角度多重拖放(ng2-dragula)
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【中文标题】角度多重拖放(ng2-dragula)【英文标题】:Angular Multiple Drag and Drop (ng2-dragula) 【发布时间】:2018-07-22 13:06:51 【问题描述】:我正在寻找支持多重拖动的拖放库。但我找不到任何角度 2+。 ng2-dragula 支持我们想要的,除了多次拖放。任何人都可以建议任何库或如何覆盖 ng2 dragula 来实现相同的目标。 以下是我们正在寻找的功能:
-
拖动到目标容器中的特定位置
拖动多个项目
拖动到同一个容器中
适用于任何类型的元素
支持复制和移动到目标
【问题讨论】:
您可以尝试angular-sortablejs
了解您的功能。
非常感谢。即使在可排序的 js 中也没有多次拖动的选项
多次拖动是什么意思?
您能否补充一下,以回答您如何为 multi darg drop 实现相同的操作?
一般情况下你可以使用 ng2-dragula 来做这个 - 找租:jsfiddle.net/tx7aym91/4
【参考方案1】:
基于this commentgithub bevacqua/dragula
issue: Drag and drop multiple items #50。
我做了一些改进,允许通过所选项目拖放多个项目:https://jsfiddle.net/twfcd5hx/1/
在 ng2-dragula 上:https://stackblitz.com/edit/ng2-dragula-base-i41w6c?file=src/app/app.component.ts
相关代码(注意I've tried using the pure angular way 但没有按预期工作,一旦我找到纯角度代码就会更新):
this.dragulaService.cloned("dnd").subscribe(( clone, original, cloneType ) =>
this.mirrorContainer = $('.gu-mirror').first();
this.mirrorContainer.removeClass('ex-over');
this.selectedItems = $('.ex-over');
this.hasMultiple = this.selectedItems.length > 1 || (this.selectedItems.length == 1 && !$(original).hasClass('ex-over'));
if (this.hasMultiple)
$('.gu-transit').addClass('ex-over');
this.selectedItems = $('.ex-over');
this.mirrorContainer.empty();
var height = 0,
width = 0;
let temp = this.mirrorContainer;
this.selectedItems.each(function (index)
var item = $(this);
var mirror = item.clone(true);
mirror.removeClass('ex-over gu-transit');
temp.append(mirror);
temp.css('background-color', 'transparent');
item.addClass('gu-transit');
var rect = item[0].getBoundingClientRect();
height += rect.height;
width = rect.width;
);
this.mirrorContainer = temp;
this.mirrorContainer.css('height', height + 'px');
);
您需要在.ts
文件上声明import $ from 'jquery';
并安装@types/jquery
、jquery
解释:
this.mirrorContainer = $('.gu-mirror').first();
抓取镜像容器dragula
默认创建
this.mirrorContainer.removeClass('ex-over');
多选项目会有这个类,但我们不希望它出现在镜子里的那些上
this.selectedItems = $('.ex-over');
获取多选项目
this.hasMultiple = this.selectedItems.length > 1 || (this.selectedItems.length == 1 && !$(original).hasClass('ex-over'));
检查是否选择了多个项目,并考虑它们从尚未选择的项目开始拖动的位置
if (this.hasMultiple) // we have multiple items selected
$('.gu-transit').addClass('ex-over'); // edge case: if they started dragging from an unselected item, adds the selected item class
this.selectedItems = $('.ex-over'); // update list of selected items in case of edge case above
this.mirrorContainer.empty(); // clear the mirror container, we're going to fill it with clones of our items
var height = 0,
width = 0; // will track final dimensions of the mirror container
let temp = this.mirrorContainer; // used to temporary store this.mirrorContainer since otherwise would return undefined
this.selectedItems.each(function (index) // clone the selected items into the mirror container
var item = $(this); // the item
var mirror = item.clone(true); // clone the item
mirror.removeClass('ex-over gu-transit'); // remove the state classes if necessary
temp.append(mirror); //add the clone to mirror container
temp.css('background-color', 'transparent');
item.addClass('gu-transit'); //add drag state class to item
var rect = item[0].getBoundingClientRect(); // update the dimensions for the mirror container
height += rect.height;
width = rect.width;
);
this.mirrorContainer = temp; // restore this.mirrorContainer value after updated
this.mirrorContainer.css('height', height + 'px'); //set final height of mirror container
请注意,在下面的代码中,我使用el.remove()
来删除存储到目标元素的拖动元素,因为我已经创建了moveback()
和moveto()
函数(related explanation)。
this.dragulaService.drop("dnd")
.subscribe(( name, el, target, source, sibling ) =>
if (source.attributes[2].value === "data" && (target.attributes[3].value === "ct" || target.attributes[2].value === "target"))
if (this.target.length > 0)
this.placeholdertarget = false;
if (this.data.length < 1)
this.placeholderdata = true;
if (!this.hasMultiple)
let target = document.getElementsByClassName('target');
for (let i = target.length - 1; i >= 0; i--)
if (target[i].className.includes('ex-over') && i >= 0)
this.removeClass(target[i], 'ex-over');
else
el.remove();
this.moveto();
for (let i = 0; i < this.target.length; i++)
this.target[i].state = false;
this.challtarget = false;
else if (source.attributes[2].value === "target" && (target.attributes[3].value === "cd" || target.attributes[2].value === "data"))
if (this.target.length < 1)
this.placeholdertarget = true;
if (this.data.length > 0)
this.placeholderdata = false;
if (!this.hasMultiple)
let target = document.getElementsByClassName('data');
for (let i = target.length - 1; i >= 0; i--)
if (target[i].className.includes('ex-over') && i >= 0)
this.removeClass(target[i], 'ex-over');
else
el.remove();
this.moveback();
for (let i = 0; i < this.data.length; i++)
this.data[i].state = false;
this.challdata = false;
else
// console.log('spilled');
// this.dragulaService.find('dnd').drake.cancel(true);
);
【讨论】:
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