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         progress_area = None
  18         browser = None
  19         window = None
  20         cancel_download_and_run = None
  21         policy = None
  22
  23         def __init__(self, policy, widgets, download_only):
  24                 self.policy = policy
  25
  26                 policy.watchers.append(lambda: self.window.set_response_sensitive(gtk.RESPONSE_OK, policy.solver.ready))
  27
  28                 self.window = widgets.get_widget('main')
  29                 self.window.set_default_size(gtk.gdk.screen_width() * 2 / 5, 300)
  30
  31                 self.progress = widgets.get_widget('progress')
  32                 self.progress_area = widgets.get_widget('progress_area')
  33
  34                 widgets.get_widget('stop').connect('clicked', lambda b: policy.handler.abort_all_downloads())
  35
  36                 cache = widgets.get_widget('show_cache')
  37                 cache.connect('clicked',
  38                         lambda b: os.spawnlp(os.P_WAIT, sys.argv[0], sys.argv[0], '-c'))
  39
  40                 self.refresh_button = widgets.get_widget('refresh')
  41
  42                 # Tree view
  43                 self.browser = InterfaceBrowser(policy, widgets)
  44
  45                 prefs = widgets.get_widget('preferences')
  46                 self.window.action_area.set_child_secondary(prefs, True)
  47
  48                 # Glade won't let me add this to the template!
  49                 if download_only:
  50                         run_button = dialog.MixedButton("_Download", gtk.STOCK_EXECUTE, button = gtk.ToggleButton())
  51                 else:
  52                         run_button = dialog.MixedButton("_Run", gtk.STOCK_EXECUTE, button = gtk.ToggleButton())
  53                 self.window.add_action_widget(run_button, gtk.RESPONSE_OK)
  54                 run_button.show_all()
  55                 run_button.set_flags(gtk.CAN_DEFAULT)
  56
  57                 self.window.set_default_response(gtk.RESPONSE_OK)
  58                 self.window.default_widget.grab_focus()
  59
  60                 def response(dialog, resp):
  61                         if resp in (gtk.RESPONSE_CANCEL, gtk.RESPONSE_DELETE_EVENT):
  62                                 self.window.destroy()
  63                                 sys.exit(1)
  64                         elif resp == gtk.RESPONSE_OK:
  65                                 if self.cancel_download_and_run:
  66                                         self.cancel_download_and_run.trigger()
  67                                 if run_button.get_active():
  68                                         self.cancel_download_and_run = tasks.Blocker("cancel downloads")
  69                                         self.download_and_run(run_button, self.cancel_download_and_run)
  70                         elif resp == gtk.RESPONSE_HELP:
  71                                 gui_help.display()
  72                         elif resp == SHOW_PREFERENCES:
  73                                 import preferences
  74                                 preferences.show_preferences(policy)
  75                 self.window.connect('response', response)
  76
  77         def destroy(self):
  78                 self.window.destroy()
  79
  80         def show(self):
  81                 self.window.show()
  82
  83         def set_response_sensitive(self, response, sensitive):
  84                 self.window.set_response_sensitive(response, sensitive)
  85
  86         @tasks.async
  87         def download_and_run(self, run_button, cancelled):
  88                 try:
  89                         downloaded = self.policy.download_uncached_implementations()
  90
  91                         if downloaded:
  92                                 # We need to wait until everything is downloaded...
  93                                 blockers = [downloaded, cancelled]
  94                                 yield blockers
  95                                 tasks.check(blockers)
  96
  97                                 if cancelled.happened:
  98                                         return
  99
 100                         if self.policy.get_uncached_implementations():
 101                                 dialog.alert(self.window, 'Not all downloads succeeded; cannot run program.')
