Vue3实现面板分割

<template>
  <div class="g-split" ref="gSplit">
    <!-- 水平方向 -->
    <div class="horizontal" v-if="showHorizontal">
      <div class="left-panel position" :style="horizontalLeftPanel">
        <slot name="left"></slot>
      </div>
      <div
        class="horizontal-trigger-panel position"
        :style="horizontaltriggerPanel"
        ref="horizontalTriggerPanel"
      >
        <slot name="trigger" v-if="$slots.trigger"></slot>
        <div class="trigger-content-default-wrap" v-else>
          <div class="trigger-content">
            <i class="trigger-bar" v-for="n in 7" :key="n"></i>
          </div>
        </div>
      </div>
      <div class="right-panel position" :style="horizontalRightPanel">
        <slot name="right"></slot>
      </div>
    </div>
    <!-- 垂直方向 -->
    <div class="vertical" v-if="showVertical">
      <div class="top-panel position" :style="verticalTopPanel">
        <slot name="top"></slot>
      </div>
      <div
        class="vertical-trigger-panel position"
        :style="verticaltriggerPanel"
        ref="verticalTriggerPanel"
      >
        <slot name="trigger" v-if="$slots.trigger"></slot>
        <div class="trigger-content-default-wrap" v-else>
          <div class="trigger-content">
            <i class="trigger-bar" v-for="n in 7" :key="n"></i>
          </div>
        </div>
      </div>
      <div class="bottom-panel position" :style="verticalBottomPanel">
        <slot name="bottom"></slot>
      </div>
    </div>
  </div>
</template>
<script setup>
import { ref, computed, onMounted } from 'vue';
// 注意：页面偏移量单位统一使用百分比计算
const props = defineProps({
  value: {
    type: [String, Number],
    default: 0.5,
  },
  mode: {
    type: String,
    validator(value) {
      return ["horizontal", "vertical"].includes(value);
    },
    default: "horizontal",
  },
  min: {
    type: [String, Number],
    default: 0.1,
  },
  max: {
    type: [String, Number],
    default: 0.9,
  },
});
import { defineEmits } from 'vue';
const emit = defineEmits(['onMoveStart', 'onMoving', 'onMoveEnd']);
const gSplit = ref(null);
const horizontalTriggerPanel = ref(null);
const verticalTriggerPanel = ref(null);
const left = ref(props.value);
const top = ref(props.value);
const gSplitWidth = ref(0);
const gSplitHeight = ref(0);
const horizontalTriggerPanelWidth = ref(0);
const verticalTriggerPanelHeight = ref(0);
const showHorizontal = computed(() => props.mode === "horizontal");
const showVertical = computed(() => props.mode === "vertical");
const horizontalLeftPanel = computed(() => ({
  left: 0,
  right: (1 - left.value) * 100 + "%",
}));
const horizontalRightPanel = computed(() => ({
  left: (left.value + horizontalTriggerPanelWidth.value / gSplitWidth.value) * 100 + "%",
}));
const horizontaltriggerPanel = computed(() => ({
  left: left.value * 100 + "%",
}));
const verticalTopPanel = computed(() => ({
  top: 0,
  bottom: (1 - top.value) * 100 + "%",
}));
const verticalBottomPanel = computed(() => ({
  top: (top.value + verticalTriggerPanelHeight.value / gSplitHeight.value) * 100 + "%",
}));
const verticaltriggerPanel = computed(() => ({
  top: top.value * 100 + "%",
}));
const initDom = () => {
  gSplitWidth.value = gSplit.value.clientWidth;
  gSplitHeight.value = gSplit.value.clientHeight;
  if (props.mode === "horizontal") {
    horizontalTriggerPanelWidth.value = horizontalTriggerPanel.value.clientWidth;
  } else {
    verticalTriggerPanelHeight.value = verticalTriggerPanel.value.clientHeight;
  }
};
const bindEvent = () => {
  if (props.mode === "horizontal") {
    bindHorizontalTriggerPanelEvent();
  } else {
    bindVerticalTriggerPanelEvent();
  }
};
const preventSelectedOnMouseMove = (e) => e.preventDefault();
