#散布 - 多軸

const config = {
  type: 'scatter',
  data: data,
  options: {
    responsive: true,
    plugins: {
      legend: {
        position: 'top',
      },
      title: {
        display: true,
        text: 'Chart.js Scatter Multi Axis Chart'
      }
    },
    scales: {
      y: {
        type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
        position: 'left',
        ticks: {
          color: Utils.CHART_COLORS.red
        }
      },
      y2: {
        type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
        position: 'right',
        reverse: true,
        ticks: {
          color: Utils.CHART_COLORS.blue
        },
        grid: {
          drawOnChartArea: false // only want the grid lines for one axis to show up
        }
      }
    }
  },
};

const DATA_COUNT = 7;
const NUMBER_CFG = {count: DATA_COUNT, rmin: 1, rmax: 1, min: -100, max: 100};
const data = {
  datasets: [
    {
      label: 'Dataset 1',
      data: Utils.bubbles(NUMBER_CFG),
      borderColor: Utils.CHART_COLORS.red,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
      yAxisID: 'y',
    },
    {
      label: 'Dataset 2',
      data: Utils.bubbles(NUMBER_CFG),
      borderColor: Utils.CHART_COLORS.orange,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.orange, 0.5),
      yAxisID: 'y2',
    }
  ]
};

const actions = [
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = Utils.bubbles({count: DATA_COUNT, rmin: 1, rmax: 1, min: -100, max: 100});
      });
      chart.update();
    }
  },
  {
    name: 'Add Dataset',
    handler(chart) {
      const chartData = chart.data;
      const dsColor = Utils.namedColor(chartData.datasets.length);
      const newDataset = {
        label: 'Dataset ' + (chartData.datasets.length + 1),
        backgroundColor: Utils.transparentize(dsColor, 0.5),
        borderColor: dsColor,
        data: Utils.bubbles({count: DATA_COUNT, rmin: 1, rmax: 1, min: -100, max: 100}),
      };
      chart.data.datasets.push(newDataset);
      chart.update();
    }
  },
  {
    name: 'Add Data',
    handler(chart) {
      const chartData = chart.data;
      if (chartData.datasets.length > 0) {
        for (let index = 0; index < chartData.datasets.length; ++index) {
          chartData.datasets[index].data.push(Utils.bubbles({count: 1, rmin: 1, rmax: 1, min: -100, max: 100})[0]);
        }
        chart.update();
      }
    }
  },
  {
    name: 'Remove Dataset',
    handler(chart) {
      chart.data.datasets.pop();
      chart.update();
    }
  },
  {
    name: 'Remove Data',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data.pop();
      });
      chart.update();
    }
  }
];