Created
June 26, 2020 13:02
-
-
Save dexion/ad3086eb83b8d330101e6c8dbcd90802 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!doctype html> | |
| <head> | |
| <title>Chart.JS zoom test</title> | |
| <script src="https://cdn.jsdelivr.net/npm/[email protected]"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/[email protected]"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/[email protected]"></script> | |
| </head> | |
| <body> | |
| <input type="number" id="last_ticks" name="last_ticks" min="1" value="1"/> | |
| <div style="width:75%;"> | |
| <canvas id="myChart"></canvas> | |
| </div> | |
| <script> | |
| function numberRoundDecimal(v, n) { | |
| return Math.round((v + Number.EPSILON) * Math.pow(10, n)) / Math.pow(10, n) | |
| } | |
| Chart.defaults.LineWithLine = Chart.defaults.line; | |
| Chart.controllers.LineWithLine = Chart.controllers.line.extend({ | |
| draw: function(ease) { | |
| Chart.controllers.line.prototype.draw.call(this, ease); | |
| if (this.chart.tooltip._active && this.chart.tooltip._active.length) { | |
| var activePoint = this.chart.tooltip._active[0], | |
| ctx = this.chart.ctx, | |
| prev_ticks = document.getElementById("last_ticks").value || 1, | |
| widthChart = this.chart.scales['x-axis-0'].right - this.chart.scales['x-axis-0'].left, | |
| pieces = this.chart.config.data.labels.length - 1, | |
| widthPiece = widthChart / pieces, | |
| x = activePoint.tooltipPosition().x, | |
| topY = this.chart.scales['y-axis-1'].top, | |
| bottomY = this.chart.scales['y-axis-1'].bottom; | |
| if(x - widthPiece * prev_ticks < this.chart.scales['x-axis-0'].left) { | |
| x = this.chart.scales['x-axis-0'].left; | |
| } | |
| else { | |
| x -= widthPiece * prev_ticks; | |
| } | |
| // draw line | |
| ctx.save(); | |
| ctx.beginPath(); | |
| ctx.moveTo(x, topY); | |
| ctx.lineTo(x, bottomY); | |
| ctx.lineWidth = 2; | |
| ctx.strokeStyle = '#07C'; | |
| ctx.stroke(); | |
| ctx.restore(); | |
| } | |
| } | |
| }); | |
| var ctx = document.getElementById('myChart').getContext('2d'); | |
| var chart = new Chart(ctx, { | |
| // The type of chart we want to create | |
| // type: 'line', | |
| type: 'LineWithLine', | |
| // The data for our dataset | |
| data: { | |
| labels: [1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006,1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006,1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006,1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006,1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006,1591394407, 1591398007, 1591401606, 1591405207, 1591408806, 1591412406, 1591416006], | |
| datasets: [{ | |
| label: 'Set-1', | |
| backgroundColor: 'rgb(255, 99, 132)', | |
| borderColor: 'rgb(255, 99, 132)', | |
| fill: false, | |
| data: [0, 10, 5, 2, 20, 30, 45,0, 10, 5, 2, 20, 30, 45,0, 10, 5, 2, 20, 30, 45,0, 10, 5, 2, 20, 30, 45,0, 10, 5, 2, 20, 30, 45,0, 10, 5, 2, 20, 30, 45], | |
| yAxisID: 'y-axis-1' | |
| }, | |
| { | |
| label: 'Set-2', | |
| backgroundColor: 'rgb(122, 0, 132)', | |
| borderColor: 'rgb(122, 0, 132)', | |
| fill: false, | |
| data: [100, 105, 102, 120, 130, 145, 110,100, 105, 102, 120, 130, 145, 110,100, 105, 102, 120, 130, 145, 110,100, 105, 102, 120, 130, 145, 110,100, 105, 102, 120, 130, 145, 110,100, 105, 102, 120, 130, 145, 110], | |
| yAxisID: 'y-axis-2' | |
| }, | |
| { | |
| label: 'Set-3', | |
| backgroundColor: 'rgb(255, 99, 0)', | |
| borderColor: 'rgb(255, 99, 0)', | |
| fill: false, | |
| data: [1002, 10020, 10030, 10045, 1000, 1010, 1005,1002, 10020, 10030, 10045, 1000, 1010, 1005,1002, 10020, 10030, 10045, 1000, 1010, 1005,1002, 10020, 10030, 10045, 1000, 1010, 1005,1002, 10020, 10030, 10045, 1000, 1010, 1005,1002, 10020, 10030, 10045, 1000, 1010, 1005], | |
| yAxisID: 'y-axis-3' | |
| }] | |
| }, | |
| // Configuration options go here | |
| options: { | |
| responsive: true, | |
| tooltips: { | |
| axis: 'x', | |
| mode: 'index', | |
| intersect: false, | |
| callbacks: { | |
| title: function(tooltipItem, data) { | |
| var title = data.labels[tooltipItem[0].index] || ''; | |
| if (title) { | |
| title = new Date(title * 1000).toLocaleString("en"); | |
| } | |
| return title; | |
| }, | |
| label: function(tooltipItem, data) { | |
| var label = data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index]; | |
| var prev; | |
| var prev_ticks = document.getElementById("last_ticks").value || 1; | |
| if(tooltipItem.index - prev_ticks < 0){ | |
| prev = data.datasets[tooltipItem.datasetIndex].data[0]; | |
| } | |
| else { | |
| prev = data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index-prev_ticks]; | |
| } | |
| percentage = numberRoundDecimal(label*100/prev-100, 3); | |
