Initial version

src/gwr-window.c

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+/* gwr-window.c
+ *
+ * Copyright 2018 Gergely Polonkai
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gwr-config.h"
+#include "gwr-window.h"
+
+struct _GwrWindow
+{
+  GtkApplicationWindow  parent_instance;
+
+  /* Template widgets */
+  GtkHeaderBar        *header_bar;
+  GtkLabel            *label;
+};
+
+G_DEFINE_TYPE (GwrWindow, gwr_window, GTK_TYPE_APPLICATION_WINDOW)
+
+static void
+gwr_window_class_init (GwrWindowClass *klass)
+{
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  gtk_widget_class_set_template_from_resource (widget_class, "/eu/polonkai/gergely/GnomeWaterReminder/gwr-window.ui");
+  gtk_widget_class_bind_template_child (widget_class, GwrWindow, header_bar);
+  gtk_widget_class_bind_template_child (widget_class, GwrWindow, label);
+}
+
+static void
+gwr_window_init (GwrWindow *self)
+{
+  gtk_widget_init_template (GTK_WIDGET (self));
+}

src/gwr-window.h

@@ -0,0 +1,29 @@
+/* gwr-window.h
+ *
+ * Copyright 2018 Gergely Polonkai
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GWR_TYPE_WINDOW (gwr_window_get_type())
+
+G_DECLARE_FINAL_TYPE (GwrWindow, gwr_window, GWR, WINDOW, GtkApplicationWindow)
+
+G_END_DECLS

src/main.c

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+/* main.c
+ *
+ * Copyright 2018 Gergely Polonkai
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib/gi18n.h>
+
+#include "gwr-config.h"
+#include "gwr-window.h"
+
+static void
+on_activate (GtkApplication *app)
+{
+	GtkWindow *window;
+
+	/* It's good practice to check your parameters at the beginning of the
+	 * function. It helps catch errors early and in development instead of
+	 * by your users.
+	 */
+	g_assert (GTK_IS_APPLICATION (app));
+
+	/* Get the current window or create one if necessary. */
+	window = gtk_application_get_active_window (app);
+	if (window == NULL)
+		window = g_object_new (GWR_TYPE_WINDOW,
+		                       "application", app,
+		                       "default-width", 600,
+		                       "default-height", 300,
+		                       NULL);
+
+	/* Ask the window manager/compositor to present the window. */
+	gtk_window_present (window);
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+	g_autoptr(GtkApplication) app = NULL;
+	int ret;
+
+	/* Set up gettext translations */
+	bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+	textdomain (GETTEXT_PACKAGE);
+
+	/*
+	 * Create a new GtkApplication. The application manages our main loop,
+	 * application windows, integration with the window manager/compositor, and
+	 * desktop features such as file opening and single-instance applications.
+	 */
+	app = gtk_application_new ("eu.polonkai.gergely.GnomeWaterReminder", G_APPLICATION_FLAGS_NONE);
+
+	/*
+	 * We connect to the activate signal to create a window when the application
+	 * has been lauched. Additionally, this signal notifies us when the user
+	 * tries to launch a "second instance" of the application. When they try
+	 * to do that, we'll just present any existing window.
+	 *
+	 * Because we can't pass a pointer to any function type, we have to cast
+	 * our "on_activate" function to a GCallback.
+	 */
+	g_signal_connect (app, "activate", G_CALLBACK (on_activate), NULL);
+
+	/*
+	 * Run the application. This function will block until the applicaiton
+	 * exits. Upon return, we have our exit code to return to the shell. (This
+	 * is the code you see when you do `echo $?` after running a command in a
+	 * terminal.
+	 *
+	 * Since GtkApplication inherits from GApplication, we use the parent class
+	 * method "run". But we need to cast, which is what the "G_APPLICATION()"
+	 * macro does.
+	 */
+	ret = g_application_run (G_APPLICATION (app), argc, argv);
+
+	return ret;
+}

src/meson.build

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+gwr_sources = [
+  gwr_resources,
+  'main.c',
+  'gwr-window.c',
+]
+
+gwr_deps = [
+  dependency('gio-2.0', version: '>= 2.50'),
+  dependency('gtk+-3.0', version: '>= 3.22'),
+]
+
+executable('gnome-water-reminder', gwr_sources,
+  dependencies: gwr_deps,
+  install: true,
+)