//directives.ts
import { App } from "vue";
import { throttle } from "@/utils"; //節(jié)流函數(shù)不再展示，不要直接去除即可，在下面樣式引用去除即可

const directives = {
  drag: {
    mounted(el: any, binding: any, vnode: any) {
      // 如果傳遞了false就不啟用指令，反之true undefined null 不傳 則啟動(dòng)
      if (!binding.value && (binding.value ?? "") !== "") return;
      // 拖拽實(shí)現(xiàn)
      const odiv = el.parentNode;
      el.onmousedown = (eve: any) => {
        odiv.style.zIndex = 1; //當(dāng)前拖拽的在最前面顯示
        eve = eve || window.event;
        const mx = eve.pageX; //鼠標(biāo)點(diǎn)擊時(shí)的坐標(biāo)
        const my = eve.pageY; //鼠標(biāo)點(diǎn)擊時(shí)的坐標(biāo)
        const dleft = odiv.offsetLeft; //窗口初始位置
        const dtop = odiv.offsetTop;
        const clientWidth = document.documentElement.clientWidth; //頁(yè)面的寬
        const oWidth = odiv.clientWidth; //窗口的寬
        const maxX = clientWidth - oWidth; // x軸能移動(dòng)的最大距離
        const clientHeight = document.documentElement.clientHeight; //頁(yè)面的高
        const oHeight = odiv.clientHeight; //窗口的高度
        const maxY = clientHeight - oHeight; //y軸能移動(dòng)的最大距離
        document.onmousemove = (e: any) => {
          const x = e.pageX;
          const y = e.pageY;
          let left = x - mx + dleft; //移動(dòng)后的新位置
          let top = y - my + dtop; //移動(dòng)后的新位置
          if (left < 0) left = 0;
          if (left > maxX) left = maxX;
          if (top < 0) top = 0;
          if (top > maxY) top = maxY;

          odiv.style.left = left + "px";
          odiv.style.top = top + "px";
          odiv.style.marginLeft = 0;
          odiv.style.marginTop = 0;
        };
        document.onmouseup = () => {
          document.onmousemove = null;
        };
      };
    }
  },
  resize: {
    mounted(el: any, binding: any, vnode: any) {
      // 如果傳遞了false就不啟用指令，反之true undefined null 不傳 則啟動(dòng)
      if (!binding.value && (binding.value ?? "") !== "") return;
      // 給選定的元素綁定name屬性 設(shè)置name為resize區(qū)分只有該元素可以縮放
      el.name = "resize";
      // 八個(gè)方位對(duì)應(yīng)
      const mouseDir = {
        top: "n-resize", //上
        bottom: "s-resize", //下
        left: "w-resize", //左
        right: "e-resize", //右
        topright: "ne-resize", //右上
        topleft: "nw-resize", //左上
        bottomleft: "sw-resize", //左下
        bottomright: "se-resize" //右下
      };
      // 記錄被修改元素的原始位置大小，以及變更方向
      const pos = { width: 0, height: 0, top: 0, left: 0, x: 0, y: 0, dir: "" };
      // 獲取鼠標(biāo)所在方位
      const getDirection = (ev: any): string => {
        let dir = "";
        const xP = ev.offsetX;
        const yP = ev.offsetY;
        const offset = 12; //內(nèi)邊距為多少時(shí)觸發(fā)
        // 計(jì)算是那個(gè)方位
        if (yP < offset) dir += "top";
        else if (yP > ev.toElement.clientHeight - offset) dir += "bottom";
        if (xP < offset) dir += "left";
        else if (xP > ev.toElement.clientWidth - offset) dir += "right";
        return dir;
      };
      // 計(jì)算移動(dòng)距離
      const computedDistance = (pre: any, cur: any): any => {
        return [cur.x - pre.x, cur.y - pre.y];
      };
      //數(shù)據(jù)重置
      const resetData = () => {
        pos.width = 0;
        pos.height = 0;
        pos.top = 0;
        pos.left = 0;
        pos.x = 0;
        pos.y = 0;
        pos.dir = "";
        document.onmousemove = null;
      };
      // 變更尺寸方法
      const changeSize = (e: any) => {
        // 兩個(gè)點(diǎn)之間的差值，計(jì)算鼠標(biāo)位移數(shù)值
        const [disX, disY] = computedDistance(
          { x: pos.x, y: pos.y },
          { x: e.pageX, y: e.pageY }
        );
        const addWid = pos.width + disX;
        const subWid = pos.width - disX;
        const addHig = pos.height + disY;
        const subHig = pos.height - disY;
        const minX = 200;
        const minY = 200;
        //上下左右的變更方法
        const top = () => {
          if (subHig <= minY) return; //不能小于最小最高
          el.style.height = subHig + "px";
          el.style.top = pos.top + disY + "px";
        }; // 上
        const bottom = () => {
          el.style.height = addHig + "px";
        }; // 下
        const left = () => {
          if (subWid <= minX) return; //不能小于最小寬度
          el.style.width = subWid + "px";
          el.style.left = pos.left + disX + "px";
        }; // 左
        const right = () => {
          el.style.width = addWid + "px";
        }; // 右
        // 變更方位及其修改方法映射
        const doFn = {
          top, //上
          bottom, //下
          left, //左
          right, //右
          topright: () => {
            top();
            right();
          }, //右上
          topleft: () => {
            top();
            left();
          }, //左上
          bottomleft: () => {
            bottom();
            left();
          }, //左下
          bottomright: () => {
            bottom();
            right();
          } //右下
        };
        doFn[pos.dir]();
      };
      //鼠標(biāo)按下 觸發(fā)變更事件
      el.onmousedown = (e: any) => {
        if (e.target.name !== "resize") return;
        let d = getDirection(e);
        //當(dāng)位置為四個(gè)邊和四個(gè)角才開啟尺寸修改
        if (mouseDir[d]) {
          pos.width = el.clientWidth;
          pos.height = el.clientHeight;
          pos.top = el.offsetTop;
          pos.left = el.offsetLeft;
          pos.x = e.pageX;
          pos.y = e.pageY;
          pos.dir = d;
          document.onmousemove = changeSize;
        }
        document.onmouseup = resetData;
      };

