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[gnome-disk-utility] Forgot to add gdu-spinner.[ch]

commit eebf2ac3c2dd1dc567329806e6035a324d1835ab
Author: David Zeuthen <davidz redhat com>
Date:   Sun Aug 23 14:34:54 2009 -0400

    Forgot to add gdu-spinner.[ch]

 src/gdu-gtk/gdu-spinner.c |  364 +++++++++++++++++++++++++++++++++++++++++++++
 src/gdu-gtk/gdu-spinner.h |   59 ++++++++
 2 files changed, 423 insertions(+), 0 deletions(-)
---
diff --git a/src/gdu-gtk/gdu-spinner.c b/src/gdu-gtk/gdu-spinner.c
new file mode 100644
index 0000000..9484631
--- /dev/null
+++ b/src/gdu-gtk/gdu-spinner.c
@@ -0,0 +1,364 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/*
+ * Based on BlingSpinner: 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 <string.h>
+
+#include "gdu-spinner.h"
+
+typedef struct {
+		gfloat red;
+		gfloat green;
+		gfloat blue;
+		gfloat alpha;
+} BlingColor;
+
+static int
+getdec(char hexchar)
+{
+   if ((hexchar >= '0') && (hexchar <= '9')) return hexchar - '0';
+   if ((hexchar >= 'A') && (hexchar <= 'F')) return hexchar - 'A' + 10;
+   if ((hexchar >= 'a') && (hexchar <= 'f')) return hexchar - 'a' + 10;
+
+   return -1; // Wrong character
+
+}
+
+static void
+hex2float(const char* HexColor, float* FloatColor)
+{
+   const char* HexColorPtr = HexColor;
+
+   int i = 0;
+   for (i = 0; i < 4; i++)
+   {
+	 int IntColor = (getdec(HexColorPtr[0]) * 16) +
+					 getdec(HexColorPtr[1]);
+
+	 FloatColor[i] = (float) IntColor / 255.0;
+	 HexColorPtr += 2;
+   }
+
+}
+
+static void
+bling_color_parse_string (BlingColor *color, const gchar *str)
+{
+		gfloat colors[4];
+		size_t len;
+
+		len = strlen (str);
+		if (len != 8) {
+				/* Always return a valid color */
+				color->red = 0.0;
+				color->green = 0.0;
+				color->blue = 0.0;
+				color->alpha = 1.0;
+		} else {
+				hex2float (str, colors);
+				color->red = colors[0];
+				color->green = colors[1];
+				color->blue = colors[2];
+				color->alpha = colors[3];
+		}
+}
+
+
+#define GDU_SPINNER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GDU_TYPE_SPINNER, GduSpinnerPrivate))
+
+G_DEFINE_TYPE (GduSpinner, gdu_spinner, GTK_TYPE_DRAWING_AREA);
+
+enum
+{
+	PROP_0,
+	PROP_COLOR,
+	PROP_NUM_LINES
+};
+
+/* STRUCTS & ENUMS */
+struct GduSpinnerPrivate
+{
+	/* state */
+	gboolean have_alpha;
+	guint current;
+	guint timeout;
+
+	/* appearance */
+	BlingColor color;
+	guint lines;
+};
+
+/* FORWARDS */
+static void gdu_spinner_class_init(GduSpinnerClass *klass);
+static void gdu_spinner_init(GduSpinner *spinner);
+static void gdu_spinner_set_property(GObject *gobject, guint prop_id, const GValue *value, GParamSpec *pspec);
+static gboolean gdu_spinner_expose(GtkWidget *widget, GdkEventExpose *event);
+static void gdu_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;
+	guint i;
+	int width, height;
+
+	GduSpinnerPrivate *priv;
+
+	priv = GDU_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
+gdu_spinner_class_init(GduSpinnerClass *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 (GduSpinnerPrivate));
+	gobject_class->set_property = gdu_spinner_set_property;
+
+	widget_class = GTK_WIDGET_CLASS(klass);
+	widget_class->expose_event = gdu_spinner_expose;
+	widget_class->screen_changed = gdu_spinner_screen_changed;
+
+	g_object_class_install_property(gobject_class, PROP_COLOR,
+		g_param_spec_string("color", "Color",
+							"Main color",
+							"454545C8",
+							G_PARAM_CONSTRUCT | G_PARAM_WRITABLE));
+
+	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
+gdu_spinner_init (GduSpinner *spinner)
+{
+	GduSpinnerPrivate *priv;
+
+	priv = GDU_SPINNER_GET_PRIVATE (spinner);
+	priv->current = 0;
+	priv->timeout = 0;
+
+	GTK_WIDGET_SET_FLAGS (GTK_WIDGET (spinner), GTK_NO_WINDOW);
+}
+
+static gboolean
