/** * clock.c * * A GTK+ widget that implements a clock face * * (c) 2007, Peter Teichman * (c) 2005-2006, Davyd Madeley * * Authors: * Davyd Madeley * Peter Teichman */ #include #include #include #include "clock-face.h" #include "clock-location.h" #include "clock-utils.h" static GHashTable *pixbuf_cache = NULL; #define CLOCK_FACE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), INTL_TYPE_CLOCK_FACE, ClockFacePrivate)) G_DEFINE_TYPE (ClockFace, clock_face, GTK_TYPE_WIDGET) static void clock_face_finalize (GObject *); static gboolean clock_face_draw (GtkWidget *clock, cairo_t *cr); static void clock_face_get_preferred_width (GtkWidget *this, gint *minimal_width, gint *natural_width); static void clock_face_get_preferred_height (GtkWidget *this, gint *minimal_height, gint *natural_height); static void clock_face_size_allocate (GtkWidget *clock, GtkAllocation *allocation); static void update_time_and_face (ClockFace *this, gboolean force_face_loading); static void clock_face_load_face (ClockFace *this, gint width, gint height); typedef struct _ClockFacePrivate ClockFacePrivate; typedef enum { CLOCK_FACE_MORNING, CLOCK_FACE_DAY, CLOCK_FACE_EVENING, CLOCK_FACE_NIGHT, CLOCK_FACE_INVALID } ClockFaceTimeOfDay; struct _ClockFacePrivate { struct tm time; /* the time on the clock face */ int minute_offset; /* the offset of the minutes hand */ ClockFaceSize size; ClockFaceTimeOfDay timeofday; ClockLocation *location; GdkPixbuf *face_pixbuf; GtkWidget *size_widget; }; static void clock_face_class_init (ClockFaceClass *class) { GObjectClass *obj_class; GtkWidgetClass *widget_class; obj_class = G_OBJECT_CLASS (class); widget_class = GTK_WIDGET_CLASS (class); /* GtkWidget signals */ widget_class->draw = clock_face_draw; widget_class->get_preferred_width = clock_face_get_preferred_width; widget_class->get_preferred_height = clock_face_get_preferred_height; widget_class->size_allocate = clock_face_size_allocate; /* GObject signals */ obj_class->finalize = clock_face_finalize; g_type_class_add_private (obj_class, sizeof (ClockFacePrivate)); } static void clock_face_init (ClockFace *this) { ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (this); priv->size = CLOCK_FACE_SMALL; priv->timeofday = CLOCK_FACE_INVALID; priv->location = NULL; priv->size_widget = NULL; gtk_widget_set_has_window (GTK_WIDGET (this), FALSE); } static gboolean clock_face_draw (GtkWidget *this, cairo_t *cr) { ClockFacePrivate *priv; int width, height; double x, y; double radius; int hours, minutes, seconds; /* Hand lengths as a multiple of the clock radius */ double hour_length, min_length, sec_length; priv = CLOCK_FACE_GET_PRIVATE (this); if (GTK_WIDGET_CLASS (clock_face_parent_class)->draw) GTK_WIDGET_CLASS (clock_face_parent_class)->draw (this, cr); if (priv->size == CLOCK_FACE_LARGE) { hour_length = 0.45; min_length = 0.6; sec_length = 0.65; } else { hour_length = 0.5; min_length = 0.7; sec_length = 0.8; /* not drawn currently */ } width = gtk_widget_get_allocated_width (this); height = gtk_widget_get_allocated_width (this); x = width / 2; y = height / 2; radius = MIN (width / 2, height / 2) - 5; /* clock back */ if (priv->face_pixbuf) { cairo_save (cr); gdk_cairo_set_source_pixbuf (cr, priv->face_pixbuf, 0, 0); cairo_paint (cr); cairo_restore (cr); } /* clock hands */ hours = priv->time.tm_hour; minutes = priv->time.tm_min + priv->minute_offset; seconds = priv->time.tm_sec; cairo_set_line_width (cr, 1); /* hour hand: * the hour hand is rotated 30 degrees (pi/6 r) per hour + * 1/2 a degree (pi/360 r) per minute */ cairo_save (cr); cairo_move_to (cr, x, y); cairo_line_to (cr, x + radius * hour_length * sin (M_PI / 6 * hours + M_PI / 360 * minutes), y + radius * hour_length * -cos (M_PI / 6 * hours + M_PI / 360 * minutes)); cairo_stroke (cr); cairo_restore (cr); /* minute hand: * the minute hand is rotated 6 degrees (pi/30 r) per minute */ cairo_move_to (cr, x, y); cairo_line_to (cr, x + radius * min_length * sin (M_PI / 30 * minutes), y + radius * min_length * -cos (M_PI / 30 * minutes)); cairo_stroke (cr); /* seconds hand: * operates identically to the minute hand */ if (priv->size == CLOCK_FACE_LARGE) { cairo_save (cr); cairo_set_source_rgb (cr, 0.937, 0.161, 0.161); /* tango red */ cairo_move_to (cr, x, y); cairo_line_to (cr, x + radius * sec_length * sin (M_PI / 30 * seconds), y + radius * sec_length * -cos (M_PI / 30 * seconds)); cairo_stroke (cr); cairo_restore (cr); } return FALSE; } static void clock_face_redraw_canvas (ClockFace *this) { gtk_widget_queue_draw (GTK_WIDGET (this)); } static void clock_face_get_preferred_width (GtkWidget *this, gint *minimal_width, gint *natural_width) { ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (this); if (priv->size_widget != NULL) { int child_minimal_height; int child_natural_height; /* Tie our size to the height of the size_widget */ gtk_widget_get_preferred_height (GTK_WIDGET (priv->size_widget), &child_minimal_height, &child_natural_height); /* Pad out our height by a little bit - this improves the balance */ *minimal_width = child_minimal_height + child_minimal_height / 8; *natural_width = child_natural_height + child_natural_height / 8; } else if (priv->face_pixbuf != NULL) { /* Use the size of the current pixbuf */ *minimal_width = *natural_width = gdk_pixbuf_get_width (GDK_PIXBUF (priv->face_pixbuf)); } else { /* we don't know anything, so use known dimensions for the svg * files */ if (priv->size == CLOCK_FACE_LARGE) *minimal_width = *natural_width = 50; else *minimal_width = *natural_width = 36; } } static void clock_face_get_preferred_height (GtkWidget *this, gint *minimal_height, gint *natural_height) { ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (this); if (priv->size_widget != NULL) { int child_minimal_height; int child_natural_height; /* Tie our size to the height of the size_widget */ gtk_widget_get_preferred_height (GTK_WIDGET (priv->size_widget), &child_minimal_height, &child_natural_height); /* Pad out our height by a little bit - this improves the balance */ *minimal_height = child_minimal_height + child_minimal_height / 8; *natural_height = child_natural_height + child_natural_height / 8; } else if (priv->face_pixbuf != NULL) { /* Use the size of the current pixbuf */ *minimal_height = *natural_height = gdk_pixbuf_get_height (GDK_PIXBUF (priv->face_pixbuf)); } else { /* we don't know anything, so use known dimensions for the svg * files */ if (priv->size == CLOCK_FACE_LARGE) *minimal_height = *natural_height = 50; else *minimal_height = *natural_height = 36; } } static void clock_face_size_allocate (GtkWidget *this, GtkAllocation *allocation) { GtkAllocation this_allocation; GtkAllocation old_allocation; gtk_widget_get_allocation (this, &this_allocation); old_allocation.width = this_allocation.width; old_allocation.height = this_allocation.height; if (GTK_WIDGET_CLASS (clock_face_parent_class)->size_allocate) GTK_WIDGET_CLASS (clock_face_parent_class)->size_allocate (this, allocation); if (old_allocation.width == allocation->width && old_allocation.height == allocation->height) return; /* Reload the face for the new size */ update_time_and_face (CLOCK_FACE (this), TRUE); } static void update_time_and_face (ClockFace *this, gboolean force_face_loading) { ClockFacePrivate *priv; ClockFaceTimeOfDay timeofday; priv = CLOCK_FACE_GET_PRIVATE (this); /* update the time */ if (priv->location) { clock_location_localtime (priv->location, &priv->time); } else { time_t timet; time (&timet); localtime_r (&timet, &priv->time); } /* FIXME this should be a pref in gsetting * Or we could use some code from clock-sun.c? * currently we hardcode * morning 7-9 * day 9-17 * evening 17-22 * night 22-7 */ if (priv->time.tm_hour < 7) timeofday = CLOCK_FACE_NIGHT; else if (priv->time.tm_hour < 