dashboard/components/graph/AspectPreserver.vue

69 lines
1.4 KiB
Vue

<script>
/*
Wrap d3 SVG charts in styled divs which preserve given aspect ratio
*/
import * as d3 from 'd3';
export default {
props: {
aspectRatio: {
type: Array,
default: () => [4, 3]
}
},
data() {
return { isMounted: false };
},
computed: {
graphWidth() {
if (!this.isMounted) {
return 0;
}
return d3.select(this.$refs.outer).node().getBoundingClientRect().width;
},
graphHeight() {
if (!this.isMounted) {
return 0;
}
return d3.select(this.$refs.inner).node().getBoundingClientRect().height;
},
},
// track when component is mounted to use d3 DOM reference
mounted() {
this.isMounted = true;
},
};
</script>
<template>
<div ref="outer" class="aspect--outer">
<div ref="inner" class="aspect--inner" :style="{paddingBottom: 100 * aspectRatio[1]/aspectRatio[0] + '%' }">
<slot class="aspect--svg" :graphWidth="graphWidth" :graphHeight="graphHeight"></slot>
</div>
</div>
</template>
<style lang = 'scss' scoped>
.aspect{
&--outer{
width: 100%;
height: 100%;
position: relative;
}
&--inner{
overflow: hidden;
height: 0;
position: relative;
}
&--svg {
position: absolute;
height: 100%;
width: 100%;
left: 0;
top: 0;
}
}
</style>