minor fixes

examples/layouts/flex/lv_example_flex_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 /**
  * A simple row and a column layout with flexbox

examples/layouts/flex/lv_example_flex_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 /**
  * Arrange items in rows with wrap and place the items to get even space around them.

examples/layouts/flex/lv_example_flex_3.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 /**
  * Use a built in flex layout and demonstrate flex grow.

examples/layouts/flex/lv_example_flex_4.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 /**
  * Reverse the order of flex items

examples/layouts/flex/lv_example_flex_5.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 static void row_gap_anim(lv_obj_t * obj, lv_anim_value_t v)
 {

examples/layouts/flex/lv_example_flex_6.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_FLEX && LV_BUILD_EXAMPLES
-#if LV_USE_FLEX
 
 /**
  * RTL base direction changes order of the items.

examples/layouts/grid/lv_example_grid_1.c

@@ -1,7 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
-
 
 /**
  * A simple grid

examples/layouts/grid/lv_example_grid_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
 
 
 /**

examples/layouts/grid/lv_example_grid_3.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
 
 /**
  * Demonstrate grid's "free unit"

examples/layouts/grid/lv_example_grid_4.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
 
 /**
  * Demonstrate track placement

examples/layouts/grid/lv_example_grid_5.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
 
 static void row_gap_anim(lv_obj_t * obj, lv_anim_value_t v)
 {
@@ -12,7 +11,7 @@ static void column_gap_anim(lv_obj_t * obj, lv_anim_value_t v)
     lv_obj_set_style_pad_column(obj, LV_PART_MAIN, LV_STATE_DEFAULT, v);
 }
 /**
- * Demonstrate margin in grid
+ * Demonstrate column and row gap
  */
 void lv_example_grid_5(void)
 {

examples/layouts/grid/lv_example_grid_6.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_GRID && LV_BUILD_EXAMPLES
-#if LV_USE_GRID
 
 /**
  * Demonstrate RTL direction on grid

examples/widgets/arc/lv_example_arc_1.c

@@ -1,6 +1,6 @@
 #include "../../../lvgl.h"
 
-#if LV_USE_ARC
+#if LV_USE_ARC && LV_BUILD_EXAMPLES
 
 void lv_example_arc_1(void) 
 {

examples/widgets/arc/lv_example_arc_2.c

@@ -1,5 +1,6 @@
 #include "../../../lvgl.h" 
-#if LV_USE_ARC
+
+#if LV_USE_ARC && LV_BUILD_EXAMPLES
 
 /**
  * An `lv_task` to call periodically to set the angles of the arc

examples/widgets/bar/lv_example_bar_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 void lv_example_bar_1(void)
 {

examples/widgets/bar/lv_example_bar_2.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 /**
  * Example of styling the bar

examples/widgets/bar/lv_example_bar_3.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 static void set_temp(lv_obj_t * bar, int32_t temp)
 {

examples/widgets/bar/lv_example_bar_4.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 /**
  * Bar with stripe pattern and ranged value

examples/widgets/bar/lv_example_bar_5.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 /**
  * Bar with LTR and RTL base direction

examples/widgets/bar/lv_example_bar_6.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_BAR
+#if LV_USE_BAR && LV_BUILD_EXAMPLES
 
 static void event_cb(lv_obj_t * obj, lv_event_t e)
 {

examples/widgets/btn/lv_example_btn_1.c

@@ -1,14 +1,13 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_BTN && LV_BUILD_EXAMPLES
-#if LV_USE_BTN
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_CLICKED) {
-        printf("Clicked\n");
+        LV_LOG_USER("Clicked\n");
     }
     else if(event == LV_EVENT_VALUE_CHANGED) {
-        printf("Toggled\n");
+        LV_LOG_USER("Toggled\n");
     }
 }
 

examples/widgets/btnmatrix/lv_example_btnmatrix_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_BTNMATRIX && LV_BUILD_EXAMPLES
-#if LV_USE_BTNMATRIX
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
@@ -8,7 +7,7 @@ static void event_handler(lv_obj_t * obj, lv_event_t event)
         uint32_t id = lv_btnmatrix_get_active_btn(obj);
         const char * txt = lv_btnmatrix_get_btn_text(obj, id);
 
-        printf("%s was pressed\n", txt);
+        LV_LOG_USER("%s was pressed\n", txt);
     }
 }
 

examples/widgets/btnmatrix/lv_example_btnmatrix_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_BTNMATRIX && LV_BUILD_EXAMPLES
-#if LV_USE_BTNMATRIX
 
 
 void event_cb(lv_obj_t * obj, lv_event_t e)

examples/widgets/btnmatrix/lv_example_btnmatrix_3.c

@@ -1,7 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_BTNMATRIX  && LV_BUILD_EXAMPLES
-#if LV_USE_BTNMATRIX
-
 
 static void event_cb(lv_obj_t * obj, lv_event_t e)
 {

examples/widgets/calendar/lv_example_calendar_1.c

@@ -1,14 +1,12 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_CALENDAR && LV_BUILD_EXAMPLES
-
-#if LV_USE_CALENDAR
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
         lv_calendar_date_t date;
         if(lv_calendar_get_pressed_date(obj, &date)) {
-            printf("Clicked date: %02d.%02d.%d\n", date.day, date.month, date.year);
+            LV_LOG_USER("Clicked date: %02d.%02d.%d\n", date.day, date.month, date.year);
         }
     }
 }

examples/widgets/canvas/lv_example_canvas_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CANVAS
+#if LV_USE_CANVAS && LV_BUILD_EXAMPLES
 
 
 #define CANVAS_WIDTH  200

examples/widgets/canvas/lv_example_canvas_2.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CANVAS
+#if LV_USE_CANVAS && LV_BUILD_EXAMPLES
 
 #define CANVAS_WIDTH  50
 #define CANVAS_HEIGHT  50

examples/widgets/chart/lv_example_chart_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CHART
+#if LV_USE_CHART && LV_BUILD_EXAMPLES
 
 void lv_example_chart_1(void)
 {

examples/widgets/chart/lv_example_chart_2.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CHART
+#if LV_USE_CHART && LV_DRAW_COMPLEX && LV_BUILD_EXAMPLES
 
 static lv_obj_t * chart1;
 static lv_chart_series_t * ser1;

examples/widgets/chart/lv_example_chart_3.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CHART
+#if LV_USE_CHART && LV_BUILD_EXAMPLES
 
 static void event_cb(lv_obj_t * chart, lv_event_t e)
 {

examples/widgets/chart/lv_example_chart_4.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_CHART
+#if LV_USE_CHART && LV_BUILD_EXAMPLES
 
 
 static void event_cb(lv_obj_t * chart, lv_event_t e)
@@ -15,7 +15,7 @@ static void event_cb(lv_obj_t * chart, lv_event_t e)
         int32_t id = lv_chart_get_pressed_point(chart);
         if(id < 0) return;
 
-        printf("Selected point %d\n", id);
+        LV_LOG_USER("Selected point %d\n", id);
 
         lv_chart_series_t * ser = lv_chart_get_series_next(chart, NULL);
         while(ser) {

examples/widgets/checkbox/lv_example_checkbox_1.c

@@ -1,13 +1,12 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_CHECKBOX && LV_BUILD_EXAMPLES
-#if LV_USE_CHECKBOX
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
         const char * txt = lv_checkbox_get_text(obj);
         const char * state = lv_obj_get_state(obj) & LV_STATE_CHECKED ? "Checked" : "Unchecked";
-        printf("%s: %s\n", txt, state);
+        LV_LOG_USER("%s: %s\n", txt, state);
     }
 }
 

examples/widgets/colorwheel/lv_example_colorwheel_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_COLORWHEEL
+#if LV_USE_COLORWHEEL && LV_BUILD_EXAMPLES
 
 void lv_example_colorwheel_1(void)
 {

examples/widgets/dropdown/lv_example_dropdown_1.c

@@ -1,14 +1,12 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
-#if LV_USE_DROPDOWN
-
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
         char buf[32];
         lv_dropdown_get_selected_str(obj, buf, sizeof(buf));
-        printf("Option: %s\n", buf);
+        LV_LOG_USER("Option: %s\n", buf);
     }
 }
 

examples/widgets/dropdown/lv_example_dropdown_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
-#if LV_USE_DROPDOWN
 
 
 /**

examples/widgets/dropdown/lv_example_dropdown_3.c

@@ -1,7 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
-#if LV_USE_DROPDOWN
-
 
 /**
  * Create a menu from a drop-down list and show some drop-down list features and styling

examples/widgets/img/lv_example_img_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_IMG
+#if LV_USE_IMG && LV_BUILD_EXAMPLES
 
 /* Find the image here: https://github.com/lvgl/lv_examples/tree/master/assets */
 LV_IMG_DECLARE(img_cogwheel_argb);

examples/widgets/img/lv_example_img_2.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_IMG
+#if LV_USE_IMG && LV_BUILD_EXAMPLES
 
 static lv_obj_t * create_slider(lv_color_t color);
 static void slider_event_cb(lv_obj_t * slider, lv_event_t event);

examples/widgets/img/lv_example_img_3.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_IMG
+#if LV_USE_IMG && LV_BUILD_EXAMPLES
 
 LV_IMG_DECLARE(img_cogwheel_argb);
 

examples/widgets/img/lv_example_img_4.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_IMG
+#if LV_USE_IMG && LV_BUILD_EXAMPLES
 
 LV_IMG_DECLARE(img_skew_strip);
 

examples/widgets/imgbtn/lv_example_imgbtn_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-
+#if LV_USE_IMGBTN && LV_BUILD_EXAMPLES
-#if LV_USE_IMGBTN
 
 void lv_example_imgbtn_1(void)
 {

examples/widgets/keyboard/lv_example_keyboard_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_KEYBOARD
+#if LV_USE_KEYBOARD && LV_BUILD_EXAMPLES
-
 
 static void ta_event_cb(lv_obj_t * ta, lv_event_t e)
 {

examples/widgets/label/lv_example_label_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_LABEL
+#if LV_USE_LABEL && LV_BUILD_EXAMPLES
 
 /**
  * Show line wrap, re-color, line align and text scrolling.

examples/widgets/label/lv_example_label_2.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_LABEL
+#if LV_USE_LABEL && LV_BUILD_EXAMPLES
 
 /**
  * Create a fake text shadow

examples/widgets/led/lv_example_led_1.c

@@ -1,6 +1,9 @@
 #include "../../../lvgl.h"
-#if LV_USE_LED
+#if LV_USE_LED && LV_BUILD_EXAMPLES
 
+/**
+ * Create LED's with different brightness and color
+ */
 void lv_example_led_1(void)
 {
     /*Create a LED and switch it OFF*/
@@ -11,7 +14,8 @@ void lv_example_led_1(void)
     /*Copy the previous LED and set a brightness*/
     lv_obj_t * led2  = lv_led_create(lv_scr_act());
     lv_obj_align(led2, NULL, LV_ALIGN_CENTER, 0, 0);
-    lv_led_set_bright(led2, 150);
+    lv_led_set_brightness(led2, 150);
+    lv_led_set_color(led2, LV_COLOR_RED);
 
     /*Copy the previous LED and switch it ON*/
     lv_obj_t * led3  = lv_led_create(lv_scr_act());

examples/widgets/line/lv_example_line_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_LINE
+#if LV_USE_LINE && LV_BUILD_EXAMPLES
 
 void lv_example_line_1(void)
 {

examples/widgets/list/lv_example_list_1.c

@@ -1,11 +1,10 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_LIST && LV_BUILD_EXAMPLES
-#if LV_USE_LIST
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_CLICKED) {
-        printf("Clicked: %s\n", lv_list_get_btn_text(obj));
+        LV_LOG_USER("Clicked: %s\n", lv_list_get_btn_text(obj));
     }
 }
 void lv_list_example_1(void)

examples/widgets/meter/lv_example_meter_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_METER && LV_BUILD_EXAMPLES
-#if LV_USE_METER
 
 static lv_obj_t * meter;
 

examples/widgets/meter/lv_example_meter_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_METER && LV_BUILD_EXAMPLES
-#if LV_USE_METER
 
 static lv_obj_t * meter;
 

examples/widgets/meter/lv_example_meter_3.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_METER && LV_BUILD_EXAMPLES
-#if LV_USE_METER
 
 static lv_obj_t * meter;
 

examples/widgets/meter/lv_example_meter_4.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_METER && LV_BUILD_EXAMPLES
-#if LV_USE_METER
 