      /** 鼠標(biāo)樣式變更 */
      const changeShowCursor = throttle((e: any) => {
        e.preventDefault();
        el.style.cursor = "default"; //先恢復(fù)鼠標(biāo)默認(rèn)
        if (e.target.name !== "resize") return;
        // 修改鼠標(biāo)顯示效果
        let d = getDirection(e);
        // 確定是某個(gè)方位的動(dòng)向
        el.style.cursor = mouseDir[d] || "default";
      }, 200); //節(jié)流0.2s
      el.onmousemove = changeShowCursor; //監(jiān)聽根元素上移動(dòng)的鼠標(biāo)事件
    }
  }
};

export default (app: App) => {
  //批量注冊(cè)指令
  Object.entries(directives).forEach(([key, fn]) => {
    app.directive(key, fn);
  });
};

//main.ts 全局注冊(cè)
import { createApp } from "vue";
import App from "./App.vue";
import registerDirectives from "@/directives";
const app = createApp(App);
registerDirectives(app);
app.mount("#app");

<template>
  <transition name="drag-win">
    <div
      class="drag-dialog ban-select-font"
      ref="dragWin"
      v-show="props.modelValue"
      v-resize="props.resizeAble"
    >
      <!-- 拖拽窗體頭部 -->
      <div class="drag-bar" :style="props.headStyle" v-drag="props.dragAble">
        <slot name="head" />
        <div
          class="drag-btn drag-close"
          @click="controlDialog"
          v-if="props.closeShow"
        />
        <i
          class="drag-btn drag-full"
          @click="fullScreen"
          v-if="props.fullShow"
        />
      </div>
      <!-- 拖拽框主要部分 -->
      <div class="drag-main" :style="props.mainStyle">
        <slot />
      </div>
    </div>
  </transition>
</template>

<script lang="ts" setup>
import { ref } from "vue";

// props傳入數(shù)據(jù)類型約束
interface Props {
  modelValue: boolean; //控制窗體的顯示與否
  width?: string; // 默認(rèn)寬 —— 設(shè)置頭高 寬高最好傳入變量
  height?: string; // 默認(rèn)高
  headHeight?: string; // 默認(rèn)控制欄高
  headStyle?: string; // 控制欄樣式
  mainStyle?: string; //主要內(nèi)容區(qū)域樣式
  resizeAble?: boolean | string; // 是否可以調(diào)整尺寸 默認(rèn)可以調(diào)整
  dragAble?: boolean | string; // 是否可以拖拽 默認(rèn)可拖拽
  closeShow?: boolean; // 關(guān)閉控制顯示 默認(rèn)不顯示
  fullShow?: boolean; // 全屏控制顯示 默認(rèn)不顯示
}
/** 組件調(diào)整參數(shù)默認(rèn)值 */
const props = withDefaults(defineProps<Props>(), {
  modelValue: true,
  width: "500px",
  height: "60vh",
  headHeight: "35px",
  headStyle: "",
  mainStyle: "",
  resizeAble: "",
  dragAble: "",
  closeShow: false,
  fullShow: false
});

