echarts柱图点击事件改变图例

ゝ一纸荒年。 2023-02-24 03:43 337阅读 0赞

## 效果图 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3MDB5dw_size_16_color_FFFFFF_t_70]

## 效果图描述 ##

点击柱状图的每根柱子显示对应的值和name及图例对应的总额

## 柱图点击事件 ##

this.dom = echarts.init(this.$refs.dom, theme);
    this.dom.on('click', (event) => {  // 柱图绑定点击事件
      this.$emit('chart_click', event)
    })

## 父组件使用 ##

<template>
        <div class="chart_table_box">
            <Row>
                <Col>
                    <div class="chart_box" style="width: 100%; height: 340px; position: relative;">
                        <ChartBar :option="options" @chart_click="handleChartClick"></ChartBar>
                        <div class="legend_box">
                            <div>{ { countNum}}<span>万</span></div>
                            <div>{ { countName}}</div>
                            <div class="line1"></div>
                            <div class="line2"></div>
                            <div class="kailong"></div>
                        </div>
                    </div>
                </Col>
            </Row>
        </div>
    </template>
    
    <script>
    import lodash from "lodash";
    import ChartBar from "../../common/bar.vue";
    // import { ChartBar } from "_c/charts";
    import {  postTender } from "@/api/business/tender/tenderCom.js";
    export default { 
        components: { 
            ChartBar
        },
        props: { 
            deptCode: {  // 调取接口 所传的参数
                type: String,
                default: () => '60'
            },
            basicData: { 
                // 基本数据 url
                type: Object,
                default: () => ({ 
                    url: ""
                })
            },
        },
        watch: { 
            deptCode: { 
                handler () { 
                    this.getData();
                }
            }
        },
        mounted () { 
            // 根据布局模式，动态设置图例位置
            let layoutType = this.$store.state.app.layoutType;
            switch (layoutType) { 
                case 'layoutA':
                    this.options.legend.left = '80.4%';
                    break;
                case 'layoutB':
                    this.options.legend.left = '83.5%';
                    break;
                default:
                    break;
            }
        },
        data () { 
            return { 
                countName: '总额', // 统计柱图的名称
                countNum: 0, // 统计的总金额
                chartData: [], // 图例用来格式化的数据源
                copyChartData: [], // 拷贝图表的数据，用来动态改变柱图对应的数据结构
                styleList: [ // 样式数组
                    { color: 'rgba(32, 166, 119, 1)'},
                    { color: 'rgba(31, 187, 237, 1)'},
                    { color: 'rgba(247, 177, 60, 1)'}
                ],
                options: { 
                    color: [],
                    grid: { 
                        top: '20%',
                        left: '3%',
                        right: '30%',
                        bottom: '2%',
                        containLabel: true
                    },
                    legend: { 
                        itemHeight: 10,
                        itemWidth: 10,
                        icon: "rect",
                        orient: 'vertical',
                        top: '53%',
                        itemGap: 15,
                        zlevel: 999,
                        z: 999,
                        data: [],
                        formatter: (name) => { 
                            let data = this.chartData;
                            let target;
                            for (let i = 0; i < data.length; i++) { 
                                if (data[i].name === name) { 
                                    target = data[i].value;
                                }
                            }
                            let arr = [
                                '{a|' + name + '}',
                                '{b|' + target + '}',
                                '{c|' + '万}'
                            ]
                            return arr.join('')
                        },
                        textStyle: { 
                            rich: { 
                                a: { 
                                    fontSize: 12,
                                    color: '#333',
                                },
                                b: { 
                                    fontSize: 16,
                                    padding: [0, 0, 0, 10],
                                    // width: 80
                                },
                                c: { 
                                    fontSize: 12
                                }
                            }
                        }
                    },
                    toolbox: { 
                        feature: { 
                            saveAsImage: { 
                                backgroundColor: '#fff'
                            }
                        },
                        right: 20
                    },
                    xAxis: [{ 
                        type: "category",
                        data: [],
                        axisTick: { 
                            show: true,
                            length: 5,
                            lineStyle: { }
                        },
                        axisLabel: { 
                            show: true,
                            interval: 0,
                            rotate: 45,
                            color: '#000',
                            borderWidth: 15, // 加边框，解决最后一个文字加粗加黑问题
                            borderColor: '#fff', // 背景色
                            margin: 15, // 刻度标签与轴线之间的距离
                        }
                    }],
                    yAxis: [{ 
                        type: "value",
                        name: '概算金额(万元)',
                        axisLabel: { 
                            color: '#333'
                        },
                        nameTextStyle: { 
                            color: '#333'
                        }
                    }],
                    series: []
                },
                tableData: []
            }
        },
        methods: { 
            calc (pIndex, cIndex, pLength, cLength) { 
                let cellW = (parseInt((100 / 10) * 100) / 100).toFixed(2);
                if (pIndex === 0) { 
                    return cellW * 2 + "%";
                } else { 
                    switch (cIndex) { 
                        case 0:
                            return cellW * 2 + "%";
                        default:
                            return cellW + "%";
                    }
                }
            },
            getData () {  // 获取接口数据
                let data = { 
                    deptCode: this.deptCode
                };
                postTender(this.basicData.url, data).then(res => { 
                    const jsonData = res.data;
                    if (jsonData.status === 1 && jsonData.code === 200 && !lodash.isEmpty(jsonData.data)) { 
                        this.tableData = jsonData.data.tableData; // 表格数据
                        let { data, xAxis, deptSum} = jsonData.data.chartsData;
                        let legendData = lodash.cloneDeep(jsonData.data.chartData);
    
                        // 动态设置图例颜色
                        if (legendData.length > 0) { 
                            legendData.forEach((item, index) => { 
                                item.textStyle = this.styleList[index];
                            })
                        }
    
                        this.setOptionsColor(); // 设置调色盘颜色列表
    
                        this.options.legend.data =  legendData; // 初始化图例及总额数据、名称
                        this.countNum = (jsonData.data.totalSum ? jsonData.data.totalSum : 0);
                        this.countName = '总额';
    
                        this.chartData = legendData;
                        this.options.xAxis[0].data = xAxis;
                        this.copyChartData = lodash.cloneDeep(data); // 拷贝图表数据用来动态改变柱图数据结构
                        let arr = [...data];
                        arr.map((item, index) => { 
                            item.type = "bar";
                            item.stack = '总量';
                            item.barWidth = "15";
                            return item;
                        });
                        this.options.series = arr;
                    }
                })
            },
            handleChartClick (event) {  // 获取柱图的点击事件
                this.countName = event.name;
                this.countNum = event.value;
                let dataIndex = event.dataIndex;
    
                let arr = []; // 重新组装不同柱子对应的数据结构
    
                this.copyChartData.forEach((ele, index) => { 
                    arr.push({ 
                        name: ele.name,
                        value: ele.data[dataIndex],
                        textStyle: this.styleList[index]
                    })
                });
                // 重新设置图例与formatter
                this.options.legend.data =  arr;
                this.chartData =  arr;
            },
            setOptionsColor () {  // 调色盘颜色列表
                let arr = [];
                this.styleList.forEach(item => { 
                    arr.push(item.color)
                })
                this.options.color = arr;
            }
        }
    }
    </script>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l3MDB5dw_size_16_color_FFFFFF_t_70]: /images/20230209/7489f1a003cc42f1895c856c77c5f04e.png