Add most of the first tutorial

Signed-off-by: David Boddie <david.boddie@puri.sm>

build-aux/meson/postinstall.py

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+#!/usr/bin/env python3
+
+from os import environ, path
+from subprocess import call
+
+prefix = environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+datadir = path.join(prefix, 'share')
+destdir = environ.get('DESTDIR', '')
+
+# Package managers set this so we don't need to run
+if not destdir:
+    print('Updating icon cache...')
+    call(['gtk-update-icon-cache', '-qtf', path.join(datadir, 'icons', 'hicolor')])

com.example.first_application.json

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+{
+    "app-id": "com.example.first_application",
+    "runtime": "org.gnome.Platform",
+    "runtime-version": "master",
+    "sdk": "org.gnome.Sdk",
+    "command": "your-first-application",
+    "finish-args": [
+        "--socket=wayland"
+    ],
+    "build-options": {
+        "env": {
+            "V": "1"
+        }
+    },
+    "cleanup": [
+        "/lib/pkgconfig",
+        "/man",
+        "/share/doc",
+        "/share/gtk-doc",
+        "/share/man",
+        "/share/pkgconfig"
+    ],
+    "modules": [
+        {
+            "name": "first-application",
+            "buildsystem": "meson",
+            "builddir": true,
+            "subdir": "First_Application",
+            "sources": [
+                {
+                    "branch": "master",
+                    "type": "git",
+                    "url": "https://source.puri.sm/david.boddie/tutorials.git"
+                }
+            ]
+        }
+    ]
+}

data/com.example.first_application.desktop

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+[Desktop Entry]
+Name=Your First Application
+Icon=com.example.first_application
+Exec=your-first-application
+Terminal=false
+Type=Application
+Categories=
+StartupNotify=false

data/com.example.first_application.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<svg xmlns="http://www.w3.org/2000/svg" height="64" version="1.1" width="64"
+     viewBox="0 0 100 100">
+
+  <rect x="0" y="0" width="100" height="100" stroke="none" fill="#8080c0" />
+  <rect x="0" y="60" width="100" height="40" stroke="none" fill="#80c080" />
+  <circle cx="70" cy="30" r="20" stroke="none" fill="#f0f080" />
+</svg>

data/meson.build

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+configure_file(
+  input: 'com.example.first_application.desktop',
+  output: 'com.example.first_application.desktop',
+  copy: true,
+  install: true,
+  install_dir: join_paths(get_option('datadir'), 'applications')
+)
+
+install_data('com.example.first_application.svg',
+  install_dir: join_paths(get_option('datadir'), 'icons', 'hicolor', 'scalable', 'apps'))

meson.build

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+project('first-application',
+  version: '0.1.0',
+  meson_version: '>= 0.40.0',
+)
+
+subdir('data')
+subdir('src')
+
+meson.add_install_script('build-aux/meson/postinstall.py')

src/main.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2018 Purism SPC
+# SPDX-License-Identifier: GPL-3.0+
+# Author: David Boddie <david.boddie@puri.sm>
+
+import sys
+import gi
+gi.require_version('Gtk', '3.0')
+from gi.repository import GLib, Gtk
+
+
+class Application(Gtk.Application):
+
+    def __init__(self):
+        super().__init__(application_id='com.example.first_application')
+        GLib.set_application_name('Your First Application')
+
+    def do_activate(self):
+        window = Gtk.ApplicationWindow(application=self)
+        window.set_icon_name('com.example.first_application')
+
+        label = Gtk.Label()
+        label.set_markup('<span font="40">Hello World!</span>')
+        window.add(label)
+        window.show_all()
+
+
+if __name__ == "__main__":
+
+    app = Application()
+    result = app.run(sys.argv)
+    sys.exit(result)

src/meson.build

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+configure_file(
+  input: 'main.py',
+  output: 'your-first-application',
+  copy: true,
+  install: true,
+  install_dir: get_option('bindir')
+)