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# Copyright (c) 2016 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
=begin
= Assistant
Demonstrates a sample multi-step assistant. Assistants are used to divide
an operation into several simpler sequential steps, and to guide the user
through these steps.
=end
class AssistantDemo
def initialize(main_window)
@assistant = Gtk::Assistant.new
@assistant.screen = main_window.screen
create_page1
create_page2
create_page3
progress_bar = create_page4
@assistant.signal_connect("cancel", &:destroy)
@assistant.signal_connect("close", &:destroy)
@assistant.signal_connect "apply" do |widget|
GLib::Timeout.add(100) do
fraction = progress_bar.fraction + 0.05
if fraction < 1.0
progress_bar.fraction = fraction
else
widget.destroy
GLib::Source::REMOVE
end
end
end
@assistant.signal_connect "prepare" do |widget, _page|
current_page = widget.current_page
n_pages = widget.n_pages
widget.title = "Sample assistant (#{current_page + 1} of #{n_pages}"
widget.commit if current_page == 3
end
end
def run
if !@assistant.visible?
@assistant.show_all
else
@assistant.destroy
end
@assistant
end
private
def create_page1
box = Gtk::Box.new(:horizontal, 12)
box.border_width = 12
label = Gtk::Label.new("You must fill out this entry to continue")
box.pack_start(label, :expand => true, :fill => true, :padding => 0)
entry = Gtk::Entry.new
entry.activates_default = true
entry.valign = :center
box.pack_start(entry, :expand => true, :fill => true, :padding => 0)
entry.signal_connect "changed" do |widget|
page_number = @assistant.current_page
current_page = @assistant.get_nth_page(page_number)
if widget.text
@assistant.set_page_complete(current_page, true)
else
@assistant.set_page_complete(current_page, false)
end
end
box.show_all
@assistant.append_page(box)
@assistant.set_page_title(box, "Page 1")
@assistant.set_page_type(box, :intro)
end
def create_page2
box = Gtk::Box.new(:horizontal, 12)
box.border_width = 12
checkbutton = Gtk::CheckButton.new(<<-LABEL)
This is optional data, you may continue
even if you do not check this
LABEL
box.pack_start(checkbutton, :expand => false, :fill => false, :padding => 0)
box.show_all
@assistant.append_page(box)
@assistant.set_page_complete(box, true)
@assistant.set_page_title(box, "Page 1")
end
def create_page3
message = "This is a confirmation page, press 'Apply' to apply changes"
label = Gtk::Label.new(message)
label.show
@assistant.append_page(label)
@assistant.set_page_type(label, :confirm)
@assistant.set_page_complete(label, true)
@assistant.set_page_title(label, "Confirmation")
end
def create_page4
progress_bar = Gtk::ProgressBar.new
progress_bar.halign = :center
progress_bar.valign = :center
progress_bar.show
@assistant.append_page(progress_bar)
@assistant.set_page_type(progress_bar, :progress)
@assistant.set_page_title(progress_bar, "Applying changes")
# This prevents the assistant window from being
# closed while we're "busy" applying changes.
@assistant.set_page_complete(progress_bar, false)
progress_bar
end
end
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