 /**
  * Create a pie chart

examples/widgets/msgbox/lv_example_msgbox_1.c

@@ -1,11 +1,10 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_MSGBOX && LV_BUILD_EXAMPLES
-#if LV_USE_MSGBOX
 
 static void event_cb(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
-        printf("Button: %s\n", lv_msgbox_get_active_btn_text(obj));
+        LV_LOG_USER("Button: %s\n", lv_msgbox_get_active_btn_text(obj));
     }
 }
 

examples/widgets/msgbox/lv_example_msgbox_2.c

@@ -1,94 +0,0 @@
-//#include "../../../lvgl.h"
-//#if LV_USE_MSGBOX
-//
-//static void mbox_event_cb(lv_obj_t *obj, lv_event_t evt);
-//static void btn_event_cb(lv_obj_t *btn, lv_event_t evt);
-//static void opa_anim(void * bg, lv_anim_value_t v);
-//
-//static lv_obj_t *mbox, *info;
-//static lv_style_t style_modal;
-//
-//static const char welcome_info[] = "Welcome to the modal message box demo!\n"
-//        "Press the button to display a message box.";
-//
-//static const char in_msg_info[] = "Notice that you cannot touch "
-//        "the button again while the message box is open.";
-//
-//void lv_example_msgbox_2(void)
-//{
-//    lv_style_init(&style_modal);
-//    lv_style_set_bg_color(&style_modal, LV_STATE_DEFAULT, LV_COLOR_BLACK);
-//
-//    /* Create a button, then set its position and event callback */
-//    lv_obj_t *btn = lv_btn_create(lv_scr_act(), NULL);
-//    lv_obj_set_size(btn, 200, 60);
-//    lv_obj_set_event_cb(btn, btn_event_cb);
-//    lv_obj_align(btn, NULL, LV_ALIGN_IN_TOP_LEFT, 20, 20);
-//
-//    /* Create a label on the button */
-//    lv_obj_t *label = lv_label_create(btn, NULL);
-//    lv_label_set_text(label, "Display a message box!");
-//
-//    /* Create an informative label on the screen */
-//    info = lv_label_create(lv_scr_act(), NULL);
-//    lv_label_set_text(info, welcome_info);
-//    lv_label_set_long_mode(info, LV_LABEL_LONG_BREAK); /* Make sure text will wrap */
-//    lv_obj_set_width(info, LV_HOR_RES - 10);
-//    lv_obj_align(info, NULL, LV_ALIGN_IN_BOTTOM_LEFT, 5, -5);
-//
-//}
-//
-//static void mbox_event_cb(lv_obj_t *obj, lv_event_t evt)
-//{
-//    if(evt == LV_EVENT_DELETE && obj == mbox) {
-//        /* Delete the parent modal background */
-//        lv_obj_del_async(lv_obj_get_parent(mbox));
-//        mbox = NULL; /* happens before object is actually deleted! */
-//        lv_label_set_text(info, welcome_info);
-//    } else if(evt == LV_EVENT_VALUE_CHANGED) {
-//        /* A button was clicked */
-//        lv_msgbox_start_auto_close(mbox, 0);
-//    }
-//}
-//
-//static void btn_event_cb(lv_obj_t *btn, lv_event_t evt)
-//{
-//    if(evt == LV_EVENT_CLICKED) {
-//        /* Create a full-screen background */
-//
-//        /* Create a base object for the modal background */
-//        lv_obj_t *obj = lv_obj_create(lv_scr_act(), NULL);
-//        lv_obj_reset_style_list(obj, LV_OBJ_PART_MAIN);
-//        lv_obj_add_style(obj, LV_OBJ_PART_MAIN, &style_modal);
-//        lv_obj_set_pos(obj, 0, 0);
-//        lv_obj_set_size(obj, LV_HOR_RES, LV_VER_RES);
-//
-//        static const char * btns2[] = {"Ok", "Cancel", ""};
-//
-//        /* Create the message box as a child of the modal background */
-//        mbox = lv_msgbox_create(obj, NULL);
-//        lv_msgbox_add_btns(mbox, btns2);
-//        lv_msgbox_set_text(mbox, "Hello world!");
-//        lv_obj_align(mbox, NULL, LV_ALIGN_CENTER, 0, 0);
-//        lv_obj_set_event_cb(mbox, mbox_event_cb);
-//
-//        /* Fade the message box in with an animation */
-//        lv_anim_t a;
-//        lv_anim_init(&a);
-//        lv_anim_set_var(&a, obj);
-//        lv_anim_set_time(&a, 500);
-//        lv_anim_set_values(&a, LV_OPA_TRANSP, LV_OPA_50);
-//        lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)opa_anim);
-//        lv_anim_start(&a);
-//
-//        lv_label_set_text(info, in_msg_info);
-//        lv_obj_align(info, NULL, LV_ALIGN_IN_BOTTOM_LEFT, 5, -5);
-//    }
-//}
-//
-//static void opa_anim(void * bg, lv_anim_value_t v)
-//{
-//    lv_obj_set_style_local_bg_opa(bg, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT, v);
-//}
-//
-//#endif

examples/widgets/obj/lv_example_obj_1.c

@@ -1,21 +1,22 @@
-//#include "../../../lvgl.h"
+#include "../../../lvgl.h"
-//
+#if LV_BUILD_EXAMPLES
-//void lv_example_obj_1(void)
+
-//{
+void lv_example_obj_1(void)
-//    lv_obj_t * obj1;
+{
-//    obj1 = lv_obj_create(lv_scr_act(), NULL);
+    lv_obj_t * obj1;
-//    lv_obj_set_size(obj1, 100, 50);
+    obj1 = lv_obj_create(lv_scr_act(), NULL);
-//    lv_obj_align(obj1, NULL, LV_ALIGN_CENTER, -60, -30);
+    lv_obj_set_size(obj1, 100, 50);
-//
+    lv_obj_align(obj1, NULL, LV_ALIGN_CENTER, -60, -30);
-//    static lv_style_t style_shadow;
+
-//    lv_style_init(&style_shadow);
+    static lv_style_t style_shadow;
-//    lv_style_set_shadow_width(&style_shadow, LV_STATE_DEFAULT, 10);
+    lv_style_init(&style_shadow);
-//    lv_style_set_shadow_spread(&style_shadow, LV_STATE_DEFAULT, 5);
+    lv_style_set_shadow_width(&style_shadow, 10);
-//    lv_style_set_shadow_color(&style_shadow, LV_STATE_DEFAULT, LV_COLOR_BLUE);
+    lv_style_set_shadow_spread(&style_shadow, 5);
-//
+    lv_style_set_shadow_color(&style_shadow, LV_COLOR_BLUE);
-//    /*Copy the previous object (drag is already enabled)*/
+
-//    lv_obj_t * obj3;
+    lv_obj_t * obj3;
-//    obj3 = lv_obj_create(lv_scr_act(), NULL);
+    obj3 = lv_obj_create(lv_scr_act(), NULL);
-//    lv_obj_add_style(obj3, LV_OBJ_PART_MAIN, &style_shadow);
+    lv_obj_add_style(obj3, LV_PART_MAIN, LV_STATE_DEFAULT, &style_shadow);
-//    lv_obj_align(obj3, NULL, LV_ALIGN_CENTER, 60, 30);
+    lv_obj_align(obj3, NULL, LV_ALIGN_CENTER, 60, 30);
-//}
+}
+#endif

examples/widgets/roller/lv_example_roller_1.c

@@ -1,13 +1,12 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_ROLLER && LV_BUILD_EXAMPLES
-#if LV_USE_ROLLER
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
         char buf[32];
         lv_roller_get_selected_str(obj, buf, sizeof(buf));
-        printf("Selected month: %s\n", buf);
+        LV_LOG_USER("Selected month: %s\n", buf);
     }
 }
 

examples/widgets/roller/lv_roller_example_2.c

@@ -1,13 +1,12 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_ROLLER && LV_BUILD_EXAMPLES
-#if LV_USE_ROLLER
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
         char buf[32];
         lv_roller_get_selected_str(obj, buf, sizeof(buf));
-        printf("Selected value: %s\n", buf);
+        LV_LOG_USER("Selected value: %s\n", buf);
     }
 }
 

examples/widgets/slider/lv_example_slider_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
-#if LV_USE_SLIDER
 
 static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
 static lv_obj_t * slider_label;

examples/widgets/slider/lv_example_slider_2.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
-#if LV_USE_SLIDER
 
 static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
 

examples/widgets/slider/lv_example_slider_3.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
-#if LV_USE_SLIDER
 
 static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
 

examples/widgets/spinbox/lv_example_spinbox_1.c

@@ -1,6 +1,5 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_SPINBOX && LV_BUILD_EXAMPLES
-#if LV_USE_SPINBOX
 
 static lv_obj_t * spinbox;
 

examples/widgets/spinner/lv_example_spinner_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_SPINNER
+#if LV_USE_SPINNER && LV_BUILD_EXAMPLES
 
 void lv_example_spinner_1(void)
 {

examples/widgets/switch/lv_example_switch_1.c

@@ -1,11 +1,10 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_SWITCH && LV_BUILD_EXAMPLES
-#if LV_USE_SWITCH
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
-        printf("State: %s\n", lv_obj_has_state(obj, LV_STATE_CHECKED) ? "On" : "Off");
+        LV_LOG_USER("State: %s\n", lv_obj_has_state(obj, LV_STATE_CHECKED) ? "On" : "Off");
     }
 }
 

examples/widgets/table/lv_example_table_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_TABLE
+#if LV_USE_TABLE && LV_BUILD_EXAMPLES
 
 static void event_cb(lv_obj_t * obj, lv_event_t e)
 {

examples/widgets/tabview/lv_example_tabview_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_TABVIEW
+#if LV_USE_TABVIEW && LV_BUILD_EXAMPLES
 
 void lv_example_tabview_1(void)
 {

examples/widgets/textarea/lv_example_textarea_1.c

@@ -1,32 +1,38 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_TEXTAREA && LV_BUILD_EXAMPLES
-#if LV_USE_TEXTAREA
 
-lv_obj_t * ta1;
-lv_obj_t * ta2;
 
-static void event_handler(lv_obj_t * obj, lv_event_t event)
+static void btnm_event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_VALUE_CHANGED) {
-        printf("Value: %s\n", lv_textarea_get_text(obj));
+        lv_obj_t * ta = lv_event_get_user_data();
-    }
+        const char * txt = lv_btnmatrix_get_btn_text(obj, lv_btnmatrix_get_active_btn(obj));
-    else if(event == LV_EVENT_LONG_PRESSED_REPEAT) {
+
-        /*For simple test: Long press the Text are to add the text below*/
+        if(strcmp(txt, LV_SYMBOL_BACKSPACE) == 0) lv_textarea_del_char(ta);
-        const char  * txt = "\n\nYou can scroll it if the text is long enough.\n";
+        else if(strcmp(txt, LV_SYMBOL_NEW_LINE) == 0) lv_textarea_add_char(ta, '\n');
-        static uint16_t i = 0;
+        else lv_textarea_add_text(ta, txt);
-        if(txt[i] != '\0') {
+
-            lv_textarea_add_char(ta1, txt[i]);
-            i++;
-        }
     }
 }
 
 void lv_example_textarea_1(void)
 {
-    ta1 = lv_textarea_create(lv_scr_act(), NULL);
+    lv_obj_t * ta = lv_textarea_create(lv_scr_act(), NULL);
-    lv_obj_align(ta1, NULL, LV_ALIGN_IN_TOP_LEFT, 0, 0);
+    lv_textarea_set_one_line(ta, true);
-    lv_textarea_set_text(ta1, "A text in a Text Area");    /*Set an initial text*/
+    lv_obj_align(ta, NULL, LV_ALIGN_IN_TOP_MID, 0, 10);
-    lv_obj_add_event_cb(ta1, event_handler, NULL);
+    lv_obj_add_state(ta, LV_STATE_FOCUSED); /*To be sure the cursor is visible*/
+
+    static const char * btnm_map[] = {"1", "2", "3", "\n",
+                               "4", "5", "6", "\n",
+                               "7", "8", "9", "\n",
+                               LV_SYMBOL_BACKSPACE, "0", LV_SYMBOL_NEW_LINE};
+
+    lv_obj_t * btnm = lv_btnmatrix_create(lv_scr_act(), NULL);
+    lv_obj_set_size(btnm, 200, 150);
+    lv_obj_align(btnm, NULL, LV_ALIGN_IN_BOTTOM_MID, 0, -10);
+    lv_obj_add_event_cb(btnm, btnm_event_handler, ta);
+    lv_obj_clear_flag(btnm, LV_OBJ_FLAG_CLICK_FOCUSABLE); /*To keep the text area focused on button clicks*/
+    lv_btnmatrix_set_map(btnm, btnm_map);
 }
 
