fix(btnmamatrix) fix focus event handling

Author: kisvegabor

src/core/lv_group.c

@@ -206,7 +206,7 @@ void lv_group_focus_obj(lv_obj_t * obj)
 
     if(g->frozen != 0) return;
 
-//    if(g->obj_focus != NULL && obj == *g->obj_focus) return;
+    if(g->obj_focus != NULL && obj == *g->obj_focus) return;
 
     /*On defocus edit mode must be leaved*/
     lv_group_set_editing(g, false);

src/core/lv_obj.c

@@ -763,6 +763,7 @@ static void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state)
         lv_obj_refresh_style(obj, LV_PART_ANY, LV_STYLE_PROP_ANY);
     }
     else if(cmp_res == _LV_STYLE_STATE_CMP_DIFF_DRAW_PAD) {
+        lv_obj_invalidate(obj);
         lv_obj_refresh_ext_draw_size(obj);
     }
 }

src/widgets/lv_btnmatrix.c

@@ -517,17 +517,20 @@ static void lv_btnmatrix_event(const lv_obj_class_t * class_p, lv_event_t * e)
         }
 
         bool editing = lv_group_get_editing(lv_obj_get_group(obj));
-        if(indev_type == LV_INDEV_TYPE_KEYPAD|| (indev_type == LV_INDEV_TYPE_ENCODER&& editing)) {
-            uint32_t b = 0;
-            if(btnm->one_check) {
-                while(button_is_hidden(btnm->ctrl_bits[b]) || button_is_inactive(btnm->ctrl_bits[b]) || button_is_checked(btnm->ctrl_bits[b]) == false) b++;
+        /*Focus the first button if there is not selected button*/
+        if(btnm->btn_id_sel == LV_BTNMATRIX_BTN_NONE) {
+            if (indev_type == LV_INDEV_TYPE_KEYPAD || (indev_type == LV_INDEV_TYPE_ENCODER && editing)) {
+                uint32_t b = 0;
+                if(btnm->one_check) {
+                    while(button_is_hidden(btnm->ctrl_bits[b]) || button_is_inactive(btnm->ctrl_bits[b]) || button_is_checked(btnm->ctrl_bits[b]) == false) b++;
+                } else {
+                    while(button_is_hidden(btnm->ctrl_bits[b]) || button_is_inactive(btnm->ctrl_bits[b])) b++;
+                }
+
+                btnm->btn_id_sel = b;
             } else {
-                while(button_is_hidden(btnm->ctrl_bits[b]) || button_is_inactive(btnm->ctrl_bits[b])) b++;
+                btnm->btn_id_sel = LV_BTNMATRIX_BTN_NONE;
             }
-
-            btnm->btn_id_sel = b;
-        } else {
-            btnm->btn_id_sel = LV_BTNMATRIX_BTN_NONE;
         }
     }
     else if(code == LV_EVENT_DEFOCUSED || code == LV_EVENT_LEAVE) {