1 files changed, 253 insertions, 0 deletions
diff --git a/e-util/e-spinner.c b/e-util/e-spinner.c
new file mode 100644
index 0000000000..cb4303c467
--- /dev/null
+++ b/e-util/e-spinner.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2014 Red Hat, Inc. (www.redhat.com)
+ *
+ * This program 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.
+ *
+ * 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 Lesser General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Milan Crha <mcrha@redhat.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gtk/gtk.h>
+
+#include "e-spinner.h"
+
+#define MAIN_IMAGE_FILENAME	"working.png"
+#define FRAME_SIZE		22
+#define FRAME_TIMEOUT_MS	100
+
+struct _ESpinnerPrivate
+{
+	GSList *pixbufs;
+	GSList *current_frame; /* link of 'pixbufs' */
+	gboolean active;
+	guint timeout_id;
+};
+
+enum {
+	PROP_0,
+	PROP_ACTIVE
+};
+
+G_DEFINE_TYPE (ESpinner, e_spinner, GTK_TYPE_IMAGE)
+
+static gboolean
+e_spinner_update_frame_cb (gpointer user_data)
+{
+	ESpinner *spinner = user_data;
+
+	g_return_val_if_fail (E_IS_SPINNER (spinner), FALSE);
+
+	if (spinner->priv->current_frame)
+		spinner->priv->current_frame = spinner->priv->current_frame->next;
+	if (!spinner->priv->current_frame)
+		spinner->priv->current_frame = spinner->priv->pixbufs;
+
+	if (!spinner->priv->current_frame) {
+		g_warn_if_reached ();
+		return FALSE;
+	}
+
+	gtk_image_set_from_pixbuf (GTK_IMAGE (spinner), spinner->priv->current_frame->data);
+
+	return TRUE;
+}
+
+static void
+e_spinner_set_property (GObject *object,
+			guint property_id,
+			const GValue *value,
+			GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACTIVE:
+			e_spinner_set_active (
+				E_SPINNER (object),
+				g_value_get_boolean (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+e_spinner_get_property (GObject *object,
+			guint property_id,
+			GValue *value,
+			GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_ACTIVE:
+			g_value_set_boolean (
+				value,
+				e_spinner_get_active (E_SPINNER (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+e_spinner_constructed (GObject *object)
+{
+	ESpinner *spinner;
+	GdkPixbuf *main_pixbuf;
+	gint xx, yy, width, height;
+	GError *error = NULL;
+
+	/* Chain up to parent's method. */
+	G_OBJECT_CLASS (e_spinner_parent_class)->constructed (object);
+
+	spinner = E_SPINNER (object);
+
+	main_pixbuf = gdk_pixbuf_new_from_file (EVOLUTION_IMAGESDIR G_DIR_SEPARATOR_S MAIN_IMAGE_FILENAME, &error);
+	if (!main_pixbuf) {
+		g_warning ("%s: Failed to load image: %s", error ? error->message : "Unknown error", G_STRFUNC);
+		g_clear_error (&error);
+		return;
+	}
+
+	width = gdk_pixbuf_get_width (main_pixbuf);
+	height = gdk_pixbuf_get_height (main_pixbuf);
+
+	for (yy = 0; yy < height; yy += FRAME_SIZE) {
+		for (xx = 0; xx < width; xx+= FRAME_SIZE) {
+			GdkPixbuf *frame;
+
+			frame = gdk_pixbuf_new_subpixbuf (main_pixbuf, xx, yy, FRAME_SIZE, FRAME_SIZE);
+			if (frame)
+				spinner->priv->pixbufs = g_slist_prepend (spinner->priv->pixbufs, frame);
+		}
+	}
+
+	g_object_unref (main_pixbuf);
+
+	spinner->priv->pixbufs = g_slist_reverse (spinner->priv->pixbufs);
+
+	spinner->priv->current_frame = spinner->priv->pixbufs;
+	if (spinner->priv->pixbufs)
+		gtk_image_set_from_pixbuf (GTK_IMAGE (spinner), spinner->priv->pixbufs->data);
+}
+
+static void
+e_spinner_dispose (GObject *object)
+{
+	/* This resets the timeout_id too */
+	e_spinner_set_active (E_SPINNER (object), FALSE);
+
+	/* Chain up to parent's method. */
+	G_OBJECT_CLASS (e_spinner_parent_class)->dispose (object);
+}
+
+static void
+e_spinner_finalize (GObject *object)
+{
+	ESpinner *spinner = E_SPINNER (object);
+
+	g_slist_free_full (spinner->priv->pixbufs, g_object_unref);
+	spinner->priv->pixbufs = NULL;
+	spinner->priv->current_frame = NULL;
+
+	g_warn_if_fail (spinner->priv->timeout_id == 0);
+
+	/* Chain up to parent's method. */
+	G_OBJECT_CLASS (e_spinner_parent_class)->finalize (object);
+}
+
+static void
+e_spinner_class_init (ESpinnerClass *klass)
+{
+	GObjectClass *object_class;
+
+	g_type_class_add_private (klass, sizeof (ESpinnerPrivate));
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->set_property = e_spinner_set_property;
+	object_class->get_property = e_spinner_get_property;
+	object_class->dispose = e_spinner_dispose;
+	object_class->finalize = e_spinner_finalize;
+	object_class->constructed = e_spinner_constructed;
+
+	/**
+	 * ESpinner:active:
+	 *
+	 * Whether the animation is active.
+	 **/
+	g_object_class_install_property (
+		object_class,
+		PROP_ACTIVE,
+		g_param_spec_boolean (
+			"active",
+			"Active",
+			"Whether the animation is active",
+			FALSE,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT |
+			G_PARAM_STATIC_STRINGS));
+}
+
+static void
+e_spinner_init (ESpinner *spinner)
+{
+	spinner->priv = G_TYPE_INSTANCE_GET_PRIVATE (spinner, E_TYPE_SPINNER, ESpinnerPrivate);
+}
+
+GtkWidget *
+e_spinner_new (void)
+{
+	return g_object_new (E_TYPE_SPINNER, NULL);
+}
+
+gboolean
+e_spinner_get_active (ESpinner *spinner)
+{
+	g_return_val_if_fail (E_IS_SPINNER (spinner), FALSE);
+
+	return spinner->priv->active;
+}
+
+void
+e_spinner_set_active (ESpinner *spinner,
+		      gboolean active)
+{
+	g_return_if_fail (E_IS_SPINNER (spinner));
+
+	if ((spinner->priv->active ? 1 : 0) == (active ? 1 : 0))
+		return;
+
+	spinner->priv->active = active;
+
+	if (spinner->priv->timeout_id) {
+		g_source_remove (spinner->priv->timeout_id);
+		spinner->priv->timeout_id = 0;
+	}
+
+	if (spinner->priv->active && spinner->priv->pixbufs)
+		spinner->priv->timeout_id = g_timeout_add_full (G_PRIORITY_LOW, FRAME_TIMEOUT_MS, e_spinner_update_frame_cb, spinner, NULL);
+
+	g_object_notify (G_OBJECT (spinner), "active");
+}
+
+void
+e_spinner_start (ESpinner *spinner)
+{
+	e_spinner_set_active (spinner, TRUE);
+}
+
+void
+e_spinner_stop (ESpinner *spinner)
+{
+	e_spinner_set_active (spinner, FALSE);
+}