use-echarts.ts
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import type { EChartsOption } from 'echarts';
import type { Ref } from 'vue';
import type { Nullable } from '@vben/types';
import type EchartsUI from './echarts-ui.vue';
import { computed, nextTick, watch } from 'vue';
import { usePreferences } from '@vben/preferences';
import {
tryOnUnmounted,
useDebounceFn,
useResizeObserver,
useTimeoutFn,
useWindowSize,
} from '@vueuse/core';
import echarts from './echarts';
type EchartsUIType = typeof EchartsUI | undefined;
type EchartsThemeType = 'dark' | 'light' | null;
function useEcharts(chartRef: Ref<EchartsUIType>) {
let chartInstance: echarts.ECharts | null = null;
let cacheOptions: EChartsOption = {};
const { isDark } = usePreferences();
const { height, width } = useWindowSize();
const resizeHandler: () => void = useDebounceFn(resize, 200);
const getChartEl = (): HTMLElement | null => {
const refValue = chartRef?.value as unknown;
if (!refValue) return null;
if (refValue instanceof HTMLElement) {
return refValue;
}
const maybeComponent = refValue as { $el?: HTMLElement };
return maybeComponent.$el ?? null;
};
const isElHidden = (el: HTMLElement | null): boolean => {
if (!el) return true;
return el.offsetHeight === 0 || el.offsetWidth === 0;
};
const getOptions = computed((): EChartsOption => {
if (!isDark.value) {
return {};
}
return {
backgroundColor: 'transparent',
};
});
const initCharts = (t?: EchartsThemeType) => {
const el = chartRef?.value?.$el;
if (!el) {
return;
}
chartInstance = echarts.init(el, t || isDark.value ? 'dark' : null);
return chartInstance;
};
const renderEcharts = (
options: EChartsOption,
clear = true,
): Promise<Nullable<echarts.ECharts>> => {
cacheOptions = options;
const currentOptions = {
...options,
...getOptions.value,
};
return new Promise((resolve) => {
if (chartRef.value?.offsetHeight === 0) {
useTimeoutFn(async () => {
resolve(await renderEcharts(currentOptions));
}, 30);
return;
}
nextTick(() => {
const el = getChartEl();
if (isElHidden(el)) {
useTimeoutFn(async () => {
resolve(await renderEcharts(currentOptions));
}, 30);
return;
}
useTimeoutFn(() => {
if (!chartInstance) {
const instance = initCharts();
if (!instance) return;
}
clear && chartInstance?.clear();
chartInstance?.setOption(currentOptions);
resolve(chartInstance);
}, 30);
});
});
};
function resize() {
const el = getChartEl();
if (isElHidden(el)) {
return;
}
chartInstance?.resize({
animation: {
duration: 300,
easing: 'quadraticIn',
},
});
}
watch([width, height], () => {
resizeHandler?.();
});
useResizeObserver(chartRef as never, resizeHandler);
watch(isDark, () => {
if (chartInstance) {
chartInstance.dispose();
initCharts();
renderEcharts(cacheOptions);
resize();
}
});
tryOnUnmounted(() => {
// 销毁实例，释放资源
chartInstance?.dispose();
});
return {
renderEcharts,
resize,
getChartInstance: () => chartInstance,
};
}
export { useEcharts };
export type { EchartsUIType };