 #endif

examples/widgets/textarea/lv_example_textarea_2.c

@@ -1,62 +1,58 @@
-//#include "../../../lvgl.h"
+#include "../../../lvgl.h"
-//#include <stdio.h>
+#if LV_USE_TEXTAREA && LV_USE_KEYBOARD && LV_BUILD_EXAMPLES
-//#if LV_USE_TEXTAREA && LV_USE_KEYBOARD
+
-//
+static void ta_event_cb(lv_obj_t * ta, lv_event_t event);
-//static void ta_event_cb(lv_obj_t * ta, lv_event_t event);
+
-//
+static lv_obj_t * kb;
-//static lv_obj_t * kb;
+
-//
+void lv_example_textarea_2(void)
-//void lv_example_textarea_2(void)
+{
-//{
+    /* Create the password box */
-//    /* Create the password box */
+    lv_obj_t * pwd_ta = lv_textarea_create(lv_scr_act(), NULL);
-//    lv_obj_t * pwd_ta = lv_textarea_create(lv_scr_act(), NULL);
+    lv_textarea_set_text(pwd_ta, "");
-//    lv_textarea_set_text(pwd_ta, "");
+    lv_textarea_set_pwd_mode(pwd_ta, true);
-//    lv_textarea_set_pwd_mode(pwd_ta, true);
+    lv_textarea_set_one_line(pwd_ta, true);
-//    lv_textarea_set_one_line(pwd_ta, true);
+    lv_obj_set_width(pwd_ta, LV_HOR_RES / 2 - 20);
-//    lv_textarea_set_cursor_hidden(pwd_ta, true);
+    lv_obj_set_pos(pwd_ta, 5, 20);
-//    lv_obj_set_width(pwd_ta, LV_HOR_RES / 2 - 20);
+    lv_obj_add_event_cb(pwd_ta, ta_event_cb, NULL);
-//    lv_obj_set_pos(pwd_ta, 5, 20);
+
-//    lv_obj_set_event_cb(pwd_ta, ta_event_cb);
+    /* Create a label and position it above the text box */
-//
+    lv_obj_t * pwd_label = lv_label_create(lv_scr_act(), NULL);
-//    /* Create a label and position it above the text box */
+    lv_label_set_text(pwd_label, "Password:");
-//    lv_obj_t * pwd_label = lv_label_create(lv_scr_act(), NULL);
+    lv_obj_align(pwd_label, pwd_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);
-//    lv_label_set_text(pwd_label, "Password:");
+
-//    lv_obj_align(pwd_label, pwd_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);
+    /* Create the one-line mode text area */
-//
+    lv_obj_t * oneline_ta = lv_textarea_create(lv_scr_act(), pwd_ta);
-//    /* Create the one-line mode text area */
+    lv_textarea_set_pwd_mode(oneline_ta, false);
-//    lv_obj_t * oneline_ta = lv_textarea_create(lv_scr_act(), pwd_ta);
+    lv_obj_align(oneline_ta, NULL, LV_ALIGN_IN_TOP_RIGHT, -5, 20);
-//    lv_textarea_set_pwd_mode(oneline_ta, false);
+
-//    lv_textarea_set_cursor_hidden(oneline_ta, true);
+
-//    lv_obj_align(oneline_ta, NULL, LV_ALIGN_IN_TOP_RIGHT, -5, 20);
+    /* Create a label and position it above the text box */
-//
+    lv_obj_t * oneline_label = lv_label_create(lv_scr_act(), NULL);
-//
+    lv_label_set_text(oneline_label, "Text:");
-//    /* Create a label and position it above the text box */
+    lv_obj_align(oneline_label, oneline_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);
-//    lv_obj_t * oneline_label = lv_label_create(lv_scr_act(), NULL);
+
-//    lv_label_set_text(oneline_label, "Text:");
+    /* Create a keyboard */
-//    lv_obj_align(oneline_label, oneline_ta, LV_ALIGN_OUT_TOP_LEFT, 0, 0);
+    kb = lv_keyboard_create(lv_scr_act());
-//
+    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);
-//    /* Create a keyboard */
+
-//    kb = lv_keyboard_create(lv_scr_act(), NULL);
+    lv_keyboard_set_textarea(kb, pwd_ta); /* Focus it on one of the text areas to start */
-//    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);
+}
-//
+
-//    lv_keyboard_set_textarea(kb, pwd_ta); /* Focus it on one of the text areas to start */
+static void ta_event_cb(lv_obj_t * ta, lv_event_t event)
-//    lv_keyboard_set_cursor_manage(kb, true); /* Automatically show/hide cursors on text areas */
+{
-//}
+    if(event == LV_EVENT_CLICKED) {
-//
+        /* Focus on the clicked text area */
-//static void ta_event_cb(lv_obj_t * ta, lv_event_t event)
+        if(kb != NULL)
-//{
+            lv_keyboard_set_textarea(kb, ta);
-//    if(event == LV_EVENT_CLICKED) {
+    }
-//        /* Focus on the clicked text area */
+
-//        if(kb != NULL)
+    else if(event == LV_EVENT_INSERT) {
-//            lv_keyboard_set_textarea(kb, ta);
+        const char * str = lv_event_get_param();
-//    }
+        if(str[0] == '\n') {
-//
+            LV_LOG_USER("Ready\n");
-//    else if(event == LV_EVENT_INSERT) {
+        }
-//        const char * str = lv_event_get_data();
+    }
-//        if(str[0] == '\n') {
+}
-//            printf("Ready\n");
+
-//        }
+#endif
-//    }
-//}
-//
-//#endif

examples/widgets/textarea/lv_example_textarea_3.c

@@ -1,44 +1,43 @@
-//#include "../../../lvgl.h"
+#include "../../../lvgl.h"
-//#include <stdio.h>
+#if LV_USE_TEXTAREA && LV_USE_KEYBOARD && LV_BUILD_EXAMPLES
-//#if LV_USE_TEXTAREA && LV_USE_KEYBOARD
+
-//
+static void ta_event_cb(lv_obj_t * ta, lv_event_t event);
-//static void ta_event_cb(lv_obj_t * ta, lv_event_t event);
+
-//
+static lv_obj_t * kb;
-//static lv_obj_t * kb;
+
-//
+/**
-///**
+ * Automatically format text like a clock. E.g. "12:34"
-// * Automatically format text like a clock. E.g. "12:34"
+ * Add the ':' automatically.
-// * Add the ':' automatically.
+ */
-// */
+void lv_example_textarea_3(void)
-//void lv_example_textarea_3(void)
+{
-//{
+    /* Create the text area */
-//    /* Create the text area */
+    lv_obj_t * ta = lv_textarea_create(lv_scr_act(), NULL);
-//    lv_obj_t * ta = lv_textarea_create(lv_scr_act(), NULL);
+    lv_obj_add_event_cb(ta, ta_event_cb, NULL);
-//    lv_obj_set_event_cb(ta, ta_event_cb);
+    lv_textarea_set_accepted_chars(ta, "0123456789:");
-//    lv_textarea_set_accepted_chars(ta, "0123456789:");
+    lv_textarea_set_max_length(ta, 5);
-//    lv_textarea_set_max_length(ta, 5);
+    lv_textarea_set_one_line(ta, true);
-//    lv_textarea_set_one_line(ta, true);
+    lv_textarea_set_text(ta, "");
-//    lv_textarea_set_text(ta, "");
+
-//
+    /* Create a keyboard*/
-//    /* Create a keyboard*/
+    kb = lv_keyboard_create(lv_scr_act());
-//    kb = lv_keyboard_create(lv_scr_act(), NULL);
+    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);
-//    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);
+    lv_keyboard_set_mode(kb, LV_KEYBOARD_MODE_NUMBER);
-//    lv_keyboard_set_mode(kb, LV_KEYBOARD_MODE_NUM);
+    lv_keyboard_set_textarea(kb, ta);
-//    lv_keyboard_set_textarea(kb, ta);
+}
-//}
+
-//
+static void ta_event_cb(lv_obj_t * ta, lv_event_t event)
-//static void ta_event_cb(lv_obj_t * ta, lv_event_t event)
+{
-//{
+    if(event == LV_EVENT_VALUE_CHANGED) {
-//    if(event == LV_EVENT_VALUE_CHANGED) {
+        const char * txt = lv_textarea_get_text(ta);
-//        const char * txt = lv_textarea_get_text(ta);
+        if(txt[0] >= '0' && txt[0] <= '9' &&
-//        if(txt[0] >= '0' && txt[0] <= '9' &&
+            txt[1] >= '0' && txt[1] <= '9' &&
-//            txt[1] >= '0' && txt[1] <= '9' &&
+            txt[2] != ':')
-//            txt[2] != ':')
+        {
-//        {
+            lv_textarea_set_cursor_pos(ta, 2);
-//            lv_textarea_set_cursor_pos(ta, 2);
+            lv_textarea_add_char(ta, ':');
-//            lv_textarea_add_char(ta, ':');
+        }
-//        }
+    }
-//    }
+}
-//}
+
-//
+#endif
-//#endif

examples/widgets/tileview/lv_example_tileview_1.c

@@ -1,5 +1,5 @@
 #include "../../../lvgl.h"
-#if LV_USE_TILEVIEW
+#if LV_USE_TILEVIEW && LV_BUILD_EXAMPLES
 
 /**
  * Create a 2x2 tile view and allow scrolling only in an "L" shape.

examples/widgets/win/lv_example_win_1.c

@@ -1,12 +1,11 @@
 #include "../../../lvgl.h"
-#include <stdio.h>
+#if LV_USE_WIN && LV_BUILD_EXAMPLES
-#if LV_USE_WIN
 
 
 static void event_handler(lv_obj_t * obj, lv_event_t event)
 {
     if(event == LV_EVENT_CLICKED) {
-        printf("Button: %d\n", lv_obj_get_child_id(obj));
+        LV_LOG_USER("Button: %d\n", lv_obj_get_child_id(obj));
     }
 }
 

lv_conf_template.h

@@ -15,6 +15,7 @@
 
 #include <stdint.h>
 
+
 /*====================
    COLOR SETTINGS
  *====================*/
@@ -102,12 +103,38 @@
  * 0: to disable caching */
 #define LV_IMG_CACHE_DEF_SIZE       0
 
+/*-------------
+ * GPU
+ *-----------*/
+
+/*Use STM32's DMA2D (aka Chrom Art) GPU*/
+#define LV_USE_GPU_STM32_DMA2D  0
+#if LV_USE_GPU_STM32_DMA2D
+/*Must be defined to include path of CMSIS header of target processor
+e.g. "stm32f769xx.h" or "stm32f429xx.h" */
+#define LV_GPU_DMA2D_CMSIS_INCLUDE
+#endif
+
+/* Use NXP's PXP GPU iMX RTxxx platforms */
+#define LV_USE_GPU_NXP_PXP      0
+#if LV_USE_GPU_NXP_PXP
+/*1: Add default bare metal and FreeRTOS interrupt handling routines for PXP (lv_gpu_nxp_pxp_osa.c)
+ *   and call lv_gpu_nxp_pxp_init() automatically during lv_init(). Note that symbol FSL_RTOS_FREE_RTOS
+ *   has to be defined in order to use FreeRTOS OSA, otherwise bare-metal implementation is selected.
+ *0: lv_gpu_nxp_pxp_init() has to be called manually before lv_init()
+ * */
+#define LV_USE_GPU_NXP_PXP_AUTO_INIT 0
+#endif
+
+/* Use NXP's VG-Lite GPU iMX RTxxx platforms */
+#define LV_USE_GPU_NXP_VG_LITE   0
+
 /*-------------
  * Logging
  *-----------*/
 
 /*Enable the log module*/
-#define LV_USE_LOG      0
+#define LV_USE_LOG      1
 #if LV_USE_LOG
 
 /* How important log should be added:
@@ -120,7 +147,7 @@
 
 /* 1: Print the log with 'printf';
  * 0: User need to register a callback with `lv_log_register_print_cb()`*/
-#  define LV_LOG_PRINTF   0
+#  define LV_LOG_PRINTF   1
 #endif  /*LV_USE_LOG*/
 
 /*-------------
@@ -129,25 +156,23 @@
 
 /* Enable asserts if an operation is failed or an invalid data is found.
  * If LV_USE_LOG is enabled an error message will be printed on failure*/
-#define LV_USE_ASSERT        1
-#if LV_USE_ASSERT
-
 #define LV_USE_ASSERT_NULL          1   /*Check if the parameter is NULL. (Very fast, recommended) */
 #define LV_USE_ASSERT_MALLOC        1   /*Checks is the memory is successfully allocated or no. (Very fast, recommended)*/
-#define LV_USE_ASSERT_STYLE         0   /*Check if the styles are properly initialized. (Very fast, recommended)*/
+#define LV_USE_ASSERT_STYLE         1   /*Check if the styles are properly initialized. (Very fast, recommended)*/
-#define LV_USE_ASSERT_MEM_INTEGRITY 0   /*Check the integrity of `lv_mem` after critical operations. (Slow)*/
+#define LV_USE_ASSERT_MEM_INTEGRITY 1   /*Check the integrity of `lv_mem` after critical operations. (Slow)*/
-#define LV_USE_ASSERT_OBJ           0   /*Check the object's type and existence (e.g. not deleted). (Slow) */
+#define LV_USE_ASSERT_OBJ           1   /*Check the object's type and existence (e.g. not deleted). (Slow) */
 
 /*Add a custom handler when assert happens e.g. to restart the MCU*/
 #define LV_ASSERT_HANDLER_INCLUDE
 #define LV_ASSERT_HANDLER   while(1);   /*Halt by default*/
 
-#endif /*LV_USE_ASSERT*/
-
 /*-------------
  * Others
  *-----------*/
 
+/*1: Show CPU usage and FPS count in the right bottom corner*/
+#define LV_USE_PERF_MONITOR     0
+
 /*Change the built in (v)snprintf functions*/
 #define LV_SPRINTF_CUSTOM   0
 #if LV_SPRINTF_CUSTOM
@@ -258,19 +283,16 @@ typedef void * lv_user_data_t;
  * E.g. #define LV_FONT_CUSTOM_DECLARE   LV_FONT_DECLARE(my_font_1) LV_FONT_DECLARE(my_font_2) */
 #define LV_FONT_CUSTOM_DECLARE
 
-/*Always set a default font*/
-#define LV_FONT_DEFAULT     &lv_font_montserrat_14
-
 /* Enable handling large font and/or fonts with a lot of characters.
  * The limit depends on the font size, font face and bpp.
  * Compiler error will be triggered if a font needs it.*/
 #define LV_FONT_FMT_TXT_LARGE   0
 
 /* Enables/disables support for compressed fonts. */
-#define LV_USE_FONT_COMPRESSED 1
+#define LV_USE_FONT_COMPRESSED  0
 
