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 %}{% 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 %}{% endif %}>{{ message }}</p> {% endfor %} {% endif %} <div> <div> <p>点击原图 选择剪切区域</p> <div> <img src="{{vir_path}}" id="photo" alt="30"/> </div> </div> <div> <p>预览选择区域</p> <div> <div id="preview"> <img src="{{vir_path}}" alt="300"/> </div> </div> <form action="" method="POST">{% csrf_token %} <table> <thead> <tr> <th colspan="2"> 剪切坐标 </th> <th colspan="2"> 剪切尺寸 </th> </tr> </thead> <tbody> <tr> <td><b>X<sub>1</sub>:</b></td> <td>{{form.x1}}</td> <td><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></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。
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