Dragula拖放與復制ng2的一種方式

Question

我正在嘗試使用ng2 dragula拖放復制的一種方法，這是我的模板。

`<div>
   <div class='wrapper'>
     <div class='container' id='no-drop' [dragula]='"first-bag"'>
       <div>Drag/drop item 1</div>
     </div>
     <div class='container' [dragula]='"first-bag"'>
       <div>Drag/drop item 2</div>
     </div>
   </div>
 </div>` 

我已設置要復制到組件中的選項。

constructor(private dragulaService: DragulaService) {
dragulaService.setOptions('first-bag', {
  copy: true
});

但是，如果我將移動設置為false，則根本無法拖動。 我如何才能從左向右移動，而不是相反。

Answer 1

發布后不久我找到了答案！！

   constructor(private dragulaService: DragulaService) {
    dragulaService.setOptions('first-bag', {
      copy: true,
      moves: function (el, container, handle) {
        return container.id !== 'no-drop';
      }
    });

Answer 2

默認情況下，dragula將允許用戶將元素拖動到任何容器中，並將其拖放到列表中的任何其他容器中。 如果將元素放置在不是容器之一的任何位置，則將根據revertOnSpill和removeOnSpill選項優雅地取消該事件。

下面的示例允許用戶從左向右拖動元素，並從右向左拖動元素。 在HomePage.component.html中創建代碼

 <div class="wrapper"> <div class="container master" [dragula]="'editor-bag'" [dragulaModel]="q1">

      <div *ngFor="let item of q1" class="box">
      {{item}}
      </div>
 </div>
 <div class="container" [dragula]="'editor-bag'">
 </div> 

接下來，創建HomePageComponent.ts。 另外，需要設置具有以下簽名的accepts方法：（el，target，source，sibling）

import { DragulaService, DragulaDirective } from 'ng2-dragula/ng2-dragula';
import { Router, Route, ActivatedRoute } from '@angular/router';
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-home-page',
  templateUrl: './home-page.component.html',
  styleUrls: ['./home-page.component.css'],
})
export class HomePageComponent implements OnInit {
  q1 = [];
  q2 = [];
  static _debug: boolean = false;
  _debug: boolean = HomePageComponent._debug;
  constructor(private dragulaService: DragulaService, private router: Router, private route: ActivatedRoute) { 
    for (var i = 0; i < 10; i++) {
      this.q1.push("1. <" + i + ">");
      //this.q2.push("2. <" + i + ">");
    }

      dragulaService.setOptions('editor-bag', {      
      accepts: function (el, target, source, sibling) {
        var fn_debug = true;
        var acceptAll = false;

          if (this._debug || fn_debug) {
            console.log("accepts() start el, target, source, sibling");
            console.log({ el, target, source, sibling });
          }
          if (target.classList.contains('master')) {
            return false;
          }
          if (sibling == null) {
            return (target.children.length == 0);
          }
          var name: string = el.innerText;
          return false;
        },

      direction: 'vertical',             // Y axis is considered when determining where an element would be dropped
      copy: function (el, source) {
        if (this._debug) {
          console.log("copy() start");
          console.log(el);
          console.log(source);
          console.log("copy() stop");
        }
        return source.classList.contains('master');
      },                       // elements are moved by default, not copied
      copySortSource: false,             // elements in copy-source containers can be reordered
      revertOnSpill: false,              // spilling will put the element back where it was dragged from, if this is true
      removeOnSpill: true,              // spilling will `.remove` the element, if this is true
      mirrorContainer: document.body,    // set the element that gets mirror elements appended
      ignoreInputTextSelection: true     // allows users to select input text, see details below
    })
  }
  ngOnInit() {

      this.dragulaService.drag.subscribe((value: any) => {
        if (this._debug) {
          console.log("drag start");
          console.log(value);
          console.log("drag stop");
          console.log(`drag: ${value[0]}`);
        }
       // this.onDrag(value.slice(1));
      });

      this.dragulaService.drop.subscribe((value: any) => {
        console.log(`drop: ${value[0]}`);
        //this.onDrop(value.slice(1));
      });

      this.dragulaService.over.subscribe((value: any) => {
        if (this._debug) { console.log(`over: ${value[0]}`); }
       // this.onOver(value.slice(1));
      });

      this.dragulaService.out.subscribe((value: any) => {
        if (this._debug) { console.log(`out: ${value[0]}`); }
        //this.onOut(value.slice(1));
      });
    }

}

我正在發布我的解決方案，因為它可能也會對某人有所幫助。

Answer 3

我更喜歡使用accepts函數而不是moves函數。

因為使用移動功能，您可以停止從容器中移動物品。 接受函數決定目標容器是否有效。

accepts: function (el, target, source, sibling) {
              // your condition
            },