ci: build examples with c++ compiler (#8261)

examples/widgets/canvas/lv_example_canvas_11.c

@@ -35,9 +35,10 @@ static void timer_cb(lv_timer_t * timer)
             letter_dsc.unicode = (uint32_t)string[i % string_len];
             letter_dsc.rotation = lv_atan2(y - pre_y, x - pre_x) * 10;
             letter_dsc.color = lv_color_hsv_to_rgb(i * 10, 100, 100);
-            lv_draw_letter(&layer, &letter_dsc, &(lv_point_t) {
+            lv_point_t p = (lv_point_t) {
                 .x = x, .y = y
-            });
+            };
+            lv_draw_letter(&layer, &letter_dsc, &p);
 
             pre_x = x;
             pre_y = y;

examples/widgets/keyboard/lv_example_keyboard_3.c

@@ -14,7 +14,7 @@ static void event_cb(lv_event_t * e)
     /*When the keyboard draws the buttons...*/
     if(base_dsc->part == LV_PART_ITEMS) {
         /*Get a color based on the button's index*/
-        lv_palette_t palette = base_dsc->id1 % LV_PALETTE_LAST;
+        lv_palette_t palette = (lv_palette_t)(base_dsc->id1 % LV_PALETTE_LAST);
         lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
         if(fill_draw_dsc) {
             fill_draw_dsc->color = pressed ? lv_palette_darken(palette, 3) : lv_palette_main(palette);

examples/widgets/menu/lv_example_menu_4.c

@@ -18,11 +18,11 @@ static void float_button_event_cb(lv_event_t * e)
 
     cont = lv_menu_cont_create(sub_page);
     label = lv_label_create(cont);
-    lv_label_set_text_fmt(label, "Hello, I am hiding inside %"LV_PRIu32"", btn_cnt);
+    lv_label_set_text_fmt(label, "Hello, I am hiding inside %" LV_PRIu32"", btn_cnt);
 
     cont = lv_menu_cont_create(main_page);
     label = lv_label_create(cont);
-    lv_label_set_text_fmt(label, "Item %"LV_PRIu32"", btn_cnt);
+    lv_label_set_text_fmt(label, "Item %" LV_PRIu32"", btn_cnt);
     lv_menu_set_load_page_event(menu, cont, sub_page);
 
     lv_obj_scroll_to_view_recursive(cont, LV_ANIM_ON);

examples/widgets/obj/lv_example_obj_2.c

@@ -3,7 +3,7 @@
 
 static void drag_event_handler(lv_event_t * e)
 {
-    lv_obj_t * obj = lv_event_get_target(e);
+    lv_obj_t * obj = lv_event_get_target_obj(e);
 
     lv_indev_t * indev = lv_indev_active();
     if(indev == NULL)  return;

examples/widgets/obj/lv_example_obj_3.c

@@ -4,7 +4,7 @@
 
 static void timer_cb(lv_timer_t * timer)
 {
-    lv_obj_t * obj = lv_timer_get_user_data(timer);
+    lv_obj_t * obj = (lv_obj_t *) lv_timer_get_user_data(timer);
 
     static float value = 0.1f;
     lv_matrix_t matrix;

examples/widgets/table/lv_example_table_2.c

@@ -81,7 +81,7 @@ void lv_example_table_2(void)
 
     uint32_t i;
     for(i = 0; i < ITEM_CNT; i++) {
-        lv_table_set_cell_value_fmt(table, i, 0, "Item %"LV_PRIu32, i + 1);
+        lv_table_set_cell_value_fmt(table, i, 0, "Item %" LV_PRIu32, i + 1);
     }
 
     lv_obj_align(table, LV_ALIGN_CENTER, 0, -20);
@@ -99,7 +99,7 @@ void lv_example_table_2(void)
     uint32_t elaps = lv_tick_elaps(t);
 
     lv_obj_t * label = lv_label_create(lv_screen_active());
-    lv_label_set_text_fmt(label, "%"LV_PRIu32" items were created in %"LV_PRIu32" ms\n"
+    lv_label_set_text_fmt(label, "%" LV_PRIu32" items were created in %" LV_PRIu32" ms\n"
                           "using %zu bytes of memory",
                           (uint32_t)ITEM_CNT, elaps, mem_used);
 

examples/widgets/win/lv_example_win_1.c

@@ -38,7 +38,6 @@ void lv_example_win_1(void)
                       "text to be\n"
                       "sure it\n"
                       "overflows. :)");
-
 }
 
 #endif