 /* Enable subpixel rendering */
-#define LV_USE_FONT_SUBPX 1
+#define LV_USE_FONT_SUBPX       0
 #if LV_USE_FONT_SUBPX
 /* Set the pixel order of the display. Physical order of RGB channels. Doesn't matter with "normal" fonts.*/
 #define LV_FONT_SUBPX_BGR       0  /*0: RGB; 1:BGR order*/
@@ -308,7 +330,7 @@ typedef void * lv_user_data_t;
 /* Support bidirectional texts. Allows mixing Left-to-Right and Right-to-Left texts.
  * The direction will be processed according to the Unicode Bidirectioanl Algorithm:
  * https://www.w3.org/International/articles/inline-bidi-markup/uba-basics*/
-#define LV_USE_BIDI     1
+#define LV_USE_BIDI         0
 #if LV_USE_BIDI
 /* Set the default direction. Supported values:
  * `LV_BIDI_DIR_LTR` Left-to-Right
@@ -322,6 +344,24 @@ typedef void * lv_user_data_t;
 #define LV_USE_ARABIC_PERSIAN_CHARS 0
 
 
+/*==================
+ *  THEME USAGE
+ *================*/
+/*Set the very basic the attributes*/
+#define LV_THEME_COLOR_PRIMARY      lv_color_hex(0x01a2b1)
+#define LV_THEME_COLOR_SECONDARY    lv_color_hex(0x44d1b6)
+#define LV_THEME_FONT_SMALL         &lv_font_montserrat_14
+#define LV_THEME_FONT_NORMAL        &lv_font_montserrat_14
+#define LV_THEME_FONT_LARGE         &lv_font_montserrat_14
+#define LV_THEME_FONT_EXTRA_LARGE   &lv_font_montserrat_14
+
+/* An external include file required to see the theme init function.
+ * Relative to "lv_core/lv_obj" */
+#define LV_THEME_INIT_INCLUDE "../extra/themes/lv_themes.h"
+
+/* Set a theme initialization function */
+#define LV_THEME_INIT lv_theme_default_init
+
 /*==================
  *  WIDGET USAGE
  *================*/
@@ -379,33 +419,45 @@ typedef void * lv_user_data_t;
 /*-----------
  * Widgets
  *----------*/
-#define LV_USE_CALENDAR     0
+#define LV_USE_CALENDAR     1
-#define LV_USE_CALENDAR_HEADER_ARROW 0
+#if LV_USE_CALENDAR
+# define LV_CALENDAR_WEEK_STARTS_MONDAY 0
+# if LV_CALENDAR_WEEK_STARTS_MONDAY
+#  define LV_CALENDAR_DEFAULT_DAY_NAMES {"Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"}
+# else
+#  define LV_CALENDAR_DEFAULT_DAY_NAMES {"Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"}
+# endif
 
-#define LV_USE_COLORWHEEL   0
+# define LV_CALENDAR_DEFAULT_MONTH_NAMES {"January", "February", "March",  "April", "May",  "June", "July", "August", "September", "October", "November", "December"}
+# define LV_USE_CALENDAR_HEADER_ARROW 1
+#endif  /*LV_USE_CALENDAR*/
 
-#define LV_USE_KEYBOARD     0
+#define LV_USE_COLORWHEEL   1
 
-#define LV_USE_LED          0
+#define LV_USE_IMGBTN       1
 
-#define LV_USE_LIST         0
+#define LV_USE_KEYBOARD     1
 
-#define LV_USE_MSGBOX       0
+#define LV_USE_LED          1
 
-#define LV_USE_SPINBOX      0
+#define LV_USE_LIST         1
 
-#define LV_USE_SPINNER      0
+#define LV_USE_MSGBOX       1
 
-#define LV_USE_TABVIEW      0
+#define LV_USE_SPINBOX      1
 
-#define LV_USE_TILEVIEW     0
+#define LV_USE_SPINNER      1
 
-#define LV_USE_WIN          0
+#define LV_USE_TABVIEW      1
+
+#define LV_USE_TILEVIEW     1
+
+#define LV_USE_WIN          1
 
 /*-----------
  * Themes
  *----------*/
-/* Use the default theme. If not used a custom theme needs be assigned to the display.*/
+/* A simple, impressive and very complete theme */
 #define LV_USE_THEME_DEFAULT    1
 #if LV_USE_THEME_DEFAULT
 /* 1: Light mode; 0: Dark mode*/
@@ -428,14 +480,6 @@ typedef void * lv_user_data_t;
 /*Enable the examples to be built with the library*/
 #define LV_BUILD_EXAMPLES   1
 
-/*==================
- * Non-user section
- *==================*/
-
-#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)    /* Disable warnings for Visual Studio*/
-#  define _CRT_SECURE_NO_WARNINGS
-#endif
-
 /*--END OF LV_CONF_H--*/
 
 #endif /*LV_CONF_H*/

lvgl.mk

@@ -3,6 +3,6 @@ include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_hal/lv_hal.mk
 include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_widgets/lv_widgets.mk
 include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_font/lv_font.mk
 include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_misc/lv_misc.mk
-include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_themes/lv_themes.mk
 include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_draw/lv_draw.mk
 include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_gpu/lv_gpu.mk
+include $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/extra/extra.mk

scripts/lv_conf_checker.py

@@ -114,35 +114,17 @@ fout.write(
 /*If running without lv_conf.h add typdesf with default value*/
 #if defined(LV_CONF_SKIP)
 
-  /* Type of coordinates. Should be `int16_t` (or `int32_t` for extreme cases) */
-  typedef int16_t lv_coord_t;
-
-#  if LV_USE_ANIMATION
-  /*Declare the type of the user data of animations (can be e.g. `void *`, `int`, `struct`)*/
-  typedef void * lv_anim_user_data_t;
-#  endif
-
-#  if LV_USE_GROUP
-  typedef void * lv_group_user_data_t;
-#  endif
-
-#  if LV_USE_FILESYSTEM
-  typedef void * lv_fs_drv_user_data_t;
-#  endif
-
-  typedef void * lv_img_decoder_user_data_t;
-
-  typedef void * lv_disp_drv_user_data_t;             /*Type of user data in the display driver*/
-  typedef void * lv_indev_drv_user_data_t;            /*Type of user data in the input device driver*/
-
-  typedef void * lv_font_user_data_t;
 
 # if LV_USE_USER_DATA
   typedef void * lv_obj_user_data_t;
 # endif
 
+# if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)    /* Disable warnings for Visual Studio*/
+#  define _CRT_SECURE_NO_WARNINGS
 # endif
 
+#endif  /*defined(LV_CONF_SKIP)*/
+
 #endif  /*LV_CONF_INTERNAL_H*/
 '''
 )

src/extra/extra.mk

@@ -0,0 +1 @@
+CSRCS += $(shell find -L ../src/extra -name \*.c)

src/extra/widgets/colorwheel/lv_colorwheel.c

@@ -260,12 +260,12 @@ static void draw_disc_grad(lv_obj_t * obj, const lv_area_t * mask)
     uint16_t i;
     lv_coord_t cir_w = lv_obj_get_style_arc_width(obj, LV_PART_MAIN);
 
-    /* Mask outer ring of widget to tidy up ragged edges of lines while drawing outer ring */
+#if LV_DRAW_COMPLEX
+    /* Mask outer and inner ring of widget to tidy up ragged edges of lines while drawing outer ring */
     lv_draw_mask_radius_param_t mask_out_param;
     lv_draw_mask_radius_init(&mask_out_param, &obj->coords, LV_RADIUS_CIRCLE, false);
     int16_t mask_out_id = lv_draw_mask_add(&mask_out_param, 0);
 
-
     lv_area_t mask_area;
     lv_area_copy(&mask_area, &obj->coords);
     mask_area.x1 += cir_w;
@@ -276,25 +276,30 @@ static void draw_disc_grad(lv_obj_t * obj, const lv_area_t * mask)
     lv_draw_mask_radius_init(&mask_in_param, &mask_area, LV_RADIUS_CIRCLE, true);
     int16_t mask_in_id = lv_draw_mask_add(&mask_in_param, 0);
 
-    /* The inner line ends will be masked out.
+    /* The inner and outer line ends will be masked out.
      * So make lines a little bit longer because the masking makes a more even result */
-    lv_coord_t cir_w_extra = cir_w + line_dsc.width;
+    lv_coord_t cir_w_extra = line_dsc.width;
+#else
+    lv_coord_t cir_w_extra = 0;
+#endif
 
 
     for(i = 0; i <= 360; i += LV_CPICKER_DEF_QF) {
         line_dsc.color = angle_to_mode_color(obj, i);
 
         lv_point_t p[2];
-        p[0].x = cx + ((r + line_dsc.width) * lv_trigo_sin(i) >> LV_TRIGO_SHIFT);
+        p[0].x = cx + ((r + cir_w_extra) * lv_trigo_sin(i) >> LV_TRIGO_SHIFT);
-        p[0].y = cy + ((r + line_dsc.width) * lv_trigo_sin(i + 90) >> LV_TRIGO_SHIFT);
+        p[0].y = cy + ((r + cir_w_extra) * lv_trigo_cos(i) >> LV_TRIGO_SHIFT);
-        p[1].x = cx + ((r - cir_w_extra) * lv_trigo_sin(i) >> LV_TRIGO_SHIFT);
+        p[1].x = cx + ((r - cir_w - cir_w_extra) * lv_trigo_sin(i) >> LV_TRIGO_SHIFT);
-        p[1].y = cy + ((r - cir_w_extra) * lv_trigo_sin(i + 90) >> LV_TRIGO_SHIFT);
+        p[1].y = cy + ((r - cir_w - cir_w_extra) * lv_trigo_cos(i) >> LV_TRIGO_SHIFT);
 
         lv_draw_line(&p[0], &p[1], mask, &line_dsc);
     }
+
+#if LV_DRAW_COMPLEX
     lv_draw_mask_remove_id(mask_out_id);
     lv_draw_mask_remove_id(mask_in_id);
-
+#endif
 }
 
 static void draw_knob(lv_obj_t * obj, const lv_area_t * mask)

src/extra/widgets/led/lv_led.c

@@ -81,7 +81,7 @@ void lv_led_set_color(lv_obj_t * led, lv_color_t color)
  * @param led pointer to a LED object
  * @param bright LV_LED_BRIGHT_MIN (max. dark) ... LV_LED_BRIGHT_MAX (max. light)
  */
-void lv_led_set_bright(lv_obj_t * obj, uint8_t bright)
+void lv_led_set_brightness(lv_obj_t * obj, uint8_t bright)
 {
     /*Set the brightness*/
     lv_led_t * led = (lv_led_t *) obj;
@@ -102,7 +102,7 @@ void lv_led_set_bright(lv_obj_t * obj, uint8_t bright)
  */
 void lv_led_on(lv_obj_t * led)
 {
-    lv_led_set_bright(led, LV_LED_BRIGHT_MAX);
+    lv_led_set_brightness(led, LV_LED_BRIGHT_MAX);
 }
 
 /**
@@ -111,7 +111,7 @@ void lv_led_on(lv_obj_t * led)
  */
 void lv_led_off(lv_obj_t * led)
 {
-    lv_led_set_bright(led, LV_LED_BRIGHT_MIN);
+    lv_led_set_brightness(led, LV_LED_BRIGHT_MIN);
 }
 
 /**

src/extra/widgets/tabview/lv_tabview.c

@@ -92,7 +92,7 @@ lv_obj_t * lv_tabview_add_tab(lv_obj_t * obj, const char * name)
         }
     }
     tabview->map = new_map;
-    lv_btnmatrix_set_map(btns, new_map);
+    lv_btnmatrix_set_map(btns, (const char **)new_map);
     lv_mem_free(old_map);
 
     lv_btnmatrix_set_btn_ctrl_all(btns, LV_BTNMATRIX_CTRL_CHECKABLE | LV_BTNMATRIX_CTRL_CLICK_TRIG | LV_BTNMATRIX_CTRL_NO_REPEAT);
@@ -179,7 +179,7 @@ static void lv_tabview_constructor(lv_obj_t * obj, lv_obj_t * parent, const lv_o
     lv_btnmatrix_set_one_checked(btnm, true);
     tabview->map = lv_mem_alloc(sizeof(const char *));
     tabview->map[0] = "";
-    lv_btnmatrix_set_map(btnm, tabview->map);
+    lv_btnmatrix_set_map(btnm, (const char **)tabview->map);
     lv_obj_add_event_cb(btnm, btns_event_cb, NULL);
     lv_obj_add_flag(btnm, LV_OBJ_FLAG_EVENT_BUBBLE);
 

src/lv_conf_internal.h

@@ -51,6 +51,7 @@
 
 #include <stdint.h>
 
+
 /*====================
    COLOR SETTINGS
  *====================*/
@@ -258,6 +259,62 @@
 #  endif
 #endif
 
