318     const char * txt = lv_buttonmatrix_get_button_text(obj, btn_id);  in lv_keyboard_def_event_cb()  local
319     if(txt == NULL) return;  in lv_keyboard_def_event_cb()
321     if(lv_strcmp(txt, "abc") == 0) {  in lv_keyboard_def_event_cb()
328     else if(lv_strcmp(txt, "أب") == 0) {  in lv_keyboard_def_event_cb()
335     else if(lv_strcmp(txt, "ABC") == 0) {  in lv_keyboard_def_event_cb()
341     else if(lv_strcmp(txt, "1#") == 0) {  in lv_keyboard_def_event_cb()
347     else if(lv_strcmp(txt, LV_SYMBOL_CLOSE) == 0 || lv_strcmp(txt, LV_SYMBOL_KEYBOARD) == 0) {  in lv_keyboard_def_event_cb()
357     else if(lv_strcmp(txt, LV_SYMBOL_OK) == 0) {  in lv_keyboard_def_event_cb()
371     if(lv_strcmp(txt, "Enter") == 0 || lv_strcmp(txt, LV_SYMBOL_NEW_LINE) == 0) {  in lv_keyboard_def_event_cb()
378     else if(lv_strcmp(txt, LV_SYMBOL_LEFT) == 0) {  in lv_keyboard_def_event_cb()
381     else if(lv_strcmp(txt, LV_SYMBOL_RIGHT) == 0) {  in lv_keyboard_def_event_cb()
384     else if(lv_strcmp(txt, LV_SYMBOL_BACKSPACE) == 0) {  in lv_keyboard_def_event_cb()
387     else if(lv_strcmp(txt, "+/-") == 0) {  in lv_keyboard_def_event_cb()
409         lv_textarea_add_text(keyboard->ta, txt);  in lv_keyboard_def_event_cb()