zeroinstall/0launch-gui/mainwindow.py

   1 import gtk
   2 from logging import warn
   3 import os, sys
   4 from zeroinstall import SafeException
   5 from zeroinstall.support import tasks, pretty_size
   6 from zeroinstall.injector import download
   7 from iface_browser import InterfaceBrowser
   8 import help_box
   9 import dialog
  10
  11 tips = gtk.Tooltips()
  12
  13 SHOW_PREFERENCES = 0
  14
  15 class MainWindow:
  16         progress = None
  17         browser = None
  18         window = None
  19         cancel_download_and_run = None
  20         handler = None
  21
  22         def __init__(self, policy, widgets, download_only):
  23                 self.handler = policy.handler
  24
  25                 policy.watchers.append(lambda: self.window.set_response_sensitive(gtk.RESPONSE_OK, policy.solver.ready))
  26
  27                 self.window = widgets.get_widget('main')
  28                 self.window.set_default_size(gtk.gdk.screen_width() * 2 / 5, 300)
  29
  30                 self.progress = widgets.get_widget('progress')
  31
  32                 cache = widgets.get_widget('show_cache')
  33                 cache.connect('clicked',
  34                         lambda b: os.spawnlp(os.P_WAIT, sys.argv[0], sys.argv[0], '-c'))
  35
  36                 widgets.get_widget('refresh').connect('clicked', lambda b: policy.refresh_all())
  37
  38                 # Tree view
  39                 self.browser = InterfaceBrowser(policy, widgets)
  40
  41                 prefs = widgets.get_widget('preferences')
  42                 self.window.action_area.set_child_secondary(prefs, True)
  43
  44                 # Glade won't let me add this to the template!
  45                 if download_only:
  46                         run_button = dialog.MixedButton("_Download", gtk.STOCK_EXECUTE, button = gtk.ToggleButton())
  47                 else:
  48                         run_button = dialog.MixedButton("_Run", gtk.STOCK_EXECUTE, button = gtk.ToggleButton())
  49                 self.window.add_action_widget(run_button, gtk.RESPONSE_OK)
  50                 run_button.show_all()
  51                 run_button.set_flags(gtk.CAN_DEFAULT)
  52
  53                 self.window.set_default_response(gtk.RESPONSE_OK)
  54                 self.window.default_widget.grab_focus()
  55
  56                 def response(dialog, resp):
  57                         if resp in (gtk.RESPONSE_CANCEL, gtk.RESPONSE_DELETE_EVENT):
  58                                 self.window.destroy()
  59                                 sys.exit(1)
  60                         elif resp == gtk.RESPONSE_OK:
  61                                 if self.cancel_download_and_run:
  62                                         self.cancel_download_and_run.trigger()
  63                                 if run_button.get_active():
  64                                         self.cancel_download_and_run = tasks.Blocker("cancel downloads")
  65                                         self.download_and_run(run_button, self.cancel_download_and_run)
  66                         elif resp == gtk.RESPONSE_HELP:
  67                                 gui_help.display()
  68                         elif resp == SHOW_PREFERENCES:
  69                                 import preferences
  70                                 preferences.show_preferences(policy)
  71                 self.window.connect('response', response)
  72
  73         def destroy(self):
  74                 self.window.destroy()
  75
  76         def show(self):
  77                 self.window.show()
  78
  79         def set_response_sensitive(self, response, sensitive):
  80                 self.window.set_response_sensitive(response, sensitive)
  81
  82         @tasks.async
  83         def download_and_run(self, run_button, cancelled):
  84                 try:
  85                         downloaded = policy.download_uncached_implementations()
  86
  87                         if downloaded:
  88                                 # We need to wait until everything is downloaded...
  89                                 blockers = [downloaded, cancelled]
  90                                 yield blockers
  91                                 tasks.check(blockers)
  92
  93                                 if cancelled.happened:
  94                                         policy.abort_all_downloads()
  95                                         return
  96
  97                         if self.policy.get_uncached_implementations():
  98                                 dialog.alert('Not all downloads succeeded; cannot run program.')
