使用ChartJS在条形图中进行分页 [英] Pagination in Bar chart using ChartJS

问题描述

我正在使用chartJS使用条形图显示一些数据. chartJ存在一些问题.当我必须提交大量数据(例如100个或更多数据字段)并且标签具有持久标签时，它看起来就很难看.

I am using chartJS for display some data with Bar Chart. there are some issues with chartJs. When i have to much data-filed for example 100 or more data-field and it have long lasting label its looks like ugly.

如何配置条形图?

这是我的条形图屏幕截图

here is my bar chart screenshot

这是我的字段

在上面的示例中，我有100个数据字段，我可以对这个条形图进行分页吗?

in above example i have 100 data-filed, can i paginate this bar-chart ?

这是我的代码

var lbl = [];
var dt = [];
for(var i = 1;i<=100;i++){
 lbl.push("this_is_my_lable_name_"+i);
}
for(var i = 1;i<=100;i++){
  dt.push(Math.floor((Math.random() * 100) + 1));
}
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: lbl,
        datasets: [{
            label: '# of Votes',
            data: dt,
            backgroundColor: [
                'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                'rgba(255, 206, 86, 0.2)',
                'rgba(75, 192, 192, 0.2)',
                'rgba(153, 102, 255, 0.2)',
                'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
                'rgba(255,99,132,1)',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero:true
                }
            }]
        }
    }
});

推荐答案

您可以尝试以下解决方案来考虑图表滚动:

You can try this solution to consider the chart scroll like this:

为y轴克隆另一个画布，以便在滚动时只有条会出现移动

Clone a different canvas for y axis so that when you scroll then only bars will appear to move

为y轴添加画布

 <canvas id="myChartAxis" height="600" width="0"></canvas>

现在克隆轴

 var sourceCanvas = myLiveChart.chart.canvas;
 var copyWidth = myLiveChart.scales['y-axis-0'].width - 10;
 var copyHeight = myLiveChart.scales['y-axis-0'].height + myLiveChart.scales['y-axis-0'].top + 10;
 var targetCtx = document.getElementById("myChartAxis").getContext("2d");
 targetCtx.canvas.width = copyWidth;
 targetCtx.drawImage(sourceCanvas, 0, 0, copyWidth, copyHeight, 0, 0, copyWidth, copyHeight);

有关演示的信息，请参见 FIDDLE

For a Demo see this FIDDLE

为获得更好的可视化效果，最好避免在x轴上标注标签，并通过工具提示直观地显示此信息

For better visualization its better to avoid labels in x axis and show this info intuitive via tool tip anyhow

这篇关于使用ChartJS在条形图中进行分页的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！