const bindHorizontalTriggerPanelEvent = () => {
  resolveMouseFn("horizontal", horizontalTriggerPanel.value);
};
const bindVerticalTriggerPanelEvent = () => {
  resolveMouseFn("vertical", verticalTriggerPanel.value);
};
const resolveMouseFn = (type, element) => {
  const mousedown = (e) => {
    document.addEventListener("selectstart", preventSelectedOnMouseMove);
    emit("onMoveStart", e);
    const pos = type === "horizontal" ? "left" : "top";
    const distance = type === "horizontal" ? e.clientX - element.offsetLeft : e.clientY - element.offsetTop;
    const mousemove = (e) => {
      emit("onMoving", e);
      const gSplitSize = type === "horizontal" ? gSplitWidth.value : gSplitHeight.value;
      const newPos = (type === "horizontal" ? e.clientX - distance : e.clientY - distance) / gSplitSize;
      if (newPos < props.min) newPos = props.min;
      if (newPos > 1 - props.min) newPos = 1 - props.min;
      if (pos === "left") left.value = newPos;
      else top.value = newPos;
    };
    const mouseup = () => {
      emit("onMoveEnd", e);
      document.removeEventListener("mousemove", mousemove);
      document.removeEventListener("mouseup", mouseup);
      document.removeEventListener("selectstart", preventSelectedOnMouseMove);
    };
    document.addEventListener("mousemove", mousemove);
    document.addEventListener("mouseup", mouseup);
  };
  element.addEventListener("mousedown", mousedown);
};
onMounted(() => {
  bindEvent();
  initDom();
});
</script>
<style lang="scss">
.g-split {
  height: 100%;
  overflow: hidden;
  .position {
    position: absolute;
  }
  .horizontal {
    position: relative;
    height: 100%;
    .left-panel, .right-panel {
      height: 100%;
    }
    .horizontal-trigger-panel {
      cursor: col-resize;
      height: 100%;
      .trigger-content-default-wrap {
        background-color: #f8f8f9;
        height: 100%;
        position: relative;
        width: 7px;
        .trigger-content {
          position: absolute;
          top: 50%;
          transform: translateY(-50%);
          .trigger-bar {
            width: 7px;
            height: 1px;
            display: block;
            background: rgba(23, 35, 61, 0.25);
            margin-top: 3px;
          }
        }
      }
    }
  }
  .vertical {
    position: relative;
    height: 100%;
    .top-panel, .bottom-panel {
      width: 100%;
    }
    .vertical-trigger-panel {
      width: 100%;
      .trigger-content-default-wrap {
        width: 100%;
        position: relative;
        height: 7px;
        cursor: row-resize;
        background-color: #f8f8f9;
        .trigger-content {
          position: absolute;
          left: 50%;
          top: 0;
          transform: translateX(-50%);
          height: 100%;
          .trigger-bar {
            width: 1px;
            height: 100%;
            display: inline-block;
            background: rgba(23, 35, 61, 0.25);
            margin-left: 3px;
            vertical-align: top;
          }
        }
      }
    }
  }
}
</style>

<template>
  <div>
    <GSplitPanel mode="horizontal" :value="0.5">
      <template v-slot:left>
        <div>左侧面板内容</div>
      </template>
      <template v-slot:right>
        <div>右侧面板内容</div>
      </template>
    </GSplitPanel>
  </div>
</template>
<script setup>
import GSplitPanel from '@/components/Split/index.vue';
</script>

import { createApp } from 'vue';
import App from './App.vue';
import GSplitPanel from '@/components/Split/index.vue';
const app = createApp(App);
app.component('GSplitPanel', GSplitPanel);
app.mount('#app');

vue
<GSplitPanel mode="horizontal" :value="0.5">
  <template v-slot:left>
    <div>左侧面板内容</div>
  </template>
  <template v-slot:right>
    <div>右侧面板内容</div>
  </template>
</GSplitPanel>