LuatOS/module/Air8101/demo/lvgl/lvgl_demo_test/textarea.lua

local textarea = {}

local ta1;
local i = 1;
local function event_handler(obj, event)
    if(event == lvgl.EVENT_VALUE_CHANGED) then
        print(string.format("Value: %s\n", lvgl.textarea_get_text(obj)));
    elseif (event == lvgl.EVENT_LONG_PRESSED_REPEAT) then
        --For simple test: Long press the Text are to add the text below
        local txt = "\n\nYou can scroll it if the text is long enough.\n";
        if(i <= #txt) then
            lvgl.textarea_add_char(ta1, txt:byte(i));
            i=i+1;
        end
    end
end

function textarea.demo()
    ta1 = lvgl.textarea_create(lvgl.scr_act(), nil);
    lvgl.obj_set_size(ta1, 200, 100);
    lvgl.obj_align(ta1, nil, lvgl.ALIGN_CENTER, 0, 0);
    lvgl.textarea_set_text(ta1, "A text in a Text Area");    --Set an initial text
    lvgl.obj_set_event_cb(ta1, event_handler);
end

return textarea