minor fixes

examples/widgets/bar/lv_example_bar_6.c

@@ -1,11 +1,11 @@
-//#include "../../../lvgl.h"
-//#if LV_USE_BAR && LV_BUILD_EXAMPLES
-//
+#include "../../../lvgl.h"
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
+
 //static void set_value(void *bar, int32_t v)
 //{
 //    lv_bar_set_value(bar, v, LV_ANIM_OFF);
 //}
-//
+
 //static void event_cb(lv_obj_t * obj, lv_event_t e)
 //{
 //    if(e == LV_EVENT_DRAW_POST_END) {
@@ -42,12 +42,12 @@
 //        lv_draw_label(&txt_area, clip_area, &dsc, buf, NULL);
 //    }
 //}
-//
-///**
-// * Custom drawer on bar to display the current value
-// */
-//void lv_example_bar_6(void)
-//{
+
+/**
+ * Custom drawer on bar to display the current value
+ */
+void lv_example_bar_6(void)
+{
 //    static lv_style_t style_bg;
 //    lv_style_init(&style_bg);
 //    lv_style_set_content_ofs_y(&style_bg, -3);
@@ -67,7 +67,7 @@
 //    lv_anim_set_playback_time(&a, 2000);
 //    lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
 //    lv_anim_start(&a);
-//
-//}
-//
-//#endif
+
+}
+
+#endif

examples/widgets/btn/lv_example_btn_1.c

@@ -33,5 +33,6 @@ void lv_example_btn_1(void)
     label = lv_label_create(btn2);
     lv_label_set_text(label, "Toggle");
     lv_obj_center(label);
+    lv_label_set_text(label, "Togglasdasasdasdase");
 }
 #endif

examples/widgets/slider/lv_example_slider_2.c

@@ -1,4 +1,4 @@
-//#include "../../../lvgl.h"
+#include "../../../lvgl.h"
 //#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
 //
 //static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
@@ -9,8 +9,8 @@
 ///**
 // * Show the current value when the slider if pressed using a fancy style transition.
 // */
-//void lv_example_slider_2(void)
-//{
+void lv_example_slider_2(void)
+{
 //    lv_style_init(&style_def);
 //    lv_style_set_content_opa(&style_def, LV_OPA_TRANSP);
 //    lv_style_set_content_align(&style_def, LV_ALIGN_OUT_TOP_MID);
@@ -27,7 +27,7 @@
 //
 //    lv_obj_add_style(slider, LV_PART_KNOB, LV_STATE_DEFAULT, &style_def);
 //    lv_obj_add_style(slider, LV_PART_KNOB, LV_STATE_PRESSED, &style_pr);
-//}
+}
 //
 //static void slider_event_cb(lv_obj_t * slider, lv_event_t event)
 //{

examples/widgets/slider/lv_example_slider_3.c

@@ -1,4 +1,4 @@
-//#include "../../../lvgl.h"
+#include "../../../lvgl.h"
 //#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
 //
 //static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
@@ -7,8 +7,8 @@
 // * Show the current value when the slider if pressed (using only styles).
 // *
 // */
-//void lv_example_slider_3(void)
-//{
+void lv_example_slider_3(void)
+{
 //    /*Create a slider in the center of the display*/
 //    lv_obj_t * slider;
 //    slider = lv_slider_create(lv_scr_act());
@@ -25,7 +25,7 @@
 //
 //    /*To update the value text*/
 //    lv_event_send(slider, LV_EVENT_VALUE_CHANGED, NULL);
-//}
+}
 //
 //static void slider_event_cb(lv_obj_t * slider, lv_event_t event)
 //{

src/core/lv_obj.c

@@ -22,6 +22,7 @@
 #include "../misc/lv_math.h"
 #include "../misc/lv_log.h"
 #include "../hal/lv_hal.h"
+#include "../extra/layouts/lv_layouts.h"
 #include <stdint.h>
 #include <string.h>
 
@@ -155,6 +156,9 @@ void lv_init(void)
     LV_LOG_WARN("Log level is set the Trace which makes LVGL much slower")
 #endif
 
+    lv_grid_init();
+    lv_flex_init();
+
     lv_initialized = true;
 
