[gnome-color-manager] trivial: add some sample code for the future printing functionality

[Richard Hughes <rhughes src gnome org>]

commit 0e51eec385d545aeb7c692abaa0814d24b9dc192
Author: Richard Hughes <richard hughsie com>
Date:   Thu Feb 18 16:31:31 2010 +0000

    trivial: add some sample code for the future printing functionality

 src/Makefile.am |    2 +
 src/gcm-print.c |  258 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/gcm-print.h |   69 +++++++++++++++
 3 files changed, 329 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index a52695b..7aa9cf0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -32,6 +32,8 @@ libgcmshared_a_SOURCES =				\
 	gcm-screen.h					\
 	gcm-xyz.c					\
 	gcm-xyz.h					\
+	gcm-print.c					\
+	gcm-print.h					\
 	gcm-utils.c					\
 	gcm-utils.h					\
 	gcm-enum.c					\
diff --git a/src/gcm-print.c b/src/gcm-print.c
new file mode 100644
index 0000000..72c58fb
--- /dev/null
+++ b/src/gcm-print.c
@@ -0,0 +1,258 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010 Richard Hughes <richard hughsie com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/**
+ * SECTION:gcm-print
+ * @short_description: Print device abstraction
+ *
+ * This object allows the programmer to detect a color sensor device.
+ */
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include "gcm-print.h"
+
+#include "egg-debug.h"
+
+static void     gcm_print_finalize	(GObject     *object);
+
+#define GCM_PRINT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GCM_TYPE_PRINT, GcmPrintPrivate))
+
+/**
+ * GcmPrintPrivate:
+ *
+ * Private #GcmPrint data
+ **/
+struct _GcmPrintPrivate
+{
+	gboolean			 present;
+	gchar				*vendor;
+	GtkPrintSettings		*settings;
+};
+
+enum {
+	PROP_0,
+	PROP_PRESENT,
+	PROP_VENDOR,
+	PROP_LAST
+};
+
+G_DEFINE_TYPE (GcmPrint, gcm_print, G_TYPE_OBJECT)
+
+/**
+ * gcm_print_get_property:
+ **/
+static void
+gcm_print_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+	GcmPrint *print = GCM_PRINT (object);
+	GcmPrintPrivate *priv = print->priv;
+
+	switch (prop_id) {
+	case PROP_PRESENT:
+		g_value_set_boolean (value, priv->present);
+		break;
+	case PROP_VENDOR:
+		g_value_set_string (value, priv->vendor);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+/**
+ * gcm_print_set_property:
+ **/
+static void
+gcm_print_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+	switch (prop_id) {
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+/**
+ * gcm_print_class_init:
+ **/
+static void
+gcm_print_class_init (GcmPrintClass *klass)
+{
+	GParamSpec *pspec;
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = gcm_print_finalize;
+	object_class->get_property = gcm_print_get_property;
+	object_class->set_property = gcm_print_set_property;
+
+	/**
+	 * GcmPrint:present:
+	 */
+	pspec = g_param_spec_boolean ("present", NULL, NULL,
+				      FALSE,
+				      G_PARAM_READABLE);
+	g_object_class_install_property (object_class, PROP_PRESENT, pspec);
+
+	/**
+	 * GcmPrint:vendor:
+	 */
+	pspec = g_param_spec_string ("vendor", NULL, NULL,
+				     NULL,
+				     G_PARAM_READABLE);
+	g_object_class_install_property (object_class, PROP_VENDOR, pspec);
+
+	g_type_class_add_private (klass, sizeof (GcmPrintPrivate));
+}
+
+/**
+ * gcm_print_begin_print_cb:
+ *
+ * Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts.
+ * A typical use for ::begin-print is to use the parameters from the GtkPrintContext and paginate the document accordingly,
+ * and then set the number of pages with gtk_print_operation_set_n_pages().
+ **/
+static void
+gcm_print_begin_print_cb (GtkPrintOperation *operation, GtkPrintContext *context, GcmPrint *print)
+{
+	gtk_print_operation_set_n_pages (operation, 5);
+}
+
+/**
+ * gcm_print_draw_page_cb:
+ *
+ * Emitted for every page that is printed. The signal handler must render the page onto the cairo context
+ **/
+static void
+gcm_print_draw_page_cb (GtkPrintOperation *operation, GtkPrintContext *context, gint page_nr, GcmPrint *print)
+{
+	cairo_t *cr;
+	gdouble width = 0.0f;
+	gdouble height = 0.0f;
+	gint stride = 0;
+	cairo_surface_t *surface;
+	unsigned char *data = NULL;
+
+	gtk_print_operation_set_use_full_page (operation, TRUE);
+	width = gtk_print_context_get_width (context);
+	height = gtk_print_context_get_height (context);
