From 8c5c8ed82a9996cefeecadc99f349f440eb457de Mon Sep 17 00:00:00 2001
From: Ali Rostami <9710249+ali-rostami@users.noreply.github.com>
Date: Sun, 19 May 2019 10:00:59 +0430
Subject: [PATCH] defining lv_group_remove_all_objs

`lv_group_remove_all_objs` is a function for removing all objects from a group and making it free of objects.
---
 src/lv_core/lv_group.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/lv_core/lv_group.c b/src/lv_core/lv_group.c
index fd5f25753..9a3cb6b35 100644
--- a/src/lv_core/lv_group.c
+++ b/src/lv_core/lv_group.c
@@ -193,6 +193,28 @@ void lv_group_remove_obj(lv_obj_t * obj)
     }
 }
 
+/**
+ * remove all objects from a group
+ * @param group pointer to a group
+ */
+void lv_group_remove_all_objs(lv_group_t * group)
+{
+	/*Defocus the the currently focused object*/
+	if(group->obj_focus != NULL) {
+		(*group->obj_focus)->signal_cb(*group->obj_focus, LV_SIGNAL_DEFOCUS, NULL);
+		lv_obj_invalidate(*group->obj_focus);
+		group->obj_focus = NULL;
+	}
+
+	/*Remove the objects from the group*/
+	lv_obj_t ** obj;
+	LV_LL_READ(group->obj_ll, obj) {
+		(*obj)->group_p = NULL;
+	}
+
+	lv_ll_clear(&(group->obj_ll));
+}
+
 /**
  * Focus on an object (defocus the current)
  * @param obj pointer to an object to focus on