A custom progress dialog should not be hard to implement. If you pop it
up as a modal dialog, you'll also avoid having to desentivize the window
by hand. You'll definitely need a separate thread for a progress dialog,
and possibly wrap whatever you're doing that requires waiting in some
sort of ProgressingTask object to get things completely done.
That said, I do have a weird hunch I saw some existing implementations
of the problem around, but can't for the heck of it figure out in what
context. Brief googling would indicate that indeed Gtk has a "progress
bar" widget, the documentation to that might provide some insights as to
what you're looking at. And embedding one in a pop-up modal progress
dialog should then be trivial.
Bleh, meant to send this to ruby-gnome2, not ruby-talk. :-(
Anyway, here's how I solved it. If there's a cleaner way to do it,
I'd love to hear about it.
class App
def initialize
Gtk::init
@window =3D Gtk::Window.new "Joe's Crazy Application"
@window.set_default_size 300, 300
vbox =3D Gtk::VBox.new
@window << vbox
vbox << Gtk::Label.new("Stuff")
vbox << Gtk::Label.new("More Stuff")
vbox << Gtk::Button.new("Useless button")
vbox << Gtk::Button.new("Another Useless button")
lock_button =3D Gtk::Button.new "Lock window for three seconds"
vbox << lock_button
lock_button.signal_connect("clicked") do
# Window gets locked while doing stuff
@window.lock do
start_time =3D Time.now
# computationally heavy thing there
loop do
Gtk:
rocess_gui_events # Any way I can get rid of this?
rand 100000000
break if Time.now - start_time >=3D 3
end
end
end
@window.signal_connect("delete-event") { Gtk::main_quit }
@window.show_all
Gtk::main
end
end
module Gtk
# Makes sure that Gtk has a change to draw stuff
def self.process_gui_events
while Gtk::events_pending?
Gtk::main_iteration
end
end
end
class Gtk::Window
# Locks the window
def lock reason =3D "hold on there buddy", &block
self.sensitive =3D false
display_locking_dialog(reason) do
block.call
end
self.sensitive =3D true
end
# Displays a locking dialog box with a
# pulsing progress bar over the window
def display_locking_dialog reason, &block
dialog =3D Gtk:
ialog.new "", self, Gtk:
ialog::MODAL
dialog.decorated =3D false
vbox =3D Gtk::VBox.new
reason_label =3D Gtk::Label.new reason
progress_bar =3D Gtk:
rogressBar.new
thread_id =3D Gtk::timeout_add(100) { progress_bar.pulse }
vbox << reason_label << progress_bar
dialog.action_area << vbox
dialog.show_all
block.call
Gtk::timeout_remove(thread_id)
dialog.destroy
end
end
App.new if __FILE__ =3D=3D $0