+	cr = gtk_print_context_get_cairo_context (context);
+
+//	gdk_cairo_set_source_pixbuf (cr, const GdkPixbuf *pixbuf, 0, 0);
+
+	//stride = cairo_format_stride_for_width (format, width);
+	//data = malloc (stride * height);
+
+	surface = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_RGB24, width, height, stride);
+
+	cairo_set_source_surface (cr, surface, 0, 0);
+
+	cairo_surface_destroy (surface);
+
+}
+
+/**
+ * gcm_print_images:
+ **/
+gboolean
+gcm_print_images (GcmPrint *print, GtkWindow *window, GPtrArray *filenames, GError **error)
+{
+	GtkPrintOperation *operation;
+	GtkPrintOperationResult res;
+	GcmPrintPrivate *priv = print->priv;
+	gboolean ret = TRUE;
+
+	/* set some common settings */
+	gtk_print_settings_set_n_copies (priv->settings, 1);
+	gtk_print_settings_set_number_up (priv->settings, 1);
+	gtk_print_settings_set_orientation (priv->settings, GTK_PAGE_ORIENTATION_PORTRAIT);
+	gtk_print_settings_set_quality (priv->settings, GTK_PRINT_QUALITY_HIGH);
+	gtk_print_settings_set_use_color (priv->settings, TRUE);
+
+	/* create new instance */
+	operation = gtk_print_operation_new ();
+	gtk_print_operation_set_print_settings (operation, priv->settings);
+	g_signal_connect (operation, "begin-print", G_CALLBACK (gcm_print_begin_print_cb), print);
+	g_signal_connect (operation, "draw-page", G_CALLBACK (gcm_print_draw_page_cb), print);
+
+	/* do the print UI */
+	res = gtk_print_operation_run (operation,
+				       GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
+				       window, error);
+
+	/* all okay, so save future settings */
+	if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
+		g_object_unref (priv->settings);
+		priv->settings = g_object_ref (gtk_print_operation_get_print_settings (operation));
+	}
+
+	/* rely on error being set */
+	if (res == GTK_PRINT_OPERATION_RESULT_ERROR) {
+		ret = FALSE;
+		goto out;
+	}
+out:
+	g_object_unref (operation);
+	return TRUE;
+}
+
+/**
+ * gcm_print_init:
+ **/
+static void
+gcm_print_init (GcmPrint *print)
+{
+	print->priv = GCM_PRINT_GET_PRIVATE (print);
+	print->priv->vendor = NULL;
+	print->priv->settings = gtk_print_settings_new ();
+}
+
+/**
+ * gcm_print_finalize:
+ **/
+static void
+gcm_print_finalize (GObject *object)
+{
+	GcmPrint *print = GCM_PRINT (object);
+	GcmPrintPrivate *priv = print->priv;
+
+	g_free (priv->vendor);
+	g_object_unref (print->priv->settings);
+
+	G_OBJECT_CLASS (gcm_print_parent_class)->finalize (object);
+}
+
+/**
+ * gcm_print_new:
+ *
+ * Return value: a new GcmPrint object.
+ **/
+GcmPrint *
+gcm_print_new (void)
+{
+	GcmPrint *print;
+	print = g_object_new (GCM_TYPE_PRINT, NULL);
+	return GCM_PRINT (print);
+}
+
diff --git a/src/gcm-print.h b/src/gcm-print.h
new file mode 100644
index 0000000..8a11916
--- /dev/null
+++ b/src/gcm-print.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010 Richard Hughes <richard hughsie com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __GCM_PRINT_H
+#define __GCM_PRINT_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GCM_TYPE_PRINT		(gcm_print_get_type ())
+#define GCM_PRINT(o)		(G_TYPE_CHECK_INSTANCE_CAST ((o), GCM_TYPE_PRINT, GcmPrint))
+#define GCM_PRINT_CLASS(k)	(G_TYPE_CHECK_CLASS_CAST((k), GCM_TYPE_PRINT, GcmPrintClass))
+#define GCM_IS_PRINT(o)		(G_TYPE_CHECK_INSTANCE_TYPE ((o), GCM_TYPE_PRINT))
+#define GCM_IS_PRINT_CLASS(k)	(G_TYPE_CHECK_CLASS_TYPE ((k), GCM_TYPE_PRINT))
+#define GCM_PRINT_GET_CLASS(o)	(G_TYPE_INSTANCE_GET_CLASS ((o), GCM_TYPE_PRINT, GcmPrintClass))
+
+typedef struct _GcmPrintPrivate	GcmPrintPrivate;
+typedef struct _GcmPrint	GcmPrint;
+typedef struct _GcmPrintClass	GcmPrintClass;
+
+struct _GcmPrint
+{
+	 GObject			 parent;
+	 GcmPrintPrivate		*priv;
+};
+
+struct _GcmPrintClass
+{
+	GObjectClass	parent_class;
+	void		(* changed)			(void);
+	/* padding for future expansion */
+	void (*_gcm_reserved1) (void);
+	void (*_gcm_reserved2) (void);
+	void (*_gcm_reserved3) (void);
+	void (*_gcm_reserved4) (void);
+	void (*_gcm_reserved5) (void);
+};
+
+GType			 gcm_print_get_type		(void);
+GcmPrint		*gcm_print_new			(void);
+
+gboolean		 gcm_print_images		(GcmPrint	*print,
+							 GtkWindow	*window,
+							 GPtrArray	*filenames,
+							 GError		**error);
+
+G_END_DECLS
+
+#endif /* __GCM_PRINT_H */
+