256 lines
8.4 KiB
Vue
256 lines
8.4 KiB
Vue
<template>
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<div :class="$options.name"></div>
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</template>
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<script>
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export default {
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name: "sgDragMove",
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data() {
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return {
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offset: { x: 0, y: 0 }, //偏移量
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style: { top: "0px", left: "0px" },
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canDragDom: null, //触发拖拽事件的物体
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moveDom: null, //可以移动的物体
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};
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},
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props: [
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"data", //可以被拖拽的元素数组(必选)
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/* data格式说明：
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[
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...
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{
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canDragDom: elementDOM,//可以拖拽的位置元素数组or单个元素
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moveDom: elementDOM,//拖拽同步移动的元素数组or单个元素
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},
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...
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]
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*/
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"disabled", //屏蔽
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"mousedownNearSide", //按下鼠标吸附边界
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"mousemoveNearSide", //移动鼠标吸附边界
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"mouseupNearSide", //弹起鼠标吸附边界
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"nearPadding", //距离边界多少像素自动吸附（mousedownNearSide||mousemoveNearSide||mouseupNearSide=true的时候才能生效），值可以是number或array类型，例如：是5代表[5,5,5,5],其中数组以此代表[上,右,下,左]
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"stopBoundary", //停靠边界距离，移动物体将按照这个值作为界限不再移出该范围（mousedownNearSide||mousemoveNearSide||mouseupNearSide=true的时候才能生效，值可以是number或array类型，例如：是5代表[5,5,5,5],其中数组以此代表[上,右,下,左]
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"cursor", //鼠标样式
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/*cursor格式说明：{
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grab:'default',//移入可拖拽区域的鼠标样式
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grabbing:'default',//拖拽过程中鼠标样式
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} */
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],
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watch: {
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data: {
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handler(newValue, oldValue) {
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newValue ? this.__addDragsEvents(newValue) : this.__removeDragsEvents(oldValue);
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},
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deep: true,
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immediate: true,
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},
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disabled: {
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handler(newValue, oldValue) {
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newValue ? this.__removeAllEvents() : this.__addAllEvents();
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},
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deep: true,
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immediate: true,
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},
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style: {
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handler(newValue, oldValue) {
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if (this.moveDom && newValue && Object.keys(newValue).length) {
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let d = newValue;
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Object.keys(d).forEach((k) => (this.moveDom.style[k] = d[k]));
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this.moveDom.style.right = "revert";
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this.moveDom.style.bottom = "revert";
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this.$emit(`getStyle`, d); //用这个方式抛出被移动物体的位置数据（解决多处修改同一DOM属性导致的冲突问题）
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}
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},
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deep: true, //深度监听
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immediate: true, //立即执行
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},
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},
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destroyed() {
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this.__removeAllEvents();
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},
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mounted() {
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this.$parent.$el.style.setProperty(
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"--sgDragMove-grab",
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(this.cursor || {}).grab || "grab"
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); //js往css传递局部参数
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this.$parent.$el.style.setProperty(
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"--sgDragMove-grabbing",
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(this.cursor || {}).grabbing || "grabbing"
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); //js往css传递局部参数
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},
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methods: {
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__addAllEvents() {
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this.__addDragsEvents(this.data);
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},
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__removeAllEvents() {
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this.__removeWindowEvents();
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this.__removeDragsEvents(this.data);
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},
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__addWindowEvents() {
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this.__removeWindowEvents();
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addEventListener("mousemove", this.mousemove_window);
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addEventListener("mouseup", this.mouseup_window);
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},
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__removeWindowEvents() {
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removeEventListener("mousemove", this.mousemove_window);
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removeEventListener("mouseup", this.mouseup_window);
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},
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// 初始化需要拖拽的DIV
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__addDragsEvents(doms) {
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(doms || []).forEach((dom) => {
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this.__removeDraggedEvents(dom.canDragDom);
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this.__addDraggedEvents(dom.canDragDom);
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});
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},
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__removeDragsEvents(doms) {
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(doms || []).forEach((dom) => {
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this.__removeDraggedEvents(dom.canDragDom);
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});
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},
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__addDraggedEvents(dom) {
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dom.setAttribute("sgDragMove_grab", "ready");
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dom.addEventListener("dragstart", this.dragstart);
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dom.addEventListener("mousedown", this.mousedown);
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},
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__removeDraggedEvents(dom) {
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dom.removeEventListener("dragstart", this.dragstart);
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dom.removeEventListener("mousedown", this.mousedown);
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},
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dragstart(e) {
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e.stopPropagation();
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e.preventDefault();
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return false;
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},
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mousedown(e) {
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if (this.disabled) return this.mouseup_window(e);
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if (e.button === 2) return this.mouseup_window(e); //点击了鼠标右键