     LV_LOG_TRACE("finished");
@@ -585,6 +589,11 @@ bool lv_obj_has_class(const lv_obj_t * obj, const lv_obj_class_t * class_p)
     return false;
 }
 
+const lv_obj_class_t * lv_obj_get_class(const lv_obj_t * obj)
+{
+    return obj->class_p;
+}
+
 bool lv_obj_is_valid(const lv_obj_t * obj)
 {
     lv_disp_t * disp = lv_disp_get_next(NULL);

src/core/lv_obj.h

@@ -483,13 +483,21 @@ lv_obj_t * lv_obj_get_focused_obj(const lv_obj_t * obj);
 bool lv_obj_check_type(const lv_obj_t * obj, const lv_obj_class_t * class_p);
 
 /**
- * Check if any object has a given type
+ * Check if any object has a given class (type).
+ * It checks the ancestor classes too.
  * @param obj       pointer to an object
- * @param obj_type  type of the object. (e.g. "lv_btn")
- * @return          true: valid
+ * @param class_p   a class to check (e.g. `lv_slider_class`)
+ * @return          true: `obj` has the given class
  */
 bool lv_obj_has_class(const lv_obj_t * obj, const lv_obj_class_t * class_p);
 
+/**
+ * Get the class (type) of the object
+ * @param obj       pointer to an object
+ * @return the class (type) of the object
+ */
+const lv_obj_class_t * lv_obj_get_class(const lv_obj_t * obj);
+
 /**
  * Check if any object is still "alive", and part of the hierarchy
  * @param obj       pointer to an object

src/core/lv_obj_draw.c

@@ -165,21 +165,17 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
         if(draw_dsc->bg_img_src) {
             draw_dsc->bg_img_opa = lv_obj_get_style_bg_img_opa(obj, part);
             if(draw_dsc->bg_img_opa > LV_OPA_MIN) {
-                draw_dsc->bg_img_tiled = lv_obj_get_style_bg_img_tiled(obj, part);
+                if(lv_img_src_get_type(draw_dsc->bg_img_src) == LV_IMG_SRC_SYMBOL) {
+                   draw_dsc->bg_img_symbol_font= lv_obj_get_style_text_font(obj, part);
+                   draw_dsc->bg_img_recolor = lv_obj_get_style_text_color(obj, part);
+               } else {
+                   draw_dsc->bg_img_recolor = lv_obj_get_style_bg_img_recolor(obj, part);
+                   draw_dsc->bg_img_recolor_opa = lv_obj_get_style_bg_img_recolor_opa(obj, part);
+                   draw_dsc->bg_img_tiled = lv_obj_get_style_bg_img_tiled(obj, part);
+               }
             }
         }
     }
-
-    draw_dsc->content_text = lv_obj_get_style_content_text(obj, part);
-    if(draw_dsc->content_text) {
-        draw_dsc->content_ofs_y = lv_obj_get_style_content_ofs_y(obj, part);
-        draw_dsc->content_ofs_x = lv_obj_get_style_content_ofs_x(obj, part);
-        draw_dsc->content_align = lv_obj_get_style_content_align(obj, part);
-        draw_dsc->content_font = lv_obj_get_style_content_font(obj, part);
-        draw_dsc->content_color = lv_obj_get_style_content_color_filtered(obj, part);
-        draw_dsc->content_letter_space = lv_obj_get_style_content_letter_space(obj, part);
-        draw_dsc->content_line_space = lv_obj_get_style_content_line_space(obj, part);
-    }
 #endif
 }
 

src/extra/layouts/grid/lv_grid.h

@@ -65,6 +65,8 @@ extern lv_style_prop_t LV_STYLE_GRID_CELL_ROW_PLACE;
  * GLOBAL PROTOTYPES
  **********************/
 
+void lv_grid_init(void);
+
 void lv_obj_set_grid_template(lv_obj_t * obj, const lv_coord_t * col_templ, const lv_coord_t * row_templ);
 
 void lv_obj_set_grid_place(lv_obj_t * obj, lv_grid_place_t hor_place, lv_grid_place_t ver_place);

src/widgets/lv_dropdown.c

@@ -6,6 +6,7 @@
 /*********************
  *      INCLUDES
  *********************/
+#include <lvgl/src/core/lv_obj.h>
 #include "lv_dropdown.h"
 #if LV_USE_DROPDOWN != 0