how to disable multiples keyboards

sana — Mon, 01 Sep 2025 05:07:11 GMT

Hi team,
currently i am building screens using lvgl gui guider 1.9.1 for our LCD display
In one of my screens i have used 12 texareas where i need to give user input fields hence multiple keybiards are being used how do i disable those i jus need one keyboard for all the textareas.
Basically user needs to give user inputs for multiple fields for this i am using textareas and clicking on tickmark of keyboard triggers a callback to set this is my use case.
Please provide me the solution ASAP.

Thanks and regards,
sahana

Re: how to disable multiples keyboards

Zhiming_Liu — Tue, 02 Sep 2025 01:30:01 GMT

Hi,

Create onelv_keyboard for the screen, hide it by default, and reuse it for every text area.
On text area focus/click, call lv_keyboard_set_textarea(kb, ta) and show the keyboard.
When the user presses OK (✓) on the keyboard, LVGL sends LV_EVENT_READY to the assigned text area—handle that event to commit the value and hide the keyboard.
In LVGL v8/v9, adding your own keyboard event handler does not remove the default handler, so you can add callbacks safely

#include "lvgl.h" static lv_obj_t *kb; static void ta_focus_cb(lv_event_t *e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t *ta = lv_event_get_target(e); if(code == LV_EVENT_FOCUSED || code == LV_EVENT_CLICKED) { lv_keyboard_set_textarea(kb, ta); lv_obj_clear_flag(kb, LV_OBJ_FLAG_HIDDEN); } } static void ta_done_cb(lv_event_t *e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t *ta = lv_event_get_target(e); if(code == LV_EVENT_READY) { const char *val = lv_textarea_get_text(ta); /* your commit callback here with `val` */ lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); } else if(code == LV_EVENT_CANCEL) { lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); } } void screen_init(lv_obj_t *parent) { /* 1) Create one keyboard */ kb = lv_keyboard_create(parent); lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_obj_set_size(kb, LV_PCT(100), LV_PCT(40)); lv_keyboard_set_cursor_manage(kb, true); /* 2) Create multiple text areas (example: 2; repeat for all 12) */ lv_obj_t *ta1 = lv_textarea_create(parent); lv_obj_set_width(ta1, 200); lv_obj_set_pos(ta1, 10, 10); lv_obj_add_event_cb(ta1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_t *ta2 = lv_textarea_create(parent); lv_obj_set_width(ta2, 200); lv_obj_set_pos(ta2, 10, 60); lv_obj_add_event_cb(ta2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta2, ta_done_cb, LV_EVENT_ALL, NULL); /* ...repeat for ta3..ta12... */

Best Regards,
Zhiming

Re: how to disable multiples keyboards

sana — Tue, 02 Sep 2025 20:12:04 GMT

Hi
Thanks for the solution
I am using lvgl guider 1.9.1 with v9.2.1 selected while creating project.

I did get an error saying there is no reference for

lv_keyboard_set_cursor_manage

I have tried my own custom code as you suggested to create input filed text areas but currently i can see overlapping of text area with the keyboard.
how can i overcome this basically i want my page to be scrollable so that user can see through other input check fields by scrolling which will also solve overlapping of keyboard problem i believe.

