Mobile Angular UI - 拖放
拖放功能允许您通过抓取 html 元素并将其拖放到其他位置来控制它。
要使用 Mobile Angular UI 中的拖放功能，您需要添加手势模块。
首先在 index.html 中添加 JavaScript 文件，如下所示 −
<script src="node_modules/mobile-angular-ui/dist/js/mobile-angular-ui.gestures.min.js"></script>
稍后在 app.js 中添加手势模块作为依赖项，如下所示 −
var app=angular.module('myFirstApp', [
'ngRoute',
'mobile-angular-ui',
'mobile-angular-ui.gestures'
]);
我们需要使用 $drag 模块创建一个自定义指令来拖动项目。
使用 $drag 模块的语法如下 −
$drag.bind(element, dragOptions, touchOptions);
参数
element − 您要拖动的 html 元素。
dragOptions − 它是一个具有以下详细信息的对象 −
var dragOptions= {
transform: $drag.TRANSLATE_BOTH,
start: function(dragInfo, event){},
end: function(dragInfo, event){},
move: function(dragInfo, event){},
cancel: function(dragInfo, event){}
};
对于transform，您可以使用以下选项 −
$drag.NULL_TRANSFORM − 元素不进行变换移动。
$drag.TRANSLATE_BOTH − 元素将同时在 x 轴和 y 轴上移动。
$drag.TRANSLATE_HORIZONTAL − 元素将在 x 轴上移动。
$drag.TRANSLATE_UP − 元素将在负 y 轴上移动。
$drag.TRANSLATE_DOWN − 元素将在正 y 轴上移动。
$drag.TRANSLATE_LEFT − 元素将在负 x 轴上移动。
$drag.TRANSLATE_RIGHT −元素将沿 x 轴正方向移动。
$drag.TRANSLATE_VERTICAL − 元素将沿 y 轴方向移动。
$drag.TRANSLATE_INSIDE − 它利用如下所示的函数 −
{
transform: $drag.TRANSLATE_INSIDE(myElement)
}
开始、结束、移动、取消是一个以 draginfo 和事件详细信息作为参数的函数。
draginfo − 它是 $touch 模块的扩展版本。它具有以下详细信息 −
originalTransform − 在 $drag 绑定之前相对于 CSS 变换的 $变换对象。
originalRect − 在任何拖动操作之前绑定元素的边界客户端矩形。
startRect − 在开始事件时注册的绑定元素的边界客户端矩形。
startTransform −开始事件时的 $transform。
rect − 绑定元素的当前 Bounding Client Rect。
transform − 当前 $transform。
reset − 将元素恢复为 originalTransform 的函数。
undo − 将元素恢复为 startTransform 的函数。
touchOptions − 是要传递给底层 $touch 服务的选项对象。
使用 src/js/app.js 中的 $drag 模块创建指令，如下所示 −
app.directive('dragItem', ['$drag', function($drag) {
return {
controller: function($scope, $element) {
$drag.bind($element,
{
transform: $drag.TRANSLATE_BOTH,
end: function(drag) {
drag.reset();
}
},
{
sensitiveArea: $element.parent()
}
);
}
};
}]);
让我们看一个拖动元素的工作示例 −
Index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Mobile Angular UI Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimal-ui" />
<meta name="apple-mobile-web-app-status-bar-style" content="yes" />
<link rel="shortcut icon" href="/assets/img/favicon.png" type="image/x-icon" />
<link rel="stylesheet" href="node_modules/mobile-angular-ui/dist/css/mobile-angular-ui-hover.min.css" />
<link rel="stylesheet" href="node_modules/mobile-angular-ui/dist/css/mobile-angular-ui-base.min.css" />
<link rel="stylesheet" href="node_modules/mobile-angular-ui/dist/css/mobile-angular-ui-desktop.min.css" />
<script src="node_modules/angular/angular.min.js"></script>
<script src="node_modules/angular-route/angular-route.min.js"></script>
<script src="node_modules/mobile-angular-ui/dist/js/mobile-angular-ui.min.js"></script>
<script src="node_modules/angular-route/angular-route.min.js"></script>
<script src="node_modules/mobile-angular-ui/dist/js/mobile-angular-ui.gestures.min.js"></script>
<link rel="stylesheet" href="src/css/app.css" />
<script src="src/js/app.js"></script>
</head>
<body ng-app="myFirstApp" ng-controller="MainController">
<!-- Sidebars -->
<div class="sidebar sidebar-left">
<div class="scrollable">
<h1 class="scrollable-header app-name">Tutorials</h1>
<div class="scrollable-content">
<div class="list-group" ui-turn-off='uiSidebarLeft'>
<a class="list-group-item" href="/">Home Page </a>
<a class="list-group-item" href="#/academic"><i class="fa fa-caret-right"></i>Academic Tutorials </a>
<a class="list-group-item" href="#/bigdata"><i class="fa fa-caret-right"></i>Big Data & Analytics </a>
<a class="list-group-item" href="#/computerProg"><i class="fa fa-caret-right"></i>Computer Programming </a>
<a class="list-group-item" href="#/computerscience"><i class="fa fa-caret-right"></i>Computer Science </a>
<a class="list-group-item" href="#/databases"><i class="fa fa-caret-right"></i>Databases </a>