// 窗體記錄數(shù)據(jù)類型約束
interface recordType {
  width: number;
  height: number;
  top: number;
  left: number;
  fill: boolean;
}
//記錄原來(lái)的大小
const recordBox: recordType = {
  width: 0,
  height: 0,
  top: 0,
  left: 0,
  fill: false
};

//獲取窗口實(shí)體
const dragWin: any = ref(null);
// 事件定義
const emits = defineEmits(["update:modelValue"]);

/** 方法定義 */
// 內(nèi)部控制窗口開關(guān)
const controlDialog = () => {
  emits("update:modelValue", !props.modelValue);
};

// 全屏控件
const fullScreen = () => {
  const tmp = dragWin.value;
  const style = dragWin.value.style;
  // 寬的樣式 如果被手動(dòng)縮小或者放大，則表示非全屏狀態(tài)，則將狀態(tài)置為false
  if (!style.width || style.width !== "100vw") {
    recordBox.fill = false;
  }
  // 全屏或是還原
  if (recordBox.fill) {
    style.width = `${recordBox.width}px`;
    style.height = `${recordBox.height}px`;
    style.top = `${recordBox.top}px`;
    style.left = `${recordBox.left}px`;
  } else {
    // 記錄一下原來(lái)的樣式
    recordBox.width = tmp.offsetWidth;
    recordBox.height = tmp.offsetHeight;
    recordBox.top = tmp.offsetTop;
    recordBox.left = tmp.offsetLeft;
    //全屏樣式
    style.width = "100vw";
    style.height = "100vh";
    style.top = "0px";
    style.left = "0px";
  }
  recordBox.fill = !recordBox.fill; // 全屏狀態(tài)變換
};
</script>

<style scoped>
 /* 禁止選中文字 */
.ban-select-font {
  -moz-user-select: none; /*火狐*/
  -webkit-user-select: none; /*webkit瀏覽器*/
  -ms-user-select: none; /*IE10*/
  -khtml-user-select: none; /*早期瀏覽器*/
  user-select: none;
}
    
.drag-dialog {
  position: fixed;
  width: v-bind("props.width");
  height: v-bind("props.height");
  left: calc(50% - v-bind("props.width") / 2);
  top: calc(50% - v-bind("props.height") / 2);
  box-sizing: border-box;
  padding: 8px;
  overflow: hidden;
  color: #fff;
  min-width: 200px;
  min-height: 200px;
  max-width: 100vw;
  max-height: 100vh;
  background-color: #313438cc;
}

.drag-bar {
  width: 100%;
  cursor: move;
  height: v-bind("props.headHeight");
  border-bottom: 1px solid #fff;
  box-sizing: border-box;
  padding: 1px 2px 9px;
}

.drag-btn {
  width: 25px;
  height: 25px;
  float: right;
  cursor: pointer;
  margin-left: 5px;
  border-radius: 50%;
}

.drag-full {
  background-color: #28c940b8;
}

.drag-full:hover {
  background-color: #28c93f;
}

.drag-close {
  background-color: #f2473ec7;
}

.drag-close:hover {
  background-color: #f2473e;
}

.drag-main {
  width: 100%;
  height: calc(100% - v-bind("props.headHeight"));
  box-sizing: border-box;
  overflow: auto;
  font-size: 13px;
  line-height: 1.6;
}

/* vue漸入漸出樣式 */
.drag-win-enter-from,
.drag-win-leave-to {
  opacity: 0;
  transform: scale(0);
}
.drag-win-enter-to,
.drag-win-leave-from {
  opacity: 1;
}
.drag-win-enter-active,
.drag-win-leave-active {
  transition: all 0.5s ease;
}
</style>

<template>
  <div>示例演示：</div>
  <button @click="control">{{ btnName }}</button>
  <button @click="box = !box">box控制</button>
  <IsDragDialog v-model="show" closeShow fullShow>
    <template #head>我是頭</template>
    <div>我是內(nèi)容區(qū)域</div>
  </IsDragDialog>
  <!-- 關(guān)閉某些選項(xiàng) -->
  <IsDragDialog
    style="top: 200px; left: 10px"
    v-model="box"
    :resize-able="false"
    drag-able
    closeShow
    fullShow
    width="100px"
    height="100px"
  />
</template>

<script lang="ts" setup>
import IsDragDialog from "@/components/IsDragDialog.vue"; //因?yàn)槭褂玫氖?script setup 這里組件會(huì)直接注冊(cè)
import { computed } from "@vue/reactivity";
import { ref } from "vue";

const show = ref(true);
const box = ref(true);
const control = () => {
  show.value = !show.value;
};

const btnName = computed(() => {
  return show.value ? `關(guān)閉窗口` : `打開窗口`;
});
</script>