Update LVGL to v9.1.0

14 files changed, 32 insertions, 302 deletions

diff --git a/lib/lvgl/examples/scroll/index.rst b/lib/lvgl/examples/scroll/index.rst
index 0b392051..0691ce77 100644
--- a/lib/lvgl/examples/scroll/index.rst
+++ b/lib/lvgl/examples/scroll/index.rst
@@ -1,32 +1,32 @@
 
 Nested scrolling
-""""""""""""""""
+----------------
 
 .. lv_example:: scroll/lv_example_scroll_1
   :language: c
 
 Snapping
-""""""""""""""""
+--------
 .. lv_example:: scroll/lv_example_scroll_2
   :language: c
 
 Floating button
-""""""""""""""""
+----------------
 .. lv_example:: scroll/lv_example_scroll_3
   :language: c
 
 Styling the scrollbars
-""""""""""""""""""""""""
+----------------------
 .. lv_example:: scroll/lv_example_scroll_4
   :language: c
 
 Right to left scrolling
-""""""""""""""""""""""""
+-----------------------
 .. lv_example:: scroll/lv_example_scroll_5
   :language: c
 
 Translate on scroll
-""""""""""""""""""""""""
+-------------------
 .. lv_example:: scroll/lv_example_scroll_6
   :language: c
 
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll.h b/lib/lvgl/examples/scroll/lv_example_scroll.h
index dc38bef0..f6443b45 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll.h
+++ b/lib/lvgl/examples/scroll/lv_example_scroll.h
@@ -32,7 +32,6 @@ void lv_example_scroll_4(void);
 void lv_example_scroll_5(void);
 void lv_example_scroll_6(void);
 
-
 /**********************
  *      MACROS
  **********************/
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_1.c b/lib/lvgl/examples/scroll/lv_example_scroll_1.c
index 4f7e1214..18941305 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_1.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_1.c
@@ -7,7 +7,7 @@
 void lv_example_scroll_1(void)
 {
     /*Create an object with the new style*/
-    lv_obj_t * panel = lv_obj_create(lv_scr_act());
+    lv_obj_t * panel = lv_obj_create(lv_screen_active());
     lv_obj_set_size(panel, 200, 200);
     lv_obj_center(panel);
 
@@ -25,7 +25,7 @@ void lv_example_scroll_1(void)
     lv_obj_set_pos(child, 160, 80);
     lv_obj_set_size(child, 80, 80);
 
-    lv_obj_t * child2 = lv_btn_create(child);
+    lv_obj_t * child2 = lv_button_create(child);
     lv_obj_set_size(child2, 100, 50);
 
     label = lv_label_create(child2);
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_1.py b/lib/lvgl/examples/scroll/lv_example_scroll_1.py
deleted file mode 100644
index f0458971..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_1.py
+++ /dev/null
@@ -1,38 +0,0 @@
-#
-# Demonstrate how scrolling appears automatically
-#
-# Create an object with the new style
-panel = lv.obj(lv.scr_act())
-panel.set_size(200, 200)
-panel.center()
-
-child = lv.obj(panel)
-child.set_pos(0, 0)
-label = lv.label(child)
-label.set_text("Zero")
-label.center()
-
-child = lv.obj(panel)
-child.set_pos(-40, 100)
-label = lv.label(child)
-label.set_text("Left")
-label.center()
-
-child = lv.obj(panel)
-child.set_pos(90, -30)
-label = lv.label(child)
-label.set_text("Top")
-label.center()
-
-child = lv.obj(panel)
-child.set_pos(150, 80)
-label = lv.label(child)
-label.set_text("Right")
-label.center()
-
-child = lv.obj(panel)
-child.set_pos(60, 170)
-label = lv.label(child)
-label.set_text("Bottom")
-label.center()
-
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_2.c b/lib/lvgl/examples/scroll/lv_example_scroll_2.c
index 37d19f0b..13385c23 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_2.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_2.c
@@ -10,7 +10,7 @@ static void sw_event_cb(lv_event_t * e)
         lv_obj_t * list = lv_event_get_user_data(e);
 
         if(lv_obj_has_state(sw, LV_STATE_CHECKED)) lv_obj_add_flag(list, LV_OBJ_FLAG_SCROLL_ONE);
-        else lv_obj_clear_flag(list, LV_OBJ_FLAG_SCROLL_ONE);
+        else lv_obj_remove_flag(list, LV_OBJ_FLAG_SCROLL_ONE);
     }
 }
 
