如何使用指令添加新的 gridstackitem？
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【中文标题】如何使用指令添加新的 gridstackitem？【英文标题】：How to add new gridstackitem with directive? 【发布时间】：2017-06-17 12:55:35 【问题描述】：使用 gridstack.io，我想动态地拥有一个可以“添加小部件”到特定区域的按钮。我有一个要动态添加到网格中的组件“”。
鉴于我对 gridstack 的以下定义，如果我添加一个按钮，当您单击它时，会在左上角添加一个新指令，我该如何做到这一点？
我有以下指令：
grid-stack-directive.ts:
import Directive, OnInit, Input, ElementRef, Renderer from '@angular/core';
declare var $: any; // JQuery
@Directive(
selector: '[gridStack]'
)
export class GridStackDirective implements OnInit
@Input() w: number;
@Input() animate: boolean;
constructor(
private el: ElementRef,
private renderer: Renderer
)
renderer.setElementAttribute(el.nativeElement, "class", "grid-stack");
ngOnInit()
let renderer = this.renderer;
let nativeElement = this.el.nativeElement;
let animate: string = this.animate ? "yes" : "no";
renderer.setElementAttribute(nativeElement, "data-gs-width", String(this.w));
if(animate == "yes")
renderer.setElementAttribute(nativeElement, "data-gs-animate", animate);
let options =
cellHeight: 80,
verticalMargin: 10
;
// TODO: listen to an event here instead of just waiting for the time to expire
setTimeout(function ()
$('.grid-stack').gridstack(options);
, 300);
grid-stack-item-directive.ts：
import Directive, ElementRef, Input, Renderer, OnInit from '@angular/core';
@Directive(
selector: '[gridStackItem]'
)
export class GridStackItemDirective
@Input() x: number;
@Input() y: number;
@Input() w: number;
@Input() h: number;
@Input() minWidth: number;
@Input() canResize: boolean;
constructor(
private el: ElementRef,
private renderer: Renderer
)
renderer.setElementAttribute(el.nativeElement, "class", "grid-stack-item");
ngOnInit(): void
let renderer = this.renderer;
let nativeElement = this.el.nativeElement;
let cannotResize: string = this.canResize ? "yes" : "no";
let elementText: string = '<div class="grid-stack-item-content">' + nativeElement.innerhtml + '</div>';
// TODO: Find the Angular(tm) way to do this ...
nativeElement.innerHTML = elementText;
renderer.setElementAttribute(nativeElement, "data-gs-x", String(this.x));
renderer.setElementAttribute(nativeElement, "data-gs-y", String(this.y));
renderer.setElementAttribute(nativeElement, "data-gs-width", String(this.w));
renderer.setElementAttribute(nativeElement, "data-gs-height", String(this.h));
if(this.minWidth)
renderer.setElementAttribute(nativeElement, "data-gs-min-width", String(this.minWidth));
if(cannotResize == "yes")
renderer.setElementAttribute(nativeElement, "data-gs-no-resize", cannotResize);
app.component.html:
<h1>My First Grid Stack Angular 2 App</h1>
<section id="demo" class="darklue">
<div class="container">
<div class="row">
<div class="col-lg-12 text-center">
<h2>Demo</h2>
<hr class="star-light">
</div>
</div>
<div gridStack w="12" animate="true">
<div gridStackItem x="0" y="0" w="4" h="2">1</div>
<div gridStackItem x="4" y="0" w="4" h="4">2</div>
<div gridStackItem x="8" y="0" w="2" h="2" canResize="false" minWidth="2">
<span class="fa fa-hand-o-up"></span> Drag me!
</div>
<div gridStackItem x="10" y="0" w="2" h="2">4</div>
<div gridStackItem x="0" y="2" w="2" h="2">5</div>
<div gridStackItem x="2" y="2" w="2" h="4">6</div>
<div gridStackItem x="8" y="2" w="4" h="2">7</div>
<div gridStackItem x="0" y="4" w="2" h="2">8</div>
<div gridStackItem x="4" y="4" w="4" h="2">9</div>
<div gridStackItem x="8" y="4" w="2" h="2">10</div>
<div gridStackItem x="10" y="4" w="2" h="2">11</div>
</div>
</div>
</section>
index.html:
<html>
<head>
<title>Angular QuickStart</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<link rel="stylesheet" href="node_modules/font-awesome/css/font-awesome.min.css">
<link href="https://fonts.googleapis.com/css?family=Montserrat:400,700" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/css?family=Indie+Flower" rel='stylesheet' type='text/css'>
<!-- 1. Load libraries -->
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<!-- 2. Configure SystemJS -->
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function(err) console.error(err); );
</script>
<!-- jquery -->
<script src="node_modules/jquery/dist/jquery.js"></script>
<script src="node_modules/jquery-ui-dist/jquery-ui.min.js"></script>
<script src="node_modules/jquery-ui-touch-punch/jquery.ui.touch-punch.min.js"></script>
<script src="node_modules/jquery-easing/dist/jquery.easing.1.3.umd.min.js"></script>
<!-- underscore and gridstack -->
<script src="node_modules/underscore/underscore-min.js"></script>
<script src="node_modules/gridstack/dist/gridstack.js"></script>
<link rel="stylesheet" href="node_modules/gridstack/dist/gridstack.min.css">
<link rel="stylesheet" href="node_modules/gridstack/dist/gridstack-extra.min.css">
<link rel="stylesheet" href="app/css/gridstack-demo.css">
<!-- bootstrap -->
<script src="node_modules/bootstrap/dist/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.css">
<!-- freelancer stuff -->
<script src="app/js/freelancer.js"></script>
<link rel="stylesheet" href="app/css/freelancer.css">
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>
</html>
【问题讨论】：
【参考方案1】：你可以在你的gridStack指令中创建一个“路由器”——它会得到一个代表所需组件类型的字符串，并用ngIf加载它
<div customGridStackItem1 *ngIf="itemType == 'stackItem1'"></div>
<div customGridStackItem2 *ngIf="itemType == 'stackItem2'"></div>
<div anotherGridStackItem *ngIf="itemType == 'anotherStackItem'"></div>
这样你只会在每个网格项中加载你需要的组件
【讨论】：
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