<template>
	<view class="content">
		<view @click="echarts.onClick" :prop="option" :change:prop="echarts.updateEcharts" id="echarts" class="echarts">
		</view>

	</view>
</template>

<script>
	export default {
		name: 'chart',
		props: {

		},
		data() {
			return {
				option: {
					tooltip: {
						formatter: "{a} <br/>{b} : {c}%"
					},
					toolbox: {

						feature: {
							restore: {},
							saveAsImage: {}
						}
					},
					series: [{
						name: '业务指标',
						type: 'gauge',
						detail: {
							formatter: '{value}%'
						},
						data: [{
							value: 50,
							name: '完成率'
						}],
						axisLine: {
							show: true,
							lineStyle: {
								color: [
									[1, new echarts.graphic.LinearGradient(0, 0, 1, 0, [{
											offset: 0.1,
											color: "#FFC600"
										},
										{
											offset: 0.6,
											color: "#30D27C"
										},
										{
											offset: 1,
											color: "#0B95FF"
										}
									])]
								]

							}
						}

					}]
				}


			}
		},
		onLoad() {

		},
		methods: {
			changeOption() {
				const data = this.option.series[0].data
				// 随机更新示例数据
				data.forEach((item, index) => {
					data.splice(index, 1, Math.random() * 40)
				})
			},
			onViewClick(options) {
				console.log(options)
			}
		}
	}
</script>

<script module="echarts" lang="renderjs">
	let myChart
	export default {
		mounted() {
			if (typeof window.echarts === 'function') {
				this.initEcharts()
			} else {
				// 动态引入较大类库避免影响页面展示
				const script = document.createElement('script')
				// view 层的页面运行在 www 根目录，其相对路径相对于 www 计算
				script.src = '/static/echarts.min.js'
				script.onload = this.initEcharts.bind(this)
				document.head.appendChild(script)
			}
		},
		methods: {
			//串联引入，保证文件加载顺序,在onload 方法内引入下一个js ,在最后一个onload方法内进行图表初始化
			// init() {
			// 	// 动态引入较大类库避免影响页面展示
			// 	const script = document.createElement('script')
			// 	script.src = 'static/china.js'
			// 	script.onload = this.initEcharts.bind(this)
			// 	document.head.appendChild(script)
			// },

			initEcharts() {

				myChart = echarts.init(document.getElementById('echarts'))
				// 观测更新的数据在 view 层可以直接访问到
				myChart.setOption(this.option)
			},
			updateEcharts(newValue, oldValue, ownerInstance, instance) {
				// 监听 service 层数据变更
				myChart.setOption(newValue)
			},
			onClick(event, ownerInstance) {
				// 调用 service 层的方法
				ownerInstance.callMethod('onViewClick', {
					test: 'test'
				})
			}
		}
	}
</script>

<style>
	.content {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
	}

	.echarts {
		width: 100%;
		height: 400rpx;

	}
</style>
