[PATCH 2/3] Added a quick method to update dive ratings from the dive list

[Lubomir I. Ivanov]

From: "Lubomir I. Ivanov" <neolit123 at gmail.com>

When hovering over dives in the dive list, it is now possible
to hold the CTRL key and use the mouse wheel to quickly
set the hovered dive rating.

Signed-off-by: Lubomir I. Ivanov <neolit123 at gmail.com>
---

i was first looking at using ALT (GDK_MOD1_MASK), but it had odd behaviour
on Ubuntu 12.04 in a VM. also, i'm not sure if ctrl + mouse wheel is confortable
(or even possible) on the Mac.

---
 divelist.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/divelist.c b/divelist.c
index 8b86c53..c5f4c10 100644
--- a/divelist.c
+++ b/divelist.c
@@ -1698,6 +1698,41 @@ static void show_gps_location_cb(GtkWidget *menuitem, struct dive *dive)
 }
 #endif
 
+gboolean rating_scroll_cb(GtkWidget *w, GdkEventScroll *event, gpointer data)
+{
+	GtkTreePath *path = NULL;
+	GtkTreeIter iter;
+	GtkTreeViewColumn *col;
+	int idx;
+	struct dive *dive;
+
+	if ((event->state & GDK_CONTROL_MASK) != 0 &&
+	    gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(dive_list.tree_view), event->x, event->y, &path, &col, NULL, NULL)) {
+		if (col == data) {
+			gtk_tree_model_get_iter(MODEL(dive_list), &iter, path);
+			gtk_tree_model_get(MODEL(dive_list), &iter, DIVE_INDEX, &idx, -1);
+			dive = get_dive(idx);
+			if (dive) {
+				if (event->direction == GDK_SCROLL_UP) {
+					dive->rating--;
+					if (dive->rating < 0)
+						dive->rating = 0;
+				} else if (event->direction == GDK_SCROLL_DOWN) {
+					dive->rating++;
+					if (dive->rating > 5)
+						dive->rating = 5;
+				}
+				mark_divelist_changed(TRUE);
+				flush_divelist(dive);
+			}
+		}
+		if (path)
+			gtk_tree_path_free(path);
+		return TRUE;
+	}
+	return FALSE;
+}
+
 gboolean icon_click_cb(GtkWidget *w, GdkEventButton *event, gpointer data)
 {
 #if HAVE_OSM_GPS_MAP
@@ -2769,6 +2804,8 @@ GtkWidget *dive_list_create(void)
 	dive_list.otu = divelist_column(&dive_list, dl_column + DIVE_OTU);
 	dive_list.maxcns = divelist_column(&dive_list, dl_column + DIVE_MAXCNS);
 	dive_list.location = divelist_column(&dive_list, dl_column + DIVE_LOCATION);
+	/* update dive rating */
+	g_signal_connect(dive_list.tree_view, "scroll-event", G_CALLBACK(rating_scroll_cb), dive_list.stars);
 	/* now add the GPS icon to the location column */
 	tree_view_column_add_pixbuf(dive_list.tree_view, gpsicon_data_func, dive_list.location);
 
-- 
1.7.11.msysgit.0