<a class="list-group-item" href="#/devops"><i class="fa fa-caret-right"></i>DevOps </a>
</div>
</div>
</div>
</div>
<div class="sidebar sidebar-right">
<div class="scrollable">
<h1 class="scrollable-header app-name">eBooks</h1>
<div class="scrollable-content">
<div class="list-group" ui-toggle="uiSidebarRight">
<a class="list-group-item" href="#/php"><i class="fa fa-caret-right"></i>PHP </a>
<a class="list-group-item" href="#/Javascript"><i class="fa fa-caret-right"></i>Javascript </a>
</div>
</div>
</div>
</div>
<div class="app">
<div class="navbar navbar-app navbar-absolute-top">
<div class="navbar-brand navbar-brand-center" ui-yield-to="title">
TutorialsPoint
</div>
<div class="btn-group pull-left">
<div ui-toggle="uiSidebarLeft" class="btn sidebar-left-toggle">
<i class="fa fa-th-large "></i> Tutorials
</div>
</div>
<div class="btn-group pull-right" ui-yield-to="navbarAction">
<div ui-toggle="uiSidebarRight" class="btn sidebar-right-toggle">
<i class="fal fa-search"></i> eBooks
</div>
</div>
</div>
<div class="navbar navbar-app navbar-absolute-bottom">
<div class="btn-group justified">
<a ui-turn-on="aboutus_modal" class="btn btn-navbar"><i class="fal fa-globe"></i> About us</a>
<a ui-turn-on="contactus_overlay" class="btn btn-navbar"><i class="fal fa-map-marker-alt"></i> Contact us</a>
</div>
</div>
<!-- App body -->
<div class='app-body'>
<div class='app-content'>
<ng-view></ng-view>
</div>
</div>
</div><!-- ~ .app -->
<!-- Modals and Overlays -->
<div ui-yield-to="modals"></div>
</body>
</html>
src/js/app.js
/* eslint no-alert: 0 */
'use strict';
//
// Here is how to define your module
// has dependent on mobile-angular-ui
//
var app=angular.module('myFirstApp', [
'ngRoute',
'mobile-angular-ui',
'mobile-angular-ui.gestures'
]);
app.config(function($routeProvider, $locationProvider) {
$routeProvider
.when("/", {
templateUrl : "src/home/home.html"
});
$locationProvider.html5Mode({enabled:true, requireBase:false});
});
app.directive('dragItem', ['$drag', function($drag) {
return {
controller: function($scope, $element) {
$drag.bind($element,
{
transform: $drag.TRANSLATE_BOTH,end: function(drag) {
drag.reset();
}
},
{
sensitiveArea: $element.parent()
}
);
}
};
}]);
app.controller('MainController', function($rootScope, $scope, $routeParams) {
$scope.msg="Welcome to Tutorialspoint!"
$scope.js="JavaScript is a lightweight, interpreted programming language. It is designed
for creating network-centric applications. It is
complimentary to and integrated with Java.
JavaScript is very easy to implement because it
is integrated with HTML. It is open and cross-platform.";
$scope.angularjs="AngularJS is a very powerful
JavaScript Framework. It is used in Single Page
Application (SPA) projects. It extends HTML DOM
with additional attributes and makes it more
responsive to user actions. AngularJS is open
source, completely free, and used by thousands of
developers around the world. It is licensed under the Apache license version 2.0.";
$scope.reactjs="React is a front-end library
developed by Facebook. It is used for handling
the view layer for web and mobile apps. ReactJS
allows us to create reusable UI components. It is
currently one of the most popular JavaScript
libraries and has a strong foundation and large community behind it.";
});
拖拽元素添加到 src/home/home.html 中 −
<div style="height: 100%; width: 100%; padding: 40px;">
<div style="height: 100%; width: 100%; border: 1px solid #444; position: relative;">
<div drag-Item>
<img src="src/img/test.png" width="100" height="100" />
</div>
</div>
</div>
使用图像进行拖动，如下所示 −
浏览器中的显示如下 −
您可以在 UI 中拖动图像，一旦鼠标被释放，它将重置回原始位置，因为我们在 end 函数 中使用了 drag.reset()。
$drag.bind($element, {
transform: $drag.TRANSLATE_BOTH,
end: function(drag) {
drag.reset();
}
},
{
sensitiveArea: $element.parent()
}
);