@@ -19,7 +19,7 @@ static void sw_event_cb(lv_event_t * e)
  */
 void lv_example_scroll_2(void)
 {
-    lv_obj_t * panel = lv_obj_create(lv_scr_act());
+    lv_obj_t * panel = lv_obj_create(lv_screen_active());
     lv_obj_set_size(panel, 280, 120);
     lv_obj_set_scroll_snap_x(panel, LV_SCROLL_SNAP_CENTER);
     lv_obj_set_flex_flow(panel, LV_FLEX_FLOW_ROW);
@@ -27,13 +27,13 @@ void lv_example_scroll_2(void)
 
     uint32_t i;
     for(i = 0; i < 10; i++) {
-        lv_obj_t * btn = lv_btn_create(panel);
+        lv_obj_t * btn = lv_button_create(panel);
         lv_obj_set_size(btn, 150, lv_pct(100));
 
         lv_obj_t * label = lv_label_create(btn);
         if(i == 3) {
             lv_label_set_text_fmt(label, "Panel %"LV_PRIu32"\nno snap", i);
-            lv_obj_clear_flag(btn, LV_OBJ_FLAG_SNAPPABLE);
+            lv_obj_remove_flag(btn, LV_OBJ_FLAG_SNAPPABLE);
         }
         else {
             lv_label_set_text_fmt(label, "Panel %"LV_PRIu32, i);
@@ -45,10 +45,10 @@ void lv_example_scroll_2(void)
 
 #if LV_USE_SWITCH
     /*Switch between "One scroll" and "Normal scroll" mode*/
-    lv_obj_t * sw = lv_switch_create(lv_scr_act());
+    lv_obj_t * sw = lv_switch_create(lv_screen_active());
     lv_obj_align(sw, LV_ALIGN_TOP_RIGHT, -20, 10);
     lv_obj_add_event_cb(sw, sw_event_cb, LV_EVENT_ALL, panel);
-    lv_obj_t * label = lv_label_create(lv_scr_act());
+    lv_obj_t * label = lv_label_create(lv_screen_active());
     lv_label_set_text(label, "One scroll");
     lv_obj_align_to(label, sw, LV_ALIGN_OUT_BOTTOM_MID, 0, 5);
 #endif
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_2.py b/lib/lvgl/examples/scroll/lv_example_scroll_2.py
deleted file mode 100644
index 52e40e30..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_2.py
+++ /dev/null
@@ -1,47 +0,0 @@
-def sw_event_cb(e,panel):
-
-    code = e.get_code()
-    sw = e.get_target()
-
-    if code == lv.EVENT.VALUE_CHANGED:
-
-        if sw.has_state(lv.STATE.CHECKED):
-            panel.add_flag(lv.obj.FLAG.SCROLL_ONE)
-        else:
-            panel.clear_flag(lv.obj.FLAG.SCROLL_ONE)
-
-
-#
-# Show an example to scroll snap
-#
-
-panel = lv.obj(lv.scr_act())
-panel.set_size(280, 150)
-panel.set_scroll_snap_x(lv.SCROLL_SNAP.CENTER)
-panel.set_flex_flow(lv.FLEX_FLOW.ROW)
-panel.center()
-
-for i in range(10):
-    btn = lv.btn(panel)
-    btn.set_size(150, 100)
-
-    label = lv.label(btn)
-    if i == 3:
-        label.set_text("Panel {:d}\nno snap".format(i))
-        btn.clear_flag(lv.obj.FLAG.SNAPPABLE)
-    else:
-        label.set_text("Panel {:d}".format(i))
-    label.center()
-
-panel.update_snap(lv.ANIM.ON)
-
-
-# Switch between "One scroll" and "Normal scroll" mode
-sw = lv.switch(lv.scr_act())
-sw.align(lv.ALIGN.TOP_RIGHT, -20, 10)
-sw.add_event_cb(lambda evt:  sw_event_cb(evt,panel), lv.EVENT.ALL, None)
-label = lv.label(lv.scr_act())
-label.set_text("One scroll")
-label.align_to(sw, lv.ALIGN.OUT_BOTTOM_MID, 0, 5)
-
-
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_3.c b/lib/lvgl/examples/scroll/lv_example_scroll_3.c
index 1d05e690..8181c434 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_3.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_3.c
@@ -3,7 +3,7 @@
 
 static uint32_t btn_cnt = 1;
 