+/*-------------
+ * GPU
+ *-----------*/
+
+/*Use STM32's DMA2D (aka Chrom Art) GPU*/
+#ifndef LV_USE_GPU_STM32_DMA2D
+#  ifdef CONFIG_LV_USE_GPU_STM32_DMA2D
+#    define LV_USE_GPU_STM32_DMA2D CONFIG_LV_USE_GPU_STM32_DMA2D
+#  else
+#    define  LV_USE_GPU_STM32_DMA2D  0
+#  endif
+#endif
+#if LV_USE_GPU_STM32_DMA2D
+/*Must be defined to include path of CMSIS header of target processor
+e.g. "stm32f769xx.h" or "stm32f429xx.h" */
+#ifndef LV_GPU_DMA2D_CMSIS_INCLUDE
+#  ifdef CONFIG_LV_GPU_DMA2D_CMSIS_INCLUDE
+#    define LV_GPU_DMA2D_CMSIS_INCLUDE CONFIG_LV_GPU_DMA2D_CMSIS_INCLUDE
+#  else
+#    define  LV_GPU_DMA2D_CMSIS_INCLUDE
+#  endif
+#endif
+#endif
+
+/* Use NXP's PXP GPU iMX RTxxx platforms */
+#ifndef LV_USE_GPU_NXP_PXP
+#  ifdef CONFIG_LV_USE_GPU_NXP_PXP
+#    define LV_USE_GPU_NXP_PXP CONFIG_LV_USE_GPU_NXP_PXP
+#  else
+#    define  LV_USE_GPU_NXP_PXP      0
+#  endif
+#endif
+#if LV_USE_GPU_NXP_PXP
+/*1: Add default bare metal and FreeRTOS interrupt handling routines for PXP (lv_gpu_nxp_pxp_osa.c)
+ *   and call lv_gpu_nxp_pxp_init() automatically during lv_init(). Note that symbol FSL_RTOS_FREE_RTOS
+ *   has to be defined in order to use FreeRTOS OSA, otherwise bare-metal implementation is selected.
+ *0: lv_gpu_nxp_pxp_init() has to be called manually before lv_init()
+ * */
+#ifndef LV_USE_GPU_NXP_PXP_AUTO_INIT
+#  ifdef CONFIG_LV_USE_GPU_NXP_PXP_AUTO_INIT
+#    define LV_USE_GPU_NXP_PXP_AUTO_INIT CONFIG_LV_USE_GPU_NXP_PXP_AUTO_INIT
+#  else
+#    define  LV_USE_GPU_NXP_PXP_AUTO_INIT 0
+#  endif
+#endif
+#endif
+
+/* Use NXP's VG-Lite GPU iMX RTxxx platforms */
+#ifndef LV_USE_GPU_NXP_VG_LITE
+#  ifdef CONFIG_LV_USE_GPU_NXP_VG_LITE
+#    define LV_USE_GPU_NXP_VG_LITE CONFIG_LV_USE_GPU_NXP_VG_LITE
+#  else
+#    define  LV_USE_GPU_NXP_VG_LITE   0
+#  endif
+#endif
+
 /*-------------
  * Logging
  *-----------*/
@@ -267,7 +324,7 @@
 #  ifdef CONFIG_LV_USE_LOG
 #    define LV_USE_LOG CONFIG_LV_USE_LOG
 #  else
-#    define  LV_USE_LOG      0
+#    define  LV_USE_LOG      1
 #  endif
 #endif
 #if LV_USE_LOG
@@ -292,7 +349,7 @@
 #  ifdef CONFIG_LV_LOG_PRINTF
 #    define LV_LOG_PRINTF CONFIG_LV_LOG_PRINTF
 #  else
-#    define  LV_LOG_PRINTF   0
+#    define  LV_LOG_PRINTF   1
 #  endif
 #endif
 #endif  /*LV_USE_LOG*/
@@ -303,15 +360,6 @@
 
 /* Enable asserts if an operation is failed or an invalid data is found.
  * If LV_USE_LOG is enabled an error message will be printed on failure*/
-#ifndef LV_USE_ASSERT
-#  ifdef CONFIG_LV_USE_ASSERT
-#    define LV_USE_ASSERT CONFIG_LV_USE_ASSERT
-#  else
-#    define  LV_USE_ASSERT        1
-#  endif
-#endif
-#if LV_USE_ASSERT
-
 #ifndef LV_USE_ASSERT_NULL
 #  ifdef CONFIG_LV_USE_ASSERT_NULL
 #    define LV_USE_ASSERT_NULL CONFIG_LV_USE_ASSERT_NULL
@@ -330,21 +378,21 @@
 #  ifdef CONFIG_LV_USE_ASSERT_STYLE
 #    define LV_USE_ASSERT_STYLE CONFIG_LV_USE_ASSERT_STYLE
 #  else
-#    define  LV_USE_ASSERT_STYLE         0   /*Check if the styles are properly initialized. (Very fast, recommended)*/
+#    define  LV_USE_ASSERT_STYLE         1   /*Check if the styles are properly initialized. (Very fast, recommended)*/
 #  endif
 #endif
 #ifndef LV_USE_ASSERT_MEM_INTEGRITY
 #  ifdef CONFIG_LV_USE_ASSERT_MEM_INTEGRITY
 #    define LV_USE_ASSERT_MEM_INTEGRITY CONFIG_LV_USE_ASSERT_MEM_INTEGRITY
 #  else
-#    define  LV_USE_ASSERT_MEM_INTEGRITY 0   /*Check the integrity of `lv_mem` after critical operations. (Slow)*/
+#    define  LV_USE_ASSERT_MEM_INTEGRITY 1   /*Check the integrity of `lv_mem` after critical operations. (Slow)*/
 #  endif
 #endif
 #ifndef LV_USE_ASSERT_OBJ
 #  ifdef CONFIG_LV_USE_ASSERT_OBJ
 #    define LV_USE_ASSERT_OBJ CONFIG_LV_USE_ASSERT_OBJ
 #  else
-#    define  LV_USE_ASSERT_OBJ           0   /*Check the object's type and existence (e.g. not deleted). (Slow) */
+#    define  LV_USE_ASSERT_OBJ           1   /*Check the object's type and existence (e.g. not deleted). (Slow) */
 #  endif
 #endif
 
@@ -364,12 +412,19 @@
 #  endif
 #endif
 
-#endif /*LV_USE_ASSERT*/
-
 /*-------------
  * Others
  *-----------*/
 
+/*1: Show CPU usage and FPS count in the right bottom corner*/
+#ifndef LV_USE_PERF_MONITOR
+#  ifdef CONFIG_LV_USE_PERF_MONITOR
+#    define LV_USE_PERF_MONITOR CONFIG_LV_USE_PERF_MONITOR
+#  else
+#    define  LV_USE_PERF_MONITOR     0
+#  endif
+#endif
+
 /*Change the built in (v)snprintf functions*/
 #ifndef LV_SPRINTF_CUSTOM
 #  ifdef CONFIG_LV_SPRINTF_CUSTOM
@@ -779,15 +834,6 @@
 #  endif
 #endif
 
-/*Always set a default font*/
-#ifndef LV_FONT_DEFAULT
-#  ifdef CONFIG_LV_FONT_DEFAULT
-#    define LV_THEME_FONT_NORMAL CONFIG_LV_FONT_DEFAULT
-#  else
-#    define  LV_THEME_FONT_NORMAL     &lv_font_montserrat_14
-#  endif
-#endif
-
 /* Enable handling large font and/or fonts with a lot of characters.
  * The limit depends on the font size, font face and bpp.
  * Compiler error will be triggered if a font needs it.*/
@@ -804,7 +850,7 @@
 #  ifdef CONFIG_LV_USE_FONT_COMPRESSED
 #    define LV_USE_FONT_COMPRESSED CONFIG_LV_USE_FONT_COMPRESSED
 #  else
-#    define  LV_USE_FONT_COMPRESSED 1
+#    define  LV_USE_FONT_COMPRESSED  0
 #  endif
 #endif
 
@@ -813,7 +859,7 @@
 #  ifdef CONFIG_LV_USE_FONT_SUBPX
 #    define LV_USE_FONT_SUBPX CONFIG_LV_USE_FONT_SUBPX
 #  else
-#    define  LV_USE_FONT_SUBPX 1
+#    define  LV_USE_FONT_SUBPX       0
 #  endif
 #endif
 #if LV_USE_FONT_SUBPX
@@ -899,7 +945,7 @@
 #  ifdef CONFIG_LV_USE_BIDI
 #    define LV_USE_BIDI CONFIG_LV_USE_BIDI
 #  else
-#    define  LV_USE_BIDI     1
+#    define  LV_USE_BIDI         0
 #  endif
 #endif
 #if LV_USE_BIDI
@@ -927,6 +973,72 @@
 #endif
 
 
+/*==================
+ *  THEME USAGE
+ *================*/
+/*Set the very basic the attributes*/
+#ifndef LV_THEME_COLOR_PRIMARY
+#  ifdef CONFIG_LV_THEME_COLOR_PRIMARY
+#    define LV_THEME_COLOR_PRIMARY CONFIG_LV_THEME_COLOR_PRIMARY
+#  else
+#    define  LV_THEME_COLOR_PRIMARY      lv_color_hex(0x01a2b1)
+#  endif
+#endif
+#ifndef LV_THEME_COLOR_SECONDARY
+#  ifdef CONFIG_LV_THEME_COLOR_SECONDARY
+#    define LV_THEME_COLOR_SECONDARY CONFIG_LV_THEME_COLOR_SECONDARY
+#  else
+#    define  LV_THEME_COLOR_SECONDARY    lv_color_hex(0x44d1b6)
+#  endif
+#endif
+#ifndef LV_THEME_FONT_SMALL
+#  ifdef CONFIG_LV_THEME_FONT_SMALL
+#    define LV_THEME_FONT_SMALL CONFIG_LV_THEME_FONT_SMALL
+#  else
+#    define  LV_THEME_FONT_SMALL         &lv_font_montserrat_14
+#  endif
+#endif
+#ifndef LV_THEME_FONT_NORMAL
+#  ifdef CONFIG_LV_THEME_FONT_NORMAL
+#    define LV_THEME_FONT_NORMAL CONFIG_LV_THEME_FONT_NORMAL
+#  else
+#    define  LV_THEME_FONT_NORMAL        &lv_font_montserrat_14
+#  endif
+#endif
+#ifndef LV_THEME_FONT_LARGE
+#  ifdef CONFIG_LV_THEME_FONT_LARGE
+#    define LV_THEME_FONT_LARGE CONFIG_LV_THEME_FONT_LARGE
+#  else
+#    define  LV_THEME_FONT_LARGE         &lv_font_montserrat_14
+#  endif
+#endif
+#ifndef LV_THEME_FONT_EXTRA_LARGE
+#  ifdef CONFIG_LV_THEME_FONT_EXTRA_LARGE
+#    define LV_THEME_FONT_EXTRA_LARGE CONFIG_LV_THEME_FONT_EXTRA_LARGE
+#  else
+#    define  LV_THEME_FONT_EXTRA_LARGE   &lv_font_montserrat_14
+#  endif
+#endif
+
+/* An external include file required to see the theme init function.
+ * Relative to "lv_core/lv_obj" */
+#ifndef LV_THEME_INIT_INCLUDE
+#  ifdef CONFIG_LV_THEME_INIT_INCLUDE
+#    define LV_THEME_INIT_INCLUDE CONFIG_LV_THEME_INIT_INCLUDE
+#  else
+#    define  LV_THEME_INIT_INCLUDE "../extra/themes/lv_themes.h"
+#  endif
+#endif
+
+/* Set a theme initialization function */
+#ifndef LV_THEME_INIT
+#  ifdef CONFIG_LV_THEME_INIT
+#    define LV_THEME_INIT CONFIG_LV_THEME_INIT
+#  else
+#    define  LV_THEME_INIT lv_theme_default_init
+#  endif
+#endif
+
 /*==================
  *  WIDGET USAGE
  *================*/
@@ -1114,22 +1226,64 @@
 #  ifdef CONFIG_LV_USE_CALENDAR
 #    define LV_USE_CALENDAR CONFIG_LV_USE_CALENDAR
 #  else
-#    define  LV_USE_CALENDAR     0
+#    define  LV_USE_CALENDAR     1
+#  endif
+#endif
+#if LV_USE_CALENDAR
+#ifndef LV_CALENDAR_WEEK_STARTS_MONDAY
+#  ifdef CONFIG_LV_CALENDAR_WEEK_STARTS_MONDAY
+#    define LV_CALENDAR_WEEK_STARTS_MONDAY CONFIG_LV_CALENDAR_WEEK_STARTS_MONDAY
+#  else
+#    define  LV_CALENDAR_WEEK_STARTS_MONDAY 0
+#  endif
+#endif
+# if LV_CALENDAR_WEEK_STARTS_MONDAY
+#ifndef LV_CALENDAR_DEFAULT_DAY_NAMES
+#  ifdef CONFIG_LV_CALENDAR_DEFAULT_DAY_NAMES
+#    define LV_CALENDAR_DEFAULT_DAY_NAMES CONFIG_LV_CALENDAR_DEFAULT_DAY_NAMES
+#  else
+#    define  LV_CALENDAR_DEFAULT_DAY_NAMES {"Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"}
+#  endif
+#endif
+# else
+#ifndef LV_CALENDAR_DEFAULT_DAY_NAMES
+#  ifdef CONFIG_LV_CALENDAR_DEFAULT_DAY_NAMES
+#    define LV_CALENDAR_DEFAULT_DAY_NAMES CONFIG_LV_CALENDAR_DEFAULT_DAY_NAMES
+#  else
+#    define  LV_CALENDAR_DEFAULT_DAY_NAMES {"Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"}
+#  endif
+#endif
+# endif
+
+#ifndef LV_CALENDAR_DEFAULT_MONTH_NAMES
+#  ifdef CONFIG_LV_CALENDAR_DEFAULT_MONTH_NAMES
+#    define LV_CALENDAR_DEFAULT_MONTH_NAMES CONFIG_LV_CALENDAR_DEFAULT_MONTH_NAMES
+#  else
+#    define  LV_CALENDAR_DEFAULT_MONTH_NAMES {"January", "February", "March",  "April", "May",  "June", "July", "August", "September", "October", "November", "December"}
 #  endif
 #endif
 #ifndef LV_USE_CALENDAR_HEADER_ARROW
 #  ifdef CONFIG_LV_USE_CALENDAR_HEADER_ARROW
 #    define LV_USE_CALENDAR_HEADER_ARROW CONFIG_LV_USE_CALENDAR_HEADER_ARROW
 #  else
-#    define  LV_USE_CALENDAR_HEADER_ARROW 0
+#    define  LV_USE_CALENDAR_HEADER_ARROW 1
 #  endif
 #endif
+#endif  /*LV_USE_CALENDAR*/
 
