jquery imgareaselect 使用利用js与程序结合实现图片剪切

196 阅读 0 评论 130 点赞

我是靠谱客的博主优雅汽车，最近开发中收集的这篇文章主要介绍jquery imgareaselect 使用利用js与程序结合实现图片剪切，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复制代码代码如下:

 
/* 
缺陷，当前在ff3下，用jquery的 width()与height()函数，在不设置图片的宽度与高度的时候，不能取到 
需要在图片load函数里面初始化才可以 
*/ 
sanshi_imgareaselect = function(pic_id,view_div_id){ 
    this.pic_obj = jQuery("#"+pic_id); 
    this.pic_width; 
    this.pic_height; 
    this.view_div_id = view_div_id; 
    this.view_width = 100; 
    this.view_height = 100; 
    this.view_img_id = view_div_id+"_sanshi_img"; 
    this.ias; 
} 
//建立预览图片 
sanshi_imgareaselect.prototype.make_view_pic =function(){ 
    var img_obj = jQuery(document.createElement("IMG")); 
        img_obj.attr("src",this.pic_obj.attr("src")); 
        img_obj.attr("id",this.view_img_id); 
        img_obj.attr("width",this.view_width); 
        img_obj.attr("height",this.view_height); 
        return img_obj; 
} 
//初始化函数 
sanshi_imgareaselect.prototype.init=function(){ 
    this.pic_width = this.pic_obj.attr("width"); 
    this.pic_height = this.pic_obj.attr("height"); 
    //alert(this.pic_width+":"+this.pic_height); 
    //添加图片 
    jQuery("#"+this.view_div_id).append(this.make_view_pic()); 
    //设置预览加载层样式 
    jQuery("#"+this.view_div_id).css({'width':this.view_width,'height':this.view_height,'overflow':'hidden'}); 
    //构造选择区域完成的函数 
    var fun_str="if ( selection.width && selection.height){ var scaleX = "+this.view_width+" / selection.width;var scaleY = "+this.view_height+" / selection.height;jQuery('#"+this.view_img_id+"').css({width: Math.round(scaleX * "+this.pic_width+"),height: Math.round(scaleY * "+this.pic_height+"),marginLeft: -Math.round(scaleX * selection.x1),marginTop: -Math.round(scaleY * selection.y1)});}"; 
    //alert(fun_str); 
    //初始化imgAreaSelect 函数 
    var ias = this.pic_obj.imgAreaSelect({ 
        //设置选择框的比列 
        //aspectRatio:"1:1", 
        //设置框的添加效果 
        fadeSpeed:200, 
        //选择框选择完毕是否自己取消 
        autoHide:false, 
        //是否显示图片遮罩层 
        show:true, 
        //是否采用api 
        instance: true, 
        //设置初始函数 画出选择框 
        onInit:function(img, selection){ias.setSelection(100, 50, 250, 150, true);ias.update();}, 
        //设置选择完毕的函数，采用了动态执行 
        onSelectEnd:function(img, selection){eval(fun_str);} 
        }); 
    //赋值给全局 
    this.ias = ias; 
} 
//保存事件 采用的是get方式提交 
sanshi_imgareaselect.prototype.save_pic=function(post_page,post_param){ 
    var opt = this.ias.getSelection(true); 
    var post_arr = new Array(); 
    jQuery.each(post_param,function(i,n){ 
        var temp_str =i+"="; 
        temp_str += opt[n] ? opt[n] : n; 
        post_arr.push(temp_str); 
    }); 
    //判断，是否有参数 
    post_page += post_page.lastIndexOf("?")<0 ? "?" : "&"; 
    //拼装get方式的url 
    post_url = post_page+post_arr.join("&"); 
    alert(post_url); 
} 

这个是封装后js代码
下面看看这段代码如何使用

复制代码代码如下:

 
$(document).ready(function () { 

    //声明函数 
    var sanshi_img = new sanshi_imgareaselect("mypic","preview"); 
    //确保图片加载完成执行初始化函数，这样避免上面的提到的bug，否则不能保证兼容性 
    $("#mypic").load(function(){sanshi_img.init();}); 
    //监听保存事件 
    $("#save_pic").click(function(){ 
        sanshi_img.save_pic('1.php?n=6',{"id":5,"px1":"x1","py1":"y1",'px2':"x2","py2":"y2",'pwidth':"width",'pheight':"height"}); 
    }); 
}) 

下面看下html代码

复制代码代码如下:

 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<link rel="stylesheet" type="text/css" href="css/imgareaselect-animated.css" href="css/imgareaselect-animated.css" /> 
<script type="text/javascript" src="jquery-1.3.2.min.js" src="jquery-1.3.2.min.js"></script> 
<script type="text/javascript" src="scripts/jquery.imgareaselect.pack.js" src="scripts/jquery.imgareaselect.pack.js"></script> 
</head> 
<body> 
<div id="s"> 
<img id="mypic" name="mypic" dt="sanshi" src="scott-h-biram.jpg" src="scott-h-biram.jpg" title="mypic"/> 
</div> 
<div id="preview"></div> 
<div><input type="button" id="save_pic" value="保存"></div> 
</body> 
</html> 