| label += ` (${ percentage }%)`; | |
| return label; | |
| }, | |
| labelTextColor: function(tooltipItem, chart) { | |
| var label = chart.config.data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index]; | |
| var prev; | |
| var prev_ticks = document.getElementById("last_ticks").value || 1; | |
| if(tooltipItem.index - prev_ticks < 0){ | |
| prev = chart.config.data.datasets[tooltipItem.datasetIndex].data[0]; | |
| } | |
| else { | |
| prev = chart.config.data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index-prev_ticks]; | |
| } | |
| if(prev < label){ | |
| return "green"; | |
| } | |
| if(prev > label){ | |
| return "red"; | |
| } | |
| return "white"; | |
| } | |
| } | |
| }, | |
| hover: { | |
| mode: 'nearest', | |
| intersect: true | |
| }, | |
| stacked: true, | |
| title: { | |
| display: false, | |
| text: 'Chart.js Line Chart - Multi Axis' | |
| }, | |
| scales: { | |
| xAxes: [{ | |
| display: true, | |
| ticks: { | |
| callback: function(value, index, values) { | |
| return new Date(value * 1000).toLocaleString("en"); | |
| } | |
| } | |
| }], | |
| yAxes: [{ | |
| type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance | |
| display: true, | |
| position: 'left', | |
| id: 'y-axis-1', | |
| ticks: { | |
| min: 0.01 | |
| } | |
| }, { | |
| type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance | |
| display: true, | |
| position: 'left', | |
| id: 'y-axis-2', | |
| // grid line settings | |
| gridLines: { | |
| drawOnChartArea: false, // only want the grid lines for one axis to show up | |
| }, | |
| }, { | |
| type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance | |
| display: true, | |
| position: 'right', | |
| id: 'y-axis-3', | |
| // grid line settings | |
| gridLines: { | |
| drawOnChartArea: false, // only want the grid lines for one axis to show up | |
| }, | |
| }], | |
| }, | |
| plugins: { | |
| zoom: { | |
| // Container for pan options | |
| pan: { | |
| // Boolean to enable panning | |
| enabled: false, | |
| // Panning directions. Remove the appropriate direction to disable | |
| // Eg. 'y' would only allow panning in the y direction | |
| // A function that is called as the user is panning and returns the | |
| // available directions can also be used: | |
| // mode: function({ chart }) { | |
| // return 'xy'; | |
| // }, | |
| mode: 'x', | |
| // rangeMin: { | |
| // // Format of min pan range depends on scale type | |
| // // x: null, | |
| // // y: null | |
| // }, | |
| // rangeMax: { | |
| // // Format of max pan range depends on scale type | |
| // // x: null, | |
| // // y: null | |
| // }, | |
| // On category scale, factor of pan velocity | |
| speed: 20, | |
| // Minimal pan distance required before actually applying pan | |
| threshold: 100, | |
| // Function called while the user is panning | |
| onPan: function({chart}) { console.log(`I'm panning!!!`); }, | |
| // Function called once panning is completed | |
| onPanComplete: function({chart}) { console.log(`I was panned!!!`); } | |
| }, | |
| // Container for zoom options | |
| zoom: { | |
| // Boolean to enable zooming | |
| enabled: true, | |
| // Enable drag-to-zoom behavior | |
| drag: true, | |
| // Drag-to-zoom effect can be customized | |
| // drag: { | |
| // borderColor: 'rgba(225,225,225,0.3)' | |
| // borderWidth: 5, | |
| // backgroundColor: 'rgb(225,225,225)', | |
| // animationDuration: 0 | |
| // }, | |
| // Zooming directions. Remove the appropriate direction to disable | |
| // Eg. 'y' would only allow zooming in the y direction | |
| // A function that is called as the user is zooming and returns the | |
| // available directions can also be used: | |
| // mode: function({ chart }) { | |
| // return 'xy'; | |
| // }, | |
| mode: 'x', | |
| rangeMin: { | |
| // Format of min zoom range depends on scale type | |
| // x: null, | |
| // y: null | |
| }, | |
| rangeMax: { | |
| // Format of max zoom range depends on scale type | |
| // x: null, | |
| // y: null | |
| }, | |
| // Speed of zoom via mouse wheel | |
| // (percentage of zoom on a wheel event) | |
| speed: 1, | |
| // Minimal zoom distance required before actually applying zoom | |
| threshold: 2, | |
| // On category scale, minimal zoom level before actually applying zoom | |
| // sensitivity: 3, | |
| // Function called while the user is zooming | |
| onZoom: function({chart}) { console.log(`I'm zooming!!!`); }, | |
| // Function called once zooming is completed | |
| onZoomComplete: function({chart}) { console.log(`I was zoomed!!!`); } | |
| } | |
| } | |
| } | |
| } | |
| }); | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment