Add Python picture.py example

examples/picture.py

@@ -0,0 +1,94 @@
+#!/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
+  * ScrollUp/ScrollDown/Double click : display next picture
+  * Right click : exit
+'''
+
+import urllib.request
+import sys
+import signal
+from genericmonitor import *
+
+
+def signal_handler(sig, frame):
+    sys.exit(0)
+signal.signal(signal.SIGINT, signal_handler)
+
+class PicturePopup(GenericMonitor):
+
+    def __init__(self):
+        self.scrolling = False
+        self.item = None
+        self.imgs_idx = 0
+        self.setupMonitor()
+        self.display_next_img()
+        self.runMainLoop()
+
+    def display_next_img(self):
+        filedata = urllib.request.urlopen('https://source.unsplash.com/random')
+        # Get redirected URL without parameters
+        url = filedata.url.split('?')[0]
+        filedata = urllib.request.urlopen(url + '?fit=max&width=500&height=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(url, 'color:white;font-weight:bold')
+        picture_widget = GenericMonitorPictureWidget('/tmp/cat2.jpg')
+        popup = GenericMonitorPopup([url_widget, picture_widget])
+        signals = {
+            'on-click':'toggle-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 sender == self.item.getFullName()
+
+    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()
+
+picture = PicturePopup()