 #ifndef LV_USE_COLORWHEEL
 #  ifdef CONFIG_LV_USE_COLORWHEEL
 #    define LV_USE_COLORWHEEL CONFIG_LV_USE_COLORWHEEL
 #  else
-#    define  LV_USE_COLORWHEEL   0
+#    define  LV_USE_COLORWHEEL   1
+#  endif
+#endif
+
+#ifndef LV_USE_IMGBTN
+#  ifdef CONFIG_LV_USE_IMGBTN
+#    define LV_USE_IMGBTN CONFIG_LV_USE_IMGBTN
+#  else
+#    define  LV_USE_IMGBTN       1
 #  endif
 #endif
 
@@ -1137,7 +1291,7 @@
 #  ifdef CONFIG_LV_USE_KEYBOARD
 #    define LV_USE_KEYBOARD CONFIG_LV_USE_KEYBOARD
 #  else
-#    define  LV_USE_KEYBOARD     0
+#    define  LV_USE_KEYBOARD     1
 #  endif
 #endif
 
@@ -1145,7 +1299,7 @@
 #  ifdef CONFIG_LV_USE_LED
 #    define LV_USE_LED CONFIG_LV_USE_LED
 #  else
-#    define  LV_USE_LED          0
+#    define  LV_USE_LED          1
 #  endif
 #endif
 
@@ -1153,7 +1307,7 @@
 #  ifdef CONFIG_LV_USE_LIST
 #    define LV_USE_LIST CONFIG_LV_USE_LIST
 #  else
-#    define  LV_USE_LIST         0
+#    define  LV_USE_LIST         1
 #  endif
 #endif
 
@@ -1161,7 +1315,7 @@
 #  ifdef CONFIG_LV_USE_MSGBOX
 #    define LV_USE_MSGBOX CONFIG_LV_USE_MSGBOX
 #  else
-#    define  LV_USE_MSGBOX       0
+#    define  LV_USE_MSGBOX       1
 #  endif
 #endif
 
@@ -1169,7 +1323,7 @@
 #  ifdef CONFIG_LV_USE_SPINBOX
 #    define LV_USE_SPINBOX CONFIG_LV_USE_SPINBOX
 #  else
-#    define  LV_USE_SPINBOX      0
+#    define  LV_USE_SPINBOX      1
 #  endif
 #endif
 
@@ -1177,7 +1331,7 @@
 #  ifdef CONFIG_LV_USE_SPINNER
 #    define LV_USE_SPINNER CONFIG_LV_USE_SPINNER
 #  else
-#    define  LV_USE_SPINNER      0
+#    define  LV_USE_SPINNER      1
 #  endif
 #endif
 
@@ -1185,7 +1339,7 @@
 #  ifdef CONFIG_LV_USE_TABVIEW
 #    define LV_USE_TABVIEW CONFIG_LV_USE_TABVIEW
 #  else
-#    define  LV_USE_TABVIEW      0
+#    define  LV_USE_TABVIEW      1
 #  endif
 #endif
 
@@ -1193,7 +1347,7 @@
 #  ifdef CONFIG_LV_USE_TILEVIEW
 #    define LV_USE_TILEVIEW CONFIG_LV_USE_TILEVIEW
 #  else
-#    define  LV_USE_TILEVIEW     0
+#    define  LV_USE_TILEVIEW     1
 #  endif
 #endif
 
@@ -1201,14 +1355,14 @@
 #  ifdef CONFIG_LV_USE_WIN
 #    define LV_USE_WIN CONFIG_LV_USE_WIN
 #  else
-#    define  LV_USE_WIN          0
+#    define  LV_USE_WIN          1
 #  endif
 #endif
 
 /*-----------
  * Themes
  *----------*/
-/* Use the default theme. If not used a custom theme needs be assigned to the display.*/
+/* A simple, impressive and very complete theme */
 #ifndef LV_USE_THEME_DEFAULT
 #  ifdef CONFIG_LV_USE_THEME_DEFAULT
 #    define LV_USE_THEME_DEFAULT CONFIG_LV_USE_THEME_DEFAULT
@@ -1267,52 +1421,20 @@
 #  endif
 #endif
 
-/*==================
- * Non-user section
- *==================*/
-
-#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)    /* Disable warnings for Visual Studio*/
-#ifndef _CRT_SECURE_NO_WARNINGS
-#  ifdef CONFIG__CRT_SECURE_NO_WARNINGS
-#    define _CRT_SECURE_NO_WARNINGS CONFIG__CRT_SECURE_NO_WARNINGS
-#  else
-#    define  _CRT_SECURE_NO_WARNINGS
-#  endif
-#endif
-#endif
-
 
 
 /*If running without lv_conf.h add typdesf with default value*/
 #if defined(LV_CONF_SKIP)
 
-  /* Type of coordinates. Should be `int16_t` (or `int32_t` for extreme cases) */
-  typedef int16_t lv_coord_t;
-
-#  if LV_USE_ANIMATION
-  /*Declare the type of the user data of animations (can be e.g. `void *`, `int`, `struct`)*/
-  typedef void * lv_anim_user_data_t;
-#  endif
-
-#  if LV_USE_GROUP
-  typedef void * lv_group_user_data_t;
-#  endif
-
-#  if LV_USE_FILESYSTEM
-  typedef void * lv_fs_drv_user_data_t;
-#  endif
-
-  typedef void * lv_img_decoder_user_data_t;
-
-  typedef void * lv_disp_drv_user_data_t;             /*Type of user data in the display driver*/
-  typedef void * lv_indev_drv_user_data_t;            /*Type of user data in the input device driver*/
-
-  typedef void * lv_font_user_data_t;
 
 # if LV_USE_USER_DATA
   typedef void * lv_obj_user_data_t;
 # endif
 
+# if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)    /* Disable warnings for Visual Studio*/
+#  define _CRT_SECURE_NO_WARNINGS
 # endif
 
+#endif  /*defined(LV_CONF_SKIP)*/
+
 #endif  /*LV_CONF_INTERNAL_H*/

src/lv_core/lv_core.mk

@@ -1,16 +1,16 @@
-CSRCS += lv_grid.c
+CSRCS += lv_disp.c
 CSRCS += lv_group.c
 CSRCS += lv_indev.c
 CSRCS += lv_indev_scroll.c
-CSRCS += lv_disp.c
 CSRCS += lv_obj.c
+CSRCS += lv_obj_class.c
 CSRCS += lv_obj_pos.c
-CSRCS += lv_obj_style.c
 CSRCS += lv_obj_draw.c
 CSRCS += lv_obj_scroll.c
+CSRCS += lv_obj_style.c
+CSRCS += lv_obj_tree.c
 CSRCS += lv_refr.c
-CSRCS += lv_style.c
+CSRCS += lv_theme.c
-CSRCS += lv_flex.c
 
 DEPPATH += --dep-path $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_core
 VPATH += :$(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_core

src/lv_core/lv_disp.c

@@ -218,8 +218,8 @@ void lv_scr_load_anim(lv_obj_t * new_scr, lv_scr_load_anim_t anim_type, uint32_t
     /*Be sure both screens are in a normal position*/
     lv_obj_set_pos(new_scr, 0, 0);
     lv_obj_set_pos(lv_scr_act(), 0, 0);
-//    lv_style_remove_prop(lv_obj_get_local_style(new_scr, LV_PART_MAIN, LV_STATE_DEFAULT), LV_STYLE_OPA);
+    lv_obj_remove_local_style_prop(new_scr, LV_PART_MAIN, LV_STATE_DEFAULT, LV_STYLE_OPA);
-//    lv_style_remove_prop(lv_obj_get_local_style(lv_scr_act(), LV_PART_MAIN, LV_STATE_DEFAULT), LV_STYLE_OPA);
+    lv_obj_remove_local_style_prop(lv_scr_act(), LV_PART_MAIN, LV_STATE_DEFAULT, LV_STYLE_OPA);
 
     lv_anim_t a_new;
     lv_anim_init(&a_new);
@@ -379,7 +379,7 @@ static void scr_load_anim_start(lv_anim_t * a)
 
 static void opa_scale_anim(lv_obj_t * obj, lv_anim_value_t v)
 {
-//    lv_obj_set_style_bg_color(obj, LV_PART_MAIN, LV_STATE_DEFAULT, v);
+    lv_obj_set_style_opa(obj, LV_PART_MAIN, LV_STATE_DEFAULT, v);
 }
 
 static void scr_anim_ready(lv_anim_t * a)
@@ -389,5 +389,5 @@ static void scr_anim_ready(lv_anim_t * a)
     if(d->prev_scr && d->del_prev) lv_obj_del(d->prev_scr);
     d->prev_scr = NULL;
     d->scr_to_load = NULL;
-//    lv_style_remove_prop(lv_obj_get_local_style(a->var, LV_PART_MAIN, LV_STATE_DEFAULT), LV_STYLE_OPA);
+    lv_obj_remove_local_style_prop(a->var, LV_PART_MAIN, LV_STATE_DEFAULT, LV_STYLE_OPA);
 }

src/lv_core/lv_indev.c

@@ -29,12 +29,6 @@
  *      TYPEDEFS
  **********************/
 
-/**********************
- *  GLOBAL PROTOTYPES
- **********************/
-void lv_indev_scroll_handler(lv_indev_proc_t * proc);
-void lv_indev_scroll_throw_handler(lv_indev_proc_t * proc);
-
 /**********************
  *  STATIC PROTOTYPES
  **********************/
@@ -769,7 +763,7 @@ static void indev_proc_press(lv_indev_proc_t * proc)
     if(new_obj_searched && proc->types.pointer.last_obj) {
         proc->types.pointer.scroll_throw_vect.x = 0;
         proc->types.pointer.scroll_throw_vect.y = 0;
-        lv_indev_scroll_throw_handler(proc);
+        _lv_indev_scroll_throw_handler(proc);
         if(indev_reset_check(proc)) return;
     }
 
@@ -841,7 +835,7 @@ static void indev_proc_press(lv_indev_proc_t * proc)
 
         if(indev_act->proc.wait_until_release) return;
 
-        lv_indev_scroll_handler(proc);
+        _lv_indev_scroll_handler(proc);
         if(indev_reset_check(proc)) return;
         indev_gesture(proc);
         if(indev_reset_check(proc)) return;
@@ -923,7 +917,7 @@ static void indev_proc_release(lv_indev_proc_t * proc)
     /*The reset can be set in the signal function.
      * In case of reset query ignore the remaining parts.*/
     if(scroll_obj) {
-        lv_indev_scroll_throw_handler(proc);
+        _lv_indev_scroll_throw_handler(proc);
         if(indev_reset_check(proc)) return;
     }
 }

src/lv_core/lv_indev_scroll.c

@@ -42,11 +42,7 @@ static lv_coord_t elastic_diff(lv_obj_t * obj, lv_coord_t diff, lv_coord_t scrol
  *   GLOBAL FUNCTIONS
  **********************/
 
-/**
+void _lv_indev_scroll_handler(lv_indev_proc_t * proc)
- * Handle scrolling. Called by LVGL during input device processing
- * @param proc pointer to an input device's proc field
- */
-void lv_indev_scroll_handler(lv_indev_proc_t * proc)
 {
     lv_obj_t * scroll_obj = proc->types.pointer.scroll_obj;
     /*If there is no scroll object yet try to find one*/
@@ -97,11 +93,7 @@ void lv_indev_scroll_handler(lv_indev_proc_t * proc)
 }
 
 
-/**
+void _lv_indev_scroll_throw_handler(lv_indev_proc_t * proc)
- * Handle throwing after scrolling. Called by LVGL during input device processing
- * @param proc pointer to an input device's proc field
- */
-void lv_indev_scroll_throw_handler(lv_indev_proc_t * proc)
 {
     lv_obj_t * scroll_obj = proc->types.pointer.scroll_obj;
     if(scroll_obj == NULL) return;

src/lv_core/lv_indev_scroll.h

@@ -27,6 +27,18 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 
+/**
+ * Handle scrolling. Called by LVGL during input device processing
+ * @param proc pointer to an input device's proc field
+ */
+void _lv_indev_scroll_handler(lv_indev_proc_t * proc);
+
+/**
+ * Handle throwing after scrolling. Called by LVGL during input device processing
+ * @param proc pointer to an input device's proc field
+ */
+void _lv_indev_scroll_throw_handler(lv_indev_proc_t * proc);
+
 /**
  * Predict where would a scroll throw end
  * @param indev pointer to an input device

src/lv_core/lv_obj.c

@@ -59,13 +59,6 @@ typedef struct {
     const lv_anim_path_t * path;
 }trans_set_t;
 
