我遇到了调整chart.js画布大小的问题。我将画布高度设置为160,以便在更宽的屏幕上看起来好看,但是在小屏幕上我需要将高度更改为300,以保持其纵横比并且不会显得拥挤。
此外,我想在条形图上添加一个单击事件,该事件可以将其相应标签的月份传递给链接。
谢谢。以下是我的代码:
此外,我想在条形图上添加一个单击事件,该事件可以将其相应标签的月份传递给链接。
谢谢。以下是我的代码:
<div>
<canvas id="chart1" width="500" height="300"></canvas>
</div>
<script>
var barLabel = <?php echo json_encode(array_reverse( $ch1_arrDate)); ?>;
var dataVal1 = <?php echo json_encode(array_reverse( $ch1_arrRevenue_conf)); ?>;
var barData = {
labels: barLabel,
datasets: [
{
label: 'Confirmed Revenue',
backgroundColor: 'yellowgreen',
data: dataVal1,
},
]
};
var barOptions = {
responsive: true,
maintainAspectRatio: true
}
var ctx = document.getElementById("chart1").getContext("2d");
if($(window).width()>748)
ctx.canvas.height = 160;
else
ctx.canvas.height = 300;
var chartDisplay = new Chart(ctx, {
type: 'bar',
data: barData,
options: barOptions
});
$("#chart1").click(
function(evt){
//supposed to when clicked goes to a linked href passing the month of the selected bar
// e.g dummy.php?month_year=vardate
});
window.onresize = function() {
//the window.onresize works but i dont know how to resize the canvas while maintaining the aspect ratio.
if($(window).width()>748)
ctx.canvas.height = 160;
else
ctx.canvas.height = 300;
chartDisplay.resize();
}
</script>
(涉及IT技术)