/
custom-line.html
175 lines (155 loc) · 4.28 KB
/
custom-line.html
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
<!doctype html>
<html>
<head>
<title>Line Chart with external Tooltips</title>
<script src="../../dist/chart.min.js"></script>
<script src="../utils.js"></script>
<style>
canvas{
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
.chartjs-tooltip {
opacity: 1;
position: absolute;
background: rgba(0, 0, 0, .7);
color: white;
border-radius: 3px;
-webkit-transition: all .1s ease;
transition: all .1s ease;
pointer-events: none;
-webkit-transform: translate(-50%, 0);
transform: translate(-50%, 0);
}
.chartjs-tooltip-key {
display: inline-block;
width: 10px;
height: 10px;
margin-right: 10px;
}
</style>
</head>
<body>
<div id="canvas-holder1" style="width:75%;">
<canvas id="chart"></canvas>
</div>
<script>
Chart.defaults.pointHitDetectionRadius = 1;
var getOrCreateTooltip = function(chart) {
var tooltipEl = chart.canvas.parentNode.querySelector('div');
if (!tooltipEl) {
tooltipEl = document.createElement('div');
tooltipEl.classList.add('chartjs-tooltip');
tooltipEl.innerHTML = '<table></table>';
chart.canvas.parentNode.appendChild(tooltipEl);
}
return tooltipEl;
};
var externalTooltips = function(context) {
// Tooltip Element
var chart = context.chart;
var tooltipEl = getOrCreateTooltip(chart);
// Hide if no tooltip
var tooltip = context.tooltip;
if (tooltip.opacity === 0) {
tooltipEl.style.opacity = 0;
return;
}
// Set caret Position
tooltipEl.classList.remove('above', 'below', 'no-transform');
if (tooltip.yAlign) {
tooltipEl.classList.add(tooltip.yAlign);
} else {
tooltipEl.classList.add('no-transform');
}
function getBody(bodyItem) {
return bodyItem.lines;
}
// Set Text
if (tooltip.body) {
var titleLines = tooltip.title || [];
var bodyLines = tooltip.body.map(getBody);
var innerHtml = '<thead>';
titleLines.forEach(function(title) {
innerHtml += '<tr><th>' + title + '</th></tr>';
});
innerHtml += '</thead><tbody>';
bodyLines.forEach(function(body, i) {
var colors = tooltip.labelColors[i];
var style = 'background:' + colors.backgroundColor;
style += '; border-color:' + colors.borderColor;
style += '; border-width: 2px';
var span = '<span class="chartjs-tooltip-key" style="' + style + '"></span>';
innerHtml += '<tr><td>' + span + body + '</td></tr>';
});
innerHtml += '</tbody>';
var tableRoot = tooltipEl.querySelector('table');
tableRoot.innerHTML = innerHtml;
}
var positionY = chart.canvas.offsetTop;
var positionX = chart.canvas.offsetLeft;
// Display, position, and set styles for font
tooltipEl.style.opacity = 1;
tooltipEl.style.left = positionX + tooltip.caretX + 'px';
tooltipEl.style.top = positionY + tooltip.caretY + 'px';
tooltipEl.style.font = tooltip.options.bodyFont.string;
tooltipEl.style.padding = tooltip.padding + 'px ' + tooltip.padding + 'px';
};
var lineChartData = {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [{
label: 'My First dataset',
borderColor: window.chartColors.red,
pointBackgroundColor: window.chartColors.red,
fill: false,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}, {
label: 'My Second dataset',
borderColor: window.chartColors.blue,
pointBackgroundColor: window.chartColors.blue,
fill: false,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}]
};
window.onload = function() {
var chartEl = document.getElementById('chart');
window.myLine = new Chart(chartEl, {
type: 'line',
data: lineChartData,
options: {
plugins: {
title: {
display: true,
text: 'Chart.js Line Chart - External Tooltips'
},
tooltip: {
enabled: false,
mode: 'index',
intersect: false,
position: 'nearest',
external: externalTooltips
}
}
}
});
};
</script>
</body>
</html>