroundColor = 'inherit'
tr.style.borderWidth = '0'
const td = document.createElement('td')
td.style.borderWidth = '0'
const text = document.createTextNode(body as any)
td.appendChild(span)
td.appendChild(text)
tr.appendChild(td)
tableBody.appendChild(tr)
})
const tableRoot = tooltipEl.querySelector('table')
// Remove old children
while (tableRoot?.firstChild) {
tableRoot.firstChild.remove()
}
// Add new children
tableRoot?.appendChild(tableHead)
tableRoot?.appendChild(tableBody)
}
// Display, position, and set styles for font
tooltipEl.style.opacity = '1'
tooltipEl.style.padding = tooltip.options.padding + 'px ' + tooltip.options.padding + 'px'
computePosition(chart.canvas.parentNode! as HTMLElement, tooltipEl!, {
placement: 'top',
middleware: [flip(), shift()],
}).then(({ x, y }) => {
Object.assign(tooltipEl!.style, {
left: `${x}px`,
top: `${y}px`,
})
})
}