2021-04-02 14:04:39 +02:00
|
|
|
# Position
|
|
|
|
|
|
|
|
This sample shows how to use the tooltip position mode setting.
|
|
|
|
|
|
|
|
```js chart-editor
|
|
|
|
// <block:actions:3>
|
|
|
|
const actions = [
|
|
|
|
{
|
|
|
|
name: 'Position: average',
|
|
|
|
handler(chart) {
|
|
|
|
chart.options.plugins.tooltip.position = 'average';
|
|
|
|
chart.update();
|
|
|
|
}
|
|
|
|
},
|
|
|
|
{
|
|
|
|
name: 'Position: nearest',
|
|
|
|
handler(chart) {
|
|
|
|
chart.options.plugins.tooltip.position = 'nearest';
|
|
|
|
chart.update();
|
|
|
|
}
|
|
|
|
},
|
|
|
|
{
|
|
|
|
name: 'Position: bottom (custom)',
|
|
|
|
handler(chart) {
|
|
|
|
chart.options.plugins.tooltip.position = 'bottom';
|
|
|
|
chart.update();
|
|
|
|
}
|
|
|
|
},
|
|
|
|
];
|
|
|
|
// </block:actions>
|
|
|
|
|
|
|
|
// <block:setup:2>
|
|
|
|
const DATA_COUNT = 7;
|
|
|
|
const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100};
|
|
|
|
const data = {
|
|
|
|
labels: Utils.months({count: DATA_COUNT}),
|
|
|
|
datasets: [
|
|
|
|
{
|
|
|
|
label: 'Dataset 1',
|
|
|
|
data: Utils.numbers(NUMBER_CFG),
|
|
|
|
fill: false,
|
|
|
|
borderColor: Utils.CHART_COLORS.red,
|
|
|
|
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
|
|
|
|
},
|
|
|
|
{
|
|
|
|
label: 'Dataset 2',
|
|
|
|
data: Utils.numbers(NUMBER_CFG),
|
|
|
|
fill: false,
|
|
|
|
borderColor: Utils.CHART_COLORS.blue,
|
|
|
|
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
|
|
|
|
},
|
|
|
|
]
|
|
|
|
};
|
|
|
|
// </block:setup>
|
|
|
|
|
|
|
|
// <block:positioner:1>
|
|
|
|
// Create a custom tooltip positioner to put at the bottom of the chart area
|
|
|
|
components.Tooltip.positioners.bottom = function(items) {
|
|
|
|
const pos = components.Tooltip.positioners.average(items);
|
2021-04-02 23:25:14 +02:00
|
|
|
|
|
|
|
// Happens when nothing is found
|
|
|
|
if (pos === false) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2021-12-06 13:39:06 +01:00
|
|
|
const chart = this.chart;
|
2021-04-02 14:04:39 +02:00
|
|
|
|
|
|
|
return {
|
|
|
|
x: pos.x,
|
|
|
|
y: chart.chartArea.bottom,
|
2021-12-06 13:39:06 +01:00
|
|
|
xAlign: 'center',
|
|
|
|
yAlign: 'bottom',
|
2021-04-02 14:04:39 +02:00
|
|
|
};
|
|
|
|
};
|
|
|
|
|
|
|
|
// </block:positioner>
|
|
|
|
|
|
|
|
// <block:config:0>
|
|
|
|
const config = {
|
|
|
|
type: 'line',
|
|
|
|
data: data,
|
|
|
|
options: {
|
|
|
|
interaction: {
|
|
|
|
intersect: false,
|
|
|
|
mode: 'index',
|
|
|
|
},
|
|
|
|
plugins: {
|
|
|
|
title: {
|
|
|
|
display: true,
|
|
|
|
text: (ctx) => 'Tooltip position mode: ' + ctx.chart.options.plugins.tooltip.position,
|
|
|
|
},
|
|
|
|
}
|
|
|
|
}
|
|
|
|
};
|
|
|
|
// </block:config>
|
|
|
|
|
|
|
|
module.exports = {
|
|
|
|
actions: actions,
|
|
|
|
config: config,
|
|
|
|
};
|
|
|
|
```
|