 102                         else:
 103                                 from zeroinstall.injector import selections
 104                                 sels = selections.Selections(self.policy)
 105                                 doc = sels.toDOM()
 106                                 reply = doc.toxml('utf-8')
 107                                 sys.stdout.write(('Length:%8x\n' % len(reply)) + reply)
 108                                 self.window.destroy()
 109                                 sys.exit(0)                     # Success
 110                 except SafeException, ex:
 111                         run_button.set_active(False)
 112                         self.policy.handler.report_error(ex)
 113                 except SystemExit:
 114                         raise
 115                 except Exception, ex:
 116                         run_button.set_active(False)
 117                         import traceback
 118                         traceback.print_exc()
 119                         self.policy.handler.report_error(ex)
 120
 121         def update_download_status(self):
 122                 """Called at regular intervals while there are downloads in progress,
 123                 and once at the end. Update the display."""
 124                 monitored_downloads = self.policy.handler.monitored_downloads
 125
 126                 self.browser.update_download_status()
 127
 128                 if not monitored_downloads:
 129                         self.progress_area.hide()
 130                         return
 131
 132                 self.progress_area.show()
 133
 134                 any_known = False
 135                 done = total = self.policy.handler.total_bytes_downloaded       # Completed downloads
 136                 n_downloads = self.policy.handler.n_completed_downloads
 137                 # Now add downloads in progress...
 138                 for x in monitored_downloads.values():
 139                         if x.status != download.download_fetching: continue
 140                         n_downloads += 1
 141                         if x.expected_size:
 142                                 any_known = True
 143                         so_far = x.get_bytes_downloaded_so_far()
 144                         total += x.expected_size or max(4096, so_far)   # Guess about 4K for feeds/icons
 145                         done += so_far
 146
 147                 progress_text = '%s / %s' % (pretty_size(done), pretty_size(total))
 148                 if n_downloads == 1:
 149                         self.progress.set_text('Downloading one file (%s)' % progress_text)
 150                 else:
 151                         self.progress.set_text('Downloading %d files (%s)' % (n_downloads, progress_text))
 152
 153                 if total == 0 or (n_downloads < 2 and not any_known):
 154                         self.progress.pulse()
 155                 else:
 156                         self.progress.set_fraction(float(done) / total)
 157
 158 gui_help = help_box.HelpBox("Injector Help",
 159 ('Overview', """
 160 A program is made up of many different components, typically written by different \
 161 groups of people. Each component is available in multiple versions. The injector is \
 162 used when starting a program. Its job is to decide which implementation of each required \
 163 component to use.
 164
 165 An interface describes what a component does. The injector starts with \
 166 the interface for the program you want to run (like 'The Gimp') and chooses an \
 167 implementation (like 'The Gimp 2.2.0'). However, this implementation \
 168 will in turn depend on other interfaces, such as 'GTK' (which draws the menus \
 169 and buttons). Thus, the injector must choose implementations of \
 170 each dependency (each of which may require further interfaces, and so on)."""),
 171
 172 ('List of interfaces', """
 173 The main window displays all these interfaces, and the version of each chosen \
 174 implementation. The top-most one represents the program you tried to run, and each direct \
 175 child is a dependency. The 'Fetch' column shows the amount of data that needs to be \
 176 downloaded, or '(cached)' if it is already on this computer.
 177
 178 If you are happy with the choices shown, click on the Download (or Run) button to \
 179 download (and run) the program."""),
 180
 181 ('Choosing different versions', """
 182 To control which implementations (versions) are chosen you can click on Preferences \
 183 and adjust the network policy and the overall stability policy. These settings affect \
 184 all programs run using Zero Install.
 185
 186 Alternatively, you can edit the policy of an individual interface by selecting it \
 187 and clicking on the 'Interface Properties' button. \
 188 See that dialog's help text for more information.
 189
 190 Right-click on an interface in the list for a menu.
 191 """),
 192
 193 ('Reporting bugs', """
 194 To report a bug, right-click over the interface which you think contains the problem \
 195 and choose 'Report a Bug...' from the menu. If you don't know which one is the cause, \
 196 choose the top one (i.e. the program itself). The program's author can reassign the \
 197 bug if necessary, or switch to using a different version of the library.
 198 """),
 199
 200 ('The cache', """
 201 Each version of a program that is downloaded is stored in the Zero Install cache. This \
 202 means that it won't need to be downloaded again each time you run the program. Click on \
 203 the 'Show Cache' button to see what is currently in the cache, or to remove versions \
 204 you no longer need to save disk space."""),
 205 )