-static void float_btn_event_cb(lv_event_t * e)
+static void float_button_event_cb(lv_event_t * e)
 {
     lv_event_code_t code = lv_event_get_code(e);
     lv_obj_t * float_btn = lv_event_get_target(e);
@@ -12,7 +12,7 @@ static void float_btn_event_cb(lv_event_t * e)
         lv_obj_t * list = lv_event_get_user_data(e);
         char buf[32];
         lv_snprintf(buf, sizeof(buf), "Track %d", (int)btn_cnt);
-        lv_obj_t * list_btn = lv_list_add_btn(list, LV_SYMBOL_AUDIO, buf);
+        lv_obj_t * list_btn = lv_list_add_button(list, LV_SYMBOL_AUDIO, buf);
         btn_cnt++;
 
         lv_obj_move_foreground(float_btn);
@@ -26,23 +26,23 @@ static void float_btn_event_cb(lv_event_t * e)
  */
 void lv_example_scroll_3(void)
 {
-    lv_obj_t * list = lv_list_create(lv_scr_act());
+    lv_obj_t * list = lv_list_create(lv_screen_active());
     lv_obj_set_size(list, 280, 220);
     lv_obj_center(list);
 
     for(btn_cnt = 1; btn_cnt <= 2; btn_cnt++) {
         char buf[32];
         lv_snprintf(buf, sizeof(buf), "Track %d", (int)btn_cnt);
-        lv_list_add_btn(list, LV_SYMBOL_AUDIO, buf);
+        lv_list_add_button(list, LV_SYMBOL_AUDIO, buf);
     }
 
-    lv_obj_t * float_btn = lv_btn_create(list);
+    lv_obj_t * float_btn = lv_button_create(list);
     lv_obj_set_size(float_btn, 50, 50);
     lv_obj_add_flag(float_btn, LV_OBJ_FLAG_FLOATING);
     lv_obj_align(float_btn, LV_ALIGN_BOTTOM_RIGHT, 0, -lv_obj_get_style_pad_right(list, LV_PART_MAIN));
-    lv_obj_add_event_cb(float_btn, float_btn_event_cb, LV_EVENT_ALL, list);
+    lv_obj_add_event_cb(float_btn, float_button_event_cb, LV_EVENT_ALL, list);
     lv_obj_set_style_radius(float_btn, LV_RADIUS_CIRCLE, 0);
-    lv_obj_set_style_bg_img_src(float_btn, LV_SYMBOL_PLUS, 0);
+    lv_obj_set_style_bg_image_src(float_btn, LV_SYMBOL_PLUS, 0);
     lv_obj_set_style_text_font(float_btn, lv_theme_get_font_large(float_btn), 0);
 }
 
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_3.py b/lib/lvgl/examples/scroll/lv_example_scroll_3.py
deleted file mode 100644
index aae306e0..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_3.py
+++ /dev/null
@@ -1,38 +0,0 @@
-class ScrollExample_3():
-    def __init__(self):
-        self.btn_cnt = 1
-        #
-        # Create a list with a floating button
-        #
-
-        list = lv.list(lv.scr_act())
-        list.set_size(280, 220)
-        list.center()
-
-        for btn_cnt in range(2):
-            list.add_btn(lv.SYMBOL.AUDIO,"Track {:d}".format(btn_cnt))
-
-        float_btn = lv.btn(list)
-        float_btn.set_size(50, 50)
-        float_btn.add_flag(lv.obj.FLAG.FLOATING)
-        float_btn.align(lv.ALIGN.BOTTOM_RIGHT, 0, -list.get_style_pad_right(lv.PART.MAIN))
-        float_btn.add_event_cb(lambda evt: self.float_btn_event_cb(evt,list), lv.EVENT.ALL, None)
-        float_btn.set_style_radius(lv.RADIUS.CIRCLE, 0)
-        float_btn.set_style_bg_img_src(lv.SYMBOL.PLUS, 0)
-        float_btn.set_style_text_font(lv.theme_get_font_large(float_btn), 0)
-
-    def float_btn_event_cb(self,e,list):
-        code = e.get_code()
-        float_btn = e.get_target()
-
-        if code == lv.EVENT.CLICKED:
-            list_btn = list.add_btn(lv.SYMBOL.AUDIO, "Track {:d}".format(self.btn_cnt))
-            self.btn_cnt += 1
-
-            float_btn.move_foreground()
-
-            list_btn.scroll_to_view(lv.ANIM.ON)
-
-scroll_example_3 = ScrollExample_3()
-
-
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_4.c b/lib/lvgl/examples/scroll/lv_example_scroll_4.c
index 5bbff5c2..f0c741ba 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_4.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_4.c
@@ -1,13 +1,12 @@
 #include "../lv_examples.h"
 #if LV_BUILD_EXAMPLES && LV_USE_LIST
 