Attaching the screenshot and the code
Please provide me the solution asap

static lv_obj_t *kb; lv_obj_t *ta_best_load_ratio_val_1; lv_obj_t *ta_eco_cycle_period_val_1; lv_obj_t *ta_eco_min_module_no_val_1; lv_obj_t *ta_rect_save_stop_val_1; lv_obj_t *ta_dry_time_val_1; lv_obj_t *ta_best_load_ratio_val_2; lv_obj_t *ta_eco_cycle_period_val_2; lv_obj_t *ta_eco_min_module_no_val_2; lv_obj_t *ta_dcdc_save_stop_val_2; lv_obj_t *ta_dry_time_val_2; LV_FONT_DECLARE(lv_font_NotoSans_Regular_18); /* --- Callbacks --- */ static void ta_focus_cb(lv_event_t *e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t *ta = lv_event_get_target(e); if(code == LV_EVENT_CLICKED) { lv_keyboard_set_textarea(kb, ta); lv_obj_clear_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_obj_scroll_to_view(ta, LV_ANIM_ON); } } static void ta_done_cb(lv_event_t *e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t *ta = lv_event_get_target(e); if(code == LV_EVENT_READY) { const char *val = lv_textarea_get_text(ta); /* TODO: commit val to your app logic here */ lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); printf("User entered: %s\n", val); fflush(stdout); lv_obj_scroll_to_y(lv_obj_get_parent(ta), 0, LV_ANIM_ON); } else if(code == LV_EVENT_CANCEL) { lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); } } static void kb_event_cb(lv_event_t * e) { lv_event_code_t code = lv_event_get_code(e); lv_obj_t * kb = lv_event_get_target(e); if(code == LV_EVENT_READY) { lv_obj_t * ta = lv_keyboard_get_textarea(kb); if(ta) { const char * txt = lv_textarea_get_text(ta); printf("Committed value: %s\n", txt); fflush(stdout); // reset bg to default lv_obj_set_style_bg_color(ta, lv_color_hex(0xD8D8D8), 0); lv_obj_clear_state(ta, LV_STATE_FOCUSED); } lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); } else if(code == LV_EVENT_CANCEL) { lv_obj_t * ta = lv_keyboard_get_textarea(kb); if(ta) { // reset bg to default lv_obj_set_style_bg_color(ta, lv_color_hex(0xD8D8D8), 0); } lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_keyboard_set_textarea(kb, NULL); } } static void textarea_event_cb(lv_event_t * e) { lv_obj_t * ta = lv_event_get_target(e); lv_event_code_t code = lv_event_get_code(e); if(code == LV_EVENT_CLICKED) { // User clicked / focused → mark editable lv_obj_set_style_bg_color(ta, lv_color_hex(ECO_LABEL_EDIT), 0); } else if(code == LV_EVENT_DEFOCUSED ) { // Lost focus (like clicking outside) → reset lv_obj_set_style_bg_color(ta, lv_color_hex(ECO_LABEL_DEFAULT), 0); } } static void keyboard_event_cb(lv_event_t * e) { lv_obj_t * kb = lv_event_get_target(e); lv_event_code_t code = lv_event_get_code(e); if(code == LV_EVENT_READY) { // Tick / OK button pressed lv_obj_t * ta = lv_keyboard_get_textarea(kb); if(ta) { const char * txt = lv_textarea_get_text(ta); // Simple validation: check if user entered something if(txt && strlen(txt) > 0) { printf("User entered: %s", txt); fflush(stdout); } else { printf("No input provided!"); fflush(stdout); } // Reset to default once input is taken lv_obj_set_style_bg_color(ta, lv_color_hex(ECO_LABEL_DEFAULT), 0); } } } void screen_init(lv_obj_t *parent) { lv_obj_set_scroll_dir(guider_ui.ECO_page, LV_DIR_VER); lv_obj_set_scrollbar_mode(guider_ui.ECO_page, LV_SCROLLBAR_MODE_ON); /* 1) Create one keyboard */ kb = lv_keyboard_create(parent); lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN); lv_obj_set_size(kb, LV_PCT(100), LV_PCT(40)); lv_obj_align(kb, LV_ALIGN_BOTTOM_MID, 0, 0); // lv_obj_add_event_cb(kb, kb_event_cb, LV_EVENT_ALL, NULL); ta_best_load_ratio_val_1 = lv_textarea_create(parent); lv_obj_set_pos(ta_best_load_ratio_val_1, 279, 132); lv_obj_set_size(ta_best_load_ratio_val_1, 104, 30); lv_obj_set_style_bg_color(ta_best_load_ratio_val_1, lv_color_hex(0xE8E8E8), 0); lv_obj_set_style_text_font(ta_best_load_ratio_val_1, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_best_load_ratio_val_1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_best_load_ratio_val_1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_best_load_ratio_val_1, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_best_load_ratio_val_1, LV_OBJ_FLAG_SCROLLABLE); ta_eco_cycle_period_val_1 = lv_textarea_create(parent); lv_obj_set_pos(ta_eco_cycle_period_val_1, 279, 169); lv_obj_set_size(ta_eco_cycle_period_val_1, 104, 30); lv_obj_set_style_bg_color(ta_eco_cycle_period_val_1, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_eco_cycle_period_val_1, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_eco_cycle_period_val_1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_cycle_period_val_1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_cycle_period_val_1, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_eco_cycle_period_val_1, LV_OBJ_FLAG_SCROLLABLE); ta_eco_min_module_no_val_1 = lv_textarea_create(parent); lv_obj_set_pos(ta_eco_min_module_no_val_1, 693, 95); lv_obj_set_size(ta_eco_min_module_no_val_1, 104, 