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lineChartPlugin.js
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194 lines (142 loc) · 6.48 KB
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var Y_axis_line_plugin = {
id: 'tooltipLine',
beforeDraw: (chart) => {
if (chart.tooltip._active && chart.tooltip._active.length) {
var ctx = chart.ctx;
ctx.save();
var activePoint = chart.tooltip._active[0];
ctx.beginPath();
ctx.setLineDash([5, 15]);
ctx.moveTo(activePoint.element.x, chart.chartArea.top);
ctx.lineTo(activePoint.element.x, activePoint.element.y); // Use activePoint.element.y
ctx.lineWidth = 2;
ctx.strokeStyle = 'grey';
ctx.stroke();
ctx.restore();
ctx.beginPath();
ctx.moveTo(activePoint.element.x, activePoint.element.y);
ctx.lineTo(activePoint.element.x, chart.chartArea.bottom);
ctx.lineWidth = 2;
ctx.strokeStyle = 'rgba(255, 99, 132, 1)'; // Remove spaces within rgba()
ctx.stroke();
ctx.restore();
}
},
};
var CustomLabelShow = {
id: 'CustomLevelShow',
afterDraw: (chart, easing) => {
chart.data.labels = chart.data.labels.map((label, index) => {
return chart.data.datasets[0].labels[index];
});
if(chart.tooltip._active.length){
var activePoint = chart.tooltip._active;
}
var Current_datasetIndex=0;
if (chart.tooltip._active.length) {
chart.tooltip._active.forEach((activePoint, index) => {
Current_datasetIndex = activePoint.datasetIndex;
});
}
if (activePoint) {
var dataPoints = chart.tooltip.dataPoints;
dataPoints.forEach((dataPoint, index) => {
var selected_datapoint_index = dataPoint.dataIndex;
var selected_dataset_id = dataPoint.dataset.id;
var original_labels = dataPoint.dataset.ls;
var flag = 0;
chart.data.datasets.forEach((dataset,index) => {
if (dataset.id === selected_dataset_id && flag === 0) {
var dataset_name = dataset.label;
if (typeof dataset_name === 'string') {
// Split the string into words
var words = dataset_name.split(' ');
if (words.length === 1) {
// Single-word string, take the first 3 characters
dataset_name = dataset_name.slice(0, 3);
} else {
// Multi-word string, take the first character of each word
dataset_name = words.map(word => word[0]).join('');
}
}
var selected_index_data = dataset.data[selected_datapoint_index];
chart.data.labels.forEach((label,index) => {
if(index > selected_datapoint_index) {
var dataPoint = dataset.data[index];
var change_in_percentage = ((dataPoint - selected_index_data) / selected_index_data) * 100;
if (change_in_percentage > 0) {
if (Array.isArray(label)) {
// If the label is already an array, insert the change_in_percentage
label.push(dataset_name + ' : +' + change_in_percentage.toFixed(1) + '%');
} else {
// If the label is a string, create a new array
label = [label, dataset_name + ' : +' + change_in_percentage.toFixed(1) + '%'];
}
} else if (change_in_percentage === 0) {
// If the change is 0, keep the label as is
} else if (change_in_percentage < 1) {
if (Array.isArray(label)) {
// If the label is already an array, insert the change_in_percentage
label.push(dataset_name + ' :' + change_in_percentage.toFixed(1) + '%');
} else {
// If the label is a string, create a new array
label = [label, dataset_name + ' : ' + change_in_percentage.toFixed(1) + '%'];
}
}
chart.data.labels[index] = label;
}else{
chart.data.labels[index] = label;
}
})
chart.options.scales.x.ticks.maxRotation = 90;
chart.options.scales.x.ticks.minRotation = 0;
chart.update();
}
});
});
dataPoints.forEach((dataPoint, index) => {
var sum = 0;
var min = 999999999999999;
var max = 0;
var average = 0;
var selected_datapoint_index = dataPoint.dataIndex;
var selected_dataset_id = dataPoint.dataset.id;
var flag_A = 0;
chart.data.datasets.forEach((dataset,index) => {
if (dataset.id === selected_dataset_id && flag_A === 0) {
flag_A = 1;
var datasetValues = dataset.data;
sum = 0;
min = 999999999999999;
max = 0;
average = 0;
for (let i = selected_datapoint_index; i < datasetValues.length; i++) {
var value = datasetValues[i];
sum += value;
min = Math.min(min, value);
max = Math.max(max, value);
}
//var denominator = datasetValues.length - selected_datapoint_index - 1;
var denominator = datasetValues.length - selected_datapoint_index;
if (denominator === 0) {
average = value;
} else {
average = sum / denominator;
}
dataset.tooltipLabel = 'Sum=' + sum.toFixed(1) + ' :: Min=' + min.toFixed(1) + ' :: Max=' + max.toFixed(1) + ' :: Avg=' + average.toFixed(1);
}
})
// Modify the tooltip content for the tooltips of each dataset
chart.tooltip.options.callbacks.label = (tooltipItem, data) => {
var defaultLabel = tooltipItem.dataset.label + ' : ' + tooltipItem.formattedValue;
var customLabel = tooltipItem.dataset.tooltipLabel;
return defaultLabel + ' :: ' + customLabel;
};
chart.update();
});
}
}
};
var plugins = [Y_axis_line_plugin,CustomLabelShow]
// Render the chart
<Line data={data_object} plugins={plugins} />