chore: update some code and docs to use v9 API (#5876)

Co-authored-by: Neo Xu <neo.xu1990@gmail.com>

examples/arduino/LVGL_Arduino/LVGL_Arduino.ino

@@ -47,7 +47,7 @@ void my_disp_flush( lv_display_t *disp, const lv_area_t *area, uint8_t * px_map)
      */
 
     /*Call it to tell LVGL you are ready*/
-    lv_disp_flush_ready(disp);
+    lv_display_flush_ready(disp);
 }
 
 /*Read the touchpad*/
@@ -112,7 +112,7 @@ void setup()
 
     /* Create a simple label
      * ---------------------
-     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, "Hello Arduino, I'm LVGL!" );
      lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
 
@@ -129,7 +129,7 @@ void setup()
      lv_demo_widgets();
      */
 
-    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, "Hello Arduino, I'm LVGL!" );
     lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
 
@@ -138,6 +138,6 @@ void setup()
 
 void loop()
 {
-    lv_task_handler(); /* let the GUI do its work */
+    lv_timer_handler(); /* let the GUI do its work */
     delay(5); /* let this time pass */
 }

examples/others/observer/lv_example_observer_5.c

@@ -33,7 +33,7 @@ void lv_example_observer_5(void)
     lv_subject_add_observer(&fw_update_status_subject, fw_upload_manager_observer_cb, NULL);
 
     /*Create start FW update button*/
-    lv_obj_t * btn = lv_btn_create(lv_screen_active());
+    lv_obj_t * btn = lv_button_create(lv_screen_active());
     lv_obj_add_event_cb(btn, fw_update_btn_clicked_event_cb, LV_EVENT_CLICKED, NULL);
     lv_obj_center(btn);
     lv_obj_t * label = lv_label_create(btn);

examples/others/observer/lv_example_observer_6.c

@@ -175,7 +175,7 @@ static lv_obj_t * my_button_create(lv_obj_t * parent, const char * text, lv_even
         lv_subject_add_observer_with_target(&theme_subject, my_button_style_observer_cb, &styles, NULL);
     }
 
-    lv_obj_t * btn = lv_btn_create(parent);
+    lv_obj_t * btn = lv_button_create(parent);
     lv_obj_remove_style_all(btn);
     lv_obj_add_style(btn, &styles.style_main, 0);
     lv_obj_add_style(btn, &styles.style_pressed, LV_STATE_PRESSED);

examples/porting/lv_port_indev_template.c

@@ -186,10 +186,10 @@ static void touchpad_read(lv_indev_t * indev_drv, lv_indev_data_t * data)
     /*Save the pressed coordinates and the state*/
     if(touchpad_is_pressed()) {
         touchpad_get_xy(&last_x, &last_y);
-        data->state = LV_INDEV_STATE_PR;
+        data->state = LV_INDEV_STATE_PRESSED;
     }
     else {
-        data->state = LV_INDEV_STATE_REL;
+        data->state = LV_INDEV_STATE_RELEASED;
     }
 
     /*Set the last pressed coordinates*/
@@ -232,10 +232,10 @@ static void mouse_read(lv_indev_t * indev_drv, lv_indev_data_t * data)
 
     /*Get whether the mouse button is pressed or released*/
     if(mouse_is_pressed()) {
-        data->state = LV_INDEV_STATE_PR;
+        data->state = LV_INDEV_STATE_PRESSED;
     }
     else {
-        data->state = LV_INDEV_STATE_REL;
+        data->state = LV_INDEV_STATE_RELEASED;
     }
 }
 
@@ -277,7 +277,7 @@ static void keypad_read(lv_indev_t * indev_drv, lv_indev_data_t * data)
     /*Get whether the a key is pressed and save the pressed key*/
     uint32_t act_key = keypad_get_key();
     if(act_key != 0) {
-        data->state = LV_INDEV_STATE_PR;
+        data->state = LV_INDEV_STATE_PRESSED;
 
         /*Translate the keys to LVGL control characters according to your key definitions*/
         switch(act_key) {
@@ -301,7 +301,7 @@ static void keypad_read(lv_indev_t * indev_drv, lv_indev_data_t * data)
         last_key = act_key;
     }
     else {
-        data->state = LV_INDEV_STATE_REL;
+        data->state = LV_INDEV_STATE_RELEASED;
     }
 
     data->key = last_key;
@@ -339,7 +339,7 @@ static void encoder_handler(void)
     /*Your code comes here*/
 
     encoder_diff += 0;
-    encoder_state = LV_INDEV_STATE_REL;
+    encoder_state = LV_INDEV_STATE_RELEASED;
 }
 
 /*------------------
@@ -362,11 +362,11 @@ static void button_read(lv_indev_t * indev_drv, lv_indev_data_t * data)
     int8_t btn_act = button_get_pressed_id();
 
     if(btn_act >= 0) {
-        data->state = LV_INDEV_STATE_PR;
+        data->state = LV_INDEV_STATE_PRESSED;
         last_btn = btn_act;
     }
     else {
-        data->state = LV_INDEV_STATE_REL;
+        data->state = LV_INDEV_STATE_RELEASED;
     }
 
     /*Save the last pressed button's ID*/

examples/widgets/scale/lv_example_scale_3.c

@@ -81,7 +81,7 @@ void lv_example_scale_3(void)
     lv_scale_set_rotation(scale_img, 135);
 
     /* image must point to the right. E.g. -O------>*/
-    needle_img = lv_img_create(scale_img);
+    needle_img = lv_image_create(scale_img);
     lv_image_set_src(needle_img, &img_hand);
     lv_obj_align(needle_img, LV_ALIGN_CENTER, 47, -2);
     lv_image_set_pivot(needle_img, 3, 4);