fix(obj): remove all events from the object (#7811)

Co-authored-by: Fabian Zäh <Fabian.Zaeh@livetec.de>

src/core/lv_obj_event.c

@@ -126,23 +126,6 @@ bool lv_obj_remove_event(lv_obj_t * obj, uint32_t index)
     return lv_event_remove(&obj->spec_attr->event_list, index);
 }
 
-bool lv_obj_remove_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb)
-{
-    LV_ASSERT_NULL(obj);
-
-    uint32_t event_cnt = lv_obj_get_event_count(obj);
-    uint32_t i;
-    for(i = 0; i < event_cnt; i++) {
-        lv_event_dsc_t * dsc = lv_obj_get_event_dsc(obj, i);
-        if(dsc && dsc->cb == event_cb) {
-            lv_obj_remove_event(obj, i);
-            return true;
-        }
-    }
-
-    return false;
-}
-
 bool lv_obj_remove_event_dsc(lv_obj_t * obj, lv_event_dsc_t * dsc)
 {
     LV_ASSERT_NULL(obj);
@@ -151,6 +134,24 @@ bool lv_obj_remove_event_dsc(lv_obj_t * obj, lv_event_dsc_t * dsc)
     return lv_event_remove_dsc(&obj->spec_attr->event_list, dsc);
 }
 
+uint32_t lv_obj_remove_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb)
+{
+    LV_ASSERT_NULL(obj);
+
+    uint32_t event_cnt = lv_obj_get_event_count(obj);
+    uint32_t removed_count = 0;
+    uint32_t i;
+    for(i = 0; i < event_cnt; i++) {
+        lv_event_dsc_t * dsc = lv_obj_get_event_dsc(obj, i);
+        if(dsc && dsc->cb == event_cb) {
+            lv_obj_remove_event(obj, i);
+            removed_count++;
+        }
+    }
+
+    return removed_count;
+}
+
 uint32_t lv_obj_remove_event_cb_with_user_data(lv_obj_t * obj, lv_event_cb_t event_cb, void * user_data)
 {
     LV_ASSERT_NULL(obj);

src/core/lv_obj_event.h

@@ -86,10 +86,16 @@ lv_event_dsc_t * lv_obj_get_event_dsc(lv_obj_t * obj, uint32_t index);
 
 bool lv_obj_remove_event(lv_obj_t * obj, uint32_t index);
 
-bool lv_obj_remove_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb);
-
 bool lv_obj_remove_event_dsc(lv_obj_t * obj, lv_event_dsc_t * dsc);
 
+/**
+ * Remove an event_cb from an object
+ * @param obj           pointer to a obj
+ * @param event_cb      the event_cb of the event to remove
+ * @return              the count of the event removed
+ */
+uint32_t lv_obj_remove_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb);
+
 /**
  * Remove an event_cb with user_data
  * @param obj           pointer to a obj