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:

{% csrf_token %} {{form.as_table}}

show.html:

 
 
继续上传头像
 
  {% if messages %} 
    {% for message in messages %} 
      
{{ message }}
 
    {% endfor %} 
  {% endif %} 

{%for p in photos%}
• 
  继续剪切
{%endfor%}

cut.html:

 
 
头像剪切 返回 
 
{% if messages %} 
  {% for message in messages %} 
  
{{ message }}
 
  {% endfor %} 
  {% endif %} 
 
 
  
点击原图 选择剪切区域
 
  
 
    
 
 
 
  
预览选择区域
 
  
 
    
 
      
 
  
 
  
{% csrf_token %} 
  


 
  剪切坐标 
  
 
  
 
  剪切尺寸 
  
 
  


X1:
 
  
{{form.x1}}
 
  
宽度:
 
  
{{form.w}}
 
  

Y1:
 
  
{{form.y1}}
 
  
高度:
 
  
{{form.h}}
 
  

X2:
 
  
{{form.x2}}
 
  
 
  
 
  

Y2:
 
  
{{form.y2}}
 
  
 
  
 
  


 
 
 
 
 
 

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。