本文实例讲述了AngularJS实现的鼠标拖动画矩形框。分享给大家供大家参考，具体如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
html {color: #000;overflow-y: scoll;overflow: -moz-scrollbars-vertical}
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td {
margin: 0;
padding: 0;
overflow: hidden;
}
#longzhoufeng {
position: relative;
left: 0;
top: 0;
margin: 0 auto;
padding: 0;
width: 800px;
min-height: 800px;
overflow: auto;
height: 1000px;
background-color: #e9e9e9;
}
.dashed-box {
position: absolute;
border: 1px dashed red;
width: 0px;
height: 0px;
left: 0px;
top: 0px;
overflow: hidden;
}
#moving_box {
border: 2px solid red;
}
.question-box {
position: absolute;
/* older safari/Chrome browsers */
-webkit-opacity: 0.5;
/* Netscape and Older than Firefox 0.9 */
-moz-opacity: 0.5;
/* Safari 1.x (pre WebKit!) 老式khtml内核的Safari浏览器*/
-khtml-opacity: 0.5;
/* IE9 + etc...modern browsers */
opacity: .5;
/* IE 4-9 */
filter: alpha(opacity=50);
/*This works in IE 8 & 9 too*/
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
/*IE4-IE9*/
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=50);
}
.question-border {
border: 2px dashed red;
overflow: hidden;
z-index: 1;
}
.del-box {
width: 20px;
height: 20px;
float: right;
color: #fff;
position: relative;
margin-top: 1px;
margin-right: 1px;
z-index: 99;
background-color: red;
}
.active-border {
border: 2px solid red;
-webkit-opacity: 0.5;
/* Netscape and Older than Firefox 0.9 */
-moz-opacity: 0.5;
/* Safari 1.x (pre WebKit!) 老式khtml内核的Safari浏览器*/
-khtml-opacity: 0.5;
/* IE9 + etc...modern browsers */
opacity: .5;
/* IE 4-9 */
filter: alpha(opacity=50);
/*This works in IE 8 & 9 too*/
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
/*IE4-IE9*/
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=50);
}
.box-background-image {
position: absolute;
width: 1000px;
height: 1600px;
}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/angular.js/1.0.5/angular.min.js"></script>
<script>
var app = angular.module('miniapp', []);
function AppController($scope, $timeout) {
//阻止默认行为
function stopDefault(e) {
if(e && e.preventDefault)
e.preventDefault();
else
window.event.returnValue = false;
return false;
}
$scope.bgImg = '1.jpg';
$scope.getBoxPicSize = function() {
$scope.bgWidth = angular.element(".box-background-image").width();
$scope.bgHeight = angular.element(".box-background-image").height();
}
///////////////////////////////////////
var wId = "num";
var index = 0;
var target = null;
var startX = 0, startY = 0;
var flag = false;
var startL = 0, startT = 0, boxHeight = 0, boxWidth = 0;
var boxObj = document.getElementById("longzhoufeng");
var frame = $("#longzhoufeng");
var frameBox = {
"pos": frame.offset(),
"width": frame.outerWidth(),
"height": frame.outerHeight()
}
var newMarkPos = {
"left": startL,//按下时鼠标距离的左边的距离
"top": startT//按下时鼠标距离的上边的距离
}
var myEvent = $scope.myEvent = {
//鼠标点击
mouseDown: function(e) {
flag = true;
var e = window.event || e;
target = e.target || e.srcElement; //获取document 对象的引用
//e.pageY，e.pageX兼容
if(target.src) {
stopDefault(e)
}
var scrollTop = boxObj.scrollTop;
var scrollLeft = boxObj.scrollLeft;
var ePageX = e.clientX + scrollLeft;
var ePageY = e.clientY + scrollTop;
//按下时鼠标距离页面的距离
startX = ePageX;
startY = ePageY;
//按下时鼠标距离的左边和上边的距离
startL = startX - frameBox.pos.left;
startT = startY - frameBox.pos.top;
index++;
var div = document.createElement("div");
div.id = wId + index;
div.className = "dashed-box";
boxObj.appendChild(div);
div = null;
// 如果鼠标在 box 上被按下
if(target.className.match(/del-box/i)) {
// 允许拖动
flag = false;
// 设置当前 box 的 id 为 moving_box
var movingBox = document.getElementById("moving_box")
if(movingBox !== null) {
movingBox.removeAttribute("id");
}
target.id = "moving_box";
// removeBox(target);
} else {
var div = document.createElement("div");
div.id = wId + index;
div.className = "dashed-box";
boxObj.appendChild(div);
div = null;
}
},
//鼠标离开
mouseUp: function(e) {
var e = window.event || e;
if(boxWidth >= 1 || boxHeight >= 1) {
boxObj.removeChild(dragBox(wId + index));
index++;
var div = document.createElement("div");
div.className = "question-box question-border";
div.style.left = newMarkPos.left + "px";
div.style.top = newMarkPos.top + "px";
div.style.width = boxWidth + "px";
div.style.height = boxHeight + "px";
boxObj.appendChild(div);
div = null;
boxWidth = 0;
boxHeight = 0;
} else {
if(flag) {
boxObj.removeChild(dragBox(wId + index));
}
}
flag = false;
},
//鼠标移动
mouseMove: function(e) {
var e = window.event || e;
stopDefault(e)
if(flag) {
var scrollTop = boxObj.scrollTop;
var scrollLeft = boxObj.scrollLeft;
var ePX = e.clientX + scrollLeft;
var ePY = e.clientY + scrollTop;
var disW = ePX - startX;
var disH = ePY - startY;
var L = startL + disW;
var T = startT + disH;
if(disW > 0) {
if(L >= 0) {
boxWidth = disW
}
newMarkPos.left = startL;
} else {
if(L <= 0) {
L = 0;
boxWidth = startL;
}
boxWidth = (startL - L);
newMarkPos.left = L;
}
if(disH > 0) {
if(T >= 0) {
boxHeight = disH
}
newMarkPos.top = startT;
} else {
if(T <= 0) {
T = 0;
boxHeight = startT;
}
boxHeight = (startT - T)
newMarkPos.top = T;
}
dragBox(wId + index).style.left = newMarkPos.left + "px";
dragBox(wId + index).style.top = newMarkPos.top + "px";
dragBox(wId + index).style.width = Math.abs(boxWidth) + "px";
dragBox(wId + index).style.height = Math.abs(boxHeight) + "px";
if(e.srcElement.src) {
stopDefault(e)
}
}
}
}
var dragBox = function(id) {
return document.getElementById(id);
}
}
//等待图片加载完成
app.directive("loadImage", function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
element.bind('load', function() {
scope.$apply(attrs.loadImage);
});
}
}
})
</script>
</head>
<body>
<div ng-app="miniapp" ng-controller="AppController">
<div class="main">
<div id="longzhoufeng" ng-mousedown="myEvent.mouseDown($event)" ng-mouseup="myEvent.mouseUp($event)" ng-mousemove="myEvent.mouseMove($event)">
<img ng-src="{{bgImg}}" class="box-background-image" load-image="getBoxPicSize()">
</div>
</div>
</div>
</body>
</html>
感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具：http://tools.zyiz.net/code/HtmlJsRun测试上述代码运行效果。
更多关于AngularJS相关内容感兴趣的读者可查看本站专题：《AngularJS指令操作技巧总结》、《AngularJS入门与进阶教程》及《AngularJS MVC架构总结》
希望本文所述对大家AngularJS程序设计有所帮助。