30); lv_obj_set_style_bg_color(ta_eco_min_module_no_val_1, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_eco_min_module_no_val_1, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_eco_min_module_no_val_1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_min_module_no_val_1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_min_module_no_val_1, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_eco_min_module_no_val_1, LV_OBJ_FLAG_SCROLLABLE); ta_rect_save_stop_val_1 = lv_textarea_create(parent); lv_obj_set_pos(ta_rect_save_stop_val_1, 693, 132); lv_obj_set_size(ta_rect_save_stop_val_1, 104, 30); lv_obj_set_style_bg_color(ta_rect_save_stop_val_1, lv_color_hex(0xE8E8E8), 0); lv_obj_set_style_text_font(ta_rect_save_stop_val_1, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_rect_save_stop_val_1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_rect_save_stop_val_1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_rect_save_stop_val_1, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_rect_save_stop_val_1, LV_OBJ_FLAG_SCROLLABLE); ta_dry_time_val_1 = lv_textarea_create(parent); lv_obj_set_pos(ta_dry_time_val_1, 693, 169); lv_obj_set_size(ta_dry_time_val_1, 104, 30); lv_obj_set_style_bg_color(ta_dry_time_val_1, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_dry_time_val_1, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_dry_time_val_1, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dry_time_val_1, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dry_time_val_1, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_dry_time_val_1, LV_OBJ_FLAG_SCROLLABLE); ta_best_load_ratio_val_2 = lv_textarea_create(parent); lv_obj_set_pos(ta_best_load_ratio_val_2, 279, 280); lv_obj_set_size(ta_best_load_ratio_val_2, 104, 30); lv_obj_set_style_bg_color(ta_best_load_ratio_val_2, lv_color_hex(0xE8E8E8), 0); lv_obj_set_style_text_font(ta_best_load_ratio_val_2, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_best_load_ratio_val_2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_best_load_ratio_val_2, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_best_load_ratio_val_2, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_best_load_ratio_val_2, LV_OBJ_FLAG_SCROLLABLE); ta_eco_cycle_period_val_2 = lv_textarea_create(parent); lv_obj_set_pos(ta_eco_cycle_period_val_2, 279, 317); lv_obj_set_size(ta_eco_cycle_period_val_2, 104, 30); lv_obj_set_style_bg_color(ta_eco_cycle_period_val_2, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_eco_cycle_period_val_2, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_eco_cycle_period_val_2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_cycle_period_val_2, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_cycle_period_val_2, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_eco_cycle_period_val_2, LV_OBJ_FLAG_SCROLLABLE); ta_eco_min_module_no_val_2 = lv_textarea_create(parent); lv_obj_set_pos(ta_eco_min_module_no_val_2, 693, 243); lv_obj_set_size(ta_eco_min_module_no_val_2, 104, 30); lv_obj_set_style_bg_color(ta_eco_min_module_no_val_2, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_eco_min_module_no_val_2, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_eco_min_module_no_val_2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_min_module_no_val_2, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_eco_min_module_no_val_2, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_eco_min_module_no_val_2, LV_OBJ_FLAG_SCROLLABLE); ta_dcdc_save_stop_val_2 = lv_textarea_create(parent); lv_obj_set_pos(ta_dcdc_save_stop_val_2, 693, 280); lv_obj_set_size(ta_dcdc_save_stop_val_2, 104, 30); lv_obj_set_style_bg_color(ta_dcdc_save_stop_val_2, lv_color_hex(0xE8E8E8), 0); lv_obj_set_style_text_font(ta_dcdc_save_stop_val_2, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_dcdc_save_stop_val_2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dcdc_save_stop_val_2, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dcdc_save_stop_val_2, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_dcdc_save_stop_val_2, LV_OBJ_FLAG_SCROLLABLE); ta_dry_time_val_2 = lv_textarea_create(parent); lv_obj_set_pos(ta_dry_time_val_2, 693, 317); lv_obj_set_size(ta_dry_time_val_2, 104, 30); lv_obj_set_style_bg_color(ta_dry_time_val_2, lv_color_hex(0xD8D8D8), 0); lv_obj_set_style_text_font(ta_dry_time_val_2, &lv_font_NotoSans_Regular_18, 0); lv_obj_add_event_cb(ta_dry_time_val_2, ta_focus_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dry_time_val_2, ta_done_cb, LV_EVENT_ALL, NULL); lv_obj_add_event_cb(ta_dry_time_val_2, textarea_event_cb, LV_EVENT_ALL, NULL); // lv_obj_clear_flag(ta_dry_time_val_2, LV_OBJ_FLAG_SCROLLABLE); // lv_obj_add_event_cb(kb, keyboard_event_cb, LV_EVENT_ALL, NULL); } /* Initialize custom UI */ void custom_init(lv_ui *ui) { init_screen_timeout(); screen_init(ui->ECO_page); }

Re: how to disable multiples keyboards

sana — Mon, 08 Sep 2025 05:42:37 GMT

Hi anything on this?
Can the team help me with the faster response.
Thanks and regards,

sahana

Re: how to disable multiples keyboards

Zhiming_Liu — Mon, 15 Sep 2025 01:41:46 GMT

Hi,

Please refer the LVGL manual to use scrolling feature.

https://docs.lvgl.io/master/details/common-widget-features/scrolling.html

Best Regards,
Zhiming

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