vue拖拽组件开发
创建临时vue项目
先查看node和npm版本，怎么安装就不多多bb了
再安装vue-cli
npm install vue-cli -g //全局安装 vue-cli
检测是否安装成功
vue list
创建项目
vue init webpack "项目名称"
开始写拖拽组件
组件就暂且命名为 JuDrag吧。然后再在index.vue里面引入，代码如下：
<template>
<div class="a">
<ju-drag :post_data="post_data">
<div
v-for="item in post_data"
:key="item.id"
:id="item.id"
class="b"
>{{item.name}}</div>
</ju-drag>
<div class="b"></div>
</div>
</template>
<script>
import JuDrag from "@/components/JuDrag";
export default {
name: "index",
components: {
JuDrag
},
data() {
return {
post_data: [
{
id: 11111,
name: "第一个块"
},
{
id: 22222,
name: "第二个块"
},
{
id: 33333,
name: "第三个块"
},
{
id: 44444,
name: "第四个块"
},
{
id: 555555,
name: "第五个块"
},
{
id: 66666,
name: "第六个块"
},
{
id: 77777,
name: "第七个块"
}
]
};
},
mounted() {}
};
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style >
.a {
200px;
padding: 10px;
border: 1px #eee solid;
}
.b {
margin-bottom: 10px;
height: 50px;
background: red;
}
</style>
然后写JuDrag.vue代码
<template>
<div>
<slot></slot>
</div>
</template>
<script>
export default {
name: "HelloWorld",
data() {
return {
pitch_div_id: "", //正在移动的id
};
},
props: {
post_data: Array
},
mounted() {
this.post_data.forEach(item => {
let element = document.getElementById(item.id);
element.setAttribute("draggable", "true");
element.style =
"transition:all 0.5s cubic-bezier(0,0,1,1) 0s;";
this.addHandler(element);
});
},
methods: {
dragstart(event) {
event.dataTransfer.setData("Text", event.target.id);
event.target.style.opacity = "0.4";
this.pitch_div_id = event.target.id;
},
drag(event) {},
dragend(event) {
event.target.style.opacity = "1";
},
dragenter(event) {
if (event.target.id == "") return;
if (event.target.id == this.pitch_div_id) return;
let x = "",
y = "";
this.post_data.forEach((item, index) => {
if (item.id == this.pitch_div_id) x = index;
if (item.id == event.target.id) y = index;
});
this.post_data = this.moveArray(this.post_data, x, y);
this.animation(x, y, this.pitch_div_id, event.target.id);
},
dragover(event) {
//更改图标
this.preventDefault(event);
},
dragleave(event) {},
drop(event) {
//关闭火狐默认打开事件
this.preventDefault(event);
this.stopPropagation(event);
},
animation(x, y, x_id, y_id) {
let x_element = document.getElementById(x_id);
let y_element = document.getElementById(y_id);
},
moveArray(array, x, y) {
if (x < y) {
array.splice(y + 1, 0, array[x]);
array.splice(x, 1);
} else {
array.splice(y, 0, array[x]);
array.splice(x + 1, 1);
}
return array;
},
addHandler(element) {
let arr = [
"dragstart",
"drag",
"dragend",
"dragenter",
"dragover",
"dragleave",
"drop"
];
arr.forEach(item => {
let getEvent = event => {
let event_new = this.getEvent(event);
this[item](event_new);
};
if (element.addEventListener) {
element.addEventListener(item, getEvent, false);
} else if (element.attachEvent) {
element.attachEvent("on" + item, getEvent);
} else {
element["on" + item] = getEvent;
}
});
},
removeHandler(element, type, handler) {
if (element.removeEventListener) {
element.removeEventListener(type, handler, false);
} else if (element.detachEvent) {
element.detachEvent("on" + type, handler);
} else {
element["on" + type] = null;
}
},
getEvent(event) {
return event ? event : window.event;
},
getTarget(event) {
return event.target || event.srcElement;
},
//取消事件默认动作
preventDefault(event) {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
},
stopPropagation(event) {
if (event.stopPropagation) {
event.stopPropagation();
} else {
event.cancelBubbles = true;
}
},
//获取与目标节点事件相关的节点信息
getRelatedTarget(event) {
if (event.relatedTarger) {
return event.relatedTarget;
} else if (event.toElement) {
return event.toElement;
} else if (event.fromElement) {
return event.fromElement;
} else {
return null;
}
}
}
};
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style>
</style>
