zeroinstall/0launch-gui/gui.py

   1 import gtk, os, gobject, sys
   2
   3 from zeroinstall.injector.iface_cache import iface_cache
   4 from zeroinstall.injector.policy import Policy
   5 from zeroinstall.injector import download, handler
   6 from zeroinstall.injector.model import SafeException
   7 from zeroinstall.injector.reader import InvalidInterface
   8 from zeroinstall.support import tasks, pretty_size
   9 import dialog
  10
  11 version = '0.31'
  12
  13 class GUIHandler(handler.Handler):
  14         dl_callbacks = None             # Download -> [ callback ]
  15         pulse = None
  16         mainwindow = None
  17
  18         def downloads_changed(self):
  19                 if self.monitored_downloads and self.pulse is None:
  20                         def pulse():
  21                                 progress = self.mainwindow.progress
  22
  23                                 any_known = False
  24                                 done = total = self.total_bytes_downloaded      # Completed downloads
  25                                 n_downloads = self.n_completed_downloads
  26                                 # Now add downloads in progress...
  27                                 for x in self.monitored_downloads.values():
  28                                         if x.status != download.download_fetching: continue
  29                                         n_downloads += 1
  30                                         if x.expected_size:
  31                                                 any_known = True
  32                                         so_far = x.get_bytes_downloaded_so_far()
  33                                         total += x.expected_size or max(4096, so_far)   # Guess about 4K for feeds/icons
  34                                         done += so_far
  35
  36                                 progress_text = '%s / %s' % (pretty_size(done), pretty_size(total))
  37                                 if n_downloads == 1:
  38                                         progress.set_text('Downloading one file (%s)' % progress_text)
  39                                 else:
  40                                         progress.set_text('Downloading %d files (%s)' % (n_downloads, progress_text))
  41
  42                                 if total == 0 or (n_downloads < 2 and not any_known):
  43                                         progress.pulse()
  44                                 else:
  45                                         progress.set_fraction(float(done) / total)
  46
  47                                 return True
  48                         pulse()
  49                         self.pulse = gobject.timeout_add(50, pulse)
  50                         self.mainwindow.progress.show()
  51                 elif len(self.monitored_downloads) == 0:
  52                         # Reset counters
  53                         self.n_completed_downloads = 0
  54                         self.total_bytes_downloaded = 0
  55
  56                         # Stop animation
  57                         if self.pulse:
  58                                 gobject.source_remove(self.pulse)
  59                                 self.mainwindow.progress.hide()
  60                                 self.pulse = None
  61
  62         def confirm_trust_keys(self, interface, sigs, iface_xml):
  63                 import trust_box
  64                 return trust_box.confirm_trust(interface, sigs, iface_xml, parent = self.mainwindow.window)
  65
  66         def report_error(self, ex):
  67                 dialog.alert(None, str(ex))