From b7f875aba6efad7a1f370d1f6a8c00afe82351c3 Mon Sep 17 00:00:00 2001
From: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
Date: Fri, 14 May 2021 23:56:34 +0200
Subject: [PATCH] refactor(event) change lv_event_get_ext_draw_size_info to
 lv_event_set_ext_draw_size for simpler usage

---
 docs/overview/drawing.md | 7 +------
 src/core/lv_event.c      | 6 +++---
 src/core/lv_event.h      | 6 +++---
 3 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/docs/overview/drawing.md b/docs/overview/drawing.md
index 0fa8e7f1a..73eeaf788 100644
--- a/docs/overview/drawing.md
+++ b/docs/overview/drawing.md
@@ -214,10 +214,5 @@ So it doesn't matter e.g. if a tabel's cell is masked because the tables backgro
 If you need to draw outside of a widget LVGL needs to know about it to provide the extra space for drawing. 
 Let's say you create an event the writes the current value of a slider above its knob. In this case LVGL needs to know that the slider's draw area should be larger with the size required for the text.
 
-`lv_event_get_ext_draw_size_info(event)` return a pointer to an `lv_coord_t` variable in which the extra draw size can be set. 
-Note that, other events also might set the value of this variable so you should set only values larger than the current value. For example:
-```c
-lv_coord_t * s = lv_event_get_ext_draw_size_info(event);
-*s = LV_MAX(*s, 50);
-``` 
+You can simple set the required draw area with `lv_event_set_ext_draw_size(e, size)`. 
 
diff --git a/src/core/lv_event.c b/src/core/lv_event.c
index 868442951..13008b08f 100644
--- a/src/core/lv_event.c
+++ b/src/core/lv_event.c
@@ -289,13 +289,13 @@ uint32_t lv_event_get_key(lv_event_t * e)
     }
 }
 
-lv_coord_t * lv_event_get_ext_draw_size_info(lv_event_t * e)
+void lv_event_set_ext_draw_size(lv_event_t * e, lv_coord_t size)
 {
     if(e->code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
-        return lv_event_get_param(e);
+        lv_coord_t * cur_size = lv_event_get_param(e);
+        *cur_size = LV_MAX(*cur_size, size);
     } else {
         LV_LOG_WARN("Not interpreted with this event code");
-        return 0;
     }
 }
 
diff --git a/src/core/lv_event.h b/src/core/lv_event.h
index 4fa53c294..cd243f212 100644
--- a/src/core/lv_event.h
+++ b/src/core/lv_event.h
@@ -268,11 +268,11 @@ const lv_area_t * lv_event_get_old_size(lv_event_t * e);
 uint32_t lv_event_get_key(lv_event_t * e);
 
 /**
- * Get a pointer to an `lv_coord_t` variable in which the new extra draw size should be saved. Can be used in `LV_EVENT_REFR_EXT_DRAW_SIZE`
+ * Set the new extra draw size. Can be used in `LV_EVENT_REFR_EXT_DRAW_SIZE`
  * @param e     pointer to an event
- * @return      pointer to `lv_coord_t` or NULL if called on an unrelated event
+ * @param size  The new extra draw size
  */
-lv_coord_t * lv_event_get_ext_draw_size_info(lv_event_t * e);
+void lv_event_set_ext_draw_size(lv_event_t * e, lv_coord_t size);
 
 /**
  * Get a pointer to an `lv_point_t` variable in which the self size should be saved (width in `point->x` and height `point->y`).