9) timeofday = CLOCK_FACE_MORNING; else if (priv->time.tm_hour < 17) timeofday = CLOCK_FACE_DAY; else if (priv->time.tm_hour < 22) timeofday = CLOCK_FACE_EVENING; else timeofday = CLOCK_FACE_NIGHT; if (priv->timeofday != timeofday || force_face_loading) { GtkAllocation allocation; gint width, height; priv->timeofday = timeofday; gtk_widget_get_allocation (GTK_WIDGET (this), &allocation); width = allocation.width; height = allocation.height; /* Only load the pixbuf if we have some space allocated. * Note that 1x1 is not really some space... */ if (width > 1 && height > 1) clock_face_load_face (this, width, height); } } gboolean clock_face_refresh (ClockFace *this) { update_time_and_face (this, FALSE); clock_face_redraw_canvas (this); return TRUE; /* keep running this event */ } GtkWidget * clock_face_new (ClockFaceSize size) { GObject *obj = g_object_new (INTL_TYPE_CLOCK_FACE, NULL); ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (obj); priv->size = size; return GTK_WIDGET (obj); } GtkWidget * clock_face_new_with_location (ClockFaceSize size, ClockLocation *loc, GtkWidget *size_widget) { GObject *obj = g_object_new (INTL_TYPE_CLOCK_FACE, NULL); ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (obj); priv->size = size; priv->location = g_object_ref (loc); priv->size_widget = g_object_ref (size_widget); return GTK_WIDGET (obj); } static void clock_face_finalize (GObject *obj) { ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (obj); if (priv->location) { g_object_unref (priv->location); priv->location = NULL; } if (priv->face_pixbuf) { g_object_unref (priv->face_pixbuf); priv->face_pixbuf = NULL; } if (priv->size_widget) { g_object_unref (priv->size_widget); priv->size_widget = NULL; } G_OBJECT_CLASS (clock_face_parent_class)->finalize (obj); if (pixbuf_cache && g_hash_table_size (pixbuf_cache) == 0) { g_hash_table_destroy (pixbuf_cache); pixbuf_cache = NULL; } } /* The pixbuf is being disposed, so remove it from the cache */ static void remove_pixbuf_from_cache (const char *key, GObject *pixbuf) { g_hash_table_remove (pixbuf_cache, key); } static void clock_face_load_face (ClockFace *this, gint width, gint height) { ClockFacePrivate *priv = CLOCK_FACE_GET_PRIVATE (this); const gchar *size_string[2] = { "small", "large" }; const gchar *daytime_string[4] = { "morning", "day", "evening", "night" }; gchar *cache_name; gchar *name; if (!pixbuf_cache) pixbuf_cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); if (priv->face_pixbuf != NULL) { /* This might empty the cache, but it's useless to destroy * it since this object is still alive and might add another * pixbuf in the cache later (eg, a few lines below) */ g_object_unref (priv->face_pixbuf); priv->face_pixbuf = NULL; } /* Look for the pixbuf in the process-wide cache first */ cache_name = g_strdup_printf ("%d-%d-%d-%d", priv->size, priv->timeofday, width, height); priv->face_pixbuf = g_hash_table_lookup (pixbuf_cache, cache_name); if (priv->face_pixbuf) { g_object_ref (priv->face_pixbuf); g_free (cache_name); return; } /* The pixbuf is not cached, let's load it */ name = g_strconcat (ICONDIR, "/clock-face-", size_string[priv->size], "-", daytime_string[priv->timeofday], ".svg", NULL); priv->face_pixbuf = clock_utils_pixbuf_from_svg_file_at_size (name, width, height); g_free (name); if (!priv->face_pixbuf) { name = g_strconcat (ICONDIR, "/clock-face-", size_string[priv->size], ".svg", NULL); priv->face_pixbuf = clock_utils_pixbuf_from_svg_file_at_size (name, width, height); g_free (name); } /* Save the found pixbuf in the cache */ if (priv->face_pixbuf) { g_hash_table_replace (pixbuf_cache, cache_name, priv->face_pixbuf); /* This will handle automatic removal from the cache when * the pixbuf isn't needed anymore */ g_object_weak_ref (G_OBJECT (priv->face_pixbuf), (GWeakNotify) remove_pixbuf_from_cache, cache_name); } else g_free (cache_name); }