+gdu_spinner_expose (GtkWidget *widget, GdkEventExpose *event)
+{
+	cairo_t *cr;
+
+	/* get cairo context */
+	cr = gdk_cairo_create (widget->window);
+
+	/* 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
+gdu_spinner_screen_changed (GtkWidget* widget, GdkScreen* old_screen)
+{
+	GduSpinner *spinner;
+	GduSpinnerPrivate *priv;
+	GdkScreen* new_screen;
+	GdkColormap* colormap;
+
+	spinner = GDU_SPINNER(widget);
+	priv = GDU_SPINNER_GET_PRIVATE (spinner);
+
+	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);
+		priv->have_alpha = FALSE;
+	} else
+		priv->have_alpha = TRUE;
+
+	gtk_widget_set_colormap (widget, colormap);
+}
+
+static gboolean
+gdu_spinner_timeout (gpointer data)
+{
+	GduSpinner *spinner;
+	GduSpinnerPrivate *priv;
+
+	spinner = GDU_SPINNER (data);
+	priv = GDU_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
+gdu_spinner_set_property(GObject *gobject, guint prop_id,
+					const GValue *value, GParamSpec *pspec)
+{
+	GduSpinner *spinner;
+	GduSpinnerPrivate *priv;
+
+	spinner = GDU_SPINNER(gobject);
+	priv = GDU_SPINNER_GET_PRIVATE (spinner);
+
+	switch (prop_id)
+	{
+		case PROP_COLOR:
+			bling_color_parse_string (&priv->color, g_value_get_string(value));
+			break;
+		case PROP_NUM_LINES:
+			priv->lines = g_value_get_uint(value);
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, prop_id, pspec);
+			break;
+	}
+}
+
+/**
+ * gdu_spinner_new
+ *
+ * Returns a default spinner. Not yet started.
+ *
+ * Returns: a new #GduSpinner
+ */
+GtkWidget *
+gdu_spinner_new (void)
+{
+	return g_object_new (GDU_TYPE_SPINNER, NULL);
+}
+
+/**
+ * gdu_spinner_start
+ *
+ * Starts the animation
+ */
+void
+gdu_spinner_start (GduSpinner *spinner)
+{
+	GduSpinnerPrivate *priv;
+
+	g_return_if_fail (GDU_IS_SPINNER (spinner));
+
+	priv = GDU_SPINNER_GET_PRIVATE (spinner);
+	if (priv->timeout != 0)
+		return;
+	priv->timeout = g_timeout_add (80, gdu_spinner_timeout, spinner);
+}
+
+/**
+ * gdu_spinner_stop
+ *
+ * Stops the animation
+ */
+void
+gdu_spinner_stop (GduSpinner *spinner)
+{
+	GduSpinnerPrivate *priv;
+
+	g_return_if_fail (GDU_IS_SPINNER (spinner));
+
+	priv = GDU_SPINNER_GET_PRIVATE (spinner);
+	if (priv->timeout == 0)
+		return;
+	g_source_remove (priv->timeout);
+	priv->timeout = 0;
+}
diff --git a/src/gdu-gtk/gdu-spinner.h b/src/gdu-gtk/gdu-spinner.h
new file mode 100644
index 0000000..d50ecc6
--- /dev/null
+++ b/src/gdu-gtk/gdu-spinner.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
+/*
+ * Based on BlingSpinner: 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 _GDU_SPINNER_H_
+#define _GDU_SPINNER_H_
+
+#include <gdu-gtk/gdu-gtk-types.h>
+
+G_BEGIN_DECLS
+
+#define GDU_TYPE_SPINNER         (gdu_spinner_get_type ())
+#define GDU_SPINNER(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GDU_TYPE_SPINNER, GduSpinner))
+#define GDU_SPINNER_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST ((k), GDU_SPINNER,  GduSpinnerClass))
+#define GDU_IS_SPINNER(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GDU_TYPE_SPINNER))
+#define GDU_IS_SPINNER_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), GDU_TYPE_SPINNER))
+#define GDU_SPINNER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GDU_TYPE_SPINNER, GduSpinnerClass))
+
+typedef struct GduSpinnerClass    GduSpinnerClass;
+typedef struct GduSpinnerPrivate  GduSpinnerPrivate;
+
+struct GduSpinner
+{
+	GtkDrawingArea parent;
+};
+
+struct GduSpinnerClass
+{
+	GtkDrawingAreaClass parent_class;
+	GduSpinnerPrivate *priv;
+};
+
+GType gdu_spinner_get_type (void) G_GNUC_CONST;
+
+GtkWidget *gdu_spinner_new (void);
+
+void gdu_spinner_start (GduSpinner *spinner);
+void gdu_spinner_stop  (GduSpinner *spinner);
+
+G_END_DECLS
+
+#endif
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