[network-manager-applet/btdun] bluetooth: actually add spinner sources

[Dan Williams <dcbw src gnome org>]

commit 8b0ae181efd1e3856851e6a44e16bd51d440d0ce
Author: Dan Williams <dcbw redhat com>
Date:   Sat Oct 3 01:06:57 2009 -0700

    bluetooth: actually add spinner sources

 src/gnome-bluetooth/bling-spinner.c |  307 +++++++++++++++++++++++++++++++++++
 src/gnome-bluetooth/bling-spinner.h |   58 +++++++
 2 files changed, 365 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-bluetooth/bling-spinner.c b/src/gnome-bluetooth/bling-spinner.c
new file mode 100644
index 0000000..7269188
--- /dev/null
+++ b/src/gnome-bluetooth/bling-spinner.c
@@ -0,0 +1,307 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/*
+ * @file libbling/bling-spinner.c A apple-esque spinner widger
+ *
+ * @Copyright (C) 2007 John Stowers, Neil Jagdish Patel.
+ *
+ * This library 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; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA  02111-1307, USA.
+ *
+ * Code adapted from egg-spinner
+ * by Christian Hergert <christian hergert gmail com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gtk/gtk.h>
+#include <math.h>
+
+#include "bling-spinner.h"
+
+#define BLING_SPINNER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), BLING_TYPE_SPINNER, BlingSpinnerPrivate))
+
+G_DEFINE_TYPE (BlingSpinner, bling_spinner, GTK_TYPE_DRAWING_AREA);
+
+enum
+{
+	PROP_0,
+	PROP_NUM_LINES
+};
+
+/* STRUCTS & ENUMS */
+struct _BlingSpinnerPrivate
+{
+	/* state */
+	guint current;
+	guint timeout;
+
+	/* appearance */
+	guint lines;
+};
+
+/* FORWARDS */
+static void bling_spinner_class_init(BlingSpinnerClass *klass);
+static void bling_spinner_init(BlingSpinner *spinner);
+static void bling_spinner_finalize (GObject *gobject);
+static void bling_spinner_set_property(GObject *gobject, guint prop_id, const GValue *value, GParamSpec *pspec);
+static gboolean bling_spinner_expose(GtkWidget *widget, GdkEventExpose *event);
+static void bling_spinner_screen_changed (GtkWidget* widget, GdkScreen* old_screen);
+
+static GtkDrawingAreaClass *parent_class;
+
+/* DRAWING FUNCTIONS */
+static void
+draw (GtkWidget *widget, cairo_t *cr)
+{
+	double x, y;
+	double radius;
+	double half;
+	int i;
+	int width, height;
+
+	BlingSpinnerPrivate *priv;
+
+	priv = BLING_SPINNER_GET_PRIVATE (widget);
+
+	cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+
+	width = widget->allocation.width;
+	height = widget->allocation.height;
+
+	if ( (width < 12) || (height <12) )
+		gtk_widget_set_size_request(widget, 12, 12);
+
+	//x = widget->allocation.x + widget->allocation.width / 2;
+	//y = widget->allocation.y + widget->allocation.height / 2;
+	x = widget->allocation.width / 2;
+	y = widget->allocation.height / 2;
+	radius = MIN (widget->allocation.width	/ 2,
+				  widget->allocation.height / 2);
+	half = priv->lines / 2;
+
+	/*FIXME: render in B&W for non transparency */
+
+	for (i = 0; i < priv->lines; i++) {
+		int inset = 0.7 * radius;
+		/* transparency is a function of time and intial value */
+		double t = (double) ((i + priv->lines - priv->current)
+				   % priv->lines) / priv->lines;
+
+		cairo_save (cr);
+
+		cairo_set_source_rgba (cr, 0, 0, 0, t);
+		//cairo_set_line_width (cr, 2 * cairo_get_line_width (cr));
+		cairo_set_line_width (cr, 2.0);
+		cairo_move_to (cr,
+					   x + (radius - inset) * cos (i * M_PI / half),
+					   y + (radius - inset) * sin (i * M_PI / half));
+		cairo_line_to (cr,
+					   x + radius * cos (i * M_PI / half),
+					   y + radius * sin (i * M_PI / half));
+		cairo_stroke (cr);
+
+		cairo_restore (cr);
+	}
+}
+
+
+/*	GOBJECT INIT CODE */
+static void
+bling_spinner_class_init(BlingSpinnerClass *klass)
+{
+	GObjectClass *gobject_class;
+	GtkWidgetClass *widget_class;
+
+	parent_class = g_type_class_peek_parent(klass);
+
+	gobject_class = G_OBJECT_CLASS(klass);
+	g_type_class_add_private (gobject_class, sizeof (BlingSpinnerPrivate));
+	gobject_class->set_property = bling_spinner_set_property;
+	gobject_class->finalize = bling_spinner_finalize;
+
+	widget_class = GTK_WIDGET_CLASS(klass);
+	widget_class->expose_event = bling_spinner_expose;
+	widget_class->screen_changed = bling_spinner_screen_changed;
+
+	g_object_class_install_property(gobject_class, PROP_NUM_LINES,
+		g_param_spec_uint("lines", "Num Lines",
+							"The number of lines to animate",
+							0,20,12,
+							G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE));
+
+}
+
+static void
+bling_spinner_init (BlingSpinner *spinner)
+{
+	BlingSpinnerPrivate *priv;
+
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+	priv->current = 0;
+	priv->timeout = 0;
+
+	GTK_WIDGET_SET_FLAGS (GTK_WIDGET (spinner), GTK_NO_WINDOW);