-
 /**
  * Styling the scrollbars
  */
 void lv_example_scroll_4(void)
 {
-    lv_obj_t * obj = lv_obj_create(lv_scr_act());
+    lv_obj_t * obj = lv_obj_create(lv_screen_active());
     lv_obj_set_size(obj, 200, 100);
     lv_obj_center(obj);
 
@@ -28,7 +27,6 @@ void lv_example_scroll_4(void)
                       "Fusce molestie rhoncus nisi sit amet tincidunt. \n"
                       "Suspendisse a nunc ut magna ornare volutpat.");
 
-
     /*Remove the style of scrollbar to have clean start*/
     lv_obj_remove_style(obj, NULL, LV_PART_SCROLLBAR | LV_STATE_ANY);
 
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_4.py b/lib/lvgl/examples/scroll/lv_example_scroll_4.py
deleted file mode 100644
index 9556f60f..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_4.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#
-# Styling the scrollbars
-#
-obj = lv.obj(lv.scr_act())
-obj.set_size(200, 100)
-obj.center()
-
-label = lv.label(obj)
-label.set_text(
-"""
-Lorem ipsum dolor sit amet, consectetur adipiscing elit.
-Etiam dictum, tortor vestibulum lacinia laoreet, mi neque consectetur neque, vel mattis odio dolor egestas ligula.
-Sed vestibulum sapien nulla, id convallis ex porttitor nec.
-Duis et massa eu libero accumsan faucibus a in arcu.
-Ut pulvinar odio lorem, vel tempus turpis condimentum quis. Nam consectetur condimentum sem in auctor.
-Sed nisl augue, venenatis in blandit et, gravida ac tortor.
-Etiam dapibus elementum suscipit.
-Proin mollis sollicitudin convallis.
-Integer dapibus tempus arcu nec viverra.
-Donec molestie nulla enim, eu interdum velit placerat quis.
-Donec id efficitur risus, at molestie turpis.
-Suspendisse vestibulum consectetur nunc ut commodo.
-Fusce molestie rhoncus nisi sit amet tincidunt.
-Suspendisse a nunc ut magna ornare volutpat.
-""")
-
-
-# Remove the style of scrollbar to have clean start
-obj.remove_style(None, lv.PART.SCROLLBAR | lv.STATE.ANY)
-
-# Create a transition the animate the some properties on state change
-props = [lv.STYLE.BG_OPA, lv.STYLE.WIDTH, 0]
-trans = lv.style_transition_dsc_t()
-trans.init(props, lv.anim_t.path_linear, 200, 0, None)
-
-# Create a style for the scrollbars
-style = lv.style_t()
-style.init()
-style.set_width(4)               # Width of the scrollbar
-style.set_pad_right(5)           # Space from the parallel side
-style.set_pad_top(5)             # Space from the perpendicular side
-
-style.set_radius(2)
-style.set_bg_opa(lv.OPA._70)
-style.set_bg_color(lv.palette_main(lv.PALETTE.BLUE))
-style.set_border_color(lv.palette_darken(lv.PALETTE.BLUE, 3))
-style.set_border_width(2)
-style.set_shadow_width(8)
-style.set_shadow_spread(2)
-style.set_shadow_color(lv.palette_darken(lv.PALETTE.BLUE, 1))
-
-style.set_transition(trans)
-
-# Make the scrollbars wider and use 100% opacity when scrolled
-style_scrolled = lv.style_t()
-style_scrolled.init()
-style_scrolled.set_width(8)
-style_scrolled.set_bg_opa(lv.OPA.COVER)
-
-obj.add_style(style, lv.PART.SCROLLBAR)
-obj.add_style(style_scrolled, lv.PART.SCROLLBAR | lv.STATE.SCROLLED)
-
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_5.c b/lib/lvgl/examples/scroll/lv_example_scroll_5.c
index 60e65ffa..5f0b0af7 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_5.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_5.c
@@ -1,13 +1,12 @@
 #include "../lv_examples.h"
 #if LV_BUILD_EXAMPLES && LV_FONT_DEJAVU_16_PERSIAN_HEBREW
 
