win: be able to drag'n'drop tabs over the tabbar

ChangeLog.theme

@@ -6,6 +6,8 @@ Changes since 1.6.0:
 --------------------
   * In group "terminology/tabbar_back", add signal "bell,off" from "terminology"
   to unmark a tab as having missed the bell.
+  * In group "terminology/background", signals "tab,drag" and "tab,drag,stop"
+  are emitted when the current tab is dragged.
 
 Changes since 1.5.0:
 --------------------

THEME.md

@@ -84,6 +84,10 @@ Whether to display a tab bar. Default is off.
 ### `tab_btn,off` and `tab_btn,on`
 Whether to display a tab button to easily navigate through tabs. Default is off.
 
+## Signal emitted
+### `tab,drag` and `tab,drage,stop`
+To notify that the current tab is being dragged.
+
 
 
 # `terminology/about`

data/themes/default.edc

@@ -1769,6 +1769,40 @@ collections {
                visible: 1;
             }
          }
+          program {
+             signal: "mouse,up,1"; source: "tabmiddle";
+             action: SIGNAL_EMIT "tab,drag,stop" "terminology";
+          }
+         program {
+            signal: "mouse,move"; source: "tabmiddle";
+            script {
+               new y, h, drag_x, drag_w;
+               if (!get_mouse_buttons())
+                 return;
+               get_geometry(PART:"tabdrag", drag_x, y, drag_w, h);
+               if (drag_w > 0) {
+                  new m_x, m_y;
+                  new Float:mid;
+                  new Float:d;
+                  new Float:v1;
+                  new Float:v2;
+                  new Float:n;
+
+                  get_mouse(m_x, m_y);
+                  mid = m_x - drag_x;
+                  mid = mid / drag_w;
+
+                  get_drag(PART:"terminology.tabl", v1, n);
+                  get_drag(PART:"terminology.tabr", v2, n);
+
+                  d = (v2 - v1) / 2;
+                  set_drag(PART:"terminology.tabl", mid - d, 0.0);
+                  set_drag(PART:"terminology.tabr", mid + d, 0.0);
+                  emit("tab,drag", "terminology");
+               }
+            }
+         }
+
          program {
             signal: "mouse,down,1,double"; source: "tabmiddle";
             action: SIGNAL_EMIT "tab,title" "terminology";

src/bin/win.c

@@ -2828,6 +2828,8 @@ _tabbar_clear(Term *term)
         evas_object_del(term->tab_spacer);
         term->tab_spacer = NULL;
      }
+   if (term->tab_inactive)
+     evas_object_hide(term->tab_inactive);
 }
 
 static void
@@ -2907,7 +2909,7 @@ _tabs_recompute_drag(Tabs *tabs)
      {
         v1 = (double)(idx) / (double)n;
         v2 = (double)(idx+1) / (double)n;
-        tabs->hysteresis_step = 0.67 / (n - 1);
+        tabs->hysteresis_step = 0.67 / (double)n;
      }
    tabs->v1_orig = v1;
    tabs->v2_orig = v2;
@@ -2925,7 +2927,10 @@ _tabs_on_drag_stop(void *data,
    Term *term = data;
    Tabs *tabs = evas_object_data_get(term->bg, "tabs");
 
-   _tabs_recompute_drag(tabs);
+   edje_object_part_drag_value_set(term->bg_edj, "terminology.tabl",
+                                   tabs->v1_orig, 0.0);
+   edje_object_part_drag_value_set(term->bg_edj, "terminology.tabr",
+                                   tabs->v2_orig, 0.0);
 }
 
 static void
@@ -2935,7 +2940,6 @@ _tabs_on_drag(void *data,
               const char *source EINA_UNUSED)
 {
    Eina_List *l, *next, *prev;
-   double val;
    int tab_active_idx;
    int n;
    Tabs *tabs;
@@ -2962,10 +2966,12 @@ _tabs_on_drag(void *data,
    term = solo->term;
 
    edje_object_part_drag_value_get(term->bg_edj, "terminology.tabl",
-                                   &val, NULL);
+                                   &v1, NULL);
+   edje_object_part_drag_value_get(term->bg_edj, "terminology.tabr",
+                                   &v2, NULL);
    while ((tab_active_idx < n - 1) &&
-       ((val > tabs->v1_orig + tabs->hysteresis_step) ||
-        (val > 1 - tabs->hysteresis_step)))
+       ((v2 > tabs->v2_orig + tabs->hysteresis_step) ||
+        (v2 > 1 - tabs->hysteresis_step)))
      {
         /* To the right */
         l = eina_list_nth_list(tabs->tabs, tab_active_idx);
@@ -2973,7 +2979,7 @@ _tabs_on_drag(void *data,
         item_moved = next->data;
         term_moved = _tab_item_to_term(item_moved);
         elm_box_unpack(term->tabbar.r.box, term_moved->tab_inactive);
-        elm_box_pack_start(term->tabbar.l.box, term_moved->tab_inactive);
+        elm_box_pack_end(term->tabbar.l.box, term_moved->tab_inactive);
 
         tabs->tabs = eina_list_remove_list(tabs->tabs, l);
         tabs->tabs = eina_list_append_relative_list(tabs->tabs,
@@ -2983,8 +2989,8 @@ _tabs_on_drag(void *data,
         return;
      }
    while ((tab_active_idx > 0) &&
-       ((val < tabs->v1_orig - tabs->hysteresis_step) ||
-        (val < tabs->hysteresis_step)))
+       ((v1 < tabs->v1_orig - tabs->hysteresis_step) ||
+        (v1 < tabs->hysteresis_step)))
      {
         /* To the left */
         l = eina_list_nth_list(tabs->tabs, tab_active_idx);
@@ -2992,7 +2998,7 @@ _tabs_on_drag(void *data,
         item_moved = prev->data;
         term_moved = _tab_item_to_term(item_moved);
         elm_box_unpack(term->tabbar.l.box, term_moved->tab_inactive);
-        elm_box_pack_end(term->tabbar.r.box, term_moved->tab_inactive);
+        elm_box_pack_start(term->tabbar.r.box, term_moved->tab_inactive);
 
         tabs->tabs = eina_list_remove_list(tabs->tabs, prev);
         tabs->tabs = eina_list_append_relative_list(tabs->tabs,
@@ -4084,6 +4090,9 @@ _tabs_recreate(Tabs *tabs)
         solo = (Solo*) tab_item->tc;
         term = solo->term;
 
+        if (term->tab_inactive)
+          evas_object_hide(term->tab_inactive);
+
         if (term->missed_bell)
           missed++;
      }