<script setup name="BaseChart">
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import * as echarts from "echarts";
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import "./transparent";
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import { onMounted, onBeforeUnmount, ref, nextTick } from "vue";
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import eventBus from "@/utils/eventBus";
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let chart_instance = null;
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let exportChart_instance = null;
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const chart = ref(null);
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const exportChart = ref(null);
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const emit = defineEmits(["click", "update:fullFlag"]);
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const props = defineProps({
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fullFlag: {
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type: Boolean,
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default: false,
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}
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});
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const fullScreenFlag = ref(props.fullFlag);
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onMounted(() => {
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console.log('base mounted',chart.value, '=============');
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// chart_instance.value = echarts.init(chart.value, "transparent");
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chart_instance = echarts.init(chart.value, "transparent");
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exportChart_instance = echarts.init(exportChart.value, "transparent");
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nextTick(() => {
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chart_instance.resize();
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});
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window.addEventListener("resize", resize);
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eventBus.on("toggleSiteList", () => {
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console.log('toggleSiteList', '=============');
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setTimeout(() => {
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resize();
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// 因为过渡设置了0.5s,所以需要等待0.5s后再resize
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}, 500);
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});
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});
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onBeforeUnmount(() => {
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window.removeEventListener("resize", resize);
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eventBus.off("toggleSiteList");
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dispose();
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});
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function getChart() {
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return chart_instance;
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}
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function setOption(option) {
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if (chart_instance) {
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chart_instance.setOption(option);
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}
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}
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function fullScreen() {
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fullScreenFlag.value = !fullScreenFlag.value;
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emit("update:fullFlag", fullScreenFlag.value);
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nextTick(() => {
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resize();
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});
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}
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function getDataURL() {
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let base64 = "";
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if (exportChart_instance) {
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let option = chart_instance.getOption();
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option.xAxis[0].axisLine.lineStyle = {
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color: "#000",
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};
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option.xAxis[0].axisLabel.textStyle = option.xAxis[0].axisLabel.textStyle || {};
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option.xAxis[0].axisLabel.textStyle.color = "#000";
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option.yAxis[0].axisLine.lineStyle = {
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color: "#000",
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};
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option.yAxis[0].axisLabel.textStyle = option.yAxis[0].axisLabel.textStyle || {};
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option.yAxis[0].axisLabel.textStyle.color = "#000";
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option.animation = false;
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exportChart_instance.setOption(option);
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base64 = exportChart_instance.getDataURL({
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pixelRatio: 1,
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backgroundColor: "#fff",
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});
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}
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return base64;
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}
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function resize() {
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if (chart_instance) {
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chart_instance.resize();
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}
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}
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function dispose() {
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disposeChart(chart_instance);
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disposeChart(exportChart_instance);
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}
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function disposeChart(chart) {
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if (chart) {
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chart.dispose(); // 销毁实例
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}
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}
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function handleClick() {
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emit("click", true);
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}
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defineExpose({
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getChart,
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setOption,
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getDataURL,
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});
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</script>
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<template>
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<div
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class="e-chart-root"
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:class="{ 'full-screen': fullScreenFlag }"
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@click="handleClick"
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@dblclick="fullScreen"
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>
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<div class="e-chart-container">
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<div class="e-chart" ref="chart"></div>
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<slot name="tools"></slot>
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</div>
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<div class="export-chart-wrapper">
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<div class="export-chart" ref="exportChart"></div>
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</div>
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</div>
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</template>
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<style scoped>
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.e-chart-root {
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position: relative;
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}
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/* chart wrapper css */
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.e-chart-root,
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.e-chart {
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height: 100%;
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box-sizing: border-box;
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}
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.e-chart-container {
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position: absolute;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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box-sizing: border-box;
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}
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.e-chart-root.full-screen .e-chart-container {
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position: fixed;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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background-size: 100% 100%;
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z-index: 9999;
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}
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/* export chart wrapper css */
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.export-chart-wrapper {
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position: relative;
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width: 0;
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height: 0;
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overflow: hidden;
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}
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.export-chart {
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position: absolute;
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width: 600px;
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height: 400px;
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}
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</style>
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