From 66e70afbb4873a7dd1fd34aa273f2fa86cb7ed39 Mon Sep 17 00:00:00 2001
From: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
Date: Wed, 6 Mar 2019 16:13:04 +0100
Subject: [PATCH] use the obj->top on focus to bring the obj. to the foregorund

---
 lv_core/lv_group.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lv_core/lv_group.c b/lv_core/lv_group.c
index 46b71d15f..3fd4120f6 100644
--- a/lv_core/lv_group.c
+++ b/lv_core/lv_group.c
@@ -24,6 +24,7 @@
 static void style_mod_def(lv_style_t * style);
 static void style_mod_edit_def(lv_style_t * style);
 static void lv_group_refocus(lv_group_t *g);
+static void obj_to_foreground(lv_obj_t * obj);
 
 /**********************
  *  STATIC VARIABLES
@@ -181,6 +182,9 @@ void lv_group_focus_obj(lv_obj_t * obj)
                 (*g->obj_focus)->signal_func(*g->obj_focus, LV_SIGNAL_FOCUS, NULL);
                 if(g->focus_cb) g->focus_cb(g);
                 lv_obj_invalidate(*g->obj_focus);
+
+                /*If the object or its parent has `top == true` bring it to the foregorund*/
+                obj_to_foreground(*g->obj_focus);
             }
             break;
         }
@@ -215,6 +219,9 @@ void lv_group_focus_next(lv_group_t * group)
         lv_obj_invalidate(*group->obj_focus);
 
         if(group->focus_cb) group->focus_cb(group);
+
+        /*If the object or its parent has `top == true` bring it to the foregorund*/
+        obj_to_foreground(*group->obj_focus);
     }
 }
 
@@ -246,6 +253,9 @@ void lv_group_focus_prev(lv_group_t * group)
         lv_obj_invalidate(*group->obj_focus);
 
         if(group->focus_cb) group->focus_cb(group);
+
+        /*If the object or its parent has `top == true` bring it to the foregorund*/
+        obj_to_foreground(*group->obj_focus);
     }
 
 }
@@ -522,4 +532,23 @@ static void style_mod_edit_def(lv_style_t * style)
 
 }
 
+static void obj_to_foreground(lv_obj_t * obj)
+{
+    /*Search for 'top' attribute*/
+    lv_obj_t * i = obj;
+    lv_obj_t * last_top = NULL;
+    while(i != NULL) {
+        if(i->top != 0) last_top = i;
+        i = lv_obj_get_parent(i);
+    }
+
+    if(last_top != NULL) {
+        /*Move the last_top object to the foreground*/
+        lv_obj_t * par = lv_obj_get_parent(last_top);
+        /*After list change it will be the new head*/
+        lv_ll_chg_list(&par->child_ll, &par->child_ll, last_top);
+        lv_obj_invalidate(last_top);
+    }
+}
+
 #endif /*USE_LV_GROUP != 0*/