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VisualizaçõesChart.js: how to order the tool tips in the graph
I generate a graph where I have 3 groups of data:
- bottom
- middle
- top
Each bar has the top values at the top of the bar, then the middle value and then the bottom value.
When Chart.js displays the tooltip, I have first the bottom value, then the middle and the the top. So, it is the opposite of the order in the bar.
To display the values I added this code
var stackedBarChartOptions = {
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'label',
callbacks: {
label: function (tooltipItem, data) {
return data.datasets[tooltipItem.datasetIndex].label + ": " +
tooltipItem.yLabel;
}
}
}
}
Is it possible to order the list of tool tips?
·
Juan Pablo Isaza
1 Respostas
Responde à pergunta0
in the tooltip label callback, we can choose any index to display.
in your callback, you're displaying the index passed to the callback.
tooltipItem.datasetIndex
instead, let's display the reverse order...
data.datasets.length - 1 - tooltipItem.datasetIndex
but we will also have to add the callback for labelColor,
to display the correct color box for the specific label.
see following working snippet...
var chart_canvas = document.getElementById('myChart');
var stackedLine = new Chart(chart_canvas, {
type: 'bar',
data: {
labels: ['A'],
fill: true,
datasets: [
{
label: 'Low',
data: [67.8],
backgroundColor: '#D6E9C6'
},
{
label: 'Moderate',
data: [20.7],
backgroundColor: '#FAEBCC'
},
{
label: 'High',
data: [11.4],
backgroundColor: '#EBCCD1'
}
]
},
options: {
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'label',
callbacks: {
labelColor: function (tooltipItem, data) {
return {backgroundColor: data.data.datasets[data.data.datasets.length - 1 - tooltipItem.datasetIndex].backgroundColor};
},
label: function (tooltipItem, data) {
return data.datasets[data.datasets.length - 1 - tooltipItem.datasetIndex].label + ": " + data.datasets[data.datasets.length - 1 - tooltipItem.datasetIndex].data[tooltipItem.index];
}
}
},
scales: {
xAxes: [{
stacked: true
}],
yAxes: [{
stacked: true
}]
}
}
});<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.min.js"></script>
<canvas id="myChart"></canvas>
·
Juan Pablo Isaza
Relatório
Responde à pergunta