-
 /**
  * Scrolling with Right To Left base direction
  */
 void lv_example_scroll_5(void)
 {
-    lv_obj_t * obj = lv_obj_create(lv_scr_act());
+    lv_obj_t * obj = lv_obj_create(lv_screen_active());
     lv_obj_set_style_base_dir(obj, LV_BASE_DIR_RTL, 0);
     lv_obj_set_size(obj, 200, 100);
     lv_obj_center(obj);
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_5.py b/lib/lvgl/examples/scroll/lv_example_scroll_5.py
deleted file mode 100644
index 064d4816..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_5.py
+++ /dev/null
@@ -1,13 +0,0 @@
-#
-# Scrolling with Right To Left base direction
-#
-obj = lv.obj(lv.scr_act())
-obj.set_style_base_dir(lv.BASE_DIR.RTL, 0)
-obj.set_size(200, 100)
-obj.center()
-
-label = lv.label(obj)
-label.set_text("میکروکُنترولر (به انگلیسی: Microcontroller) گونه‌ای ریزپردازنده است که دارای حافظهٔ دسترسی تصادفی (RAM) و حافظهٔ فقط‌خواندنی (ROM)، تایمر، پورت‌های ورودی و خروجی (I/O) و درگاه ترتیبی (Serial Port پورت سریال)، درون خود تراشه است، و می‌تواند به تنهایی ابزارهای دیگر را کنترل کند. به عبارت دیگر یک میکروکنترلر، مدار مجتمع کوچکی است که از یک CPU کوچک و اجزای دیگری مانند تایمر، درگاه‌های ورودی و خروجی آنالوگ و دیجیتال و حافظه تشکیل شده‌است.")
-label.set_width(400)
-label.set_style_text_font(lv.font_dejavu_16_persian_hebrew, 0)
-
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_6.c b/lib/lvgl/examples/scroll/lv_example_scroll_6.c
index 5ce864ac..66dc60da 100644
--- a/lib/lvgl/examples/scroll/lv_example_scroll_6.c
+++ b/lib/lvgl/examples/scroll/lv_example_scroll_6.c
@@ -7,23 +7,23 @@ static void scroll_event_cb(lv_event_t * e)
 
     lv_area_t cont_a;
     lv_obj_get_coords(cont, &cont_a);
-    lv_coord_t cont_y_center = cont_a.y1 + lv_area_get_height(&cont_a) / 2;
+    int32_t cont_y_center = cont_a.y1 + lv_area_get_height(&cont_a) / 2;
 
-    lv_coord_t r = lv_obj_get_height(cont) * 7 / 10;
+    int32_t r = lv_obj_get_height(cont) * 7 / 10;
     uint32_t i;
-    uint32_t child_cnt = lv_obj_get_child_cnt(cont);
+    uint32_t child_cnt = lv_obj_get_child_count(cont);
     for(i = 0; i < child_cnt; i++) {
         lv_obj_t * child = lv_obj_get_child(cont, i);
         lv_area_t child_a;
         lv_obj_get_coords(child, &child_a);
 
-        lv_coord_t child_y_center = child_a.y1 + lv_area_get_height(&child_a) / 2;
+        int32_t child_y_center = child_a.y1 + lv_area_get_height(&child_a) / 2;
 
-        lv_coord_t diff_y = child_y_center - cont_y_center;
+        int32_t diff_y = child_y_center - cont_y_center;
         diff_y = LV_ABS(diff_y);
 
