zeroinstall/gtkui/gtkutils.py

   1 """Useful utility methods for GTK."""
   2
   3 # Copyright (C) 2009, Thomas Leonard
   4 # See the README file for details, or visit http://0install.net.
   5
   6 import gtk
   7
   8 class Template:
   9         """Wrapper for GtkBuilder widget tree that throws a sensible exception if the widget isn't found."""
  10         def __init__(self, builderfile, root):
  11                 """Constructor.
  12                 @param builderfile: pathname of the .ui file to load
  13                 @param root: the name of the top-level widget inside the file"""
  14                 self.builder = gtk.Builder()
  15                 self.builder.set_translation_domain('zero-install')
  16                 self.builder.add_from_file(builderfile)
  17                 self.builderfile = builderfile
  18                 self.root = root
  19
  20         def get_widget(self, name = None):
  21                 """Look up a widget by name."""
  22                 if not name:
  23                         name = self.root
  24                 widget = self.builder.get_object(name)
  25                 assert widget, "Widget '%s' not found in GtkBuilder file '%s'" % (name, self.builderfile)
  26                 return widget
  27
  28 def show_message_box(parent, message, type = gtk.MESSAGE_ERROR):
  29         """Display a non-modal message box with an OK button.
  30         @param parent: the parent window
  31         @param message: the message to be displayed
  32         @param type: the type of box (used for the icon)"""
  33         box = gtk.MessageDialog(parent, gtk.DIALOG_DESTROY_WITH_PARENT,
  34                                 type, gtk.BUTTONS_OK,
  35                                 str(message))
  36         box.set_position(gtk.WIN_POS_CENTER)
  37         def resp(b, r):
  38                 b.destroy()
  39         box.connect('response', resp)
  40         box.show()
  41
  42 _busy_pointer = None
  43 def get_busy_pointer():
  44         """Get a GDK background-activity cursor.
  45         Use this when something is happening, but the GUI is still responsive.
  46         @return: the busy cursor (a singleton)
  47         @rtype: gdk.Cursor
  48         """
  49         global _busy_pointer
  50         if _busy_pointer is not None:
  51                 return _busy_pointer
  52
  53         # This is crazy. We build a cursor that looks like the old
  54         # Netscape busy-with-a-pointer cursor and set that, then the
  55         # X server replaces it with a decent-looking one!!
  56         # See http://mail.gnome.org/archives/gtk-list/2007-May/msg00100.html
  57
  58         bit_data = "\
  59 \x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\
  60 \x0c\x00\x00\x00\x1c\x00\x00\x00\x3c\x00\x00\x00\
  61 \x7c\x00\x00\x00\xfc\x00\x00\x00\xfc\x01\x00\x00\
  62 \xfc\x3b\x00\x00\x7c\x38\x00\x00\x6c\x54\x00\x00\
  63 \xc4\xdc\x00\x00\xc0\x44\x00\x00\x80\x39\x00\x00\
  64 \x80\x39\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
  65 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
  66 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
  67 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
  68 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
  69 \x00\x00\x00\x00\x00\x00\x00\x00"
  70
  71         try:
  72                 pix = gtk.gdk.bitmap_create_from_data(None, bit_data, 32, 32)
  73                 color = gtk.gdk.Color()
  74                 _busy_pointer = gtk.gdk.Cursor(pix, pix, color, color, 2, 2)
  75         except:
  76                 #old bug http://bugzilla.gnome.org/show_bug.cgi?id=103616
  77                 _busy_pointer = gtk.gdk.Cursor(gtk.gdk.WATCH)
  78         return _busy_pointer