GnomeShellGenericMonitor/examples/picture.py

#!/usr/bin/env python3

#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

'''
Display random picture from unsplash.com in a popup

  * Click : open/close popup
  * Popup item click : display who clicked
  * ScrollUp/ScrollDown/Double click : display next picture
  * Right click : exit
'''

import urllib.request
import sys
import signal
from genericmonitor import *


class PicturePopup(GenericMonitor):

    def __init__(self):
        self.scrolling = False
        self.item = None
        self.imgs_idx = 0
        self.setupMonitor()

    def run(self):
        self.display_next_img()
        self.runMainLoop()
        
    def display_next_img(self):
        filedata = urllib.request.urlopen('https://picsum.photos/500/500')
        datatowrite = filedata.read()
        with open('/tmp/cat2.jpg', 'wb') as f:
            f.write(datatowrite)
        widget = GenericMonitorTextWidget('#%d' % self.imgs_idx, 'color:purple')
        url_widget = GenericMonitorTextWidget('random_pic', 'color:white;font-weight:bold', signals={'on-click':'signal'}) # No name here
        picture_widget = GenericMonitorPictureWidget('/tmp/cat2.jpg', name='NestedWidget', signals={'on-click':'signal'})
        popup = GenericMonitorPopup([url_widget, picture_widget])
        signals = {
            'on-click':'toggle-popup',
            # Could also use this behavior [bugged since GNOME 42]
            # 'on-enter':'open-popup',
            # 'on-leave':'close-popup',
            'on-dblclick':'signal',
            'on-rightclick':'signal',
            'on-scroll':'signal',
            }
        self.item = GenericMonitorItem('picturepopup', [widget], signals, popup)
        group = GenericMonitorGroup('PicturePopup', [self.item])
        self.notify(group)
        self.imgs_idx += 1
        
    def _forMe(self, sender):
        return str(sender).endswith(self.item.getFullName())

    def onClick(self, sender):
        if not self._forMe(sender): return
        print('Click from {}'.format(sender))

    def _onScroll(self, sender):
        if not self._forMe(sender): return
        if self.scrolling: return
        self.scrolling = True
        self.display_next_img()
        self.scrolling = False
    
    def onScrollUp(self, sender):
        self._onScroll(sender)
        
    def onScrollDown(self, sender):
        self._onScroll(sender)

    def onDblClick(self, sender):
        self.onScrollUp(sender)

    def onRightClick(self, sender):
        if not self._forMe(sender): return
        if self.item:
            self.deleteItems([self.item.getFullName()])
        self.stopMainLoop()

def signal_handler(sig, frame):
    picture.deleteGroups(['PicturePopup'])
    sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)

picture = PicturePopup()
picture.run()