         /*Get the x of diff_y on a circle.*/
-        lv_coord_t x;
+        int32_t x;
         /*If diff_y is out of the circle use the last point of the circle (the radius)*/
         if(diff_y >= r) {
             x = r;
@@ -50,7 +50,7 @@ static void scroll_event_cb(lv_event_t * e)
  */
 void lv_example_scroll_6(void)
 {
-    lv_obj_t * cont = lv_obj_create(lv_scr_act());
+    lv_obj_t * cont = lv_obj_create(lv_screen_active());
     lv_obj_set_size(cont, 200, 200);
     lv_obj_center(cont);
     lv_obj_set_flex_flow(cont, LV_FLEX_FLOW_COLUMN);
@@ -63,7 +63,7 @@ void lv_example_scroll_6(void)
 
     uint32_t i;
     for(i = 0; i < 20; i++) {
-        lv_obj_t * btn = lv_btn_create(cont);
+        lv_obj_t * btn = lv_button_create(cont);
         lv_obj_set_width(btn, lv_pct(100));
 
         lv_obj_t * label = lv_label_create(btn);
@@ -71,7 +71,7 @@ void lv_example_scroll_6(void)
     }
 
     /*Update the buttons position manually for first*/
-    lv_event_send(cont, LV_EVENT_SCROLL, NULL);
+    lv_obj_send_event(cont, LV_EVENT_SCROLL, NULL);
 
     /*Be sure the fist button is in the middle*/
     lv_obj_scroll_to_view(lv_obj_get_child(cont, 0), LV_ANIM_OFF);
diff --git a/lib/lvgl/examples/scroll/lv_example_scroll_6.py b/lib/lvgl/examples/scroll/lv_example_scroll_6.py
deleted file mode 100644
index 9b1e9b86..00000000
--- a/lib/lvgl/examples/scroll/lv_example_scroll_6.py
+++ /dev/null
@@ -1,68 +0,0 @@
-def scroll_event_cb(e):
-
-    cont = e.get_target()
-
-    cont_a = lv.area_t()
-    cont.get_coords(cont_a)
-    cont_y_center = cont_a.y1 + cont_a.get_height() // 2
-
-    r = cont.get_height() * 7 // 10
-
-    child_cnt = cont.get_child_cnt()
-    for i in range(child_cnt):
-        child = cont.get_child(i)
-        child_a = lv.area_t()
-        child.get_coords(child_a)
-
-        child_y_center = child_a.y1 + child_a.get_height() // 2
-
-        diff_y = child_y_center - cont_y_center
-        diff_y = abs(diff_y)
-
-        # Get the x of diff_y on a circle.
-
-        # If diff_y is out of the circle use the last point of the circle (the radius)
-        if diff_y >= r:
-            x = r
-        else:
-            # Use Pythagoras theorem to get x from radius and y
-            x_sqr = r * r - diff_y * diff_y
-            res = lv.sqrt_res_t()
-            lv.sqrt(x_sqr, res, 0x8000)   # Use lvgl's built in sqrt root function
-            x = r - res.i
-
-        # Translate the item by the calculated X coordinate
-        child.set_style_translate_x(x, 0)
-
-        # Use some opacity with larger translations
-        opa = lv.map(x, 0, r, lv.OPA.TRANSP, lv.OPA.COVER)
-        child.set_style_opa(lv.OPA.COVER - opa, 0)
-
-#
-# Translate the object as they scroll
-#
-
-cont = lv.obj(lv.scr_act())
-cont.set_size(200, 200)
-cont.center()
-cont.set_flex_flow(lv.FLEX_FLOW.COLUMN)
-cont.add_event_cb(scroll_event_cb, lv.EVENT.SCROLL, None)
-cont.set_style_radius(lv.RADIUS.CIRCLE, 0)
-cont.set_style_clip_corner(True, 0)
-cont.set_scroll_dir(lv.DIR.VER)
-cont.set_scroll_snap_y(lv.SCROLL_SNAP.CENTER)
-cont.set_scrollbar_mode(lv.SCROLLBAR_MODE.OFF)
-
-for i in range(20):
-    btn = lv.btn(cont)
-    btn.set_width(lv.pct(100))
-
-    label = lv.label(btn)
-    label.set_text("Button " + str(i))
-
-    # Update the buttons position manually for first*
-    lv.event_send(cont, lv.EVENT.SCROLL, None)
-
-    # Be sure the fist button is in the middle
-    #lv.obj.scroll_to_view(cont.get_child(0), lv.ANIM.OFF)
-    cont.get_child(0).scroll_to_view(lv.ANIM.OFF)