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this.canDragDom = e.currentTarget;
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this.moveDom = this.data.find((v) => v.canDragDom == this.canDragDom).moveDom;
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this.canDragDom.setAttribute("sgDragMove_grab", "down");
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this.moveDom.setAttribute("sgDragMove_move", "ready");
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let or = this.moveDom.getBoundingClientRect();
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this.offset = { x: e.clientX - or.x, y: e.clientY - or.y };
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(this.mousedownNearSide || this.mousedownNearSide === "") && this.nearSide();
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this.$emit("dragStart", this.getResult(e));
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this.__addWindowEvents();
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},
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setOffset(d) {
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this.offset = {
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...this.offset,
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...d,
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};
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},
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mousemove_window(e) {
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this.canDragDom.setAttribute("sgDragMove_grab", "down");
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this.moveDom.setAttribute("sgDragMove_move", "ing");
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let x = e.clientX - this.offset.x;
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let y = e.clientY - this.offset.y;
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this.style = { left: x + "px", top: y + "px" };
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this.style["transition-property"] = "left,top";
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this.style["transition-duration"] = "0s,0s";
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this.$nextTick(() => {
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(this.mousemoveNearSide || this.mousemoveNearSide === "") && this.nearSide();
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this.$emit("dragging", this.getResult(e));
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});
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},
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mouseup_window(e) {
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this.$emit("dragEnd", this.getResult(e));
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(this.mouseupNearSide || this.mouseupNearSide === "") && this.nearSide();
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this.offset = null;
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this.style = null;
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this.canDragDom.setAttribute("sgDragMove_grab", "ready");
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this.moveDom.setAttribute("sgDragMove_move", "end");
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setTimeout(() => {
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this.moveDom && this.moveDom.removeAttribute("sgDragMove_move");
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}, 100);
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this.canDragDom = null;
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this.moveDom = null;
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this.__removeWindowEvents();
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},
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// 自动吸附网页边界
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nearSide() {
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let arr = this.nearPadding ? JSON.parse(JSON.stringify(this.nearPadding)) : 0;
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Array.isArray(arr) || (arr = [...Array(4)].map((v) => arr));
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let [dis_top, dis_right, dis_bottom, dis_left] = arr;
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arr = this.stopBoundary ? JSON.parse(JSON.stringify(this.stopBoundary)) : 0;
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Array.isArray(arr) || (arr = [...Array(4)].map((v) => arr));
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let [
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stopBoundary_top,
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stopBoundary_right,
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stopBoundary_bottom,
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stopBoundary_left,
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] = arr;
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let x = parseFloat(this.moveDom.style.left);
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let y = parseFloat(this.moveDom.style.top);
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let rect = this.moveDom.getBoundingClientRect();
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let min_side_x = 0,
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min_x = min_side_x + dis_left,
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min_left = min_side_x + stopBoundary_left;
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let min_side_y = 0,
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min_y = min_side_y + dis_top,
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min_top = min_side_y + stopBoundary_top;
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x < min_x && (this.moveDom.style.left = `${min_left}px`);
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y < min_y && (this.moveDom.style.top = `${min_top}px`);
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let max_side_x = innerWidth - rect.width,
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max_x = max_side_x - dis_right,
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max_right = max_side_x - stopBoundary_right;
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let max_side_y = innerHeight - rect.height,
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max_y = max_side_y - dis_bottom,
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max_bottom = max_side_y - stopBoundary_bottom;
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x > max_x && (this.moveDom.style.left = `${max_right}px`);
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y > max_y && (this.moveDom.style.top = `${max_bottom}px`);
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},
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getResult(e) {
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return {
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$event: e,
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canDragDom: this.canDragDom,
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moveDom: this.moveDom,
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canDragDomRect: this.canDragDom ? this.canDragDom.getBoundingClientRect() : null,
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moveDomRect: this.moveDom ? this.moveDom.getBoundingClientRect() : null,
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};
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},
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},
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};
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</script>
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<style lang="scss" scoped>
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[sgDragMove_grab="ready"] {
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cursor: var(--sgDragMove-grab); //css获取js传递的参数
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* {
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cursor: var(--sgDragMove-grab); //css获取js传递的参数
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}
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&:hover {
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opacity: 1;
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}
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&:active {
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opacity: 0.9;
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}
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}
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[sgDragMove_grab="down"] {
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cursor: var(--sgDragMove-grabbing); //css获取js传递的参数
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* {
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cursor: var(--sgDragMove-grabbing); //css获取js传递的参数
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}
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}
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[sgDragMove_move="ready"] {
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opacity: 1;
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}
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[sgDragMove_move="ing"] {
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opacity: 0.9;
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}
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[sgDragMove_move="end"] {
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transition: 0.1s;
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}
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</style>
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