add lv_page/cont_fit_width/height functions

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
  **********************/

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

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

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

lv_themes/lv_theme_material.c

@@ -718,7 +718,7 @@ static void win_init(void)
     lv_style_copy(&header, &def);
     header.body.main_color = LV_COLOR_HEX3(0xccc);
     header.body.grad_color = header.body.main_color;
-    header.body.radius = DEF_RADIUS;
+    header.body.radius = 0;
     header.body.border.width = 1;
     header.body.border.color = LV_COLOR_HEX3(0xbbb);
     header.body.border.part = LV_BORDER_BOTTOM;