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main.c

/* -*- Mode: c; c-basic-offset: 4 -*- 
 *
 * GOBject Introspection Tutorial 
 * 
 * Written in 2013 by Simon Kågedal Reimer <[email protected]>
 *
 * To the extent possible under law, the author have dedicated all
 * copyright and related and neighboring rights to this software to
 * the public domain worldwide. This software is distributed without
 * any warranty.
 *
 * CC0 Public Domain Dedication:
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

#include <glib.h>
#include <girepository.h>
#include "tut-greeter.h"

int main (int argc, char *argv[]) 
{
    TutGreeter *greeter;
    GOptionContext *ctx;
    GError *error = NULL;

    ctx = g_option_context_new (NULL);
    g_option_context_add_group (ctx, g_irepository_get_option_group ());

    if (!g_option_context_parse (ctx, &argc, &argv, &error)) {
	g_print ("greeter: %s\n", error->message);
	return 1;
    }

    greeter = tut_greeter_new ();
    tut_greeter_greet (greeter);

    return 0;
}

Makefile

#
# GOBject Introspection Tutorial 
# 
# Written in 2013 by Simon Kågedal Reimer <[email protected]>
#
# To the extent possible under law, the author have dedicated all
# copyright and related and neighboring rights to this software to
# the public domain worldwide. This software is distributed without
# any warranty.
#
# CC0 Public Domain Dedication:
# http://creativecommons.org/publicdomain/zero/1.0/

C_INCLUDES:=$(shell pkg-config --cflags gobject-introspection-1.0)
CFLAGS=$(C_INCLUDES) -g
LIBS:=$(shell pkg-config --libs gobject-introspection-1.0 gmodule-2.0)

OBJECTS=tut-greeter.o main.o
SOURCES=tut-greeter.c tut-greeter.h main.c

NAMESPACE=Tut
NSVERSION=0.1
GIR_FILE=$(NAMESPACE)-$(NSVERSION).gir
TYPELIB_FILE=$(NAMESPACE)-$(NSVERSION).typelib

all: greeter $(TYPELIB_FILE)

greeter: $(OBJECTS)	
	$(CC) -o $@ $(OBJECTS) $(LIBS)

$(TYPELIB_FILE): $(GIR_FILE)
	g-ir-compiler $(GIR_FILE) --output=$(TYPELIB_FILE)

$(GIR_FILE): tut-greeter.c tut-greeter.h
	g-ir-scanner tut-greeter.c tut-greeter.h --program=./greeter $(C_INCLUDES) --include=GObject-2.0 --namespace=$(NAMESPACE) --nsversion=$(NSVERSION) --output=$(GIR_FILE)

tut-greeter.o: tut-greeter.c tut-greeter.h
main.o: main.c tut-greeter.h

clean:
	rm *.o greeter $(TYPELIB_FILE) $(GIR_FILE)

tut-greeter.c

/* -*- Mode: c; c-basic-offset: 4 -*- 
 *
 * GOBject Introspection Tutorial 
 * 
 * Written in 2013 by Simon Kågedal Reimer <[email protected]>
 *
 * To the extent possible under law, the author have dedicated all
 * copyright and related and neighboring rights to this software to
 * the public domain worldwide. This software is distributed without
 * any warranty.
 *
 * CC0 Public Domain Dedication:
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

#include <stdio.h>
#include "tut-greeter.h"

/**
 * SECTION: tut-greeter
 * @short_description: A greeter.
 *
 * The #TutGreeter is a class to display friendly greetings.
 */

G_DEFINE_TYPE (TutGreeter, tut_greeter, G_TYPE_OBJECT)

#define TUT_GREETER_GET_PRIVATE(o)	\
    (G_TYPE_INSTANCE_GET_PRIVATE ((o), TUT_GREETER_TYPE, TutGreeterPrivate))

struct _TutGreeterPrivate {
    gchar *greetee;		/* The entity to greet */
};

enum
{
    PROP_0,

    PROP_GREETEE,

    N_PROPERTIES
};

static GParamSpec *obj_properties[N_PROPERTIES] = { NULL, };

static void
tut_greeter_init (TutGreeter *object)
{
    TutGreeterPrivate *priv = TUT_GREETER_GET_PRIVATE (object);

    priv->greetee = NULL;
}

static void
tut_greeter_finalize (GObject *object)
{
    TutGreeterPrivate *priv = TUT_GREETER_GET_PRIVATE (object);

