Django imgareaselect手动剪切头像实现方法

本文实例讲述了Django imgareaselect手动剪切头像的方法。分享给大家供大家参考。具体如下：

index.html:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>上传图片</title>
</head>
<body>
<form action="." method="post" enctype="multipart/form-data">{% csrf_token %}
  <table border="0">
    {{form.as_table}}
    <tr>
      <td></td>
      <td><input type="submit" value="上传"/></td>
    </tr>
  </table>
</form>
</body>
</html>

show.html:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>HTML5的标题</title>
<style>
ul {width:80%;padding:5px;}
li{list-style:none;float:left;padding:5px;margin:5px;background-color:#ccc;}
.info{color:green;}
</style>
</head>
<body>
  <p><a href="{%url headhat_index%}">继续上传头像</a></p>
  {% if messages %}
    {% for message in messages %}
      <p{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</p>
    {% endfor %}
  {% endif %}
<ul>
  {%for p in photos%}
  <li><img src="{{path}}{{p.photo_name}}" alt="big"/><br/>
    <img src="{{path}}{{p.photo_thumb}}" alt="thumb"/> <a href="{%url headhat_cut p.id%}">继续剪切</a>
  </li>
  {%endfor%}
</ul>
</body>
</html>

cut.html:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>剪切</title>
<link rel="stylesheet" type="text/css" href="/static/jquery.imgareaselect-0.9.3/css/imgareaselect-default.css" />
<style rel="stylesheet" type="text/css" >
.area {
background:none repeat scroll 0 0 #EEEEFF;
border:2px solid #DDDDEE;
padding:0.6em 0.6em 1em 0.6em;
width:85%;
display:block;
margin-bottom:1em;
}
div.frame {
background:none repeat scroll 0 0 #FFFFFF;
border:2px solid #DDDDDD;
padding:0.4em;
}
.info{color:green;}
</style>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.imgareaselect.min.js"></script>
<script type="text/javascript">
function preview(img, selection) {
  if (!selection.width || !selection.height)
    return;
  var scaleX = 100 / selection.width;
  var scaleY = 100 / selection.height;
  $('#preview img').css({
    width: Math.round(scaleX * 300),
    height: Math.round(scaleY * 300),
    marginLeft: -Math.round(scaleX * selection.x1),
    marginTop: -Math.round(scaleY * selection.y1)
  });
  $('#id_x1').val(selection.x1);
  $('#id_y1').val(selection.y1);
  $('#id_x2').val(selection.x2);
  $('#id_y2').val(selection.y2);
  $('#id_w').val(selection.width);
  $('#id_h').val(selection.height);
}
$(function (){
  $('#id_x1').val(100);
  $('#id_y1').val(100);
  $('#id_x2').val(200);
  $('#id_y2').val(200);
  $('#id_w').val(100);
  $('#id_h').val(100);
  $('#photo').imgAreaSelect({ aspectRatio: '1:1', handles: true,
            fadeSpeed: 200, minHeight:100,minWidth:100,onSelectChange: preview,
            x1: 100, y1: 100, x2: 200, y2: 200
  });
});
</script>
</head>
<body>
<h3>头像剪切 <a href="{%url headhat_index%}"><b>返回</b></a> </h3>
{% if messages %}
  {% for message in messages %}
  <p{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</p>
  {% endfor %}
  {% endif %}
<div class="area">
<div style="float: left; width: 45%;">
  <p class="instructions">点击原图 选择剪切区域</p>
  <div style="margin: 0pt 0.3em; width: 300px; height: 300px;" class="frame">
    <img src="{{vir_path}}" id="photo" alt="30"/>
  </div>
</div>
<div style="float: left; width: 40%; padding-top:50px;">
  <p style="font-size: 110%; font-weight: bold; padding-left: 0.1em;">预览选择区域</p>
  <div style="margin: 0pt 1em; width: 100px; height: 100px;" class="frame">
    <div style="width: 100px; height: 100px; overflow: hidden;" id="preview">
      <img style="width: 244px; height: 244px; margin-left: -71px; margin-top: -54px;" src="{{vir_path}}" alt="300"/>
    </div>
  </div>
  <form action="" method="POST">{% csrf_token %}
  <table style="margin-top: 1em;">
  <thead>
  <tr>
  <th style="font-size: 110%; font-weight: bold; text-align: left; padding-left: 0.1em;" colspan="2">
  剪切坐标
  </th>
  <th style="font-size: 110%; font-weight: bold; text-align: left; padding-left: 0.1em;" colspan="2">
  剪切尺寸
  </th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td style="width: 10%;"><b>X<sub>1</sub>:</b></td>
  <td style="width: 30%;">{{form.x1}}</td>
  <td style="width: 20%;"><b>宽度:</b></td>
  <td>{{form.w}}</td>
  </tr>
  <tr>
  <td><b>Y<sub>1</sub>:</b></td>
  <td>{{form.y1}}</td>
  <td><b>高度:</b></td>
  <td>{{form.h}}</td>
  </tr>
  <tr>
  <td><b>X<sub>2</sub>:</b></td>
  <td>{{form.x2}}</td>
  <td></td>
  <td></td>
  </tr>
  <tr>
  <td><b>Y<sub>2</sub>:</b></td>
  <td>{{form.y2}}</td>
  <td></td>
  <td><input type="submit" value="保存"/></td>
  </tr>
  </tbody>
  </table>
  </form>
</div>
<div style="clear:left;"></div>
</div>
</body>
</html>

forms.py:

