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March 1, 2021 12:39
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javascript-bubbleを使った図の描画、イベントハンドラを取り出すサンプル
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| </head> | |
| <body> | |
| <!-- 参考--> | |
| <!-- https://tobiasahlin.com/blog/chartjs-charts-to-get-you-started/#10-bubble-chart --> | |
| <h2>参考サイトのbubble-chartにイベントを追加した例</h2> | |
| <canvas id="bubble-chart" style="min-height: 250px; height: 250px; max-height: 70%; max-width: 70%;"></canvas> | |
| <div id="kakusi" hidden> | |
| <button>なにかクリックしたから、このボタンを表示するよ</button> | |
| </div> | |
| <p>参考サイト</p> | |
| <a href="https://tobiasahlin.com/blog/chartjs-charts-to-get-you-started/#10-bubble-chart">10 Chart.js example charts to get you started</a> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.min.js"></script> | |
| <script> | |
| kakusi = document.getElementById("kakusi"); | |
| new Chart(document.getElementById("bubble-chart"), { | |
| type: 'bubble', //「scatter」でも良いが、「bubble」だと大きさも表現できるのでbubbleの方が良さげ | |
| data: { | |
| labels: "Africa", | |
| datasets: [ | |
| { | |
| label: ["China"], | |
| backgroundColor: "rgba(255,221,50,0.2)", | |
| borderColor: "rgba(255,221,50,1)", | |
| data: [{ | |
| x: 21269017, | |
| y: 5.245, | |
| r: 15 | |
| }, | |
| { | |
| x: 11269017, | |
| y: 5.245, | |
| r: 15 | |
| }] | |
| }, { | |
| label: ["Denmark"], | |
| backgroundColor: "rgba(60,186,159,0.2)", | |
| borderColor: "rgba(60,186,159,1)", | |
| data: [{ | |
| x: 258702, | |
| y: 7.526, | |
| r: 10 | |
| }] | |
| }, { | |
| label: ["Germany"], | |
| backgroundColor: "rgba(0,0,0,0.2)", | |
| borderColor: "#000", | |
| data: [{ | |
| x: 3979083, | |
| y: 6.994, | |
| r: 15 | |
| }] | |
| }, { | |
| label: ["Japan"], | |
| backgroundColor: "rgba(193,46,12,0.2)", | |
| borderColor: "rgba(193,46,12,1)", | |
| data: [{ | |
| x: 4931877, | |
| y: 5.921, | |
| r: 15 | |
| }] | |
| } | |
| ] | |
| }, | |
| options: { | |
| title: { | |
| display: true, | |
| text: 'Predicted world population (millions) in 2050' | |
| }, scales: { | |
| yAxes: [{ | |
| scaleLabel: { | |
| display: true, | |
| labelString: "Happiness" | |
| } | |
| }], | |
| xAxes: [{ | |
| scaleLabel: { | |
| display: true, | |
| labelString: "GDP (PPP)" | |
| } | |
| }] | |
| }, | |
| events: ['click'], | |
| onHover: function(e, el) { | |
| //onClickだけでも良いかも | |
| //if (! el || el.length === 0) return; | |
| //console.log('onHover : label ' + el[0]._model.label); | |
| }, | |
| onClick: function (e, el) { | |
| if (! el || el.length === 0) return; | |
| //console.log('onClick : label ' + el[0]._model); | |
| //以下の記述でオブジェクト全体をみることができるよ | |
| console.dir(el); | |
| var s = "_datasetIndex=" + el[0]._datasetIndex + " _lindex=" + el[0]._index + " labels=" + el[0]._chart | |
| alert(s) | |
| //$("#kakusi").css("display", "none"); | |
| kakusi.style.display = "block"; | |
| } | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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