-/**********************
- *  GLOBAL PROTOTYPES
- **********************/
-void lv_obj_style_create_transition(lv_obj_t * obj, lv_style_prop_t prop, uint8_t part, lv_state_t prev_state,
-                                       lv_state_t new_state, uint32_t time, uint32_t delay, const lv_anim_path_t * path);
-_lv_style_state_cmp_t lv_obj_style_state_compare(lv_obj_t * obj, lv_state_t state1, lv_state_t state2);
-
 /**********************
  *  STATIC PROTOTYPES
  **********************/
@@ -132,7 +125,9 @@ void lv_init(void)
     _lv_ll_init(&LV_GC_ROOT(_lv_disp_ll), sizeof(lv_disp_t));
     _lv_ll_init(&LV_GC_ROOT(_lv_indev_ll), sizeof(lv_indev_t));
 
-    lv_theme_t * th = LV_THEME_INIT
+    lv_theme_t * th = LV_THEME_INIT(LV_THEME_COLOR_PRIMARY, LV_THEME_COLOR_SECONDARY,
+                                    LV_THEME_FONT_SMALL, LV_THEME_FONT_NORMAL,
+                                    LV_THEME_FONT_LARGE, LV_THEME_FONT_EXTRA_LARGE);
 
     lv_theme_set_act(th);
 
@@ -151,6 +146,15 @@ void lv_init(void)
         LV_LOG_WARN("The strings has no UTF-8 encoding. Some characters won't be displayed.")
     }
 
+#if LV_USE_ASSERT_MEM_INTEGRITY
+    LV_LOG_WARN("Memory integrity checks are enabled via LV_USE_ASSERT_MEM_INTEGRITY which makes LVGL much slower")
+#endif
+
+#if LV_USE_ASSERT_OBJ
+    LV_LOG_WARN("Object sanity checks are enabled via LV_USE_ASSERT_OBJ which makes LVGL much slower")
+#endif
+
+
     lv_initialized = true;
     LV_LOG_INFO("lv_init ready");
 }
@@ -248,7 +252,7 @@ lv_res_t lv_event_send(lv_obj_t * obj, lv_event_t event, void * param)
 
     if(res == LV_RES_OK) {
         if(lv_obj_has_flag(obj, LV_OBJ_FLAG_EVENT_BUBBLE) && obj->parent) {
-            lv_res_t res = lv_event_send(obj->parent, event, param);
+            res = lv_event_send(obj->parent, event, param);
             if(res != LV_RES_OK) return LV_RES_INV;
         }
     }
@@ -273,12 +277,7 @@ uint32_t lv_event_register_id(void)
     return last_id;
 }
 
-/**
+void _lv_event_mark_deleted(lv_obj_t * obj)
- * Nested events can be called and one of them might belong to an object that is being deleted.
- * Mark this object's `event_temp_data` deleted to know that it's `lv_event_send` should return `LV_RES_INV`
- * @param obj pointer to an obejct to mark as deleted
- */
-void lv_event_mark_deleted(lv_obj_t * obj)
 {
     lv_event_temp_data_t * t = event_temp_data_head;
 
@@ -342,7 +341,7 @@ void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state)
     lv_state_t prev_state = obj->state;
     obj->state = new_state;
 
-    _lv_style_state_cmp_t cmp_res = lv_obj_style_state_compare(obj, prev_state, new_state);
+    _lv_style_state_cmp_t cmp_res = _lv_obj_style_state_compare(obj, prev_state, new_state);
     /*If there is no difference in styles there is nothing else to do*/
     if(cmp_res == _LV_STYLE_STATE_CMP_SAME) return;
 
@@ -381,7 +380,7 @@ void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state)
     }
 
     for(i = 0;i < tsi; i++) {
-        lv_obj_style_create_transition(obj, ts[i].prop, ts[i].part, prev_state, new_state, ts[i].time, ts[i].delay, ts[i].path);
+        _lv_obj_style_create_transition(obj, ts[i].prop, ts[i].part, prev_state, new_state, ts[i].time, ts[i].delay, ts[i].path);
     }
 
     lv_mem_buf_release(ts);

src/lv_core/lv_obj.h

@@ -343,6 +343,13 @@ void * lv_event_get_user_data(void);
  */
 uint32_t lv_event_register_id(void);
 
+/**
+ * Nested events can be called and one of them might belong to an object that is being deleted.
+ * Mark this object's `event_temp_data` deleted to know that it's `lv_event_send` should return `LV_RES_INV`
+ * @param obj pointer to an obejct to mark as deleted
+ */
+void _lv_event_mark_deleted(lv_obj_t * obj);
+
 /**
  * Send an event to the object
  * @param obj       pointer to an object
@@ -506,7 +513,7 @@ bool lv_obj_is_valid(const lv_obj_t * obj);
  *      MACROS
  **********************/
 
-#if LV_USE_ASSERT && LV_USE_ASSERT_OBJ
+#if LV_USE_ASSERT_OBJ
 #  define LV_ASSERT_OBJ(obj_p, obj_class)                                    \
             LV_ASSERT_MSG(obj_p != NULL, "The object is NULL");               \
             LV_ASSERT_MSG(lv_obj_has_class(obj_p, obj_class) == true, "Incompatible object type."); \

src/lv_core/lv_obj_class.c

@@ -7,6 +7,7 @@
  *      INCLUDES
  *********************/
 #include "lv_obj.h"
+#include "lv_theme.h"
 
 /*********************
  *      DEFINES
@@ -70,7 +71,7 @@ lv_obj_t * lv_obj_create_from_class(const lv_obj_class_t * class_p, lv_obj_t * p
     return obj;
 }
 
-void lv_obj_destruct(lv_obj_t * obj)
+void _lv_obj_destruct(lv_obj_t * obj)
 {
     if(obj->class_p->destructor_cb) obj->class_p->destructor_cb(obj);
 
@@ -79,7 +80,7 @@ void lv_obj_destruct(lv_obj_t * obj)
         obj->class_p = obj->class_p->base_class;
 
         /*Call the base class's destructor too*/
-        lv_obj_destruct(obj);
+        _lv_obj_destruct(obj);
     }
 }
 

src/lv_core/lv_obj_class.h

@@ -60,6 +60,8 @@ typedef struct _lv_obj_class_t{
  */
 struct _lv_obj_t * lv_obj_create_from_class(const struct _lv_obj_class_t * class_p, struct _lv_obj_t * parent, const struct _lv_obj_t * copy);
 
+void _lv_obj_destruct(struct _lv_obj_t * obj);
+
 lv_res_t lv_obj_signal_base(const lv_obj_class_t * class_p, struct _lv_obj_t * obj, lv_signal_t sign, void * param);
 
 lv_draw_res_t lv_obj_draw_base(const lv_obj_class_t * class_p, struct _lv_obj_t * obj, const lv_area_t * clip_area, lv_draw_mode_t mode);

src/lv_core/lv_obj_draw.c

@@ -174,8 +174,8 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
     }
 
     if(draw_dsc->bg_img_opa != LV_OPA_TRANSP) {
-        draw_dsc->img_src = lv_obj_get_style_bg_img_src(obj, part);
+        draw_dsc->bg_img_src = lv_obj_get_style_bg_img_src(obj, part);
-        if(draw_dsc->img_src) {
+        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);

src/lv_core/lv_obj_scroll.c

@@ -380,7 +380,7 @@ void lv_obj_scroll_to_view_recursive(lv_obj_t * obj, lv_anim_enable_t anim_en)
 {
     lv_obj_t * parent = lv_obj_get_parent(obj);
     while(parent) {
-        lv_obj_scroll_to_view(obj, LV_ANIM_ON);
+        lv_obj_scroll_to_view(obj, anim_en);
         obj = parent;
         parent = lv_obj_get_parent(parent);
     }

src/lv_core/lv_obj_style.c

@@ -136,7 +136,7 @@ void lv_obj_remove_style(lv_obj_t * obj, uint32_t part, uint32_t state, lv_style
 
         /*Shift the styles after `i` by one*/
         uint32_t j;
-        for(j = i; j < obj->style_list.style_cnt - 1 ; j++) {
+        for(j = i; j < (uint32_t)obj->style_list.style_cnt - 1 ; j++) {
             obj->style_list.styles[j] = obj->style_list.styles[j + 1];
         }
 
@@ -250,7 +250,7 @@ bool lv_obj_remove_local_style_prop(lv_obj_t * obj, uint32_t part, uint32_t stat
     return lv_style_remove_prop(obj->style_list.styles[i].style, prop);
 }
 
-void lv_obj_style_create_transition(lv_obj_t * obj, lv_style_prop_t prop, uint8_t part, lv_state_t prev_state,
+void _lv_obj_style_create_transition(lv_obj_t * obj, lv_style_prop_t prop, uint8_t part, lv_state_t prev_state,
                                        lv_state_t new_state, uint32_t time, uint32_t delay, const lv_anim_path_t * path)
 {
     trans_t * tr;
@@ -306,7 +306,7 @@ void lv_obj_style_create_transition(lv_obj_t * obj, lv_style_prop_t prop, uint8_
     }
 }
 
-_lv_style_state_cmp_t lv_obj_style_state_compare(lv_obj_t * obj, lv_state_t state1, lv_state_t state2)
+_lv_style_state_cmp_t _lv_obj_style_state_compare(lv_obj_t * obj, lv_state_t state1, lv_state_t state2)
 {
     lv_obj_style_list_t * list = &obj->style_list;
     _lv_style_state_cmp_t res = _LV_STYLE_STATE_CMP_SAME;
@@ -971,12 +971,12 @@ static void trans_anim_ready_cb(lv_anim_t * a)
 
 static void fade_anim_cb(lv_obj_t * obj, lv_anim_value_t v)
 {
-//    lv_obj_style_set_local_opa_scale(obj, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT, v);
+    lv_obj_set_style_opa(obj, LV_PART_MAIN, LV_STATE_DEFAULT, v);
 }
 
 static void fade_in_anim_ready(lv_anim_t * a)
 {
-//    lv_style_remove_prop(_lv_obj_get_local_style(a->var, LV_OBJ_PART_MAIN), LV_STYLE_OPA_SCALE);
+    lv_obj_remove_local_style_prop(a->var, LV_PART_MAIN,LV_STATE_DEFAULT, LV_STYLE_OPA);
 }
 
 

src/lv_core/lv_obj_style.h

@@ -157,6 +157,45 @@ void lv_obj_set_local_style_prop(struct _lv_obj_t * obj, uint32_t part, uint32_t
  */
 bool lv_obj_remove_local_style_prop(struct _lv_obj_t * obj, uint32_t part, uint32_t state, lv_style_prop_t prop);
 
+/**
+ * Used internally to create a style tarnsition
+ * @param obj
+ * @param prop
+ * @param part
+ * @param prev_state
+ * @param new_state
+ * @param time
+ * @param delay
+ * @param path
+ */
+void _lv_obj_style_create_transition(struct _lv_obj_t * obj, lv_style_prop_t prop, uint8_t part, lv_state_t prev_state,
+                                       lv_state_t new_state, uint32_t time, uint32_t delay, const lv_anim_path_t * path);
+
+/**
+ * Used internally to compare the appearance of an object in 2 states
+ * @param obj
+ * @param state1
+ * @param state2
+ * @return
+ */
+_lv_style_state_cmp_t _lv_obj_style_state_compare(struct _lv_obj_t * obj, lv_state_t state1, lv_state_t state2);
+
+/**
+ * Fade in an an object and all its children.
+ * @param obj       the object to fade in
+ * @param time      time of fade
+ * @param delay     delay to start the animation
+ */
+void lv_obj_fade_in(struct _lv_obj_t * obj, uint32_t time, uint32_t delay);
+
+/**
+ * Fade out an an object and all its children.
+ * @param obj       the object to fade out
+ * @param time      time of fade
+ * @param delay     delay to start the animation
+ */
+void lv_obj_fade_out(struct _lv_obj_t * obj, uint32_t time, uint32_t delay);
+
 /*********************
  * OBJ STYLE GET
  *********************/

src/lv_core/lv_obj_tree.c

@@ -25,10 +25,6 @@
  *      TYPEDEFS
  **********************/
 
-/**********************
- *  GLOBAL PROTOTYPES
- **********************/
-void lv_event_mark_deleted(lv_obj_t * obj);
 void lv_obj_destruct(lv_obj_t * obj);
 
 /**********************
@@ -269,12 +265,16 @@ lv_obj_t * lv_obj_get_child(const lv_obj_t * obj, int32_t id)
 
     if(obj->spec_attr == NULL) return NULL;
 
+    uint32_t idu;
     if(id < 0) {
         id = obj->spec_attr->child_cnt + id;
         if(id < 0) return NULL;
+        idu = (uint32_t) id;
+    } else {
+        idu = id;
     }
 
-    if(id >= obj->spec_attr->child_cnt) return NULL;
+    if(idu >= obj->spec_attr->child_cnt) return NULL;
     else return obj->spec_attr->children[id];
 }
 
@@ -331,7 +331,7 @@ static void obj_del_core(lv_obj_t * obj)
         child = lv_obj_get_child(obj, 0);
     }
 
-    lv_event_mark_deleted(obj);
+    _lv_event_mark_deleted(obj);
 
     /*Remove all style*/
     lv_obj_enable_style_refresh(false); /*No need to refresh the style because the object will be deleted*/
@@ -355,7 +355,7 @@ static void obj_del_core(lv_obj_t * obj)
     }
 
     /* All children deleted. Now clean up the object specific data*/
-    lv_obj_destruct(obj);
+    _lv_obj_destruct(obj);
 