+}
+
+static gboolean
+bling_spinner_expose (GtkWidget *widget, GdkEventExpose *event)
+{
+	cairo_t *cr;
+
+	/* get cairo context */
+	cr = gdk_cairo_create (gtk_widget_get_window (widget));
+
+	/* set a clip region for the expose event */
+	cairo_rectangle (cr,
+					 event->area.x, event->area.y,
+					 event->area.width, event->area.height);
+	cairo_clip (cr);
+
+	cairo_translate (cr, event->area.x, event->area.y);
+
+	/* draw clip region */
+	draw (widget, cr);
+
+	/* free memory */
+	cairo_destroy (cr);
+
+	return FALSE;
+}
+
+static void
+bling_spinner_screen_changed (GtkWidget* widget, GdkScreen* old_screen)
+{
+	BlingSpinner *spinner;
+	GdkScreen* new_screen;
+	GdkColormap* colormap;
+
+	spinner = BLING_SPINNER(widget);
+
+	new_screen = gtk_widget_get_screen (widget);
+	colormap = gdk_screen_get_rgba_colormap (new_screen);
+
+	if (!colormap)
+		colormap = gdk_screen_get_rgb_colormap (new_screen);
+
+	gtk_widget_set_colormap (widget, colormap);
+}
+
+static gboolean
+bling_spinner_timeout (gpointer data)
+{
+	BlingSpinner *spinner;
+	BlingSpinnerPrivate *priv;
+
+	spinner = BLING_SPINNER (data);
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+
+	if (priv->current + 1 >= priv->lines) {
+		priv->current = 0;
+	} else {
+		priv->current++;
+	}
+
+	gtk_widget_queue_draw (GTK_WIDGET (data));
+
+	return TRUE;
+}
+
+static void
+bling_spinner_set_property(GObject *gobject, guint prop_id,
+					const GValue *value, GParamSpec *pspec)
+{
+	BlingSpinner *spinner;
+	BlingSpinnerPrivate *priv;
+
+	spinner = BLING_SPINNER(gobject);
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+
+	switch (prop_id)
+	{
+		case PROP_NUM_LINES:
+			priv->lines = g_value_get_uint(value);
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, prop_id, pspec);
+			break;
+	}
+}
+
+static void
+bling_spinner_finalize (GObject *gobject)
+{
+	BlingSpinner *spinner;
+	BlingSpinnerPrivate *priv;
+
+	spinner = BLING_SPINNER(gobject);
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+
+	if (priv->timeout != 0) {
+		g_source_remove (priv->timeout);
+		priv->timeout = 0;
+	}
+}
+
+/**
+ * bling_spinner_new
+ *
+ * Returns a default spinner. Not yet started.
+ *
+ * Returns: a new #BlingSpinner
+ */
+GtkWidget *
+bling_spinner_new (void)
+{
+	return g_object_new (BLING_TYPE_SPINNER, NULL);
+}
+
+/**
+ * bling_spinner_start
+ *
+ * Starts the animation
+ */
+void
+bling_spinner_start (BlingSpinner *spinner)
+{
+	BlingSpinnerPrivate *priv;
+
+	g_return_if_fail (BLING_IS_SPINNER (spinner));
+
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+	if (priv->timeout != 0)
+		return;
+	priv->timeout = g_timeout_add (80, bling_spinner_timeout, spinner);
+}
+
+/**
+ * bling_spinner_stop
+ *
+ * Stops the animation
+ */
+void
+bling_spinner_stop (BlingSpinner *spinner)
+{
+	BlingSpinnerPrivate *priv;
+
+	g_return_if_fail (BLING_IS_SPINNER (spinner));
+
+	priv = BLING_SPINNER_GET_PRIVATE (spinner);
+	if (priv->timeout == 0)
+		return;
+	g_source_remove (priv->timeout);
+	priv->timeout = 0;
+}
diff --git a/src/gnome-bluetooth/bling-spinner.h b/src/gnome-bluetooth/bling-spinner.h
new file mode 100644
index 0000000..8bc153c
--- /dev/null
+++ b/src/gnome-bluetooth/bling-spinner.h
@@ -0,0 +1,58 @@
+/* @Copyright (C) 2007 John Stowers, Neil Jagdish Patel.
+ *
+ * This library 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; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA  02111-1307, USA.
+ */
+
+
+#ifndef _BLING_SPINNER_H_
+#define _BLING_SPINNER_H_
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define BLING_TYPE_SPINNER           (bling_spinner_get_type ())
+#define BLING_SPINNER(obj)           (G_TYPE_CHECK_INSTANCE_CAST ((obj), BLING_TYPE_SPINNER, BlingSpinner))
+#define BLING_SPINNER_CLASS(obj)     (G_TYPE_CHECK_CLASS_CAST ((obj), BLING_SPINNER,  BlingSpinnerClass))
+#define BLING_IS_SPINNER(obj)        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), BLING_TYPE_SPINNER))
+#define BLING_IS_SPINNER_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE ((obj), BLING_TYPE_SPINNER))
+#define BLING_SPINNER_GET_CLASS      (G_TYPE_INSTANCE_GET_CLASS ((obj), BLING_TYPE_SPINNER, BlingSpinnerClass))
+
+typedef struct _BlingSpinner      BlingSpinner;
+typedef struct _BlingSpinnerClass BlingSpinnerClass;
+typedef struct _BlingSpinnerPrivate  BlingSpinnerPrivate;
+
+struct _BlingSpinner
+{
+	GtkDrawingArea parent;
+};
+
+struct _BlingSpinnerClass
+{
+	GtkDrawingAreaClass parent_class;
+	BlingSpinnerPrivate *priv;
+};
+
+GType bling_spinner_get_type (void);
+
+GtkWidget * bling_spinner_new (void);
+
+void bling_spinner_start (BlingSpinner *spinner);
+void bling_spinner_stop  (BlingSpinner *spinner);
+
+G_END_DECLS
+
+#endif