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# Copyright (c) 2015-2016 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
=begin
= Text View/Markup
Gtk::TextBuffer lets you define your own tags that can influence
text formatting in a variety of ways. In this example, we show
that Gtk::TextBuffer can load Pango markup and automatically generate
suitable tags.
=end
class MarkupDemo
def initialize(main_window)
@window = Gtk::Window.new(:toplevel)
@window.screen = main_window.screen
@window.title = "Markup"
@window.set_default_size(450, 450)
initialize_stack
initialize_show_source
initialize_headerbar
sw = generate_sourceview
@view = sw.child
@stack.add_named(sw, "formatted")
sw = generate_sourceview
@view2 = sw.child
@stack.add_named(sw, "source")
populate_sourceviews
end
def run
if !@window.visible?
@window.show_all
else
@window.destroy
end
end
private
def initialize_stack
@stack = Gtk::Stack.new
@stack.show
@window.add(@stack)
end
def initialize_headerbar
header = Gtk::HeaderBar.new
header.pack_start(@show_source)
header.show_close_button = true
header.show_all
@window.titlebar = header
end
def show_source_toggled_signal
@show_source.signal_connect "toggled" do |button|
if button.active?
@stack.visible_child_name = "source"
else
buffer = @view2.buffer
markup = buffer.get_text(buffer.start_iter, buffer.end_iter, false)
buffer = @view.buffer
buffer.insert_markup(buffer.start_iter, markup, -1)
@stack.visible_child_name = "formatted"
end
end
end
def initialize_show_source
@show_source = Gtk::CheckButton.new("Source")
@show_source.valign = :center
show_source_toggled_signal
end
def generate_sourceview
view = Gtk::TextView.new
view.wrap_mode = :word
view.left_margin = 10
view.right_margin = 10
sw = Gtk::ScrolledWindow.new(nil, nil)
sw.set_policy(:automatic, :automatic)
sw.add(view)
sw.show_all
sw
end
def populate_sourceviews
markup = Gio::Resources.lookup_data("/markup/markup.txt", 0)
buffer = @view.buffer
buffer.insert_markup(buffer.start_iter, markup, -1)
buffer = @view2.buffer
buffer.insert(buffer.start_iter, markup)
@stack.show
end
end
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