From c9111563b10619131a410c811831c909453a85f5 Mon Sep 17 00:00:00 2001
From: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
Date: Wed, 17 Oct 2018 05:42:27 +0200
Subject: [PATCH] add lv_cont/page_get_width/height

---
 lv_objx/lv_cont.c | 24 ++++++++++++++++++++++++
 lv_objx/lv_cont.h | 15 +++++++++++++++
 lv_objx/lv_page.c | 26 ++++++++++++++++++++++++++
 lv_objx/lv_page.h | 15 +++++++++++++++
 4 files changed, 80 insertions(+)

diff --git a/lv_objx/lv_cont.c b/lv_objx/lv_cont.c
index 89da6ad22..304852a22 100644
--- a/lv_objx/lv_cont.c
+++ b/lv_objx/lv_cont.c
@@ -189,6 +189,30 @@ bool lv_cont_get_ver_fit(const lv_obj_t * cont)
     return ext->ver_fit == 0 ? false : true;
 }
 
+/**
+ * Get that width reduced by the horizontal padding. Useful if a layout is used.
+ * @param cont pointer to a container object
+ * @return the width which still fits into the container
+ */
+lv_coord_t lv_cont_get_fit_width(lv_obj_t * cont)
+{
+    lv_style_t * style = lv_cont_get_style(cont);
+
+    return lv_obj_get_width(cont) - 2 * style->body.padding.hor;
+}
+
+/**
+ * Get that height reduced by the vertical padding. Useful if a layout is used.
+ * @param cont pointer to a container object
+ * @return the height which still fits into the container
+ */
+lv_coord_t lv_cont_get_fit_height(lv_obj_t * cont)
+{
+    lv_style_t * style = lv_cont_get_style(cont);
+
+    return lv_obj_get_width(cont) - 2 * style->body.padding.hor;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
diff --git a/lv_objx/lv_cont.h b/lv_objx/lv_cont.h
index f1c37fac7..3259c772f 100644
--- a/lv_objx/lv_cont.h
+++ b/lv_objx/lv_cont.h
@@ -125,6 +125,21 @@ bool lv_cont_get_hor_fit(const lv_obj_t * cont);
  */
 bool lv_cont_get_ver_fit(const lv_obj_t * cont);
 
+
+/**
+ * Get that width reduced by the horizontal padding. Useful if a layout is used.
+ * @param cont pointer to a container object
+ * @return the width which still fits into the container
+ */
+lv_coord_t lv_cont_get_fit_width(lv_obj_t * cont);
+
+/**
+ * Get that height reduced by the vertical padding. Useful if a layout is used.
+ * @param cont pointer to a container object
+ * @return the height which still fits into the container
+ */
+lv_coord_t lv_cont_get_fit_height(lv_obj_t * cont);
+
 /**
  * Get the style of a container
  * @param cont pointer to a container object
diff --git a/lv_objx/lv_page.c b/lv_objx/lv_page.c
index ce27cae5c..9e19261d8 100644
--- a/lv_objx/lv_page.c
+++ b/lv_objx/lv_page.c
@@ -306,6 +306,32 @@ bool lv_page_get_arrow_scroll(const lv_obj_t * page)
     return ext->arrow_scroll ? true : false;
 }
 
+/**
+ * Get that width which can be set to the children to still not cause overflow (show scrollbars)
+ * @param page pointer to a page object
+ * @return the width which still fits into the page
+ */
+lv_coord_t lv_page_get_fit_width(lv_obj_t * page)
+{
+    lv_style_t * bg_style = lv_page_get_style(page, LV_PAGE_STYLE_BG);
+    lv_style_t * scrl_style = lv_page_get_style(page, LV_PAGE_STYLE_SCRL);
+
+    return lv_obj_get_width(page) - 2 * (bg_style->body.padding.hor + scrl_style->body.padding.hor);
+}
+
+/**
+ * Get that height which can be set to the children to still not cause overflow (show scrollbars)
+ * @param page pointer to a page object
+ * @return the height which still fits into the page
+ */
+lv_coord_t lv_page_get_fit_height(lv_obj_t * page)
+{
+    lv_style_t * bg_style = lv_page_get_style(page, LV_PAGE_STYLE_BG);
+    lv_style_t * scrl_style = lv_page_get_style(page, LV_PAGE_STYLE_SCRL);
+
+    return lv_obj_get_height(page) - 2 * (bg_style->body.padding.ver + scrl_style->body.padding.ver);
+}
+
 /**
  * Get a style of a page
  * @param page pointer to page object
diff --git a/lv_objx/lv_page.h b/lv_objx/lv_page.h
index 80f4fcb36..975452d09 100644
--- a/lv_objx/lv_page.h
+++ b/lv_objx/lv_page.h
@@ -217,6 +217,21 @@ lv_sb_mode_t lv_page_get_sb_mode(const lv_obj_t * page);
  */
 bool lv_page_get_arrow_scroll(const lv_obj_t * page);
 
+
+/**
+ * Get that width which can be set to the children to still not cause overflow (show scrollbars)
+ * @param page pointer to a page object
+ * @return the width which still fits into the page
+ */
+lv_coord_t lv_page_get_fit_width(lv_obj_t * page);
+
+/**
+ * Get that height which can be set to the children to still not cause overflow (show scrollbars)
+ * @param page pointer to a page object
+ * @return the height which still fits into the page
+ */
+lv_coord_t lv_page_get_fit_height(lv_obj_t * page);
+
 /**
  * Get width of the scrollable part of a page
  * @param page pointer to a page object