#coding=utf-8
from django import forms
class PhotoForm(forms.Form):
  photo_name = forms.ImageField(label=u"头像")
class HatHeadCutForm(forms.Form):
  x1=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))
  y1=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))
  x2=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))
  y2=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))
  w=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))
  h=forms.IntegerField(widget=forms.TextInput(attrs={'size': 4,}))

models.py:

#coding=utf-8
from django.db import models
class Photo(models.Model):
  photo_name=models.CharField(u"图片路径",max_length=255)
  photo_thumb=models.CharField(u"图片缩略图",max_length=255)

views.py:

#coding=utf-8
from django.core.urlresolvers import reverse
from django.shortcuts import render_to_response, get_object_or_404
from django.http import HttpResponse,HttpResponseRedirect
from django.template import RequestContext
from django.contrib import messages
import os,uuid,ImageFile,Image
from PhotoCut.headhat.forms import PhotoForm,HatHeadCutForm
from PhotoCut.headhat.models import Photo
from PhotoCut.settings import MEDIA_ROOT,HEADHAT_ABS_PATH,HEADHAT_VIR_PATH
def index(request,templates="headhat/index.html"):
  template_var={}
  form=PhotoForm()
  if request.method=="POST":
    form = PhotoForm(request.POST.copy(),request.FILES)
    if form.is_valid():
      file=request.FILES.get("photo_name",None)
      if file:
        p=ImageFile.Parser()
        for c in file.chunks():
          p.feed(c)
        img=p.close()
        if img.mode != 'RGBA':
          img = img.convert('RGBA')
        if img.size[0]>img.size[1]:
          offset=int(img.size[0]-img.size[1])/2
          img=img.crop((offset,0,int(img.size[0]-offset),img.size[1]))
        else:
          offset=int(img.size[1]-img.size[0])/2
          img=img.crop((0,offset,img.size[0],(img.size[1]-offset)))
        img.thumbnail((300, 300))
        file_name="%s.jpg"%str(uuid.uuid1())
        img.save(os.path.join(HEADHAT_ABS_PATH,file_name),"JPEG",quality=100)
        messages.info(request,u"上传成功！")
        p=Photo.objects.create(photo_name=file_name)
        p.save()
        return HttpResponseRedirect(reverse("headhat_cut",kwargs={"id":p.id}))
  template_var["form"]=form
  return render_to_response(templates,template_var,context_instance=RequestContext(request))
def cut(request,id,templates="headhat/cut.html"):
  template_var={}
  p=get_object_or_404(Photo,pk=int(id))
  if not p.photo_name:
    messages.info(request,u"请先上传图片！")
    return HttpResponseRedirect(reverse("headhat_index"))
  template_var["vir_path"]=os.path.join(HEADHAT_VIR_PATH,p.photo_name)
  form=HatHeadCutForm()
  if request.method=='POST':
    form=HatHeadCutForm(request.POST)
    if form.is_valid():
      try:
        img=Image.open(os.path.join(HEADHAT_ABS_PATH,p.photo_name))
      except IOError:
        messages.info(request,u"读取文件错误！")
      data=form.cleaned_data
      img=img.crop((data["x1"],data["y1"],data["x2"],data["y2"]))
      img.thumbnail((50, 50))
      file_name="%s_%s"%(os.path.splitext(p.photo_name)[0],"_50_50.jpg")
      img.save(os.path.join(HEADHAT_ABS_PATH,file_name),"JPEG",quality=100)
      p.photo_thumb=file_name
      p.save()
      messages.info(request,u"剪切成功！")
      return HttpResponseRedirect(reverse("headhat_show"))
    else:
      messages.info(request,u"请剪切后 再保存！")
  template_var["form"]=form
  return render_to_response(templates,template_var,context_instance=RequestContext(request))
def show(request,templates="headhat/show.html"):
  template_var={}
  photos=Photo.objects.all()
  template_var["path"]=HEADHAT_VIR_PATH
  template_var["photos"]=photos
  return render_to_response(templates,template_var,context_instance=RequestContext(request))

希望本文所述对大家的Python程序设计有所帮助。