     /*Remove the object from the child list of its parent*/
     uint32_t id = lv_obj_get_child_id(obj);

src/lv_draw/lv_draw_arc.c

@@ -11,6 +11,7 @@
 #include "lv_draw_mask.h"
 #include "../lv_misc/lv_math.h"
 #include "../lv_misc/lv_log.h"
+#include "../lv_misc/lv_mem.h"
 
 /*********************
  *      DEFINES

src/lv_draw/lv_draw_blend.c

@@ -299,9 +299,7 @@ LV_ATTRIBUTE_FAST_MEM static void fill_normal(const lv_area_t * disp_area, lv_co
                                               const lv_opa_t * mask, lv_draw_mask_res_t mask_res)
 {
 
-#if LV_USE_GPU || LV_COLOR_SCREEN_TRANSP
     lv_disp_t * disp = _lv_refr_get_disp_refreshing();
-#endif
 
     /*Get the width of the `disp_area` it will be used to go to the next line*/
     int32_t disp_w = lv_area_get_width(disp_area);
@@ -335,12 +333,13 @@ LV_ATTRIBUTE_FAST_MEM static void fill_normal(const lv_area_t * disp_area, lv_co
                 lv_gpu_stm32_dma2d_fill(disp_buf_first, disp_w, color, draw_area_w, draw_area_h);
                 return;
             }
-#elif LV_USE_GPU
+#endif
+
             if(disp->driver.gpu_fill_cb && lv_area_get_size(draw_area) > GPU_SIZE_LIMIT) {
                 disp->driver.gpu_fill_cb(&disp->driver, disp_buf, disp_w, draw_area, color);
                 return;
             }
-#endif
+
             /*Software rendering*/
             for(y = 0; y < draw_area_h; y++) {
                 lv_color_fill(disp_buf_first, color, draw_area_w);
@@ -393,14 +392,6 @@ LV_ATTRIBUTE_FAST_MEM static void fill_normal(const lv_area_t * disp_area, lv_co
     }
     /*Masked*/
     else {
-        /*DMA2D could be used here but it's much slower than software rendering*/
-#if LV_USE_GPU_STM32_DMA2D && 0
-        if(lv_area_get_size(draw_area) > 240) {
-            lv_gpu_stm32_dma2d_fill_mask(disp_buf_first, disp_w, color, mask, opa, draw_area_w, draw_area_h);
-            return;
-        }
-#endif
-
         /*Buffer the result color to avoid recalculating the same color*/
         lv_color_t last_dest_color;
         lv_color_t last_res_color;
@@ -693,17 +684,6 @@ LV_ATTRIBUTE_FAST_MEM static void map_normal(const lv_area_t * disp_area, lv_col
 
     /*Simple fill (maybe with opacity), no masking*/
     if(mask_res == LV_DRAW_MASK_RES_FULL_COVER) {
-#if LV_USE_GPU
-        if(disp->driver.gpu_blend_cb && (lv_area_get_size(draw_area) > GPU_SIZE_LIMIT)) {
-            for(y = draw_area->y1; y <= draw_area->y2; y++) {
-                disp->driver.gpu_blend_cb(&disp->driver, disp_buf_first, map_buf_first, draw_area_w, opa);
-                disp_buf_first += disp_w;
-                map_buf_first += map_w;
-            }
-            return;
-        }
-#endif
-
         if(opa > LV_OPA_MAX) {
 #if LV_USE_GPU_NXP_PXP
             if(lv_area_get_size(draw_area) >= LV_GPU_NXP_PXP_BLIT_SIZE_LIMIT) {

src/lv_draw/lv_draw_rect.c

@@ -1199,7 +1199,7 @@ static void draw_content(const lv_area_t * coords, const lv_area_t * clip, const
     label_dsc.letter_space = dsc->content_letter_space;
     label_dsc.line_space = dsc->content_line_space;
     lv_point_t s;
-    lv_txt_get_size(&s, dsc->content_text, label_dsc.font, label_dsc.letter_space, label_dsc.line_space, LV_COORD_MAX,
+    lv_txt_get_size(&s, txt, label_dsc.font, label_dsc.letter_space, label_dsc.line_space, LV_COORD_MAX,
             LV_TEXT_FLAG_NONE);
 
 

src/lv_misc/lv_assert.c

@@ -1,138 +0,0 @@
-/**
- * @file lv_assert.c
- *
- */
-
-/*********************
- *      INCLUDES
- *********************/
-#include "lv_assert.h"
-
-#if LV_USE_ASSERT
-
-#include "lv_mem.h"
-#include <string.h>
-
-/*********************
- *      DEFINES
- *********************/
-#ifndef LV_DEBUG_STR_MAX_LENGTH
-    #define LV_DEBUG_STR_MAX_LENGTH  (1024 * 8)
-#endif
-
-#ifndef LV_DEBUG_STR_MAX_REPEAT
-    #define LV_DEBUG_STR_MAX_REPEAT  8
-#endif
-/**********************
- *      TYPEDEFS
- **********************/
-
-/**********************
- *  STATIC PROTOTYPES
- **********************/
-
-/**********************
- *  STATIC VARIABLES
- **********************/
-
-/**********************
- *      MACROS
- **********************/
-
-/**********************
- *   GLOBAL FUNCTIONS
- **********************/
-
-bool lv_debug_check_null(const void * p)
-{
-    if(p) return true;
-
-    return false;
-}
-
-bool lv_debug_check_mem_integrity(void)
-{
-    return lv_mem_test() == LV_RES_OK ? true : false;
-}
-
-bool lv_debug_check_str(const void * str)
-{
-    const uint8_t * s = (const uint8_t *)str;
-    uint8_t last_byte = 0;
-    uint32_t rep = 0;
-    uint32_t i;
-
-    for(i = 0; i < LV_DEBUG_STR_MAX_LENGTH && s[i] != '\0'; i++) {
-        if(s[i] != last_byte) {
-            last_byte = s[i];
-            rep = 1;
-        }
-        else if(s[i] > 0x7F) {
-            rep++;
-            if(rep > LV_DEBUG_STR_MAX_REPEAT) {
-                LV_LOG_WARN("lv_debug_check_str: a non-ASCII char has repeated more than LV_DEBUG_STR_MAX_REPEAT times)");
-                return false;
-            }
-        }
-
-        if(s[i] < 10) {
-            LV_LOG_WARN("lv_debug_check_str: invalid char in the string (< 10 value)");
-            return false;   /*Shouldn't occur in strings*/
-        }
-    }
-
-    if(s[i] == '\0') return true;
-
-    LV_LOG_WARN("lv_debug_check_str: string is longer than LV_DEBUG_STR_MAX_LENGTH");
-    return false;
-}
-
-void lv_debug_log_error(const char * msg, uint64_t value)
-{
-    static const char hex[] = "0123456789ABCDEF";
-
-    size_t msg_len = strlen(msg);
-    uint32_t value_len = sizeof(unsigned long int);
-
-    if(msg_len < 230) {
-        char buf[255];
-        char * bufp = buf;
-
-        /*Add the function name*/
-        lv_memcpy(bufp, msg, msg_len);
-        bufp += msg_len;
-
-        /*Add value in hey*/
-        *bufp = ' ';
-        bufp ++;
-        *bufp = '(';
-        bufp ++;
-        *bufp = '0';
-        bufp ++;
-        *bufp = 'x';
-        bufp ++;
-
-        int8_t i;
-        for(i = value_len * 2 - 1; i >= 0; i--) {
-            uint8_t x = (unsigned long int)((unsigned long int)value >> (i * 4)) & 0xF;
-
-            *bufp = hex[x];
-            bufp++;
-        }
-
-        *bufp = ')';
-        bufp ++;
-
-        *bufp = '\0';
-        LV_LOG_ERROR(buf);
-    }
-    else {
-        LV_LOG_ERROR(msg);
-    }
-}
-
-/**********************
- *   STATIC FUNCTIONS
- **********************/
-
-#endif /*LV_USE_ASSERT*/

src/lv_misc/lv_assert.h

@@ -14,8 +14,6 @@ extern "C" {
  *      INCLUDES
  *********************/
 #include "../lv_conf_internal.h"
-
-#if LV_USE_ASSERT
 #include <stdbool.h>
 
 /*********************
@@ -29,13 +27,6 @@ extern "C" {
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
-bool lv_debug_check_null(const void * p);
-
-bool lv_debug_check_mem_integrity(void);
-
-bool lv_debug_check_str(const void * str);
-
-void lv_debug_log_error(const char * msg, uint64_t value);
 
 /**********************
  *      MACROS
@@ -82,17 +73,6 @@ void lv_debug_log_error(const char * msg, uint64_t value);
 # define LV_ASSERT_MALLOC_INTEGRIT()
 #endif
 
-#else /* LV_USE_ASSERT == 0 */
-
-#define LV_ASSERT(expr)    do{}while(0)
-#define LV_ASSERT_MSG(expr, msg)    do{}while(0)
-
-#define LV_ASSERT_NULL(p)
-#define LV_ASSERT_MALLOC(p)
-#define LV_ASSERT_MALLOC_INTEGRITY()
-
-#endif /* LV_USE_ASSERT */
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

src/lv_misc/lv_mem.c

@@ -153,8 +153,6 @@ void lv_mem_deinit(void)
  */
 void * lv_mem_alloc(size_t size)
 {
- //   printf("alloc: %d\n", size);
-
     if(size == 0) return &zero_mem;
 
     /*Round the size up to ALIGN_MASK*/
@@ -229,7 +227,6 @@ void lv_mem_free(const void * data)
     lv_memset((void *)data, 0xbb, lv_mem_get_size(data));
 #  endif
 #endif
-//    printf("free: %d\n", lv_mem_get_size(data));
 
     #if LV_MEM_CUSTOM == 0
     e->header.s.used = 0;

src/lv_misc/lv_misc.mk

@@ -14,7 +14,6 @@ CSRCS += lv_utils.c
 CSRCS += lv_async.c
 CSRCS += lv_printf.c
 CSRCS += lv_bidi.c
-CSRCS += lv_debug.c
 
 DEPPATH += --dep-path $(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_misc
 VPATH += :$(LVGL_DIR)/$(LVGL_DIR_NAME)/src/lv_misc

src/lv_misc/lv_style.h

@@ -51,10 +51,8 @@ LV_EXPORT_CONST_INT(LV_IMG_ZOOM_NONE);
  */
 enum {
     LV_BLEND_MODE_NORMAL,     /**< Simply mix according to the opacity value*/
-#if LV_DRAW_COMPLEX
     LV_BLEND_MODE_ADDITIVE,   /**< Add the respective color channels*/
     LV_BLEND_MODE_SUBTRACTIVE,/**< Subtract the foreground from the background*/
-#endif
 };
 
 typedef uint8_t lv_blend_mode_t;
@@ -657,7 +655,7 @@ static inline void lv_style_set_pad_all(lv_style_t * style, lv_coord_t value)
  *      MACROS
  **********************/
 
-#if LV_USE_ASSERT && LV_USE_ASSERT_STYLE
+#if LV_USE_ASSERT_STYLE
 #  define LV_ASSERT_STYLE(style_p)    LV_ASSERT_MSG(style_p != NULL, "The style is NULL");          \
                                       LV_ASSERT_MSG(style_p->sentinel == LV_STYLE_SENTINEL_VALUE, "Style is not initialized or corrupted");
 #else

src/lv_widgets/lv_arc.c

@@ -31,7 +31,6 @@
  **********************/
 
 static void lv_arc_constructor(lv_obj_t * obj, lv_obj_t * parent, const lv_obj_t * copy);
-static void lv_arc_destructor(lv_obj_t * obj);
 static lv_draw_res_t lv_arc_draw(lv_obj_t * arc, const lv_area_t * clip_area, lv_draw_mode_t mode);
 static lv_res_t lv_arc_signal(lv_obj_t * arc, lv_signal_t sign, void * param);
 static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle, uint8_t part);
@@ -44,7 +43,6 @@ static void value_update(lv_obj_t * arc);
  **********************/
 const lv_obj_class_t lv_arc_class  = {
     .constructor_cb = lv_arc_constructor,
-    .destructor_cb = lv_arc_destructor,
     .signal_cb = lv_arc_signal,
     .draw_cb = lv_arc_draw,
     .instance_size = sizeof(lv_arc_t),
@@ -489,8 +487,6 @@ static void lv_arc_constructor(lv_obj_t * obj, lv_obj_t * parent, const lv_obj_t
     lv_arc_t * arc = (lv_arc_t *)obj;
     LV_LOG_TRACE("arc create started");
 
-    /*Create the ancestor of arc*/
-
    /*Initialize the allocated 'ext' */
    arc->rotation = 0;
    arc->bg_angle_start = 135;
@@ -533,20 +529,6 @@ static void lv_arc_constructor(lv_obj_t * obj, lv_obj_t * parent, const lv_obj_t
 
 }
 
-static void lv_arc_destructor(lv_obj_t * obj)
-{
-//    lv_arc_t * arc = obj;
-//
-//    _lv_obj_reset_style_list_no_refr(obj, LV_BAR_PART_INDIC);
-//#if LV_USE_ANIMATION
-//    lv_anim_del(&arc->cur_value_anim, NULL);
-//    lv_anim_del(&arc->start_value_anim, NULL);
-//#endif
-//
-//   arc->class_p->base_p->destructor(obj);
-}
-
-
 static lv_draw_res_t lv_arc_draw(lv_obj_t * obj, const lv_area_t * clip_area, lv_draw_mode_t mode)
 {
     /*Return false if the object is not covers the mask_p area*/