Toga windows and linux desktop app example to download and save images15.01.19

linux req:
cairocffi==0.9.0
certifi==2018.11.29
cffi==1.11.5
chardet==3.0.4
conda==4.3.16
gbulb==0.6.1
idna==2.8
pycosat==0.6.3
pycparser==2.19
PyGObject==3.31.2.dev0
requests==2.21.0
ruamel.yaml==0.15.85
toga==0.3.0.dev11
toga-core==0.3.0.dev11
toga-gtk==0.3.0.dev11
travertino==0.1.2
urllib3==1.24.1

windows req:
arrow==0.13.0
binaryornot==0.4.4
boto3==1.9.79
botocore==1.12.79
briefcase==0.2.8
certifi==2018.11.29
chardet==3.0.4
Click==7.0
cookiecutter==1.6.0
docutils==0.14
future==0.17.1
idna==2.8
Jinja2==2.10
jinja2-time==0.2.0
jmespath==0.9.3
MarkupSafe==1.1.0
poyo==0.4.2
python-dateutil==2.7.5
pythonnet==2.3.0
requests==2.21.0
s3transfer==0.1.13
six==1.12.0
toga==0.3.0.dev11
toga-core==0.3.0.dev11
toga-winforms==0.3.0.dev11
travertino==0.1.2
urllib3==1.23
voc==0.1.6
whichcraft==0.5.2

setup.py file: 
e:
        raise RuntimeError("Unable to find version string.")

with io.open('README.rst', encoding='utf8') as readme:
    long_description = readme.read()

setup(
    name='picture_downloader',
    version=version,
    description='Download Pictures from Foo bar',
    long_description=long_description,
    author='foo',
    author_email='foo@bar.com',
    license='GNU General Public License v3 or later (GPLv3+)',
    packages=find_packages(
        exclude=[
            'docs', 'tests',
            'windows', 'macOS', 'linux',
            'iOS', 'android',
            'django'
        ]
    ),
    classifiers=[
        'Development Status :: 1 - Planning',
        'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
    ],
    install_requires=[
    ],
    options={
        'app': {
            'formal_name': 'foo bar Picture Downloader',
            'bundle': 'com.foo'
        },

# Desktop/laptop deployments
        'macos': {
            'app_requires': [
                'toga-cocoa==0.3.0.dev11',
            ]
        },
        'linux': {
            'app_requires': [
                'toga-gtk==0.3.0.dev11',
            ]
        },
        'windows': {
            'app_requires': [
			'arrow==0.13.0',
'binaryornot==0.4.4',
'boto3==1.9.79',
'botocore==1.12.79',
'briefcase==0.2.8',
'certifi==2018.11.29',
'chardet==3.0.4',
'Click==7.0',
'cookiecutter==1.6.0',
'docutils==0.14',
'future==0.17.1',
'idna==2.8',
'Jinja2==2.10',
'jinja2-time==0.2.0',
'jmespath==0.9.3',
'MarkupSafe==1.1.0',
'poyo==0.4.2',
'python-dateutil==2.7.5',
'pythonnet==2.3.0',
'requests==2.21.0',
's3transfer==0.1.13',
'six==1.12.0',
'toga==0.3.0.dev11',
'toga-core==0.3.0.dev11',
'toga-winforms==0.3.0.dev11',
'travertino==0.1.2',
'urllib3==1.23',
'voc==0.1.6',
'whichcraft==0.5.2'
            ],
            'icon': 'images/windows',
        },

# Mobile deployments
        'ios': {
            'app_requires': [
                'toga-ios==0.3.0.dev11',
            ]
        },
        'android': {
            'app_requires': [
                'toga-android==0.3.0.dev11',
            ]
        },

# Web deployments
        'django': {
            'app_requires': [
                'toga-django==0.3.0.dev11',
            ]
        },
    }
)

app.py file:

import json
import toga
import requests
import threading
import shutil
from toga.style import Pack
from toga.style.pack import COLUMN, ROW, LEFT, RIGHT
from pathlib import Path

class Picture_Downloader(toga.App):
  def startup(self):
    self.action = False
    self.folder = str(Path.home()) + os.path.sep + 'Pictures' +  os.path.sep  + 'Foo'  
    if not os.path.exists(self.folder):
      os.makedirs(self.folder)
    self.img_views = 'http://foo/img'
    # Create a main window with a name matching the app
    self.main_window = toga.MainWindow(title=self.name)
    
