jquery uses drag and drop to add hotlinks to images

jquery uses drag and drop to add hotlinks to images_jquery

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Release： 2016-05-16 15:30:10

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The example in this article describes the implementation process of using jquery to add hot links to images by dragging and dropping. I would like to share it with you for your reference. The details are as follows:
The screenshot of the running effect is as follows:

According to the requirements of the project, you need to add different links to a picture. For example, the picture is a suite with a sofa, coffee table, wine cabinet, TV cabinet, etc. Then add a hyperlink to these objects and click Then open the introduction of related products.

Written a function to add anchor points to images using jquery. The implementation principle: One text box to write the title, one text box to write the link, one to add the button, and one Edit button. After writing the content, click Add and a P label will appear above the picture. Then press the left button of the mouse and drag the label to the corresponding place and release it. Let’s look at the specific code. .

First import jquery library

<script src="js/jquery/1.11.1/jquery.min.js"></script>

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Build html.

<div class="box">
 <input type="text" name="title">
 <input type="text" name="link" value="http://">
  <input type="button" value="添加链接" id="add">
 <input type="button" value="编辑" id="show">
</div>
<div class="img_box">
 <img src="images/55cc64813c330.jpg">
</div>

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Write CSS . Note that the position of the label here is relative to the position of the image, so the img_box of the image should be added with position: relative;

*{padding: 0; margin: 0;}
.box{margin: 10px;}
.img_box{position: relative;}
.img_box .maodian{position: absolute; padding: 5px 10px; border-right: 5px; background: #000; 
   filter:alpha(opacity=40); 
   -moz-opacity:0.4; 
   opacity:0.4;
   top:10px;
   left:10px;
   color:#FFF;
   font-size: 12px;
   font-family: "宋体";
   cursor: pointer;
}
.maodian a{color: #FFF; text-decoration: none;}

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Write JS

$(function(){
   var obj = null ;//定义标签对象的全局变量，目的用于编辑
   $("#add").click(function(){//绑定添加按钮单击事件
    var title = $("input[name=title]").val();//取得标题内容
    var link = $("input[name=link]").val();//取得超链接
    var html = "<p class='maodian'><a href='"+link+"'>"+title+"</a></p>";组装P标签
    $(".img_box").append(html); //添加到img_box div中，即图片的后面
   });
 
   $(".img_box").delegate(".maodian","mousedown",function(e){//绑定标签鼠标按下事件
    obj = $(this);//把当前标签对象赋值给变量
    if(obj.setCapture){ //用于兼容非准浏览器
     obj.setCapture();
    }
    $("input[name=title]").val(obj.find("a").text());//把点中标签的内容加到标题文本框中
    $("input[name=link]").val(obj.find("a").attr("href"));/把点中标签的链接加到链接本框中
     var _x = e.pageX - obj.offset().left;//取得鼠标到标签左边left的距离
     var _y = e.pageY - obj.offset().top; //取得鼠标到标签顶部top的距离
     var oWidth = $(this).outerWidth(); //取得标签的宽，包括padding
     var oHeight = $(this).outerHeight();//取得标签的高，包括padding
     var x=0,y=0; 定义移动的全局变量
 
     $(".img_box").bind("mousemove",function(e){
      var img_position = $(".img_box").offset(); //取得图片的位置
      x = e.pageX -_x - img_position.left; //计算出移动的x值
      y = e.pageY -_y - img_position.top; //计算出移动的y值
      if(x<0){ //如果移动小于0，证明移到了图片外，应设为0
       x = 0;
      }else if(x>($(".img_box img").width()-oWidth)){
      //如果移动大于图片的宽度减去标签的宽度，证明移到了图片外，应该设为可用的最大值
       x = $(".img_box img").width()-oWidth;
      }
 
      if(y<0){ //同上
       y = 0;
      }else if(y>($(".img_box img").height()-oHeight)){
       y = $(".img_box img").height()-oHeight;
      }
      obj.css({"left":x,"top":y});
     });
 
     $(".img_box").bind("mouseup",function(){ //绑定鼠标左键弹起事件
      $('.img_box').unbind("mousemove"); //移动mousemove事件
      $(this).unbind("mouseup"); //移动mouseup事件
      if(obj.releaseCapture){ //兼容非标准浏览器
      obj.releaseCapture();
     }
      
     });
     return false; //用于选中文字时取消浏览器的默认事件
   });
 
   $(".img_box").delegate(".maodian","dblclick",function(){//绑定双击事件
    $(this).remove(); //删除当前标签
   })
 
   $("#show").click(function(){//绑定编辑按钮
     //更新内容到标签
    obj.find("a").text($("input[name=title]").val()).attr("href",link);
   })
  
   $(".img_box").delegate("a","click",function(){ //取消a标签的单击默认事件
    return false;
   })
 
  })

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The above is the entire content of this article, I hope it will be helpful to everyone’s study.