  99                         else:
 100                                 from zeroinstall.injector import selections
 101                                 sels = selections.Selections(policy)
 102                                 doc = sels.toDOM()
 103                                 reply = doc.toxml('utf-8')
 104                                 sys.stdout.write(('Length:%8x\n' % len(reply)) + reply)
 105                                 self.window.destroy()
 106                                 sys.exit(0)                     # Success
 107                 except SafeException, ex:
 108                         run_button.set_active(False)
 109                         policy.handler.report_error(ex)
 110                 except Exception, ex:
 111                         run_button.set_active(False)
 112                         import traceback
 113                         traceback.print_exc()
 114                         policy.handler.report_error(ex)
 115
 116         def update_download_status(self):
 117                 """Called at regular intervals while there are downloads in progress,
 118                 and once at the end. Update the display."""
 119                 monitored_downloads = self.handler.monitored_downloads
 120
 121                 if not monitored_downloads:
 122                         self.progress.hide()
 123                         return
 124
 125                 self.progress.show()
 126
 127                 any_known = False
 128                 done = total = self.handler.total_bytes_downloaded      # Completed downloads
 129                 n_downloads = self.handler.n_completed_downloads
 130                 # Now add downloads in progress...
 131                 for x in monitored_downloads.values():
 132                         if x.status != download.download_fetching: continue
 133                         n_downloads += 1
 134                         if x.expected_size:
 135                                 any_known = True
 136                         so_far = x.get_bytes_downloaded_so_far()
 137                         total += x.expected_size or max(4096, so_far)   # Guess about 4K for feeds/icons
 138                         done += so_far
 139
 140                 progress_text = '%s / %s' % (pretty_size(done), pretty_size(total))
 141                 if n_downloads == 1:
 142                         self.progress.set_text('Downloading one file (%s)' % progress_text)
 143                 else:
 144                         self.progress.set_text('Downloading %d files (%s)' % (n_downloads, progress_text))
 145
 146                 if total == 0 or (n_downloads < 2 and not any_known):
 147                         self.progress.pulse()
 148                 else:
 149                         self.progress.set_fraction(float(done) / total)
 150
 151 gui_help = help_box.HelpBox("Injector Help",
 152 ('Overview', """
 153 A program is made up of many different components, typically written by different \
 154 groups of people. Each component is available in multiple versions. The injector is \
 155 used when starting a program. Its job is to decide which implementation of each required \
 156 component to use.
 157
 158 An interface describes what a component does. The injector starts with \
 159 the interface for the program you want to run (like 'The Gimp') and chooses an \
 160 implementation (like 'The Gimp 2.2.0'). However, this implementation \
 161 will in turn depend on other interfaces, such as 'GTK' (which draws the menus \
 162 and buttons). Thus, the injector must choose implementations of \
 163 each dependency (each of which may require further interfaces, and so on)."""),
 164
 165 ('List of interfaces', """
 166 The main window displays all these interfaces, and the version of each chosen \
 167 implementation. The top-most one represents the program you tried to run, and each direct \
 168 child is a dependency. The 'Fetch' column shows the amount of data that needs to be \
 169 downloaded, or '(cached)' if it is already on this computer.
 170
 171 If you are happy with the choices shown, click on the Download (or Run) button to \
 172 download (and run) the program."""),
 173
 174 ('Choosing different versions', """
 175 To control which implementations (versions) are chosen you can click on Preferences \
 176 and adjust the network policy and the overall stability policy. These settings affect \
 177 all programs run using Zero Install.
 178
 179 Alternatively, you can edit the policy of an individual interface by selecting it \
 180 and clicking on the 'Interface Properties' button. \
 181 See that dialog's help text for more information.
 182
 183 Right-click on an interface in the list for a menu.
 184 """),
 185
 186 ('Reporting bugs', """
 187 To report a bug, right-click over the interface which you think contains the problem \
 188 and choose 'Report a Bug...' from the menu. If you don't know which one is the cause, \
 189 choose the top one (i.e. the program itself). The program's author can reassign the \
 190 bug if necessary, or switch to using a different version of the library.
 191 """),
 192
 193 ('The cache', """
 194 Each version of a program that is downloaded is stored in the Zero Install cache. This \
 195 means that it won't need to be downloaded again each time you run the program. Click on \
 196 the 'Show Cache' button to see what is currently in the cache, or to remove versions \
 197 you no longer need to save disk space."""),
 198 )