    # Create a main content box
    self.button = toga.Button('Download', on_press=self.download,style=Pack(flex=1,padding_left=15,padding_right=15))
    styles = toga.Label('Styles:', style=Pack(text_align=LEFT,flex=1,padding_left=15,padding_right=15))
    sizes = toga.Label('Sizes:', style=Pack(text_align=LEFT,flex=1,padding_left=15,padding_right=15))

logs = toga.Label('Logs:', style=Pack(text_align=LEFT,padding_left=15,padding_right=15,padding_bottom=5,padding_top=5))

self.textarea = toga.MultilineTextInput(id='view1',style=Pack(flex=1,padding_left=15,padding_right=15))

self.selector = toga.Selection(items=['120','150','200','250','350','455','456','500','600','1000','1200','1600','5000'],style=Pack(flex=1,padding_left=15,padding_right=15))
    self.log  = toga.MultilineTextInput(id='view1',readonly=True,style=Pack(flex=1,padding_left=15,padding_right=15))

container = toga.ScrollContainer(content=self.textarea, horizontal=False,style=Pack(flex=1,padding_left=15,padding_right=15))        
    container2 = toga.ScrollContainer(content=self.log, horizontal=False,style=Pack(flex=1,padding_left=15,padding_right=15))

self.progress = toga.ProgressBar()
    self.progress.style.update(padding_left=15,padding_right=15)

#set widgets to the box
    box = toga.Box(style=Pack(direction=COLUMN, padding_top=10))
    box_a = toga.Box(style=Pack(padding_bottom=5))
    box_b = toga.Box(style=Pack(flex=1))
    
    box_a.add(styles)
    box_a.add(sizes)
    box_b.add(container)
    box_b.add(self.selector)
    box.add(box_a)
    box.add(box_b)
    box.add(logs)
    box.add(container2)
    box.add(self.button)
    box.add(self.progress)

self.main_window.content = box
    self.main_window.show()

def download(self, widget):
    if self.action == False:
      self.logging('start...')
      styles = list(set(self.textarea.value.splitlines()))
      self.logging('{} styles entered'.format(len(styles)))
      if len(styles):
        self.progress.value = 0
        self.action = True
        self.logging('trying  access salamander API via post: {}'.format(self.img_views))      
        images = self.set_images(styles)
  
        self.ts = {}
        for i in images:
          self.progress.value += 1
          self.ts[i] = threading.Thread(target=self.download_imgs, args=(i,images[i],), kwargs={})
          self.ts[i].start()
        for i in self.ts:
          self.ts[i].join()
        self.action = False

self.logging('')
        self.logging('')
        self.logging('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx')
        self.logging('{}'.format(self.folder))
        self.logging('check here:')
        self.logging('Completed for size: {}'.format(self.selector.value))

self.logging('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx')
        self.logging('')
        self.logging('')
      else:
        self.logging('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx')
        self.logging('Please enter styles')
        self.logging('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx')

def set_images(self,styles):
    imgs = {}
    try:
      headers = {'content-type': 'application/json'}
      data = {"keys":styles}
      r = requests.post(self.img_views,data=json.dumps(data),headers=headers)
      j = r.json()
      res = {}
      for i in j['rows']:
        imgs[i['key']] = i['value']
    except Exception as e:
       self.logging('failed')
       self.logging(e)
       print(e)
       return False

self.logging('successfully got {}x images urls'.format(len(imgs)))
    size = self.selector.value
    folders = []
    images = {}
    for i in imgs:
      url = imgs[i] 
      sep    = '-{}_'.format('250')
      path   = url.split(sep)
      url    = url.replace(sep,'-{}_'.format(size))
      img    = path[1].split('_')
      folder = '{}{}{}{}{}'.format(self.folder,os.path.sep,size,os.path.sep,img[0])
      image = '{}{}{}'.format(folder,os.path.sep,img[1])
      folders.append(folder)
      images[i] = {'img':image,'url':url}

self.progress.max = 4

folders = set(folders)
    for i in folders:
      if not os.path.exists(i):
        os.makedirs(i)

missing = {}
    for i in images:
      if not os.path.exists(images[i]['img']):
        missing[i] = images[i]
      else:
        self.logging('already downloaded {}'.format(images[i]['img']))

self.progress.max = len(missing)  
    return missing

def download_imgs(self,i,img):
    r = requests.get(img['url'], stream=True)
    if r.status_code == 200:
      with open(img['img'], 'wb') as f:
         r.raw.decode_content = True
         shutil.copyfileobj(r.raw, f)

def logging(self,msg):
    logs = self.log.value.splitlines()
    logs.insert(0, '{} ... {}'.format(datetime.datetime.now().replace(microsecond=0),msg))
    self.log.value = '\n'.join(logs).strip("\n")

def main():
  path = os.path.dirname(os.path.abspath(__file__))
  return Picture_Downloader('Foo Bar - Picture Downloader', 'com.foo.picture_downloader',os.path.join(path, "icons", "icon.png"))

https://briefcase.readthedocs.io/en/latest/tutorial/tutorial-0.html

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Toga windows and linux desktop app example to download and save images15.01.19

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