tabs: improve behavior by making possible to navigate between them by using mouse wheel.

More theme work is needed, but first step for T449.

data/themes/default.edc

@@ -498,6 +498,14 @@ collections {
             signal: "mouse,clicked,1"; source: "tabcount_ev";
             action: SIGNAL_EMIT "tabcount,go" "terminology";
          }
+	 program {
+	    signal: "mouse,wheel,0,-1"; source: "tabcount_ev";
+	    action: SIGNAL_EMIT "tabcount,prev" "terminology";
+	 }
+	 program {
+	    signal: "mouse,wheel,0,1"; source: "tabcount_ev";
+	    action: SIGNAL_EMIT "tabcount,next" "terminology";
+	 }
          program {
             signal: "tabcount,off"; source: "terminology";
             action: STATE_SET "default" 0.0;

src/bin/main.c

@@ -1999,6 +1999,18 @@ main_term_free(Term *term)
    free(term);
 }
 
+static void
+_cb_tabcount_prev(void *data, Evas_Object *obj EINA_UNUSED, const char *sig EINA_UNUSED, const char *src EINA_UNUSED)
+{
+   _cb_prev(data, NULL, NULL);
+}
+
+static void
+_cb_tabcount_next(void *data, Evas_Object *obj EINA_UNUSED, const char *sig EINA_UNUSED, const char *src EINA_UNUSED)
+{
+   _cb_next(data, NULL, NULL);
+}
+
 static void
 main_term_bg_config(Term *term)
 {
@@ -2012,12 +2024,16 @@ main_term_bg_config(Term *term)
         edje_object_signal_emit(term->bg, "translucent,off", "terminology");
         edje_object_signal_emit(term->base, "translucent,off", "terminology");
      }
-   
+
    termio_theme_set(term->term, term->bg);
    edje_object_signal_callback_add(term->bg, "popmedia,done", "terminology",
                                    _cb_popmedia_done, term); 
    edje_object_signal_callback_add(term->bg, "tabcount,go", "terminology",
                                    _cb_tabcount_go, term);
+   edje_object_signal_callback_add(term->bg, "tabcount,prev", "terminology",
+                                   _cb_tabcount_prev, term);
+   edje_object_signal_callback_add(term->bg, "tabcount,next", "terminology",
+                                   _cb_tabcount_next, term);
    edje_object_part_swallow(term->base, "terminology.content", term->term);
    edje_object_part_swallow(term->bg, "terminology.content", term->base);
    if (term->popmedia)
@@ -2165,6 +2181,10 @@ main_term_new(Win *wn, Config *config, const char *cmd,
                                    _cb_popmedia_done, term);
    edje_object_signal_callback_add(term->bg, "tabcount,go", "terminology",
                                    _cb_tabcount_go, term);
+   edje_object_signal_callback_add(term->bg, "tabcount,prev", "terminology",
+                                   _cb_tabcount_prev, term);
+   edje_object_signal_callback_add(term->bg, "tabcount,next", "terminology",
+                                   _cb_tabcount_next, term);
 
    evas_object_size_hint_weight_set(o, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
    evas_object_size_hint_fill_set(o, EVAS_HINT_FILL, EVAS_HINT_FILL);