echarts實作比較炫的儀表盤

前言：

        echarts圖形

效果圖：

實作源碼：

let value = 40;
option = {
    backgroundColor:"#061740",
    title: {
        text: '{a|'+ value +'}{c|%}'+'\n'+'{b|資料管理}',
        x: 'center',
        y: 'center',
        textStyle: {
            rich:{
                a: {
                    fontSize: 48,
                    color: '#29EEF3'
                },
                b:{
                    fontSize: 28,
                    color: '#ffffff',
                    padding:[0,10]
                },
                
                c: {
                    fontSize: 20,
                    color: '#ffffff',
                    // padding: [5,0]
                }
            }
        }
    },
    legend: {
        type: "plain",
        orient: "vertical",
        right: 0,
        top: "10%",
        align: "auto",
        data: [{
            name: '漲價後沒吃過',
            icon: "circle"
        }, {
            name: '天天吃',
            icon: "circle"
        }, {
            name: '三五天吃一次',
            icon: "circle"
        }, {
            name: '半個月吃一次',
            icon: "circle"
        }],
        textStyle: {
            color: "white",
            fontSize: 16,
            padding: [10, 1, 10, 0]
        },
        selectedMode:false
    },
    series: [ 
        //外面的線
         {
            name: "ring5",
            type: 'custom',
            coordinateSystem: "none",
            renderItem: function(params, api) {
                return {
                    type: 'arc',
                    shape: {
                        cx: api.getWidth() / 2,
                        cy: api.getHeight() / 2,
                        r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.6,//線的位置
                        startAngle: 0,//開始的地方
                        endAngle: 180//結束的地方
                    },
                    style: {
                        stroke: "#018373",
                        fill: "transparent",
                        lineWidth: 1.5
                    },
                    silent: true
                };
            },
            data: [0]
        },
        //裡面的線
         {
            name: "ring5",
            type: 'custom',
            coordinateSystem: "none",
            renderItem: function(params, api) {
                return {
                    type: 'arc',
                    shape: {
                        cx: api.getWidth() / 2,
                        cy: api.getHeight() / 2,
                        r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.43,//線的位置
                        startAngle: 0,//開始的地方
                        endAngle: 180//結束的地方
                    },
                    style: {
                        stroke: "#018373",
                        fill: "transparent",
                        lineWidth: 1.5
                    },
                    silent: true
                };
            },
            data: [0]
        },
        //環形圖主體
        {
            name: '吃豬肉頻率',
            type: 'pie',
            radius: ['58%', '45%'],
            silent: true,
            clockwise: true,
            startAngle: 90,
            z: 0,
            zlevel: 0,
            label: {
                normal: {
                    position: "center",

                }
            },
            data: [{
                    value: value,
                    name: "",
                    itemStyle: {
                        normal: {
                            color: { // 完成的圓環的顔色
                                colorStops: [{
                                    offset: 0,
                                    color: '#018F7E' // 0% 處的顔色
                                }, {
                                    offset: 1,
                                    color: '#018F7E' // 100% 處的顔色
                                }]
                            },
                        }
                    }
                },
                {
                    value: 100-value,
                    name: "",
                    label: {
                        normal: {
                            show: false
                        }
                    },
                    itemStyle: {
                        normal: {
                            color: "#01423B"
                        }
                    }
                }
            ]
        },
        //小格子
        {
            name: "",
            type: "gauge",
            radius: "58%",
            center: ['50%', '50%'],
            startAngle: 0,
            endAngle: 359.9,
            splitNumber: 128,//改變小格子寬度
            hoverAnimation: true,
            axisTick: {
                show: false
            },
            splitLine: {
                length: 60,
                lineStyle: {
                    width: 5,
                    color: "#061740",//改變小格子的線顔色
                }
            },
            axisLabel: {
                show: false
            },
            pointer: {
                show: false
            },
            axisLine: {
                lineStyle: {
                    opacity: 0
                }
            },
            detail: {
                show: false
            },
            data: [{
                value: 0,
                name: ""
            }]
        },
        
    ]
};

           

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