背景:因为数据不固定 高度写死导致数据显示不全,所以图表高度要根据内容计算
实现代码如下:
```
```
data() {
return {
chartHeight: 0,
deptData: {},
yAxisData: [], // 用于y轴的数据
.......//其它数据
}
}
```
```
watch: {
yAxisData(newData) {
this.chartHeight = newData.length * 30 + 20;
this.$nextTick(() => {
this.drawChart();
const chart = echarts.init(document.getElementById("business-bars"));
chart.resize()
});
},
},
mounted() {
this.init(); // 初始化图表数据
this.$nextTick(() => {
//this.drawChart(); // 绘制图表
});
},
思路:通过监听’yAxisData’的变化,来动态地计算和调整图表的整体高度
重点:1、在 Watch 属性的回调函数内调用了 drawChart() 方法,确保图表的高度在动态计算后被正确应用,
在 Watch 属性中通过 this.$nextTick() 来调用 drawChart() 方法,以确保在图表高度更新后再进行绘制操作
watch: {
yAxisData(newData) {
this.chartHeight = newData.length * 17 + 20;
this.$nextTick(() => {
this.drawChart();
const chart = echarts.init(document.getElementById("business-bars"));
chart.resize()
});
}
},
2、在 drawChart() 方法中,确保在绘制图表之前,已经将图表容器的实际高度设置为计算后的高度
methods: {
drawChart() {
const chart = echarts.init(document.getElementById("business-bars"));
const chartContainer = document.getElementById("business-bars");
chartContainer.style.height = this.chartHeight + "px";
const option = {
barWidth: 20,
barGap: "30%", // 调整同一类目上的柱子间隔
barCategoryGap: "20%", // 调整不同类目的柱子间隔
// dataZoom: [
// {
// type: 'slider',
// yAxisIndex: 0, // y轴索引
// startValue: 0, // 起始数据索引
// endValue: 5, // 结束数据索引
// zoomLock: true // 禁用滑动条
// }
// ],
color: [
"rgba(27, 158, 255, 1)",
"rgba(0, 210, 233, 1)",
"rgba(253, 200, 79, 1)",
],
tooltip: {
trigger: "axis",
axisPointer: {
type: "shadow",
},
},
legend: {
bottom: 20,
itemGap: 15,
itemWidth: 10,
itemHeight: 10,
},
grid: {
left: "2%",
right: "4%",
top: "2%",
containLabel: true,
},
xAxis: {
type: "value",
splitLine: {
show: false,
},
},
yAxis: {
type: "category",
data: this.yAxisData,
axisLine: {
show: false,
},
axisTick: {
show: false,
interval: 0,
},
axisLabel: {
interval: 0,
formatter: function (value) {
if (value.length > 5) {
return `${value.substr(0, 5)}...`;
}
return value;
},
},
},
series: this.seriesData,
};
const that = this;
chart.off("click");
chart.on("click", function (param) {
const index = PROJECT_STATE_ENUM.findIndex(
(item) => item.name === param.seriesName
);
that.value = param.seriesName;
that.dept = param.name;
if (index > -1) {
let time;
if (that.current === "all") {
time = 0;
} else if (that.current === "week") {
time = 1;
} else if (that.current === "month") {
time = 2;
} else if (that.current === "year") {
time = 3;
}
that.$emit("query", {
value: PROJECT_STATE_ENUM[index].code,
time: time,
dept: param.name,
});
}
});
chart.setOption(option);
// 自适应窗口大小
window.addEventListener("resize", function () {
chart.resize();
});
},
}
实现效果如下:按照内容高度 撑开全部展示
如果左侧高度想固定 超出部分右侧滚动条上下滚动的形式展示 则在echarts配置中添加datazoom属性
// dataZoom: [
// {
// type: 'slider',
// yAxisIndex: 0, // y轴索引
// startValue: 0, // 起始数据索引
// endValue: 5, // 结束数据索引
// zoomLock: true // 禁用滑动条
// }
// ],