    g_free (priv->greetee);
    G_OBJECT_CLASS (tut_greeter_parent_class)->finalize (object);
}

static void
tut_greeter_set_property (GObject      *object,
			  guint         property_id,
			  const GValue *value,
			  GParamSpec   *pspec)
{
    TutGreeterPrivate *priv = TUT_GREETER_GET_PRIVATE (object);

    switch (property_id) {
    case PROP_GREETEE:
	g_free (priv->greetee);
	priv->greetee = g_value_dup_string (value);
	break;

    default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	break;
    }
}

static void
tut_greeter_get_property (GObject    *object,
			  guint       property_id,
			  GValue     *value,
			  GParamSpec *pspec)
{
    TutGreeterPrivate *priv = TUT_GREETER_GET_PRIVATE (object);

    switch (property_id) {
    case PROP_GREETEE:
	g_value_set_string (value, priv->greetee);
	break;

    default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	break;
    }
}

static void
tut_greeter_class_init (TutGreeterClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->set_property = tut_greeter_set_property;
    object_class->get_property = tut_greeter_get_property;
    object_class->finalize = tut_greeter_finalize;

    /**
     * TutGreeter:greetee:
     *
     * The entity to greet.
     */
    obj_properties[PROP_GREETEE] = 
	g_param_spec_string ("greetee",
			     "Greetee",
			     "The entity to greet.",
			     "World",
			     G_PARAM_READWRITE |
			     G_PARAM_CONSTRUCT);

    g_object_class_install_properties (object_class,
				       N_PROPERTIES,
				       obj_properties);

    g_type_class_add_private (object_class, sizeof (TutGreeterPrivate));
}


/**
 * tut_greeter_new:
 *
 * Allocates a new #TutGreeter.
 *
 * Return value: a new #TutGreeter.
 */
TutGreeter*
tut_greeter_new ()
{
    TutGreeter *greeter;

    greeter = g_object_new (TUT_GREETER_TYPE, NULL);
    return greeter;
}

/**
 * tut_greeter_greet:
 * @greeter: a #TutGreeter
 *
 * Prints a friendly greeting.
 *
 * Return value: nothing.
 */
void
tut_greeter_greet (TutGreeter *greeter)
{
    TutGreeterPrivate *priv;
    g_return_if_fail (greeter != NULL);

    priv = TUT_GREETER_GET_PRIVATE (greeter);

    printf ("Hello, %s!\n", priv->greetee);
}

tut-greeter.h

/* -*- Mode: c; c-basic-offset: 4 -*- 
 *
 * GOBject Introspection Tutorial 
 * 
 * Written in 2013 by Simon Kågedal Reimer <[email protected]>
 *
 * To the extent possible under law, the author have dedicated all
 * copyright and related and neighboring rights to this software to
 * the public domain worldwide. This software is distributed without
 * any warranty.
 *
 * CC0 Public Domain Dedication:
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

#ifndef __TUT_GREETER_H__
#define __TUT_GREETER_H__

#include <glib.h>
#include <glib-object.h>

#define TUT_GREETER_TYPE		\
    (tut_greeter_get_type())
#define TUT_GREETER(o)			\
    (G_TYPE_CHECK_INSTANCE_CAST ((o), TUT_GREETER_TYPE, TutGreeter))
#define TUT_GREETER_CLASS(c)		\
    (G_TYPE_CHECK_CLASS_CAST ((c), TUT_GREETER_TYPE, TutGreeterClass))
#define TUT_IS_GREETER(o)		\
    (G_TYPE_CHECK_INSTANCE_TYPE ((o), TUT_GREETER_TYPE))
#define TUT_IS_GREETER_CLASS(c)		\
    (G_TYPE_CHECK_CLASS_TYPE ((c),  TUT_GREETER_TYPE))
#define TUT_GREETER_GET_CLASS(o)	\
    (G_TYPE_INSTANCE_GET_CLASS ((o), TUT_GREETER_TYPE, TutGreeterClass))

typedef struct _TutGreeter		TutGreeter;
typedef struct _TutGreeterPrivate	TutGreeterPrivate;
typedef struct _TutGreeterClass		TutGreeterClass;

struct _TutGreeter {
    GObject parent;
};

struct _TutGreeterClass {
    GObjectClass parent;
};

GType		tut_greeter_get_type	() G_GNUC_CONST;

TutGreeter*	tut_greeter_new		(void);

void		tut_greeter_greet	(TutGreeter *greeter);

#endif /* __TUT_GREETER_H__ */