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#!/usr/bin/env ruby
#
# Copyright (C) 2023 Ruby-GNOME Project Team
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Example from:
# * https://gitlab.gnome.org/GNOME/gtk/-/blob/main/examples/application5/exampleapp.c
# * https://gitlab.gnome.org/GNOME/gtk/-/blob/main/examples/application5/exampleappwin.c
# * https://gitlab.gnome.org/GNOME/gtk/-/blob/main/examples/application5/window.ui
# * https://gitlab.gnome.org/GNOME/gtk/-/blob/main/examples/application5/gears-menu.ui
# License: LGPL2.1-or-later
# GSETTINGS_SCHEMA_DIR must be set before requiring "gtk4" gem because it is used in the GIO initialization.
if File.exist?(File.join(__dir__, "gschemas.compiled"))
ENV["GSETTINGS_SCHEMA_DIR"] = __dir__
else
raise %{gschemas.compiled doesn't exist. Run "rake" to generate it.}
end
require "gtk4"
class ExampleAppWindow < Gtk::ApplicationWindow
type_register
class << self
def init
template = <<~TEMPLATE
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<template class="ExampleAppWindow" parent="GtkApplicationWindow">
<property name="title" translatable="yes">Example Application</property>
<property name="default-width">600</property>
<property name="default-height">400</property>
<child type="titlebar">
<object class="GtkHeaderBar" id="header">
<child type="title">
<object class="GtkStackSwitcher" id="tabs">
<property name="stack">stack</property>
</object>
</child>
<child type="end">
<object class="GtkMenuButton" id="gears">
<property name="direction">none</property>
</object>
</child>
</object>
</child>
<child>
<object class="GtkBox" id="content_box">
<property name="orientation">vertical</property>
<child>
<object class="GtkStack" id="stack"/>
</child>
</object>
</child>
</template>
</interface>
TEMPLATE
set_template(data: template)
bind_template_child("stack")
bind_template_child("gears")
end
end
def initialize(application)
menu_ui = <<~MENU
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<menu id="menu">
<section>
<item>
<attribute name="label" translatable="yes">_Preferences</attribute>
<attribute name="action">app.preferences</attribute>
</item>
</section>
<section>
<item>
<attribute name="label" translatable="yes">_Quit</attribute>
<attribute name="action">app.quit</attribute>
</item>
</section>
</menu>
</interface>
MENU
super(application: application)
builder = Gtk::Builder.new(string: menu_ui)
gears.menu_model = builder["menu"]
@settings = Gio::Settings.new("org.gtk.exampleapp")
@settings.bind("transition", stack, "transition-type", :default)
end
def open(file)
basename = file.basename
scrolled = Gtk::ScrolledWindow.new
scrolled.hexpand = true
scrolled.vexpand = true
view = Gtk::TextView.new
view.editable = false
view.cursor_visible = false
scrolled.child = view
stack.add_titled(scrolled, basename, basename)
buffer = view.buffer
file.read do |stream|
buffer.text = stream.read.force_encoding(Encoding::UTF_8)
end
tag = buffer.create_tag
@settings.bind("font", tag, "font", :default)
buffer.apply_tag(tag, buffer.start_iter, buffer.end_iter)
end
end
class ExampleApp < Gtk::Application
def initialize
super("org.gtk.exampleapp", :handles_open)
signal_connect "startup" do |application|
[
"preferences",
"quit"
].each do |action_name|
action = Gio::SimpleAction.new(action_name)
action.signal_connect("activate") do |_action, _parameter|
__send__("#{action_name}_activated")
end
application.add_action(action)
end
application.set_accels_for_action("app.quit", ["<Control>Q"])
end
signal_connect "activate" do |application|
window = ExampleAppWindow.new(application)
window.present
end
signal_connect "open" do |application, files, hint|
window = application.windows[0] || ExampleAppWindow.new(application)
files.each do |file|
window.open(file)
end
window.present
end
end
private
def preferences_activated
end
def quit_activated
quit
end
end
app = ExampleApp.new
# Gtk::Application#run needs C style argv ([prog, arg1, arg2, ...,argn]).
# The ARGV ruby variable only contains the arguments ([arg1, arg2, ...,argb])
# and not the program name. We have to add it explicitly.
app.run([$PROGRAM_NAME] + ARGV)
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