/* Called for every event a link receives. Right now it's used to
* set a message in the statusbar */
static gint
link_item_event (GnomeCanvasItem * item, GdkEvent * event,
canvas_link_t * canvas_link)
{
gchar *str;
const link_t *link=NULL;
switch (event->type)
{
case GDK_2BUTTON_PRESS:
if (canvas_link)
link_info_window_create( &canvas_link->canvas_link_id );
break;
case GDK_ENTER_NOTIFY:
if (canvas_link)
link = links_catalog_find(&canvas_link->canvas_link_id);
if (link && link->main_prot[pref.stack_level])
str = g_strdup_printf (_("Link main protocol: %s"),
link->main_prot[pref.stack_level]);
else
str = g_strdup_printf (_("Link main protocol unknown"));
gtk_statusbar_push(appdata.statusbar, 1, str);
g_free (str);
break;
case GDK_LEAVE_NOTIFY:
gtk_statusbar_pop(appdata.statusbar, 1);
break;
default:
break;
}
return FALSE;
} /* link_item_event */
/* finds a link, creating one if necessary */
link_t *links_catalog_find_create(const link_id_t *key)
{
link_t *link;
g_assert(all_links);
g_assert(key);
link = links_catalog_find(key);
if (!link)
{
link = link_create(key);
links_catalog_insert(link);
}
return link;
}
/* - calls update_links, so that the related link updates its average
* traffic and main protocol, and old links are deleted
* - caculates link size and color fading */
static gint
canvas_link_update(link_id_t * link_id, canvas_link_t * canvas_link,
GList **delete_list)
{
const link_t *link;
const canvas_node_t *canvas_dst;
const canvas_node_t *canvas_src;
guint32 scaledColor;
double xs, ys, xd, yd, scale;
/* We used to run update_link here, but that was a major performance penalty,
* and now it is done in update_diagram */
link = links_catalog_find(link_id);
if (!link)
{
*delete_list = g_list_prepend( *delete_list, link_id);
g_my_debug ("Queing canvas link to remove.");
return FALSE;
}
/* If either source or destination has disappeared, we hide the link
* until it can be show again */
/* We get coords for the destination node */
canvas_dst = g_tree_lookup (canvas_nodes, &link_id->dst);
if (!canvas_dst || !canvas_dst->shown)
{
gnome_canvas_item_hide (canvas_link->src_item);
gnome_canvas_item_hide (canvas_link->dst_item);
return FALSE;
}
/* We get coords from source node */
canvas_src = g_tree_lookup (canvas_nodes, &link_id->src);
if (!canvas_src || !canvas_src->shown)
{
gnome_canvas_item_hide (canvas_link->src_item);
gnome_canvas_item_hide (canvas_link->dst_item);
return FALSE;
}
/* What if there never is a protocol?
* I have to initialize canvas_link->color to a known value */
if (link->main_prot[pref.stack_level])
{
double diffms;
canvas_link->color = protohash_color(link->main_prot[pref.stack_level]);
/* scale color down to 10% at link timeout */
diffms = substract_times_ms(&appdata.now, &link->link_stats.stats.last_time);
scale = pow(0.10, diffms / pref.gui_link_timeout_time);
scaledColor =
(((int) (scale * canvas_link->color.red) & 0xFF00) << 16) |
(((int) (scale * canvas_link->color.green) & 0xFF00) << 8) |
((int) (scale * canvas_link->color.blue) & 0xFF00) | 0xFF;
}
else
{
guint32 black = 0x000000ff;
scaledColor = black;
}
/* retrieve coordinates of node centers */
g_object_get (G_OBJECT (canvas_src->group_item), "x", &xs, "y", &ys, NULL);
g_object_get (G_OBJECT (canvas_dst->group_item), "x", &xd, "y", &yd, NULL);
/* first draw triangle for src->dst */
draw_oneside_link(xs, ys, xd, yd, &(link->link_stats.stats_out), scaledColor,
canvas_link->src_item);
/* then draw triangle for dst->src */
draw_oneside_link(xd, yd, xs, ys, &(link->link_stats.stats_in), scaledColor,
canvas_link->dst_item);
return FALSE;
} /* update_canvas_links */
