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/*
* Copyright (C) 2007-2010 Nick Schermer <nick@xfce.org>
*
* This library 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 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 General Public License for
* more details.
*
* You should have received a copy of the GNU Library 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_MATH_H
#include <math.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <gtk/gtk.h>
#include <cairo/cairo.h>
#include "clock.h"
#include "clock-analog.h"
#define CLOCK_SCALE 0.1
#define TICKS_TO_RADIANS(x) (G_PI - (G_PI / 30.0) * (x))
#define HOURS_TO_RADIANS(x,y) (G_PI - (G_PI / 6.0) * (((x) > 12 ? (x) - 12 : (x)) + (y) / 60.0))
static void xfce_clock_analog_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void xfce_clock_analog_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void xfce_clock_analog_finalize (GObject *object);
static gboolean xfce_clock_analog_expose_event (GtkWidget *widget,
GdkEventExpose *event);
static void xfce_clock_analog_draw_ticks (cairo_t *cr,
gdouble xc,
gdouble yc,
gdouble radius);
static void xfce_clock_analog_draw_pointer (cairo_t *cr,
gdouble xc,
gdouble yc,
gdouble radius,
gdouble angle,
gdouble scale,
gboolean line);
static gboolean xfce_clock_analog_update (gpointer user_data);
enum
{
PROP_0,
PROP_SHOW_SECONDS,
PROP_SIZE_RATIO,
PROP_ORIENTATION
};
struct _XfceClockAnalogClass
{
GtkImageClass __parent__;
};
struct _XfceClockAnalog
{
GtkImage __parent__;
ClockPluginTimeout *timeout;
guint show_seconds : 1;
};
XFCE_PANEL_DEFINE_TYPE (XfceClockAnalog, xfce_clock_analog, GTK_TYPE_IMAGE)
static void
xfce_clock_analog_class_init (XfceClockAnalogClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *gtkwidget_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = xfce_clock_analog_set_property;
gobject_class->get_property = xfce_clock_analog_get_property;
gobject_class->finalize = xfce_clock_analog_finalize;
gtkwidget_class = GTK_WIDGET_CLASS (klass);
gtkwidget_class->expose_event = xfce_clock_analog_expose_event;
g_object_class_install_property (gobject_class,
PROP_SIZE_RATIO,
g_param_spec_double ("size-ratio", NULL, NULL,
-1, G_MAXDOUBLE, 1.0,
G_PARAM_READABLE
| G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_ORIENTATION,
g_param_spec_enum ("orientation", NULL, NULL,
GTK_TYPE_ORIENTATION,
GTK_ORIENTATION_HORIZONTAL,
G_PARAM_WRITABLE
| G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_SHOW_SECONDS,
g_param_spec_boolean ("show-seconds", NULL, NULL,
FALSE,
G_PARAM_READWRITE
| G_PARAM_STATIC_STRINGS));
}
static void
xfce_clock_analog_init (XfceClockAnalog *analog)
{
analog->show_seconds = FALSE;
analog->timeout = clock_plugin_timeout_new (CLOCK_INTERVAL_MINUTE,
xfce_clock_analog_update,
analog);
}
static void
xfce_clock_analog_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
XfceClockAnalog *analog = XFCE_CLOCK_ANALOG (object);
switch (prop_id)
{
case PROP_ORIENTATION:
break;
case PROP_SHOW_SECONDS:
analog->show_seconds = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
/* reschedule the timeout and redraw */
clock_plugin_timeout_set_interval (analog->timeout,
analog->show_seconds ? CLOCK_INTERVAL_SECOND : CLOCK_INTERVAL_MINUTE);
xfce_clock_analog_update (analog);
}
static void
xfce_clock_analog_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
XfceClockAnalog *analog = XFCE_CLOCK_ANALOG (object);
switch (prop_id)
{
case PROP_SHOW_SECONDS:
g_value_set_boolean (value, analog->show_seconds);
break;
case PROP_SIZE_RATIO:
g_value_set_double (value, 1.0);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
xfce_clock_analog_finalize (GObject *object)
{
/* stop the timeout */
clock_plugin_timeout_free (XFCE_CLOCK_ANALOG (object)->timeout);
(*G_OBJECT_CLASS (xfce_clock_analog_parent_class)->finalize) (object);
}
static gboolean
xfce_clock_analog_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
XfceClockAnalog *analog = XFCE_CLOCK_ANALOG (widget);
gdouble xc, yc;
gdouble angle, radius;
cairo_t *cr;
struct tm tm;
panel_return_val_if_fail (XFCE_CLOCK_IS_ANALOG (analog), FALSE);
/* get center of the widget and the radius */
xc = (widget->allocation.width / 2.0);
yc = (widget->allocation.height / 2.0);
radius = MIN (xc, yc);
/* add the window offset */
xc += widget->allocation.x;
yc += widget->allocation.y;
/* get the cairo context */
cr = gdk_cairo_create (widget->window);
if (G_LIKELY (cr != NULL))
{
/* clip the drawing region */
gdk_cairo_rectangle (cr, &event->area);
cairo_clip (cr);
/* get the local time */
clock_plugin_get_localtime (&tm);
/* set the line properties */
cairo_set_line_width (cr, 1);
gdk_cairo_set_source_color (cr, &widget->style->fg[GTK_WIDGET_STATE (widget)]);
/* draw the ticks */
xfce_clock_analog_draw_ticks (cr, xc, yc, radius);
if (analog->show_seconds)
{
/* second pointer */
angle = TICKS_TO_RADIANS (tm.tm_sec);
xfce_clock_analog_draw_pointer (cr, xc, yc, radius, angle, 0.7, TRUE);
}
/* minute pointer */
angle = TICKS_TO_RADIANS (tm.tm_min);
xfce_clock_analog_draw_pointer (cr, xc, yc, radius, angle, 0.8, FALSE);
/* hour pointer */
angle = HOURS_TO_RADIANS (tm.tm_hour, tm.tm_min);
xfce_clock_analog_draw_pointer (cr, xc, yc, radius, angle, 0.5, FALSE);
/* cleanup */
cairo_destroy (cr);
}
return FALSE;
}
static void
xfce_clock_analog_draw_ticks (cairo_t *cr,
gdouble xc,
gdouble yc,
gdouble radius)
{
gint i;
gdouble x, y, angle;
for (i = 0; i < 12; i++)
{
/* calculate */
angle = HOURS_TO_RADIANS (i, 0);
x = xc + sin (angle) * (radius * (1.0 - CLOCK_SCALE));
y = yc + cos (angle) * (radius * (1.0 - CLOCK_SCALE));
/* draw arc */
cairo_move_to (cr, x, y);
cairo_arc (cr, x, y, radius * CLOCK_SCALE, 0, 2 * G_PI);
cairo_close_path (cr);
}
/* fill the arcs */
cairo_fill (cr);
}
static void
xfce_clock_analog_draw_pointer (cairo_t *cr,
gdouble xc,
gdouble yc,
gdouble radius,
gdouble angle,
gdouble scale,
gboolean line)
{
gdouble xs, ys;
gdouble xt, yt;
/* calculate tip position */
xt = xc + sin (angle) * radius * scale;
yt = yc + cos (angle) * radius * scale;
if (line)
{
/* draw the line */
cairo_move_to (cr, xc, yc);
cairo_line_to (cr, xt, yt);
/* draw the line */
cairo_stroke (cr);
}
else
{
/* calculate start position */
xs = xc + sin (angle - 0.5 * G_PI) * radius * CLOCK_SCALE;
ys = yc + cos (angle - 0.5 * G_PI) * radius * CLOCK_SCALE;
/* draw the pointer */
cairo_move_to (cr, xs, ys);
cairo_arc (cr, xc, yc, radius * CLOCK_SCALE, -angle + G_PI, -angle);
cairo_line_to (cr, xt, yt);
cairo_close_path (cr);
/* fill the pointer */
cairo_fill (cr);
}
}
static gboolean
xfce_clock_analog_update (gpointer user_data)
{
GtkWidget *widget = GTK_WIDGET (user_data);
panel_return_val_if_fail (XFCE_CLOCK_IS_ANALOG (user_data), FALSE);
/* update if the widget if visible */
if (G_LIKELY (GTK_WIDGET_VISIBLE (widget)))
gtk_widget_queue_draw (widget);
return TRUE;
}
GtkWidget *
xfce_clock_analog_new (void)
{
return g_object_new (XFCE_CLOCK_TYPE_ANALOG, NULL);
}